| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| */ |
| #ifndef _UAPI__LINUX_BPF_H__ |
| #define _UAPI__LINUX_BPF_H__ |
| |
| #include <linux/types.h> |
| #include <linux/bpf_common.h> |
| |
| /* Extended instruction set based on top of classic BPF */ |
| |
| /* instruction classes */ |
| #define BPF_ALU64 0x07 /* alu mode in double word width */ |
| |
| /* ld/ldx fields */ |
| #define BPF_DW 0x18 /* double word (64-bit) */ |
| #define BPF_XADD 0xc0 /* exclusive add */ |
| |
| /* alu/jmp fields */ |
| #define BPF_MOV 0xb0 /* mov reg to reg */ |
| #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ |
| |
| /* change endianness of a register */ |
| #define BPF_END 0xd0 /* flags for endianness conversion: */ |
| #define BPF_TO_LE 0x00 /* convert to little-endian */ |
| #define BPF_TO_BE 0x08 /* convert to big-endian */ |
| #define BPF_FROM_LE BPF_TO_LE |
| #define BPF_FROM_BE BPF_TO_BE |
| |
| /* jmp encodings */ |
| #define BPF_JNE 0x50 /* jump != */ |
| #define BPF_JLT 0xa0 /* LT is unsigned, '<' */ |
| #define BPF_JLE 0xb0 /* LE is unsigned, '<=' */ |
| #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ |
| #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ |
| #define BPF_JSLT 0xc0 /* SLT is signed, '<' */ |
| #define BPF_JSLE 0xd0 /* SLE is signed, '<=' */ |
| #define BPF_CALL 0x80 /* function call */ |
| #define BPF_EXIT 0x90 /* function return */ |
| |
| /* Register numbers */ |
| enum { |
| BPF_REG_0 = 0, |
| BPF_REG_1, |
| BPF_REG_2, |
| BPF_REG_3, |
| BPF_REG_4, |
| BPF_REG_5, |
| BPF_REG_6, |
| BPF_REG_7, |
| BPF_REG_8, |
| BPF_REG_9, |
| BPF_REG_10, |
| __MAX_BPF_REG, |
| }; |
| |
| /* BPF has 10 general purpose 64-bit registers and stack frame. */ |
| #define MAX_BPF_REG __MAX_BPF_REG |
| |
| struct bpf_insn { |
| __u8 code; /* opcode */ |
| __u8 dst_reg:4; /* dest register */ |
| __u8 src_reg:4; /* source register */ |
| __s16 off; /* signed offset */ |
| __s32 imm; /* signed immediate constant */ |
| }; |
| |
| /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */ |
| struct bpf_lpm_trie_key { |
| __u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */ |
| __u8 data[0]; /* Arbitrary size */ |
| }; |
| |
| /* BPF syscall commands, see bpf(2) man-page for details. */ |
| enum bpf_cmd { |
| BPF_MAP_CREATE, |
| BPF_MAP_LOOKUP_ELEM, |
| BPF_MAP_UPDATE_ELEM, |
| BPF_MAP_DELETE_ELEM, |
| BPF_MAP_GET_NEXT_KEY, |
| BPF_PROG_LOAD, |
| BPF_OBJ_PIN, |
| BPF_OBJ_GET, |
| BPF_PROG_ATTACH, |
| BPF_PROG_DETACH, |
| BPF_PROG_TEST_RUN, |
| BPF_PROG_GET_NEXT_ID, |
| BPF_MAP_GET_NEXT_ID, |
| BPF_PROG_GET_FD_BY_ID, |
| BPF_MAP_GET_FD_BY_ID, |
| BPF_OBJ_GET_INFO_BY_FD, |
| BPF_PROG_QUERY, |
| }; |
| |
| enum bpf_map_type { |
| BPF_MAP_TYPE_UNSPEC, |
| BPF_MAP_TYPE_HASH, |
| BPF_MAP_TYPE_ARRAY, |
| BPF_MAP_TYPE_PROG_ARRAY, |
| BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
| BPF_MAP_TYPE_PERCPU_HASH, |
| BPF_MAP_TYPE_PERCPU_ARRAY, |
| BPF_MAP_TYPE_STACK_TRACE, |
| BPF_MAP_TYPE_CGROUP_ARRAY, |
| BPF_MAP_TYPE_LRU_HASH, |
| BPF_MAP_TYPE_LRU_PERCPU_HASH, |
| BPF_MAP_TYPE_LPM_TRIE, |
| BPF_MAP_TYPE_ARRAY_OF_MAPS, |
| BPF_MAP_TYPE_HASH_OF_MAPS, |
| BPF_MAP_TYPE_DEVMAP, |
| BPF_MAP_TYPE_SOCKMAP, |
| BPF_MAP_TYPE_CPUMAP, |
| }; |
| |
| enum bpf_prog_type { |
| BPF_PROG_TYPE_UNSPEC, |
| BPF_PROG_TYPE_SOCKET_FILTER, |
| BPF_PROG_TYPE_KPROBE, |
| BPF_PROG_TYPE_SCHED_CLS, |
| BPF_PROG_TYPE_SCHED_ACT, |
| BPF_PROG_TYPE_TRACEPOINT, |
| BPF_PROG_TYPE_XDP, |
| BPF_PROG_TYPE_PERF_EVENT, |
| BPF_PROG_TYPE_CGROUP_SKB, |
| BPF_PROG_TYPE_CGROUP_SOCK, |
| BPF_PROG_TYPE_LWT_IN, |
| BPF_PROG_TYPE_LWT_OUT, |
| BPF_PROG_TYPE_LWT_XMIT, |
| BPF_PROG_TYPE_SOCK_OPS, |
| BPF_PROG_TYPE_SK_SKB, |
| BPF_PROG_TYPE_CGROUP_DEVICE, |
| }; |
| |
| enum bpf_attach_type { |
| BPF_CGROUP_INET_INGRESS, |
| BPF_CGROUP_INET_EGRESS, |
| BPF_CGROUP_INET_SOCK_CREATE, |
| BPF_CGROUP_SOCK_OPS, |
| BPF_SK_SKB_STREAM_PARSER, |
| BPF_SK_SKB_STREAM_VERDICT, |
| BPF_CGROUP_DEVICE, |
| __MAX_BPF_ATTACH_TYPE |
| }; |
| |
| #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE |
| |
| /* cgroup-bpf attach flags used in BPF_PROG_ATTACH command |
| * |
| * NONE(default): No further bpf programs allowed in the subtree. |
| * |
| * BPF_F_ALLOW_OVERRIDE: If a sub-cgroup installs some bpf program, |
| * the program in this cgroup yields to sub-cgroup program. |
| * |
| * BPF_F_ALLOW_MULTI: If a sub-cgroup installs some bpf program, |
| * that cgroup program gets run in addition to the program in this cgroup. |
| * |
| * Only one program is allowed to be attached to a cgroup with |
| * NONE or BPF_F_ALLOW_OVERRIDE flag. |
| * Attaching another program on top of NONE or BPF_F_ALLOW_OVERRIDE will |
| * release old program and attach the new one. Attach flags has to match. |
| * |
| * Multiple programs are allowed to be attached to a cgroup with |
| * BPF_F_ALLOW_MULTI flag. They are executed in FIFO order |
| * (those that were attached first, run first) |
| * The programs of sub-cgroup are executed first, then programs of |
| * this cgroup and then programs of parent cgroup. |
| * When children program makes decision (like picking TCP CA or sock bind) |
| * parent program has a chance to override it. |
| * |
| * A cgroup with MULTI or OVERRIDE flag allows any attach flags in sub-cgroups. |
| * A cgroup with NONE doesn't allow any programs in sub-cgroups. |
| * Ex1: |
| * cgrp1 (MULTI progs A, B) -> |
| * cgrp2 (OVERRIDE prog C) -> |
| * cgrp3 (MULTI prog D) -> |
| * cgrp4 (OVERRIDE prog E) -> |
| * cgrp5 (NONE prog F) |
| * the event in cgrp5 triggers execution of F,D,A,B in that order. |
| * if prog F is detached, the execution is E,D,A,B |
| * if prog F and D are detached, the execution is E,A,B |
| * if prog F, E and D are detached, the execution is C,A,B |
| * |
| * All eligible programs are executed regardless of return code from |
| * earlier programs. |
| */ |
| #define BPF_F_ALLOW_OVERRIDE (1U << 0) |
| #define BPF_F_ALLOW_MULTI (1U << 1) |
| |
| /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the |
| * verifier will perform strict alignment checking as if the kernel |
| * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set, |
| * and NET_IP_ALIGN defined to 2. |
| */ |
| #define BPF_F_STRICT_ALIGNMENT (1U << 0) |
| |
| /* when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd */ |
| #define BPF_PSEUDO_MAP_FD 1 |
| |
| /* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative |
| * offset to another bpf function |
| */ |
| #define BPF_PSEUDO_CALL 1 |
| |
| /* flags for BPF_MAP_UPDATE_ELEM command */ |
| #define BPF_ANY 0 /* create new element or update existing */ |
| #define BPF_NOEXIST 1 /* create new element if it didn't exist */ |
| #define BPF_EXIST 2 /* update existing element */ |
| |
| /* flags for BPF_MAP_CREATE command */ |
| #define BPF_F_NO_PREALLOC (1U << 0) |
| /* Instead of having one common LRU list in the |
| * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list |
| * which can scale and perform better. |
| * Note, the LRU nodes (including free nodes) cannot be moved |
| * across different LRU lists. |
| */ |
| #define BPF_F_NO_COMMON_LRU (1U << 1) |
| /* Specify numa node during map creation */ |
| #define BPF_F_NUMA_NODE (1U << 2) |
| |
| /* flags for BPF_PROG_QUERY */ |
| #define BPF_F_QUERY_EFFECTIVE (1U << 0) |
| |
| #define BPF_OBJ_NAME_LEN 16U |
| |
| /* Flags for accessing BPF object */ |
| #define BPF_F_RDONLY (1U << 3) |
| #define BPF_F_WRONLY (1U << 4) |
| |
| union bpf_attr { |
| struct { /* anonymous struct used by BPF_MAP_CREATE command */ |
| __u32 map_type; /* one of enum bpf_map_type */ |
| __u32 key_size; /* size of key in bytes */ |
| __u32 value_size; /* size of value in bytes */ |
| __u32 max_entries; /* max number of entries in a map */ |
| __u32 map_flags; /* BPF_MAP_CREATE related |
| * flags defined above. |
| */ |
| __u32 inner_map_fd; /* fd pointing to the inner map */ |
| __u32 numa_node; /* numa node (effective only if |
| * BPF_F_NUMA_NODE is set). |
| */ |
| char map_name[BPF_OBJ_NAME_LEN]; |
| __u32 map_ifindex; /* ifindex of netdev to create on */ |
| }; |
| |
| struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */ |
| __u32 map_fd; |
| __aligned_u64 key; |
| union { |
| __aligned_u64 value; |
| __aligned_u64 next_key; |
| }; |
| __u64 flags; |
| }; |
| |
| struct { /* anonymous struct used by BPF_PROG_LOAD command */ |
| __u32 prog_type; /* one of enum bpf_prog_type */ |
| __u32 insn_cnt; |
| __aligned_u64 insns; |
| __aligned_u64 license; |
| __u32 log_level; /* verbosity level of verifier */ |
| __u32 log_size; /* size of user buffer */ |
| __aligned_u64 log_buf; /* user supplied buffer */ |
| __u32 kern_version; /* checked when prog_type=kprobe */ |
| __u32 prog_flags; |
| char prog_name[BPF_OBJ_NAME_LEN]; |
| __u32 prog_ifindex; /* ifindex of netdev to prep for */ |
| }; |
| |
| struct { /* anonymous struct used by BPF_OBJ_* commands */ |
| __aligned_u64 pathname; |
| __u32 bpf_fd; |
| __u32 file_flags; |
| }; |
| |
| struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */ |
| __u32 target_fd; /* container object to attach to */ |
| __u32 attach_bpf_fd; /* eBPF program to attach */ |
| __u32 attach_type; |
| __u32 attach_flags; |
| }; |
| |
| struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */ |
| __u32 prog_fd; |
| __u32 retval; |
| __u32 data_size_in; |
| __u32 data_size_out; |
| __aligned_u64 data_in; |
| __aligned_u64 data_out; |
| __u32 repeat; |
| __u32 duration; |
| } test; |
| |
| struct { /* anonymous struct used by BPF_*_GET_*_ID */ |
| union { |
| __u32 start_id; |
| __u32 prog_id; |
| __u32 map_id; |
| }; |
| __u32 next_id; |
| __u32 open_flags; |
| }; |
| |
| struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */ |
| __u32 bpf_fd; |
| __u32 info_len; |
| __aligned_u64 info; |
| } info; |
| |
| struct { /* anonymous struct used by BPF_PROG_QUERY command */ |
| __u32 target_fd; /* container object to query */ |
| __u32 attach_type; |
| __u32 query_flags; |
| __u32 attach_flags; |
| __aligned_u64 prog_ids; |
| __u32 prog_cnt; |
| } query; |
| } __attribute__((aligned(8))); |
| |
| /* BPF helper function descriptions: |
| * |
| * void *bpf_map_lookup_elem(&map, &key) |
| * Return: Map value or NULL |
| * |
| * int bpf_map_update_elem(&map, &key, &value, flags) |
| * Return: 0 on success or negative error |
| * |
| * int bpf_map_delete_elem(&map, &key) |
| * Return: 0 on success or negative error |
| * |
| * int bpf_probe_read(void *dst, int size, void *src) |
| * Return: 0 on success or negative error |
| * |
| * u64 bpf_ktime_get_ns(void) |
| * Return: current ktime |
| * |
| * int bpf_trace_printk(const char *fmt, int fmt_size, ...) |
| * Return: length of buffer written or negative error |
| * |
| * u32 bpf_prandom_u32(void) |
| * Return: random value |
| * |
| * u32 bpf_raw_smp_processor_id(void) |
| * Return: SMP processor ID |
| * |
| * int bpf_skb_store_bytes(skb, offset, from, len, flags) |
| * store bytes into packet |
| * @skb: pointer to skb |
| * @offset: offset within packet from skb->mac_header |
| * @from: pointer where to copy bytes from |
| * @len: number of bytes to store into packet |
| * @flags: bit 0 - if true, recompute skb->csum |
| * other bits - reserved |
| * Return: 0 on success or negative error |
| * |
| * int bpf_l3_csum_replace(skb, offset, from, to, flags) |
| * recompute IP checksum |
| * @skb: pointer to skb |
| * @offset: offset within packet where IP checksum is located |
| * @from: old value of header field |
| * @to: new value of header field |
| * @flags: bits 0-3 - size of header field |
| * other bits - reserved |
| * Return: 0 on success or negative error |
| * |
| * int bpf_l4_csum_replace(skb, offset, from, to, flags) |
| * recompute TCP/UDP checksum |
| * @skb: pointer to skb |
| * @offset: offset within packet where TCP/UDP checksum is located |
| * @from: old value of header field |
| * @to: new value of header field |
| * @flags: bits 0-3 - size of header field |
| * bit 4 - is pseudo header |
| * other bits - reserved |
| * Return: 0 on success or negative error |
| * |
| * int bpf_tail_call(ctx, prog_array_map, index) |
| * jump into another BPF program |
| * @ctx: context pointer passed to next program |
| * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY |
| * @index: 32-bit index inside array that selects specific program to run |
| * Return: 0 on success or negative error |
| * |
| * int bpf_clone_redirect(skb, ifindex, flags) |
| * redirect to another netdev |
| * @skb: pointer to skb |
| * @ifindex: ifindex of the net device |
| * @flags: bit 0 - if set, redirect to ingress instead of egress |
| * other bits - reserved |
| * Return: 0 on success or negative error |
| * |
| * u64 bpf_get_current_pid_tgid(void) |
| * Return: current->tgid << 32 | current->pid |
| * |
| * u64 bpf_get_current_uid_gid(void) |
| * Return: current_gid << 32 | current_uid |
| * |
| * int bpf_get_current_comm(char *buf, int size_of_buf) |
| * stores current->comm into buf |
| * Return: 0 on success or negative error |
| * |
| * u32 bpf_get_cgroup_classid(skb) |
| * retrieve a proc's classid |
| * @skb: pointer to skb |
| * Return: classid if != 0 |
| * |
| * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_vlan_pop(skb) |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_get_tunnel_key(skb, key, size, flags) |
| * int bpf_skb_set_tunnel_key(skb, key, size, flags) |
| * retrieve or populate tunnel metadata |
| * @skb: pointer to skb |
| * @key: pointer to 'struct bpf_tunnel_key' |
| * @size: size of 'struct bpf_tunnel_key' |
| * @flags: room for future extensions |
| * Return: 0 on success or negative error |
| * |
| * u64 bpf_perf_event_read(map, flags) |
| * read perf event counter value |
| * @map: pointer to perf_event_array map |
| * @flags: index of event in the map or bitmask flags |
| * Return: value of perf event counter read or error code |
| * |
| * int bpf_redirect(ifindex, flags) |
| * redirect to another netdev |
| * @ifindex: ifindex of the net device |
| * @flags: |
| * cls_bpf: |
| * bit 0 - if set, redirect to ingress instead of egress |
| * other bits - reserved |
| * xdp_bpf: |
| * all bits - reserved |
| * Return: cls_bpf: TC_ACT_REDIRECT on success or TC_ACT_SHOT on error |
| * xdp_bfp: XDP_REDIRECT on success or XDP_ABORT on error |
| * int bpf_redirect_map(map, key, flags) |
| * redirect to endpoint in map |
| * @map: pointer to dev map |
| * @key: index in map to lookup |
| * @flags: -- |
| * Return: XDP_REDIRECT on success or XDP_ABORT on error |
| * |
| * u32 bpf_get_route_realm(skb) |
| * retrieve a dst's tclassid |
| * @skb: pointer to skb |
| * Return: realm if != 0 |
| * |
| * int bpf_perf_event_output(ctx, map, flags, data, size) |
| * output perf raw sample |
| * @ctx: struct pt_regs* |
| * @map: pointer to perf_event_array map |
| * @flags: index of event in the map or bitmask flags |
| * @data: data on stack to be output as raw data |
| * @size: size of data |
| * Return: 0 on success or negative error |
| * |
| * int bpf_get_stackid(ctx, map, flags) |
| * walk user or kernel stack and return id |
| * @ctx: struct pt_regs* |
| * @map: pointer to stack_trace map |
| * @flags: bits 0-7 - numer of stack frames to skip |
| * bit 8 - collect user stack instead of kernel |
| * bit 9 - compare stacks by hash only |
| * bit 10 - if two different stacks hash into the same stackid |
| * discard old |
| * other bits - reserved |
| * Return: >= 0 stackid on success or negative error |
| * |
| * s64 bpf_csum_diff(from, from_size, to, to_size, seed) |
| * calculate csum diff |
| * @from: raw from buffer |
| * @from_size: length of from buffer |
| * @to: raw to buffer |
| * @to_size: length of to buffer |
| * @seed: optional seed |
| * Return: csum result or negative error code |
| * |
| * int bpf_skb_get_tunnel_opt(skb, opt, size) |
| * retrieve tunnel options metadata |
| * @skb: pointer to skb |
| * @opt: pointer to raw tunnel option data |
| * @size: size of @opt |
| * Return: option size |
| * |
| * int bpf_skb_set_tunnel_opt(skb, opt, size) |
| * populate tunnel options metadata |
| * @skb: pointer to skb |
| * @opt: pointer to raw tunnel option data |
| * @size: size of @opt |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_change_proto(skb, proto, flags) |
| * Change protocol of the skb. Currently supported is v4 -> v6, |
| * v6 -> v4 transitions. The helper will also resize the skb. eBPF |
| * program is expected to fill the new headers via skb_store_bytes |
| * and lX_csum_replace. |
| * @skb: pointer to skb |
| * @proto: new skb->protocol type |
| * @flags: reserved |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_change_type(skb, type) |
| * Change packet type of skb. |
| * @skb: pointer to skb |
| * @type: new skb->pkt_type type |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_under_cgroup(skb, map, index) |
| * Check cgroup2 membership of skb |
| * @skb: pointer to skb |
| * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type |
| * @index: index of the cgroup in the bpf_map |
| * Return: |
| * == 0 skb failed the cgroup2 descendant test |
| * == 1 skb succeeded the cgroup2 descendant test |
| * < 0 error |
| * |
| * u32 bpf_get_hash_recalc(skb) |
| * Retrieve and possibly recalculate skb->hash. |
| * @skb: pointer to skb |
| * Return: hash |
| * |
| * u64 bpf_get_current_task(void) |
| * Returns current task_struct |
| * Return: current |
| * |
| * int bpf_probe_write_user(void *dst, void *src, int len) |
| * safely attempt to write to a location |
| * @dst: destination address in userspace |
| * @src: source address on stack |
| * @len: number of bytes to copy |
| * Return: 0 on success or negative error |
| * |
| * int bpf_current_task_under_cgroup(map, index) |
| * Check cgroup2 membership of current task |
| * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type |
| * @index: index of the cgroup in the bpf_map |
| * Return: |
| * == 0 current failed the cgroup2 descendant test |
| * == 1 current succeeded the cgroup2 descendant test |
| * < 0 error |
| * |
| * int bpf_skb_change_tail(skb, len, flags) |
| * The helper will resize the skb to the given new size, to be used f.e. |
| * with control messages. |
| * @skb: pointer to skb |
| * @len: new skb length |
| * @flags: reserved |
| * Return: 0 on success or negative error |
| * |
| * int bpf_skb_pull_data(skb, len) |
| * The helper will pull in non-linear data in case the skb is non-linear |
| * and not all of len are part of the linear section. Only needed for |
| * read/write with direct packet access. |
| * @skb: pointer to skb |
| * @len: len to make read/writeable |
| * Return: 0 on success or negative error |
| * |
| * s64 bpf_csum_update(skb, csum) |
| * Adds csum into skb->csum in case of CHECKSUM_COMPLETE. |
| * @skb: pointer to skb |
| * @csum: csum to add |
| * Return: csum on success or negative error |
| * |
| * void bpf_set_hash_invalid(skb) |
| * Invalidate current skb->hash. |
| * @skb: pointer to skb |
| * |
| * int bpf_get_numa_node_id() |
| * Return: Id of current NUMA node. |
| * |
| * int bpf_skb_change_head() |
| * Grows headroom of skb and adjusts MAC header offset accordingly. |
| * Will extends/reallocae as required automatically. |
| * May change skb data pointer and will thus invalidate any check |
| * performed for direct packet access. |
| * @skb: pointer to skb |
| * @len: length of header to be pushed in front |
| * @flags: Flags (unused for now) |
| * Return: 0 on success or negative error |
| * |
| * int bpf_xdp_adjust_head(xdp_md, delta) |
| * Adjust the xdp_md.data by delta |
| * @xdp_md: pointer to xdp_md |
| * @delta: An positive/negative integer to be added to xdp_md.data |
| * Return: 0 on success or negative on error |
| * |
| * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr) |
| * Copy a NUL terminated string from unsafe address. In case the string |
| * length is smaller than size, the target is not padded with further NUL |
| * bytes. In case the string length is larger than size, just count-1 |
| * bytes are copied and the last byte is set to NUL. |
| * @dst: destination address |
| * @size: maximum number of bytes to copy, including the trailing NUL |
| * @unsafe_ptr: unsafe address |
| * Return: |
| * > 0 length of the string including the trailing NUL on success |
| * < 0 error |
| * |
| * u64 bpf_get_socket_cookie(skb) |
| * Get the cookie for the socket stored inside sk_buff. |
| * @skb: pointer to skb |
| * Return: 8 Bytes non-decreasing number on success or 0 if the socket |
| * field is missing inside sk_buff |
| * |
| * u32 bpf_get_socket_uid(skb) |
| * Get the owner uid of the socket stored inside sk_buff. |
| * @skb: pointer to skb |
| * Return: uid of the socket owner on success or overflowuid if failed. |
| * |
| * u32 bpf_set_hash(skb, hash) |
| * Set full skb->hash. |
| * @skb: pointer to skb |
| * @hash: hash to set |
| * |
| * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen) |
| * Calls setsockopt. Not all opts are available, only those with |
| * integer optvals plus TCP_CONGESTION. |
| * Supported levels: SOL_SOCKET and IPPROTO_TCP |
| * @bpf_socket: pointer to bpf_socket |
| * @level: SOL_SOCKET or IPPROTO_TCP |
| * @optname: option name |
| * @optval: pointer to option value |
| * @optlen: length of optval in bytes |
| * Return: 0 or negative error |
| * |
| * int bpf_getsockopt(bpf_socket, level, optname, optval, optlen) |
| * Calls getsockopt. Not all opts are available. |
| * Supported levels: IPPROTO_TCP |
| * @bpf_socket: pointer to bpf_socket |
| * @level: IPPROTO_TCP |
| * @optname: option name |
| * @optval: pointer to option value |
| * @optlen: length of optval in bytes |
| * Return: 0 or negative error |
| * |
| * int bpf_sock_ops_cb_flags_set(bpf_sock_ops, flags) |
| * Set callback flags for sock_ops |
| * @bpf_sock_ops: pointer to bpf_sock_ops_kern struct |
| * @flags: flags value |
| * Return: 0 for no error |
| * -EINVAL if there is no full tcp socket |
| * bits in flags that are not supported by current kernel |
| * |
| * int bpf_skb_adjust_room(skb, len_diff, mode, flags) |
| * Grow or shrink room in sk_buff. |
| * @skb: pointer to skb |
| * @len_diff: (signed) amount of room to grow/shrink |
| * @mode: operation mode (enum bpf_adj_room_mode) |
| * @flags: reserved for future use |
| * Return: 0 on success or negative error code |
| * |
| * int bpf_sk_redirect_map(map, key, flags) |
| * Redirect skb to a sock in map using key as a lookup key for the |
| * sock in map. |
| * @map: pointer to sockmap |
| * @key: key to lookup sock in map |
| * @flags: reserved for future use |
| * Return: SK_PASS |
| * |
| * int bpf_sock_map_update(skops, map, key, flags) |
| * @skops: pointer to bpf_sock_ops |
| * @map: pointer to sockmap to update |
| * @key: key to insert/update sock in map |
| * @flags: same flags as map update elem |
| * |
| * int bpf_xdp_adjust_meta(xdp_md, delta) |
| * Adjust the xdp_md.data_meta by delta |
| * @xdp_md: pointer to xdp_md |
| * @delta: An positive/negative integer to be added to xdp_md.data_meta |
| * Return: 0 on success or negative on error |
| * |
| * int bpf_perf_event_read_value(map, flags, buf, buf_size) |
| * read perf event counter value and perf event enabled/running time |
| * @map: pointer to perf_event_array map |
| * @flags: index of event in the map or bitmask flags |
| * @buf: buf to fill |
| * @buf_size: size of the buf |
| * Return: 0 on success or negative error code |
| * |
| * int bpf_perf_prog_read_value(ctx, buf, buf_size) |
| * read perf prog attached perf event counter and enabled/running time |
| * @ctx: pointer to ctx |
| * @buf: buf to fill |
| * @buf_size: size of the buf |
| * Return : 0 on success or negative error code |
| * |
| * int bpf_override_return(pt_regs, rc) |
| * @pt_regs: pointer to struct pt_regs |
| * @rc: the return value to set |
| */ |
| #define __BPF_FUNC_MAPPER(FN) \ |
| FN(unspec), \ |
| FN(map_lookup_elem), \ |
| FN(map_update_elem), \ |
| FN(map_delete_elem), \ |
| FN(probe_read), \ |
| FN(ktime_get_ns), \ |
| FN(trace_printk), \ |
| FN(get_prandom_u32), \ |
| FN(get_smp_processor_id), \ |
| FN(skb_store_bytes), \ |
| FN(l3_csum_replace), \ |
| FN(l4_csum_replace), \ |
| FN(tail_call), \ |
| FN(clone_redirect), \ |
| FN(get_current_pid_tgid), \ |
| FN(get_current_uid_gid), \ |
| FN(get_current_comm), \ |
| FN(get_cgroup_classid), \ |
| FN(skb_vlan_push), \ |
| FN(skb_vlan_pop), \ |
| FN(skb_get_tunnel_key), \ |
| FN(skb_set_tunnel_key), \ |
| FN(perf_event_read), \ |
| FN(redirect), \ |
| FN(get_route_realm), \ |
| FN(perf_event_output), \ |
| FN(skb_load_bytes), \ |
| FN(get_stackid), \ |
| FN(csum_diff), \ |
| FN(skb_get_tunnel_opt), \ |
| FN(skb_set_tunnel_opt), \ |
| FN(skb_change_proto), \ |
| FN(skb_change_type), \ |
| FN(skb_under_cgroup), \ |
| FN(get_hash_recalc), \ |
| FN(get_current_task), \ |
| FN(probe_write_user), \ |
| FN(current_task_under_cgroup), \ |
| FN(skb_change_tail), \ |
| FN(skb_pull_data), \ |
| FN(csum_update), \ |
| FN(set_hash_invalid), \ |
| FN(get_numa_node_id), \ |
| FN(skb_change_head), \ |
| FN(xdp_adjust_head), \ |
| FN(probe_read_str), \ |
| FN(get_socket_cookie), \ |
| FN(get_socket_uid), \ |
| FN(set_hash), \ |
| FN(setsockopt), \ |
| FN(skb_adjust_room), \ |
| FN(redirect_map), \ |
| FN(sk_redirect_map), \ |
| FN(sock_map_update), \ |
| FN(xdp_adjust_meta), \ |
| FN(perf_event_read_value), \ |
| FN(perf_prog_read_value), \ |
| FN(getsockopt), \ |
| FN(override_return), \ |
| FN(sock_ops_cb_flags_set), |
| |
| /* integer value in 'imm' field of BPF_CALL instruction selects which helper |
| * function eBPF program intends to call |
| */ |
| #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x |
| enum bpf_func_id { |
| __BPF_FUNC_MAPPER(__BPF_ENUM_FN) |
| __BPF_FUNC_MAX_ID, |
| }; |
| #undef __BPF_ENUM_FN |
| |
| /* All flags used by eBPF helper functions, placed here. */ |
| |
| /* BPF_FUNC_skb_store_bytes flags. */ |
| #define BPF_F_RECOMPUTE_CSUM (1ULL << 0) |
| #define BPF_F_INVALIDATE_HASH (1ULL << 1) |
| |
| /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags. |
| * First 4 bits are for passing the header field size. |
| */ |
| #define BPF_F_HDR_FIELD_MASK 0xfULL |
| |
| /* BPF_FUNC_l4_csum_replace flags. */ |
| #define BPF_F_PSEUDO_HDR (1ULL << 4) |
| #define BPF_F_MARK_MANGLED_0 (1ULL << 5) |
| #define BPF_F_MARK_ENFORCE (1ULL << 6) |
| |
| /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ |
| #define BPF_F_INGRESS (1ULL << 0) |
| |
| /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */ |
| #define BPF_F_TUNINFO_IPV6 (1ULL << 0) |
| |
| /* BPF_FUNC_get_stackid flags. */ |
| #define BPF_F_SKIP_FIELD_MASK 0xffULL |
| #define BPF_F_USER_STACK (1ULL << 8) |
| #define BPF_F_FAST_STACK_CMP (1ULL << 9) |
| #define BPF_F_REUSE_STACKID (1ULL << 10) |
| |
| /* BPF_FUNC_skb_set_tunnel_key flags. */ |
| #define BPF_F_ZERO_CSUM_TX (1ULL << 1) |
| #define BPF_F_DONT_FRAGMENT (1ULL << 2) |
| |
| /* BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and |
| * BPF_FUNC_perf_event_read_value flags. |
| */ |
| #define BPF_F_INDEX_MASK 0xffffffffULL |
| #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK |
| /* BPF_FUNC_perf_event_output for sk_buff input context. */ |
| #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) |
| |
| /* Mode for BPF_FUNC_skb_adjust_room helper. */ |
| enum bpf_adj_room_mode { |
| BPF_ADJ_ROOM_NET, |
| }; |
| |
| /* user accessible mirror of in-kernel sk_buff. |
| * new fields can only be added to the end of this structure |
| */ |
| struct __sk_buff { |
| __u32 len; |
| __u32 pkt_type; |
| __u32 mark; |
| __u32 queue_mapping; |
| __u32 protocol; |
| __u32 vlan_present; |
| __u32 vlan_tci; |
| __u32 vlan_proto; |
| __u32 priority; |
| __u32 ingress_ifindex; |
| __u32 ifindex; |
| __u32 tc_index; |
| __u32 cb[5]; |
| __u32 hash; |
| __u32 tc_classid; |
| __u32 data; |
| __u32 data_end; |
| __u32 napi_id; |
| |
| /* Accessed by BPF_PROG_TYPE_sk_skb types from here to ... */ |
| __u32 family; |
| __u32 remote_ip4; /* Stored in network byte order */ |
| __u32 local_ip4; /* Stored in network byte order */ |
| __u32 remote_ip6[4]; /* Stored in network byte order */ |
| __u32 local_ip6[4]; /* Stored in network byte order */ |
| __u32 remote_port; /* Stored in network byte order */ |
| __u32 local_port; /* stored in host byte order */ |
| /* ... here. */ |
| |
| __u32 data_meta; |
| }; |
| |
| struct bpf_tunnel_key { |
| __u32 tunnel_id; |
| union { |
| __u32 remote_ipv4; |
| __u32 remote_ipv6[4]; |
| }; |
| __u8 tunnel_tos; |
| __u8 tunnel_ttl; |
| __u16 tunnel_ext; |
| __u32 tunnel_label; |
| }; |
| |
| /* Generic BPF return codes which all BPF program types may support. |
| * The values are binary compatible with their TC_ACT_* counter-part to |
| * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT |
| * programs. |
| * |
| * XDP is handled seprately, see XDP_*. |
| */ |
| enum bpf_ret_code { |
| BPF_OK = 0, |
| /* 1 reserved */ |
| BPF_DROP = 2, |
| /* 3-6 reserved */ |
| BPF_REDIRECT = 7, |
| /* >127 are reserved for prog type specific return codes */ |
| }; |
| |
| struct bpf_sock { |
| __u32 bound_dev_if; |
| __u32 family; |
| __u32 type; |
| __u32 protocol; |
| __u32 mark; |
| __u32 priority; |
| }; |
| |
| #define XDP_PACKET_HEADROOM 256 |
| |
| /* User return codes for XDP prog type. |
| * A valid XDP program must return one of these defined values. All other |
| * return codes are reserved for future use. Unknown return codes will |
| * result in packet drops and a warning via bpf_warn_invalid_xdp_action(). |
| */ |
| enum xdp_action { |
| XDP_ABORTED = 0, |
| XDP_DROP, |
| XDP_PASS, |
| XDP_TX, |
| XDP_REDIRECT, |
| }; |
| |
| /* user accessible metadata for XDP packet hook |
| * new fields must be added to the end of this structure |
| */ |
| struct xdp_md { |
| __u32 data; |
| __u32 data_end; |
| __u32 data_meta; |
| /* Below access go through struct xdp_rxq_info */ |
| __u32 ingress_ifindex; /* rxq->dev->ifindex */ |
| __u32 rx_queue_index; /* rxq->queue_index */ |
| }; |
| |
| enum sk_action { |
| SK_DROP = 0, |
| SK_PASS, |
| }; |
| |
| #define BPF_TAG_SIZE 8 |
| |
| struct bpf_prog_info { |
| __u32 type; |
| __u32 id; |
| __u8 tag[BPF_TAG_SIZE]; |
| __u32 jited_prog_len; |
| __u32 xlated_prog_len; |
| __aligned_u64 jited_prog_insns; |
| __aligned_u64 xlated_prog_insns; |
| __u64 load_time; /* ns since boottime */ |
| __u32 created_by_uid; |
| __u32 nr_map_ids; |
| __aligned_u64 map_ids; |
| char name[BPF_OBJ_NAME_LEN]; |
| __u32 ifindex; |
| __u64 netns_dev; |
| __u64 netns_ino; |
| } __attribute__((aligned(8))); |
| |
| struct bpf_map_info { |
| __u32 type; |
| __u32 id; |
| __u32 key_size; |
| __u32 value_size; |
| __u32 max_entries; |
| __u32 map_flags; |
| char name[BPF_OBJ_NAME_LEN]; |
| __u32 ifindex; |
| __u64 netns_dev; |
| __u64 netns_ino; |
| } __attribute__((aligned(8))); |
| |
| /* User bpf_sock_ops struct to access socket values and specify request ops |
| * and their replies. |
| * Some of this fields are in network (bigendian) byte order and may need |
| * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h). |
| * New fields can only be added at the end of this structure |
| */ |
| struct bpf_sock_ops { |
| __u32 op; |
| union { |
| __u32 args[4]; /* Optionally passed to bpf program */ |
| __u32 reply; /* Returned by bpf program */ |
| __u32 replylong[4]; /* Optionally returned by bpf prog */ |
| }; |
| __u32 family; |
| __u32 remote_ip4; /* Stored in network byte order */ |
| __u32 local_ip4; /* Stored in network byte order */ |
| __u32 remote_ip6[4]; /* Stored in network byte order */ |
| __u32 local_ip6[4]; /* Stored in network byte order */ |
| __u32 remote_port; /* Stored in network byte order */ |
| __u32 local_port; /* stored in host byte order */ |
| __u32 is_fullsock; /* Some TCP fields are only valid if |
| * there is a full socket. If not, the |
| * fields read as zero. |
| */ |
| __u32 snd_cwnd; |
| __u32 srtt_us; /* Averaged RTT << 3 in usecs */ |
| __u32 bpf_sock_ops_cb_flags; /* flags defined in uapi/linux/tcp.h */ |
| __u32 state; |
| __u32 rtt_min; |
| __u32 snd_ssthresh; |
| __u32 rcv_nxt; |
| __u32 snd_nxt; |
| __u32 snd_una; |
| __u32 mss_cache; |
| __u32 ecn_flags; |
| __u32 rate_delivered; |
| __u32 rate_interval_us; |
| __u32 packets_out; |
| __u32 retrans_out; |
| __u32 total_retrans; |
| __u32 segs_in; |
| __u32 data_segs_in; |
| __u32 segs_out; |
| __u32 data_segs_out; |
| __u32 lost_out; |
| __u32 sacked_out; |
| __u32 sk_txhash; |
| __u64 bytes_received; |
| __u64 bytes_acked; |
| }; |
| |
| /* Definitions for bpf_sock_ops_cb_flags */ |
| #define BPF_SOCK_OPS_RTO_CB_FLAG (1<<0) |
| #define BPF_SOCK_OPS_RETRANS_CB_FLAG (1<<1) |
| #define BPF_SOCK_OPS_STATE_CB_FLAG (1<<2) |
| #define BPF_SOCK_OPS_ALL_CB_FLAGS 0x7 /* Mask of all currently |
| * supported cb flags |
| */ |
| |
| /* List of known BPF sock_ops operators. |
| * New entries can only be added at the end |
| */ |
| enum { |
| BPF_SOCK_OPS_VOID, |
| BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or |
| * -1 if default value should be used |
| */ |
| BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized |
| * window (in packets) or -1 if default |
| * value should be used |
| */ |
| BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an |
| * active connection is initialized |
| */ |
| BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an |
| * active connection is |
| * established |
| */ |
| BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a |
| * passive connection is |
| * established |
| */ |
| BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control |
| * needs ECN |
| */ |
| BPF_SOCK_OPS_BASE_RTT, /* Get base RTT. The correct value is |
| * based on the path and may be |
| * dependent on the congestion control |
| * algorithm. In general it indicates |
| * a congestion threshold. RTTs above |
| * this indicate congestion |
| */ |
| BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered. |
| * Arg1: value of icsk_retransmits |
| * Arg2: value of icsk_rto |
| * Arg3: whether RTO has expired |
| */ |
| BPF_SOCK_OPS_RETRANS_CB, /* Called when skb is retransmitted. |
| * Arg1: sequence number of 1st byte |
| * Arg2: # segments |
| * Arg3: return value of |
| * tcp_transmit_skb (0 => success) |
| */ |
| BPF_SOCK_OPS_STATE_CB, /* Called when TCP changes state. |
| * Arg1: old_state |
| * Arg2: new_state |
| */ |
| }; |
| |
| /* List of TCP states. There is a build check in net/ipv4/tcp.c to detect |
| * changes between the TCP and BPF versions. Ideally this should never happen. |
| * If it does, we need to add code to convert them before calling |
| * the BPF sock_ops function. |
| */ |
| enum { |
| BPF_TCP_ESTABLISHED = 1, |
| BPF_TCP_SYN_SENT, |
| BPF_TCP_SYN_RECV, |
| BPF_TCP_FIN_WAIT1, |
| BPF_TCP_FIN_WAIT2, |
| BPF_TCP_TIME_WAIT, |
| BPF_TCP_CLOSE, |
| BPF_TCP_CLOSE_WAIT, |
| BPF_TCP_LAST_ACK, |
| BPF_TCP_LISTEN, |
| BPF_TCP_CLOSING, /* Now a valid state */ |
| BPF_TCP_NEW_SYN_RECV, |
| |
| BPF_TCP_MAX_STATES /* Leave at the end! */ |
| }; |
| |
| #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */ |
| #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */ |
| |
| struct bpf_perf_event_value { |
| __u64 counter; |
| __u64 enabled; |
| __u64 running; |
| }; |
| |
| #define BPF_DEVCG_ACC_MKNOD (1ULL << 0) |
| #define BPF_DEVCG_ACC_READ (1ULL << 1) |
| #define BPF_DEVCG_ACC_WRITE (1ULL << 2) |
| |
| #define BPF_DEVCG_DEV_BLOCK (1ULL << 0) |
| #define BPF_DEVCG_DEV_CHAR (1ULL << 1) |
| |
| struct bpf_cgroup_dev_ctx { |
| /* access_type encoded as (BPF_DEVCG_ACC_* << 16) | BPF_DEVCG_DEV_* */ |
| __u32 access_type; |
| __u32 major; |
| __u32 minor; |
| }; |
| |
| #endif /* _UAPI__LINUX_BPF_H__ */ |