| /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| */ |
| #ifndef _UAPI__LINUX_BPF_H__ |
| #define _UAPI__LINUX_BPF_H__ |
| |
| #include <linux/types.h> |
| #include <linux/bpf_common.h> |
| |
| /* Extended instruction set based on top of classic BPF */ |
| |
| /* instruction classes */ |
| #define BPF_ALU64 0x07 /* alu mode in double word width */ |
| |
| /* ld/ldx fields */ |
| #define BPF_DW 0x18 /* double word */ |
| #define BPF_XADD 0xc0 /* exclusive add */ |
| |
| /* alu/jmp fields */ |
| #define BPF_MOV 0xb0 /* mov reg to reg */ |
| #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ |
| |
| /* change endianness of a register */ |
| #define BPF_END 0xd0 /* flags for endianness conversion: */ |
| #define BPF_TO_LE 0x00 /* convert to little-endian */ |
| #define BPF_TO_BE 0x08 /* convert to big-endian */ |
| #define BPF_FROM_LE BPF_TO_LE |
| #define BPF_FROM_BE BPF_TO_BE |
| |
| #define BPF_JNE 0x50 /* jump != */ |
| #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ |
| #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ |
| #define BPF_CALL 0x80 /* function call */ |
| #define BPF_EXIT 0x90 /* function return */ |
| |
| /* Register numbers */ |
| enum { |
| BPF_REG_0 = 0, |
| BPF_REG_1, |
| BPF_REG_2, |
| BPF_REG_3, |
| BPF_REG_4, |
| BPF_REG_5, |
| BPF_REG_6, |
| BPF_REG_7, |
| BPF_REG_8, |
| BPF_REG_9, |
| BPF_REG_10, |
| __MAX_BPF_REG, |
| }; |
| |
| /* BPF has 10 general purpose 64-bit registers and stack frame. */ |
| #define MAX_BPF_REG __MAX_BPF_REG |
| |
| struct bpf_insn { |
| __u8 code; /* opcode */ |
| __u8 dst_reg:4; /* dest register */ |
| __u8 src_reg:4; /* source register */ |
| __s16 off; /* signed offset */ |
| __s32 imm; /* signed immediate constant */ |
| }; |
| |
| /* 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, |
| }; |
| |
| 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, |
| }; |
| |
| 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, |
| }; |
| |
| enum bpf_attach_type { |
| BPF_CGROUP_INET_INGRESS, |
| BPF_CGROUP_INET_EGRESS, |
| BPF_CGROUP_INET_SOCK_CREATE, |
| __MAX_BPF_ATTACH_TYPE |
| }; |
| |
| #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE |
| |
| /* If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command |
| * to the given target_fd cgroup the descendent cgroup will be able to |
| * override effective bpf program that was inherited from this cgroup |
| */ |
| #define BPF_F_ALLOW_OVERRIDE (1U << 0) |
| |
| #define BPF_PSEUDO_MAP_FD 1 |
| |
| /* flags for BPF_MAP_UPDATE_ELEM command */ |
| #define BPF_ANY 0 /* create new element or update existing */ |
| #define BPF_NOEXIST 1 /* create new element if it didn't exist */ |
| #define BPF_EXIST 2 /* update existing element */ |
| |
| #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) |
| |
| 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; /* prealloc or not */ |
| }; |
| |
| 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 */ |
| }; |
| |
| struct { /* anonymous struct used by BPF_OBJ_* commands */ |
| __aligned_u64 pathname; |
| __u32 bpf_fd; |
| }; |
| |
| 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; |
| }; |
| } __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: 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, index) |
| * Return: Number events read or error code |
| * |
| * int bpf_redirect(ifindex, flags) |
| * redirect to another netdev |
| * @ifindex: ifindex of the net device |
| * @flags: bit 0 - if set, redirect to ingress instead of egress |
| * other bits - reserved |
| * Return: TC_ACT_REDIRECT |
| * |
| * 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, index, data, size) |
| * output perf raw sample |
| * @ctx: struct pt_regs* |
| * @map: pointer to perf_event_array map |
| * @index: index of event in the map |
| * @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 |
| */ |
| #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), |
| |
| /* 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 and BPF_FUNC_perf_event_read 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) |
| |
| /* 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; |
| }; |
| |
| 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; |
| }; |
| |
| #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 drop. |
| */ |
| enum xdp_action { |
| XDP_ABORTED = 0, |
| XDP_DROP, |
| XDP_PASS, |
| XDP_TX, |
| }; |
| |
| /* 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; |
| }; |
| |
| #endif /* _UAPI__LINUX_BPF_H__ */ |