bpf_helper_defs.h

Go to the documentation of this file.

// Copyright (c) Microsoft Corporation
// SPDX-License-Identifier: MIT
#pragma once
 
// This file contains APIs for global helpers that are exposed for
// use by all eBPF programs.  Libbpf has bpf_helper_defs.h which is
// auto-generated but it's not platform-agnostic currently as it
// hard-codes the actual helper IDs.
 
EBPF_HELPER(void*, bpf_map_lookup_elem, (void* map, void* key));
#ifndef __doxygen
#define bpf_map_lookup_elem ((bpf_map_lookup_elem_t)BPF_FUNC_map_lookup_elem)
#endif
 
EBPF_HELPER(int64_t, bpf_map_update_elem, (void* map, void* key, void* value, uint64_t flags));
#ifndef __doxygen
#define bpf_map_update_elem ((bpf_map_update_elem_t)BPF_FUNC_map_update_elem)
#endif
 
EBPF_HELPER(int64_t, bpf_map_delete_elem, (void* map, void* key));
#ifndef __doxygen
#define bpf_map_delete_elem ((bpf_map_delete_elem_t)BPF_FUNC_map_delete_elem)
#endif
 
EBPF_HELPER(void*, bpf_map_lookup_and_delete_elem, (void* map, void* key));
#ifndef __doxygen
#define bpf_map_lookup_and_delete_elem ((bpf_map_lookup_and_delete_elem_t)BPF_FUNC_map_lookup_and_delete_elem)
#endif
 
EBPF_HELPER(int64_t, bpf_tail_call, (void* ctx, void* prog_array_map, uint32_t index));
#ifndef __doxygen
#define bpf_tail_call ((bpf_tail_call_t)BPF_FUNC_tail_call)
#endif
 
EBPF_HELPER(uint32_t, bpf_get_prandom_u32, ());
#ifndef __doxygen
#define bpf_get_prandom_u32 ((bpf_get_prandom_u32_t)BPF_FUNC_get_prandom_u32)
#endif
 
EBPF_HELPER(uint64_t, bpf_ktime_get_boot_ns, ());
#ifndef __doxygen
#define bpf_ktime_get_boot_ns ((bpf_ktime_get_boot_ns_t)BPF_FUNC_ktime_get_boot_ns)
#endif
 
EBPF_HELPER(uint64_t, bpf_get_smp_processor_id, ());
#ifndef __doxygen
#define bpf_get_smp_processor_id ((bpf_get_smp_processor_id_t)BPF_FUNC_get_smp_processor_id)
#endif
 
EBPF_HELPER(uint64_t, bpf_ktime_get_ns, ());
#ifndef __doxygen
#define bpf_ktime_get_ns ((bpf_ktime_get_ns_t)BPF_FUNC_ktime_get_ns)
#endif
 
EBPF_HELPER(int, bpf_csum_diff, (void* from, int from_size, void* to, int to_size, int seed));
#ifndef __doxygen
#define bpf_csum_diff ((bpf_csum_diff_t)BPF_FUNC_csum_diff)
#endif
 
EBPF_HELPER(int, bpf_ringbuf_output, (void* ring_buffer, void* data, uint64_t size, uint64_t flags));
#ifndef __doxygen
#define bpf_ringbuf_output ((bpf_ringbuf_output_t)BPF_FUNC_ringbuf_output)
#endif
 
EBPF_HELPER(long, bpf_trace_printk2, (const char* fmt, uint32_t fmt_size));
#ifndef __doxygen
#define bpf_trace_printk2 ((bpf_trace_printk2_t)BPF_FUNC_trace_printk2)
#endif
 
EBPF_HELPER(long, bpf_trace_printk3, (const char* fmt, uint32_t fmt_size, uint64_t arg3));
#ifndef __doxygen
#define bpf_trace_printk3 ((bpf_trace_printk3_t)BPF_FUNC_trace_printk3)
#endif
 
EBPF_HELPER(long, bpf_trace_printk4, (const char* fmt, uint32_t fmt_size, uint64_t arg3, uint64_t arg4));
#ifndef __doxygen
#define bpf_trace_printk4 ((bpf_trace_printk4_t)BPF_FUNC_trace_printk4)
#endif
 
EBPF_HELPER(long, bpf_trace_printk5, (const char* fmt, uint32_t fmt_size, uint64_t arg3, uint64_t arg4, uint64_t arg5));
#ifndef __doxygen
#define bpf_trace_printk5 ((bpf_trace_printk5_t)BPF_FUNC_trace_printk5)
#endif
 
#ifndef __doxygen
// The following macros allow bpf_printk to accept a variable number of arguments
// while mapping to separate helper functions that each have a strict prototype
// that can be understood by the verifier.
#define EBPF_CONCATENATE(X, Y) X##Y
#define EBPF_MAKE_HELPER_NAME(PREFIX, ARG_COUNT) EBPF_CONCATENATE(PREFIX, ARG_COUNT)
#define EBPF_GET_NTH_ARG(_1, _2, _3, _4, _5, N, ...) N
#define EBPF_COUNT_VA_ARGS(...) EBPF_GET_NTH_ARG(__VA_ARGS__, 5, 4, 3, 2, 1)
#define EBPF_VA_ARGS_HELPER(PREFIX, ...) EBPF_MAKE_HELPER_NAME(PREFIX, EBPF_COUNT_VA_ARGS(__VA_ARGS__))(__VA_ARGS__)
 
#undef bpf_trace_printk
#define bpf_trace_printk(fmt, size, ...) ({ EBPF_VA_ARGS_HELPER(bpf_trace_printk, fmt, size, ##__VA_ARGS__); })
#else
long
bpf_trace_printk(const char* fmt, uint32_t size, ...);
#endif
 
#ifndef __doxygen
#undef bpf_printk
#define bpf_printk(fmt, ...)                                       \
    ({                                                             \
        char ____fmt[] = fmt;                                      \
        bpf_trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \
    })
#else
long
bpf_printk(const char* fmt, ...);
#endif
 
EBPF_HELPER(int64_t, bpf_map_push_elem, (void* map, void* value, uint64_t flags));
#ifndef __doxygen
#define bpf_map_push_elem ((bpf_map_push_elem_t)BPF_FUNC_map_push_elem)
#endif
 
EBPF_HELPER(int64_t, bpf_map_pop_elem, (void* map, void* value));
#ifndef __doxygen
#define bpf_map_pop_elem ((bpf_map_pop_elem_t)BPF_FUNC_map_pop_elem)
#endif
 
EBPF_HELPER(int64_t, bpf_map_peek_elem, (void* map, void* value));
#ifndef __doxygen
#define bpf_map_peek_elem ((bpf_map_pop_elem_t)BPF_FUNC_map_peek_elem)
#endif
 
EBPF_HELPER(uint64_t, bpf_get_current_pid_tgid, ());
#ifndef __doxygen
#define bpf_get_current_pid_tgid ((bpf_get_current_pid_tgid_t)BPF_FUNC_get_current_pid_tgid)
#endif
 
EBPF_HELPER(uint64_t, bpf_get_current_logon_id, (const void* ctx));
#ifndef __doxygen
#define bpf_get_current_logon_id ((bpf_get_current_logon_id_t)BPF_FUNC_get_current_logon_id)
#endif
 
EBPF_HELPER(int32_t, bpf_is_current_admin, (const void* ctx));
#ifndef __doxygen
#define bpf_is_current_admin ((bpf_is_current_admin_t)BPF_FUNC_is_current_admin)
#endif