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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 05:12:49 +00:00
3e689141e6
Fix all selftests to include libbpf header files with the bpf/ prefix, to
be consistent with external users of the library. Also ensure that all
includes of exported libbpf header files (those that are exported on 'make
install' of the library) use bracketed includes instead of quoted.
To not break the build, keep the old include path until everything has been
changed to the new one; a subsequent patch will remove that.
Fixes: 6910d7d386 ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157952560568.1683545.9649335788846513446.stgit@toke.dk
120 lines
5.4 KiB
C
120 lines
5.4 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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#ifndef __BPF_TRACE_HELPERS_H
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#define __BPF_TRACE_HELPERS_H
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#include <bpf/bpf_helpers.h>
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#define ___bpf_concat(a, b) a ## b
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#define ___bpf_apply(fn, n) ___bpf_concat(fn, n)
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#define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N
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#define ___bpf_narg(...) \
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___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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#define ___bpf_empty(...) \
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___bpf_nth(_, ##__VA_ARGS__, N, N, N, N, N, N, N, N, N, N, 0)
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#define ___bpf_ctx_cast0() ctx
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#define ___bpf_ctx_cast1(x) ___bpf_ctx_cast0(), (void *)ctx[0]
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#define ___bpf_ctx_cast2(x, args...) ___bpf_ctx_cast1(args), (void *)ctx[1]
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#define ___bpf_ctx_cast3(x, args...) ___bpf_ctx_cast2(args), (void *)ctx[2]
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#define ___bpf_ctx_cast4(x, args...) ___bpf_ctx_cast3(args), (void *)ctx[3]
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#define ___bpf_ctx_cast5(x, args...) ___bpf_ctx_cast4(args), (void *)ctx[4]
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#define ___bpf_ctx_cast6(x, args...) ___bpf_ctx_cast5(args), (void *)ctx[5]
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#define ___bpf_ctx_cast7(x, args...) ___bpf_ctx_cast6(args), (void *)ctx[6]
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#define ___bpf_ctx_cast8(x, args...) ___bpf_ctx_cast7(args), (void *)ctx[7]
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#define ___bpf_ctx_cast9(x, args...) ___bpf_ctx_cast8(args), (void *)ctx[8]
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#define ___bpf_ctx_cast10(x, args...) ___bpf_ctx_cast9(args), (void *)ctx[9]
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#define ___bpf_ctx_cast11(x, args...) ___bpf_ctx_cast10(args), (void *)ctx[10]
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#define ___bpf_ctx_cast12(x, args...) ___bpf_ctx_cast11(args), (void *)ctx[11]
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#define ___bpf_ctx_cast(args...) \
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___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args)
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/*
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* BPF_PROG is a convenience wrapper for generic tp_btf/fentry/fexit and
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* similar kinds of BPF programs, that accept input arguments as a single
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* pointer to untyped u64 array, where each u64 can actually be a typed
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* pointer or integer of different size. Instead of requring user to write
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* manual casts and work with array elements by index, BPF_PROG macro
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* allows user to declare a list of named and typed input arguments in the
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* same syntax as for normal C function. All the casting is hidden and
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* performed transparently, while user code can just assume working with
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* function arguments of specified type and name.
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*
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* Original raw context argument is preserved as well as 'ctx' argument.
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* This is useful when using BPF helpers that expect original context
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* as one of the parameters (e.g., for bpf_perf_event_output()).
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*/
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#define BPF_PROG(name, args...) \
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name(unsigned long long *ctx); \
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static __always_inline typeof(name(0)) \
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____##name(unsigned long long *ctx, ##args); \
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typeof(name(0)) name(unsigned long long *ctx) \
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{ \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \
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return ____##name(___bpf_ctx_cast(args)); \
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_Pragma("GCC diagnostic pop") \
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} \
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static __always_inline typeof(name(0)) \
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____##name(unsigned long long *ctx, ##args)
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struct pt_regs;
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#define ___bpf_kprobe_args0() ctx
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#define ___bpf_kprobe_args1(x) \
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___bpf_kprobe_args0(), (void *)PT_REGS_PARM1(ctx)
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#define ___bpf_kprobe_args2(x, args...) \
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___bpf_kprobe_args1(args), (void *)PT_REGS_PARM2(ctx)
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#define ___bpf_kprobe_args3(x, args...) \
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___bpf_kprobe_args2(args), (void *)PT_REGS_PARM3(ctx)
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#define ___bpf_kprobe_args4(x, args...) \
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___bpf_kprobe_args3(args), (void *)PT_REGS_PARM4(ctx)
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#define ___bpf_kprobe_args5(x, args...) \
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___bpf_kprobe_args4(args), (void *)PT_REGS_PARM5(ctx)
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#define ___bpf_kprobe_args(args...) \
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___bpf_apply(___bpf_kprobe_args, ___bpf_narg(args))(args)
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/*
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* BPF_KPROBE serves the same purpose for kprobes as BPF_PROG for
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* tp_btf/fentry/fexit BPF programs. It hides the underlying platform-specific
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* low-level way of getting kprobe input arguments from struct pt_regs, and
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* provides a familiar typed and named function arguments syntax and
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* semantics of accessing kprobe input paremeters.
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*
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* Original struct pt_regs* context is preserved as 'ctx' argument. This might
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* be necessary when using BPF helpers like bpf_perf_event_output().
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*/
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#define BPF_KPROBE(name, args...) \
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name(struct pt_regs *ctx); \
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static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args);\
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typeof(name(0)) name(struct pt_regs *ctx) \
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{ \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \
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return ____##name(___bpf_kprobe_args(args)); \
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_Pragma("GCC diagnostic pop") \
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} \
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static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
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#define ___bpf_kretprobe_args0() ctx
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#define ___bpf_kretprobe_argsN(x, args...) \
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___bpf_kprobe_args(args), (void *)PT_REGS_RET(ctx)
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#define ___bpf_kretprobe_args(args...) \
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___bpf_apply(___bpf_kretprobe_args, ___bpf_empty(args))(args)
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/*
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* BPF_KRETPROBE is similar to BPF_KPROBE, except, in addition to listing all
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* input kprobe arguments, one last extra argument has to be specified, which
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* captures kprobe return value.
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*/
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#define BPF_KRETPROBE(name, args...) \
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name(struct pt_regs *ctx); \
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static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args);\
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typeof(name(0)) name(struct pt_regs *ctx) \
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{ \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \
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return ____##name(___bpf_kretprobe_args(args)); \
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_Pragma("GCC diagnostic pop") \
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} \
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static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
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#endif
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