// SPDX-License-Identifier: GPL-2.0
/* Copyright 2022 Sony Group Corporation */
#define _GNU_SOURCE
#include <fcntl.h>
#include <sys/prctl.h>
#include <test_progs.h>
#include "bpf_syscall_macro.skel.h"

void test_bpf_syscall_macro(void)
{
        struct bpf_syscall_macro *skel = NULL;
        int err;
        int exp_arg1 = 1001;
        unsigned long exp_arg2 = 12;
        unsigned long exp_arg3 = 13;
        unsigned long exp_arg4 = 14;
        unsigned long exp_arg5 = 15;
        loff_t off_in, off_out;
        ssize_t r;

        /* check whether it can open program */
        skel = bpf_syscall_macro__open();
        if (!ASSERT_OK_PTR(skel, "bpf_syscall_macro__open"))
                return;

        skel->rodata->filter_pid = getpid();

        /* check whether it can load program */
        err = bpf_syscall_macro__load(skel);
        if (!ASSERT_OK(err, "bpf_syscall_macro__load"))
                goto cleanup;

        /* check whether it can attach kprobe */
        err = bpf_syscall_macro__attach(skel);
        if (!ASSERT_OK(err, "bpf_syscall_macro__attach"))
                goto cleanup;

        /* check whether args of syscall are copied correctly */
        prctl(exp_arg1, exp_arg2, exp_arg3, exp_arg4, exp_arg5);

        ASSERT_EQ(skel->bss->arg1, exp_arg1, "syscall_arg1");
        ASSERT_EQ(skel->bss->arg2, exp_arg2, "syscall_arg2");
        ASSERT_EQ(skel->bss->arg3, exp_arg3, "syscall_arg3");
        /* it cannot copy arg4 when uses PT_REGS_PARM4 on x86_64 */
#ifdef __x86_64__
        ASSERT_NEQ(skel->bss->arg4_cx, exp_arg4, "syscall_arg4_from_cx");
#else
        ASSERT_EQ(skel->bss->arg4_cx, exp_arg4, "syscall_arg4_from_cx");
#endif
        ASSERT_EQ(skel->bss->arg4, exp_arg4, "syscall_arg4");
        ASSERT_EQ(skel->bss->arg5, exp_arg5, "syscall_arg5");

        /* check whether args of syscall are copied correctly for CORE variants */
        ASSERT_EQ(skel->bss->arg1_core, exp_arg1, "syscall_arg1_core_variant");
        ASSERT_EQ(skel->bss->arg2_core, exp_arg2, "syscall_arg2_core_variant");
        ASSERT_EQ(skel->bss->arg3_core, exp_arg3, "syscall_arg3_core_variant");
        /* it cannot copy arg4 when uses PT_REGS_PARM4_CORE on x86_64 */
#ifdef __x86_64__
        ASSERT_NEQ(skel->bss->arg4_core_cx, exp_arg4, "syscall_arg4_from_cx_core_variant");
#else
        ASSERT_EQ(skel->bss->arg4_core_cx, exp_arg4, "syscall_arg4_from_cx_core_variant");
#endif
        ASSERT_EQ(skel->bss->arg4_core, exp_arg4, "syscall_arg4_core_variant");
        ASSERT_EQ(skel->bss->arg5_core, exp_arg5, "syscall_arg5_core_variant");

        ASSERT_EQ(skel->bss->option_syscall, exp_arg1, "BPF_KPROBE_SYSCALL_option");
        ASSERT_EQ(skel->bss->arg2_syscall, exp_arg2, "BPF_KPROBE_SYSCALL_arg2");
        ASSERT_EQ(skel->bss->arg3_syscall, exp_arg3, "BPF_KPROBE_SYSCALL_arg3");
        ASSERT_EQ(skel->bss->arg4_syscall, exp_arg4, "BPF_KPROBE_SYSCALL_arg4");
        ASSERT_EQ(skel->bss->arg5_syscall, exp_arg5, "BPF_KPROBE_SYSCALL_arg5");

        r = splice(-42, &off_in, 42, &off_out, 0x12340000, SPLICE_F_NONBLOCK);
        err = -errno;
        ASSERT_EQ(r, -1, "splice_res");
        ASSERT_EQ(err, -EBADF, "splice_err");

        ASSERT_EQ(skel->bss->splice_fd_in, -42, "splice_arg1");
        ASSERT_EQ(skel->bss->splice_off_in, (__u64)&off_in, "splice_arg2");
        ASSERT_EQ(skel->bss->splice_fd_out, 42, "splice_arg3");
        ASSERT_EQ(skel->bss->splice_off_out, (__u64)&off_out, "splice_arg4");
        ASSERT_EQ(skel->bss->splice_len, 0x12340000, "splice_arg5");
        ASSERT_EQ(skel->bss->splice_flags, SPLICE_F_NONBLOCK, "splice_arg6");

cleanup:
        bpf_syscall_macro__destroy(skel);
}