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05c9b2eda8
The test verifies attachment to various hooks in a kernel module, however, everything is flattened into a single test. This makes it impossible to run or skip test cases selectively. Isolate each BPF program into a separate subtest. This is done by disabling auto-loading of programs and loading and testing each program separately. At the same time, modernize the test to use ASSERT* instead of CHECK and replace `return` by `goto cleanup` where necessary. Signed-off-by: Viktor Malik <vmalik@redhat.com> Link: https://lore.kernel.org/r/20260225120904.1529112-1-vmalik@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_core_read.h>
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#include "../test_kmods/bpf_testmod.h"
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__u32 sz = 0;
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SEC("?raw_tp/bpf_testmod_test_read")
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int BPF_PROG(handle_raw_tp,
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struct task_struct *task, struct bpf_testmod_test_read_ctx *read_ctx)
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{
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sz = BPF_CORE_READ(read_ctx, len);
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return 0;
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}
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SEC("?raw_tp/bpf_testmod_test_write_bare_tp")
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int BPF_PROG(handle_raw_tp_bare,
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struct task_struct *task, struct bpf_testmod_test_write_ctx *write_ctx)
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{
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sz = BPF_CORE_READ(write_ctx, len);
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return 0;
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}
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int raw_tp_writable_bare_in_val = 0;
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int raw_tp_writable_bare_early_ret = 0;
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int raw_tp_writable_bare_out_val = 0;
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SEC("?raw_tp.w/bpf_testmod_test_writable_bare_tp")
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int BPF_PROG(handle_raw_tp_writable_bare,
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struct bpf_testmod_test_writable_ctx *writable)
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{
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raw_tp_writable_bare_in_val = writable->val;
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writable->early_ret = raw_tp_writable_bare_early_ret;
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writable->val = raw_tp_writable_bare_out_val;
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return 0;
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}
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SEC("?tp_btf/bpf_testmod_test_read")
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int BPF_PROG(handle_tp_btf,
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struct task_struct *task, struct bpf_testmod_test_read_ctx *read_ctx)
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{
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sz = read_ctx->len;
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return 0;
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}
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SEC("?fentry/bpf_testmod_test_read")
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int BPF_PROG(handle_fentry,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
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{
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sz = len;
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return 0;
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}
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SEC("?fentry")
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int BPF_PROG(handle_fentry_manual,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
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{
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sz = len;
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return 0;
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}
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SEC("?fentry/bpf_testmod:bpf_testmod_test_read")
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int BPF_PROG(handle_fentry_explicit,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
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{
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sz = len;
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return 0;
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}
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SEC("?fentry")
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int BPF_PROG(handle_fentry_explicit_manual,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
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{
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sz = len;
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return 0;
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}
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int retval = 0;
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SEC("?fexit/bpf_testmod_test_read")
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int BPF_PROG(handle_fexit,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len,
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int ret)
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{
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sz = len;
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retval = ret;
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return 0;
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}
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SEC("?fexit/bpf_testmod_return_ptr")
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int BPF_PROG(handle_fexit_ret, int arg, struct file *ret)
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{
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long buf = 0;
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bpf_probe_read_kernel(&buf, 8, ret);
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bpf_probe_read_kernel(&buf, 8, (char *)ret + 256);
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*(volatile int *)ret;
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*(volatile int *)&ret->f_mode;
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return 0;
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}
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SEC("?fmod_ret/bpf_testmod_test_read")
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int BPF_PROG(handle_fmod_ret,
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struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
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{
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sz = len;
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return 0; /* don't override the exit code */
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}
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SEC("?kprobe.multi/bpf_testmod_test_read")
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int BPF_PROG(kprobe_multi)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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