// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include <linux/error-injection.h> #include <linux/init.h> #include <linux/module.h> #include <linux/sysfs.h> #include <linux/tracepoint.h> #include "bpf_testmod.h" #define CREATE_TRACE_POINTS #include "bpf_testmod-events.h" noinline ssize_t bpf_testmod_test_read(struct file *file, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len) { struct bpf_testmod_test_read_ctx ctx = { .buf = buf, .off = off, .len = len, }; trace_bpf_testmod_test_read(current, &ctx); return -EIO; /* always fail */ } EXPORT_SYMBOL(bpf_testmod_test_read); ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO); static struct bin_attribute bin_attr_bpf_testmod_file __ro_after_init = { .attr = { .name = "bpf_testmod", .mode = 0444, }, .read = bpf_testmod_test_read, }; static int bpf_testmod_init(void) { return sysfs_create_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); } static void bpf_testmod_exit(void) { return sysfs_remove_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); } module_init(bpf_testmod_init); module_exit(bpf_testmod_exit); MODULE_AUTHOR("Andrii Nakryiko"); MODULE_DESCRIPTION("BPF selftests module"); MODULE_LICENSE("Dual BSD/GPL");