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74 lines
1.8 KiB
74 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright (c) 2020 Facebook */ |
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#include <linux/error-injection.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/percpu-defs.h> |
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#include <linux/sysfs.h> |
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#include <linux/tracepoint.h> |
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#include "bpf_testmod.h" |
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#define CREATE_TRACE_POINTS |
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#include "bpf_testmod-events.h" |
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DEFINE_PER_CPU(int, bpf_testmod_ksym_percpu) = 123; |
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noinline ssize_t |
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bpf_testmod_test_read(struct file *file, struct kobject *kobj, |
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struct bin_attribute *bin_attr, |
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char *buf, loff_t off, size_t len) |
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{ |
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struct bpf_testmod_test_read_ctx ctx = { |
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.buf = buf, |
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.off = off, |
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.len = len, |
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}; |
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trace_bpf_testmod_test_read(current, &ctx); |
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return -EIO; /* always fail */ |
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} |
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EXPORT_SYMBOL(bpf_testmod_test_read); |
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ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO); |
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noinline ssize_t |
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bpf_testmod_test_write(struct file *file, struct kobject *kobj, |
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struct bin_attribute *bin_attr, |
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char *buf, loff_t off, size_t len) |
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{ |
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struct bpf_testmod_test_write_ctx ctx = { |
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.buf = buf, |
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.off = off, |
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.len = len, |
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}; |
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trace_bpf_testmod_test_write_bare(current, &ctx); |
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return -EIO; /* always fail */ |
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} |
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EXPORT_SYMBOL(bpf_testmod_test_write); |
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ALLOW_ERROR_INJECTION(bpf_testmod_test_write, ERRNO); |
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static struct bin_attribute bin_attr_bpf_testmod_file __ro_after_init = { |
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.attr = { .name = "bpf_testmod", .mode = 0666, }, |
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.read = bpf_testmod_test_read, |
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.write = bpf_testmod_test_write, |
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}; |
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static int bpf_testmod_init(void) |
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{ |
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return sysfs_create_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); |
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} |
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static void bpf_testmod_exit(void) |
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{ |
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return sysfs_remove_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); |
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} |
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module_init(bpf_testmod_init); |
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module_exit(bpf_testmod_exit); |
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MODULE_AUTHOR("Andrii Nakryiko"); |
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MODULE_DESCRIPTION("BPF selftests module"); |
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MODULE_LICENSE("Dual BSD/GPL"); |
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