79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Copyright 2023 Red Hat, Inc. and/or its affiliates
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* and other contributors as indicated by the @author tags.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* https://github.com/torvalds/linux/blob/master/crypto/fips.c
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* https://pointer-overloading.blogspot.com/2013/09/linux-creating-entry-in-proc-file.html
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*/
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#include <linux/module.h>
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#include <linux/sysctl.h>
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#include <linux/version.h>
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int fips_enabled = 1;
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static struct ctl_table crypto_sysctl_table[] = {
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{
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.procname = "fips_enabled",
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.data = &fips_enabled,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = proc_dointvec
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},
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{}
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};
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static struct ctl_table crypto_dir_table[] = {
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{
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.procname = "crypto",
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.mode = 0555,
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0))
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.child = crypto_sysctl_table
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#endif
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},
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{}
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};
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static struct ctl_table_header *crypto_sysctls;
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static void crypto_proc_fips_init(void)
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{
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0))
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crypto_sysctls = register_sysctl_table(crypto_dir_table);
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#else
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crypto_sysctls = register_sysctl(crypto_dir_table->procname, crypto_sysctl_table);
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#endif
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}
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static void crypto_proc_fips_exit(void)
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{
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unregister_sysctl_table(crypto_sysctls);
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}
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static int __init fips_init(void)
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{
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crypto_proc_fips_init();
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return 0;
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}
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static void __exit fips_exit(void)
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{
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crypto_proc_fips_exit();
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}
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MODULE_LICENSE("GPL");
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subsys_initcall(fips_init);
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module_exit(fips_exit);
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