Resguardo inicial

linux-7.2.3/fs/cachefiles/error_inject.c

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+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Error injection handling.
+ *
+ * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/sysctl.h>
+#include "internal.h"
+
+unsigned int cachefiles_error_injection_state;
+
+static struct ctl_table_header *cachefiles_sysctl;
+static const struct ctl_table cachefiles_sysctls[] = {
+	{
+		.procname	= "error_injection",
+		.data		= &cachefiles_error_injection_state,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_douintvec,
+	},
+};
+
+int __init cachefiles_register_error_injection(void)
+{
+	cachefiles_sysctl = register_sysctl("cachefiles", cachefiles_sysctls);
+	if (!cachefiles_sysctl)
+		return -ENOMEM;
+	return 0;
+
+}
+
+void cachefiles_unregister_error_injection(void)
+{
+	unregister_sysctl_table(cachefiles_sysctl);
+}