change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/lib/test_sysctl.c
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@@ -16,7 +16,7 @@
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  */
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 /*
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- * This module provides an interface to the the proc sysctl interfaces.  This
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+ * This module provides an interface to the proc sysctl interfaces.  This
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  * driver requires CONFIG_PROC_SYSCTL. It will not normally be loaded by the
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  * system unless explicitly requested by name. You can also build this driver
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  * into your kernel.
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@@ -44,9 +44,14 @@
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 	int int_0002;
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 	int int_0003[4];
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+	int boot_int;
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+
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 	unsigned int uint_0001;
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 	char string_0001[65];
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+
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+#define SYSCTL_TEST_BITMAP_SIZE	65536
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+	unsigned long *bitmap_0001;
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 };
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 static struct test_sysctl_data test_data = {
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@@ -57,6 +62,8 @@
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 	.int_0003[1] = 1,
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 	.int_0003[2] = 2,
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 	.int_0003[3] = 3,
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+
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+	.boot_int = 0,
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 	.uint_0001 = 314,
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@@ -89,6 +96,15 @@
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 		.proc_handler	= proc_dointvec,
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 	},
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 	{
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+		.procname	= "boot_int",
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+		.data		= &test_data.boot_int,
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+		.maxlen		= sizeof(test_data.boot_int),
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+		.mode		= 0644,
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+		.proc_handler	= proc_dointvec,
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+		.extra1		= SYSCTL_ZERO,
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+		.extra2         = SYSCTL_ONE,
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+	},
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+	{
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 		.procname	= "uint_0001",
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 		.data		= &test_data.uint_0001,
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 		.maxlen		= sizeof(unsigned int),
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@@ -101,6 +117,13 @@
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 		.maxlen		= sizeof(test_data.string_0001),
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 		.mode		= 0644,
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 		.proc_handler	= proc_dostring,
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+	},
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+	{
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+		.procname	= "bitmap_0001",
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+		.data		= &test_data.bitmap_0001,
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+		.maxlen		= SYSCTL_TEST_BITMAP_SIZE,
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+		.mode		= 0644,
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+		.proc_handler	= proc_do_large_bitmap,
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 	},
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 	{ }
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 };
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@@ -129,15 +152,21 @@
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 static int __init test_sysctl_init(void)
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 {
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-	test_sysctl_header = register_sysctl_table(test_sysctl_root_table);
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-	if (!test_sysctl_header)
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+	test_data.bitmap_0001 = kzalloc(SYSCTL_TEST_BITMAP_SIZE/8, GFP_KERNEL);
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+	if (!test_data.bitmap_0001)
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 		return -ENOMEM;
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+	test_sysctl_header = register_sysctl_table(test_sysctl_root_table);
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+	if (!test_sysctl_header) {
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+		kfree(test_data.bitmap_0001);
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+		return -ENOMEM;
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+	}
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 	return 0;
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 }
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-late_initcall(test_sysctl_init);
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+module_init(test_sysctl_init);
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 static void __exit test_sysctl_exit(void)
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 {
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+	kfree(test_data.bitmap_0001);
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 	if (test_sysctl_header)
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 		unregister_sysctl_table(test_sysctl_header);
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 }