Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *	      the Linux-NTFS project. Adapted from the old NTFS driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *	      Copyright (C) 1997 Martin von Löwis, Régis Duchesne
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (c) 2002-2005 Anton Altaparmakov
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "sysctl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* Definition of the ntfs sysctl. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static struct ctl_table ntfs_sysctls[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		.procname	= "ntfs-debug",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		.data		= &debug_msgs,		/* Data pointer and size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		.maxlen		= sizeof(debug_msgs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		.mode		= 0644,			/* Mode, proc handler. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		.proc_handler	= proc_dointvec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* Define the parent directory /proc/sys/fs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct ctl_table sysctls_root[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		.procname	= "fs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		.mode		= 0555,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		.child		= ntfs_sysctls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Storage for the sysctls header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct ctl_table_header *sysctls_root_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  * ntfs_sysctl - add or remove the debug sysctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  * @add:	add (1) or remove (0) the sysctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)  * Add or remove the debug sysctl. Return 0 on success or -errno on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int ntfs_sysctl(int add)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	if (add) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		BUG_ON(sysctls_root_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		sysctls_root_table = register_sysctl_table(sysctls_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		if (!sysctls_root_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		BUG_ON(!sysctls_root_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		unregister_sysctl_table(sysctls_root_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		sysctls_root_table = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #endif /* CONFIG_SYSCTL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif /* DEBUG */