fs/xfs/linux/xfs_sysctl.c

   1 /*
   2  * Copyright (c) 2001-2002 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include "xfs.h"
  34 #include "xfs_rw.h"
  35 #include <linux/sysctl.h>
  36 #include <linux/proc_fs.h>
  37
  38
  39 static struct ctl_table_header *xfs_table_header;
  40
  41
  42 #ifdef CONFIG_PROC_FS
  43 STATIC int
  44 xfs_stats_clear_proc_handler(
  45         ctl_table       *ctl,
  46         int             write,
  47         struct file     *filp,
  48         void            *buffer,
  49         size_t          *lenp)
  50 {
  51         int             ret, *valp = ctl->data;
  52         __uint32_t      vn_active;
  53
  54         ret = proc_doulongvec_minmax(ctl, write, filp, buffer, lenp);
  55
  56         if (!ret && write && *valp) {
  57                 printk("XFS Clearing xfsstats\n");
  58                 /* save vn_active, it's a universal truth! */
  59                 vn_active = xfsstats.vn_active;
  60                 memset(&xfsstats, 0, sizeof(xfsstats));
  61                 xfsstats.vn_active = vn_active;
  62                 xfs_stats_clear = 0;
  63         }
  64
  65         return ret;
  66 }
  67 #endif /* CONFIG_PROC_FS */
  68
  69 STATIC ctl_table xfs_table[] = {
  70         {XFS_RESTRICT_CHOWN, "restrict_chown", &xfs_params.restrict_chown.val,
  71         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  72         &sysctl_intvec, NULL,
  73         &xfs_params.restrict_chown.min, &xfs_params.restrict_chown.max},
  74
  75         {XFS_SGID_INHERIT, "irix_sgid_inherit", &xfs_params.sgid_inherit.val,
  76         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  77         &sysctl_intvec, NULL,
  78         &xfs_params.sgid_inherit.min, &xfs_params.sgid_inherit.max},
  79
  80         {XFS_SYMLINK_MODE, "irix_symlink_mode", &xfs_params.symlink_mode.val,
  81         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  82         &sysctl_intvec, NULL,
  83         &xfs_params.symlink_mode.min, &xfs_params.symlink_mode.max},
  84
  85         {XFS_PANIC_MASK, "panic_mask", &xfs_params.panic_mask.val,
  86         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  87         &sysctl_intvec, NULL,
  88         &xfs_params.panic_mask.min, &xfs_params.panic_mask.max},
  89
  90         {XFS_ERRLEVEL, "error_level", &xfs_params.error_level.val,
  91         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  92         &sysctl_intvec, NULL,
  93         &xfs_params.error_level.min, &xfs_params.error_level.max},
  94
  95         {XFS_SYNC_INTERVAL, "sync_interval", &xfs_params.sync_interval.val,
  96         sizeof(ulong), 0644, NULL, &proc_doulongvec_minmax,
  97         &sysctl_intvec, NULL,
  98         &xfs_params.sync_interval.min, &xfs_params.sync_interval.max},
  99
 100         /* please keep this the last entry */
 101 #ifdef CONFIG_PROC_FS
 102         {XFS_STATS_CLEAR, "stats_clear", &xfs_params.stats_clear.val,
 103         sizeof(ulong), 0644, NULL, &xfs_stats_clear_proc_handler,
 104         &sysctl_intvec, NULL,
 105         &xfs_params.stats_clear.min, &xfs_params.stats_clear.max},
 106 #endif /* CONFIG_PROC_FS */
 107
 108         {0}
 109 };
 110
 111 STATIC ctl_table xfs_dir_table[] = {
 112         {FS_XFS, "xfs", NULL, 0, 0555, xfs_table},
 113         {0}
 114 };
 115
 116 STATIC ctl_table xfs_root_table[] = {
 117         {CTL_FS, "fs",  NULL, 0, 0555, xfs_dir_table},
 118         {0}
 119 };
 120
 121 void
 122 xfs_sysctl_register(void)
 123 {
 124         xfs_table_header = register_sysctl_table(xfs_root_table, 1);
 125 }
 126
 127 void
 128 xfs_sysctl_unregister(void)
 129 {
 130         if (xfs_table_header)
 131                 unregister_sysctl_table(xfs_table_header);
 132 }