fs/xfs/linux-2.6/xfs_sysctl.h

   1 /*
   2  * Copyright (c) 2001-2004 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 #ifndef __XFS_SYSCTL_H__
  34 #define __XFS_SYSCTL_H__
  35
  36 #include <linux/sysctl.h>
  37
  38 /*
  39  * Tunable xfs parameters
  40  */
  41
  42 typedef struct xfs_sysctl_val {
  43         int min;
  44         int val;
  45         int max;
  46 } xfs_sysctl_val_t;
  47
  48 typedef struct xfs_param {
  49         xfs_sysctl_val_t restrict_chown;/* Root/non-root can give away files.*/
  50         xfs_sysctl_val_t sgid_inherit;  /* Inherit S_ISGID if process' GID is
  51                                          * not a member of parent dir GID. */
  52         xfs_sysctl_val_t symlink_mode;  /* Link creat mode affected by umask */
  53         xfs_sysctl_val_t panic_mask;    /* bitmask to cause panic on errors. */
  54         xfs_sysctl_val_t error_level;   /* Degree of reporting for problems  */
  55         xfs_sysctl_val_t syncd_timer;   /* Interval between xfssyncd wakeups */
  56         xfs_sysctl_val_t stats_clear;   /* Reset all XFS statistics to zero. */
  57         xfs_sysctl_val_t inherit_sync;  /* Inherit the "sync" inode flag. */
  58         xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
  59         xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
  60         xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
  61         xfs_sysctl_val_t xfs_buf_age;   /* Metadata buffer age before flush. */
  62         xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
  63         xfs_sysctl_val_t rotorstep;     /* inode32 AG rotoring control knob */
  64 } xfs_param_t;
  65
  66 /*
  67  * xfs_error_level:
  68  *
  69  * How much error reporting will be done when internal problems are
  70  * encountered.  These problems normally return an EFSCORRUPTED to their
  71  * caller, with no other information reported.
  72  *
  73  * 0    No error reports
  74  * 1    Report EFSCORRUPTED errors that will cause a filesystem shutdown
  75  * 5    Report all EFSCORRUPTED errors (all of the above errors, plus any
  76  *      additional errors that are known to not cause shutdowns)
  77  *
  78  * xfs_panic_mask bit 0x8 turns the error reports into panics
  79  */
  80
  81 enum {
  82         /* XFS_REFCACHE_SIZE = 1 */
  83         /* XFS_REFCACHE_PURGE = 2 */
  84         XFS_RESTRICT_CHOWN = 3,
  85         XFS_SGID_INHERIT = 4,
  86         XFS_SYMLINK_MODE = 5,
  87         XFS_PANIC_MASK = 6,
  88         XFS_ERRLEVEL = 7,
  89         XFS_SYNCD_TIMER = 8,
  90         /* XFS_PROBE_DMAPI = 9 */
  91         /* XFS_PROBE_IOOPS = 10 */
  92         /* XFS_PROBE_QUOTA = 11 */
  93         XFS_STATS_CLEAR = 12,
  94         XFS_INHERIT_SYNC = 13,
  95         XFS_INHERIT_NODUMP = 14,
  96         XFS_INHERIT_NOATIME = 15,
  97         XFS_BUF_TIMER = 16,
  98         XFS_BUF_AGE = 17,
  99         /* XFS_IO_BYPASS = 18 */
 100         XFS_INHERIT_NOSYM = 19,
 101         XFS_ROTORSTEP = 20,
 102 };
 103
 104 extern xfs_param_t      xfs_params;
 105
 106 #ifdef CONFIG_SYSCTL
 107 extern void xfs_sysctl_register(void);
 108 extern void xfs_sysctl_unregister(void);
 109 #else
 110 # define xfs_sysctl_register()          do { } while (0)
 111 # define xfs_sysctl_unregister()        do { } while (0)
 112 #endif /* CONFIG_SYSCTL */
 113
 114 #endif /* __XFS_SYSCTL_H__ */