fs/xfs/linux-2.6/xfs_sysctl.h

   1 /*
   2  * Copyright (c) 2001-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_SYSCTL_H__
  19 #define __XFS_SYSCTL_H__
  20
  21 #include <linux/sysctl.h>
  22
  23 /*
  24  * Tunable xfs parameters
  25  */
  26
  27 typedef struct xfs_sysctl_val {
  28         int min;
  29         int val;
  30         int max;
  31 } xfs_sysctl_val_t;
  32
  33 typedef struct xfs_param {
  34         xfs_sysctl_val_t restrict_chown;/* Root/non-root can give away files.*/
  35         xfs_sysctl_val_t sgid_inherit;  /* Inherit S_ISGID if process' GID is
  36                                          * not a member of parent dir GID. */
  37         xfs_sysctl_val_t symlink_mode;  /* Link creat mode affected by umask */
  38         xfs_sysctl_val_t panic_mask;    /* bitmask to cause panic on errors. */
  39         xfs_sysctl_val_t error_level;   /* Degree of reporting for problems  */
  40         xfs_sysctl_val_t syncd_timer;   /* Interval between xfssyncd wakeups */
  41         xfs_sysctl_val_t stats_clear;   /* Reset all XFS statistics to zero. */
  42         xfs_sysctl_val_t inherit_sync;  /* Inherit the "sync" inode flag. */
  43         xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
  44         xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
  45         xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
  46         xfs_sysctl_val_t xfs_buf_age;   /* Metadata buffer age before flush. */
  47         xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
  48         xfs_sysctl_val_t rotorstep;     /* inode32 AG rotoring control knob */
  49 } xfs_param_t;
  50
  51 /*
  52  * xfs_error_level:
  53  *
  54  * How much error reporting will be done when internal problems are
  55  * encountered.  These problems normally return an EFSCORRUPTED to their
  56  * caller, with no other information reported.
  57  *
  58  * 0    No error reports
  59  * 1    Report EFSCORRUPTED errors that will cause a filesystem shutdown
  60  * 5    Report all EFSCORRUPTED errors (all of the above errors, plus any
  61  *      additional errors that are known to not cause shutdowns)
  62  *
  63  * xfs_panic_mask bit 0x8 turns the error reports into panics
  64  */
  65
  66 enum {
  67         /* XFS_REFCACHE_SIZE = 1 */
  68         /* XFS_REFCACHE_PURGE = 2 */
  69         XFS_RESTRICT_CHOWN = 3,
  70         XFS_SGID_INHERIT = 4,
  71         XFS_SYMLINK_MODE = 5,
  72         XFS_PANIC_MASK = 6,
  73         XFS_ERRLEVEL = 7,
  74         XFS_SYNCD_TIMER = 8,
  75         /* XFS_PROBE_DMAPI = 9 */
  76         /* XFS_PROBE_IOOPS = 10 */
  77         /* XFS_PROBE_QUOTA = 11 */
  78         XFS_STATS_CLEAR = 12,
  79         XFS_INHERIT_SYNC = 13,
  80         XFS_INHERIT_NODUMP = 14,
  81         XFS_INHERIT_NOATIME = 15,
  82         XFS_BUF_TIMER = 16,
  83         XFS_BUF_AGE = 17,
  84         /* XFS_IO_BYPASS = 18 */
  85         XFS_INHERIT_NOSYM = 19,
  86         XFS_ROTORSTEP = 20,
  87 };
  88
  89 extern xfs_param_t      xfs_params;
  90
  91 #ifdef CONFIG_SYSCTL
  92 extern void xfs_sysctl_register(void);
  93 extern void xfs_sysctl_unregister(void);
  94 #else
  95 # define xfs_sysctl_register()          do { } while (0)
  96 # define xfs_sysctl_unregister()        do { } while (0)
  97 #endif /* CONFIG_SYSCTL */
  98
  99 #endif /* __XFS_SYSCTL_H__ */