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 sgid_inherit;  /* Inherit S_ISGID if process' GID is
  35                                          * not a member of parent dir GID. */
  36         xfs_sysctl_val_t symlink_mode;  /* Link creat mode affected by umask */
  37         xfs_sysctl_val_t panic_mask;    /* bitmask to cause panic on errors. */
  38         xfs_sysctl_val_t error_level;   /* Degree of reporting for problems  */
  39         xfs_sysctl_val_t syncd_timer;   /* Interval between xfssyncd wakeups */
  40         xfs_sysctl_val_t stats_clear;   /* Reset all XFS statistics to zero. */
  41         xfs_sysctl_val_t inherit_sync;  /* Inherit the "sync" inode flag. */
  42         xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
  43         xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
  44         xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
  45         xfs_sysctl_val_t xfs_buf_age;   /* Metadata buffer age before flush. */
  46         xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
  47         xfs_sysctl_val_t rotorstep;     /* inode32 AG rotoring control knob */
  48         xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
  49         xfs_sysctl_val_t fstrm_timer;   /* Filestream dir-AG assoc'n timeout. */
  50 } xfs_param_t;
  51
  52 /*
  53  * xfs_error_level:
  54  *
  55  * How much error reporting will be done when internal problems are
  56  * encountered.  These problems normally return an EFSCORRUPTED to their
  57  * caller, with no other information reported.
  58  *
  59  * 0    No error reports
  60  * 1    Report EFSCORRUPTED errors that will cause a filesystem shutdown
  61  * 5    Report all EFSCORRUPTED errors (all of the above errors, plus any
  62  *      additional errors that are known to not cause shutdowns)
  63  *
  64  * xfs_panic_mask bit 0x8 turns the error reports into panics
  65  */
  66
  67 enum {
  68         /* XFS_REFCACHE_SIZE = 1 */
  69         /* XFS_REFCACHE_PURGE = 2 */
  70         /* XFS_RESTRICT_CHOWN = 3 */
  71         XFS_SGID_INHERIT = 4,
  72         XFS_SYMLINK_MODE = 5,
  73         XFS_PANIC_MASK = 6,
  74         XFS_ERRLEVEL = 7,
  75         XFS_SYNCD_TIMER = 8,
  76         /* XFS_PROBE_DMAPI = 9 */
  77         /* XFS_PROBE_IOOPS = 10 */
  78         /* XFS_PROBE_QUOTA = 11 */
  79         XFS_STATS_CLEAR = 12,
  80         XFS_INHERIT_SYNC = 13,
  81         XFS_INHERIT_NODUMP = 14,
  82         XFS_INHERIT_NOATIME = 15,
  83         XFS_BUF_TIMER = 16,
  84         XFS_BUF_AGE = 17,
  85         /* XFS_IO_BYPASS = 18 */
  86         XFS_INHERIT_NOSYM = 19,
  87         XFS_ROTORSTEP = 20,
  88         XFS_INHERIT_NODFRG = 21,
  89         XFS_FILESTREAM_TIMER = 22,
  90 };
  91
  92 extern xfs_param_t      xfs_params;
  93
  94 #ifdef CONFIG_SYSCTL
  95 extern int xfs_sysctl_register(void);
  96 extern void xfs_sysctl_unregister(void);
  97 #else
  98 # define xfs_sysctl_register()          (0)
  99 # define xfs_sysctl_unregister()        do { } while (0)
 100 #endif /* CONFIG_SYSCTL */
 101
 102 #endif /* __XFS_SYSCTL_H__ */