linux/fs/xfs/xfs_sysctl.h
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   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
  27typedef struct xfs_sysctl_val {
  28        int min;
  29        int val;
  30        int max;
  31} xfs_sysctl_val_t;
  32
  33typedef 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_sysctl_val_t eofb_timer;    /* Interval between eofb scan wakeups */
  51} xfs_param_t;
  52
  53/*
  54 * xfs_error_level:
  55 *
  56 * How much error reporting will be done when internal problems are
  57 * encountered.  These problems normally return an EFSCORRUPTED to their
  58 * caller, with no other information reported.
  59 *
  60 * 0    No error reports
  61 * 1    Report EFSCORRUPTED errors that will cause a filesystem shutdown
  62 * 5    Report all EFSCORRUPTED errors (all of the above errors, plus any
  63 *      additional errors that are known to not cause shutdowns)
  64 *
  65 * xfs_panic_mask bit 0x8 turns the error reports into panics
  66 */
  67
  68enum {
  69        /* XFS_REFCACHE_SIZE = 1 */
  70        /* XFS_REFCACHE_PURGE = 2 */
  71        /* XFS_RESTRICT_CHOWN = 3 */
  72        XFS_SGID_INHERIT = 4,
  73        XFS_SYMLINK_MODE = 5,
  74        XFS_PANIC_MASK = 6,
  75        XFS_ERRLEVEL = 7,
  76        XFS_SYNCD_TIMER = 8,
  77        /* XFS_PROBE_DMAPI = 9 */
  78        /* XFS_PROBE_IOOPS = 10 */
  79        /* XFS_PROBE_QUOTA = 11 */
  80        XFS_STATS_CLEAR = 12,
  81        XFS_INHERIT_SYNC = 13,
  82        XFS_INHERIT_NODUMP = 14,
  83        XFS_INHERIT_NOATIME = 15,
  84        XFS_BUF_TIMER = 16,
  85        XFS_BUF_AGE = 17,
  86        /* XFS_IO_BYPASS = 18 */
  87        XFS_INHERIT_NOSYM = 19,
  88        XFS_ROTORSTEP = 20,
  89        XFS_INHERIT_NODFRG = 21,
  90        XFS_FILESTREAM_TIMER = 22,
  91};
  92
  93extern xfs_param_t      xfs_params;
  94
  95#ifdef CONFIG_SYSCTL
  96extern int xfs_sysctl_register(void);
  97extern void xfs_sysctl_unregister(void);
  98#else
  99# define xfs_sysctl_register()          (0)
 100# define xfs_sysctl_unregister()        do { } while (0)
 101#endif /* CONFIG_SYSCTL */
 102
 103#endif /* __XFS_SYSCTL_H__ */
 104
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