fs/xfs/xfs_sysctl.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2001-2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_SYSCTL_H__
   7 #define __XFS_SYSCTL_H__
   8
   9 #include <linux/sysctl.h>
  10
  11 /*
  12  * Tunable xfs parameters
  13  */
  14
  15 typedef struct xfs_sysctl_val {
  16         int min;
  17         int val;
  18         int max;
  19 } xfs_sysctl_val_t;
  20
  21 typedef struct xfs_param {
  22         xfs_sysctl_val_t sgid_inherit;  /* Inherit S_ISGID if process' GID is
  23                                          * not a member of parent dir GID. */
  24         xfs_sysctl_val_t symlink_mode;  /* Link creat mode affected by umask */
  25         xfs_sysctl_val_t panic_mask;    /* bitmask to cause panic on errors. */
  26         xfs_sysctl_val_t error_level;   /* Degree of reporting for problems  */
  27         xfs_sysctl_val_t syncd_timer;   /* Interval between xfssyncd wakeups */
  28         xfs_sysctl_val_t stats_clear;   /* Reset all XFS statistics to zero. */
  29         xfs_sysctl_val_t inherit_sync;  /* Inherit the "sync" inode flag. */
  30         xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
  31         xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
  32         xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
  33         xfs_sysctl_val_t xfs_buf_age;   /* Metadata buffer age before flush. */
  34         xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
  35         xfs_sysctl_val_t rotorstep;     /* inode32 AG rotoring control knob */
  36         xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
  37         xfs_sysctl_val_t fstrm_timer;   /* Filestream dir-AG assoc'n timeout. */
  38         xfs_sysctl_val_t eofb_timer;    /* Interval between eofb scan wakeups */
  39         xfs_sysctl_val_t cowb_timer;    /* Interval between cowb scan wakeups */
  40 } xfs_param_t;
  41
  42 /*
  43  * xfs_error_level:
  44  *
  45  * How much error reporting will be done when internal problems are
  46  * encountered.  These problems normally return an EFSCORRUPTED to their
  47  * caller, with no other information reported.
  48  *
  49  * 0    No error reports
  50  * 1    Report EFSCORRUPTED errors that will cause a filesystem shutdown
  51  * 5    Report all EFSCORRUPTED errors (all of the above errors, plus any
  52  *      additional errors that are known to not cause shutdowns)
  53  *
  54  * xfs_panic_mask bit 0x8 turns the error reports into panics
  55  */
  56
  57 enum {
  58         /* XFS_REFCACHE_SIZE = 1 */
  59         /* XFS_REFCACHE_PURGE = 2 */
  60         /* XFS_RESTRICT_CHOWN = 3 */
  61         XFS_SGID_INHERIT = 4,
  62         XFS_SYMLINK_MODE = 5,
  63         XFS_PANIC_MASK = 6,
  64         XFS_ERRLEVEL = 7,
  65         XFS_SYNCD_TIMER = 8,
  66         /* XFS_PROBE_DMAPI = 9 */
  67         /* XFS_PROBE_IOOPS = 10 */
  68         /* XFS_PROBE_QUOTA = 11 */
  69         XFS_STATS_CLEAR = 12,
  70         XFS_INHERIT_SYNC = 13,
  71         XFS_INHERIT_NODUMP = 14,
  72         XFS_INHERIT_NOATIME = 15,
  73         XFS_BUF_TIMER = 16,
  74         XFS_BUF_AGE = 17,
  75         /* XFS_IO_BYPASS = 18 */
  76         XFS_INHERIT_NOSYM = 19,
  77         XFS_ROTORSTEP = 20,
  78         XFS_INHERIT_NODFRG = 21,
  79         XFS_FILESTREAM_TIMER = 22,
  80 };
  81
  82 extern xfs_param_t      xfs_params;
  83
  84 struct xfs_globals {
  85 #ifdef DEBUG
  86         int     pwork_threads;          /* parallel workqueue threads */
  87 #endif
  88         int     log_recovery_delay;     /* log recovery delay (secs) */
  89         int     mount_delay;            /* mount setup delay (secs) */
  90         bool    bug_on_assert;          /* BUG() the kernel on assert failure */
  91         bool    always_cow;             /* use COW fork for all overwrites */
  92 };
  93 extern struct xfs_globals       xfs_globals;
  94
  95 #ifdef CONFIG_SYSCTL
  96 extern int xfs_sysctl_register(void);
  97 extern 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__ */