LXR linux/fs/xfs/xfs

   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
  15typedef struct xfs_sysctl_val {
  16        int min;
  17        int val;
  18        int max;
  19} xfs_sysctl_val_t;
  20
  21typedef 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
  57enum {
  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
  82extern xfs_param_t      xfs_params;
  83
  84struct 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};
  93extern struct xfs_globals       xfs_globals;
  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