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
 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 panic_mask;	/* bitmask to cause panic on errors. */
 23	xfs_sysctl_val_t error_level;	/* Degree of reporting for problems  */
 24	xfs_sysctl_val_t syncd_timer;	/* Interval between xfssyncd wakeups */
 25	xfs_sysctl_val_t stats_clear;	/* Reset all XFS statistics to zero. */
 26	xfs_sysctl_val_t inherit_sync;	/* Inherit the "sync" inode flag. */
 27	xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
 28	xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
 29	xfs_sysctl_val_t inherit_nosym;	/* Inherit the "nosymlinks" flag. */
 30	xfs_sysctl_val_t rotorstep;	/* inode32 AG rotoring control knob */
 31	xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
 32	xfs_sysctl_val_t fstrm_timer;	/* Filestream dir-AG assoc'n timeout. */
 33	xfs_sysctl_val_t blockgc_timer;	/* Interval between blockgc scans */
 34} xfs_param_t;
 35
 36/*
 37 * xfs_error_level:
 38 *
 39 * How much error reporting will be done when internal problems are
 40 * encountered.  These problems normally return an EFSCORRUPTED to their
 41 * caller, with no other information reported.
 42 *
 43 * 0	No error reports
 44 * 1	Report EFSCORRUPTED errors that will cause a filesystem shutdown
 45 * 5	Report all EFSCORRUPTED errors (all of the above errors, plus any
 46 *	additional errors that are known to not cause shutdowns)
 47 *
 48 * xfs_panic_mask bit 0x8 turns the error reports into panics
 49 */
 50
 51enum {
 52	/* XFS_REFCACHE_SIZE = 1 */
 53	/* XFS_REFCACHE_PURGE = 2 */
 54	/* XFS_RESTRICT_CHOWN = 3 */
 55	XFS_SGID_INHERIT = 4,
 56	XFS_SYMLINK_MODE = 5,
 57	XFS_PANIC_MASK = 6,
 58	XFS_ERRLEVEL = 7,
 59	XFS_SYNCD_TIMER = 8,
 60	/* XFS_PROBE_DMAPI = 9 */
 61	/* XFS_PROBE_IOOPS = 10 */
 62	/* XFS_PROBE_QUOTA = 11 */
 63	XFS_STATS_CLEAR = 12,
 64	XFS_INHERIT_SYNC = 13,
 65	XFS_INHERIT_NODUMP = 14,
 66	XFS_INHERIT_NOATIME = 15,
 67	XFS_BUF_TIMER = 16,
 68	XFS_BUF_AGE = 17,
 69	/* XFS_IO_BYPASS = 18 */
 70	XFS_INHERIT_NOSYM = 19,
 71	XFS_ROTORSTEP = 20,
 72	XFS_INHERIT_NODFRG = 21,
 73	XFS_FILESTREAM_TIMER = 22,
 74};
 75
 76extern xfs_param_t	xfs_params;
 77
 78struct xfs_globals {
 79#ifdef DEBUG
 80	int	pwork_threads;		/* parallel workqueue threads */
 81	bool	larp;			/* log attribute replay */
 82#endif
 83	int	bload_leaf_slack;	/* btree bulk load leaf slack */
 84	int	bload_node_slack;	/* btree bulk load node slack */
 85	int	log_recovery_delay;	/* log recovery delay (secs) */
 86	int	mount_delay;		/* mount setup delay (secs) */
 87	bool	bug_on_assert;		/* BUG() the kernel on assert failure */
 88	bool	always_cow;		/* use COW fork for all overwrites */
 89};
 90extern struct xfs_globals	xfs_globals;
 91
 92#ifdef CONFIG_SYSCTL
 93extern int xfs_sysctl_register(void);
 94extern void xfs_sysctl_unregister(void);
 95#else
 96# define xfs_sysctl_register()		(0)
 97# define xfs_sysctl_unregister()	do { } while (0)
 98#endif /* CONFIG_SYSCTL */
 99
100#endif /* __XFS_SYSCTL_H__ */