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 blockgc_timer;	/* Interval between blockgc scans */
39} xfs_param_t;
40
41/*
42 * xfs_error_level:
43 *
44 * How much error reporting will be done when internal problems are
45 * encountered.  These problems normally return an EFSCORRUPTED to their
46 * caller, with no other information reported.
47 *
48 * 0	No error reports
49 * 1	Report EFSCORRUPTED errors that will cause a filesystem shutdown
50 * 5	Report all EFSCORRUPTED errors (all of the above errors, plus any
51 *	additional errors that are known to not cause shutdowns)
52 *
53 * xfs_panic_mask bit 0x8 turns the error reports into panics
54 */
55
56enum {
57	/* XFS_REFCACHE_SIZE = 1 */
58	/* XFS_REFCACHE_PURGE = 2 */
59	/* XFS_RESTRICT_CHOWN = 3 */
60	XFS_SGID_INHERIT = 4,
61	XFS_SYMLINK_MODE = 5,
62	XFS_PANIC_MASK = 6,
63	XFS_ERRLEVEL = 7,
64	XFS_SYNCD_TIMER = 8,
65	/* XFS_PROBE_DMAPI = 9 */
66	/* XFS_PROBE_IOOPS = 10 */
67	/* XFS_PROBE_QUOTA = 11 */
68	XFS_STATS_CLEAR = 12,
69	XFS_INHERIT_SYNC = 13,
70	XFS_INHERIT_NODUMP = 14,
71	XFS_INHERIT_NOATIME = 15,
72	XFS_BUF_TIMER = 16,
73	XFS_BUF_AGE = 17,
74	/* XFS_IO_BYPASS = 18 */
75	XFS_INHERIT_NOSYM = 19,
76	XFS_ROTORSTEP = 20,
77	XFS_INHERIT_NODFRG = 21,
78	XFS_FILESTREAM_TIMER = 22,
79};
80
81extern xfs_param_t	xfs_params;
82
83struct xfs_globals {
84#ifdef DEBUG
85	int	pwork_threads;		/* parallel workqueue threads */
86	bool	larp;			/* log attribute replay */
87#endif
88	int	bload_leaf_slack;	/* btree bulk load leaf slack */
89	int	bload_node_slack;	/* btree bulk load node slack */
90	int	log_recovery_delay;	/* log recovery delay (secs) */
91	int	mount_delay;		/* mount setup delay (secs) */
92	bool	bug_on_assert;		/* BUG() the kernel on assert failure */
93	bool	always_cow;		/* use COW fork for all overwrites */
94};
95extern struct xfs_globals	xfs_globals;
96
97#ifdef CONFIG_SYSCTL
98extern int xfs_sysctl_register(void);
99extern void xfs_sysctl_unregister(void);
100#else
101# define xfs_sysctl_register()		(0)
102# define xfs_sysctl_unregister()	do { } while (0)
103#endif /* CONFIG_SYSCTL */
104
105#endif /* __XFS_SYSCTL_H__ */
106