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 	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 };
89 extern struct xfs_globals	xfs_globals;
90 
91 #ifdef CONFIG_SYSCTL
92 extern int xfs_sysctl_register(void);
93 extern void xfs_sysctl_unregister(void);
94 #else
95 # define xfs_sysctl_register()		(0)
96 # define xfs_sysctl_unregister()	do { } while (0)
97 #endif /* CONFIG_SYSCTL */
98 
99 #endif /* __XFS_SYSCTL_H__ */
100