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__ */