1 /*
2 * Copyright (c) 2001-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #ifndef __XFS_SYSCTL_H__
19 #define __XFS_SYSCTL_H__
20
21 #include <linux/sysctl.h>
22
23 /*
24 * Tunable xfs parameters
25 */
26
27 typedef struct xfs_sysctl_val {
28 int min;
29 int val;
30 int max;
31 } xfs_sysctl_val_t;
32
33 typedef struct xfs_param {
34 xfs_sysctl_val_t restrict_chown;/* Root/non-root can give away files.*/
35 xfs_sysctl_val_t sgid_inherit; /* Inherit S_ISGID if process' GID is
36 * not a member of parent dir GID. */
37 xfs_sysctl_val_t symlink_mode; /* Link creat mode affected by umask */
38 xfs_sysctl_val_t panic_mask; /* bitmask to cause panic on errors. */
39 xfs_sysctl_val_t error_level; /* Degree of reporting for problems */
40 xfs_sysctl_val_t syncd_timer; /* Interval between xfssyncd wakeups */
41 xfs_sysctl_val_t stats_clear; /* Reset all XFS statistics to zero. */
42 xfs_sysctl_val_t inherit_sync; /* Inherit the "sync" inode flag. */
43 xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
44 xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
45 xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
46 xfs_sysctl_val_t xfs_buf_age; /* Metadata buffer age before flush. */
47 xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
48 xfs_sysctl_val_t rotorstep; /* inode32 AG rotoring control knob */
49 xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
50 xfs_sysctl_val_t fstrm_timer; /* Filestream dir-AG assoc'n timeout. */
51 } xfs_param_t;
52
53 /*
54 * xfs_error_level:
55 *
56 * How much error reporting will be done when internal problems are
57 * encountered. These problems normally return an EFSCORRUPTED to their
58 * caller, with no other information reported.
59 *
60 * 0 No error reports
61 * 1 Report EFSCORRUPTED errors that will cause a filesystem shutdown
62 * 5 Report all EFSCORRUPTED errors (all of the above errors, plus any
63 * additional errors that are known to not cause shutdowns)
64 *
65 * xfs_panic_mask bit 0x8 turns the error reports into panics
66 */
67
68 enum {
69 /* XFS_REFCACHE_SIZE = 1 */
70 /* XFS_REFCACHE_PURGE = 2 */
71 XFS_RESTRICT_CHOWN = 3,
72 XFS_SGID_INHERIT = 4,
73 XFS_SYMLINK_MODE = 5,
74 XFS_PANIC_MASK = 6,
75 XFS_ERRLEVEL = 7,
76 XFS_SYNCD_TIMER = 8,
77 /* XFS_PROBE_DMAPI = 9 */
78 /* XFS_PROBE_IOOPS = 10 */
79 /* XFS_PROBE_QUOTA = 11 */
80 XFS_STATS_CLEAR = 12,
81 XFS_INHERIT_SYNC = 13,
82 XFS_INHERIT_NODUMP = 14,
83 XFS_INHERIT_NOATIME = 15,
84 XFS_BUF_TIMER = 16,
85 XFS_BUF_AGE = 17,
86 /* XFS_IO_BYPASS = 18 */
87 XFS_INHERIT_NOSYM = 19,
88 XFS_ROTORSTEP = 20,
89 XFS_INHERIT_NODFRG = 21,
90 XFS_FILESTREAM_TIMER = 22,
91 };
92
93 extern xfs_param_t xfs_params;
94
95 #ifdef CONFIG_SYSCTL
96 extern void xfs_sysctl_register(void);
97 extern void xfs_sysctl_unregister(void);
98 #else
99 # define xfs_sysctl_register() do { } while (0)
100 # define xfs_sysctl_unregister() do { } while (0)
101 #endif /* CONFIG_SYSCTL */
102
103 #endif /* __XFS_SYSCTL_H__ */
104
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