2 * linux/fs/nfs/sysctl.c
4 * Sysctl interface to NFS parameters
6 #include <linux/types.h>
7 #include <linux/linkage.h>
8 #include <linux/ctype.h>
10 #include <linux/sysctl.h>
11 #include <linux/module.h>
12 #include <linux/nfs4.h>
13 #include <linux/nfs_idmap.h>
14 #include <linux/nfs_fs.h>
19 static const int nfs_set_port_min = 0;
20 static const int nfs_set_port_max = 65535;
21 static struct ctl_table_header *nfs_callback_sysctl_table;
23 * Something that isn't CTL_ANY, CTL_NONE or a value that may clash.
24 * Use the same values as fs/lockd/svc.c
26 #define CTL_UNNUMBERED -2
28 static ctl_table nfs_cb_sysctls[] = {
31 .ctl_name = CTL_UNNUMBERED,
32 .procname = "nfs_callback_tcpport",
33 .data = &nfs_callback_set_tcpport,
34 .maxlen = sizeof(int),
36 .proc_handler = &proc_dointvec_minmax,
37 .extra1 = (int *)&nfs_set_port_min,
38 .extra2 = (int *)&nfs_set_port_max,
41 .ctl_name = CTL_UNNUMBERED,
42 .procname = "idmap_cache_timeout",
43 .data = &nfs_idmap_cache_timeout,
44 .maxlen = sizeof(int),
46 .proc_handler = &proc_dointvec_jiffies,
47 .strategy = &sysctl_jiffies,
51 .ctl_name = CTL_UNNUMBERED,
52 .procname = "nfs_mountpoint_timeout",
53 .data = &nfs_mountpoint_expiry_timeout,
54 .maxlen = sizeof(nfs_mountpoint_expiry_timeout),
56 .proc_handler = &proc_dointvec_jiffies,
57 .strategy = &sysctl_jiffies,
59 #ifdef CONFIG_NFS_FSCACHE
61 .ctl_name = CTL_UNNUMBERED,
62 .procname = "fscache_from_error",
63 .data = &nfs_fscache_from_error,
64 .maxlen = sizeof(int),
66 .proc_handler = &proc_dointvec,
69 .ctl_name = CTL_UNNUMBERED,
70 .procname = "fscache_to_error",
71 .data = &nfs_fscache_to_error,
72 .maxlen = sizeof(int),
74 .proc_handler = &proc_dointvec,
77 .ctl_name = CTL_UNNUMBERED,
78 .procname = "fscache_uncache_page",
79 .data = &nfs_fscache_uncache_page,
80 .maxlen = sizeof(int),
82 .proc_handler = &proc_dointvec,
85 .ctl_name = CTL_UNNUMBERED,
86 .procname = "fscache_to_pages",
87 .data = &nfs_fscache_to_pages,
88 .maxlen = sizeof(int),
90 .proc_handler = &proc_dointvec_minmax,
93 .ctl_name = CTL_UNNUMBERED,
94 .procname = "fscache_from_pages",
95 .data = &nfs_fscache_from_pages,
96 .maxlen = sizeof(int),
98 .proc_handler = &proc_dointvec,
104 static ctl_table nfs_cb_sysctl_dir[] = {
106 .ctl_name = CTL_UNNUMBERED,
109 .child = nfs_cb_sysctls,
114 static ctl_table nfs_cb_sysctl_root[] = {
119 .child = nfs_cb_sysctl_dir,
124 int nfs_register_sysctl(void)
126 nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root, 0);
127 if (nfs_callback_sysctl_table == NULL)
132 void nfs_unregister_sysctl(void)
134 unregister_sysctl_table(nfs_callback_sysctl_table);
135 nfs_callback_sysctl_table = NULL;