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1 | /* |
2 | * linux/fs/nfs/sysctl.c |
3 | * |
4 | * Sysctl interface to NFS parameters |
5 | */ |
6 | #include <linux/types.h> |
7 | #include <linux/linkage.h> |
8 | #include <linux/ctype.h> |
9 | #include <linux/fs.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> |
15 | |
16 | #include "callback.h" |
17 | |
18 | #ifdef CONFIG_NFS_V4 |
19 | static const int nfs_set_port_min = 0; |
20 | static const int nfs_set_port_max = 65535; |
21 | #endif |
22 | static struct ctl_table_header *nfs_callback_sysctl_table; |
23 | |
24 | static ctl_table nfs_cb_sysctls[] = { |
25 | #ifdef CONFIG_NFS_V4 |
26 | { |
27 | .procname = "nfs_callback_tcpport", |
28 | .data = &nfs_callback_set_tcpport, |
29 | .maxlen = sizeof(int), |
30 | .mode = 0644, |
31 | .proc_handler = proc_dointvec_minmax, |
32 | .extra1 = (int *)&nfs_set_port_min, |
33 | .extra2 = (int *)&nfs_set_port_max, |
34 | }, |
35 | #ifndef CONFIG_NFS_USE_NEW_IDMAPPER |
36 | { |
37 | .procname = "idmap_cache_timeout", |
38 | .data = &nfs_idmap_cache_timeout, |
39 | .maxlen = sizeof(int), |
40 | .mode = 0644, |
41 | .proc_handler = proc_dointvec_jiffies, |
42 | }, |
43 | #endif /* CONFIG_NFS_USE_NEW_IDMAPPER */ |
44 | #endif |
45 | { |
46 | .procname = "nfs_mountpoint_timeout", |
47 | .data = &nfs_mountpoint_expiry_timeout, |
48 | .maxlen = sizeof(nfs_mountpoint_expiry_timeout), |
49 | .mode = 0644, |
50 | .proc_handler = proc_dointvec_jiffies, |
51 | }, |
52 | { |
53 | .procname = "nfs_congestion_kb", |
54 | .data = &nfs_congestion_kb, |
55 | .maxlen = sizeof(nfs_congestion_kb), |
56 | .mode = 0644, |
57 | .proc_handler = proc_dointvec, |
58 | }, |
59 | { } |
60 | }; |
61 | |
62 | static ctl_table nfs_cb_sysctl_dir[] = { |
63 | { |
64 | .procname = "nfs", |
65 | .mode = 0555, |
66 | .child = nfs_cb_sysctls, |
67 | }, |
68 | { } |
69 | }; |
70 | |
71 | static ctl_table nfs_cb_sysctl_root[] = { |
72 | { |
73 | .procname = "fs", |
74 | .mode = 0555, |
75 | .child = nfs_cb_sysctl_dir, |
76 | }, |
77 | { } |
78 | }; |
79 | |
80 | int nfs_register_sysctl(void) |
81 | { |
82 | nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root); |
83 | if (nfs_callback_sysctl_table == NULL) |
84 | return -ENOMEM; |
85 | return 0; |
86 | } |
87 | |
88 | void nfs_unregister_sysctl(void) |
89 | { |
90 | unregister_sysctl_table(nfs_callback_sysctl_table); |
91 | nfs_callback_sysctl_table = NULL; |
92 | } |
93 |
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