Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/net/sunrpc/sysctl.c | |
3 | * | |
4 | * Sysctl interface to sunrpc module. | |
5 | * | |
6 | * I would prefer to register the sunrpc table below sys/net, but that's | |
7 | * impossible at the moment. | |
8 | */ | |
9 | ||
1da177e4 LT |
10 | #include <linux/types.h> |
11 | #include <linux/linkage.h> | |
12 | #include <linux/ctype.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/sysctl.h> | |
15 | #include <linux/module.h> | |
16 | ||
17 | #include <asm/uaccess.h> | |
18 | #include <linux/sunrpc/types.h> | |
19 | #include <linux/sunrpc/sched.h> | |
20 | #include <linux/sunrpc/stats.h> | |
1da177e4 LT |
21 | |
22 | /* | |
23 | * Declare the debug flags here | |
24 | */ | |
25 | unsigned int rpc_debug; | |
e8914c65 | 26 | EXPORT_SYMBOL_GPL(rpc_debug); |
a6eaf8bd | 27 | |
1da177e4 | 28 | unsigned int nfs_debug; |
e8914c65 | 29 | EXPORT_SYMBOL_GPL(nfs_debug); |
a6eaf8bd | 30 | |
1da177e4 | 31 | unsigned int nfsd_debug; |
e8914c65 | 32 | EXPORT_SYMBOL_GPL(nfsd_debug); |
a6eaf8bd | 33 | |
1da177e4 | 34 | unsigned int nlm_debug; |
e8914c65 | 35 | EXPORT_SYMBOL_GPL(nlm_debug); |
1da177e4 LT |
36 | |
37 | #ifdef RPC_DEBUG | |
38 | ||
39 | static struct ctl_table_header *sunrpc_table_header; | |
40 | static ctl_table sunrpc_table[]; | |
41 | ||
42 | void | |
43 | rpc_register_sysctl(void) | |
44 | { | |
2b1bec5f | 45 | if (!sunrpc_table_header) |
0b4d4147 | 46 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
1da177e4 LT |
47 | } |
48 | ||
49 | void | |
50 | rpc_unregister_sysctl(void) | |
51 | { | |
52 | if (sunrpc_table_header) { | |
53 | unregister_sysctl_table(sunrpc_table_header); | |
54 | sunrpc_table_header = NULL; | |
55 | } | |
56 | } | |
57 | ||
58 | static int | |
59 | proc_dodebug(ctl_table *table, int write, struct file *file, | |
60 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
61 | { | |
62 | char tmpbuf[20], c, *s; | |
63 | char __user *p; | |
64 | unsigned int value; | |
65 | size_t left, len; | |
66 | ||
67 | if ((*ppos && !write) || !*lenp) { | |
68 | *lenp = 0; | |
69 | return 0; | |
70 | } | |
71 | ||
72 | left = *lenp; | |
73 | ||
74 | if (write) { | |
75 | if (!access_ok(VERIFY_READ, buffer, left)) | |
76 | return -EFAULT; | |
77 | p = buffer; | |
78 | while (left && __get_user(c, p) >= 0 && isspace(c)) | |
79 | left--, p++; | |
80 | if (!left) | |
81 | goto done; | |
82 | ||
83 | if (left > sizeof(tmpbuf) - 1) | |
84 | return -EINVAL; | |
85 | if (copy_from_user(tmpbuf, p, left)) | |
86 | return -EFAULT; | |
87 | tmpbuf[left] = '\0'; | |
88 | ||
89 | for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--) | |
90 | value = 10 * value + (*s - '0'); | |
91 | if (*s && !isspace(*s)) | |
92 | return -EINVAL; | |
93 | while (left && isspace(*s)) | |
94 | left--, s++; | |
95 | *(unsigned int *) table->data = value; | |
96 | /* Display the RPC tasks on writing to rpc_debug */ | |
bc2a3f86 | 97 | if (strcmp(table->procname, "rpc_debug") == 0) |
1da177e4 | 98 | rpc_show_tasks(); |
1da177e4 LT |
99 | } else { |
100 | if (!access_ok(VERIFY_WRITE, buffer, left)) | |
101 | return -EFAULT; | |
102 | len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data); | |
103 | if (len > left) | |
104 | len = left; | |
105 | if (__copy_to_user(buffer, tmpbuf, len)) | |
106 | return -EFAULT; | |
107 | if ((left -= len) > 0) { | |
108 | if (put_user('\n', (char __user *)buffer + len)) | |
109 | return -EFAULT; | |
110 | left--; | |
111 | } | |
112 | } | |
113 | ||
114 | done: | |
115 | *lenp -= left; | |
116 | *ppos += *lenp; | |
117 | return 0; | |
118 | } | |
119 | ||
a246b010 | 120 | |
1da177e4 LT |
121 | static ctl_table debug_table[] = { |
122 | { | |
1da177e4 LT |
123 | .procname = "rpc_debug", |
124 | .data = &rpc_debug, | |
125 | .maxlen = sizeof(int), | |
126 | .mode = 0644, | |
127 | .proc_handler = &proc_dodebug | |
cca5172a | 128 | }, |
1da177e4 | 129 | { |
1da177e4 LT |
130 | .procname = "nfs_debug", |
131 | .data = &nfs_debug, | |
132 | .maxlen = sizeof(int), | |
133 | .mode = 0644, | |
134 | .proc_handler = &proc_dodebug | |
cca5172a | 135 | }, |
1da177e4 | 136 | { |
1da177e4 LT |
137 | .procname = "nfsd_debug", |
138 | .data = &nfsd_debug, | |
139 | .maxlen = sizeof(int), | |
140 | .mode = 0644, | |
141 | .proc_handler = &proc_dodebug | |
cca5172a | 142 | }, |
1da177e4 | 143 | { |
1da177e4 LT |
144 | .procname = "nlm_debug", |
145 | .data = &nlm_debug, | |
146 | .maxlen = sizeof(int), | |
147 | .mode = 0644, | |
148 | .proc_handler = &proc_dodebug | |
cca5172a | 149 | }, |
1da177e4 LT |
150 | { .ctl_name = 0 } |
151 | }; | |
152 | ||
153 | static ctl_table sunrpc_table[] = { | |
154 | { | |
155 | .ctl_name = CTL_SUNRPC, | |
156 | .procname = "sunrpc", | |
157 | .mode = 0555, | |
158 | .child = debug_table | |
159 | }, | |
160 | { .ctl_name = 0 } | |
161 | }; | |
162 | ||
163 | #endif |