sysctl: Drop & in front of every proc_handler.
[linux-2.6.git] / net / sunrpc / sysctl.c
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
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>
21 #include <linux/sunrpc/svc_xprt.h>
22
23 /*
24  * Declare the debug flags here
25  */
26 unsigned int    rpc_debug;
27 EXPORT_SYMBOL_GPL(rpc_debug);
28
29 unsigned int    nfs_debug;
30 EXPORT_SYMBOL_GPL(nfs_debug);
31
32 unsigned int    nfsd_debug;
33 EXPORT_SYMBOL_GPL(nfsd_debug);
34
35 unsigned int    nlm_debug;
36 EXPORT_SYMBOL_GPL(nlm_debug);
37
38 #ifdef RPC_DEBUG
39
40 static struct ctl_table_header *sunrpc_table_header;
41 static ctl_table                sunrpc_table[];
42
43 void
44 rpc_register_sysctl(void)
45 {
46         if (!sunrpc_table_header)
47                 sunrpc_table_header = register_sysctl_table(sunrpc_table);
48 }
49
50 void
51 rpc_unregister_sysctl(void)
52 {
53         if (sunrpc_table_header) {
54                 unregister_sysctl_table(sunrpc_table_header);
55                 sunrpc_table_header = NULL;
56         }
57 }
58
59 static int proc_do_xprt(ctl_table *table, int write,
60                         void __user *buffer, size_t *lenp, loff_t *ppos)
61 {
62         char tmpbuf[256];
63         size_t len;
64
65         if ((*ppos && !write) || !*lenp) {
66                 *lenp = 0;
67                 return 0;
68         }
69         len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
70         return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
71 }
72
73 static int
74 proc_dodebug(ctl_table *table, int write,
75                                 void __user *buffer, size_t *lenp, loff_t *ppos)
76 {
77         char            tmpbuf[20], c, *s;
78         char __user *p;
79         unsigned int    value;
80         size_t          left, len;
81
82         if ((*ppos && !write) || !*lenp) {
83                 *lenp = 0;
84                 return 0;
85         }
86
87         left = *lenp;
88
89         if (write) {
90                 if (!access_ok(VERIFY_READ, buffer, left))
91                         return -EFAULT;
92                 p = buffer;
93                 while (left && __get_user(c, p) >= 0 && isspace(c))
94                         left--, p++;
95                 if (!left)
96                         goto done;
97
98                 if (left > sizeof(tmpbuf) - 1)
99                         return -EINVAL;
100                 if (copy_from_user(tmpbuf, p, left))
101                         return -EFAULT;
102                 tmpbuf[left] = '\0';
103
104                 for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
105                         value = 10 * value + (*s - '0');
106                 if (*s && !isspace(*s))
107                         return -EINVAL;
108                 while (left && isspace(*s))
109                         left--, s++;
110                 *(unsigned int *) table->data = value;
111                 /* Display the RPC tasks on writing to rpc_debug */
112                 if (strcmp(table->procname, "rpc_debug") == 0)
113                         rpc_show_tasks();
114         } else {
115                 if (!access_ok(VERIFY_WRITE, buffer, left))
116                         return -EFAULT;
117                 len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
118                 if (len > left)
119                         len = left;
120                 if (__copy_to_user(buffer, tmpbuf, len))
121                         return -EFAULT;
122                 if ((left -= len) > 0) {
123                         if (put_user('\n', (char __user *)buffer + len))
124                                 return -EFAULT;
125                         left--;
126                 }
127         }
128
129 done:
130         *lenp -= left;
131         *ppos += *lenp;
132         return 0;
133 }
134
135
136 static ctl_table debug_table[] = {
137         {
138                 .procname       = "rpc_debug",
139                 .data           = &rpc_debug,
140                 .maxlen         = sizeof(int),
141                 .mode           = 0644,
142                 .proc_handler   = proc_dodebug
143         },
144         {
145                 .procname       = "nfs_debug",
146                 .data           = &nfs_debug,
147                 .maxlen         = sizeof(int),
148                 .mode           = 0644,
149                 .proc_handler   = proc_dodebug
150         },
151         {
152                 .procname       = "nfsd_debug",
153                 .data           = &nfsd_debug,
154                 .maxlen         = sizeof(int),
155                 .mode           = 0644,
156                 .proc_handler   = proc_dodebug
157         },
158         {
159                 .procname       = "nlm_debug",
160                 .data           = &nlm_debug,
161                 .maxlen         = sizeof(int),
162                 .mode           = 0644,
163                 .proc_handler   = proc_dodebug
164         },
165         {
166                 .procname       = "transports",
167                 .maxlen         = 256,
168                 .mode           = 0444,
169                 .proc_handler   = proc_do_xprt,
170         },
171         { }
172 };
173
174 static ctl_table sunrpc_table[] = {
175         {
176                 .procname       = "sunrpc",
177                 .mode           = 0555,
178                 .child          = debug_table
179         },
180         { }
181 };
182
183 #endif