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, struct file *file,
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, struct file *file,
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; '' <= *s && *s <= '9'; s++, left--)
105 value = 10 * value + (*s - '');
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 { .ctl_name = 0 }
172 };
173
174 static ctl_table sunrpc_table[] = {
175 {
176 .ctl_name = CTL_SUNRPC,
177 .procname = "sunrpc",
178 .mode = 0555,
179 .child = debug_table
180 },
181 { .ctl_name = 0 }
182 };
183
184 #endif
185
|
This page was automatically generated by the
LXR engine.
|