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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> | |
dc9a16e4 | 21 | #include <linux/sunrpc/svc_xprt.h> |
1da177e4 LT |
22 | |
23 | /* | |
24 | * Declare the debug flags here | |
25 | */ | |
26 | unsigned int rpc_debug; | |
e8914c65 | 27 | EXPORT_SYMBOL_GPL(rpc_debug); |
a6eaf8bd | 28 | |
1da177e4 | 29 | unsigned int nfs_debug; |
e8914c65 | 30 | EXPORT_SYMBOL_GPL(nfs_debug); |
a6eaf8bd | 31 | |
1da177e4 | 32 | unsigned int nfsd_debug; |
e8914c65 | 33 | EXPORT_SYMBOL_GPL(nfsd_debug); |
a6eaf8bd | 34 | |
1da177e4 | 35 | unsigned int nlm_debug; |
e8914c65 | 36 | EXPORT_SYMBOL_GPL(nlm_debug); |
1da177e4 LT |
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 | { | |
2b1bec5f | 46 | if (!sunrpc_table_header) |
0b4d4147 | 47 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
1da177e4 LT |
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 | ||
dc9a16e4 TT |
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 | int len; | |
64 | if ((*ppos && !write) || !*lenp) { | |
65 | *lenp = 0; | |
66 | return 0; | |
67 | } | |
68 | if (write) | |
69 | return -EINVAL; | |
70 | else { | |
71 | len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); | |
72 | if (!access_ok(VERIFY_WRITE, buffer, len)) | |
73 | return -EFAULT; | |
74 | ||
75 | if (__copy_to_user(buffer, tmpbuf, len)) | |
76 | return -EFAULT; | |
77 | } | |
78 | *lenp -= len; | |
79 | *ppos += len; | |
80 | return 0; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int |
84 | proc_dodebug(ctl_table *table, int write, struct file *file, | |
85 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
86 | { | |
87 | char tmpbuf[20], c, *s; | |
88 | char __user *p; | |
89 | unsigned int value; | |
90 | size_t left, len; | |
91 | ||
92 | if ((*ppos && !write) || !*lenp) { | |
93 | *lenp = 0; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | left = *lenp; | |
98 | ||
99 | if (write) { | |
100 | if (!access_ok(VERIFY_READ, buffer, left)) | |
101 | return -EFAULT; | |
102 | p = buffer; | |
103 | while (left && __get_user(c, p) >= 0 && isspace(c)) | |
104 | left--, p++; | |
105 | if (!left) | |
106 | goto done; | |
107 | ||
108 | if (left > sizeof(tmpbuf) - 1) | |
109 | return -EINVAL; | |
110 | if (copy_from_user(tmpbuf, p, left)) | |
111 | return -EFAULT; | |
112 | tmpbuf[left] = '\0'; | |
113 | ||
114 | for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--) | |
115 | value = 10 * value + (*s - '0'); | |
116 | if (*s && !isspace(*s)) | |
117 | return -EINVAL; | |
118 | while (left && isspace(*s)) | |
119 | left--, s++; | |
120 | *(unsigned int *) table->data = value; | |
121 | /* Display the RPC tasks on writing to rpc_debug */ | |
bc2a3f86 | 122 | if (strcmp(table->procname, "rpc_debug") == 0) |
1da177e4 | 123 | rpc_show_tasks(); |
1da177e4 LT |
124 | } else { |
125 | if (!access_ok(VERIFY_WRITE, buffer, left)) | |
126 | return -EFAULT; | |
127 | len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data); | |
128 | if (len > left) | |
129 | len = left; | |
130 | if (__copy_to_user(buffer, tmpbuf, len)) | |
131 | return -EFAULT; | |
132 | if ((left -= len) > 0) { | |
133 | if (put_user('\n', (char __user *)buffer + len)) | |
134 | return -EFAULT; | |
135 | left--; | |
136 | } | |
137 | } | |
138 | ||
139 | done: | |
140 | *lenp -= left; | |
141 | *ppos += *lenp; | |
142 | return 0; | |
143 | } | |
144 | ||
a246b010 | 145 | |
1da177e4 LT |
146 | static ctl_table debug_table[] = { |
147 | { | |
1da177e4 LT |
148 | .procname = "rpc_debug", |
149 | .data = &rpc_debug, | |
150 | .maxlen = sizeof(int), | |
151 | .mode = 0644, | |
152 | .proc_handler = &proc_dodebug | |
cca5172a | 153 | }, |
1da177e4 | 154 | { |
1da177e4 LT |
155 | .procname = "nfs_debug", |
156 | .data = &nfs_debug, | |
157 | .maxlen = sizeof(int), | |
158 | .mode = 0644, | |
159 | .proc_handler = &proc_dodebug | |
cca5172a | 160 | }, |
1da177e4 | 161 | { |
1da177e4 LT |
162 | .procname = "nfsd_debug", |
163 | .data = &nfsd_debug, | |
164 | .maxlen = sizeof(int), | |
165 | .mode = 0644, | |
166 | .proc_handler = &proc_dodebug | |
cca5172a | 167 | }, |
1da177e4 | 168 | { |
1da177e4 LT |
169 | .procname = "nlm_debug", |
170 | .data = &nlm_debug, | |
171 | .maxlen = sizeof(int), | |
172 | .mode = 0644, | |
173 | .proc_handler = &proc_dodebug | |
cca5172a | 174 | }, |
dc9a16e4 TT |
175 | { |
176 | .procname = "transports", | |
177 | .maxlen = 256, | |
178 | .mode = 0444, | |
179 | .proc_handler = &proc_do_xprt, | |
180 | }, | |
1da177e4 LT |
181 | { .ctl_name = 0 } |
182 | }; | |
183 | ||
184 | static ctl_table sunrpc_table[] = { | |
185 | { | |
186 | .ctl_name = CTL_SUNRPC, | |
187 | .procname = "sunrpc", | |
188 | .mode = 0555, | |
189 | .child = debug_table | |
190 | }, | |
191 | { .ctl_name = 0 } | |
192 | }; | |
193 | ||
194 | #endif |