Commit | Line | Data |
---|---|---|
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; | |
26 | unsigned int nfs_debug; | |
27 | unsigned int nfsd_debug; | |
28 | unsigned int nlm_debug; | |
29 | ||
30 | #ifdef RPC_DEBUG | |
31 | ||
32 | static struct ctl_table_header *sunrpc_table_header; | |
33 | static ctl_table sunrpc_table[]; | |
34 | ||
35 | void | |
36 | rpc_register_sysctl(void) | |
37 | { | |
38 | if (!sunrpc_table_header) { | |
39 | sunrpc_table_header = register_sysctl_table(sunrpc_table, 1); | |
40 | #ifdef CONFIG_PROC_FS | |
41 | if (sunrpc_table[0].de) | |
42 | sunrpc_table[0].de->owner = THIS_MODULE; | |
43 | #endif | |
44 | } | |
45 | ||
46 | } | |
47 | ||
48 | void | |
49 | rpc_unregister_sysctl(void) | |
50 | { | |
51 | if (sunrpc_table_header) { | |
52 | unregister_sysctl_table(sunrpc_table_header); | |
53 | sunrpc_table_header = NULL; | |
54 | } | |
55 | } | |
56 | ||
57 | static int | |
58 | proc_dodebug(ctl_table *table, int write, struct file *file, | |
59 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
60 | { | |
61 | char tmpbuf[20], c, *s; | |
62 | char __user *p; | |
63 | unsigned int value; | |
64 | size_t left, len; | |
65 | ||
66 | if ((*ppos && !write) || !*lenp) { | |
67 | *lenp = 0; | |
68 | return 0; | |
69 | } | |
70 | ||
71 | left = *lenp; | |
72 | ||
73 | if (write) { | |
74 | if (!access_ok(VERIFY_READ, buffer, left)) | |
75 | return -EFAULT; | |
76 | p = buffer; | |
77 | while (left && __get_user(c, p) >= 0 && isspace(c)) | |
78 | left--, p++; | |
79 | if (!left) | |
80 | goto done; | |
81 | ||
82 | if (left > sizeof(tmpbuf) - 1) | |
83 | return -EINVAL; | |
84 | if (copy_from_user(tmpbuf, p, left)) | |
85 | return -EFAULT; | |
86 | tmpbuf[left] = '\0'; | |
87 | ||
88 | for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--) | |
89 | value = 10 * value + (*s - '0'); | |
90 | if (*s && !isspace(*s)) | |
91 | return -EINVAL; | |
92 | while (left && isspace(*s)) | |
93 | left--, s++; | |
94 | *(unsigned int *) table->data = value; | |
95 | /* Display the RPC tasks on writing to rpc_debug */ | |
96 | if (table->ctl_name == CTL_RPCDEBUG) { | |
97 | rpc_show_tasks(); | |
98 | } | |
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 | { | |
123 | .ctl_name = CTL_RPCDEBUG, | |
124 | .procname = "rpc_debug", | |
125 | .data = &rpc_debug, | |
126 | .maxlen = sizeof(int), | |
127 | .mode = 0644, | |
128 | .proc_handler = &proc_dodebug | |
129 | }, | |
130 | { | |
131 | .ctl_name = CTL_NFSDEBUG, | |
132 | .procname = "nfs_debug", | |
133 | .data = &nfs_debug, | |
134 | .maxlen = sizeof(int), | |
135 | .mode = 0644, | |
136 | .proc_handler = &proc_dodebug | |
137 | }, | |
138 | { | |
139 | .ctl_name = CTL_NFSDDEBUG, | |
140 | .procname = "nfsd_debug", | |
141 | .data = &nfsd_debug, | |
142 | .maxlen = sizeof(int), | |
143 | .mode = 0644, | |
144 | .proc_handler = &proc_dodebug | |
145 | }, | |
146 | { | |
147 | .ctl_name = CTL_NLMDEBUG, | |
148 | .procname = "nlm_debug", | |
149 | .data = &nlm_debug, | |
150 | .maxlen = sizeof(int), | |
151 | .mode = 0644, | |
152 | .proc_handler = &proc_dodebug | |
153 | }, | |
1da177e4 LT |
154 | { .ctl_name = 0 } |
155 | }; | |
156 | ||
157 | static ctl_table sunrpc_table[] = { | |
158 | { | |
159 | .ctl_name = CTL_SUNRPC, | |
160 | .procname = "sunrpc", | |
161 | .mode = 0555, | |
162 | .child = debug_table | |
163 | }, | |
164 | { .ctl_name = 0 } | |
165 | }; | |
166 | ||
167 | #endif |