blob: e65dcc613339a932f4796467c11d8ff6ffd5f488 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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>
Tom Tuckerdc9a16e2007-12-30 21:08:31 -060021#include <linux/sunrpc/svc_xprt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23/*
24 * Declare the debug flags here
25 */
26unsigned int rpc_debug;
Trond Myklebuste8914c62007-07-14 15:39:59 -040027EXPORT_SYMBOL_GPL(rpc_debug);
Trond Myklebusta6eaf8b2007-07-14 15:39:58 -040028
Linus Torvalds1da177e2005-04-16 15:20:36 -070029unsigned int nfs_debug;
Trond Myklebuste8914c62007-07-14 15:39:59 -040030EXPORT_SYMBOL_GPL(nfs_debug);
Trond Myklebusta6eaf8b2007-07-14 15:39:58 -040031
Linus Torvalds1da177e2005-04-16 15:20:36 -070032unsigned int nfsd_debug;
Trond Myklebuste8914c62007-07-14 15:39:59 -040033EXPORT_SYMBOL_GPL(nfsd_debug);
Trond Myklebusta6eaf8b2007-07-14 15:39:58 -040034
Linus Torvalds1da177e2005-04-16 15:20:36 -070035unsigned int nlm_debug;
Trond Myklebuste8914c62007-07-14 15:39:59 -040036EXPORT_SYMBOL_GPL(nlm_debug);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#ifdef RPC_DEBUG
39
40static struct ctl_table_header *sunrpc_table_header;
41static ctl_table sunrpc_table[];
42
43void
44rpc_register_sysctl(void)
45{
Eric W. Biederman2b1bec52007-02-14 00:33:24 -080046 if (!sunrpc_table_header)
Eric W. Biederman0b4d4142007-02-14 00:34:09 -080047 sunrpc_table_header = register_sysctl_table(sunrpc_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
50void
51rpc_unregister_sysctl(void)
52{
53 if (sunrpc_table_header) {
54 unregister_sysctl_table(sunrpc_table_header);
55 sunrpc_table_header = NULL;
56 }
57}
58
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070059static int proc_do_xprt(ctl_table *table, int write,
Tom Tuckerdc9a16e2007-12-30 21:08:31 -060060 void __user *buffer, size_t *lenp, loff_t *ppos)
61{
62 char tmpbuf[256];
Cyrill Gorcunov27df6f22008-08-31 19:25:49 +040063 size_t len;
64
Tom Tuckerdc9a16e2007-12-30 21:08:31 -060065 if ((*ppos && !write) || !*lenp) {
66 *lenp = 0;
67 return 0;
68 }
Cyrill Gorcunov27df6f22008-08-31 19:25:49 +040069 len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
70 return simple_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
Tom Tuckerdc9a16e2007-12-30 21:08:31 -060071}
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073static int
Alexey Dobriyan8d65af72009-09-23 15:57:19 -070074proc_dodebug(ctl_table *table, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 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 */
J. Bruce Fieldsbc2a3f82007-10-29 14:37:18 -0700112 if (strcmp(table->procname, "rpc_debug") == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 rpc_show_tasks();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 } 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
129done:
130 *lenp -= left;
131 *ppos += *lenp;
132 return 0;
133}
134
Chuck Levera246b012005-08-11 16:25:23 -0400135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136static ctl_table debug_table[] = {
137 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 .procname = "rpc_debug",
139 .data = &rpc_debug,
140 .maxlen = sizeof(int),
141 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800142 .proc_handler = proc_dodebug
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800143 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 .procname = "nfs_debug",
146 .data = &nfs_debug,
147 .maxlen = sizeof(int),
148 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800149 .proc_handler = proc_dodebug
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800150 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 .procname = "nfsd_debug",
153 .data = &nfsd_debug,
154 .maxlen = sizeof(int),
155 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800156 .proc_handler = proc_dodebug
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800157 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .procname = "nlm_debug",
160 .data = &nlm_debug,
161 .maxlen = sizeof(int),
162 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800163 .proc_handler = proc_dodebug
YOSHIFUJI Hideakicca51722007-02-09 15:38:13 -0800164 },
Tom Tuckerdc9a16e2007-12-30 21:08:31 -0600165 {
166 .procname = "transports",
167 .maxlen = 256,
168 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800169 .proc_handler = proc_do_xprt,
Tom Tuckerdc9a16e2007-12-30 21:08:31 -0600170 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800171 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172};
173
174static ctl_table sunrpc_table[] = {
175 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 .procname = "sunrpc",
177 .mode = 0555,
178 .child = debug_table
179 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800180 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181};
182
183#endif