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/*
* linux/net/sunrpc/sysctl.c
*
* Sysctl interface to sunrpc module.
*
* I would prefer to register the sunrpc table below sys/net, but that's
* impossible at the moment.
*/
#include <linux/types.h>
#include <linux/linkage.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/stats.h>
/*
* Declare the debug flags here
*/
unsigned int rpc_debug;
unsigned int nfs_debug;
unsigned int nfsd_debug;
unsigned int nlm_debug;
#ifdef RPC_DEBUG
static struct ctl_table_header *sunrpc_table_header;
static ctl_table sunrpc_table[];
void
rpc_register_sysctl(void)
{
if (!sunrpc_table_header) {
sunrpc_table_header = register_sysctl_table(sunrpc_table, 0);
#ifdef CONFIG_PROC_FS
if (sunrpc_table[0].de)
sunrpc_table[0].de->owner = THIS_MODULE;
#endif
}
}
void
rpc_unregister_sysctl(void)
{
if (sunrpc_table_header) {
unregister_sysctl_table(sunrpc_table_header);
sunrpc_table_header = NULL;
}
}
static int
proc_dodebug(ctl_table *table, int write, struct file *file,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
char tmpbuf[20], c, *s;
char __user *p;
unsigned int value;
size_t left, len;
if ((*ppos && !write) || !*lenp) {
*lenp = 0;
return 0;
}
left = *lenp;
if (write) {
if (!access_ok(VERIFY_READ, buffer, left))
return -EFAULT;
p = buffer;
while (left && __get_user(c, p) >= 0 && isspace(c))
left--, p++;
if (!left)
goto done;
if (left > sizeof(tmpbuf) - 1)
return -EINVAL;
if (copy_from_user(tmpbuf, p, left))
return -EFAULT;
tmpbuf[left] = '\0';
for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
value = 10 * value + (*s - '0');
if (*s && !isspace(*s))
return -EINVAL;
while (left && isspace(*s))
left--, s++;
*(unsigned int *) table->data = value;
/* Display the RPC tasks on writing to rpc_debug */
if (table->ctl_name == CTL_RPCDEBUG) {
rpc_show_tasks();
}
} else {
if (!access_ok(VERIFY_WRITE, buffer, left))
return -EFAULT;
len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
if (len > left)
len = left;
if (__copy_to_user(buffer, tmpbuf, len))
return -EFAULT;
if ((left -= len) > 0) {
if (put_user('\n', (char __user *)buffer + len))
return -EFAULT;
left--;
}
}
done:
*lenp -= left;
*ppos += *lenp;
return 0;
}
static ctl_table debug_table[] = {
{
.ctl_name = CTL_RPCDEBUG,
.procname = "rpc_debug",
.data = &rpc_debug,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dodebug
},
{
.ctl_name = CTL_NFSDEBUG,
.procname = "nfs_debug",
.data = &nfs_debug,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dodebug
},
{
.ctl_name = CTL_NFSDDEBUG,
.procname = "nfsd_debug",
.data = &nfsd_debug,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dodebug
},
{
.ctl_name = CTL_NLMDEBUG,
.procname = "nlm_debug",
.data = &nlm_debug,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dodebug
},
{ .ctl_name = 0 }
};
static ctl_table sunrpc_table[] = {
{
.ctl_name = CTL_SUNRPC,
.procname = "sunrpc",
.mode = 0555,
.child = debug_table
},
{ .ctl_name = 0 }
};
#endif
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