Viewing file:  sysctl.c (2.84 KB) -rw-r--r--
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/*
* linux/net/sunrpc/sysctl.c
*
* Sysctl interface to sunrpc module. This is for debugging only now.
*
* I would prefer to register the sunrpc table below sys/net, but that's
* impossible at the moment.
*/
#include <linux/config.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/linkage.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
#define __NO_VERSION__
#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, 1);
#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 *buffer, size_t *lenp)
{
char tmpbuf[20], *p, c;
unsigned int value;
size_t left, len;
if ((file->f_pos && !write) || !*lenp) {
*lenp = 0;
return 0;
}
left = *lenp;
if (write) {
if (!access_ok(VERIFY_READ, buffer, left))
return -EFAULT;
p = (char *) buffer;
while (left && __get_user(c, p) >= 0 && isspace(c))
left--, p++;
if (!left)
goto done;
if (left > sizeof(tmpbuf) - 1)
return -EINVAL;
copy_from_user(tmpbuf, p, left);
tmpbuf[left] = '\0';
for (p = tmpbuf, value = 0; '0' <= *p && *p <= '9'; p++, left--)
value = 10 * value + (*p - '0');
if (*p && !isspace(*p))
return -EINVAL;
while (left && isspace(*p))
left--, p++;
*(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;
copy_to_user(buffer, tmpbuf, len);
if ((left -= len) > 0) {
put_user('\n', (char *)buffer + len);
left--;
}
}
done:
*lenp -= left;
file->f_pos += *lenp;
return 0;
}
#define DIRENTRY(nam1, nam2, child) \
{CTL_##nam1, #nam2, NULL, 0, 0555, child }
#define DBGENTRY(nam1, nam2) \
{CTL_##nam1##DEBUG, #nam2 "_debug", &nam2##_debug, sizeof(int),\
0644, NULL, &proc_dodebug}
static ctl_table debug_table[] = {
DBGENTRY(RPC, rpc),
DBGENTRY(NFS, nfs),
DBGENTRY(NFSD, nfsd),
DBGENTRY(NLM, nlm),
{0}
};
static ctl_table sunrpc_table[] = {
DIRENTRY(SUNRPC, sunrpc, debug_table),
{0}
};
#endif
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