/* * 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_DEBUGstatic struct ctl_table_header *sunrpc_table_header;static ctl_table		sunrpc_table[];voidrpc_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	}			}voidrpc_unregister_sysctl(void){	if (sunrpc_table_header) {		unregister_sysctl_table(sunrpc_table_header);		sunrpc_table_header = NULL;	}}static intproc_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