[linux.git] / net / sunrpc / sysctl.c

/*
 * 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);
}

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
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	{
2b1bec5f	38	if (!sunrpc_table_header)
0b4d4147	39	sunrpc_table_header = register_sysctl_table(sunrpc_table);
1da177e4 LT	40	}
	41
	42	void
	43	rpc_unregister_sysctl(void)
	44	{
	45	if (sunrpc_table_header) {
	46	unregister_sysctl_table(sunrpc_table_header);
	47	sunrpc_table_header = NULL;
	48	}
	49	}
	50
	51	static int
	52	proc_dodebug(ctl_table table, int write, struct file file,
	53	void __user buffer, size_t lenp, loff_t *ppos)
	54	{
	55	char tmpbuf[20], c, *s;
	56	char __user *p;
	57	unsigned int value;
	58	size_t left, len;
	59
	60	if ((ppos && !write) \|\| !lenp) {
	61	*lenp = 0;
	62	return 0;
	63	}
	64
	65	left = *lenp;
	66
	67	if (write) {
	68	if (!access_ok(VERIFY_READ, buffer, left))
	69	return -EFAULT;
	70	p = buffer;
	71	while (left && __get_user(c, p) >= 0 && isspace(c))
	72	left--, p++;
	73	if (!left)
	74	goto done;
	75
	76	if (left > sizeof(tmpbuf) - 1)
	77	return -EINVAL;
	78	if (copy_from_user(tmpbuf, p, left))
	79	return -EFAULT;
	80	tmpbuf[left] = '\0';
	81
	82	for (s = tmpbuf, value = 0; '0' <= s && s <= '9'; s++, left--)
	83	value = 10 * value + (*s - '0');
	84	if (s && !isspace(s))
	85	return -EINVAL;
	86	while (left && isspace(*s))
	87	left--, s++;
	88	(unsigned int ) table->data = value;
	89	/* Display the RPC tasks on writing to rpc_debug */
	90	if (table->ctl_name == CTL_RPCDEBUG) {
	91	rpc_show_tasks();
	92	}
	93	} else {
	94	if (!access_ok(VERIFY_WRITE, buffer, left))
	95	return -EFAULT;
	96	len = sprintf(tmpbuf, "%d", (unsigned int ) table->data);
	97	if (len > left)
	98	len = left;
	99	if (__copy_to_user(buffer, tmpbuf, len))
	100	return -EFAULT;
	101	if ((left -= len) > 0) {
	102	if (put_user('\n', (char __user *)buffer + len))
	103	return -EFAULT;
104	left--;
105	}
106	}
107
108	done:
109	*lenp -= left;
110	ppos += lenp;
111	return 0;
112	}
113
a246b010	114
1da177e4 LT	115	static ctl_table debug_table[] = {
	116	{
	117	.ctl_name = CTL_RPCDEBUG,
	118	.procname = "rpc_debug",
	119	.data = &rpc_debug,
	120	.maxlen = sizeof(int),
	121	.mode = 0644,
	122	.proc_handler = &proc_dodebug
cca5172a	123	},
1da177e4 LT	124	{
	125	.ctl_name = CTL_NFSDEBUG,
	126	.procname = "nfs_debug",
	127	.data = &nfs_debug,
	128	.maxlen = sizeof(int),
	129	.mode = 0644,
	130	.proc_handler = &proc_dodebug
cca5172a	131	},
1da177e4 LT	132	{
	133	.ctl_name = CTL_NFSDDEBUG,
	134	.procname = "nfsd_debug",
	135	.data = &nfsd_debug,
	136	.maxlen = sizeof(int),
	137	.mode = 0644,
	138	.proc_handler = &proc_dodebug
cca5172a	139	},
1da177e4 LT	140	{
	141	.ctl_name = CTL_NLMDEBUG,
	142	.procname = "nlm_debug",
	143	.data = &nlm_debug,
	144	.maxlen = sizeof(int),
	145	.mode = 0644,
	146	.proc_handler = &proc_dodebug
cca5172a	147	},
1da177e4 LT	148	{ .ctl_name = 0 }
	149	};
	150
	151	static ctl_table sunrpc_table[] = {
	152	{
	153	.ctl_name = CTL_SUNRPC,
	154	.procname = "sunrpc",
	155	.mode = 0555,
	156	.child = debug_table
	157	},
	158	{ .ctl_name = 0 }
	159	};
	160
	161	#endif