[deliverable/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>
#include <linux/sunrpc/svc_xprt.h>

/*
 * Declare the debug flags here
 */
unsigned int	rpc_debug;
EXPORT_SYMBOL_GPL(rpc_debug);

unsigned int	nfs_debug;
EXPORT_SYMBOL_GPL(nfs_debug);

unsigned int	nfsd_debug;
EXPORT_SYMBOL_GPL(nfsd_debug);

unsigned int	nlm_debug;
EXPORT_SYMBOL_GPL(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_do_xprt(ctl_table *table, int write, struct file *file,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	char tmpbuf[256];
	int len;
	if ((*ppos && !write) || !*lenp) {
		*lenp = 0;
		return 0;
	}
	if (write)
		return -EINVAL;
	else {
		len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
		if (!access_ok(VERIFY_WRITE, buffer, len))
			return -EFAULT;

		if (__copy_to_user(buffer, tmpbuf, len))
			return -EFAULT;
	}
	*lenp -= len;
	*ppos += len;
	return 0;
}

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 (strcmp(table->procname, "rpc_debug") == 0)
			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[] = {
	{
		.procname	= "rpc_debug",
		.data		= &rpc_debug,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dodebug
	},
	{
		.procname	= "nfs_debug",
		.data		= &nfs_debug,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dodebug
	},
	{
		.procname	= "nfsd_debug",
		.data		= &nfsd_debug,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dodebug
	},
	{
		.procname	= "nlm_debug",
		.data		= &nlm_debug,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dodebug
	},
	{
		.procname	= "transports",
		.maxlen		= 256,
		.mode		= 0444,
		.proc_handler	= &proc_do_xprt,
	},
	{ .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>
dc9a16e4	21	#include <linux/sunrpc/svc_xprt.h>
1da177e4 LT	22
	23	/*
	24	* Declare the debug flags here
	25	*/
	26	unsigned int rpc_debug;
e8914c65	27	EXPORT_SYMBOL_GPL(rpc_debug);
a6eaf8bd	28
1da177e4	29	unsigned int nfs_debug;
e8914c65	30	EXPORT_SYMBOL_GPL(nfs_debug);
a6eaf8bd	31
1da177e4	32	unsigned int nfsd_debug;
e8914c65	33	EXPORT_SYMBOL_GPL(nfsd_debug);
a6eaf8bd	34
1da177e4	35	unsigned int nlm_debug;
e8914c65	36	EXPORT_SYMBOL_GPL(nlm_debug);
1da177e4 LT	37
	38	#ifdef RPC_DEBUG
	39
	40	static struct ctl_table_header *sunrpc_table_header;
	41	static ctl_table sunrpc_table[];
	42
	43	void
	44	rpc_register_sysctl(void)
	45	{
2b1bec5f	46	if (!sunrpc_table_header)
0b4d4147	47	sunrpc_table_header = register_sysctl_table(sunrpc_table);
1da177e4 LT	48	}
	49
	50	void
	51	rpc_unregister_sysctl(void)
	52	{
	53	if (sunrpc_table_header) {
	54	unregister_sysctl_table(sunrpc_table_header);
	55	sunrpc_table_header = NULL;
	56	}
	57	}
	58
dc9a16e4 TT	59	static int proc_do_xprt(ctl_table table, int write, struct file file,
	60	void __user buffer, size_t lenp, loff_t *ppos)
	61	{
	62	char tmpbuf[256];
	63	int len;
	64	if ((ppos && !write) \|\| !lenp) {
	65	*lenp = 0;
	66	return 0;
	67	}
	68	if (write)
	69	return -EINVAL;
	70	else {
	71	len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
	72	if (!access_ok(VERIFY_WRITE, buffer, len))
	73	return -EFAULT;
	74
	75	if (__copy_to_user(buffer, tmpbuf, len))
	76	return -EFAULT;
	77	}
	78	*lenp -= len;
	79	*ppos += len;
	80	return 0;
	81	}
	82
1da177e4 LT	83	static int
	84	proc_dodebug(ctl_table table, int write, struct file file,
	85	void __user buffer, size_t lenp, loff_t *ppos)
	86	{
	87	char tmpbuf[20], c, *s;
	88	char __user *p;
	89	unsigned int value;
	90	size_t left, len;
	91
	92	if ((ppos && !write) \|\| !lenp) {
	93	*lenp = 0;
	94	return 0;
	95	}
	96
	97	left = *lenp;
	98
	99	if (write) {
	100	if (!access_ok(VERIFY_READ, buffer, left))
	101	return -EFAULT;
	102	p = buffer;
	103	while (left && __get_user(c, p) >= 0 && isspace(c))
	104	left--, p++;
	105	if (!left)
	106	goto done;
	107
	108	if (left > sizeof(tmpbuf) - 1)
	109	return -EINVAL;
	110	if (copy_from_user(tmpbuf, p, left))
	111	return -EFAULT;
	112	tmpbuf[left] = '\0';
	113
	114	for (s = tmpbuf, value = 0; '0' <= s && s <= '9'; s++, left--)
	115	value = 10 * value + (*s - '0');
	116	if (s && !isspace(s))
	117	return -EINVAL;
	118	while (left && isspace(*s))
	119	left--, s++;
	120	(unsigned int ) table->data = value;
	121	/* Display the RPC tasks on writing to rpc_debug */
bc2a3f86	122	if (strcmp(table->procname, "rpc_debug") == 0)
1da177e4	123	rpc_show_tasks();
1da177e4 LT	124	} else {
	125	if (!access_ok(VERIFY_WRITE, buffer, left))
	126	return -EFAULT;
	127	len = sprintf(tmpbuf, "%d", (unsigned int ) table->data);
	128	if (len > left)
	129	len = left;
	130	if (__copy_to_user(buffer, tmpbuf, len))
	131	return -EFAULT;
	132	if ((left -= len) > 0) {
	133	if (put_user('\n', (char __user *)buffer + len))
	134	return -EFAULT;
	135	left--;
	136	}
	137	}
	138
	139	done:
	140	*lenp -= left;
	141	ppos += lenp;
	142	return 0;
	143	}
	144
a246b010	145
1da177e4 LT	146	static ctl_table debug_table[] = {
1da177e4 LT	147	{
1da177e4 LT	148	.procname = "rpc_debug",
	149	.data = &rpc_debug,
	150	.maxlen = sizeof(int),
	151	.mode = 0644,
	152	.proc_handler = &proc_dodebug
cca5172a	153	},
1da177e4	154	{
1da177e4 LT	155	.procname = "nfs_debug",
	156	.data = &nfs_debug,
	157	.maxlen = sizeof(int),
	158	.mode = 0644,
	159	.proc_handler = &proc_dodebug
cca5172a	160	},
1da177e4	161	{
1da177e4 LT	162	.procname = "nfsd_debug",
	163	.data = &nfsd_debug,
	164	.maxlen = sizeof(int),
	165	.mode = 0644,
	166	.proc_handler = &proc_dodebug
cca5172a	167	},
1da177e4	168	{
1da177e4 LT	169	.procname = "nlm_debug",
	170	.data = &nlm_debug,
	171	.maxlen = sizeof(int),
	172	.mode = 0644,
	173	.proc_handler = &proc_dodebug
cca5172a	174	},
dc9a16e4 TT	175	{
	176	.procname = "transports",
	177	.maxlen = 256,
	178	.mode = 0444,
	179	.proc_handler = &proc_do_xprt,
	180	},
1da177e4 LT	181	{ .ctl_name = 0 }
	182	};
	183
	184	static ctl_table sunrpc_table[] = {
	185	{
	186	.ctl_name = CTL_SUNRPC,
	187	.procname = "sunrpc",
	188	.mode = 0555,
	189	.child = debug_table
	190	},
	191	{ .ctl_name = 0 }
	192	};
	193
	194	#endif