[net-next-2.6.git] / net / decnet / sysctl_net_decnet.c

/*
 * DECnet       An implementation of the DECnet protocol suite for the LINUX
 *              operating system.  DECnet is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              DECnet sysctl support functions
 *
 * Author:      Steve Whitehouse <SteveW@ACM.org>
 *
 *
 * Changes:
 * Steve Whitehouse - C99 changes and default device handling
 * Steve Whitehouse - Memory buffer settings, like the tcp ones
 *
 */
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/fs.h>
#include <linux/netdevice.h>
#include <linux/string.h>
#include <net/neighbour.h>
#include <net/dst.h>
#include <net/flow.h>

#include <asm/uaccess.h>

#include <net/dn.h>
#include <net/dn_dev.h>
#include <net/dn_route.h>


int decnet_debug_level;
int decnet_time_wait = 30;
int decnet_dn_count = 1;
int decnet_di_count = 3;
int decnet_dr_count = 3;
int decnet_log_martians = 1;
int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;

/* Reasonable defaults, I hope, based on tcp's defaults */
long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };

#ifdef CONFIG_SYSCTL
extern int decnet_dst_gc_interval;
static int min_decnet_time_wait[] = { 5 };
static int max_decnet_time_wait[] = { 600 };
static int min_state_count[] = { 1 };
static int max_state_count[] = { NSP_MAXRXTSHIFT };
static int min_decnet_dst_gc_interval[] = { 1 };
static int max_decnet_dst_gc_interval[] = { 60 };
static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };
static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };
static char node_name[7] = "???";

static struct ctl_table_header *dn_table_header = NULL;

/*
 * ctype.h :-)
 */
#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
#define ISALPHA(x) (ISLOWER(x) || ISUPPER(x))
#define INVALID_END_CHAR(x) (ISNUM(x) || ISALPHA(x))

static void strip_it(char *str)
{
	for(;;) {
		switch(*str) {
			case ' ':
			case '\n':
			case '\r':
			case ':':
				*str = 0;
			case 0:
				return;
		}
		str++;
	}
}

/*
 * Simple routine to parse an ascii DECnet address
 * into a network order address.
 */
static int parse_addr(__le16 *addr, char *str)
{
	__u16 area, node;

	while(*str && !ISNUM(*str)) str++;

	if (*str == 0)
		return -1;

	area = (*str++ - '0');
	if (ISNUM(*str)) {
		area *= 10;
		area += (*str++ - '0');
	}

	if (*str++ != '.')
		return -1;

	if (!ISNUM(*str))
		return -1;

	node = *str++ - '0';
	if (ISNUM(*str)) {
		node *= 10;
		node += (*str++ - '0');
	}
	if (ISNUM(*str)) {
		node *= 10;
		node += (*str++ - '0');
	}
	if (ISNUM(*str)) {
		node *= 10;
		node += (*str++ - '0');
	}

	if ((node > 1023) || (area > 63))
		return -1;

	if (INVALID_END_CHAR(*str))
		return -1;

	*addr = cpu_to_le16((area << 10) | node);

	return 0;
}

static int dn_node_address_handler(ctl_table *table, int write,
				void __user *buffer,
				size_t *lenp, loff_t *ppos)
{
	char addr[DN_ASCBUF_LEN];
	size_t len;
	__le16 dnaddr;

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}

	if (write) {
		len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);

		if (copy_from_user(addr, buffer, len))
			return -EFAULT;

		addr[len] = 0;
		strip_it(addr);

		if (parse_addr(&dnaddr, addr))
			return -EINVAL;

		dn_dev_devices_off();

		decnet_address = dnaddr;

		dn_dev_devices_on();

		*ppos += len;

		return 0;
	}

	dn_addr2asc(le16_to_cpu(decnet_address), addr);
	len = strlen(addr);
	addr[len++] = '\n';

	if (len > *lenp) len = *lenp;

	if (copy_to_user(buffer, addr, len))
		return -EFAULT;

	*lenp = len;
	*ppos += len;

	return 0;
}

static int dn_def_dev_handler(ctl_table *table, int write,
				void __user *buffer,
				size_t *lenp, loff_t *ppos)
{
	size_t len;
	struct net_device *dev;
	char devname[17];

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}

	if (write) {
		if (*lenp > 16)
			return -E2BIG;

		if (copy_from_user(devname, buffer, *lenp))
			return -EFAULT;

		devname[*lenp] = 0;
		strip_it(devname);

		dev = dev_get_by_name(&init_net, devname);
		if (dev == NULL)
			return -ENODEV;

		if (dev->dn_ptr == NULL) {
			dev_put(dev);
			return -ENODEV;
		}

		if (dn_dev_set_default(dev, 1)) {
			dev_put(dev);
			return -ENODEV;
		}
		*ppos += *lenp;

		return 0;
	}

	dev = dn_dev_get_default();
	if (dev == NULL) {
		*lenp = 0;
		return 0;
	}

	strcpy(devname, dev->name);
	dev_put(dev);
	len = strlen(devname);
	devname[len++] = '\n';

	if (len > *lenp) len = *lenp;

	if (copy_to_user(buffer, devname, len))
		return -EFAULT;

	*lenp = len;
	*ppos += len;

	return 0;
}

static ctl_table dn_table[] = {
	{
		.procname = "node_address",
		.maxlen = 7,
		.mode = 0644,
		.proc_handler = dn_node_address_handler,
	},
	{
		.procname = "node_name",
		.data = node_name,
		.maxlen = 7,
		.mode = 0644,
		.proc_handler = proc_dostring,
	},
	{
		.procname = "default_device",
		.maxlen = 16,
		.mode = 0644,
		.proc_handler = dn_def_dev_handler,
	},
	{
		.procname = "time_wait",
		.data = &decnet_time_wait,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_decnet_time_wait,
		.extra2 = &max_decnet_time_wait
	},
	{
		.procname = "dn_count",
		.data = &decnet_dn_count,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_state_count,
		.extra2 = &max_state_count
	},
	{
		.procname = "di_count",
		.data = &decnet_di_count,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_state_count,
		.extra2 = &max_state_count
	},
	{
		.procname = "dr_count",
		.data = &decnet_dr_count,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_state_count,
		.extra2 = &max_state_count
	},
	{
		.procname = "dst_gc_interval",
		.data = &decnet_dst_gc_interval,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_decnet_dst_gc_interval,
		.extra2 = &max_decnet_dst_gc_interval
	},
	{
		.procname = "no_fc_max_cwnd",
		.data = &decnet_no_fc_max_cwnd,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax,
		.extra1 = &min_decnet_no_fc_max_cwnd,
		.extra2 = &max_decnet_no_fc_max_cwnd
	},
       {
		.procname = "decnet_mem",
		.data = &sysctl_decnet_mem,
		.maxlen = sizeof(sysctl_decnet_mem),
		.mode = 0644,
		.proc_handler = proc_doulongvec_minmax
	},
	{
		.procname = "decnet_rmem",
		.data = &sysctl_decnet_rmem,
		.maxlen = sizeof(sysctl_decnet_rmem),
		.mode = 0644,
		.proc_handler = proc_dointvec,
	},
	{
		.procname = "decnet_wmem",
		.data = &sysctl_decnet_wmem,
		.maxlen = sizeof(sysctl_decnet_wmem),
		.mode = 0644,
		.proc_handler = proc_dointvec,
	},
	{
		.procname = "debug",
		.data = &decnet_debug_level,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec,
	},
	{ }
};

static struct ctl_path dn_path[] = {
	{ .procname = "net", },
	{ .procname = "decnet", },
	{ }
};

void dn_register_sysctl(void)
{
	dn_table_header = register_sysctl_paths(dn_path, dn_table);
}

void dn_unregister_sysctl(void)
{
	unregister_sysctl_table(dn_table_header);
}

#else  /* CONFIG_SYSCTL */
void dn_unregister_sysctl(void)
{
}
void dn_register_sysctl(void)
{
}

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* DECnet An implementation of the DECnet protocol suite for the LINUX
	3	* operating system. DECnet is implemented using the BSD Socket
	4	* interface as the means of communication with the user level.
	5	*
	6	* DECnet sysctl support functions
	7	*
	8	* Author: Steve Whitehouse <SteveW@ACM.org>
	9	*
	10	*
	11	* Changes:
	12	* Steve Whitehouse - C99 changes and default device handling
1f12bcc9	13	* Steve Whitehouse - Memory buffer settings, like the tcp ones
1da177e4 LT	14	*
1da177e4 LT	15	*/
1da177e4 LT	16	#include <linux/mm.h>
	17	#include <linux/sysctl.h>
	18	#include <linux/fs.h>
	19	#include <linux/netdevice.h>
	20	#include <linux/string.h>
	21	#include <net/neighbour.h>
	22	#include <net/dst.h>
	23	#include <net/flow.h>
	24
	25	#include <asm/uaccess.h>
	26
	27	#include <net/dn.h>
	28	#include <net/dn_dev.h>
	29	#include <net/dn_route.h>
	30
	31
	32	int decnet_debug_level;
	33	int decnet_time_wait = 30;
	34	int decnet_dn_count = 1;
	35	int decnet_di_count = 3;
	36	int decnet_dr_count = 3;
	37	int decnet_log_martians = 1;
	38	int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;
	39
1f12bcc9	40	/* Reasonable defaults, I hope, based on tcp's defaults */
8d987e5c	41	long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
1f12bcc9 SW	42	int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
	43	int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
	44
1da177e4 LT	45	#ifdef CONFIG_SYSCTL
	46	extern int decnet_dst_gc_interval;
	47	static int min_decnet_time_wait[] = { 5 };
	48	static int max_decnet_time_wait[] = { 600 };
	49	static int min_state_count[] = { 1 };
	50	static int max_state_count[] = { NSP_MAXRXTSHIFT };
	51	static int min_decnet_dst_gc_interval[] = { 1 };
	52	static int max_decnet_dst_gc_interval[] = { 60 };
	53	static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };
	54	static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };
	55	static char node_name[7] = "???";
	56
	57	static struct ctl_table_header *dn_table_header = NULL;
	58
	59	/*
	60	* ctype.h :-)
	61	*/
	62	#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
	63	#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
	64	#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
	65	#define ISALPHA(x) (ISLOWER(x) \|\| ISUPPER(x))
	66	#define INVALID_END_CHAR(x) (ISNUM(x) \|\| ISALPHA(x))
	67
	68	static void strip_it(char *str)
	69	{
	70	for(;;) {
	71	switch(*str) {
	72	case ' ':
	73	case '\n':
	74	case '\r':
	75	case ':':
	76	*str = 0;
	77	case 0:
	78	return;
	79	}
	80	str++;
	81	}
	82	}
	83
	84	/*
	85	* Simple routine to parse an ascii DECnet address
	86	* into a network order address.
	87	*/
c4ea94ab	88	static int parse_addr(__le16 addr, char str)
1da177e4	89	{
c4ea94ab	90	__u16 area, node;
1da177e4 LT	91
	92	while(str && !ISNUM(str)) str++;
	93
	94	if (*str == 0)
	95	return -1;
	96
	97	area = (*str++ - '0');
	98	if (ISNUM(*str)) {
	99	area *= 10;
	100	area += (*str++ - '0');
	101	}
	102
	103	if (*str++ != '.')
	104	return -1;
	105
	106	if (!ISNUM(*str))
	107	return -1;
	108
	109	node = *str++ - '0';
	110	if (ISNUM(*str)) {
	111	node *= 10;
	112	node += (*str++ - '0');
	113	}
	114	if (ISNUM(*str)) {
	115	node *= 10;
	116	node += (*str++ - '0');
	117	}
	118	if (ISNUM(*str)) {
	119	node *= 10;
	120	node += (*str++ - '0');
	121	}
	122
	123	if ((node > 1023) \|\| (area > 63))
	124	return -1;
	125
	126	if (INVALID_END_CHAR(*str))
	127	return -1;
	128
c4106aa8	129	*addr = cpu_to_le16((area << 10) \| node);
1da177e4 LT	130
	131	return 0;
	132	}
	133
429eb0fa	134	static int dn_node_address_handler(ctl_table *table, int write,
1da177e4 LT	135	void __user *buffer,
	136	size_t lenp, loff_t ppos)
	137	{
	138	char addr[DN_ASCBUF_LEN];
	139	size_t len;
c4ea94ab	140	__le16 dnaddr;
1da177e4 LT	141
	142	if (!lenp \|\| (ppos && !write)) {
	143	*lenp = 0;
	144	return 0;
	145	}
	146
	147	if (write) {
e57c624b	148	len = (lenp < DN_ASCBUF_LEN) ? lenp : (DN_ASCBUF_LEN-1);
1da177e4 LT	149
	150	if (copy_from_user(addr, buffer, len))
	151	return -EFAULT;
	152
	153	addr[len] = 0;
	154	strip_it(addr);
	155
	156	if (parse_addr(&dnaddr, addr))
	157	return -EINVAL;
	158
	159	dn_dev_devices_off();
	160
	161	decnet_address = dnaddr;
	162
	163	dn_dev_devices_on();
	164
	165	*ppos += len;
	166
	167	return 0;
	168	}
	169
c4106aa8	170	dn_addr2asc(le16_to_cpu(decnet_address), addr);
1da177e4 LT	171	len = strlen(addr);
	172	addr[len++] = '\n';
	173
	174	if (len > lenp) len = lenp;
	175
	176	if (copy_to_user(buffer, addr, len))
	177	return -EFAULT;
	178
	179	*lenp = len;
	180	*ppos += len;
	181
	182	return 0;
	183	}
	184
429eb0fa	185	static int dn_def_dev_handler(ctl_table *table, int write,
1da177e4 LT	186	void __user *buffer,
	187	size_t lenp, loff_t ppos)
	188	{
	189	size_t len;
	190	struct net_device *dev;
	191	char devname[17];
	192
	193	if (!lenp \|\| (ppos && !write)) {
	194	*lenp = 0;
	195	return 0;
	196	}
	197
	198	if (write) {
	199	if (*lenp > 16)
	200	return -E2BIG;
	201
	202	if (copy_from_user(devname, buffer, *lenp))
	203	return -EFAULT;
	204
	205	devname[*lenp] = 0;
	206	strip_it(devname);
	207
881d966b	208	dev = dev_get_by_name(&init_net, devname);
1da177e4 LT	209	if (dev == NULL)
	210	return -ENODEV;
	211
	212	if (dev->dn_ptr == NULL) {
	213	dev_put(dev);
	214	return -ENODEV;
	215	}
	216
	217	if (dn_dev_set_default(dev, 1)) {
	218	dev_put(dev);
	219	return -ENODEV;
	220	}
	221	ppos += lenp;
	222
	223	return 0;
	224	}
	225
	226	dev = dn_dev_get_default();
	227	if (dev == NULL) {
	228	*lenp = 0;
	229	return 0;
	230	}
	231
	232	strcpy(devname, dev->name);
	233	dev_put(dev);
	234	len = strlen(devname);
	235	devname[len++] = '\n';
	236
	237	if (len > lenp) len = lenp;
	238
	239	if (copy_to_user(buffer, devname, len))
	240	return -EFAULT;
	241
	242	*lenp = len;
	243	*ppos += len;
	244
	245	return 0;
	246	}
	247
	248	static ctl_table dn_table[] = {
	249	{
429eb0fa YH	250	.procname = "node_address",
	251	.maxlen = 7,
	252	.mode = 0644,
1da177e4	253	.proc_handler = dn_node_address_handler,
1da177e4 LT	254	},
1da177e4 LT	255	{
1da177e4	256	.procname = "node_name",
429eb0fa	257	.data = node_name,
1da177e4 LT	258	.maxlen = 7,
1da177e4 LT	259	.mode = 0644,
6d9f239a	260	.proc_handler = proc_dostring,
1da177e4 LT	261	},
1da177e4 LT	262	{
429eb0fa YH	263	.procname = "default_device",
429eb0fa YH	264	.maxlen = 16,
1da177e4 LT	265	.mode = 0644,
1da177e4 LT	266	.proc_handler = dn_def_dev_handler,
1da177e4 LT	267	},
1da177e4 LT	268	{
1da177e4 LT	269	.procname = "time_wait",
	270	.data = &decnet_time_wait,
	271	.maxlen = sizeof(int),
	272	.mode = 0644,
6d9f239a	273	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	274	.extra1 = &min_decnet_time_wait,
	275	.extra2 = &max_decnet_time_wait
	276	},
	277	{
1da177e4 LT	278	.procname = "dn_count",
	279	.data = &decnet_dn_count,
	280	.maxlen = sizeof(int),
	281	.mode = 0644,
6d9f239a	282	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	283	.extra1 = &min_state_count,
	284	.extra2 = &max_state_count
	285	},
	286	{
1da177e4 LT	287	.procname = "di_count",
	288	.data = &decnet_di_count,
	289	.maxlen = sizeof(int),
	290	.mode = 0644,
6d9f239a	291	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	292	.extra1 = &min_state_count,
	293	.extra2 = &max_state_count
	294	},
	295	{
1da177e4 LT	296	.procname = "dr_count",
	297	.data = &decnet_dr_count,
	298	.maxlen = sizeof(int),
	299	.mode = 0644,
6d9f239a	300	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	301	.extra1 = &min_state_count,
	302	.extra2 = &max_state_count
	303	},
	304	{
1da177e4 LT	305	.procname = "dst_gc_interval",
	306	.data = &decnet_dst_gc_interval,
	307	.maxlen = sizeof(int),
	308	.mode = 0644,
6d9f239a	309	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	310	.extra1 = &min_decnet_dst_gc_interval,
	311	.extra2 = &max_decnet_dst_gc_interval
	312	},
	313	{
1da177e4 LT	314	.procname = "no_fc_max_cwnd",
	315	.data = &decnet_no_fc_max_cwnd,
	316	.maxlen = sizeof(int),
	317	.mode = 0644,
6d9f239a	318	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	319	.extra1 = &min_decnet_no_fc_max_cwnd,
	320	.extra2 = &max_decnet_no_fc_max_cwnd
	321	},
1f12bcc9	322	{
429eb0fa YH	323	.procname = "decnet_mem",
	324	.data = &sysctl_decnet_mem,
	325	.maxlen = sizeof(sysctl_decnet_mem),
	326	.mode = 0644,
8d987e5c	327	.proc_handler = proc_doulongvec_minmax
429eb0fa YH	328	},
429eb0fa YH	329	{
429eb0fa YH	330	.procname = "decnet_rmem",
	331	.data = &sysctl_decnet_rmem,
	332	.maxlen = sizeof(sysctl_decnet_rmem),
	333	.mode = 0644,
6d9f239a	334	.proc_handler = proc_dointvec,
429eb0fa YH	335	},
429eb0fa YH	336	{
429eb0fa YH	337	.procname = "decnet_wmem",
	338	.data = &sysctl_decnet_wmem,
	339	.maxlen = sizeof(sysctl_decnet_wmem),
	340	.mode = 0644,
6d9f239a	341	.proc_handler = proc_dointvec,
429eb0fa	342	},
1da177e4	343	{
1da177e4 LT	344	.procname = "debug",
	345	.data = &decnet_debug_level,
	346	.maxlen = sizeof(int),
	347	.mode = 0644,
6d9f239a	348	.proc_handler = proc_dointvec,
1da177e4	349	},
f8572d8f	350	{ }
1da177e4 LT	351	};
1da177e4 LT	352
3151a9ab	353	static struct ctl_path dn_path[] = {
f8572d8f EB	354	{ .procname = "net", },
f8572d8f EB	355	{ .procname = "decnet", },
3151a9ab	356	{ }
1da177e4 LT	357	};
	358
	359	void dn_register_sysctl(void)
	360	{
3151a9ab	361	dn_table_header = register_sysctl_paths(dn_path, dn_table);
1da177e4 LT	362	}
	363
	364	void dn_unregister_sysctl(void)
	365	{
	366	unregister_sysctl_table(dn_table_header);
	367	}
	368
	369	#else /* CONFIG_SYSCTL */
	370	void dn_unregister_sysctl(void)
	371	{
	372	}
	373	void dn_register_sysctl(void)
	374	{
	375	}
	376
	377	#endif