[GitHub/mt8127/android_kernel_alcatel_ttab.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;
			/* Fallthrough */
		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,
	},
	{ }
};

void dn_register_sysctl(void)
{
	dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
}

void dn_unregister_sysctl(void)
{
	unregister_net_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(;;) {
06f8fe11 JP	71	switch (*str) {
	72	case ' ':
	73	case '\n':
	74	case '\r':
	75	case ':':
	76	*str = 0;
	77	/* Fallthrough */
	78	case 0:
	79	return;
1da177e4 LT	80	}
	81	str++;
	82	}
	83	}
	84
	85	/*
	86	* Simple routine to parse an ascii DECnet address
	87	* into a network order address.
	88	*/
c4ea94ab	89	static int parse_addr(__le16 addr, char str)
1da177e4	90	{
c4ea94ab	91	__u16 area, node;
1da177e4 LT	92
	93	while(str && !ISNUM(str)) str++;
	94
	95	if (*str == 0)
	96	return -1;
	97
	98	area = (*str++ - '0');
	99	if (ISNUM(*str)) {
	100	area *= 10;
	101	area += (*str++ - '0');
	102	}
	103
	104	if (*str++ != '.')
	105	return -1;
	106
	107	if (!ISNUM(*str))
	108	return -1;
	109
	110	node = *str++ - '0';
	111	if (ISNUM(*str)) {
	112	node *= 10;
	113	node += (*str++ - '0');
	114	}
	115	if (ISNUM(*str)) {
	116	node *= 10;
	117	node += (*str++ - '0');
	118	}
	119	if (ISNUM(*str)) {
	120	node *= 10;
	121	node += (*str++ - '0');
	122	}
	123
	124	if ((node > 1023) \|\| (area > 63))
	125	return -1;
	126
	127	if (INVALID_END_CHAR(*str))
	128	return -1;
	129
c4106aa8	130	*addr = cpu_to_le16((area << 10) \| node);
1da177e4 LT	131
	132	return 0;
	133	}
	134
429eb0fa	135	static int dn_node_address_handler(ctl_table *table, int write,
1da177e4 LT	136	void __user *buffer,
	137	size_t lenp, loff_t ppos)
	138	{
	139	char addr[DN_ASCBUF_LEN];
	140	size_t len;
c4ea94ab	141	__le16 dnaddr;
1da177e4 LT	142
	143	if (!lenp \|\| (ppos && !write)) {
	144	*lenp = 0;
	145	return 0;
	146	}
	147
	148	if (write) {
e57c624b	149	len = (lenp < DN_ASCBUF_LEN) ? lenp : (DN_ASCBUF_LEN-1);
1da177e4 LT	150
	151	if (copy_from_user(addr, buffer, len))
	152	return -EFAULT;
	153
	154	addr[len] = 0;
	155	strip_it(addr);
	156
	157	if (parse_addr(&dnaddr, addr))
	158	return -EINVAL;
	159
	160	dn_dev_devices_off();
	161
	162	decnet_address = dnaddr;
	163
	164	dn_dev_devices_on();
	165
	166	*ppos += len;
	167
	168	return 0;
	169	}
	170
c4106aa8	171	dn_addr2asc(le16_to_cpu(decnet_address), addr);
1da177e4 LT	172	len = strlen(addr);
	173	addr[len++] = '\n';
	174
	175	if (len > lenp) len = lenp;
	176
	177	if (copy_to_user(buffer, addr, len))
	178	return -EFAULT;
	179
	180	*lenp = len;
	181	*ppos += len;
	182
	183	return 0;
	184	}
	185
429eb0fa	186	static int dn_def_dev_handler(ctl_table *table, int write,
1da177e4 LT	187	void __user *buffer,
	188	size_t lenp, loff_t ppos)
	189	{
	190	size_t len;
	191	struct net_device *dev;
	192	char devname[17];
	193
	194	if (!lenp \|\| (ppos && !write)) {
	195	*lenp = 0;
	196	return 0;
	197	}
	198
	199	if (write) {
	200	if (*lenp > 16)
	201	return -E2BIG;
	202
	203	if (copy_from_user(devname, buffer, *lenp))
	204	return -EFAULT;
	205
	206	devname[*lenp] = 0;
	207	strip_it(devname);
	208
881d966b	209	dev = dev_get_by_name(&init_net, devname);
1da177e4 LT	210	if (dev == NULL)
	211	return -ENODEV;
	212
	213	if (dev->dn_ptr == NULL) {
	214	dev_put(dev);
	215	return -ENODEV;
	216	}
	217
	218	if (dn_dev_set_default(dev, 1)) {
	219	dev_put(dev);
	220	return -ENODEV;
	221	}
	222	ppos += lenp;
	223
	224	return 0;
	225	}
	226
	227	dev = dn_dev_get_default();
	228	if (dev == NULL) {
	229	*lenp = 0;
	230	return 0;
	231	}
	232
	233	strcpy(devname, dev->name);
	234	dev_put(dev);
	235	len = strlen(devname);
	236	devname[len++] = '\n';
	237
	238	if (len > lenp) len = lenp;
	239
	240	if (copy_to_user(buffer, devname, len))
	241	return -EFAULT;
	242
	243	*lenp = len;
	244	*ppos += len;
	245
	246	return 0;
	247	}
	248
	249	static ctl_table dn_table[] = {
	250	{
429eb0fa YH	251	.procname = "node_address",
	252	.maxlen = 7,
	253	.mode = 0644,
1da177e4	254	.proc_handler = dn_node_address_handler,
1da177e4 LT	255	},
1da177e4 LT	256	{
1da177e4	257	.procname = "node_name",
429eb0fa	258	.data = node_name,
1da177e4 LT	259	.maxlen = 7,
1da177e4 LT	260	.mode = 0644,
6d9f239a	261	.proc_handler = proc_dostring,
1da177e4 LT	262	},
1da177e4 LT	263	{
429eb0fa YH	264	.procname = "default_device",
429eb0fa YH	265	.maxlen = 16,
1da177e4 LT	266	.mode = 0644,
1da177e4 LT	267	.proc_handler = dn_def_dev_handler,
1da177e4 LT	268	},
1da177e4 LT	269	{
1da177e4 LT	270	.procname = "time_wait",
	271	.data = &decnet_time_wait,
	272	.maxlen = sizeof(int),
	273	.mode = 0644,
6d9f239a	274	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	275	.extra1 = &min_decnet_time_wait,
	276	.extra2 = &max_decnet_time_wait
	277	},
	278	{
1da177e4 LT	279	.procname = "dn_count",
	280	.data = &decnet_dn_count,
	281	.maxlen = sizeof(int),
	282	.mode = 0644,
6d9f239a	283	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	284	.extra1 = &min_state_count,
	285	.extra2 = &max_state_count
	286	},
	287	{
1da177e4 LT	288	.procname = "di_count",
	289	.data = &decnet_di_count,
	290	.maxlen = sizeof(int),
	291	.mode = 0644,
6d9f239a	292	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	293	.extra1 = &min_state_count,
	294	.extra2 = &max_state_count
	295	},
	296	{
1da177e4 LT	297	.procname = "dr_count",
	298	.data = &decnet_dr_count,
	299	.maxlen = sizeof(int),
	300	.mode = 0644,
6d9f239a	301	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	302	.extra1 = &min_state_count,
	303	.extra2 = &max_state_count
	304	},
	305	{
1da177e4 LT	306	.procname = "dst_gc_interval",
	307	.data = &decnet_dst_gc_interval,
	308	.maxlen = sizeof(int),
	309	.mode = 0644,
6d9f239a	310	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	311	.extra1 = &min_decnet_dst_gc_interval,
	312	.extra2 = &max_decnet_dst_gc_interval
	313	},
	314	{
1da177e4 LT	315	.procname = "no_fc_max_cwnd",
	316	.data = &decnet_no_fc_max_cwnd,
	317	.maxlen = sizeof(int),
	318	.mode = 0644,
6d9f239a	319	.proc_handler = proc_dointvec_minmax,
1da177e4 LT	320	.extra1 = &min_decnet_no_fc_max_cwnd,
	321	.extra2 = &max_decnet_no_fc_max_cwnd
	322	},
1f12bcc9	323	{
429eb0fa YH	324	.procname = "decnet_mem",
	325	.data = &sysctl_decnet_mem,
	326	.maxlen = sizeof(sysctl_decnet_mem),
	327	.mode = 0644,
8d987e5c	328	.proc_handler = proc_doulongvec_minmax
429eb0fa YH	329	},
429eb0fa YH	330	{
429eb0fa YH	331	.procname = "decnet_rmem",
	332	.data = &sysctl_decnet_rmem,
	333	.maxlen = sizeof(sysctl_decnet_rmem),
	334	.mode = 0644,
6d9f239a	335	.proc_handler = proc_dointvec,
429eb0fa YH	336	},
429eb0fa YH	337	{
429eb0fa YH	338	.procname = "decnet_wmem",
	339	.data = &sysctl_decnet_wmem,
	340	.maxlen = sizeof(sysctl_decnet_wmem),
	341	.mode = 0644,
6d9f239a	342	.proc_handler = proc_dointvec,
429eb0fa	343	},
1da177e4	344	{
1da177e4 LT	345	.procname = "debug",
	346	.data = &decnet_debug_level,
	347	.maxlen = sizeof(int),
	348	.mode = 0644,
6d9f239a	349	.proc_handler = proc_dointvec,
1da177e4	350	},
f8572d8f	351	{ }
1da177e4 LT	352	};
1da177e4 LT	353
1da177e4 LT	354	void dn_register_sysctl(void)
1da177e4 LT	355	{
9bdcc88f	356	dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
1da177e4 LT	357	}
	358
	359	void dn_unregister_sysctl(void)
	360	{
5dd3df10	361	unregister_net_sysctl_table(dn_table_header);
1da177e4 LT	362	}
	363
	364	#else /* CONFIG_SYSCTL */
	365	void dn_unregister_sysctl(void)
	366	{
	367	}
	368	void dn_register_sysctl(void)
	369	{
	370	}
	371
	372	#endif