363 строки
7.1 KiB
C
363 строки
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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 <linux/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(struct ctl_table *table, int write,
|
|
void *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);
|
|
memcpy(addr, buffer, len);
|
|
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;
|
|
memcpy(buffer, addr, len);
|
|
*lenp = len;
|
|
*ppos += len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dn_def_dev_handler(struct ctl_table *table, int write,
|
|
void *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;
|
|
|
|
memcpy(devname, buffer, *lenp);
|
|
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;
|
|
|
|
memcpy(buffer, devname, len);
|
|
*lenp = len;
|
|
*ppos += len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct 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
|