mirror of https://gitee.com/openkylin/linux.git
511 lines
10 KiB
C
511 lines
10 KiB
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 */
|
|
int 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 = dn_htons((area << 10) | node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int dn_node_address_strategy(ctl_table *table, int __user *name, int nlen,
|
|
void __user *oldval, size_t __user *oldlenp,
|
|
void __user *newval, size_t newlen)
|
|
{
|
|
size_t len;
|
|
__le16 addr;
|
|
|
|
if (oldval && oldlenp) {
|
|
if (get_user(len, oldlenp))
|
|
return -EFAULT;
|
|
if (len) {
|
|
if (len != sizeof(unsigned short))
|
|
return -EINVAL;
|
|
if (put_user(decnet_address, (__le16 __user *)oldval))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
if (newval && newlen) {
|
|
if (newlen != sizeof(unsigned short))
|
|
return -EINVAL;
|
|
if (get_user(addr, (__le16 __user *)newval))
|
|
return -EFAULT;
|
|
|
|
dn_dev_devices_off();
|
|
|
|
decnet_address = addr;
|
|
|
|
dn_dev_devices_on();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dn_node_address_handler(ctl_table *table, int write,
|
|
struct file *filp,
|
|
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) {
|
|
int 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(dn_ntohs(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_strategy(ctl_table *table, int __user *name, int nlen,
|
|
void __user *oldval, size_t __user *oldlenp,
|
|
void __user *newval, size_t newlen)
|
|
{
|
|
size_t len;
|
|
struct net_device *dev;
|
|
char devname[17];
|
|
size_t namel;
|
|
int rv = 0;
|
|
|
|
devname[0] = 0;
|
|
|
|
if (oldval && oldlenp) {
|
|
if (get_user(len, oldlenp))
|
|
return -EFAULT;
|
|
if (len) {
|
|
dev = dn_dev_get_default();
|
|
if (dev) {
|
|
strcpy(devname, dev->name);
|
|
dev_put(dev);
|
|
}
|
|
|
|
namel = strlen(devname) + 1;
|
|
if (len > namel) len = namel;
|
|
|
|
if (copy_to_user(oldval, devname, len))
|
|
return -EFAULT;
|
|
|
|
if (put_user(len, oldlenp))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
if (newval && newlen) {
|
|
if (newlen > 16)
|
|
return -E2BIG;
|
|
|
|
if (copy_from_user(devname, newval, newlen))
|
|
return -EFAULT;
|
|
|
|
devname[newlen] = 0;
|
|
|
|
dev = dev_get_by_name(&init_net, devname);
|
|
if (dev == NULL)
|
|
return -ENODEV;
|
|
|
|
rv = -ENODEV;
|
|
if (dev->dn_ptr != NULL) {
|
|
rv = dn_dev_set_default(dev, 1);
|
|
if (rv)
|
|
dev_put(dev);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
static int dn_def_dev_handler(ctl_table *table, int write,
|
|
struct file * filp,
|
|
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[] = {
|
|
{
|
|
.ctl_name = NET_DECNET_NODE_ADDRESS,
|
|
.procname = "node_address",
|
|
.maxlen = 7,
|
|
.mode = 0644,
|
|
.proc_handler = dn_node_address_handler,
|
|
.strategy = dn_node_address_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_NODE_NAME,
|
|
.procname = "node_name",
|
|
.data = node_name,
|
|
.maxlen = 7,
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dostring,
|
|
.strategy = &sysctl_string,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DEFAULT_DEVICE,
|
|
.procname = "default_device",
|
|
.maxlen = 16,
|
|
.mode = 0644,
|
|
.proc_handler = dn_def_dev_handler,
|
|
.strategy = dn_def_dev_strategy,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_TIME_WAIT,
|
|
.procname = "time_wait",
|
|
.data = &decnet_time_wait,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_decnet_time_wait,
|
|
.extra2 = &max_decnet_time_wait
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DN_COUNT,
|
|
.procname = "dn_count",
|
|
.data = &decnet_dn_count,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_state_count,
|
|
.extra2 = &max_state_count
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DI_COUNT,
|
|
.procname = "di_count",
|
|
.data = &decnet_di_count,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_state_count,
|
|
.extra2 = &max_state_count
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DR_COUNT,
|
|
.procname = "dr_count",
|
|
.data = &decnet_dr_count,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_state_count,
|
|
.extra2 = &max_state_count
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DST_GC_INTERVAL,
|
|
.procname = "dst_gc_interval",
|
|
.data = &decnet_dst_gc_interval,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_decnet_dst_gc_interval,
|
|
.extra2 = &max_decnet_dst_gc_interval
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_NO_FC_MAX_CWND,
|
|
.procname = "no_fc_max_cwnd",
|
|
.data = &decnet_no_fc_max_cwnd,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_minmax,
|
|
.strategy = &sysctl_intvec,
|
|
.extra1 = &min_decnet_no_fc_max_cwnd,
|
|
.extra2 = &max_decnet_no_fc_max_cwnd
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_MEM,
|
|
.procname = "decnet_mem",
|
|
.data = &sysctl_decnet_mem,
|
|
.maxlen = sizeof(sysctl_decnet_mem),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
.strategy = &sysctl_intvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_RMEM,
|
|
.procname = "decnet_rmem",
|
|
.data = &sysctl_decnet_rmem,
|
|
.maxlen = sizeof(sysctl_decnet_rmem),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
.strategy = &sysctl_intvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_WMEM,
|
|
.procname = "decnet_wmem",
|
|
.data = &sysctl_decnet_wmem,
|
|
.maxlen = sizeof(sysctl_decnet_wmem),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
.strategy = &sysctl_intvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_DECNET_DEBUG_LEVEL,
|
|
.procname = "debug",
|
|
.data = &decnet_debug_level,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
.strategy = &sysctl_intvec,
|
|
},
|
|
{0}
|
|
};
|
|
|
|
static ctl_table dn_dir_table[] = {
|
|
{
|
|
.ctl_name = NET_DECNET,
|
|
.procname = "decnet",
|
|
.mode = 0555,
|
|
.child = dn_table},
|
|
{0}
|
|
};
|
|
|
|
static ctl_table dn_root_table[] = {
|
|
{
|
|
.ctl_name = CTL_NET,
|
|
.procname = "net",
|
|
.mode = 0555,
|
|
.child = dn_dir_table
|
|
},
|
|
{0}
|
|
};
|
|
|
|
void dn_register_sysctl(void)
|
|
{
|
|
dn_table_header = register_sysctl_table(dn_root_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
|