sysctl_net_decnet.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:8k
- /*
- * 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:
- *
- */
- #include <linux/config.h>
- #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 <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;
- #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(dn_address *addr, char *str)
- {
- dn_address 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 *name, int nlen,
- void *oldval, size_t *oldlenp,
- void *newval, size_t newlen,
- void **context)
- {
- size_t len;
- dn_address 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, (unsigned short *)oldval))
- return -EFAULT;
- }
- }
- if (newval && newlen) {
- if (newlen != sizeof(unsigned short))
- return -EINVAL;
- if (get_user(addr, (unsigned short *)newval))
- return -EFAULT;
- dn_dev_devices_off();
- decnet_address = addr;
- dn_dn2eth(decnet_ether_address, dn_ntohs(decnet_address));
- dn_dev_devices_on();
- }
- return 0;
- }
- static int dn_node_address_handler(ctl_table *table, int write,
- struct file *filp,
- void *buffer, size_t *lenp)
- {
- char addr[DN_ASCBUF_LEN];
- size_t len;
- dn_address dnaddr;
- if (!*lenp || (filp->f_pos && !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_dn2eth(decnet_ether_address, dn_ntohs(decnet_address));
- dn_dev_devices_on();
- filp->f_pos += 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;
- filp->f_pos += len;
- return 0;
- }
- static int dn_def_dev_strategy(ctl_table *table, int *name, int nlen,
- void *oldval, size_t *oldlenp,
- void *newval, size_t newlen,
- void **context)
- {
- size_t len;
- struct net_device *dev = decnet_default_device;
- char devname[17];
- size_t namel;
- devname[0] = 0;
- if (oldval && oldlenp) {
- if (get_user(len, oldlenp))
- return -EFAULT;
- if (len) {
- if (dev)
- strcpy(devname, dev->name);
- 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;
- if ((dev = __dev_get_by_name(devname)) == NULL)
- return -ENODEV;
- if (dev->dn_ptr == NULL)
- return -ENODEV;
- decnet_default_device = dev;
- }
- return 0;
- }
- static int dn_def_dev_handler(ctl_table *table, int write,
- struct file * filp,
- void *buffer, size_t *lenp)
- {
- size_t len;
- struct net_device *dev = decnet_default_device;
- char devname[17];
- if (!*lenp || (filp->f_pos && !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);
- if ((dev = __dev_get_by_name(devname)) == NULL)
- return -ENODEV;
- if (dev->dn_ptr == NULL)
- return -ENODEV;
- decnet_default_device = dev;
- filp->f_pos += *lenp;
- return 0;
- }
- if (dev == NULL) {
- *lenp = 0;
- return 0;
- }
- strcpy(devname, dev->name);
- len = strlen(devname);
- devname[len++] = 'n';
- if (len > *lenp) len = *lenp;
- if (copy_to_user(buffer, devname, len))
- return -EFAULT;
- *lenp = len;
- filp->f_pos += len;
- return 0;
- }
- static ctl_table dn_table[] = {
- {NET_DECNET_NODE_ADDRESS, "node_address", NULL, 7, 0644, NULL,
- dn_node_address_handler, dn_node_address_strategy, NULL,
- NULL, NULL},
- {NET_DECNET_NODE_NAME, "node_name", node_name, 7, 0644, NULL,
- &proc_dostring, &sysctl_string, NULL, NULL, NULL},
- {NET_DECNET_DEFAULT_DEVICE, "default_device", NULL, 16, 0644, NULL,
- dn_def_dev_handler, dn_def_dev_strategy, NULL, NULL, NULL},
- {NET_DECNET_TIME_WAIT, "time_wait", &decnet_time_wait,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_decnet_time_wait, &max_decnet_time_wait},
- {NET_DECNET_DN_COUNT, "dn_count", &decnet_dn_count,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_state_count, &max_state_count},
- {NET_DECNET_DI_COUNT, "di_count", &decnet_di_count,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_state_count, &max_state_count},
- {NET_DECNET_DR_COUNT, "dr_count", &decnet_dr_count,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_state_count, &max_state_count},
- {NET_DECNET_DST_GC_INTERVAL, "dst_gc_interval", &decnet_dst_gc_interval,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_decnet_dst_gc_interval, &max_decnet_dst_gc_interval},
- {NET_DECNET_NO_FC_MAX_CWND, "no_fc_max_cwnd", &decnet_no_fc_max_cwnd,
- sizeof(int), 0644,
- NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
- &min_decnet_no_fc_max_cwnd, &max_decnet_no_fc_max_cwnd},
- {NET_DECNET_DEBUG_LEVEL, "debug", &decnet_debug_level,
- sizeof(int), 0644,
- NULL, &proc_dointvec, &sysctl_intvec, NULL,
- NULL, NULL},
- {0}
- };
- static ctl_table dn_dir_table[] = {
- {NET_DECNET, "decnet", NULL, 0, 0555, dn_table},
- {0}
- };
- static ctl_table dn_root_table[] = {
- {CTL_NET, "net", NULL, 0, 0555, dn_dir_table},
- {0}
- };
- void dn_register_sysctl(void)
- {
- dn_table_header = register_sysctl_table(dn_root_table, 1);
- }
- 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