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net/decnet/dn_dev.c
32.3 KB
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/* * 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 Device Layer * * Authors: Steve Whitehouse <SteveW@ACM.org> * Eduardo Marcelo Serrat <emserrat@geocities.com> * * Changes: * Steve Whitehouse : Devices now see incoming frames so they * can mark on who it came from. * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour * can now have a device specific setup func. * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/ * Steve Whitehouse : Fixed bug which sometimes killed timer * Steve Whitehouse : Multiple ifaddr support * Steve Whitehouse : SIOCGIFCONF is now a compile time option * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding * Steve Whitehouse : Removed timer1 - it's a user space issue now * Patrick Caulfield : Fixed router hello message format * Steve Whitehouse : Got rid of constant sizes for blksize for * devices. All mtu based now. */ |
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#include <linux/capability.h> |
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#include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/net.h> #include <linux/netdevice.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/timer.h> #include <linux/string.h> |
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#include <linux/if_addr.h> |
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#include <linux/if_arp.h> #include <linux/if_ether.h> #include <linux/skbuff.h> |
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#include <linux/sysctl.h> #include <linux/notifier.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <asm/uaccess.h> |
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#include <net/net_namespace.h> |
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#include <net/neighbour.h> #include <net/dst.h> #include <net/flow.h> |
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#include <net/fib_rules.h> |
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#include <net/netlink.h> |
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#include <net/dn.h> #include <net/dn_dev.h> #include <net/dn_route.h> #include <net/dn_neigh.h> #include <net/dn_fib.h> #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; extern struct neigh_table dn_neigh_table; /* * decnet_address is kept in network order. */ |
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__le16 decnet_address = 0; |
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static DEFINE_SPINLOCK(dndev_lock); |
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static struct net_device *decnet_default_device; |
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static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
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static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); static void dn_dev_delete(struct net_device *dev); |
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static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
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static int dn_eth_up(struct net_device *); static void dn_eth_down(struct net_device *); static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); static struct dn_dev_parms dn_dev_list[] = { { .type = ARPHRD_ETHER, /* Ethernet */ .mode = DN_DEV_BCAST, .state = DN_DEV_S_RU, .t2 = 1, .t3 = 10, .name = "ethernet", |
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.up = dn_eth_up, .down = dn_eth_down, .timer3 = dn_send_brd_hello, }, { .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ .mode = DN_DEV_BCAST, .state = DN_DEV_S_RU, .t2 = 1, .t3 = 10, .name = "ipgre", |
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.timer3 = dn_send_brd_hello, }, #if 0 { .type = ARPHRD_X25, /* Bog standard X.25 */ .mode = DN_DEV_UCAST, .state = DN_DEV_S_DS, .t2 = 1, .t3 = 120, .name = "x25", |
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.timer3 = dn_send_ptp_hello, }, #endif #if 0 { .type = ARPHRD_PPP, /* DECnet over PPP */ .mode = DN_DEV_BCAST, .state = DN_DEV_S_RU, .t2 = 1, .t3 = 10, .name = "ppp", |
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.timer3 = dn_send_brd_hello, }, #endif { .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ .mode = DN_DEV_UCAST, .state = DN_DEV_S_DS, .t2 = 1, .t3 = 120, .name = "ddcmp", |
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.timer3 = dn_send_ptp_hello, }, { .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ .mode = DN_DEV_BCAST, .state = DN_DEV_S_RU, .t2 = 1, .t3 = 10, .name = "loopback", |
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.timer3 = dn_send_brd_hello, } }; |
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#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
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#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
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#ifdef CONFIG_SYSCTL static int min_t2[] = { 1 }; static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ static int min_t3[] = { 1 }; static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ static int min_priority[1]; static int max_priority[] = { 127 }; /* From DECnet spec */ |
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static int dn_forwarding_proc(struct ctl_table *, int, |
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void __user *, size_t *, loff_t *); |
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static struct dn_dev_sysctl_table { struct ctl_table_header *sysctl_header; |
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struct ctl_table dn_dev_vars[5]; |
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} dn_dev_sysctl = { NULL, { { |
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.procname = "forwarding", .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), .maxlen = sizeof(int), .mode = 0644, .proc_handler = dn_forwarding_proc, |
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}, { |
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.procname = "priority", .data = (void *)DN_DEV_PARMS_OFFSET(priority), .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_priority, .extra2 = &max_priority }, { |
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.procname = "t2", .data = (void *)DN_DEV_PARMS_OFFSET(t2), .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_t2, .extra2 = &max_t2 }, { |
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.procname = "t3", .data = (void *)DN_DEV_PARMS_OFFSET(t3), .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_t3, .extra2 = &max_t3 }, {0} }, |
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}; static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) { struct dn_dev_sysctl_table *t; int i; |
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char path[sizeof("net/decnet/conf/") + IFNAMSIZ]; |
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t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
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if (t == NULL) return; |
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for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { long offset = (long)t->dn_dev_vars[i].data; t->dn_dev_vars[i].data = ((char *)parms) + offset; |
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} |
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snprintf(path, sizeof(path), "net/decnet/conf/%s", dev? dev->name : parms->name); |
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t->dn_dev_vars[0].extra1 = (void *)dev; |
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t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars); |
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if (t->sysctl_header == NULL) kfree(t); else parms->sysctl = t; } static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) { if (parms->sysctl) { struct dn_dev_sysctl_table *t = parms->sysctl; parms->sysctl = NULL; |
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unregister_net_sysctl_table(t->sysctl_header); |
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kfree(t); } } |
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static int dn_forwarding_proc(struct ctl_table *table, int write, |
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void __user *buffer, size_t *lenp, loff_t *ppos) { #ifdef CONFIG_DECNET_ROUTER struct net_device *dev = table->extra1; struct dn_dev *dn_db; int err; int tmp, old; if (table->extra1 == NULL) return -EINVAL; |
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dn_db = rcu_dereference_raw(dev->dn_ptr); |
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old = dn_db->parms.forwarding; |
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err = proc_dointvec(table, write, buffer, lenp, ppos); |
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if ((err >= 0) && write) { if (dn_db->parms.forwarding < 0) dn_db->parms.forwarding = 0; if (dn_db->parms.forwarding > 2) dn_db->parms.forwarding = 2; /* * What an ugly hack this is... its works, just. It * would be nice if sysctl/proc were just that little * bit more flexible so I don't have to write a special * routine, or suffer hacks like this - SJW */ tmp = dn_db->parms.forwarding; dn_db->parms.forwarding = old; if (dn_db->parms.down) dn_db->parms.down(dev); dn_db->parms.forwarding = tmp; if (dn_db->parms.up) dn_db->parms.up(dev); } return err; #else return -EINVAL; #endif } |
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#else /* CONFIG_SYSCTL */ static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) { } static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) { } #endif /* CONFIG_SYSCTL */ static inline __u16 mtu2blksize(struct net_device *dev) { u32 blksize = dev->mtu; if (blksize > 0xffff) blksize = 0xffff; if (dev->type == ARPHRD_ETHER || dev->type == ARPHRD_PPP || dev->type == ARPHRD_IPGRE || dev->type == ARPHRD_LOOPBACK) blksize -= 2; return (__u16)blksize; } static struct dn_ifaddr *dn_dev_alloc_ifa(void) { struct dn_ifaddr *ifa; |
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ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
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return ifa; } |
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static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
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{ |
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kfree_rcu(ifa, rcu); |
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} static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) { struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); |
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unsigned char mac_addr[6]; struct net_device *dev = dn_db->dev; ASSERT_RTNL(); *ifap = ifa1->ifa_next; if (dn_db->dev->type == ARPHRD_ETHER) { |
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if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
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dn_dn2eth(mac_addr, ifa1->ifa_local); |
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dev_mc_del(dev, mac_addr); |
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} } |
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dn_ifaddr_notify(RTM_DELADDR, ifa1); |
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blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
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if (destroy) { dn_dev_free_ifa(ifa1); if (dn_db->ifa_list == NULL) dn_dev_delete(dn_db->dev); } } static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) { struct net_device *dev = dn_db->dev; struct dn_ifaddr *ifa1; unsigned char mac_addr[6]; ASSERT_RTNL(); |
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/* Check for duplicates */ |
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for (ifa1 = rtnl_dereference(dn_db->ifa_list); ifa1 != NULL; ifa1 = rtnl_dereference(ifa1->ifa_next)) { |
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if (ifa1->ifa_local == ifa->ifa_local) return -EEXIST; } if (dev->type == ARPHRD_ETHER) { |
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if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
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dn_dn2eth(mac_addr, ifa->ifa_local); |
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dev_mc_add(dev, mac_addr); |
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} } ifa->ifa_next = dn_db->ifa_list; |
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rcu_assign_pointer(dn_db->ifa_list, ifa); |
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dn_ifaddr_notify(RTM_NEWADDR, ifa); |
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blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
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return 0; } static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) { |
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struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
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int rv; if (dn_db == NULL) { int err; dn_db = dn_dev_create(dev, &err); if (dn_db == NULL) return err; } ifa->ifa_dev = dn_db; if (dev->flags & IFF_LOOPBACK) ifa->ifa_scope = RT_SCOPE_HOST; rv = dn_dev_insert_ifa(dn_db, ifa); if (rv) dn_dev_free_ifa(ifa); return rv; } int dn_dev_ioctl(unsigned int cmd, void __user *arg) { char buffer[DN_IFREQ_SIZE]; struct ifreq *ifr = (struct ifreq *)buffer; struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; struct dn_dev *dn_db; struct net_device *dev; |
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struct dn_ifaddr *ifa = NULL; struct dn_ifaddr __rcu **ifap = NULL; |
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int ret = 0; if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) return -EFAULT; ifr->ifr_name[IFNAMSIZ-1] = 0; |
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dev_load(&init_net, ifr->ifr_name); |
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switch (cmd) { case SIOCGIFADDR: break; case SIOCSIFADDR: if (!capable(CAP_NET_ADMIN)) return -EACCES; if (sdn->sdn_family != AF_DECnet) |
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return -EINVAL; |
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break; default: return -EINVAL; |
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} rtnl_lock(); |
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if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
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ret = -ENODEV; goto done; } |
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if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { for (ifap = &dn_db->ifa_list; (ifa = rtnl_dereference(*ifap)) != NULL; ifap = &ifa->ifa_next) |
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if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) break; } if (ifa == NULL && cmd != SIOCSIFADDR) { ret = -EADDRNOTAVAIL; goto done; } |
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switch (cmd) { case SIOCGIFADDR: *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; goto rarok; case SIOCSIFADDR: if (!ifa) { if ((ifa = dn_dev_alloc_ifa()) == NULL) { ret = -ENOBUFS; break; |
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} |
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memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); } else { if (ifa->ifa_local == dn_saddr2dn(sdn)) break; dn_dev_del_ifa(dn_db, ifap, 0); } |
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ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
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ret = dn_dev_set_ifa(dev, ifa); |
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} done: rtnl_unlock(); return ret; rarok: if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) ret = -EFAULT; goto done; } struct net_device *dn_dev_get_default(void) { struct net_device *dev; |
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spin_lock(&dndev_lock); |
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dev = decnet_default_device; if (dev) { if (dev->dn_ptr) dev_hold(dev); else dev = NULL; } |
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spin_unlock(&dndev_lock); |
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return dev; } int dn_dev_set_default(struct net_device *dev, int force) { struct net_device *old = NULL; int rv = -EBUSY; if (!dev->dn_ptr) return -ENODEV; |
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spin_lock(&dndev_lock); |
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if (force || decnet_default_device == NULL) { old = decnet_default_device; decnet_default_device = dev; rv = 0; } |
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spin_unlock(&dndev_lock); |
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if (old) |
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dev_put(old); |
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return rv; } static void dn_dev_check_default(struct net_device *dev) { |
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spin_lock(&dndev_lock); |
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if (dev == decnet_default_device) { decnet_default_device = NULL; } else { dev = NULL; } |
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spin_unlock(&dndev_lock); |
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if (dev) dev_put(dev); } |
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/* * Called with RTNL */ |
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static struct dn_dev *dn_dev_by_index(int ifindex) { struct net_device *dev; struct dn_dev *dn_dev = NULL; |
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dev = __dev_get_by_index(&init_net, ifindex); if (dev) |
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dn_dev = rtnl_dereference(dev->dn_ptr); |
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return dn_dev; } |
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static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
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[IFA_ADDRESS] = { .type = NLA_U16 }, [IFA_LOCAL] = { .type = NLA_U16 }, [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
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[IFA_FLAGS] = { .type = NLA_U32 }, |
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}; |
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static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
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{ |
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struct net *net = sock_net(skb->sk); |
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struct nlattr *tb[IFA_MAX+1]; |
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struct dn_dev *dn_db; |
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struct ifaddrmsg *ifm; |
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struct dn_ifaddr *ifa; struct dn_ifaddr __rcu **ifap; |
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int err = -EINVAL; |
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if (!netlink_capable(skb, CAP_NET_ADMIN)) |
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return -EPERM; |
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if (!net_eq(net, &init_net)) |
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goto errout; |
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err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); if (err < 0) goto errout; |
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err = -ENODEV; |
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ifm = nlmsg_data(nlh); |
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563 |
if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
4a89c2562
|
564 |
goto errout; |
3ccd86241
|
565 |
err = -EADDRNOTAVAIL; |
fc766e4c4
|
566 567 568 |
for (ifap = &dn_db->ifa_list; (ifa = rtnl_dereference(*ifap)) != NULL; ifap = &ifa->ifa_next) { |
4a89c2562
|
569 570 571 |
if (tb[IFA_LOCAL] && nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) continue; |
1da177e4c
|
572 |
|
4a89c2562
|
573 |
if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
1da177e4c
|
574 575 576 577 578 |
continue; dn_dev_del_ifa(dn_db, ifap, 1); return 0; } |
4a89c2562
|
579 580 |
errout: return err; |
1da177e4c
|
581 |
} |
661d2967b
|
582 |
static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4c
|
583 |
{ |
3b1e0a655
|
584 |
struct net *net = sock_net(skb->sk); |
4a89c2562
|
585 |
struct nlattr *tb[IFA_MAX+1]; |
1da177e4c
|
586 587 |
struct net_device *dev; struct dn_dev *dn_db; |
4a89c2562
|
588 |
struct ifaddrmsg *ifm; |
1da177e4c
|
589 |
struct dn_ifaddr *ifa; |
4a89c2562
|
590 |
int err; |
90f62cf30
|
591 |
if (!netlink_capable(skb, CAP_NET_ADMIN)) |
dfc47ef86
|
592 |
return -EPERM; |
09ad9bc75
|
593 |
if (!net_eq(net, &init_net)) |
b854272b3
|
594 |
return -EINVAL; |
4a89c2562
|
595 596 597 |
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); if (err < 0) return err; |
1da177e4c
|
598 |
|
4a89c2562
|
599 |
if (tb[IFA_LOCAL] == NULL) |
1da177e4c
|
600 |
return -EINVAL; |
4a89c2562
|
601 |
ifm = nlmsg_data(nlh); |
881d966b4
|
602 |
if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
1da177e4c
|
603 |
return -ENODEV; |
fc766e4c4
|
604 |
if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
1da177e4c
|
605 606 607 608 |
dn_db = dn_dev_create(dev, &err); if (!dn_db) return err; } |
429eb0fae
|
609 |
|
1da177e4c
|
610 611 |
if ((ifa = dn_dev_alloc_ifa()) == NULL) return -ENOBUFS; |
4a89c2562
|
612 613 614 615 616 |
if (tb[IFA_ADDRESS] == NULL) tb[IFA_ADDRESS] = tb[IFA_LOCAL]; ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); |
9a32b8604
|
617 618 |
ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
1da177e4c
|
619 620 |
ifa->ifa_scope = ifm->ifa_scope; ifa->ifa_dev = dn_db; |
4a89c2562
|
621 622 623 |
if (tb[IFA_LABEL]) nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
1da177e4c
|
624 625 |
else memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
4a89c2562
|
626 627 |
err = dn_dev_insert_ifa(dn_db, ifa); if (err) |
1da177e4c
|
628 |
dn_dev_free_ifa(ifa); |
4a89c2562
|
629 630 |
return err; |
1da177e4c
|
631 |
} |
a6f01cace
|
632 633 634 635 636 |
static inline size_t dn_ifaddr_nlmsg_size(void) { return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ + nla_total_size(2) /* IFA_ADDRESS */ |
9a32b8604
|
637 638 |
+ nla_total_size(2) /* IFA_LOCAL */ + nla_total_size(4); /* IFA_FLAGS */ |
a6f01cace
|
639 |
} |
4a89c2562
|
640 |
static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
15e473046
|
641 |
u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4c
|
642 643 644 |
{ struct ifaddrmsg *ifm; struct nlmsghdr *nlh; |
9a32b8604
|
645 |
u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
1da177e4c
|
646 |
|
15e473046
|
647 |
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
4a89c2562
|
648 |
if (nlh == NULL) |
26932566a
|
649 |
return -EMSGSIZE; |
1da177e4c
|
650 |
|
4a89c2562
|
651 |
ifm = nlmsg_data(nlh); |
1da177e4c
|
652 653 |
ifm->ifa_family = AF_DECnet; ifm->ifa_prefixlen = 16; |
9a32b8604
|
654 |
ifm->ifa_flags = ifa_flags; |
1da177e4c
|
655 656 |
ifm->ifa_scope = ifa->ifa_scope; ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
4a89c2562
|
657 |
|
b21dddb9d
|
658 659 660 661 662 |
if ((ifa->ifa_address && nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) || (ifa->ifa_local && nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) || (ifa->ifa_label[0] && |
9a32b8604
|
663 664 |
nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || nla_put_u32(skb, IFA_FLAGS, ifa_flags)) |
b21dddb9d
|
665 |
goto nla_put_failure; |
053c095a8
|
666 667 |
nlmsg_end(skb, nlh); return 0; |
4a89c2562
|
668 669 |
nla_put_failure: |
26932566a
|
670 671 |
nlmsg_cancel(skb, nlh); return -EMSGSIZE; |
1da177e4c
|
672 |
} |
b020b942c
|
673 |
static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
1da177e4c
|
674 675 |
{ struct sk_buff *skb; |
dc738dd83
|
676 |
int err = -ENOBUFS; |
1da177e4c
|
677 |
|
a6f01cace
|
678 |
skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
dc738dd83
|
679 680 |
if (skb == NULL) goto errout; |
4a89c2562
|
681 |
err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
26932566a
|
682 683 684 685 686 687 |
if (err < 0) { /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } |
1ce85fe40
|
688 689 |
rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); return; |
dc738dd83
|
690 691 |
errout: if (err < 0) |
97c53cacf
|
692 |
rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
1da177e4c
|
693 |
} |
4a89c2562
|
694 |
static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4c
|
695 |
{ |
3b1e0a655
|
696 |
struct net *net = sock_net(skb->sk); |
4a89c2562
|
697 |
int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
1da177e4c
|
698 699 700 |
struct net_device *dev; struct dn_dev *dn_db; struct dn_ifaddr *ifa; |
09ad9bc75
|
701 |
if (!net_eq(net, &init_net)) |
b854272b3
|
702 |
return 0; |
4a89c2562
|
703 704 |
skip_ndevs = cb->args[0]; skip_naddr = cb->args[1]; |
7562f876c
|
705 |
idx = 0; |
e67f88dd1
|
706 707 |
rcu_read_lock(); for_each_netdev_rcu(&init_net, dev) { |
4a89c2562
|
708 |
if (idx < skip_ndevs) |
7562f876c
|
709 |
goto cont; |
4a89c2562
|
710 711 712 713 714 |
else if (idx > skip_ndevs) { /* Only skip over addresses for first dev dumped * in this iteration (idx == skip_ndevs) */ skip_naddr = 0; } |
e67f88dd1
|
715 |
if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
7562f876c
|
716 |
goto cont; |
1da177e4c
|
717 |
|
e67f88dd1
|
718 719 |
for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { |
4a89c2562
|
720 |
if (dn_idx < skip_naddr) |
a2221f308
|
721 |
continue; |
1da177e4c
|
722 |
|
15e473046
|
723 |
if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid, |
4a89c2562
|
724 725 |
cb->nlh->nlmsg_seq, RTM_NEWADDR, NLM_F_MULTI) < 0) |
1da177e4c
|
726 727 |
goto done; } |
7562f876c
|
728 729 |
cont: idx++; |
1da177e4c
|
730 731 |
} done: |
e67f88dd1
|
732 |
rcu_read_unlock(); |
1da177e4c
|
733 734 735 736 737 |
cb->args[0] = idx; cb->args[1] = dn_idx; return skb->len; } |
c4ea94ab3
|
738 |
static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
1da177e4c
|
739 |
{ |
fc766e4c4
|
740 |
struct dn_dev *dn_db; |
1da177e4c
|
741 742 |
struct dn_ifaddr *ifa; int rv = -ENODEV; |
41bdecf17
|
743 |
|
fc766e4c4
|
744 745 |
rcu_read_lock(); dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4c
|
746 747 |
if (dn_db == NULL) goto out; |
41bdecf17
|
748 |
|
fc766e4c4
|
749 |
ifa = rcu_dereference(dn_db->ifa_list); |
1da177e4c
|
750 751 752 753 754 |
if (ifa != NULL) { *addr = ifa->ifa_local; rv = 0; } out: |
fc766e4c4
|
755 |
rcu_read_unlock(); |
1da177e4c
|
756 757 |
return rv; } |
429eb0fae
|
758 |
/* |
1da177e4c
|
759 760 761 762 763 764 765 766 767 |
* Find a default address to bind to. * * This is one of those areas where the initial VMS concepts don't really * map onto the Linux concepts, and since we introduced multiple addresses * per interface we have to cope with slightly odd ways of finding out what * "our address" really is. Mostly it's not a problem; for this we just guess * a sensible default. Eventually the routing code will take care of all the * nasties for us I hope. */ |
c4ea94ab3
|
768 |
int dn_dev_bind_default(__le16 *addr) |
1da177e4c
|
769 770 771 772 773 774 |
{ struct net_device *dev; int rv; dev = dn_dev_get_default(); last_chance: if (dev) { |
1da177e4c
|
775 |
rv = dn_dev_get_first(dev, addr); |
1da177e4c
|
776 |
dev_put(dev); |
2774c7aba
|
777 |
if (rv == 0 || dev == init_net.loopback_dev) |
1da177e4c
|
778 779 |
return rv; } |
2774c7aba
|
780 |
dev = init_net.loopback_dev; |
1da177e4c
|
781 782 783 784 785 786 |
dev_hold(dev); goto last_chance; } static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) { |
429eb0fae
|
787 788 789 |
struct endnode_hello_message *msg; struct sk_buff *skb = NULL; __le16 *pktlen; |
fc766e4c4
|
790 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
791 |
|
429eb0fae
|
792 |
if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
1da177e4c
|
793 |
return; |
429eb0fae
|
794 |
skb->dev = dev; |
1da177e4c
|
795 |
|
429eb0fae
|
796 |
msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
1da177e4c
|
797 |
|
429eb0fae
|
798 799 |
msg->msgflg = 0x0D; memcpy(msg->tiver, dn_eco_version, 3); |
1da177e4c
|
800 |
dn_dn2eth(msg->id, ifa->ifa_local); |
429eb0fae
|
801 |
msg->iinfo = DN_RT_INFO_ENDN; |
c4106aa88
|
802 |
msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
429eb0fae
|
803 804 805 |
msg->area = 0x00; memset(msg->seed, 0, 8); memcpy(msg->neighbor, dn_hiord, ETH_ALEN); |
1da177e4c
|
806 807 808 809 810 |
if (dn_db->router) { struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; dn_dn2eth(msg->neighbor, dn->addr); } |
c4106aa88
|
811 |
msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
429eb0fae
|
812 813 814 815 816 |
msg->mpd = 0x00; msg->datalen = 0x02; memset(msg->data, 0xAA, 2); pktlen = (__le16 *)skb_push(skb,2); |
c4106aa88
|
817 |
*pktlen = cpu_to_le16(skb->len - 2); |
1da177e4c
|
818 |
|
c1d2bbe1c
|
819 |
skb_reset_network_header(skb); |
1da177e4c
|
820 821 822 823 824 825 826 827 828 829 |
dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); } #define DRDELAY (5 * HZ) static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) { /* First check time since device went up */ |
b5c5c36d3
|
830 |
if (time_before(jiffies, dn_db->uptime + DRDELAY)) |
1da177e4c
|
831 832 833 834 835 836 837 838 839 840 841 842 843 |
return 0; /* If there is no router, then yes... */ if (!dn_db->router) return 1; /* otherwise only if we have a higher priority or.. */ if (dn->priority < dn_db->parms.priority) return 1; /* if we have equal priority and a higher node number */ if (dn->priority != dn_db->parms.priority) return 0; |
c4106aa88
|
844 |
if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
1da177e4c
|
845 846 847 848 849 850 851 852 |
return 1; return 0; } static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) { int n; |
fc766e4c4
|
853 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
854 855 856 857 858 |
struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; struct sk_buff *skb; size_t size; unsigned char *ptr; unsigned char *i1, *i2; |
c4ea94ab3
|
859 |
__le16 *pktlen; |
1da177e4c
|
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 |
char *src; if (mtu2blksize(dev) < (26 + 7)) return; n = mtu2blksize(dev) - 26; n /= 7; if (n > 32) n = 32; size = 2 + 26 + 7 * n; if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) return; skb->dev = dev; ptr = skb_put(skb, size); *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; *ptr++ = 2; /* ECO */ *ptr++ = 0; *ptr++ = 0; dn_dn2eth(ptr, ifa->ifa_local); src = ptr; ptr += ETH_ALEN; |
429eb0fae
|
886 |
*ptr++ = dn_db->parms.forwarding == 1 ? |
1da177e4c
|
887 |
DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
c4106aa88
|
888 |
*((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
1da177e4c
|
889 |
ptr += 2; |
429eb0fae
|
890 |
*ptr++ = dn_db->parms.priority; /* Priority */ |
1da177e4c
|
891 |
*ptr++ = 0; /* Area: Reserved */ |
c4106aa88
|
892 |
*((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
1da177e4c
|
893 894 895 896 897 898 899 900 901 902 903 904 905 |
ptr += 2; *ptr++ = 0; /* MPD: Reserved */ i1 = ptr++; memset(ptr, 0, 7); /* Name: Reserved */ ptr += 7; i2 = ptr++; n = dn_neigh_elist(dev, ptr, n); *i2 = 7 * n; *i1 = 8 + *i2; skb_trim(skb, (27 + *i2)); |
c4ea94ab3
|
906 |
pktlen = (__le16 *)skb_push(skb, 2); |
c4106aa88
|
907 |
*pktlen = cpu_to_le16(skb->len - 2); |
1da177e4c
|
908 |
|
c1d2bbe1c
|
909 |
skb_reset_network_header(skb); |
1da177e4c
|
910 911 912 913 914 915 916 917 918 919 920 921 922 |
if (dn_am_i_a_router(dn, dn_db, ifa)) { struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); if (skb2) { dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); } } dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); } static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) { |
fc766e4c4
|
923 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 |
if (dn_db->parms.forwarding == 0) dn_send_endnode_hello(dev, ifa); else dn_send_router_hello(dev, ifa); } static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) { int tdlen = 16; int size = dev->hard_header_len + 2 + 4 + tdlen; struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); int i; unsigned char *ptr; char src[ETH_ALEN]; if (skb == NULL) return ; skb->dev = dev; skb_push(skb, dev->hard_header_len); ptr = skb_put(skb, 2 + 4 + tdlen); *ptr++ = DN_RT_PKT_HELO; |
c4ea94ab3
|
948 |
*((__le16 *)ptr) = ifa->ifa_local; |
1da177e4c
|
949 950 951 952 953 954 955 956 957 958 959 960 |
ptr += 2; *ptr++ = tdlen; for(i = 0; i < tdlen; i++) *ptr++ = 0252; dn_dn2eth(src, ifa->ifa_local); dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); } static int dn_eth_up(struct net_device *dev) { |
fc766e4c4
|
961 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
962 963 |
if (dn_db->parms.forwarding == 0) |
22bedad3c
|
964 |
dev_mc_add(dev, dn_rt_all_end_mcast); |
1da177e4c
|
965 |
else |
22bedad3c
|
966 |
dev_mc_add(dev, dn_rt_all_rt_mcast); |
1da177e4c
|
967 |
|
1da177e4c
|
968 969 970 971 972 973 974 |
dn_db->use_long = 1; return 0; } static void dn_eth_down(struct net_device *dev) { |
fc766e4c4
|
975 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
976 977 |
if (dn_db->parms.forwarding == 0) |
22bedad3c
|
978 |
dev_mc_del(dev, dn_rt_all_end_mcast); |
1da177e4c
|
979 |
else |
22bedad3c
|
980 |
dev_mc_del(dev, dn_rt_all_rt_mcast); |
1da177e4c
|
981 982 983 984 985 986 987 |
} static void dn_dev_set_timer(struct net_device *dev); static void dn_dev_timer_func(unsigned long arg) { struct net_device *dev = (struct net_device *)arg; |
fc766e4c4
|
988 |
struct dn_dev *dn_db; |
1da177e4c
|
989 |
struct dn_ifaddr *ifa; |
fc766e4c4
|
990 991 |
rcu_read_lock(); dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4c
|
992 993 |
if (dn_db->t3 <= dn_db->parms.t2) { if (dn_db->parms.timer3) { |
fc766e4c4
|
994 995 996 |
for (ifa = rcu_dereference(dn_db->ifa_list); ifa; ifa = rcu_dereference(ifa->ifa_next)) { |
1da177e4c
|
997 998 999 1000 1001 1002 1003 1004 |
if (!(ifa->ifa_flags & IFA_F_SECONDARY)) dn_db->parms.timer3(dev, ifa); } } dn_db->t3 = dn_db->parms.t3; } else { dn_db->t3 -= dn_db->parms.t2; } |
fc766e4c4
|
1005 |
rcu_read_unlock(); |
1da177e4c
|
1006 1007 1008 1009 1010 |
dn_dev_set_timer(dev); } static void dn_dev_set_timer(struct net_device *dev) { |
fc766e4c4
|
1011 |
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4c
|
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 |
if (dn_db->parms.t2 > dn_db->parms.t3) dn_db->parms.t2 = dn_db->parms.t3; dn_db->timer.data = (unsigned long)dev; dn_db->timer.function = dn_dev_timer_func; dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); add_timer(&dn_db->timer); } |
5eaa65b24
|
1022 |
static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
1da177e4c
|
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 |
{ int i; struct dn_dev_parms *p = dn_dev_list; struct dn_dev *dn_db; for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { if (p->type == dev->type) break; } *err = -ENODEV; if (i == DN_DEV_LIST_SIZE) return NULL; *err = -ENOBUFS; |
0da974f4f
|
1038 |
if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
1da177e4c
|
1039 |
return NULL; |
1da177e4c
|
1040 |
memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
fc766e4c4
|
1041 |
|
cf778b00e
|
1042 |
rcu_assign_pointer(dev->dn_ptr, dn_db); |
1da177e4c
|
1043 1044 1045 1046 |
dn_db->dev = dev; init_timer(&dn_db->timer); dn_db->uptime = jiffies; |
95743deb3
|
1047 1048 1049 |
dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); if (!dn_db->neigh_parms) { |
a9b3cd7f3
|
1050 |
RCU_INIT_POINTER(dev->dn_ptr, NULL); |
95743deb3
|
1051 1052 1053 |
kfree(dn_db); return NULL; } |
1da177e4c
|
1054 1055 |
if (dn_db->parms.up) { if (dn_db->parms.up(dev) < 0) { |
95743deb3
|
1056 |
neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
1da177e4c
|
1057 1058 1059 1060 1061 |
dev->dn_ptr = NULL; kfree(dn_db); return NULL; } } |
1da177e4c
|
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 |
dn_dev_sysctl_register(dev, &dn_db->parms); dn_dev_set_timer(dev); *err = 0; return dn_db; } /* * This processes a device up event. We only start up * the loopback device & ethernet devices with correct |
b595076a1
|
1074 |
* MAC addresses automatically. Others must be started |
1da177e4c
|
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 |
* specifically. * * FIXME: How should we configure the loopback address ? If we could dispense * with using decnet_address here and for autobind, it will be one less thing * for users to worry about setting up. */ void dn_dev_up(struct net_device *dev) { struct dn_ifaddr *ifa; |
c4ea94ab3
|
1085 |
__le16 addr = decnet_address; |
1da177e4c
|
1086 |
int maybe_default = 0; |
fc766e4c4
|
1087 |
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4c
|
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 |
if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) return; /* * Need to ensure that loopback device has a dn_db attached to it * to allow creation of neighbours against it, even though it might * not have a local address of its own. Might as well do the same for * all autoconfigured interfaces. */ if (dn_db == NULL) { int err; dn_db = dn_dev_create(dev, &err); if (dn_db == NULL) return; } if (dev->type == ARPHRD_ETHER) { if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) return; |
c4ea94ab3
|
1108 |
addr = dn_eth2dn(dev->dev_addr); |
1da177e4c
|
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 |
maybe_default = 1; } if (addr == 0) return; if ((ifa = dn_dev_alloc_ifa()) == NULL) return; ifa->ifa_local = ifa->ifa_address = addr; ifa->ifa_flags = 0; ifa->ifa_scope = RT_SCOPE_UNIVERSE; strcpy(ifa->ifa_label, dev->name); dn_dev_set_ifa(dev, ifa); /* * Automagically set the default device to the first automatically * configured ethernet card in the system. */ if (maybe_default) { dev_hold(dev); if (dn_dev_set_default(dev, 0)) dev_put(dev); } } static void dn_dev_delete(struct net_device *dev) { |
fc766e4c4
|
1138 |
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4c
|
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 |
if (dn_db == NULL) return; del_timer_sync(&dn_db->timer); dn_dev_sysctl_unregister(&dn_db->parms); dn_dev_check_default(dev); neigh_ifdown(&dn_neigh_table, dev); if (dn_db->parms.down) dn_db->parms.down(dev); dev->dn_ptr = NULL; neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); neigh_ifdown(&dn_neigh_table, dev); if (dn_db->router) neigh_release(dn_db->router); if (dn_db->peer) neigh_release(dn_db->peer); kfree(dn_db); } void dn_dev_down(struct net_device *dev) { |
fc766e4c4
|
1166 |
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
1da177e4c
|
1167 1168 1169 1170 |
struct dn_ifaddr *ifa; if (dn_db == NULL) return; |
fc766e4c4
|
1171 |
while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
1da177e4c
|
1172 1173 1174 1175 1176 1177 1178 1179 1180 |
dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); dn_dev_free_ifa(ifa); } dn_dev_delete(dev); } void dn_dev_init_pkt(struct sk_buff *skb) { |
1da177e4c
|
1181 1182 1183 1184 |
} void dn_dev_veri_pkt(struct sk_buff *skb) { |
1da177e4c
|
1185 1186 1187 1188 |
} void dn_dev_hello(struct sk_buff *skb) { |
1da177e4c
|
1189 1190 1191 1192 1193 1194 1195 |
} void dn_dev_devices_off(void) { struct net_device *dev; rtnl_lock(); |
881d966b4
|
1196 |
for_each_netdev(&init_net, dev) |
1da177e4c
|
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 |
dn_dev_down(dev); rtnl_unlock(); } void dn_dev_devices_on(void) { struct net_device *dev; rtnl_lock(); |
881d966b4
|
1207 |
for_each_netdev(&init_net, dev) { |
1da177e4c
|
1208 1209 1210 1211 1212 1213 1214 1215 |
if (dev->flags & IFF_UP) dn_dev_up(dev); } rtnl_unlock(); } int register_dnaddr_notifier(struct notifier_block *nb) { |
e041c6834
|
1216 |
return blocking_notifier_chain_register(&dnaddr_chain, nb); |
1da177e4c
|
1217 1218 1219 1220 |
} int unregister_dnaddr_notifier(struct notifier_block *nb) { |
e041c6834
|
1221 |
return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
1da177e4c
|
1222 1223 1224 |
} #ifdef CONFIG_PROC_FS |
7562f876c
|
1225 |
static inline int is_dn_dev(struct net_device *dev) |
1da177e4c
|
1226 |
{ |
7562f876c
|
1227 |
return dev->dn_ptr != NULL; |
1da177e4c
|
1228 |
} |
7562f876c
|
1229 |
static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
fc766e4c4
|
1230 |
__acquires(RCU) |
1da177e4c
|
1231 |
{ |
7562f876c
|
1232 |
int i; |
1da177e4c
|
1233 |
struct net_device *dev; |
fa918602b
|
1234 |
rcu_read_lock(); |
1da177e4c
|
1235 |
|
7562f876c
|
1236 1237 1238 1239 |
if (*pos == 0) return SEQ_START_TOKEN; i = 1; |
fa918602b
|
1240 |
for_each_netdev_rcu(&init_net, dev) { |
7562f876c
|
1241 1242 1243 1244 1245 |
if (!is_dn_dev(dev)) continue; if (i++ == *pos) return dev; |
1da177e4c
|
1246 |
} |
7562f876c
|
1247 1248 |
return NULL; |
1da177e4c
|
1249 1250 1251 1252 |
} static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) { |
7562f876c
|
1253 |
struct net_device *dev; |
1da177e4c
|
1254 |
|
1da177e4c
|
1255 |
++*pos; |
7562f876c
|
1256 |
|
ea1107338
|
1257 |
dev = v; |
7562f876c
|
1258 |
if (v == SEQ_START_TOKEN) |
881d966b4
|
1259 |
dev = net_device_entry(&init_net.dev_base_head); |
7562f876c
|
1260 |
|
fa918602b
|
1261 |
for_each_netdev_continue_rcu(&init_net, dev) { |
7562f876c
|
1262 1263 1264 1265 1266 1267 1268 |
if (!is_dn_dev(dev)) continue; return dev; } return NULL; |
1da177e4c
|
1269 1270 1271 |
} static void dn_dev_seq_stop(struct seq_file *seq, void *v) |
fc766e4c4
|
1272 |
__releases(RCU) |
1da177e4c
|
1273 |
{ |
fa918602b
|
1274 |
rcu_read_unlock(); |
1da177e4c
|
1275 1276 1277 1278 |
} static char *dn_type2asc(char type) { |
06f8fe11b
|
1279 1280 1281 1282 1283 1284 1285 |
switch (type) { case DN_DEV_BCAST: return "B"; case DN_DEV_UCAST: return "U"; case DN_DEV_MPOINT: return "M"; |
1da177e4c
|
1286 1287 1288 1289 1290 1291 1292 1293 |
} return "?"; } static int dn_dev_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) |
429eb0fae
|
1294 1295 |
seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer "); |
1da177e4c
|
1296 1297 1298 1299 |
else { struct net_device *dev = v; char peer_buf[DN_ASCBUF_LEN]; char router_buf[DN_ASCBUF_LEN]; |
fc766e4c4
|
1300 |
struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
1da177e4c
|
1301 |
|
429eb0fae
|
1302 |
seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
1da177e4c
|
1303 1304 |
" %04hu %03d %02x %-10s %-7s %-7s ", |
429eb0fae
|
1305 1306 1307 |
dev->name ? dev->name : "???", dn_type2asc(dn_db->parms.mode), 0, 0, |
1da177e4c
|
1308 1309 1310 1311 |
dn_db->t3, dn_db->parms.t3, mtu2blksize(dev), dn_db->parms.priority, dn_db->parms.state, dn_db->parms.name, |
c4106aa88
|
1312 1313 |
dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); |
1da177e4c
|
1314 1315 1316 |
} return 0; } |
56b3d975b
|
1317 |
static const struct seq_operations dn_dev_seq_ops = { |
1da177e4c
|
1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 |
.start = dn_dev_seq_start, .next = dn_dev_seq_next, .stop = dn_dev_seq_stop, .show = dn_dev_seq_show, }; static int dn_dev_seq_open(struct inode *inode, struct file *file) { return seq_open(file, &dn_dev_seq_ops); } |
9a32144e9
|
1328 |
static const struct file_operations dn_dev_seq_fops = { |
1da177e4c
|
1329 1330 1331 1332 1333 1334 1335 1336 |
.owner = THIS_MODULE, .open = dn_dev_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; #endif /* CONFIG_PROC_FS */ |
4e058063f
|
1337 |
static int addr[2]; |
1da177e4c
|
1338 1339 1340 1341 1342 |
module_param_array(addr, int, NULL, 0444); MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); void __init dn_dev_init(void) { |
429eb0fae
|
1343 1344 1345 1346 |
if (addr[0] > 63 || addr[0] < 0) { printk(KERN_ERR "DECnet: Area must be between 0 and 63"); return; } |
1da177e4c
|
1347 |
|
429eb0fae
|
1348 1349 1350 1351 |
if (addr[1] > 1023 || addr[1] < 0) { printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); return; } |
1da177e4c
|
1352 |
|
c4106aa88
|
1353 |
decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
1da177e4c
|
1354 1355 |
dn_dev_devices_on(); |
c7ac8679b
|
1356 1357 1358 |
rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); |
1da177e4c
|
1359 |
|
d4beaa66a
|
1360 |
proc_create("decnet_dev", S_IRUGO, init_net.proc_net, &dn_dev_seq_fops); |
1da177e4c
|
1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 |
#ifdef CONFIG_SYSCTL { int i; for(i = 0; i < DN_DEV_LIST_SIZE; i++) dn_dev_sysctl_register(NULL, &dn_dev_list[i]); } #endif /* CONFIG_SYSCTL */ } void __exit dn_dev_cleanup(void) { |
1da177e4c
|
1373 1374 1375 1376 1377 1378 1379 |
#ifdef CONFIG_SYSCTL { int i; for(i = 0; i < DN_DEV_LIST_SIZE; i++) dn_dev_sysctl_unregister(&dn_dev_list[i]); } #endif /* CONFIG_SYSCTL */ |
ece31ffd5
|
1380 |
remove_proc_entry("decnet_dev", init_net.proc_net); |
1da177e4c
|
1381 1382 1383 |
dn_dev_devices_off(); } |