summaryrefslogtreecommitdiff
path: root/net/decnet/dn_dev.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/decnet/dn_dev.c')
-rw-r--r--net/decnet/dn_dev.c1433
1 files changed, 0 insertions, 1433 deletions
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
deleted file mode 100644
index a09ba642b5e7..000000000000
--- a/net/decnet/dn_dev.c
+++ /dev/null
@@ -1,1433 +0,0 @@
-// 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 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.
- */
-
-#include <linux/capability.h>
-#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>
-#include <linux/if_addr.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/skbuff.h>
-#include <linux/sysctl.h>
-#include <linux/notifier.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/uaccess.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/netlink.h>
-#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 (offsetof(struct ifreq, ifr_ifru) + 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.
- */
-__le16 decnet_address = 0;
-
-static DEFINE_SPINLOCK(dndev_lock);
-static struct net_device *decnet_default_device;
-static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
-
-static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
-static void dn_dev_delete(struct net_device *dev);
-static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
-
-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",
- .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",
- .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",
- .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",
- .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",
- .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",
- .timer3 = dn_send_brd_hello,
-}
-};
-
-#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
-
-#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
-
-#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 */
-
-static int dn_forwarding_proc(struct ctl_table *, int, void *, size_t *,
- loff_t *);
-static struct dn_dev_sysctl_table {
- struct ctl_table_header *sysctl_header;
- struct ctl_table dn_dev_vars[5];
-} dn_dev_sysctl = {
- NULL,
- {
- {
- .procname = "forwarding",
- .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = dn_forwarding_proc,
- },
- {
- .procname = "priority",
- .data = (void *)DN_DEV_PARMS_OFFSET(priority),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_priority,
- .extra2 = &max_priority
- },
- {
- .procname = "t2",
- .data = (void *)DN_DEV_PARMS_OFFSET(t2),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t2,
- .extra2 = &max_t2
- },
- {
- .procname = "t3",
- .data = (void *)DN_DEV_PARMS_OFFSET(t3),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t3,
- .extra2 = &max_t3
- },
- { }
- },
-};
-
-static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
-{
- struct dn_dev_sysctl_table *t;
- int i;
-
- char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
-
- t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
- if (t == NULL)
- return;
-
- 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;
- }
-
- snprintf(path, sizeof(path), "net/decnet/conf/%s",
- dev? dev->name : parms->name);
-
- t->dn_dev_vars[0].extra1 = (void *)dev;
-
- t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
- 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;
- unregister_net_sysctl_table(t->sysctl_header);
- kfree(t);
- }
-}
-
-static int dn_forwarding_proc(struct ctl_table *table, int write,
- void *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;
-
- dn_db = rcu_dereference_raw(dev->dn_ptr);
- old = dn_db->parms.forwarding;
-
- err = proc_dointvec(table, write, buffer, lenp, ppos);
-
- 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
-}
-
-#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;
-
- ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
-
- return ifa;
-}
-
-static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
-{
- kfree_rcu(ifa, rcu);
-}
-
-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);
- 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) {
- if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
- dn_dn2eth(mac_addr, ifa1->ifa_local);
- dev_mc_del(dev, mac_addr);
- }
- }
-
- dn_ifaddr_notify(RTM_DELADDR, ifa1);
- blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
- 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();
-
- /* Check for duplicates */
- for (ifa1 = rtnl_dereference(dn_db->ifa_list);
- ifa1 != NULL;
- ifa1 = rtnl_dereference(ifa1->ifa_next)) {
- if (ifa1->ifa_local == ifa->ifa_local)
- return -EEXIST;
- }
-
- if (dev->type == ARPHRD_ETHER) {
- if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
- dn_dn2eth(mac_addr, ifa->ifa_local);
- dev_mc_add(dev, mac_addr);
- }
- }
-
- ifa->ifa_next = dn_db->ifa_list;
- rcu_assign_pointer(dn_db->ifa_list, ifa);
-
- dn_ifaddr_notify(RTM_NEWADDR, ifa);
- blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
-
- return 0;
-}
-
-static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
- 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;
- struct dn_ifaddr *ifa = NULL;
- struct dn_ifaddr __rcu **ifap = NULL;
- int ret = 0;
-
- if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
- return -EFAULT;
- ifr->ifr_name[IFNAMSIZ-1] = 0;
-
- dev_load(&init_net, ifr->ifr_name);
-
- switch (cmd) {
- case SIOCGIFADDR:
- break;
- case SIOCSIFADDR:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
- if (sdn->sdn_family != AF_DECnet)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
-
- rtnl_lock();
-
- if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
- ret = -ENODEV;
- goto done;
- }
-
- if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
- for (ifap = &dn_db->ifa_list;
- (ifa = rtnl_dereference(*ifap)) != NULL;
- ifap = &ifa->ifa_next)
- if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
- break;
- }
-
- if (ifa == NULL && cmd != SIOCSIFADDR) {
- ret = -EADDRNOTAVAIL;
- goto done;
- }
-
- switch (cmd) {
- case SIOCGIFADDR:
- *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
- if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
- ret = -EFAULT;
- break;
-
- case SIOCSIFADDR:
- if (!ifa) {
- if ((ifa = dn_dev_alloc_ifa()) == NULL) {
- ret = -ENOBUFS;
- break;
- }
- memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
- } else {
- if (ifa->ifa_local == dn_saddr2dn(sdn))
- break;
- dn_dev_del_ifa(dn_db, ifap, 0);
- }
-
- ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
-
- ret = dn_dev_set_ifa(dev, ifa);
- }
-done:
- rtnl_unlock();
-
- return ret;
-}
-
-struct net_device *dn_dev_get_default(void)
-{
- struct net_device *dev;
-
- spin_lock(&dndev_lock);
- dev = decnet_default_device;
- if (dev) {
- if (dev->dn_ptr)
- dev_hold(dev);
- else
- dev = NULL;
- }
- spin_unlock(&dndev_lock);
-
- 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;
-
- spin_lock(&dndev_lock);
- if (force || decnet_default_device == NULL) {
- old = decnet_default_device;
- decnet_default_device = dev;
- rv = 0;
- }
- spin_unlock(&dndev_lock);
-
- dev_put(old);
- return rv;
-}
-
-static void dn_dev_check_default(struct net_device *dev)
-{
- spin_lock(&dndev_lock);
- if (dev == decnet_default_device) {
- decnet_default_device = NULL;
- } else {
- dev = NULL;
- }
- spin_unlock(&dndev_lock);
-
- dev_put(dev);
-}
-
-/*
- * Called with RTNL
- */
-static struct dn_dev *dn_dev_by_index(int ifindex)
-{
- struct net_device *dev;
- struct dn_dev *dn_dev = NULL;
-
- dev = __dev_get_by_index(&init_net, ifindex);
- if (dev)
- dn_dev = rtnl_dereference(dev->dn_ptr);
-
- return dn_dev;
-}
-
-static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
- [IFA_ADDRESS] = { .type = NLA_U16 },
- [IFA_LOCAL] = { .type = NLA_U16 },
- [IFA_LABEL] = { .type = NLA_STRING,
- .len = IFNAMSIZ - 1 },
- [IFA_FLAGS] = { .type = NLA_U32 },
-};
-
-static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct nlattr *tb[IFA_MAX+1];
- struct dn_dev *dn_db;
- struct ifaddrmsg *ifm;
- struct dn_ifaddr *ifa;
- struct dn_ifaddr __rcu **ifap;
- int err = -EINVAL;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- goto errout;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
- dn_ifa_policy, extack);
- if (err < 0)
- goto errout;
-
- err = -ENODEV;
- ifm = nlmsg_data(nlh);
- if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
- goto errout;
-
- err = -EADDRNOTAVAIL;
- for (ifap = &dn_db->ifa_list;
- (ifa = rtnl_dereference(*ifap)) != NULL;
- ifap = &ifa->ifa_next) {
- if (tb[IFA_LOCAL] &&
- nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
- continue;
-
- if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
- continue;
-
- dn_dev_del_ifa(dn_db, ifap, 1);
- return 0;
- }
-
-errout:
- return err;
-}
-
-static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct nlattr *tb[IFA_MAX+1];
- struct net_device *dev;
- struct dn_dev *dn_db;
- struct ifaddrmsg *ifm;
- struct dn_ifaddr *ifa;
- int err;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- return -EINVAL;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
- dn_ifa_policy, extack);
- if (err < 0)
- return err;
-
- if (tb[IFA_LOCAL] == NULL)
- return -EINVAL;
-
- ifm = nlmsg_data(nlh);
- if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
- return -ENODEV;
-
- if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
- dn_db = dn_dev_create(dev, &err);
- if (!dn_db)
- return err;
- }
-
- if ((ifa = dn_dev_alloc_ifa()) == NULL)
- return -ENOBUFS;
-
- 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]);
- ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
- ifm->ifa_flags;
- ifa->ifa_scope = ifm->ifa_scope;
- ifa->ifa_dev = dn_db;
-
- if (tb[IFA_LABEL])
- nla_strscpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
- else
- memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
-
- err = dn_dev_insert_ifa(dn_db, ifa);
- if (err)
- dn_dev_free_ifa(ifa);
-
- return err;
-}
-
-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 */
- + nla_total_size(2) /* IFA_LOCAL */
- + nla_total_size(4); /* IFA_FLAGS */
-}
-
-static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
- u32 portid, u32 seq, int event, unsigned int flags)
-{
- struct ifaddrmsg *ifm;
- struct nlmsghdr *nlh;
- u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
-
- nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
- if (nlh == NULL)
- return -EMSGSIZE;
-
- ifm = nlmsg_data(nlh);
- ifm->ifa_family = AF_DECnet;
- ifm->ifa_prefixlen = 16;
- ifm->ifa_flags = ifa_flags;
- ifm->ifa_scope = ifa->ifa_scope;
- ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
-
- 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] &&
- nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
- nla_put_u32(skb, IFA_FLAGS, ifa_flags))
- goto nla_put_failure;
- nlmsg_end(skb, nlh);
- return 0;
-
-nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
-}
-
-static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
-{
- struct sk_buff *skb;
- int err = -ENOBUFS;
-
- skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
- if (skb == NULL)
- goto errout;
-
- err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- goto errout;
- }
- rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
- return;
-errout:
- if (err < 0)
- rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
-}
-
-static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
-{
- struct net *net = sock_net(skb->sk);
- int idx, dn_idx = 0, skip_ndevs, skip_naddr;
- struct net_device *dev;
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
-
- if (!net_eq(net, &init_net))
- return 0;
-
- skip_ndevs = cb->args[0];
- skip_naddr = cb->args[1];
-
- idx = 0;
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if (idx < skip_ndevs)
- goto cont;
- else if (idx > skip_ndevs) {
- /* Only skip over addresses for first dev dumped
- * in this iteration (idx == skip_ndevs) */
- skip_naddr = 0;
- }
-
- if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
- goto cont;
-
- for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
- ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
- if (dn_idx < skip_naddr)
- continue;
-
- if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, RTM_NEWADDR,
- NLM_F_MULTI) < 0)
- goto done;
- }
-cont:
- idx++;
- }
-done:
- rcu_read_unlock();
- cb->args[0] = idx;
- cb->args[1] = dn_idx;
-
- return skb->len;
-}
-
-static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
-{
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
- int rv = -ENODEV;
-
- rcu_read_lock();
- dn_db = rcu_dereference(dev->dn_ptr);
- if (dn_db == NULL)
- goto out;
-
- ifa = rcu_dereference(dn_db->ifa_list);
- if (ifa != NULL) {
- *addr = ifa->ifa_local;
- rv = 0;
- }
-out:
- rcu_read_unlock();
- return rv;
-}
-
-/*
- * 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.
- */
-int dn_dev_bind_default(__le16 *addr)
-{
- struct net_device *dev;
- int rv;
- dev = dn_dev_get_default();
-last_chance:
- if (dev) {
- rv = dn_dev_get_first(dev, addr);
- dev_put(dev);
- if (rv == 0 || dev == init_net.loopback_dev)
- return rv;
- }
- dev = init_net.loopback_dev;
- dev_hold(dev);
- goto last_chance;
-}
-
-static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- struct endnode_hello_message *msg;
- struct sk_buff *skb = NULL;
- __le16 *pktlen;
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
- return;
-
- skb->dev = dev;
-
- msg = skb_put(skb, sizeof(*msg));
-
- msg->msgflg = 0x0D;
- memcpy(msg->tiver, dn_eco_version, 3);
- dn_dn2eth(msg->id, ifa->ifa_local);
- msg->iinfo = DN_RT_INFO_ENDN;
- msg->blksize = cpu_to_le16(mtu2blksize(dev));
- msg->area = 0x00;
- memset(msg->seed, 0, 8);
- memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
-
- if (dn_db->router) {
- struct dn_neigh *dn = container_of(dn_db->router, struct dn_neigh, n);
- dn_dn2eth(msg->neighbor, dn->addr);
- }
-
- msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
- msg->mpd = 0x00;
- msg->datalen = 0x02;
- memset(msg->data, 0xAA, 2);
-
- pktlen = skb_push(skb, 2);
- *pktlen = cpu_to_le16(skb->len - 2);
-
- skb_reset_network_header(skb);
-
- 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 */
- if (time_before(jiffies, dn_db->uptime + DRDELAY))
- 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;
-
- if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
- return 1;
-
- return 0;
-}
-
-static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- int n;
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
- struct dn_neigh *dn = container_of(dn_db->router, struct dn_neigh, n);
- struct sk_buff *skb;
- size_t size;
- unsigned char *ptr;
- unsigned char *i1, *i2;
- __le16 *pktlen;
- 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;
- *ptr++ = dn_db->parms.forwarding == 1 ?
- DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
- *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
- ptr += 2;
- *ptr++ = dn_db->parms.priority; /* Priority */
- *ptr++ = 0; /* Area: Reserved */
- *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
- 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));
-
- pktlen = skb_push(skb, 2);
- *pktlen = cpu_to_le16(skb->len - 2);
-
- skb_reset_network_header(skb);
-
- 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)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- 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;
- *((__le16 *)ptr) = ifa->ifa_local;
- 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)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.forwarding == 0)
- dev_mc_add(dev, dn_rt_all_end_mcast);
- else
- dev_mc_add(dev, dn_rt_all_rt_mcast);
-
- dn_db->use_long = 1;
-
- return 0;
-}
-
-static void dn_eth_down(struct net_device *dev)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.forwarding == 0)
- dev_mc_del(dev, dn_rt_all_end_mcast);
- else
- dev_mc_del(dev, dn_rt_all_rt_mcast);
-}
-
-static void dn_dev_set_timer(struct net_device *dev);
-
-static void dn_dev_timer_func(struct timer_list *t)
-{
- struct dn_dev *dn_db = from_timer(dn_db, t, timer);
- struct net_device *dev;
- struct dn_ifaddr *ifa;
-
- rcu_read_lock();
- dev = dn_db->dev;
- if (dn_db->t3 <= dn_db->parms.t2) {
- if (dn_db->parms.timer3) {
- for (ifa = rcu_dereference(dn_db->ifa_list);
- ifa;
- ifa = rcu_dereference(ifa->ifa_next)) {
- 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;
- }
- rcu_read_unlock();
- dn_dev_set_timer(dev);
-}
-
-static void dn_dev_set_timer(struct net_device *dev)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.t2 > dn_db->parms.t3)
- dn_db->parms.t2 = dn_db->parms.t3;
-
- dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
-
- add_timer(&dn_db->timer);
-}
-
-static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
-{
- 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;
- if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
- return NULL;
-
- memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
-
- rcu_assign_pointer(dev->dn_ptr, dn_db);
- dn_db->dev = dev;
- timer_setup(&dn_db->timer, dn_dev_timer_func, 0);
-
- dn_db->uptime = jiffies;
-
- dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
- if (!dn_db->neigh_parms) {
- RCU_INIT_POINTER(dev->dn_ptr, NULL);
- kfree(dn_db);
- return NULL;
- }
-
- if (dn_db->parms.up) {
- if (dn_db->parms.up(dev) < 0) {
- neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
- dev->dn_ptr = NULL;
- kfree(dn_db);
- return NULL;
- }
- }
-
- 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
- * MAC addresses automatically. Others must be started
- * 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;
- __le16 addr = decnet_address;
- int maybe_default = 0;
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
-
- 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;
- addr = dn_eth2dn(dev->dev_addr);
- 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)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
-
- 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)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
- struct dn_ifaddr *ifa;
-
- if (dn_db == NULL)
- return;
-
- while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
- 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)
-{
-}
-
-void dn_dev_veri_pkt(struct sk_buff *skb)
-{
-}
-
-void dn_dev_hello(struct sk_buff *skb)
-{
-}
-
-void dn_dev_devices_off(void)
-{
- struct net_device *dev;
-
- rtnl_lock();
- for_each_netdev(&init_net, dev)
- dn_dev_down(dev);
- rtnl_unlock();
-
-}
-
-void dn_dev_devices_on(void)
-{
- struct net_device *dev;
-
- rtnl_lock();
- for_each_netdev(&init_net, dev) {
- if (dev->flags & IFF_UP)
- dn_dev_up(dev);
- }
- rtnl_unlock();
-}
-
-int register_dnaddr_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_register(&dnaddr_chain, nb);
-}
-
-int unregister_dnaddr_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
-}
-
-#ifdef CONFIG_PROC_FS
-static inline int is_dn_dev(struct net_device *dev)
-{
- return dev->dn_ptr != NULL;
-}
-
-static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(RCU)
-{
- int i;
- struct net_device *dev;
-
- rcu_read_lock();
-
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- i = 1;
- for_each_netdev_rcu(&init_net, dev) {
- if (!is_dn_dev(dev))
- continue;
-
- if (i++ == *pos)
- return dev;
- }
-
- return NULL;
-}
-
-static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct net_device *dev;
-
- ++*pos;
-
- dev = v;
- if (v == SEQ_START_TOKEN)
- dev = net_device_entry(&init_net.dev_base_head);
-
- for_each_netdev_continue_rcu(&init_net, dev) {
- if (!is_dn_dev(dev))
- continue;
-
- return dev;
- }
-
- return NULL;
-}
-
-static void dn_dev_seq_stop(struct seq_file *seq, void *v)
- __releases(RCU)
-{
- rcu_read_unlock();
-}
-
-static char *dn_type2asc(char type)
-{
- switch (type) {
- case DN_DEV_BCAST:
- return "B";
- case DN_DEV_UCAST:
- return "U";
- case DN_DEV_MPOINT:
- return "M";
- }
-
- return "?";
-}
-
-static int dn_dev_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
- else {
- struct net_device *dev = v;
- char peer_buf[DN_ASCBUF_LEN];
- char router_buf[DN_ASCBUF_LEN];
- struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
-
- seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
- " %04hu %03d %02x %-10s %-7s %-7s\n",
- dev->name,
- dn_type2asc(dn_db->parms.mode),
- 0, 0,
- dn_db->t3, dn_db->parms.t3,
- mtu2blksize(dev),
- dn_db->parms.priority,
- dn_db->parms.state, dn_db->parms.name,
- 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) : "");
- }
- return 0;
-}
-
-static const struct seq_operations dn_dev_seq_ops = {
- .start = dn_dev_seq_start,
- .next = dn_dev_seq_next,
- .stop = dn_dev_seq_stop,
- .show = dn_dev_seq_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-static int addr[2];
-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)
-{
- if (addr[0] > 63 || addr[0] < 0) {
- printk(KERN_ERR "DECnet: Area must be between 0 and 63");
- return;
- }
-
- if (addr[1] > 1023 || addr[1] < 0) {
- printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
- return;
- }
-
- decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
-
- dn_dev_devices_on();
-
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWADDR,
- dn_nl_newaddr, NULL, 0);
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELADDR,
- dn_nl_deladdr, NULL, 0);
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETADDR,
- NULL, dn_nl_dump_ifaddr, 0);
-
- proc_create_seq("decnet_dev", 0444, init_net.proc_net, &dn_dev_seq_ops);
-
-#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)
-{
-#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 */
-
- remove_proc_entry("decnet_dev", init_net.proc_net);
-
- dn_dev_devices_off();
-}