linux/net/decnet/dn_dev.c
<<
>>
Prefs
   1/*
   2 * DECnet       An implementation of the DECnet protocol suite for the LINUX
   3 *              operating system.  DECnet is implemented using the  BSD Socket
   4 *              interface as the means of communication with the user level.
   5 *
   6 *              DECnet Device Layer
   7 *
   8 * Authors:     Steve Whitehouse <SteveW@ACM.org>
   9 *              Eduardo Marcelo Serrat <emserrat@geocities.com>
  10 *
  11 * Changes:
  12 *          Steve Whitehouse : Devices now see incoming frames so they
  13 *                             can mark on who it came from.
  14 *          Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
  15 *                             can now have a device specific setup func.
  16 *          Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
  17 *          Steve Whitehouse : Fixed bug which sometimes killed timer
  18 *          Steve Whitehouse : Multiple ifaddr support
  19 *          Steve Whitehouse : SIOCGIFCONF is now a compile time option
  20 *          Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
  21 *          Steve Whitehouse : Removed timer1 - it's a user space issue now
  22 *         Patrick Caulfield : Fixed router hello message format
  23 *          Steve Whitehouse : Got rid of constant sizes for blksize for
  24 *                             devices. All mtu based now.
  25 */
  26
  27#include <linux/capability.h>
  28#include <linux/module.h>
  29#include <linux/moduleparam.h>
  30#include <linux/init.h>
  31#include <linux/net.h>
  32#include <linux/netdevice.h>
  33#include <linux/proc_fs.h>
  34#include <linux/seq_file.h>
  35#include <linux/timer.h>
  36#include <linux/string.h>
  37#include <linux/if_addr.h>
  38#include <linux/if_arp.h>
  39#include <linux/if_ether.h>
  40#include <linux/skbuff.h>
  41#include <linux/sysctl.h>
  42#include <linux/notifier.h>
  43#include <linux/slab.h>
  44#include <asm/uaccess.h>
  45#include <net/net_namespace.h>
  46#include <net/neighbour.h>
  47#include <net/dst.h>
  48#include <net/flow.h>
  49#include <net/fib_rules.h>
  50#include <net/netlink.h>
  51#include <net/dn.h>
  52#include <net/dn_dev.h>
  53#include <net/dn_route.h>
  54#include <net/dn_neigh.h>
  55#include <net/dn_fib.h>
  56
  57#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
  58
  59static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
  60static char dn_rt_all_rt_mcast[ETH_ALEN]  = {0xAB,0x00,0x00,0x03,0x00,0x00};
  61static char dn_hiord[ETH_ALEN]            = {0xAA,0x00,0x04,0x00,0x00,0x00};
  62static unsigned char dn_eco_version[3]    = {0x02,0x00,0x00};
  63
  64extern struct neigh_table dn_neigh_table;
  65
  66/*
  67 * decnet_address is kept in network order.
  68 */
  69__le16 decnet_address = 0;
  70
  71static DEFINE_SPINLOCK(dndev_lock);
  72static struct net_device *decnet_default_device;
  73static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
  74
  75static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
  76static void dn_dev_delete(struct net_device *dev);
  77static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
  78
  79static int dn_eth_up(struct net_device *);
  80static void dn_eth_down(struct net_device *);
  81static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
  82static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
  83
  84static struct dn_dev_parms dn_dev_list[] =  {
  85{
  86        .type =         ARPHRD_ETHER, /* Ethernet */
  87        .mode =         DN_DEV_BCAST,
  88        .state =        DN_DEV_S_RU,
  89        .t2 =           1,
  90        .t3 =           10,
  91        .name =         "ethernet",
  92        .up =           dn_eth_up,
  93        .down =         dn_eth_down,
  94        .timer3 =       dn_send_brd_hello,
  95},
  96{
  97        .type =         ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
  98        .mode =         DN_DEV_BCAST,
  99        .state =        DN_DEV_S_RU,
 100        .t2 =           1,
 101        .t3 =           10,
 102        .name =         "ipgre",
 103        .timer3 =       dn_send_brd_hello,
 104},
 105#if 0
 106{
 107        .type =         ARPHRD_X25, /* Bog standard X.25 */
 108        .mode =         DN_DEV_UCAST,
 109        .state =        DN_DEV_S_DS,
 110        .t2 =           1,
 111        .t3 =           120,
 112        .name =         "x25",
 113        .timer3 =       dn_send_ptp_hello,
 114},
 115#endif
 116#if 0
 117{
 118        .type =         ARPHRD_PPP, /* DECnet over PPP */
 119        .mode =         DN_DEV_BCAST,
 120        .state =        DN_DEV_S_RU,
 121        .t2 =           1,
 122        .t3 =           10,
 123        .name =         "ppp",
 124        .timer3 =       dn_send_brd_hello,
 125},
 126#endif
 127{
 128        .type =         ARPHRD_DDCMP, /* DECnet over DDCMP */
 129        .mode =         DN_DEV_UCAST,
 130        .state =        DN_DEV_S_DS,
 131        .t2 =           1,
 132        .t3 =           120,
 133        .name =         "ddcmp",
 134        .timer3 =       dn_send_ptp_hello,
 135},
 136{
 137        .type =         ARPHRD_LOOPBACK, /* Loopback interface - always last */
 138        .mode =         DN_DEV_BCAST,
 139        .state =        DN_DEV_S_RU,
 140        .t2 =           1,
 141        .t3 =           10,
 142        .name =         "loopback",
 143        .timer3 =       dn_send_brd_hello,
 144}
 145};
 146
 147#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
 148
 149#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
 150
 151#ifdef CONFIG_SYSCTL
 152
 153static int min_t2[] = { 1 };
 154static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
 155static int min_t3[] = { 1 };
 156static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
 157
 158static int min_priority[1];
 159static int max_priority[] = { 127 }; /* From DECnet spec */
 160
 161static int dn_forwarding_proc(ctl_table *, int,
 162                        void __user *, size_t *, loff_t *);
 163static struct dn_dev_sysctl_table {
 164        struct ctl_table_header *sysctl_header;
 165        ctl_table dn_dev_vars[5];
 166} dn_dev_sysctl = {
 167        NULL,
 168        {
 169        {
 170                .procname = "forwarding",
 171                .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
 172                .maxlen = sizeof(int),
 173                .mode = 0644,
 174                .proc_handler = dn_forwarding_proc,
 175        },
 176        {
 177                .procname = "priority",
 178                .data = (void *)DN_DEV_PARMS_OFFSET(priority),
 179                .maxlen = sizeof(int),
 180                .mode = 0644,
 181                .proc_handler = proc_dointvec_minmax,
 182                .extra1 = &min_priority,
 183                .extra2 = &max_priority
 184        },
 185        {
 186                .procname = "t2",
 187                .data = (void *)DN_DEV_PARMS_OFFSET(t2),
 188                .maxlen = sizeof(int),
 189                .mode = 0644,
 190                .proc_handler = proc_dointvec_minmax,
 191                .extra1 = &min_t2,
 192                .extra2 = &max_t2
 193        },
 194        {
 195                .procname = "t3",
 196                .data = (void *)DN_DEV_PARMS_OFFSET(t3),
 197                .maxlen = sizeof(int),
 198                .mode = 0644,
 199                .proc_handler = proc_dointvec_minmax,
 200                .extra1 = &min_t3,
 201                .extra2 = &max_t3
 202        },
 203        {0}
 204        },
 205};
 206
 207static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
 208{
 209        struct dn_dev_sysctl_table *t;
 210        int i;
 211
 212        char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
 213
 214        t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
 215        if (t == NULL)
 216                return;
 217
 218        for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
 219                long offset = (long)t->dn_dev_vars[i].data;
 220                t->dn_dev_vars[i].data = ((char *)parms) + offset;
 221        }
 222
 223        snprintf(path, sizeof(path), "net/decnet/conf/%s",
 224                dev? dev->name : parms->name);
 225
 226        t->dn_dev_vars[0].extra1 = (void *)dev;
 227
 228        t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
 229        if (t->sysctl_header == NULL)
 230                kfree(t);
 231        else
 232                parms->sysctl = t;
 233}
 234
 235static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
 236{
 237        if (parms->sysctl) {
 238                struct dn_dev_sysctl_table *t = parms->sysctl;
 239                parms->sysctl = NULL;
 240                unregister_net_sysctl_table(t->sysctl_header);
 241                kfree(t);
 242        }
 243}
 244
 245static int dn_forwarding_proc(ctl_table *table, int write,
 246                                void __user *buffer,
 247                                size_t *lenp, loff_t *ppos)
 248{
 249#ifdef CONFIG_DECNET_ROUTER
 250        struct net_device *dev = table->extra1;
 251        struct dn_dev *dn_db;
 252        int err;
 253        int tmp, old;
 254
 255        if (table->extra1 == NULL)
 256                return -EINVAL;
 257
 258        dn_db = rcu_dereference_raw(dev->dn_ptr);
 259        old = dn_db->parms.forwarding;
 260
 261        err = proc_dointvec(table, write, buffer, lenp, ppos);
 262
 263        if ((err >= 0) && write) {
 264                if (dn_db->parms.forwarding < 0)
 265                        dn_db->parms.forwarding = 0;
 266                if (dn_db->parms.forwarding > 2)
 267                        dn_db->parms.forwarding = 2;
 268                /*
 269                 * What an ugly hack this is... its works, just. It
 270                 * would be nice if sysctl/proc were just that little
 271                 * bit more flexible so I don't have to write a special
 272                 * routine, or suffer hacks like this - SJW
 273                 */
 274                tmp = dn_db->parms.forwarding;
 275                dn_db->parms.forwarding = old;
 276                if (dn_db->parms.down)
 277                        dn_db->parms.down(dev);
 278                dn_db->parms.forwarding = tmp;
 279                if (dn_db->parms.up)
 280                        dn_db->parms.up(dev);
 281        }
 282
 283        return err;
 284#else
 285        return -EINVAL;
 286#endif
 287}
 288
 289#else /* CONFIG_SYSCTL */
 290static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
 291{
 292}
 293static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
 294{
 295}
 296
 297#endif /* CONFIG_SYSCTL */
 298
 299static inline __u16 mtu2blksize(struct net_device *dev)
 300{
 301        u32 blksize = dev->mtu;
 302        if (blksize > 0xffff)
 303                blksize = 0xffff;
 304
 305        if (dev->type == ARPHRD_ETHER ||
 306            dev->type == ARPHRD_PPP ||
 307            dev->type == ARPHRD_IPGRE ||
 308            dev->type == ARPHRD_LOOPBACK)
 309                blksize -= 2;
 310
 311        return (__u16)blksize;
 312}
 313
 314static struct dn_ifaddr *dn_dev_alloc_ifa(void)
 315{
 316        struct dn_ifaddr *ifa;
 317
 318        ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
 319
 320        return ifa;
 321}
 322
 323static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
 324{
 325        kfree_rcu(ifa, rcu);
 326}
 327
 328static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
 329{
 330        struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
 331        unsigned char mac_addr[6];
 332        struct net_device *dev = dn_db->dev;
 333
 334        ASSERT_RTNL();
 335
 336        *ifap = ifa1->ifa_next;
 337
 338        if (dn_db->dev->type == ARPHRD_ETHER) {
 339                if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
 340                        dn_dn2eth(mac_addr, ifa1->ifa_local);
 341                        dev_mc_del(dev, mac_addr);
 342                }
 343        }
 344
 345        dn_ifaddr_notify(RTM_DELADDR, ifa1);
 346        blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
 347        if (destroy) {
 348                dn_dev_free_ifa(ifa1);
 349
 350                if (dn_db->ifa_list == NULL)
 351                        dn_dev_delete(dn_db->dev);
 352        }
 353}
 354
 355static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
 356{
 357        struct net_device *dev = dn_db->dev;
 358        struct dn_ifaddr *ifa1;
 359        unsigned char mac_addr[6];
 360
 361        ASSERT_RTNL();
 362
 363        /* Check for duplicates */
 364        for (ifa1 = rtnl_dereference(dn_db->ifa_list);
 365             ifa1 != NULL;
 366             ifa1 = rtnl_dereference(ifa1->ifa_next)) {
 367                if (ifa1->ifa_local == ifa->ifa_local)
 368                        return -EEXIST;
 369        }
 370
 371        if (dev->type == ARPHRD_ETHER) {
 372                if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
 373                        dn_dn2eth(mac_addr, ifa->ifa_local);
 374                        dev_mc_add(dev, mac_addr);
 375                }
 376        }
 377
 378        ifa->ifa_next = dn_db->ifa_list;
 379        rcu_assign_pointer(dn_db->ifa_list, ifa);
 380
 381        dn_ifaddr_notify(RTM_NEWADDR, ifa);
 382        blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
 383
 384        return 0;
 385}
 386
 387static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
 388{
 389        struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
 390        int rv;
 391
 392        if (dn_db == NULL) {
 393                int err;
 394                dn_db = dn_dev_create(dev, &err);
 395                if (dn_db == NULL)
 396                        return err;
 397        }
 398
 399        ifa->ifa_dev = dn_db;
 400
 401        if (dev->flags & IFF_LOOPBACK)
 402                ifa->ifa_scope = RT_SCOPE_HOST;
 403
 404        rv = dn_dev_insert_ifa(dn_db, ifa);
 405        if (rv)
 406                dn_dev_free_ifa(ifa);
 407        return rv;
 408}
 409
 410
 411int dn_dev_ioctl(unsigned int cmd, void __user *arg)
 412{
 413        char buffer[DN_IFREQ_SIZE];
 414        struct ifreq *ifr = (struct ifreq *)buffer;
 415        struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
 416        struct dn_dev *dn_db;
 417        struct net_device *dev;
 418        struct dn_ifaddr *ifa = NULL;
 419        struct dn_ifaddr __rcu **ifap = NULL;
 420        int ret = 0;
 421
 422        if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
 423                return -EFAULT;
 424        ifr->ifr_name[IFNAMSIZ-1] = 0;
 425
 426        dev_load(&init_net, ifr->ifr_name);
 427
 428        switch (cmd) {
 429        case SIOCGIFADDR:
 430                break;
 431        case SIOCSIFADDR:
 432                if (!capable(CAP_NET_ADMIN))
 433                        return -EACCES;
 434                if (sdn->sdn_family != AF_DECnet)
 435                        return -EINVAL;
 436                break;
 437        default:
 438                return -EINVAL;
 439        }
 440
 441        rtnl_lock();
 442
 443        if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
 444                ret = -ENODEV;
 445                goto done;
 446        }
 447
 448        if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
 449                for (ifap = &dn_db->ifa_list;
 450                     (ifa = rtnl_dereference(*ifap)) != NULL;
 451                     ifap = &ifa->ifa_next)
 452                        if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
 453                                break;
 454        }
 455
 456        if (ifa == NULL && cmd != SIOCSIFADDR) {
 457                ret = -EADDRNOTAVAIL;
 458                goto done;
 459        }
 460
 461        switch (cmd) {
 462        case SIOCGIFADDR:
 463                *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
 464                goto rarok;
 465
 466        case SIOCSIFADDR:
 467                if (!ifa) {
 468                        if ((ifa = dn_dev_alloc_ifa()) == NULL) {
 469                                ret = -ENOBUFS;
 470                                break;
 471                        }
 472                        memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
 473                } else {
 474                        if (ifa->ifa_local == dn_saddr2dn(sdn))
 475                                break;
 476                        dn_dev_del_ifa(dn_db, ifap, 0);
 477                }
 478
 479                ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
 480
 481                ret = dn_dev_set_ifa(dev, ifa);
 482        }
 483done:
 484        rtnl_unlock();
 485
 486        return ret;
 487rarok:
 488        if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
 489                ret = -EFAULT;
 490        goto done;
 491}
 492
 493struct net_device *dn_dev_get_default(void)
 494{
 495        struct net_device *dev;
 496
 497        spin_lock(&dndev_lock);
 498        dev = decnet_default_device;
 499        if (dev) {
 500                if (dev->dn_ptr)
 501                        dev_hold(dev);
 502                else
 503                        dev = NULL;
 504        }
 505        spin_unlock(&dndev_lock);
 506
 507        return dev;
 508}
 509
 510int dn_dev_set_default(struct net_device *dev, int force)
 511{
 512        struct net_device *old = NULL;
 513        int rv = -EBUSY;
 514        if (!dev->dn_ptr)
 515                return -ENODEV;
 516
 517        spin_lock(&dndev_lock);
 518        if (force || decnet_default_device == NULL) {
 519                old = decnet_default_device;
 520                decnet_default_device = dev;
 521                rv = 0;
 522        }
 523        spin_unlock(&dndev_lock);
 524
 525        if (old)
 526                dev_put(old);
 527        return rv;
 528}
 529
 530static void dn_dev_check_default(struct net_device *dev)
 531{
 532        spin_lock(&dndev_lock);
 533        if (dev == decnet_default_device) {
 534                decnet_default_device = NULL;
 535        } else {
 536                dev = NULL;
 537        }
 538        spin_unlock(&dndev_lock);
 539
 540        if (dev)
 541                dev_put(dev);
 542}
 543
 544/*
 545 * Called with RTNL
 546 */
 547static struct dn_dev *dn_dev_by_index(int ifindex)
 548{
 549        struct net_device *dev;
 550        struct dn_dev *dn_dev = NULL;
 551
 552        dev = __dev_get_by_index(&init_net, ifindex);
 553        if (dev)
 554                dn_dev = rtnl_dereference(dev->dn_ptr);
 555
 556        return dn_dev;
 557}
 558
 559static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
 560        [IFA_ADDRESS]           = { .type = NLA_U16 },
 561        [IFA_LOCAL]             = { .type = NLA_U16 },
 562        [IFA_LABEL]             = { .type = NLA_STRING,
 563                                    .len = IFNAMSIZ - 1 },
 564};
 565
 566static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 567{
 568        struct net *net = sock_net(skb->sk);
 569        struct nlattr *tb[IFA_MAX+1];
 570        struct dn_dev *dn_db;
 571        struct ifaddrmsg *ifm;
 572        struct dn_ifaddr *ifa;
 573        struct dn_ifaddr __rcu **ifap;
 574        int err = -EINVAL;
 575
 576        if (!net_eq(net, &init_net))
 577                goto errout;
 578
 579        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
 580        if (err < 0)
 581                goto errout;
 582
 583        err = -ENODEV;
 584        ifm = nlmsg_data(nlh);
 585        if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
 586                goto errout;
 587
 588        err = -EADDRNOTAVAIL;
 589        for (ifap = &dn_db->ifa_list;
 590             (ifa = rtnl_dereference(*ifap)) != NULL;
 591             ifap = &ifa->ifa_next) {
 592                if (tb[IFA_LOCAL] &&
 593                    nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
 594                        continue;
 595
 596                if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
 597                        continue;
 598
 599                dn_dev_del_ifa(dn_db, ifap, 1);
 600                return 0;
 601        }
 602
 603errout:
 604        return err;
 605}
 606
 607static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 608{
 609        struct net *net = sock_net(skb->sk);
 610        struct nlattr *tb[IFA_MAX+1];
 611        struct net_device *dev;
 612        struct dn_dev *dn_db;
 613        struct ifaddrmsg *ifm;
 614        struct dn_ifaddr *ifa;
 615        int err;
 616
 617        if (!net_eq(net, &init_net))
 618                return -EINVAL;
 619
 620        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
 621        if (err < 0)
 622                return err;
 623
 624        if (tb[IFA_LOCAL] == NULL)
 625                return -EINVAL;
 626
 627        ifm = nlmsg_data(nlh);
 628        if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
 629                return -ENODEV;
 630
 631        if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
 632                dn_db = dn_dev_create(dev, &err);
 633                if (!dn_db)
 634                        return err;
 635        }
 636
 637        if ((ifa = dn_dev_alloc_ifa()) == NULL)
 638                return -ENOBUFS;
 639
 640        if (tb[IFA_ADDRESS] == NULL)
 641                tb[IFA_ADDRESS] = tb[IFA_LOCAL];
 642
 643        ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
 644        ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
 645        ifa->ifa_flags = ifm->ifa_flags;
 646        ifa->ifa_scope = ifm->ifa_scope;
 647        ifa->ifa_dev = dn_db;
 648
 649        if (tb[IFA_LABEL])
 650                nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
 651        else
 652                memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
 653
 654        err = dn_dev_insert_ifa(dn_db, ifa);
 655        if (err)
 656                dn_dev_free_ifa(ifa);
 657
 658        return err;
 659}
 660
 661static inline size_t dn_ifaddr_nlmsg_size(void)
 662{
 663        return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
 664               + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
 665               + nla_total_size(2) /* IFA_ADDRESS */
 666               + nla_total_size(2); /* IFA_LOCAL */
 667}
 668
 669static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
 670                             u32 portid, u32 seq, int event, unsigned int flags)
 671{
 672        struct ifaddrmsg *ifm;
 673        struct nlmsghdr *nlh;
 674
 675        nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
 676        if (nlh == NULL)
 677                return -EMSGSIZE;
 678
 679        ifm = nlmsg_data(nlh);
 680        ifm->ifa_family = AF_DECnet;
 681        ifm->ifa_prefixlen = 16;
 682        ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
 683        ifm->ifa_scope = ifa->ifa_scope;
 684        ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
 685
 686        if ((ifa->ifa_address &&
 687             nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) ||
 688            (ifa->ifa_local &&
 689             nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) ||
 690            (ifa->ifa_label[0] &&
 691             nla_put_string(skb, IFA_LABEL, ifa->ifa_label)))
 692                goto nla_put_failure;
 693        return nlmsg_end(skb, nlh);
 694
 695nla_put_failure:
 696        nlmsg_cancel(skb, nlh);
 697        return -EMSGSIZE;
 698}
 699
 700static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
 701{
 702        struct sk_buff *skb;
 703        int err = -ENOBUFS;
 704
 705        skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
 706        if (skb == NULL)
 707                goto errout;
 708
 709        err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
 710        if (err < 0) {
 711                /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
 712                WARN_ON(err == -EMSGSIZE);
 713                kfree_skb(skb);
 714                goto errout;
 715        }
 716        rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
 717        return;
 718errout:
 719        if (err < 0)
 720                rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
 721}
 722
 723static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 724{
 725        struct net *net = sock_net(skb->sk);
 726        int idx, dn_idx = 0, skip_ndevs, skip_naddr;
 727        struct net_device *dev;
 728        struct dn_dev *dn_db;
 729        struct dn_ifaddr *ifa;
 730
 731        if (!net_eq(net, &init_net))
 732                return 0;
 733
 734        skip_ndevs = cb->args[0];
 735        skip_naddr = cb->args[1];
 736
 737        idx = 0;
 738        rcu_read_lock();
 739        for_each_netdev_rcu(&init_net, dev) {
 740                if (idx < skip_ndevs)
 741                        goto cont;
 742                else if (idx > skip_ndevs) {
 743                        /* Only skip over addresses for first dev dumped
 744                         * in this iteration (idx == skip_ndevs) */
 745                        skip_naddr = 0;
 746                }
 747
 748                if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
 749                        goto cont;
 750
 751                for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
 752                     ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
 753                        if (dn_idx < skip_naddr)
 754                                continue;
 755
 756                        if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
 757                                              cb->nlh->nlmsg_seq, RTM_NEWADDR,
 758                                              NLM_F_MULTI) < 0)
 759                                goto done;
 760                }
 761cont:
 762                idx++;
 763        }
 764done:
 765        rcu_read_unlock();
 766        cb->args[0] = idx;
 767        cb->args[1] = dn_idx;
 768
 769        return skb->len;
 770}
 771
 772static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
 773{
 774        struct dn_dev *dn_db;
 775        struct dn_ifaddr *ifa;
 776        int rv = -ENODEV;
 777
 778        rcu_read_lock();
 779        dn_db = rcu_dereference(dev->dn_ptr);
 780        if (dn_db == NULL)
 781                goto out;
 782
 783        ifa = rcu_dereference(dn_db->ifa_list);
 784        if (ifa != NULL) {
 785                *addr = ifa->ifa_local;
 786                rv = 0;
 787        }
 788out:
 789        rcu_read_unlock();
 790        return rv;
 791}
 792
 793/*
 794 * Find a default address to bind to.
 795 *
 796 * This is one of those areas where the initial VMS concepts don't really
 797 * map onto the Linux concepts, and since we introduced multiple addresses
 798 * per interface we have to cope with slightly odd ways of finding out what
 799 * "our address" really is. Mostly it's not a problem; for this we just guess
 800 * a sensible default. Eventually the routing code will take care of all the
 801 * nasties for us I hope.
 802 */
 803int dn_dev_bind_default(__le16 *addr)
 804{
 805        struct net_device *dev;
 806        int rv;
 807        dev = dn_dev_get_default();
 808last_chance:
 809        if (dev) {
 810                rv = dn_dev_get_first(dev, addr);
 811                dev_put(dev);
 812                if (rv == 0 || dev == init_net.loopback_dev)
 813                        return rv;
 814        }
 815        dev = init_net.loopback_dev;
 816        dev_hold(dev);
 817        goto last_chance;
 818}
 819
 820static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
 821{
 822        struct endnode_hello_message *msg;
 823        struct sk_buff *skb = NULL;
 824        __le16 *pktlen;
 825        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
 826
 827        if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
 828                return;
 829
 830        skb->dev = dev;
 831
 832        msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
 833
 834        msg->msgflg  = 0x0D;
 835        memcpy(msg->tiver, dn_eco_version, 3);
 836        dn_dn2eth(msg->id, ifa->ifa_local);
 837        msg->iinfo   = DN_RT_INFO_ENDN;
 838        msg->blksize = cpu_to_le16(mtu2blksize(dev));
 839        msg->area    = 0x00;
 840        memset(msg->seed, 0, 8);
 841        memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
 842
 843        if (dn_db->router) {
 844                struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
 845                dn_dn2eth(msg->neighbor, dn->addr);
 846        }
 847
 848        msg->timer   = cpu_to_le16((unsigned short)dn_db->parms.t3);
 849        msg->mpd     = 0x00;
 850        msg->datalen = 0x02;
 851        memset(msg->data, 0xAA, 2);
 852
 853        pktlen = (__le16 *)skb_push(skb,2);
 854        *pktlen = cpu_to_le16(skb->len - 2);
 855
 856        skb_reset_network_header(skb);
 857
 858        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
 859}
 860
 861
 862#define DRDELAY (5 * HZ)
 863
 864static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
 865{
 866        /* First check time since device went up */
 867        if ((jiffies - dn_db->uptime) < DRDELAY)
 868                return 0;
 869
 870        /* If there is no router, then yes... */
 871        if (!dn_db->router)
 872                return 1;
 873
 874        /* otherwise only if we have a higher priority or.. */
 875        if (dn->priority < dn_db->parms.priority)
 876                return 1;
 877
 878        /* if we have equal priority and a higher node number */
 879        if (dn->priority != dn_db->parms.priority)
 880                return 0;
 881
 882        if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
 883                return 1;
 884
 885        return 0;
 886}
 887
 888static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
 889{
 890        int n;
 891        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
 892        struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
 893        struct sk_buff *skb;
 894        size_t size;
 895        unsigned char *ptr;
 896        unsigned char *i1, *i2;
 897        __le16 *pktlen;
 898        char *src;
 899
 900        if (mtu2blksize(dev) < (26 + 7))
 901                return;
 902
 903        n = mtu2blksize(dev) - 26;
 904        n /= 7;
 905
 906        if (n > 32)
 907                n = 32;
 908
 909        size = 2 + 26 + 7 * n;
 910
 911        if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
 912                return;
 913
 914        skb->dev = dev;
 915        ptr = skb_put(skb, size);
 916
 917        *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
 918        *ptr++ = 2; /* ECO */
 919        *ptr++ = 0;
 920        *ptr++ = 0;
 921        dn_dn2eth(ptr, ifa->ifa_local);
 922        src = ptr;
 923        ptr += ETH_ALEN;
 924        *ptr++ = dn_db->parms.forwarding == 1 ?
 925                        DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
 926        *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
 927        ptr += 2;
 928        *ptr++ = dn_db->parms.priority; /* Priority */
 929        *ptr++ = 0; /* Area: Reserved */
 930        *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
 931        ptr += 2;
 932        *ptr++ = 0; /* MPD: Reserved */
 933        i1 = ptr++;
 934        memset(ptr, 0, 7); /* Name: Reserved */
 935        ptr += 7;
 936        i2 = ptr++;
 937
 938        n = dn_neigh_elist(dev, ptr, n);
 939
 940        *i2 = 7 * n;
 941        *i1 = 8 + *i2;
 942
 943        skb_trim(skb, (27 + *i2));
 944
 945        pktlen = (__le16 *)skb_push(skb, 2);
 946        *pktlen = cpu_to_le16(skb->len - 2);
 947
 948        skb_reset_network_header(skb);
 949
 950        if (dn_am_i_a_router(dn, dn_db, ifa)) {
 951                struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
 952                if (skb2) {
 953                        dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
 954                }
 955        }
 956
 957        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
 958}
 959
 960static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
 961{
 962        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
 963
 964        if (dn_db->parms.forwarding == 0)
 965                dn_send_endnode_hello(dev, ifa);
 966        else
 967                dn_send_router_hello(dev, ifa);
 968}
 969
 970static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
 971{
 972        int tdlen = 16;
 973        int size = dev->hard_header_len + 2 + 4 + tdlen;
 974        struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
 975        int i;
 976        unsigned char *ptr;
 977        char src[ETH_ALEN];
 978
 979        if (skb == NULL)
 980                return ;
 981
 982        skb->dev = dev;
 983        skb_push(skb, dev->hard_header_len);
 984        ptr = skb_put(skb, 2 + 4 + tdlen);
 985
 986        *ptr++ = DN_RT_PKT_HELO;
 987        *((__le16 *)ptr) = ifa->ifa_local;
 988        ptr += 2;
 989        *ptr++ = tdlen;
 990
 991        for(i = 0; i < tdlen; i++)
 992                *ptr++ = 0252;
 993
 994        dn_dn2eth(src, ifa->ifa_local);
 995        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
 996}
 997
 998static int dn_eth_up(struct net_device *dev)
 999{
1000        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
1001
1002        if (dn_db->parms.forwarding == 0)
1003                dev_mc_add(dev, dn_rt_all_end_mcast);
1004        else
1005                dev_mc_add(dev, dn_rt_all_rt_mcast);
1006
1007        dn_db->use_long = 1;
1008
1009        return 0;
1010}
1011
1012static void dn_eth_down(struct net_device *dev)
1013{
1014        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
1015
1016        if (dn_db->parms.forwarding == 0)
1017                dev_mc_del(dev, dn_rt_all_end_mcast);
1018        else
1019                dev_mc_del(dev, dn_rt_all_rt_mcast);
1020}
1021
1022static void dn_dev_set_timer(struct net_device *dev);
1023
1024static void dn_dev_timer_func(unsigned long arg)
1025{
1026        struct net_device *dev = (struct net_device *)arg;
1027        struct dn_dev *dn_db;
1028        struct dn_ifaddr *ifa;
1029
1030        rcu_read_lock();
1031        dn_db = rcu_dereference(dev->dn_ptr);
1032        if (dn_db->t3 <= dn_db->parms.t2) {
1033                if (dn_db->parms.timer3) {
1034                        for (ifa = rcu_dereference(dn_db->ifa_list);
1035                             ifa;
1036                             ifa = rcu_dereference(ifa->ifa_next)) {
1037                                if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1038                                        dn_db->parms.timer3(dev, ifa);
1039                        }
1040                }
1041                dn_db->t3 = dn_db->parms.t3;
1042        } else {
1043                dn_db->t3 -= dn_db->parms.t2;
1044        }
1045        rcu_read_unlock();
1046        dn_dev_set_timer(dev);
1047}
1048
1049static void dn_dev_set_timer(struct net_device *dev)
1050{
1051        struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
1052
1053        if (dn_db->parms.t2 > dn_db->parms.t3)
1054                dn_db->parms.t2 = dn_db->parms.t3;
1055
1056        dn_db->timer.data = (unsigned long)dev;
1057        dn_db->timer.function = dn_dev_timer_func;
1058        dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1059
1060        add_timer(&dn_db->timer);
1061}
1062
1063static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1064{
1065        int i;
1066        struct dn_dev_parms *p = dn_dev_list;
1067        struct dn_dev *dn_db;
1068
1069        for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1070                if (p->type == dev->type)
1071                        break;
1072        }
1073
1074        *err = -ENODEV;
1075        if (i == DN_DEV_LIST_SIZE)
1076                return NULL;
1077
1078        *err = -ENOBUFS;
1079        if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1080                return NULL;
1081
1082        memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1083
1084        rcu_assign_pointer(dev->dn_ptr, dn_db);
1085        dn_db->dev = dev;
1086        init_timer(&dn_db->timer);
1087
1088        dn_db->uptime = jiffies;
1089
1090        dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1091        if (!dn_db->neigh_parms) {
1092                RCU_INIT_POINTER(dev->dn_ptr, NULL);
1093                kfree(dn_db);
1094                return NULL;
1095        }
1096
1097        if (dn_db->parms.up) {
1098                if (dn_db->parms.up(dev) < 0) {
1099                        neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1100                        dev->dn_ptr = NULL;
1101                        kfree(dn_db);
1102                        return NULL;
1103                }
1104        }
1105
1106        dn_dev_sysctl_register(dev, &dn_db->parms);
1107
1108        dn_dev_set_timer(dev);
1109
1110        *err = 0;
1111        return dn_db;
1112}
1113
1114
1115/*
1116 * This processes a device up event. We only start up
1117 * the loopback device & ethernet devices with correct
1118 * MAC addresses automatically. Others must be started
1119 * specifically.
1120 *
1121 * FIXME: How should we configure the loopback address ? If we could dispense
1122 * with using decnet_address here and for autobind, it will be one less thing
1123 * for users to worry about setting up.
1124 */
1125
1126void dn_dev_up(struct net_device *dev)
1127{
1128        struct dn_ifaddr *ifa;
1129        __le16 addr = decnet_address;
1130        int maybe_default = 0;
1131        struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
1132
1133        if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1134                return;
1135
1136        /*
1137         * Need to ensure that loopback device has a dn_db attached to it
1138         * to allow creation of neighbours against it, even though it might
1139         * not have a local address of its own. Might as well do the same for
1140         * all autoconfigured interfaces.
1141         */
1142        if (dn_db == NULL) {
1143                int err;
1144                dn_db = dn_dev_create(dev, &err);
1145                if (dn_db == NULL)
1146                        return;
1147        }
1148
1149        if (dev->type == ARPHRD_ETHER) {
1150                if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1151                        return;
1152                addr = dn_eth2dn(dev->dev_addr);
1153                maybe_default = 1;
1154        }
1155
1156        if (addr == 0)
1157                return;
1158
1159        if ((ifa = dn_dev_alloc_ifa()) == NULL)
1160                return;
1161
1162        ifa->ifa_local = ifa->ifa_address = addr;
1163        ifa->ifa_flags = 0;
1164        ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1165        strcpy(ifa->ifa_label, dev->name);
1166
1167        dn_dev_set_ifa(dev, ifa);
1168
1169        /*
1170         * Automagically set the default device to the first automatically
1171         * configured ethernet card in the system.
1172         */
1173        if (maybe_default) {
1174                dev_hold(dev);
1175                if (dn_dev_set_default(dev, 0))
1176                        dev_put(dev);
1177        }
1178}
1179
1180static void dn_dev_delete(struct net_device *dev)
1181{
1182        struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
1183
1184        if (dn_db == NULL)
1185                return;
1186
1187        del_timer_sync(&dn_db->timer);
1188        dn_dev_sysctl_unregister(&dn_db->parms);
1189        dn_dev_check_default(dev);
1190        neigh_ifdown(&dn_neigh_table, dev);
1191
1192        if (dn_db->parms.down)
1193                dn_db->parms.down(dev);
1194
1195        dev->dn_ptr = NULL;
1196
1197        neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1198        neigh_ifdown(&dn_neigh_table, dev);
1199
1200        if (dn_db->router)
1201                neigh_release(dn_db->router);
1202        if (dn_db->peer)
1203                neigh_release(dn_db->peer);
1204
1205        kfree(dn_db);
1206}
1207
1208void dn_dev_down(struct net_device *dev)
1209{
1210        struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
1211        struct dn_ifaddr *ifa;
1212
1213        if (dn_db == NULL)
1214                return;
1215
1216        while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
1217                dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1218                dn_dev_free_ifa(ifa);
1219        }
1220
1221        dn_dev_delete(dev);
1222}
1223
1224void dn_dev_init_pkt(struct sk_buff *skb)
1225{
1226}
1227
1228void dn_dev_veri_pkt(struct sk_buff *skb)
1229{
1230}
1231
1232void dn_dev_hello(struct sk_buff *skb)
1233{
1234}
1235
1236void dn_dev_devices_off(void)
1237{
1238        struct net_device *dev;
1239
1240        rtnl_lock();
1241        for_each_netdev(&init_net, dev)
1242                dn_dev_down(dev);
1243        rtnl_unlock();
1244
1245}
1246
1247void dn_dev_devices_on(void)
1248{
1249        struct net_device *dev;
1250
1251        rtnl_lock();
1252        for_each_netdev(&init_net, dev) {
1253                if (dev->flags & IFF_UP)
1254                        dn_dev_up(dev);
1255        }
1256        rtnl_unlock();
1257}
1258
1259int register_dnaddr_notifier(struct notifier_block *nb)
1260{
1261        return blocking_notifier_chain_register(&dnaddr_chain, nb);
1262}
1263
1264int unregister_dnaddr_notifier(struct notifier_block *nb)
1265{
1266        return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1267}
1268
1269#ifdef CONFIG_PROC_FS
1270static inline int is_dn_dev(struct net_device *dev)
1271{
1272        return dev->dn_ptr != NULL;
1273}
1274
1275static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1276        __acquires(RCU)
1277{
1278        int i;
1279        struct net_device *dev;
1280
1281        rcu_read_lock();
1282
1283        if (*pos == 0)
1284                return SEQ_START_TOKEN;
1285
1286        i = 1;
1287        for_each_netdev_rcu(&init_net, dev) {
1288                if (!is_dn_dev(dev))
1289                        continue;
1290
1291                if (i++ == *pos)
1292                        return dev;
1293        }
1294
1295        return NULL;
1296}
1297
1298static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1299{
1300        struct net_device *dev;
1301
1302        ++*pos;
1303
1304        dev = v;
1305        if (v == SEQ_START_TOKEN)
1306                dev = net_device_entry(&init_net.dev_base_head);
1307
1308        for_each_netdev_continue_rcu(&init_net, dev) {
1309                if (!is_dn_dev(dev))
1310                        continue;
1311
1312                return dev;
1313        }
1314
1315        return NULL;
1316}
1317
1318static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1319        __releases(RCU)
1320{
1321        rcu_read_unlock();
1322}
1323
1324static char *dn_type2asc(char type)
1325{
1326        switch (type) {
1327        case DN_DEV_BCAST:
1328                return "B";
1329        case DN_DEV_UCAST:
1330                return "U";
1331        case DN_DEV_MPOINT:
1332                return "M";
1333        }
1334
1335        return "?";
1336}
1337
1338static int dn_dev_seq_show(struct seq_file *seq, void *v)
1339{
1340        if (v == SEQ_START_TOKEN)
1341                seq_puts(seq, "Name     Flags T1   Timer1 T3   Timer3 BlkSize Pri State DevType    Router Peer\n");
1342        else {
1343                struct net_device *dev = v;
1344                char peer_buf[DN_ASCBUF_LEN];
1345                char router_buf[DN_ASCBUF_LEN];
1346                struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
1347
1348                seq_printf(seq, "%-8s %1s     %04u %04u   %04lu %04lu"
1349                                "   %04hu    %03d %02x    %-10s %-7s %-7s\n",
1350                                dev->name ? dev->name : "???",
1351                                dn_type2asc(dn_db->parms.mode),
1352                                0, 0,
1353                                dn_db->t3, dn_db->parms.t3,
1354                                mtu2blksize(dev),
1355                                dn_db->parms.priority,
1356                                dn_db->parms.state, dn_db->parms.name,
1357                                dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1358                                dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1359        }
1360        return 0;
1361}
1362
1363static const struct seq_operations dn_dev_seq_ops = {
1364        .start  = dn_dev_seq_start,
1365        .next   = dn_dev_seq_next,
1366        .stop   = dn_dev_seq_stop,
1367        .show   = dn_dev_seq_show,
1368};
1369
1370static int dn_dev_seq_open(struct inode *inode, struct file *file)
1371{
1372        return seq_open(file, &dn_dev_seq_ops);
1373}
1374
1375static const struct file_operations dn_dev_seq_fops = {
1376        .owner   = THIS_MODULE,
1377        .open    = dn_dev_seq_open,
1378        .read    = seq_read,
1379        .llseek  = seq_lseek,
1380        .release = seq_release,
1381};
1382
1383#endif /* CONFIG_PROC_FS */
1384
1385static int addr[2];
1386module_param_array(addr, int, NULL, 0444);
1387MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1388
1389void __init dn_dev_init(void)
1390{
1391        if (addr[0] > 63 || addr[0] < 0) {
1392                printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1393                return;
1394        }
1395
1396        if (addr[1] > 1023 || addr[1] < 0) {
1397                printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1398                return;
1399        }
1400
1401        decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1402
1403        dn_dev_devices_on();
1404
1405        rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL);
1406        rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL);
1407        rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL);
1408
1409        proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1410
1411#ifdef CONFIG_SYSCTL
1412        {
1413                int i;
1414                for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1415                        dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1416        }
1417#endif /* CONFIG_SYSCTL */
1418}
1419
1420void __exit dn_dev_cleanup(void)
1421{
1422#ifdef CONFIG_SYSCTL
1423        {
1424                int i;
1425                for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1426                        dn_dev_sysctl_unregister(&dn_dev_list[i]);
1427        }
1428#endif /* CONFIG_SYSCTL */
1429
1430        proc_net_remove(&init_net, "decnet_dev");
1431
1432        dn_dev_devices_off();
1433}
1434
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.