net/atm/lec.c

   1 /*
   2  * lec.c: Lan Emulation driver
   3  *
   4  * Marko Kiiskila <mkiiskila@yahoo.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/bitops.h>
   9 #include <linux/capability.h>
  10
  11 /* We are ethernet device */
  12 #include <linux/if_ether.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <net/sock.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/ip.h>
  18 #include <asm/byteorder.h>
  19 #include <asm/uaccess.h>
  20 #include <net/arp.h>
  21 #include <net/dst.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/seq_file.h>
  25
  26 /* TokenRing if needed */
  27 #ifdef CONFIG_TR
  28 #include <linux/trdevice.h>
  29 #endif
  30
  31 /* And atm device */
  32 #include <linux/atmdev.h>
  33 #include <linux/atmlec.h>
  34
  35 /* Proxy LEC knows about bridging */
  36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
  37 #include "../bridge/br_private.h"
  38
  39 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
  40 #endif
  41
  42 /* Modular too */
  43 #include <linux/module.h>
  44 #include <linux/init.h>
  45
  46 #include "lec.h"
  47 #include "lec_arpc.h"
  48 #include "resources.h"
  49
  50 #define DUMP_PACKETS 0          /*
  51                                  * 0 = None,
  52                                  * 1 = 30 first bytes
  53                                  * 2 = Whole packet
  54                                  */
  55
  56 #define LEC_UNRES_QUE_LEN 8     /*
  57                                  * number of tx packets to queue for a
  58                                  * single destination while waiting for SVC
  59                                  */
  60
  61 static int lec_open(struct net_device *dev);
  62 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
  63                                   struct net_device *dev);
  64 static int lec_close(struct net_device *dev);
  65 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
  66                                           const unsigned char *mac_addr);
  67 static int lec_arp_remove(struct lec_priv *priv,
  68                           struct lec_arp_table *to_remove);
  69 /* LANE2 functions */
  70 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
  71                                 const u8 *tlvs, u32 sizeoftlvs);
  72 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
  73                          u8 **tlvs, u32 *sizeoftlvs);
  74 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
  75                                const u8 *tlvs, u32 sizeoftlvs);
  76
  77 static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
  78                            unsigned long permanent);
  79 static void lec_arp_check_empties(struct lec_priv *priv,
  80                                   struct atm_vcc *vcc, struct sk_buff *skb);
  81 static void lec_arp_destroy(struct lec_priv *priv);
  82 static void lec_arp_init(struct lec_priv *priv);
  83 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
  84                                        const unsigned char *mac_to_find,
  85                                        int is_rdesc,
  86                                        struct lec_arp_table **ret_entry);
  87 static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
  88                            const unsigned char *atm_addr, unsigned long remoteflag,
  89                            unsigned int targetless_le_arp);
  90 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
  91 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
  92 static void lec_set_flush_tran_id(struct lec_priv *priv,
  93                                   const unsigned char *atm_addr,
  94                                   unsigned long tran_id);
  95 static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
  96                           struct atm_vcc *vcc,
  97                           void (*old_push) (struct atm_vcc *vcc,
  98                                             struct sk_buff *skb));
  99 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
 100
 101 /* must be done under lec_arp_lock */
 102 static inline void lec_arp_hold(struct lec_arp_table *entry)
 103 {
 104         atomic_inc(&entry->usage);
 105 }
 106
 107 static inline void lec_arp_put(struct lec_arp_table *entry)
 108 {
 109         if (atomic_dec_and_test(&entry->usage))
 110                 kfree(entry);
 111 }
 112
 113
 114 static struct lane2_ops lane2_ops = {
 115         lane2_resolve,          /* resolve,             spec 3.1.3 */
 116         lane2_associate_req,    /* associate_req,       spec 3.1.4 */
 117         NULL                    /* associate indicator, spec 3.1.5 */
 118 };
 119
 120 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 121
 122 /* Device structures */
 123 static struct net_device *dev_lec[MAX_LEC_ITF];
 124
 125 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 126 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
 127 {
 128         struct ethhdr *eth;
 129         char *buff;
 130         struct lec_priv *priv;
 131
 132         /*
 133          * Check if this is a BPDU. If so, ask zeppelin to send
 134          * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
 135          * as the Config BPDU has
 136          */
 137         eth = (struct ethhdr *)skb->data;
 138         buff = skb->data + skb->dev->hard_header_len;
 139         if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
 140                 struct sock *sk;
 141                 struct sk_buff *skb2;
 142                 struct atmlec_msg *mesg;
 143
 144                 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 145                 if (skb2 == NULL)
 146                         return;
 147                 skb2->len = sizeof(struct atmlec_msg);
 148                 mesg = (struct atmlec_msg *)skb2->data;
 149                 mesg->type = l_topology_change;
 150                 buff += 4;
 151                 mesg->content.normal.flag = *buff & 0x01;       /* 0x01 is topology change */
 152
 153                 priv = netdev_priv(dev);
 154                 atm_force_charge(priv->lecd, skb2->truesize);
 155                 sk = sk_atm(priv->lecd);
 156                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 157                 sk->sk_data_ready(sk, skb2->len);
 158         }
 159
 160         return;
 161 }
 162 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 163
 164 /*
 165  * Modelled after tr_type_trans
 166  * All multicast and ARE or STE frames go to BUS.
 167  * Non source routed frames go by destination address.
 168  * Last hop source routed frames go by destination address.
 169  * Not last hop source routed frames go by _next_ route descriptor.
 170  * Returns pointer to destination MAC address or fills in rdesc
 171  * and returns NULL.
 172  */
 173 #ifdef CONFIG_TR
 174 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
 175 {
 176         struct trh_hdr *trh;
 177         unsigned int riflen, num_rdsc;
 178
 179         trh = (struct trh_hdr *)packet;
 180         if (trh->daddr[0] & (uint8_t) 0x80)
 181                 return bus_mac; /* multicast */
 182
 183         if (trh->saddr[0] & TR_RII) {
 184                 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
 185                 if ((ntohs(trh->rcf) >> 13) != 0)
 186                         return bus_mac; /* ARE or STE */
 187         } else
 188                 return trh->daddr;      /* not source routed */
 189
 190         if (riflen < 6)
 191                 return trh->daddr;      /* last hop, source routed */
 192
 193         /* riflen is 6 or more, packet has more than one route descriptor */
 194         num_rdsc = (riflen / 2) - 1;
 195         memset(rdesc, 0, ETH_ALEN);
 196         /* offset 4 comes from LAN destination field in LE control frames */
 197         if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
 198                 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
 199         else {
 200                 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
 201                 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
 202         }
 203
 204         return NULL;
 205 }
 206 #endif /* CONFIG_TR */
 207
 208 /*
 209  * Open/initialize the netdevice. This is called (in the current kernel)
 210  * sometime after booting when the 'ifconfig' program is run.
 211  *
 212  * This routine should set everything up anew at each open, even
 213  * registers that "should" only need to be set once at boot, so that
 214  * there is non-reboot way to recover if something goes wrong.
 215  */
 216
 217 static int lec_open(struct net_device *dev)
 218 {
 219         netif_start_queue(dev);
 220         memset(&dev->stats, 0, sizeof(struct net_device_stats));
 221
 222         return 0;
 223 }
 224
 225 static void
 226 lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
 227 {
 228         struct net_device *dev = skb->dev;
 229
 230         ATM_SKB(skb)->vcc = vcc;
 231         ATM_SKB(skb)->atm_options = vcc->atm_options;
 232
 233         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 234         if (vcc->send(vcc, skb) < 0) {
 235                 dev->stats.tx_dropped++;
 236                 return;
 237         }
 238
 239         dev->stats.tx_packets++;
 240         dev->stats.tx_bytes += skb->len;
 241 }
 242
 243 static void lec_tx_timeout(struct net_device *dev)
 244 {
 245         printk(KERN_INFO "%s: tx timeout\n", dev->name);
 246         dev->trans_start = jiffies;
 247         netif_wake_queue(dev);
 248 }
 249
 250 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
 251                                   struct net_device *dev)
 252 {
 253         struct sk_buff *skb2;
 254         struct lec_priv *priv = netdev_priv(dev);
 255         struct lecdatahdr_8023 *lec_h;
 256         struct atm_vcc *vcc;
 257         struct lec_arp_table *entry;
 258         unsigned char *dst;
 259         int min_frame_size;
 260 #ifdef CONFIG_TR
 261         unsigned char rdesc[ETH_ALEN];  /* Token Ring route descriptor */
 262 #endif
 263         int is_rdesc;
 264 #if DUMP_PACKETS > 0
 265         char buf[300];
 266         int i = 0;
 267 #endif /* DUMP_PACKETS >0 */
 268
 269         pr_debug("lec_start_xmit called\n");
 270         if (!priv->lecd) {
 271                 printk("%s:No lecd attached\n", dev->name);
 272                 dev->stats.tx_errors++;
 273                 netif_stop_queue(dev);
 274                 kfree_skb(skb);
 275                 return NETDEV_TX_OK;
 276         }
 277
 278         pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
 279                 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
 280                 (long)skb_end_pointer(skb));
 281 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 282         if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
 283                 lec_handle_bridge(skb, dev);
 284 #endif
 285
 286         /* Make sure we have room for lec_id */
 287         if (skb_headroom(skb) < 2) {
 288
 289                 pr_debug("lec_start_xmit: reallocating skb\n");
 290                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 291                 kfree_skb(skb);
 292                 if (skb2 == NULL)
 293                         return NETDEV_TX_OK;
 294                 skb = skb2;
 295         }
 296         skb_push(skb, 2);
 297
 298         /* Put le header to place, works for TokenRing too */
 299         lec_h = (struct lecdatahdr_8023 *)skb->data;
 300         lec_h->le_header = htons(priv->lecid);
 301
 302 #ifdef CONFIG_TR
 303         /*
 304          * Ugly. Use this to realign Token Ring packets for
 305          * e.g. PCA-200E driver.
 306          */
 307         if (priv->is_trdev) {
 308                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 309                 kfree_skb(skb);
 310                 if (skb2 == NULL)
 311                         return NETDEV_TX_OK;
 312                 skb = skb2;
 313         }
 314 #endif
 315
 316 #if DUMP_PACKETS > 0
 317         printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
 318                skb->len, priv->lecid);
 319 #if DUMP_PACKETS >= 2
 320         for (i = 0; i < skb->len && i < 99; i++) {
 321                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 322         }
 323 #elif DUMP_PACKETS >= 1
 324         for (i = 0; i < skb->len && i < 30; i++) {
 325                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 326         }
 327 #endif /* DUMP_PACKETS >= 1 */
 328         if (i == skb->len)
 329                 printk("%s\n", buf);
 330         else
 331                 printk("%s...\n", buf);
 332 #endif /* DUMP_PACKETS > 0 */
 333
 334         /* Minimum ethernet-frame size */
 335 #ifdef CONFIG_TR
 336         if (priv->is_trdev)
 337                 min_frame_size = LEC_MINIMUM_8025_SIZE;
 338         else
 339 #endif
 340                 min_frame_size = LEC_MINIMUM_8023_SIZE;
 341         if (skb->len < min_frame_size) {
 342                 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
 343                         skb2 = skb_copy_expand(skb, 0,
 344                                                min_frame_size - skb->truesize,
 345                                                GFP_ATOMIC);
 346                         dev_kfree_skb(skb);
 347                         if (skb2 == NULL) {
 348                                 dev->stats.tx_dropped++;
 349                                 return NETDEV_TX_OK;
 350                         }
 351                         skb = skb2;
 352                 }
 353                 skb_put(skb, min_frame_size - skb->len);
 354         }
 355
 356         /* Send to right vcc */
 357         is_rdesc = 0;
 358         dst = lec_h->h_dest;
 359 #ifdef CONFIG_TR
 360         if (priv->is_trdev) {
 361                 dst = get_tr_dst(skb->data + 2, rdesc);
 362                 if (dst == NULL) {
 363                         dst = rdesc;
 364                         is_rdesc = 1;
 365                 }
 366         }
 367 #endif
 368         entry = NULL;
 369         vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
 370         pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
 371                 vcc, vcc ? vcc->flags : 0, entry);
 372         if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
 373                 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
 374                         pr_debug("%s:lec_start_xmit: queuing packet, ",
 375                                 dev->name);
 376                         pr_debug("MAC address %pM\n", lec_h->h_dest);
 377                         skb_queue_tail(&entry->tx_wait, skb);
 378                 } else {
 379                         pr_debug
 380                             ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
 381                              dev->name);
 382                         pr_debug("MAC address %pM\n", lec_h->h_dest);
 383                         dev->stats.tx_dropped++;
 384                         dev_kfree_skb(skb);
 385                 }
 386                 goto out;
 387         }
 388 #if DUMP_PACKETS > 0
 389         printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
 390 #endif /* DUMP_PACKETS > 0 */
 391
 392         while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
 393                 pr_debug("lec.c: emptying tx queue, ");
 394                 pr_debug("MAC address %pM\n", lec_h->h_dest);
 395                 lec_send(vcc, skb2);
 396         }
 397
 398         lec_send(vcc, skb);
 399
 400         if (!atm_may_send(vcc, 0)) {
 401                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 402
 403                 vpriv->xoff = 1;
 404                 netif_stop_queue(dev);
 405
 406                 /*
 407                  * vcc->pop() might have occurred in between, making
 408                  * the vcc usuable again.  Since xmit is serialized,
 409                  * this is the only situation we have to re-test.
 410                  */
 411
 412                 if (atm_may_send(vcc, 0))
 413                         netif_wake_queue(dev);
 414         }
 415
 416 out:
 417         if (entry)
 418                 lec_arp_put(entry);
 419         dev->trans_start = jiffies;
 420         return NETDEV_TX_OK;
 421 }
 422
 423 /* The inverse routine to net_open(). */
 424 static int lec_close(struct net_device *dev)
 425 {
 426         netif_stop_queue(dev);
 427         return 0;
 428 }
 429
 430 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 431 {
 432         unsigned long flags;
 433         struct net_device *dev = (struct net_device *)vcc->proto_data;
 434         struct lec_priv *priv = netdev_priv(dev);
 435         struct atmlec_msg *mesg;
 436         struct lec_arp_table *entry;
 437         int i;
 438         char *tmp;              /* FIXME */
 439
 440         atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 441         mesg = (struct atmlec_msg *)skb->data;
 442         tmp = skb->data;
 443         tmp += sizeof(struct atmlec_msg);
 444         pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
 445         switch (mesg->type) {
 446         case l_set_mac_addr:
 447                 for (i = 0; i < 6; i++) {
 448                         dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
 449                 }
 450                 break;
 451         case l_del_mac_addr:
 452                 for (i = 0; i < 6; i++) {
 453                         dev->dev_addr[i] = 0;
 454                 }
 455                 break;
 456         case l_addr_delete:
 457                 lec_addr_delete(priv, mesg->content.normal.atm_addr,
 458                                 mesg->content.normal.flag);
 459                 break;
 460         case l_topology_change:
 461                 priv->topology_change = mesg->content.normal.flag;
 462                 break;
 463         case l_flush_complete:
 464                 lec_flush_complete(priv, mesg->content.normal.flag);
 465                 break;
 466         case l_narp_req:        /* LANE2: see 7.1.35 in the lane2 spec */
 467                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 468                 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
 469                 lec_arp_remove(priv, entry);
 470                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 471
 472                 if (mesg->content.normal.no_source_le_narp)
 473                         break;
 474                 /* FALL THROUGH */
 475         case l_arp_update:
 476                 lec_arp_update(priv, mesg->content.normal.mac_addr,
 477                                mesg->content.normal.atm_addr,
 478                                mesg->content.normal.flag,
 479                                mesg->content.normal.targetless_le_arp);
 480                 pr_debug("lec: in l_arp_update\n");
 481                 if (mesg->sizeoftlvs != 0) {    /* LANE2 3.1.5 */
 482                         pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
 483                                 mesg->sizeoftlvs);
 484                         lane2_associate_ind(dev, mesg->content.normal.mac_addr,
 485                                             tmp, mesg->sizeoftlvs);
 486                 }
 487                 break;
 488         case l_config:
 489                 priv->maximum_unknown_frame_count =
 490                     mesg->content.config.maximum_unknown_frame_count;
 491                 priv->max_unknown_frame_time =
 492                     (mesg->content.config.max_unknown_frame_time * HZ);
 493                 priv->max_retry_count = mesg->content.config.max_retry_count;
 494                 priv->aging_time = (mesg->content.config.aging_time * HZ);
 495                 priv->forward_delay_time =
 496                     (mesg->content.config.forward_delay_time * HZ);
 497                 priv->arp_response_time =
 498                     (mesg->content.config.arp_response_time * HZ);
 499                 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
 500                 priv->path_switching_delay =
 501                     (mesg->content.config.path_switching_delay * HZ);
 502                 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
 503                 priv->lane2_ops = NULL;
 504                 if (priv->lane_version > 1)
 505                         priv->lane2_ops = &lane2_ops;
 506                 if (dev_set_mtu(dev, mesg->content.config.mtu))
 507                         printk("%s: change_mtu to %d failed\n", dev->name,
 508                                mesg->content.config.mtu);
 509                 priv->is_proxy = mesg->content.config.is_proxy;
 510                 break;
 511         case l_flush_tran_id:
 512                 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
 513                                       mesg->content.normal.flag);
 514                 break;
 515         case l_set_lecid:
 516                 priv->lecid =
 517                     (unsigned short)(0xffff & mesg->content.normal.flag);
 518                 break;
 519         case l_should_bridge:
 520 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 521                 {
 522                         pr_debug("%s: bridge zeppelin asks about %pM\n",
 523                                  dev->name, mesg->content.proxy.mac_addr);
 524
 525                         if (br_fdb_test_addr_hook == NULL)
 526                                 break;
 527
 528                         if (br_fdb_test_addr_hook(dev,
 529                                         mesg->content.proxy.mac_addr)) {
 530                                 /* hit from bridge table, send LE_ARP_RESPONSE */
 531                                 struct sk_buff *skb2;
 532                                 struct sock *sk;
 533
 534                                 pr_debug
 535                                     ("%s: entry found, responding to zeppelin\n",
 536                                      dev->name);
 537                                 skb2 =
 538                                     alloc_skb(sizeof(struct atmlec_msg),
 539                                               GFP_ATOMIC);
 540                                 if (skb2 == NULL)
 541                                         break;
 542                                 skb2->len = sizeof(struct atmlec_msg);
 543                                 skb_copy_to_linear_data(skb2, mesg,
 544                                                         sizeof(*mesg));
 545                                 atm_force_charge(priv->lecd, skb2->truesize);
 546                                 sk = sk_atm(priv->lecd);
 547                                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 548                                 sk->sk_data_ready(sk, skb2->len);
 549                         }
 550                 }
 551 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 552                 break;
 553         default:
 554                 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
 555                 dev_kfree_skb(skb);
 556                 return -EINVAL;
 557         }
 558         dev_kfree_skb(skb);
 559         return 0;
 560 }
 561
 562 static void lec_atm_close(struct atm_vcc *vcc)
 563 {
 564         struct sk_buff *skb;
 565         struct net_device *dev = (struct net_device *)vcc->proto_data;
 566         struct lec_priv *priv = netdev_priv(dev);
 567
 568         priv->lecd = NULL;
 569         /* Do something needful? */
 570
 571         netif_stop_queue(dev);
 572         lec_arp_destroy(priv);
 573
 574         if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
 575                 printk("%s lec_atm_close: closing with messages pending\n",
 576                        dev->name);
 577         while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
 578                 atm_return(vcc, skb->truesize);
 579                 dev_kfree_skb(skb);
 580         }
 581
 582         printk("%s: Shut down!\n", dev->name);
 583         module_put(THIS_MODULE);
 584 }
 585
 586 static struct atmdev_ops lecdev_ops = {
 587         .close = lec_atm_close,
 588         .send = lec_atm_send
 589 };
 590
 591 static struct atm_dev lecatm_dev = {
 592         .ops = &lecdev_ops,
 593         .type = "lec",
 594         .number = 999,          /* dummy device number */
 595         .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
 596 };
 597
 598 /*
 599  * LANE2: new argument struct sk_buff *data contains
 600  * the LE_ARP based TLVs introduced in the LANE2 spec
 601  */
 602 static int
 603 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
 604              const unsigned char *mac_addr, const unsigned char *atm_addr,
 605              struct sk_buff *data)
 606 {
 607         struct sock *sk;
 608         struct sk_buff *skb;
 609         struct atmlec_msg *mesg;
 610
 611         if (!priv || !priv->lecd) {
 612                 return -1;
 613         }
 614         skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 615         if (!skb)
 616                 return -1;
 617         skb->len = sizeof(struct atmlec_msg);
 618         mesg = (struct atmlec_msg *)skb->data;
 619         memset(mesg, 0, sizeof(struct atmlec_msg));
 620         mesg->type = type;
 621         if (data != NULL)
 622                 mesg->sizeoftlvs = data->len;
 623         if (mac_addr)
 624                 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
 625         else
 626                 mesg->content.normal.targetless_le_arp = 1;
 627         if (atm_addr)
 628                 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
 629
 630         atm_force_charge(priv->lecd, skb->truesize);
 631         sk = sk_atm(priv->lecd);
 632         skb_queue_tail(&sk->sk_receive_queue, skb);
 633         sk->sk_data_ready(sk, skb->len);
 634
 635         if (data != NULL) {
 636                 pr_debug("lec: about to send %d bytes of data\n", data->len);
 637                 atm_force_charge(priv->lecd, data->truesize);
 638                 skb_queue_tail(&sk->sk_receive_queue, data);
 639                 sk->sk_data_ready(sk, skb->len);
 640         }
 641
 642         return 0;
 643 }
 644
 645 /* shamelessly stolen from drivers/net/net_init.c */
 646 static int lec_change_mtu(struct net_device *dev, int new_mtu)
 647 {
 648         if ((new_mtu < 68) || (new_mtu > 18190))
 649                 return -EINVAL;
 650         dev->mtu = new_mtu;
 651         return 0;
 652 }
 653
 654 static void lec_set_multicast_list(struct net_device *dev)
 655 {
 656         /*
 657          * by default, all multicast frames arrive over the bus.
 658          * eventually support selective multicast service
 659          */
 660         return;
 661 }
 662
 663 static const struct net_device_ops lec_netdev_ops = {
 664         .ndo_open               = lec_open,
 665         .ndo_stop               = lec_close,
 666         .ndo_start_xmit         = lec_start_xmit,
 667         .ndo_change_mtu         = lec_change_mtu,
 668         .ndo_tx_timeout         = lec_tx_timeout,
 669         .ndo_set_multicast_list = lec_set_multicast_list,
 670 };
 671
 672 static const unsigned char lec_ctrl_magic[] = {
 673         0xff,
 674         0x00,
 675         0x01,
 676         0x01
 677 };
 678
 679 #define LEC_DATA_DIRECT_8023  2
 680 #define LEC_DATA_DIRECT_8025  3
 681
 682 static int lec_is_data_direct(struct atm_vcc *vcc)
 683 {
 684         return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
 685                 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
 686 }
 687
 688 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
 689 {
 690         unsigned long flags;
 691         struct net_device *dev = (struct net_device *)vcc->proto_data;
 692         struct lec_priv *priv = netdev_priv(dev);
 693
 694 #if DUMP_PACKETS >0
 695         int i = 0;
 696         char buf[300];
 697
 698         printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
 699                vcc->vpi, vcc->vci);
 700 #endif
 701         if (!skb) {
 702                 pr_debug("%s: null skb\n", dev->name);
 703                 lec_vcc_close(priv, vcc);
 704                 return;
 705         }
 706 #if DUMP_PACKETS > 0
 707         printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
 708                skb->len, priv->lecid);
 709 #if DUMP_PACKETS >= 2
 710         for (i = 0; i < skb->len && i < 99; i++) {
 711                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 712         }
 713 #elif DUMP_PACKETS >= 1
 714         for (i = 0; i < skb->len && i < 30; i++) {
 715                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 716         }
 717 #endif /* DUMP_PACKETS >= 1 */
 718         if (i == skb->len)
 719                 printk("%s\n", buf);
 720         else
 721                 printk("%s...\n", buf);
 722 #endif /* DUMP_PACKETS > 0 */
 723         if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {        /* Control frame, to daemon */
 724                 struct sock *sk = sk_atm(vcc);
 725
 726                 pr_debug("%s: To daemon\n", dev->name);
 727                 skb_queue_tail(&sk->sk_receive_queue, skb);
 728                 sk->sk_data_ready(sk, skb->len);
 729         } else {                /* Data frame, queue to protocol handlers */
 730                 struct lec_arp_table *entry;
 731                 unsigned char *src, *dst;
 732
 733                 atm_return(vcc, skb->truesize);
 734                 if (*(__be16 *) skb->data == htons(priv->lecid) ||
 735                     !priv->lecd || !(dev->flags & IFF_UP)) {
 736                         /*
 737                          * Probably looping back, or if lecd is missing,
 738                          * lecd has gone down
 739                          */
 740                         pr_debug("Ignoring frame...\n");
 741                         dev_kfree_skb(skb);
 742                         return;
 743                 }
 744 #ifdef CONFIG_TR
 745                 if (priv->is_trdev)
 746                         dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
 747                 else
 748 #endif
 749                         dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
 750
 751                 /*
 752                  * If this is a Data Direct VCC, and the VCC does not match
 753                  * the LE_ARP cache entry, delete the LE_ARP cache entry.
 754                  */
 755                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 756                 if (lec_is_data_direct(vcc)) {
 757 #ifdef CONFIG_TR
 758                         if (priv->is_trdev)
 759                                 src =
 760                                     ((struct lecdatahdr_8025 *)skb->data)->
 761                                     h_source;
 762                         else
 763 #endif
 764                                 src =
 765                                     ((struct lecdatahdr_8023 *)skb->data)->
 766                                     h_source;
 767                         entry = lec_arp_find(priv, src);
 768                         if (entry && entry->vcc != vcc) {
 769                                 lec_arp_remove(priv, entry);
 770                                 lec_arp_put(entry);
 771                         }
 772                 }
 773                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 774
 775                 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
 776                     !priv->is_proxy &&  /* Proxy wants all the packets */
 777                     memcmp(dst, dev->dev_addr, dev->addr_len)) {
 778                         dev_kfree_skb(skb);
 779                         return;
 780                 }
 781                 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
 782                         lec_arp_check_empties(priv, vcc, skb);
 783                 }
 784                 skb_pull(skb, 2);       /* skip lec_id */
 785 #ifdef CONFIG_TR
 786                 if (priv->is_trdev)
 787                         skb->protocol = tr_type_trans(skb, dev);
 788                 else
 789 #endif
 790                         skb->protocol = eth_type_trans(skb, dev);
 791                 dev->stats.rx_packets++;
 792                 dev->stats.rx_bytes += skb->len;
 793                 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
 794                 netif_rx(skb);
 795         }
 796 }
 797
 798 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 799 {
 800         struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 801         struct net_device *dev = skb->dev;
 802
 803         if (vpriv == NULL) {
 804                 printk("lec_pop(): vpriv = NULL!?!?!?\n");
 805                 return;
 806         }
 807
 808         vpriv->old_pop(vcc, skb);
 809
 810         if (vpriv->xoff && atm_may_send(vcc, 0)) {
 811                 vpriv->xoff = 0;
 812                 if (netif_running(dev) && netif_queue_stopped(dev))
 813                         netif_wake_queue(dev);
 814         }
 815 }
 816
 817 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
 818 {
 819         struct lec_vcc_priv *vpriv;
 820         int bytes_left;
 821         struct atmlec_ioc ioc_data;
 822
 823         /* Lecd must be up in this case */
 824         bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
 825         if (bytes_left != 0) {
 826                 printk
 827                     ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
 828                      bytes_left);
 829         }
 830         if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
 831             !dev_lec[ioc_data.dev_num])
 832                 return -EINVAL;
 833         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
 834                 return -ENOMEM;
 835         vpriv->xoff = 0;
 836         vpriv->old_pop = vcc->pop;
 837         vcc->user_back = vpriv;
 838         vcc->pop = lec_pop;
 839         lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
 840                       &ioc_data, vcc, vcc->push);
 841         vcc->proto_data = dev_lec[ioc_data.dev_num];
 842         vcc->push = lec_push;
 843         return 0;
 844 }
 845
 846 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
 847 {
 848         if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
 849                 return -EINVAL;
 850         vcc->proto_data = dev_lec[arg];
 851         return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]),
 852                                 vcc);
 853 }
 854
 855 /* Initialize device. */
 856 static int lecd_attach(struct atm_vcc *vcc, int arg)
 857 {
 858         int i;
 859         struct lec_priv *priv;
 860
 861         if (arg < 0)
 862                 i = 0;
 863         else
 864                 i = arg;
 865 #ifdef CONFIG_TR
 866         if (arg >= MAX_LEC_ITF)
 867                 return -EINVAL;
 868 #else                           /* Reserve the top NUM_TR_DEVS for TR */
 869         if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
 870                 return -EINVAL;
 871 #endif
 872         if (!dev_lec[i]) {
 873                 int is_trdev, size;
 874
 875                 is_trdev = 0;
 876                 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
 877                         is_trdev = 1;
 878
 879                 size = sizeof(struct lec_priv);
 880 #ifdef CONFIG_TR
 881                 if (is_trdev)
 882                         dev_lec[i] = alloc_trdev(size);
 883                 else
 884 #endif
 885                         dev_lec[i] = alloc_etherdev(size);
 886                 if (!dev_lec[i])
 887                         return -ENOMEM;
 888                 dev_lec[i]->netdev_ops = &lec_netdev_ops;
 889                 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
 890                 if (register_netdev(dev_lec[i])) {
 891                         free_netdev(dev_lec[i]);
 892                         return -EINVAL;
 893                 }
 894
 895                 priv = netdev_priv(dev_lec[i]);
 896                 priv->is_trdev = is_trdev;
 897         } else {
 898                 priv = netdev_priv(dev_lec[i]);
 899                 if (priv->lecd)
 900                         return -EADDRINUSE;
 901         }
 902         lec_arp_init(priv);
 903         priv->itfnum = i;       /* LANE2 addition */
 904         priv->lecd = vcc;
 905         vcc->dev = &lecatm_dev;
 906         vcc_insert_socket(sk_atm(vcc));
 907
 908         vcc->proto_data = dev_lec[i];
 909         set_bit(ATM_VF_META, &vcc->flags);
 910         set_bit(ATM_VF_READY, &vcc->flags);
 911
 912         /* Set default values to these variables */
 913         priv->maximum_unknown_frame_count = 1;
 914         priv->max_unknown_frame_time = (1 * HZ);
 915         priv->vcc_timeout_period = (1200 * HZ);
 916         priv->max_retry_count = 1;
 917         priv->aging_time = (300 * HZ);
 918         priv->forward_delay_time = (15 * HZ);
 919         priv->topology_change = 0;
 920         priv->arp_response_time = (1 * HZ);
 921         priv->flush_timeout = (4 * HZ);
 922         priv->path_switching_delay = (6 * HZ);
 923
 924         if (dev_lec[i]->flags & IFF_UP) {
 925                 netif_start_queue(dev_lec[i]);
 926         }
 927         __module_get(THIS_MODULE);
 928         return i;
 929 }
 930
 931 #ifdef CONFIG_PROC_FS
 932 static const char *lec_arp_get_status_string(unsigned char status)
 933 {
 934         static const char *const lec_arp_status_string[] = {
 935                 "ESI_UNKNOWN       ",
 936                 "ESI_ARP_PENDING   ",
 937                 "ESI_VC_PENDING    ",
 938                 "<Undefined>       ",
 939                 "ESI_FLUSH_PENDING ",
 940                 "ESI_FORWARD_DIRECT"
 941         };
 942
 943         if (status > ESI_FORWARD_DIRECT)
 944                 status = 3;     /* ESI_UNDEFINED */
 945         return lec_arp_status_string[status];
 946 }
 947
 948 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
 949 {
 950         int i;
 951
 952         for (i = 0; i < ETH_ALEN; i++)
 953                 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
 954         seq_printf(seq, " ");
 955         for (i = 0; i < ATM_ESA_LEN; i++)
 956                 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
 957         seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
 958                    entry->flags & 0xffff);
 959         if (entry->vcc)
 960                 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
 961         else
 962                 seq_printf(seq, "        ");
 963         if (entry->recv_vcc) {
 964                 seq_printf(seq, "     %3d %3d", entry->recv_vcc->vpi,
 965                            entry->recv_vcc->vci);
 966         }
 967         seq_putc(seq, '\n');
 968 }
 969
 970 struct lec_state {
 971         unsigned long flags;
 972         struct lec_priv *locked;
 973         struct hlist_node *node;
 974         struct net_device *dev;
 975         int itf;
 976         int arp_table;
 977         int misc_table;
 978 };
 979
 980 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
 981                           loff_t *l)
 982 {
 983         struct hlist_node *e = state->node;
 984         struct lec_arp_table *tmp;
 985
 986         if (!e)
 987                 e = tbl->first;
 988         if (e == SEQ_START_TOKEN) {
 989                 e = tbl->first;
 990                 --*l;
 991         }
 992
 993         hlist_for_each_entry_from(tmp, e, next) {
 994                 if (--*l < 0)
 995                         break;
 996         }
 997         state->node = e;
 998
 999         return (*l < 0) ? state : NULL;
1000 }
1001
1002 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1003                           struct lec_priv *priv)
1004 {
1005         void *v = NULL;
1006         int p;
1007
1008         for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1009                 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1010                 if (v)
1011                         break;
1012         }
1013         state->arp_table = p;
1014         return v;
1015 }
1016
1017 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1018                            struct lec_priv *priv)
1019 {
1020         struct hlist_head *lec_misc_tables[] = {
1021                 &priv->lec_arp_empty_ones,
1022                 &priv->lec_no_forward,
1023                 &priv->mcast_fwds
1024         };
1025         void *v = NULL;
1026         int q;
1027
1028         for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1029                 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1030                 if (v)
1031                         break;
1032         }
1033         state->misc_table = q;
1034         return v;
1035 }
1036
1037 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1038                            struct lec_priv *priv)
1039 {
1040         if (!state->locked) {
1041                 state->locked = priv;
1042                 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1043         }
1044         if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1045                 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1046                 state->locked = NULL;
1047                 /* Partial state reset for the next time we get called */
1048                 state->arp_table = state->misc_table = 0;
1049         }
1050         return state->locked;
1051 }
1052
1053 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1054 {
1055         struct net_device *dev;
1056         void *v;
1057
1058         dev = state->dev ? state->dev : dev_lec[state->itf];
1059         v = (dev && netdev_priv(dev)) ?
1060                 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
1061         if (!v && dev) {
1062                 dev_put(dev);
1063                 /* Partial state reset for the next time we get called */
1064                 dev = NULL;
1065         }
1066         state->dev = dev;
1067         return v;
1068 }
1069
1070 static void *lec_get_idx(struct lec_state *state, loff_t l)
1071 {
1072         void *v = NULL;
1073
1074         for (; state->itf < MAX_LEC_ITF; state->itf++) {
1075                 v = lec_itf_walk(state, &l);
1076                 if (v)
1077                         break;
1078         }
1079         return v;
1080 }
1081
1082 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1083 {
1084         struct lec_state *state = seq->private;
1085
1086         state->itf = 0;
1087         state->dev = NULL;
1088         state->locked = NULL;
1089         state->arp_table = 0;
1090         state->misc_table = 0;
1091         state->node = SEQ_START_TOKEN;
1092
1093         return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
1094 }
1095
1096 static void lec_seq_stop(struct seq_file *seq, void *v)
1097 {
1098         struct lec_state *state = seq->private;
1099
1100         if (state->dev) {
1101                 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1102                                        state->flags);
1103                 dev_put(state->dev);
1104         }
1105 }
1106
1107 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1108 {
1109         struct lec_state *state = seq->private;
1110
1111         v = lec_get_idx(state, 1);
1112         *pos += !!PTR_ERR(v);
1113         return v;
1114 }
1115
1116 static int lec_seq_show(struct seq_file *seq, void *v)
1117 {
1118         static const char lec_banner[] =
1119             "Itf  MAC          ATM destination"
1120             "                          Status            Flags "
1121             "VPI/VCI Recv VPI/VCI\n";
1122
1123         if (v == SEQ_START_TOKEN)
1124                 seq_puts(seq, lec_banner);
1125         else {
1126                 struct lec_state *state = seq->private;
1127                 struct net_device *dev = state->dev;
1128                 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1129
1130                 seq_printf(seq, "%s ", dev->name);
1131                 lec_info(seq, entry);
1132         }
1133         return 0;
1134 }
1135
1136 static const struct seq_operations lec_seq_ops = {
1137         .start = lec_seq_start,
1138         .next = lec_seq_next,
1139         .stop = lec_seq_stop,
1140         .show = lec_seq_show,
1141 };
1142
1143 static int lec_seq_open(struct inode *inode, struct file *file)
1144 {
1145         return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1146 }
1147
1148 static const struct file_operations lec_seq_fops = {
1149         .owner = THIS_MODULE,
1150         .open = lec_seq_open,
1151         .read = seq_read,
1152         .llseek = seq_lseek,
1153         .release = seq_release_private,
1154 };
1155 #endif
1156
1157 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1158 {
1159         struct atm_vcc *vcc = ATM_SD(sock);
1160         int err = 0;
1161
1162         switch (cmd) {
1163         case ATMLEC_CTRL:
1164         case ATMLEC_MCAST:
1165         case ATMLEC_DATA:
1166                 if (!capable(CAP_NET_ADMIN))
1167                         return -EPERM;
1168                 break;
1169         default:
1170                 return -ENOIOCTLCMD;
1171         }
1172
1173         switch (cmd) {
1174         case ATMLEC_CTRL:
1175                 err = lecd_attach(vcc, (int)arg);
1176                 if (err >= 0)
1177                         sock->state = SS_CONNECTED;
1178                 break;
1179         case ATMLEC_MCAST:
1180                 err = lec_mcast_attach(vcc, (int)arg);
1181                 break;
1182         case ATMLEC_DATA:
1183                 err = lec_vcc_attach(vcc, (void __user *)arg);
1184                 break;
1185         }
1186
1187         return err;
1188 }
1189
1190 static struct atm_ioctl lane_ioctl_ops = {
1191         .owner = THIS_MODULE,
1192         .ioctl = lane_ioctl,
1193 };
1194
1195 static int __init lane_module_init(void)
1196 {
1197 #ifdef CONFIG_PROC_FS
1198         struct proc_dir_entry *p;
1199
1200         p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1201         if (!p) {
1202                 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n");
1203                 return -ENOMEM;
1204         }
1205 #endif
1206
1207         register_atm_ioctl(&lane_ioctl_ops);
1208         printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1209         return 0;
1210 }
1211
1212 static void __exit lane_module_cleanup(void)
1213 {
1214         int i;
1215         struct lec_priv *priv;
1216
1217         remove_proc_entry("lec", atm_proc_root);
1218
1219         deregister_atm_ioctl(&lane_ioctl_ops);
1220
1221         for (i = 0; i < MAX_LEC_ITF; i++) {
1222                 if (dev_lec[i] != NULL) {
1223                         priv = netdev_priv(dev_lec[i]);
1224                         unregister_netdev(dev_lec[i]);
1225                         free_netdev(dev_lec[i]);
1226                         dev_lec[i] = NULL;
1227                 }
1228         }
1229
1230         return;
1231 }
1232
1233 module_init(lane_module_init);
1234 module_exit(lane_module_cleanup);
1235
1236 /*
1237  * LANE2: 3.1.3, LE_RESOLVE.request
1238  * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1239  * If sizeoftlvs == NULL the default TLVs associated with with this
1240  * lec will be used.
1241  * If dst_mac == NULL, targetless LE_ARP will be sent
1242  */
1243 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1244                          u8 **tlvs, u32 *sizeoftlvs)
1245 {
1246         unsigned long flags;
1247         struct lec_priv *priv = netdev_priv(dev);
1248         struct lec_arp_table *table;
1249         struct sk_buff *skb;
1250         int retval;
1251
1252         if (force == 0) {
1253                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1254                 table = lec_arp_find(priv, dst_mac);
1255                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1256                 if (table == NULL)
1257                         return -1;
1258
1259                 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1260                 if (*tlvs == NULL)
1261                         return -1;
1262
1263                 *sizeoftlvs = table->sizeoftlvs;
1264
1265                 return 0;
1266         }
1267
1268         if (sizeoftlvs == NULL)
1269                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1270
1271         else {
1272                 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1273                 if (skb == NULL)
1274                         return -1;
1275                 skb->len = *sizeoftlvs;
1276                 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1277                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1278         }
1279         return retval;
1280 }
1281
1282 /*
1283  * LANE2: 3.1.4, LE_ASSOCIATE.request
1284  * Associate the *tlvs with the *lan_dst address.
1285  * Will overwrite any previous association
1286  * Returns 1 for success, 0 for failure (out of memory)
1287  *
1288  */
1289 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1290                                const u8 *tlvs, u32 sizeoftlvs)
1291 {
1292         int retval;
1293         struct sk_buff *skb;
1294         struct lec_priv *priv = netdev_priv(dev);
1295
1296         if (compare_ether_addr(lan_dst, dev->dev_addr))
1297                 return (0);     /* not our mac address */
1298
1299         kfree(priv->tlvs);      /* NULL if there was no previous association */
1300
1301         priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1302         if (priv->tlvs == NULL)
1303                 return (0);
1304         priv->sizeoftlvs = sizeoftlvs;
1305
1306         skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1307         if (skb == NULL)
1308                 return 0;
1309         skb->len = sizeoftlvs;
1310         skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1311         retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1312         if (retval != 0)
1313                 printk("lec.c: lane2_associate_req() failed\n");
1314         /*
1315          * If the previous association has changed we must
1316          * somehow notify other LANE entities about the change
1317          */
1318         return (1);
1319 }
1320
1321 /*
1322  * LANE2: 3.1.5, LE_ASSOCIATE.indication
1323  *
1324  */
1325 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1326                                 const u8 *tlvs, u32 sizeoftlvs)
1327 {
1328 #if 0
1329         int i = 0;
1330 #endif
1331         struct lec_priv *priv = netdev_priv(dev);
1332 #if 0                           /*
1333                                  * Why have the TLVs in LE_ARP entries
1334                                  * since we do not use them? When you
1335                                  * uncomment this code, make sure the
1336                                  * TLVs get freed when entry is killed
1337                                  */
1338         struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1339
1340         if (entry == NULL)
1341                 return;         /* should not happen */
1342
1343         kfree(entry->tlvs);
1344
1345         entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1346         if (entry->tlvs == NULL)
1347                 return;
1348         entry->sizeoftlvs = sizeoftlvs;
1349 #endif
1350 #if 0
1351         printk("lec.c: lane2_associate_ind()\n");
1352         printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1353         while (i < sizeoftlvs)
1354                 printk("%02x ", tlvs[i++]);
1355
1356         printk("\n");
1357 #endif
1358
1359         /* tell MPOA about the TLVs we saw */
1360         if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1361                 priv->lane2_ops->associate_indicator(dev, mac_addr,
1362                                                      tlvs, sizeoftlvs);
1363         }
1364         return;
1365 }
1366
1367 /*
1368  * Here starts what used to lec_arpc.c
1369  *
1370  * lec_arpc.c was added here when making
1371  * lane client modular. October 1997
1372  */
1373
1374 #include <linux/types.h>
1375 #include <linux/timer.h>
1376 #include <asm/param.h>
1377 #include <asm/atomic.h>
1378 #include <linux/inetdevice.h>
1379 #include <net/route.h>
1380
1381 #if 0
1382 #define pr_debug(format,args...)
1383 /*
1384 #define pr_debug printk
1385 */
1386 #endif
1387 #define DEBUG_ARP_TABLE 0
1388
1389 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1390
1391 static void lec_arp_check_expire(struct work_struct *work);
1392 static void lec_arp_expire_arp(unsigned long data);
1393
1394 /*
1395  * Arp table funcs
1396  */
1397
1398 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1399
1400 /*
1401  * Initialization of arp-cache
1402  */
1403 static void lec_arp_init(struct lec_priv *priv)
1404 {
1405         unsigned short i;
1406
1407         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1408                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1409         }
1410         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1411         INIT_HLIST_HEAD(&priv->lec_no_forward);
1412         INIT_HLIST_HEAD(&priv->mcast_fwds);
1413         spin_lock_init(&priv->lec_arp_lock);
1414         INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1415         schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1416 }
1417
1418 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1419 {
1420         if (entry->vcc) {
1421                 struct atm_vcc *vcc = entry->vcc;
1422                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1423                 struct net_device *dev = (struct net_device *)vcc->proto_data;
1424
1425                 vcc->pop = vpriv->old_pop;
1426                 if (vpriv->xoff)
1427                         netif_wake_queue(dev);
1428                 kfree(vpriv);
1429                 vcc->user_back = NULL;
1430                 vcc->push = entry->old_push;
1431                 vcc_release_async(vcc, -EPIPE);
1432                 entry->vcc = NULL;
1433         }
1434         if (entry->recv_vcc) {
1435                 entry->recv_vcc->push = entry->old_recv_push;
1436                 vcc_release_async(entry->recv_vcc, -EPIPE);
1437                 entry->recv_vcc = NULL;
1438         }
1439 }
1440
1441 /*
1442  * Insert entry to lec_arp_table
1443  * LANE2: Add to the end of the list to satisfy 8.1.13
1444  */
1445 static inline void
1446 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1447 {
1448         struct hlist_head *tmp;
1449
1450         tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1451         hlist_add_head(&entry->next, tmp);
1452
1453         pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1454                 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1455                 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1456                 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1457 }
1458
1459 /*
1460  * Remove entry from lec_arp_table
1461  */
1462 static int
1463 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1464 {
1465         struct hlist_node *node;
1466         struct lec_arp_table *entry;
1467         int i, remove_vcc = 1;
1468
1469         if (!to_remove) {
1470                 return -1;
1471         }
1472
1473         hlist_del(&to_remove->next);
1474         del_timer(&to_remove->timer);
1475
1476         /* If this is the only MAC connected to this VCC, also tear down the VCC */
1477         if (to_remove->status >= ESI_FLUSH_PENDING) {
1478                 /*
1479                  * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1480                  */
1481                 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1482                         hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1483                                 if (memcmp(to_remove->atm_addr,
1484                                            entry->atm_addr, ATM_ESA_LEN) == 0) {
1485                                         remove_vcc = 0;
1486                                         break;
1487                                 }
1488                         }
1489                 }
1490                 if (remove_vcc)
1491                         lec_arp_clear_vccs(to_remove);
1492         }
1493         skb_queue_purge(&to_remove->tx_wait);   /* FIXME: good place for this? */
1494
1495         pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1496                 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1497                 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1498                 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1499         return 0;
1500 }
1501
1502 #if DEBUG_ARP_TABLE
1503 static const char *get_status_string(unsigned char st)
1504 {
1505         switch (st) {
1506         case ESI_UNKNOWN:
1507                 return "ESI_UNKNOWN";
1508         case ESI_ARP_PENDING:
1509                 return "ESI_ARP_PENDING";
1510         case ESI_VC_PENDING:
1511                 return "ESI_VC_PENDING";
1512         case ESI_FLUSH_PENDING:
1513                 return "ESI_FLUSH_PENDING";
1514         case ESI_FORWARD_DIRECT:
1515                 return "ESI_FORWARD_DIRECT";
1516         default:
1517                 return "<UNKNOWN>";
1518         }
1519 }
1520
1521 static void dump_arp_table(struct lec_priv *priv)
1522 {
1523         struct hlist_node *node;
1524         struct lec_arp_table *rulla;
1525         char buf[256];
1526         int i, j, offset;
1527
1528         printk("Dump %p:\n", priv);
1529         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1530                 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1531                         offset = 0;
1532                         offset += sprintf(buf, "%d: %p\n", i, rulla);
1533                         offset += sprintf(buf + offset, "Mac:");
1534                         for (j = 0; j < ETH_ALEN; j++) {
1535                                 offset += sprintf(buf + offset,
1536                                                   "%2.2x ",
1537                                                   rulla->mac_addr[j] & 0xff);
1538                         }
1539                         offset += sprintf(buf + offset, "Atm:");
1540                         for (j = 0; j < ATM_ESA_LEN; j++) {
1541                                 offset += sprintf(buf + offset,
1542                                                   "%2.2x ",
1543                                                   rulla->atm_addr[j] & 0xff);
1544                         }
1545                         offset += sprintf(buf + offset,
1546                                           "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1547                                           rulla->vcc ? rulla->vcc->vpi : 0,
1548                                           rulla->vcc ? rulla->vcc->vci : 0,
1549                                           rulla->recv_vcc ? rulla->recv_vcc->
1550                                           vpi : 0,
1551                                           rulla->recv_vcc ? rulla->recv_vcc->
1552                                           vci : 0, rulla->last_used,
1553                                           rulla->timestamp, rulla->no_tries);
1554                         offset +=
1555                             sprintf(buf + offset,
1556                                     "Flags:%x, Packets_flooded:%x, Status: %s ",
1557                                     rulla->flags, rulla->packets_flooded,
1558                                     get_status_string(rulla->status));
1559                         printk("%s\n", buf);
1560                 }
1561         }
1562
1563         if (!hlist_empty(&priv->lec_no_forward))
1564                 printk("No forward\n");
1565         hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1566                 offset = 0;
1567                 offset += sprintf(buf + offset, "Mac:");
1568                 for (j = 0; j < ETH_ALEN; j++) {
1569                         offset += sprintf(buf + offset, "%2.2x ",
1570                                           rulla->mac_addr[j] & 0xff);
1571                 }
1572                 offset += sprintf(buf + offset, "Atm:");
1573                 for (j = 0; j < ATM_ESA_LEN; j++) {
1574                         offset += sprintf(buf + offset, "%2.2x ",
1575                                           rulla->atm_addr[j] & 0xff);
1576                 }
1577                 offset += sprintf(buf + offset,
1578                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1579                                   rulla->vcc ? rulla->vcc->vpi : 0,
1580                                   rulla->vcc ? rulla->vcc->vci : 0,
1581                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1582                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1583                                   rulla->last_used,
1584                                   rulla->timestamp, rulla->no_tries);
1585                 offset += sprintf(buf + offset,
1586                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1587                                   rulla->flags, rulla->packets_flooded,
1588                                   get_status_string(rulla->status));
1589                 printk("%s\n", buf);
1590         }
1591
1592         if (!hlist_empty(&priv->lec_arp_empty_ones))
1593                 printk("Empty ones\n");
1594         hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1595                 offset = 0;
1596                 offset += sprintf(buf + offset, "Mac:");
1597                 for (j = 0; j < ETH_ALEN; j++) {
1598                         offset += sprintf(buf + offset, "%2.2x ",
1599                                           rulla->mac_addr[j] & 0xff);
1600                 }
1601                 offset += sprintf(buf + offset, "Atm:");
1602                 for (j = 0; j < ATM_ESA_LEN; j++) {
1603                         offset += sprintf(buf + offset, "%2.2x ",
1604                                           rulla->atm_addr[j] & 0xff);
1605                 }
1606                 offset += sprintf(buf + offset,
1607                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1608                                   rulla->vcc ? rulla->vcc->vpi : 0,
1609                                   rulla->vcc ? rulla->vcc->vci : 0,
1610                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1611                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1612                                   rulla->last_used,
1613                                   rulla->timestamp, rulla->no_tries);
1614                 offset += sprintf(buf + offset,
1615                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1616                                   rulla->flags, rulla->packets_flooded,
1617                                   get_status_string(rulla->status));
1618                 printk("%s", buf);
1619         }
1620
1621         if (!hlist_empty(&priv->mcast_fwds))
1622                 printk("Multicast Forward VCCs\n");
1623         hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1624                 offset = 0;
1625                 offset += sprintf(buf + offset, "Mac:");
1626                 for (j = 0; j < ETH_ALEN; j++) {
1627                         offset += sprintf(buf + offset, "%2.2x ",
1628                                           rulla->mac_addr[j] & 0xff);
1629                 }
1630                 offset += sprintf(buf + offset, "Atm:");
1631                 for (j = 0; j < ATM_ESA_LEN; j++) {
1632                         offset += sprintf(buf + offset, "%2.2x ",
1633                                           rulla->atm_addr[j] & 0xff);
1634                 }
1635                 offset += sprintf(buf + offset,
1636                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1637                                   rulla->vcc ? rulla->vcc->vpi : 0,
1638                                   rulla->vcc ? rulla->vcc->vci : 0,
1639                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1640                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1641                                   rulla->last_used,
1642                                   rulla->timestamp, rulla->no_tries);
1643                 offset += sprintf(buf + offset,
1644                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1645                                   rulla->flags, rulla->packets_flooded,
1646                                   get_status_string(rulla->status));
1647                 printk("%s\n", buf);
1648         }
1649
1650 }
1651 #else
1652 #define dump_arp_table(priv) do { } while (0)
1653 #endif
1654
1655 /*
1656  * Destruction of arp-cache
1657  */
1658 static void lec_arp_destroy(struct lec_priv *priv)
1659 {
1660         unsigned long flags;
1661         struct hlist_node *node, *next;
1662         struct lec_arp_table *entry;
1663         int i;
1664
1665         cancel_rearming_delayed_work(&priv->lec_arp_work);
1666
1667         /*
1668          * Remove all entries
1669          */
1670
1671         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1672         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1673                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1674                         lec_arp_remove(priv, entry);
1675                         lec_arp_put(entry);
1676                 }
1677                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1678         }
1679
1680         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1681                 del_timer_sync(&entry->timer);
1682                 lec_arp_clear_vccs(entry);
1683                 hlist_del(&entry->next);
1684                 lec_arp_put(entry);
1685         }
1686         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1687
1688         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1689                 del_timer_sync(&entry->timer);
1690                 lec_arp_clear_vccs(entry);
1691                 hlist_del(&entry->next);
1692                 lec_arp_put(entry);
1693         }
1694         INIT_HLIST_HEAD(&priv->lec_no_forward);
1695
1696         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1697                 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1698                 lec_arp_clear_vccs(entry);
1699                 hlist_del(&entry->next);
1700                 lec_arp_put(entry);
1701         }
1702         INIT_HLIST_HEAD(&priv->mcast_fwds);
1703         priv->mcast_vcc = NULL;
1704         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1705 }
1706
1707 /*
1708  * Find entry by mac_address
1709  */
1710 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1711                                           const unsigned char *mac_addr)
1712 {
1713         struct hlist_node *node;
1714         struct hlist_head *head;
1715         struct lec_arp_table *entry;
1716
1717         pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1718                 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1719                 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1720
1721         head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1722         hlist_for_each_entry(entry, node, head, next) {
1723                 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1724                         return entry;
1725                 }
1726         }
1727         return NULL;
1728 }
1729
1730 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1731                                         const unsigned char *mac_addr)
1732 {
1733         struct lec_arp_table *to_return;
1734
1735         to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1736         if (!to_return) {
1737                 printk("LEC: Arp entry kmalloc failed\n");
1738                 return NULL;
1739         }
1740         memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1741         INIT_HLIST_NODE(&to_return->next);
1742         setup_timer(&to_return->timer, lec_arp_expire_arp,
1743                         (unsigned long)to_return);
1744         to_return->last_used = jiffies;
1745         to_return->priv = priv;
1746         skb_queue_head_init(&to_return->tx_wait);
1747         atomic_set(&to_return->usage, 1);
1748         return to_return;
1749 }
1750
1751 /* Arp sent timer expired */
1752 static void lec_arp_expire_arp(unsigned long data)
1753 {
1754         struct lec_arp_table *entry;
1755
1756         entry = (struct lec_arp_table *)data;
1757
1758         pr_debug("lec_arp_expire_arp\n");
1759         if (entry->status == ESI_ARP_PENDING) {
1760                 if (entry->no_tries <= entry->priv->max_retry_count) {
1761                         if (entry->is_rdesc)
1762                                 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1763                                              entry->mac_addr, NULL, NULL);
1764                         else
1765                                 send_to_lecd(entry->priv, l_arp_xmt,
1766                                              entry->mac_addr, NULL, NULL);
1767                         entry->no_tries++;
1768                 }
1769                 mod_timer(&entry->timer, jiffies + (1 * HZ));
1770         }
1771 }
1772
1773 /* Unknown/unused vcc expire, remove associated entry */
1774 static void lec_arp_expire_vcc(unsigned long data)
1775 {
1776         unsigned long flags;
1777         struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1778         struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1779
1780         del_timer(&to_remove->timer);
1781
1782         pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1783                 to_remove, priv,
1784                 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1785                 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1786
1787         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1788         hlist_del(&to_remove->next);
1789         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1790
1791         lec_arp_clear_vccs(to_remove);
1792         lec_arp_put(to_remove);
1793 }
1794
1795 /*
1796  * Expire entries.
1797  * 1. Re-set timer
1798  * 2. For each entry, delete entries that have aged past the age limit.
1799  * 3. For each entry, depending on the status of the entry, perform
1800  *    the following maintenance.
1801  *    a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1802  *       tick_count is above the max_unknown_frame_time, clear
1803  *       the tick_count to zero and clear the packets_flooded counter
1804  *       to zero. This supports the packet rate limit per address
1805  *       while flooding unknowns.
1806  *    b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1807  *       than or equal to the path_switching_delay, change the status
1808  *       to ESI_FORWARD_DIRECT. This causes the flush period to end
1809  *       regardless of the progress of the flush protocol.
1810  */
1811 static void lec_arp_check_expire(struct work_struct *work)
1812 {
1813         unsigned long flags;
1814         struct lec_priv *priv =
1815                 container_of(work, struct lec_priv, lec_arp_work.work);
1816         struct hlist_node *node, *next;
1817         struct lec_arp_table *entry;
1818         unsigned long now;
1819         unsigned long time_to_check;
1820         int i;
1821
1822         pr_debug("lec_arp_check_expire %p\n", priv);
1823         now = jiffies;
1824 restart:
1825         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1826         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1827                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1828                         if ((entry->flags) & LEC_REMOTE_FLAG &&
1829                             priv->topology_change)
1830                                 time_to_check = priv->forward_delay_time;
1831                         else
1832                                 time_to_check = priv->aging_time;
1833
1834                         pr_debug("About to expire: %lx - %lx > %lx\n",
1835                                 now, entry->last_used, time_to_check);
1836                         if (time_after(now, entry->last_used + time_to_check)
1837                             && !(entry->flags & LEC_PERMANENT_FLAG)
1838                             && !(entry->mac_addr[0] & 0x01)) {  /* LANE2: 7.1.20 */
1839                                 /* Remove entry */
1840                                 pr_debug("LEC:Entry timed out\n");
1841                                 lec_arp_remove(priv, entry);
1842                                 lec_arp_put(entry);
1843                         } else {
1844                                 /* Something else */
1845                                 if ((entry->status == ESI_VC_PENDING ||
1846                                      entry->status == ESI_ARP_PENDING)
1847                                     && time_after_eq(now,
1848                                                      entry->timestamp +
1849                                                      priv->
1850                                                      max_unknown_frame_time)) {
1851                                         entry->timestamp = jiffies;
1852                                         entry->packets_flooded = 0;
1853                                         if (entry->status == ESI_VC_PENDING)
1854                                                 send_to_lecd(priv, l_svc_setup,
1855                                                              entry->mac_addr,
1856                                                              entry->atm_addr,
1857                                                              NULL);
1858                                 }
1859                                 if (entry->status == ESI_FLUSH_PENDING
1860                                     &&
1861                                     time_after_eq(now, entry->timestamp +
1862                                                   priv->path_switching_delay)) {
1863                                         struct sk_buff *skb;
1864                                         struct atm_vcc *vcc = entry->vcc;
1865
1866                                         lec_arp_hold(entry);
1867                                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1868                                         while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1869                                                 lec_send(vcc, skb);
1870                                         entry->last_used = jiffies;
1871                                         entry->status = ESI_FORWARD_DIRECT;
1872                                         lec_arp_put(entry);
1873                                         goto restart;
1874                                 }
1875                         }
1876                 }
1877         }
1878         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1879
1880         schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1881 }
1882
1883 /*
1884  * Try to find vcc where mac_address is attached.
1885  *
1886  */
1887 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1888                                        const unsigned char *mac_to_find, int is_rdesc,
1889                                        struct lec_arp_table **ret_entry)
1890 {
1891         unsigned long flags;
1892         struct lec_arp_table *entry;
1893         struct atm_vcc *found;
1894
1895         if (mac_to_find[0] & 0x01) {
1896                 switch (priv->lane_version) {
1897                 case 1:
1898                         return priv->mcast_vcc;
1899                 case 2: /* LANE2 wants arp for multicast addresses */
1900                         if (!compare_ether_addr(mac_to_find, bus_mac))
1901                                 return priv->mcast_vcc;
1902                         break;
1903                 default:
1904                         break;
1905                 }
1906         }
1907
1908         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1909         entry = lec_arp_find(priv, mac_to_find);
1910
1911         if (entry) {
1912                 if (entry->status == ESI_FORWARD_DIRECT) {
1913                         /* Connection Ok */
1914                         entry->last_used = jiffies;
1915                         lec_arp_hold(entry);
1916                         *ret_entry = entry;
1917                         found = entry->vcc;
1918                         goto out;
1919                 }
1920                 /*
1921                  * If the LE_ARP cache entry is still pending, reset count to 0
1922                  * so another LE_ARP request can be made for this frame.
1923                  */
1924                 if (entry->status == ESI_ARP_PENDING) {
1925                         entry->no_tries = 0;
1926                 }
1927                 /*
1928                  * Data direct VC not yet set up, check to see if the unknown
1929                  * frame count is greater than the limit. If the limit has
1930                  * not been reached, allow the caller to send packet to
1931                  * BUS.
1932                  */
1933                 if (entry->status != ESI_FLUSH_PENDING &&
1934                     entry->packets_flooded <
1935                     priv->maximum_unknown_frame_count) {
1936                         entry->packets_flooded++;
1937                         pr_debug("LEC_ARP: Flooding..\n");
1938                         found = priv->mcast_vcc;
1939                         goto out;
1940                 }
1941                 /*
1942                  * We got here because entry->status == ESI_FLUSH_PENDING
1943                  * or BUS flood limit was reached for an entry which is
1944                  * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1945                  */
1946                 lec_arp_hold(entry);
1947                 *ret_entry = entry;
1948                 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1949                         entry->vcc);
1950                 found = NULL;
1951         } else {
1952                 /* No matching entry was found */
1953                 entry = make_entry(priv, mac_to_find);
1954                 pr_debug("LEC_ARP: Making entry\n");
1955                 if (!entry) {
1956                         found = priv->mcast_vcc;
1957                         goto out;
1958                 }
1959                 lec_arp_add(priv, entry);
1960                 /* We want arp-request(s) to be sent */
1961                 entry->packets_flooded = 1;
1962                 entry->status = ESI_ARP_PENDING;
1963                 entry->no_tries = 1;
1964                 entry->last_used = entry->timestamp = jiffies;
1965                 entry->is_rdesc = is_rdesc;
1966                 if (entry->is_rdesc)
1967                         send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1968                                      NULL);
1969                 else
1970                         send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1971                 entry->timer.expires = jiffies + (1 * HZ);
1972                 entry->timer.function = lec_arp_expire_arp;
1973                 add_timer(&entry->timer);
1974                 found = priv->mcast_vcc;
1975         }
1976
1977 out:
1978         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1979         return found;
1980 }
1981
1982 static int
1983 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1984                 unsigned long permanent)
1985 {
1986         unsigned long flags;
1987         struct hlist_node *node, *next;
1988         struct lec_arp_table *entry;
1989         int i;
1990
1991         pr_debug("lec_addr_delete\n");
1992         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1993         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1994                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1995                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
1996                             && (permanent ||
1997                                 !(entry->flags & LEC_PERMANENT_FLAG))) {
1998                                 lec_arp_remove(priv, entry);
1999                                 lec_arp_put(entry);
2000                         }
2001                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2002                         return 0;
2003                 }
2004         }
2005         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2006         return -1;
2007 }
2008
2009 /*
2010  * Notifies:  Response to arp_request (atm_addr != NULL)
2011  */
2012 static void
2013 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
2014                const unsigned char *atm_addr, unsigned long remoteflag,
2015                unsigned int targetless_le_arp)
2016 {
2017         unsigned long flags;
2018         struct hlist_node *node, *next;
2019         struct lec_arp_table *entry, *tmp;
2020         int i;
2021
2022         pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2023         pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2024                 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2025                 mac_addr[4], mac_addr[5]);
2026
2027         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2028         entry = lec_arp_find(priv, mac_addr);
2029         if (entry == NULL && targetless_le_arp)
2030                 goto out;       /*
2031                                  * LANE2: ignore targetless LE_ARPs for which
2032                                  * we have no entry in the cache. 7.1.30
2033                                  */
2034         if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2035                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2036                         if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2037                                 hlist_del(&entry->next);
2038                                 del_timer(&entry->timer);
2039                                 tmp = lec_arp_find(priv, mac_addr);
2040                                 if (tmp) {
2041                                         del_timer(&tmp->timer);
2042                                         tmp->status = ESI_FORWARD_DIRECT;
2043                                         memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2044                                         tmp->vcc = entry->vcc;
2045                                         tmp->old_push = entry->old_push;
2046                                         tmp->last_used = jiffies;
2047                                         del_timer(&entry->timer);
2048                                         lec_arp_put(entry);
2049                                         entry = tmp;
2050                                 } else {
2051                                         entry->status = ESI_FORWARD_DIRECT;
2052                                         memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2053                                         entry->last_used = jiffies;
2054                                         lec_arp_add(priv, entry);
2055                                 }
2056                                 if (remoteflag)
2057                                         entry->flags |= LEC_REMOTE_FLAG;
2058                                 else
2059                                         entry->flags &= ~LEC_REMOTE_FLAG;
2060                                 pr_debug("After update\n");
2061                                 dump_arp_table(priv);
2062                                 goto out;
2063                         }
2064                 }
2065         }
2066
2067         entry = lec_arp_find(priv, mac_addr);
2068         if (!entry) {
2069                 entry = make_entry(priv, mac_addr);
2070                 if (!entry)
2071                         goto out;
2072                 entry->status = ESI_UNKNOWN;
2073                 lec_arp_add(priv, entry);
2074                 /* Temporary, changes before end of function */
2075         }
2076         memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2077         del_timer(&entry->timer);
2078         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2079                 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2080                         if (entry != tmp &&
2081                             !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2082                                 /* Vcc to this host exists */
2083                                 if (tmp->status > ESI_VC_PENDING) {
2084                                         /*
2085                                          * ESI_FLUSH_PENDING,
2086                                          * ESI_FORWARD_DIRECT
2087                                          */
2088                                         entry->vcc = tmp->vcc;
2089                                         entry->old_push = tmp->old_push;
2090                                 }
2091                                 entry->status = tmp->status;
2092                                 break;
2093                         }
2094                 }
2095         }
2096         if (remoteflag)
2097                 entry->flags |= LEC_REMOTE_FLAG;
2098         else
2099                 entry->flags &= ~LEC_REMOTE_FLAG;
2100         if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2101                 entry->status = ESI_VC_PENDING;
2102                 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2103         }
2104         pr_debug("After update2\n");
2105         dump_arp_table(priv);
2106 out:
2107         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2108 }
2109
2110 /*
2111  * Notifies: Vcc setup ready
2112  */
2113 static void
2114 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
2115               struct atm_vcc *vcc,
2116               void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2117 {
2118         unsigned long flags;
2119         struct hlist_node *node;
2120         struct lec_arp_table *entry;
2121         int i, found_entry = 0;
2122
2123         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2124         if (ioc_data->receive == 2) {
2125                 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2126
2127                 pr_debug("LEC_ARP: Attaching mcast forward\n");
2128 #if 0
2129                 entry = lec_arp_find(priv, bus_mac);
2130                 if (!entry) {
2131                         printk("LEC_ARP: Multicast entry not found!\n");
2132                         goto out;
2133                 }
2134                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2135                 entry->recv_vcc = vcc;
2136                 entry->old_recv_push = old_push;
2137 #endif
2138                 entry = make_entry(priv, bus_mac);
2139                 if (entry == NULL)
2140                         goto out;
2141                 del_timer(&entry->timer);
2142                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2143                 entry->recv_vcc = vcc;
2144                 entry->old_recv_push = old_push;
2145                 hlist_add_head(&entry->next, &priv->mcast_fwds);
2146                 goto out;
2147         } else if (ioc_data->receive == 1) {
2148                 /*
2149                  * Vcc which we don't want to make default vcc,
2150                  * attach it anyway.
2151                  */
2152                 pr_debug
2153                     ("LEC_ARP:Attaching data direct, not default: "
2154                      "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2155                      ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2156                      ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2157                      ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2158                      ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2159                      ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2160                      ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2161                      ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2162                      ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2163                      ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2164                      ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2165                 entry = make_entry(priv, bus_mac);
2166                 if (entry == NULL)
2167                         goto out;
2168                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2169                 memset(entry->mac_addr, 0, ETH_ALEN);
2170                 entry->recv_vcc = vcc;
2171                 entry->old_recv_push = old_push;
2172                 entry->status = ESI_UNKNOWN;
2173                 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2174                 entry->timer.function = lec_arp_expire_vcc;
2175                 hlist_add_head(&entry->next, &priv->lec_no_forward);
2176                 add_timer(&entry->timer);
2177                 dump_arp_table(priv);
2178                 goto out;
2179         }
2180         pr_debug
2181             ("LEC_ARP:Attaching data direct, default: "
2182              "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2183              ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2184              ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2185              ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2186              ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2187              ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2188              ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2189              ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2190              ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2191              ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2192              ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2193         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2194                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2195                         if (memcmp
2196                             (ioc_data->atm_addr, entry->atm_addr,
2197                              ATM_ESA_LEN) == 0) {
2198                                 pr_debug("LEC_ARP: Attaching data direct\n");
2199                                 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2200                                         entry->vcc ? entry->vcc->vci : 0,
2201                                         entry->recv_vcc ? entry->recv_vcc->
2202                                         vci : 0);
2203                                 found_entry = 1;
2204                                 del_timer(&entry->timer);
2205                                 entry->vcc = vcc;
2206                                 entry->old_push = old_push;
2207                                 if (entry->status == ESI_VC_PENDING) {
2208                                         if (priv->maximum_unknown_frame_count
2209                                             == 0)
2210                                                 entry->status =
2211                                                     ESI_FORWARD_DIRECT;
2212                                         else {
2213                                                 entry->timestamp = jiffies;
2214                                                 entry->status =
2215                                                     ESI_FLUSH_PENDING;
2216 #if 0
2217                                                 send_to_lecd(priv, l_flush_xmt,
2218                                                              NULL,
2219                                                              entry->atm_addr,
2220                                                              NULL);
2221 #endif
2222                                         }
2223                                 } else {
2224                                         /*
2225                                          * They were forming a connection
2226                                          * to us, and we to them. Our
2227                                          * ATM address is numerically lower
2228                                          * than theirs, so we make connection
2229                                          * we formed into default VCC (8.1.11).
2230                                          * Connection they made gets torn
2231                                          * down. This might confuse some
2232                                          * clients. Can be changed if
2233                                          * someone reports trouble...
2234                                          */
2235                                         ;
2236                                 }
2237                         }
2238                 }
2239         }
2240         if (found_entry) {
2241                 pr_debug("After vcc was added\n");
2242                 dump_arp_table(priv);
2243                 goto out;
2244         }
2245         /*
2246          * Not found, snatch address from first data packet that arrives
2247          * from this vcc
2248          */
2249         entry = make_entry(priv, bus_mac);
2250         if (!entry)
2251                 goto out;
2252         entry->vcc = vcc;
2253         entry->old_push = old_push;
2254         memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2255         memset(entry->mac_addr, 0, ETH_ALEN);
2256         entry->status = ESI_UNKNOWN;
2257         hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2258         entry->timer.expires = jiffies + priv->vcc_timeout_period;
2259         entry->timer.function = lec_arp_expire_vcc;
2260         add_timer(&entry->timer);
2261         pr_debug("After vcc was added\n");
2262         dump_arp_table(priv);
2263 out:
2264         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2265 }
2266
2267 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2268 {
2269         unsigned long flags;
2270         struct hlist_node *node;
2271         struct lec_arp_table *entry;
2272         int i;
2273
2274         pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2275 restart:
2276         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2277         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2278                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2279                         if (entry->flush_tran_id == tran_id
2280                             && entry->status == ESI_FLUSH_PENDING) {
2281                                 struct sk_buff *skb;
2282                                 struct atm_vcc *vcc = entry->vcc;
2283
2284                                 lec_arp_hold(entry);
2285                                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2286                                 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2287                                         lec_send(vcc, skb);
2288                                 entry->last_used = jiffies;
2289                                 entry->status = ESI_FORWARD_DIRECT;
2290                                 lec_arp_put(entry);
2291                                 pr_debug("LEC_ARP: Flushed\n");
2292                                 goto restart;
2293                         }
2294                 }
2295         }
2296         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2297         dump_arp_table(priv);
2298 }
2299
2300 static void
2301 lec_set_flush_tran_id(struct lec_priv *priv,
2302                       const unsigned char *atm_addr, unsigned long tran_id)
2303 {
2304         unsigned long flags;
2305         struct hlist_node *node;
2306         struct lec_arp_table *entry;
2307         int i;
2308
2309         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2310         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2311                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2312                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2313                                 entry->flush_tran_id = tran_id;
2314                                 pr_debug("Set flush transaction id to %lx for %p\n",
2315                                         tran_id, entry);
2316                         }
2317                 }
2318         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2319 }
2320
2321 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2322 {
2323         unsigned long flags;
2324         unsigned char mac_addr[] = {
2325                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2326         };
2327         struct lec_arp_table *to_add;
2328         struct lec_vcc_priv *vpriv;
2329         int err = 0;
2330
2331         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2332                 return -ENOMEM;
2333         vpriv->xoff = 0;
2334         vpriv->old_pop = vcc->pop;
2335         vcc->user_back = vpriv;
2336         vcc->pop = lec_pop;
2337         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2338         to_add = make_entry(priv, mac_addr);
2339         if (!to_add) {
2340                 vcc->pop = vpriv->old_pop;
2341                 kfree(vpriv);
2342                 err = -ENOMEM;
2343                 goto out;
2344         }
2345         memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2346         to_add->status = ESI_FORWARD_DIRECT;
2347         to_add->flags |= LEC_PERMANENT_FLAG;
2348         to_add->vcc = vcc;
2349         to_add->old_push = vcc->push;
2350         vcc->push = lec_push;
2351         priv->mcast_vcc = vcc;
2352         lec_arp_add(priv, to_add);
2353 out:
2354         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2355         return err;
2356 }
2357
2358 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2359 {
2360         unsigned long flags;
2361         struct hlist_node *node, *next;
2362         struct lec_arp_table *entry;
2363         int i;
2364
2365         pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2366         dump_arp_table(priv);
2367
2368         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2369
2370         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2371                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2372                         if (vcc == entry->vcc) {
2373                                 lec_arp_remove(priv, entry);
2374                                 lec_arp_put(entry);
2375                                 if (priv->mcast_vcc == vcc) {
2376                                         priv->mcast_vcc = NULL;
2377                                 }
2378                         }
2379                 }
2380         }
2381
2382         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2383                 if (entry->vcc == vcc) {
2384                         lec_arp_clear_vccs(entry);
2385                         del_timer(&entry->timer);
2386                         hlist_del(&entry->next);
2387                         lec_arp_put(entry);
2388                 }
2389         }
2390
2391         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2392                 if (entry->recv_vcc == vcc) {
2393                         lec_arp_clear_vccs(entry);
2394                         del_timer(&entry->timer);
2395                         hlist_del(&entry->next);
2396                         lec_arp_put(entry);
2397                 }
2398         }
2399
2400         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2401                 if (entry->recv_vcc == vcc) {
2402                         lec_arp_clear_vccs(entry);
2403                         /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2404                         hlist_del(&entry->next);
2405                         lec_arp_put(entry);
2406                 }
2407         }
2408
2409         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2410         dump_arp_table(priv);
2411 }
2412
2413 static void
2414 lec_arp_check_empties(struct lec_priv *priv,
2415                       struct atm_vcc *vcc, struct sk_buff *skb)
2416 {
2417         unsigned long flags;
2418         struct hlist_node *node, *next;
2419         struct lec_arp_table *entry, *tmp;
2420         struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2421         unsigned char *src;
2422 #ifdef CONFIG_TR
2423         struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2424
2425         if (priv->is_trdev)
2426                 src = tr_hdr->h_source;
2427         else
2428 #endif
2429                 src = hdr->h_source;
2430
2431         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2432         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2433                 if (vcc == entry->vcc) {
2434                         del_timer(&entry->timer);
2435                         memcpy(entry->mac_addr, src, ETH_ALEN);
2436                         entry->status = ESI_FORWARD_DIRECT;
2437                         entry->last_used = jiffies;
2438                         /* We might have got an entry */
2439                         if ((tmp = lec_arp_find(priv, src))) {
2440                                 lec_arp_remove(priv, tmp);
2441                                 lec_arp_put(tmp);
2442                         }
2443                         hlist_del(&entry->next);
2444                         lec_arp_add(priv, entry);
2445                         goto out;
2446                 }
2447         }
2448         pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2449 out:
2450         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2451 }
2452
2453 MODULE_LICENSE("GPL");