net/atm/lec.c

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