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