net/atm/lec.c

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