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   1 /*
   2  * lec.c: Lan Emulation driver
   3  *
   4  * Marko Kiiskila <mkiiskila@yahoo.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/bitops.h>
   9 #include <linux/capability.h>
  10
  11 /* We are ethernet device */
  12 #include <linux/if_ether.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <net/sock.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/ip.h>
  18 #include <asm/byteorder.h>
  19 #include <asm/uaccess.h>
  20 #include <net/arp.h>
  21 #include <net/dst.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/seq_file.h>
  26
  27 /* TokenRing if needed */
  28 #ifdef CONFIG_TR
  29 #include <linux/trdevice.h>
  30 #endif
  31
  32 /* And atm device */
  33 #include <linux/atmdev.h>
  34 #include <linux/atmlec.h>
  35
  36 /* Proxy LEC knows about bridging */
  37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
  38 #include <linux/if_bridge.h>
  39 #include "../bridge/br_private.h"
  40
  41 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
  42 #endif
  43
  44 /* Modular too */
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47
  48 #include "lec.h"
  49 #include "lec_arpc.h"
  50 #include "resources.h"
  51
  52 #if 0
  53 #define DPRINTK printk
  54 #else
  55 #define DPRINTK(format,args...)
  56 #endif
  57
  58 #define DUMP_PACKETS 0          /*
  59                                  * 0 = None,
  60                                  * 1 = 30 first bytes
  61                                  * 2 = Whole packet
  62                                  */
  63
  64 #define LEC_UNRES_QUE_LEN 8     /*
  65                                  * number of tx packets to queue for a
  66                                  * single destination while waiting for SVC
  67                                  */
  68
  69 static int lec_open(struct net_device *dev);
  70 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
  71 static int lec_close(struct net_device *dev);
  72 static struct net_device_stats *lec_get_stats(struct net_device *dev);
  73 static void lec_init(struct net_device *dev);
  74 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
  75                                           unsigned char *mac_addr);
  76 static int lec_arp_remove(struct lec_priv *priv,
  77                           struct lec_arp_table *to_remove);
  78 /* LANE2 functions */
  79 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
  80                                 u8 *tlvs, u32 sizeoftlvs);
  81 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
  82                          u8 **tlvs, u32 *sizeoftlvs);
  83 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
  84                                u8 *tlvs, u32 sizeoftlvs);
  85
  86 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
  87                            unsigned long permanent);
  88 static void lec_arp_check_empties(struct lec_priv *priv,
  89                                   struct atm_vcc *vcc, struct sk_buff *skb);
  90 static void lec_arp_destroy(struct lec_priv *priv);
  91 static void lec_arp_init(struct lec_priv *priv);
  92 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
  93                                        unsigned char *mac_to_find,
  94                                        int is_rdesc,
  95                                        struct lec_arp_table **ret_entry);
  96 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
  97                            unsigned char *atm_addr, unsigned long remoteflag,
  98                            unsigned int targetless_le_arp);
  99 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
 100 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
 101 static void lec_set_flush_tran_id(struct lec_priv *priv,
 102                                   unsigned char *atm_addr,
 103                                   unsigned long tran_id);
 104 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
 105                           struct atm_vcc *vcc,
 106                           void (*old_push) (struct atm_vcc *vcc,
 107                                             struct sk_buff *skb));
 108 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
 109
 110 static struct lane2_ops lane2_ops = {
 111         lane2_resolve,          /* resolve,             spec 3.1.3 */
 112         lane2_associate_req,    /* associate_req,       spec 3.1.4 */
 113         NULL                    /* associate indicator, spec 3.1.5 */
 114 };
 115
 116 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 117
 118 /* Device structures */
 119 static struct net_device *dev_lec[MAX_LEC_ITF];
 120
 121 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 122 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
 123 {
 124         struct ethhdr *eth;
 125         char *buff;
 126         struct lec_priv *priv;
 127
 128         /*
 129          * Check if this is a BPDU. If so, ask zeppelin to send
 130          * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
 131          * as the Config BPDU has
 132          */
 133         eth = (struct ethhdr *)skb->data;
 134         buff = skb->data + skb->dev->hard_header_len;
 135         if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
 136                 struct sock *sk;
 137                 struct sk_buff *skb2;
 138                 struct atmlec_msg *mesg;
 139
 140                 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 141                 if (skb2 == NULL)
 142                         return;
 143                 skb2->len = sizeof(struct atmlec_msg);
 144                 mesg = (struct atmlec_msg *)skb2->data;
 145                 mesg->type = l_topology_change;
 146                 buff += 4;
 147                 mesg->content.normal.flag = *buff & 0x01;       /* 0x01 is topology change */
 148
 149                 priv = (struct lec_priv *)dev->priv;
 150                 atm_force_charge(priv->lecd, skb2->truesize);
 151                 sk = sk_atm(priv->lecd);
 152                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 153                 sk->sk_data_ready(sk, skb2->len);
 154         }
 155
 156         return;
 157 }
 158 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 159
 160 /*
 161  * Modelled after tr_type_trans
 162  * All multicast and ARE or STE frames go to BUS.
 163  * Non source routed frames go by destination address.
 164  * Last hop source routed frames go by destination address.
 165  * Not last hop source routed frames go by _next_ route descriptor.
 166  * Returns pointer to destination MAC address or fills in rdesc
 167  * and returns NULL.
 168  */
 169 #ifdef CONFIG_TR
 170 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
 171 {
 172         struct trh_hdr *trh;
 173         int riflen, num_rdsc;
 174
 175         trh = (struct trh_hdr *)packet;
 176         if (trh->daddr[0] & (uint8_t) 0x80)
 177                 return bus_mac; /* multicast */
 178
 179         if (trh->saddr[0] & TR_RII) {
 180                 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
 181                 if ((ntohs(trh->rcf) >> 13) != 0)
 182                         return bus_mac; /* ARE or STE */
 183         } else
 184                 return trh->daddr;      /* not source routed */
 185
 186         if (riflen < 6)
 187                 return trh->daddr;      /* last hop, source routed */
 188
 189         /* riflen is 6 or more, packet has more than one route descriptor */
 190         num_rdsc = (riflen / 2) - 1;
 191         memset(rdesc, 0, ETH_ALEN);
 192         /* offset 4 comes from LAN destination field in LE control frames */
 193         if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
 194                 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(uint16_t));
 195         else {
 196                 memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
 197                 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
 198         }
 199
 200         return NULL;
 201 }
 202 #endif /* CONFIG_TR */
 203
 204 /*
 205  * Open/initialize the netdevice. This is called (in the current kernel)
 206  * sometime after booting when the 'ifconfig' program is run.
 207  *
 208  * This routine should set everything up anew at each open, even
 209  * registers that "should" only need to be set once at boot, so that
 210  * there is non-reboot way to recover if something goes wrong.
 211  */
 212
 213 static int lec_open(struct net_device *dev)
 214 {
 215         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 216
 217         netif_start_queue(dev);
 218         memset(&priv->stats, 0, sizeof(struct net_device_stats));
 219
 220         return 0;
 221 }
 222
 223 static __inline__ void
 224 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
 225 {
 226         ATM_SKB(skb)->vcc = vcc;
 227         ATM_SKB(skb)->atm_options = vcc->atm_options;
 228
 229         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 230         if (vcc->send(vcc, skb) < 0) {
 231                 priv->stats.tx_dropped++;
 232                 return;
 233         }
 234
 235         priv->stats.tx_packets++;
 236         priv->stats.tx_bytes += skb->len;
 237 }
 238
 239 static void lec_tx_timeout(struct net_device *dev)
 240 {
 241         printk(KERN_INFO "%s: tx timeout\n", dev->name);
 242         dev->trans_start = jiffies;
 243         netif_wake_queue(dev);
 244 }
 245
 246 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 247 {
 248         struct sk_buff *skb2;
 249         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 250         struct lecdatahdr_8023 *lec_h;
 251         struct atm_vcc *vcc;
 252         struct lec_arp_table *entry;
 253         unsigned char *dst;
 254         int min_frame_size;
 255 #ifdef CONFIG_TR
 256         unsigned char rdesc[ETH_ALEN];  /* Token Ring route descriptor */
 257 #endif
 258         int is_rdesc;
 259 #if DUMP_PACKETS > 0
 260         char buf[300];
 261         int i = 0;
 262 #endif /* DUMP_PACKETS >0 */
 263
 264         DPRINTK("lec_start_xmit called\n");
 265         if (!priv->lecd) {
 266                 printk("%s:No lecd attached\n", dev->name);
 267                 priv->stats.tx_errors++;
 268                 netif_stop_queue(dev);
 269                 return -EUNATCH;
 270         }
 271
 272         DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
 273                 (long)skb->head, (long)skb->data, (long)skb->tail,
 274                 (long)skb->end);
 275 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 276         if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
 277                 lec_handle_bridge(skb, dev);
 278 #endif
 279
 280         /* Make sure we have room for lec_id */
 281         if (skb_headroom(skb) < 2) {
 282
 283                 DPRINTK("lec_start_xmit: reallocating skb\n");
 284                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 285                 kfree_skb(skb);
 286                 if (skb2 == NULL)
 287                         return 0;
 288                 skb = skb2;
 289         }
 290         skb_push(skb, 2);
 291
 292         /* Put le header to place, works for TokenRing too */
 293         lec_h = (struct lecdatahdr_8023 *)skb->data;
 294         lec_h->le_header = htons(priv->lecid);
 295
 296 #ifdef CONFIG_TR
 297         /*
 298          * Ugly. Use this to realign Token Ring packets for
 299          * e.g. PCA-200E driver.
 300          */
 301         if (priv->is_trdev) {
 302                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 303                 kfree_skb(skb);
 304                 if (skb2 == NULL)
 305                         return 0;
 306                 skb = skb2;
 307         }
 308 #endif
 309
 310 #if DUMP_PACKETS > 0
 311         printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
 312                skb->len, priv->lecid);
 313 #if DUMP_PACKETS >= 2
 314         for (i = 0; i < skb->len && i < 99; i++) {
 315                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 316         }
 317 #elif DUMP_PACKETS >= 1
 318         for (i = 0; i < skb->len && i < 30; i++) {
 319                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 320         }
 321 #endif /* DUMP_PACKETS >= 1 */
 322         if (i == skb->len)
 323                 printk("%s\n", buf);
 324         else
 325                 printk("%s...\n", buf);
 326 #endif /* DUMP_PACKETS > 0 */
 327
 328         /* Minimum ethernet-frame size */
 329 #ifdef CONFIG_TR
 330         if (priv->is_trdev)
 331                 min_frame_size = LEC_MINIMUM_8025_SIZE;
 332         else
 333 #endif
 334                 min_frame_size = LEC_MINIMUM_8023_SIZE;
 335         if (skb->len < min_frame_size) {
 336                 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
 337                         skb2 = skb_copy_expand(skb, 0,
 338                                                min_frame_size - skb->truesize,
 339                                                GFP_ATOMIC);
 340                         dev_kfree_skb(skb);
 341                         if (skb2 == NULL) {
 342                                 priv->stats.tx_dropped++;
 343                                 return 0;
 344                         }
 345                         skb = skb2;
 346                 }
 347                 skb_put(skb, min_frame_size - skb->len);
 348         }
 349
 350         /* Send to right vcc */
 351         is_rdesc = 0;
 352         dst = lec_h->h_dest;
 353 #ifdef CONFIG_TR
 354         if (priv->is_trdev) {
 355                 dst = get_tr_dst(skb->data + 2, rdesc);
 356                 if (dst == NULL) {
 357                         dst = rdesc;
 358                         is_rdesc = 1;
 359                 }
 360         }
 361 #endif
 362         entry = NULL;
 363         vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
 364         DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
 365                 vcc, vcc ? vcc->flags : 0, entry);
 366         if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
 367                 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
 368                         DPRINTK("%s:lec_start_xmit: queuing packet, ",
 369                                 dev->name);
 370                         DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 371                                 lec_h->h_dest[0], lec_h->h_dest[1],
 372                                 lec_h->h_dest[2], lec_h->h_dest[3],
 373                                 lec_h->h_dest[4], lec_h->h_dest[5]);
 374                         skb_queue_tail(&entry->tx_wait, skb);
 375                 } else {
 376                         DPRINTK
 377                             ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
 378                              dev->name);
 379                         DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 380                                 lec_h->h_dest[0], lec_h->h_dest[1],
 381                                 lec_h->h_dest[2], lec_h->h_dest[3],
 382                                 lec_h->h_dest[4], lec_h->h_dest[5]);
 383                         priv->stats.tx_dropped++;
 384                         dev_kfree_skb(skb);
 385                 }
 386                 return 0;
 387         }
 388 #if DUMP_PACKETS > 0
 389         printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
 390 #endif /* DUMP_PACKETS > 0 */
 391
 392         while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
 393                 DPRINTK("lec.c: emptying tx queue, ");
 394                 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 395                         lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
 396                         lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
 397                 lec_send(vcc, skb2, priv);
 398         }
 399
 400         lec_send(vcc, skb, priv);
 401
 402         if (!atm_may_send(vcc, 0)) {
 403                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 404
 405                 vpriv->xoff = 1;
 406                 netif_stop_queue(dev);
 407
 408                 /*
 409                  * vcc->pop() might have occurred in between, making
 410                  * the vcc usuable again.  Since xmit is serialized,
 411                  * this is the only situation we have to re-test.
 412                  */
 413
 414                 if (atm_may_send(vcc, 0))
 415                         netif_wake_queue(dev);
 416         }
 417
 418         dev->trans_start = jiffies;
 419         return 0;
 420 }
 421
 422 /* The inverse routine to net_open(). */
 423 static int lec_close(struct net_device *dev)
 424 {
 425         netif_stop_queue(dev);
 426         return 0;
 427 }
 428
 429 /*
 430  * Get the current statistics.
 431  * This may be called with the card open or closed.
 432  */
 433 static struct net_device_stats *lec_get_stats(struct net_device *dev)
 434 {
 435         return &((struct lec_priv *)dev->priv)->stats;
 436 }
 437
 438 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 439 {
 440         unsigned long flags;
 441         struct net_device *dev = (struct net_device *)vcc->proto_data;
 442         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 443         struct atmlec_msg *mesg;
 444         struct lec_arp_table *entry;
 445         int i;
 446         char *tmp;              /* FIXME */
 447
 448         atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 449         mesg = (struct atmlec_msg *)skb->data;
 450         tmp = skb->data;
 451         tmp += sizeof(struct atmlec_msg);
 452         DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
 453         switch (mesg->type) {
 454         case l_set_mac_addr:
 455                 for (i = 0; i < 6; i++) {
 456                         dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
 457                 }
 458                 break;
 459         case l_del_mac_addr:
 460                 for (i = 0; i < 6; i++) {
 461                         dev->dev_addr[i] = 0;
 462                 }
 463                 break;
 464         case l_addr_delete:
 465                 lec_addr_delete(priv, mesg->content.normal.atm_addr,
 466                                 mesg->content.normal.flag);
 467                 break;
 468         case l_topology_change:
 469                 priv->topology_change = mesg->content.normal.flag;
 470                 break;
 471         case l_flush_complete:
 472                 lec_flush_complete(priv, mesg->content.normal.flag);
 473                 break;
 474         case l_narp_req:        /* LANE2: see 7.1.35 in the lane2 spec */
 475                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 476                 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
 477                 lec_arp_remove(priv, entry);
 478                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 479
 480                 if (mesg->content.normal.no_source_le_narp)
 481                         break;
 482                 /* FALL THROUGH */
 483         case l_arp_update:
 484                 lec_arp_update(priv, mesg->content.normal.mac_addr,
 485                                mesg->content.normal.atm_addr,
 486                                mesg->content.normal.flag,
 487                                mesg->content.normal.targetless_le_arp);
 488                 DPRINTK("lec: in l_arp_update\n");
 489                 if (mesg->sizeoftlvs != 0) {    /* LANE2 3.1.5 */
 490                         DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
 491                                 mesg->sizeoftlvs);
 492                         lane2_associate_ind(dev, mesg->content.normal.mac_addr,
 493                                             tmp, mesg->sizeoftlvs);
 494                 }
 495                 break;
 496         case l_config:
 497                 priv->maximum_unknown_frame_count =
 498                     mesg->content.config.maximum_unknown_frame_count;
 499                 priv->max_unknown_frame_time =
 500                     (mesg->content.config.max_unknown_frame_time * HZ);
 501                 priv->max_retry_count = mesg->content.config.max_retry_count;
 502                 priv->aging_time = (mesg->content.config.aging_time * HZ);
 503                 priv->forward_delay_time =
 504                     (mesg->content.config.forward_delay_time * HZ);
 505                 priv->arp_response_time =
 506                     (mesg->content.config.arp_response_time * HZ);
 507                 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
 508                 priv->path_switching_delay =
 509                     (mesg->content.config.path_switching_delay * HZ);
 510                 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
 511                 priv->lane2_ops = NULL;
 512                 if (priv->lane_version > 1)
 513                         priv->lane2_ops = &lane2_ops;
 514                 if (dev->change_mtu(dev, mesg->content.config.mtu))
 515                         printk("%s: change_mtu to %d failed\n", dev->name,
 516                                mesg->content.config.mtu);
 517                 priv->is_proxy = mesg->content.config.is_proxy;
 518                 break;
 519         case l_flush_tran_id:
 520                 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
 521                                       mesg->content.normal.flag);
 522                 break;
 523         case l_set_lecid:
 524                 priv->lecid =
 525                     (unsigned short)(0xffff & mesg->content.normal.flag);
 526                 break;
 527         case l_should_bridge:
 528 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 529                 {
 530                         struct net_bridge_fdb_entry *f;
 531
 532                         DPRINTK
 533                             ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 534                              dev->name, mesg->content.proxy.mac_addr[0],
 535                              mesg->content.proxy.mac_addr[1],
 536                              mesg->content.proxy.mac_addr[2],
 537                              mesg->content.proxy.mac_addr[3],
 538                              mesg->content.proxy.mac_addr[4],
 539                              mesg->content.proxy.mac_addr[5]);
 540
 541                         if (br_fdb_get_hook == NULL || dev->br_port == NULL)
 542                                 break;
 543
 544                         f = br_fdb_get_hook(dev->br_port->br,
 545                                             mesg->content.proxy.mac_addr);
 546                         if (f != NULL && f->dst->dev != dev
 547                             && f->dst->state == BR_STATE_FORWARDING) {
 548                                 /* hit from bridge table, send LE_ARP_RESPONSE */
 549                                 struct sk_buff *skb2;
 550                                 struct sock *sk;
 551
 552                                 DPRINTK
 553                                     ("%s: entry found, responding to zeppelin\n",
 554                                      dev->name);
 555                                 skb2 =
 556                                     alloc_skb(sizeof(struct atmlec_msg),
 557                                               GFP_ATOMIC);
 558                                 if (skb2 == NULL) {
 559                                         br_fdb_put_hook(f);
 560                                         break;
 561                                 }
 562                                 skb2->len = sizeof(struct atmlec_msg);
 563                                 memcpy(skb2->data, mesg,
 564                                        sizeof(struct atmlec_msg));
 565                                 atm_force_charge(priv->lecd, skb2->truesize);
 566                                 sk = sk_atm(priv->lecd);
 567                                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 568                                 sk->sk_data_ready(sk, skb2->len);
 569                         }
 570                         if (f != NULL)
 571                                 br_fdb_put_hook(f);
 572                 }
 573 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 574                 break;
 575         default:
 576                 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
 577                 dev_kfree_skb(skb);
 578                 return -EINVAL;
 579         }
 580         dev_kfree_skb(skb);
 581         return 0;
 582 }
 583
 584 static void lec_atm_close(struct atm_vcc *vcc)
 585 {
 586         struct sk_buff *skb;
 587         struct net_device *dev = (struct net_device *)vcc->proto_data;
 588         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 589
 590         priv->lecd = NULL;
 591         /* Do something needful? */
 592
 593         netif_stop_queue(dev);
 594         lec_arp_destroy(priv);
 595
 596         if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
 597                 printk("%s lec_atm_close: closing with messages pending\n",
 598                        dev->name);
 599         while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
 600                 atm_return(vcc, skb->truesize);
 601                 dev_kfree_skb(skb);
 602         }
 603
 604         printk("%s: Shut down!\n", dev->name);
 605         module_put(THIS_MODULE);
 606 }
 607
 608 static struct atmdev_ops lecdev_ops = {
 609         .close = lec_atm_close,
 610         .send = lec_atm_send
 611 };
 612
 613 static struct atm_dev lecatm_dev = {
 614         .ops = &lecdev_ops,
 615         .type = "lec",
 616         .number = 999,          /* dummy device number */
 617         .lock = SPIN_LOCK_UNLOCKED
 618 };
 619
 620 /*
 621  * LANE2: new argument struct sk_buff *data contains
 622  * the LE_ARP based TLVs introduced in the LANE2 spec
 623  */
 624 static int
 625 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
 626              unsigned char *mac_addr, unsigned char *atm_addr,
 627              struct sk_buff *data)
 628 {
 629         struct sock *sk;
 630         struct sk_buff *skb;
 631         struct atmlec_msg *mesg;
 632
 633         if (!priv || !priv->lecd) {
 634                 return -1;
 635         }
 636         skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 637         if (!skb)
 638                 return -1;
 639         skb->len = sizeof(struct atmlec_msg);
 640         mesg = (struct atmlec_msg *)skb->data;
 641         memset(mesg, 0, sizeof(struct atmlec_msg));
 642         mesg->type = type;
 643         if (data != NULL)
 644                 mesg->sizeoftlvs = data->len;
 645         if (mac_addr)
 646                 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
 647         else
 648                 mesg->content.normal.targetless_le_arp = 1;
 649         if (atm_addr)
 650                 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
 651
 652         atm_force_charge(priv->lecd, skb->truesize);
 653         sk = sk_atm(priv->lecd);
 654         skb_queue_tail(&sk->sk_receive_queue, skb);
 655         sk->sk_data_ready(sk, skb->len);
 656
 657         if (data != NULL) {
 658                 DPRINTK("lec: about to send %d bytes of data\n", data->len);
 659                 atm_force_charge(priv->lecd, data->truesize);
 660                 skb_queue_tail(&sk->sk_receive_queue, data);
 661                 sk->sk_data_ready(sk, skb->len);
 662         }
 663
 664         return 0;
 665 }
 666
 667 /* shamelessly stolen from drivers/net/net_init.c */
 668 static int lec_change_mtu(struct net_device *dev, int new_mtu)
 669 {
 670         if ((new_mtu < 68) || (new_mtu > 18190))
 671                 return -EINVAL;
 672         dev->mtu = new_mtu;
 673         return 0;
 674 }
 675
 676 static void lec_set_multicast_list(struct net_device *dev)
 677 {
 678         /*
 679          * by default, all multicast frames arrive over the bus.
 680          * eventually support selective multicast service
 681          */
 682         return;
 683 }
 684
 685 static void lec_init(struct net_device *dev)
 686 {
 687         dev->change_mtu = lec_change_mtu;
 688         dev->open = lec_open;
 689         dev->stop = lec_close;
 690         dev->hard_start_xmit = lec_start_xmit;
 691         dev->tx_timeout = lec_tx_timeout;
 692
 693         dev->get_stats = lec_get_stats;
 694         dev->set_multicast_list = lec_set_multicast_list;
 695         dev->do_ioctl = NULL;
 696         printk("%s: Initialized!\n", dev->name);
 697         return;
 698 }
 699
 700 static unsigned char lec_ctrl_magic[] = {
 701         0xff,
 702         0x00,
 703         0x01,
 704         0x01
 705 };
 706
 707 #define LEC_DATA_DIRECT_8023  2
 708 #define LEC_DATA_DIRECT_8025  3
 709
 710 static int lec_is_data_direct(struct atm_vcc *vcc)
 711 {
 712         return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
 713                 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
 714 }
 715
 716 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
 717 {
 718         unsigned long flags;
 719         struct net_device *dev = (struct net_device *)vcc->proto_data;
 720         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 721
 722 #if DUMP_PACKETS >0
 723         int i = 0;
 724         char buf[300];
 725
 726         printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
 727                vcc->vpi, vcc->vci);
 728 #endif
 729         if (!skb) {
 730                 DPRINTK("%s: null skb\n", dev->name);
 731                 lec_vcc_close(priv, vcc);
 732                 return;
 733         }
 734 #if DUMP_PACKETS > 0
 735         printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
 736                skb->len, priv->lecid);
 737 #if DUMP_PACKETS >= 2
 738         for (i = 0; i < skb->len && i < 99; i++) {
 739                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 740         }
 741 #elif DUMP_PACKETS >= 1
 742         for (i = 0; i < skb->len && i < 30; i++) {
 743                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 744         }
 745 #endif /* DUMP_PACKETS >= 1 */
 746         if (i == skb->len)
 747                 printk("%s\n", buf);
 748         else
 749                 printk("%s...\n", buf);
 750 #endif /* DUMP_PACKETS > 0 */
 751         if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {        /* Control frame, to daemon */
 752                 struct sock *sk = sk_atm(vcc);
 753
 754                 DPRINTK("%s: To daemon\n", dev->name);
 755                 skb_queue_tail(&sk->sk_receive_queue, skb);
 756                 sk->sk_data_ready(sk, skb->len);
 757         } else {                /* Data frame, queue to protocol handlers */
 758                 struct lec_arp_table *entry;
 759                 unsigned char *src, *dst;
 760
 761                 atm_return(vcc, skb->truesize);
 762                 if (*(uint16_t *) skb->data == htons(priv->lecid) ||
 763                     !priv->lecd || !(dev->flags & IFF_UP)) {
 764                         /*
 765                          * Probably looping back, or if lecd is missing,
 766                          * lecd has gone down
 767                          */
 768                         DPRINTK("Ignoring frame...\n");
 769                         dev_kfree_skb(skb);
 770                         return;
 771                 }
 772 #ifdef CONFIG_TR
 773                 if (priv->is_trdev)
 774                         dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
 775                 else
 776 #endif
 777                         dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
 778
 779                 /*
 780                  * If this is a Data Direct VCC, and the VCC does not match
 781                  * the LE_ARP cache entry, delete the LE_ARP cache entry.
 782                  */
 783                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 784                 if (lec_is_data_direct(vcc)) {
 785 #ifdef CONFIG_TR
 786                         if (priv->is_trdev)
 787                                 src =
 788                                     ((struct lecdatahdr_8025 *)skb->data)->
 789                                     h_source;
 790                         else
 791 #endif
 792                                 src =
 793                                     ((struct lecdatahdr_8023 *)skb->data)->
 794                                     h_source;
 795                         entry = lec_arp_find(priv, src);
 796                         if (entry && entry->vcc != vcc) {
 797                                 lec_arp_remove(priv, entry);
 798                                 kfree(entry);
 799                         }
 800                 }
 801                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 802
 803                 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
 804                     !priv->is_proxy &&  /* Proxy wants all the packets */
 805                     memcmp(dst, dev->dev_addr, dev->addr_len)) {
 806                         dev_kfree_skb(skb);
 807                         return;
 808                 }
 809                 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
 810                         lec_arp_check_empties(priv, vcc, skb);
 811                 }
 812                 skb->dev = dev;
 813                 skb_pull(skb, 2);       /* skip lec_id */
 814 #ifdef CONFIG_TR
 815                 if (priv->is_trdev)
 816                         skb->protocol = tr_type_trans(skb, dev);
 817                 else
 818 #endif
 819                         skb->protocol = eth_type_trans(skb, dev);
 820                 priv->stats.rx_packets++;
 821                 priv->stats.rx_bytes += skb->len;
 822                 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
 823                 netif_rx(skb);
 824         }
 825 }
 826
 827 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 828 {
 829         struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 830         struct net_device *dev = skb->dev;
 831
 832         if (vpriv == NULL) {
 833                 printk("lec_pop(): vpriv = NULL!?!?!?\n");
 834                 return;
 835         }
 836
 837         vpriv->old_pop(vcc, skb);
 838
 839         if (vpriv->xoff && atm_may_send(vcc, 0)) {
 840                 vpriv->xoff = 0;
 841                 if (netif_running(dev) && netif_queue_stopped(dev))
 842                         netif_wake_queue(dev);
 843         }
 844 }
 845
 846 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
 847 {
 848         struct lec_vcc_priv *vpriv;
 849         int bytes_left;
 850         struct atmlec_ioc ioc_data;
 851
 852         /* Lecd must be up in this case */
 853         bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
 854         if (bytes_left != 0) {
 855                 printk
 856                     ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
 857                      bytes_left);
 858         }
 859         if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
 860             !dev_lec[ioc_data.dev_num])
 861                 return -EINVAL;
 862         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
 863                 return -ENOMEM;
 864         vpriv->xoff = 0;
 865         vpriv->old_pop = vcc->pop;
 866         vcc->user_back = vpriv;
 867         vcc->pop = lec_pop;
 868         lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
 869                       &ioc_data, vcc, vcc->push);
 870         vcc->proto_data = dev_lec[ioc_data.dev_num];
 871         vcc->push = lec_push;
 872         return 0;
 873 }
 874
 875 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
 876 {
 877         if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
 878                 return -EINVAL;
 879         vcc->proto_data = dev_lec[arg];
 880         return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
 881 }
 882
 883 /* Initialize device. */
 884 static int lecd_attach(struct atm_vcc *vcc, int arg)
 885 {
 886         int i;
 887         struct lec_priv *priv;
 888
 889         if (arg < 0)
 890                 i = 0;
 891         else
 892                 i = arg;
 893 #ifdef CONFIG_TR
 894         if (arg >= MAX_LEC_ITF)
 895                 return -EINVAL;
 896 #else                           /* Reserve the top NUM_TR_DEVS for TR */
 897         if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
 898                 return -EINVAL;
 899 #endif
 900         if (!dev_lec[i]) {
 901                 int is_trdev, size;
 902
 903                 is_trdev = 0;
 904                 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
 905                         is_trdev = 1;
 906
 907                 size = sizeof(struct lec_priv);
 908 #ifdef CONFIG_TR
 909                 if (is_trdev)
 910                         dev_lec[i] = alloc_trdev(size);
 911                 else
 912 #endif
 913                         dev_lec[i] = alloc_etherdev(size);
 914                 if (!dev_lec[i])
 915                         return -ENOMEM;
 916                 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
 917                 if (register_netdev(dev_lec[i])) {
 918                         free_netdev(dev_lec[i]);
 919                         return -EINVAL;
 920                 }
 921
 922                 priv = dev_lec[i]->priv;
 923                 priv->is_trdev = is_trdev;
 924                 lec_init(dev_lec[i]);
 925         } else {
 926                 priv = dev_lec[i]->priv;
 927                 if (priv->lecd)
 928                         return -EADDRINUSE;
 929         }
 930         lec_arp_init(priv);
 931         priv->itfnum = i;       /* LANE2 addition */
 932         priv->lecd = vcc;
 933         vcc->dev = &lecatm_dev;
 934         vcc_insert_socket(sk_atm(vcc));
 935
 936         vcc->proto_data = dev_lec[i];
 937         set_bit(ATM_VF_META, &vcc->flags);
 938         set_bit(ATM_VF_READY, &vcc->flags);
 939
 940         /* Set default values to these variables */
 941         priv->maximum_unknown_frame_count = 1;
 942         priv->max_unknown_frame_time = (1 * HZ);
 943         priv->vcc_timeout_period = (1200 * HZ);
 944         priv->max_retry_count = 1;
 945         priv->aging_time = (300 * HZ);
 946         priv->forward_delay_time = (15 * HZ);
 947         priv->topology_change = 0;
 948         priv->arp_response_time = (1 * HZ);
 949         priv->flush_timeout = (4 * HZ);
 950         priv->path_switching_delay = (6 * HZ);
 951
 952         if (dev_lec[i]->flags & IFF_UP) {
 953                 netif_start_queue(dev_lec[i]);
 954         }
 955         __module_get(THIS_MODULE);
 956         return i;
 957 }
 958
 959 #ifdef CONFIG_PROC_FS
 960 static char *lec_arp_get_status_string(unsigned char status)
 961 {
 962         static char *lec_arp_status_string[] = {
 963                 "ESI_UNKNOWN       ",
 964                 "ESI_ARP_PENDING   ",
 965                 "ESI_VC_PENDING    ",
 966                 "<Undefined>       ",
 967                 "ESI_FLUSH_PENDING ",
 968                 "ESI_FORWARD_DIRECT"
 969         };
 970
 971         if (status > ESI_FORWARD_DIRECT)
 972                 status = 3;     /* ESI_UNDEFINED */
 973         return lec_arp_status_string[status];
 974 }
 975
 976 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
 977 {
 978         int i;
 979
 980         for (i = 0; i < ETH_ALEN; i++)
 981                 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
 982         seq_printf(seq, " ");
 983         for (i = 0; i < ATM_ESA_LEN; i++)
 984                 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
 985         seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
 986                    entry->flags & 0xffff);
 987         if (entry->vcc)
 988                 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
 989         else
 990                 seq_printf(seq, "        ");
 991         if (entry->recv_vcc) {
 992                 seq_printf(seq, "     %3d %3d", entry->recv_vcc->vpi,
 993                            entry->recv_vcc->vci);
 994         }
 995         seq_putc(seq, '\n');
 996 }
 997
 998 struct lec_state {
 999         unsigned long flags;
1000         struct lec_priv *locked;
1001         struct hlist_node *node;
1002         struct net_device *dev;
1003         int itf;
1004         int arp_table;
1005         int misc_table;
1006 };
1007
1008 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1009                           loff_t *l)
1010 {
1011         struct hlist_node *e = state->node;
1012         struct lec_arp_table *tmp;
1013
1014         if (!e)
1015                 e = tbl->first;
1016         if (e == (void *)1) {
1017                 e = tbl->first;
1018                 --*l;
1019         }
1020
1021         hlist_for_each_entry_from(tmp, e, next) {
1022                 if (--*l < 0)
1023                         break;
1024         }
1025         state->node = e;
1026
1027         return (*l < 0) ? state : NULL;
1028 }
1029
1030 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1031                           struct lec_priv *priv)
1032 {
1033         void *v = NULL;
1034         int p;
1035
1036         for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1037                 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1038                 if (v)
1039                         break;
1040         }
1041         state->arp_table = p;
1042         return v;
1043 }
1044
1045 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1046                            struct lec_priv *priv)
1047 {
1048         struct hlist_head *lec_misc_tables[] = {
1049                 &priv->lec_arp_empty_ones,
1050                 &priv->lec_no_forward,
1051                 &priv->mcast_fwds
1052         };
1053         void *v = NULL;
1054         int q;
1055
1056         for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1057                 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1058                 if (v)
1059                         break;
1060         }
1061         state->misc_table = q;
1062         return v;
1063 }
1064
1065 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1066                            struct lec_priv *priv)
1067 {
1068         if (!state->locked) {
1069                 state->locked = priv;
1070                 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1071         }
1072         if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1073                 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1074                 state->locked = NULL;
1075                 /* Partial state reset for the next time we get called */
1076                 state->arp_table = state->misc_table = 0;
1077         }
1078         return state->locked;
1079 }
1080
1081 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1082 {
1083         struct net_device *dev;
1084         void *v;
1085
1086         dev = state->dev ? state->dev : dev_lec[state->itf];
1087         v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1088         if (!v && dev) {
1089                 dev_put(dev);
1090                 /* Partial state reset for the next time we get called */
1091                 dev = NULL;
1092         }
1093         state->dev = dev;
1094         return v;
1095 }
1096
1097 static void *lec_get_idx(struct lec_state *state, loff_t l)
1098 {
1099         void *v = NULL;
1100
1101         for (; state->itf < MAX_LEC_ITF; state->itf++) {
1102                 v = lec_itf_walk(state, &l);
1103                 if (v)
1104                         break;
1105         }
1106         return v;
1107 }
1108
1109 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1110 {
1111         struct lec_state *state = seq->private;
1112
1113         state->itf = 0;
1114         state->dev = NULL;
1115         state->locked = NULL;
1116         state->arp_table = 0;
1117         state->misc_table = 0;
1118         state->node = (void *)1;
1119
1120         return *pos ? lec_get_idx(state, *pos) : (void *)1;
1121 }
1122
1123 static void lec_seq_stop(struct seq_file *seq, void *v)
1124 {
1125         struct lec_state *state = seq->private;
1126
1127         if (state->dev) {
1128                 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1129                                        state->flags);
1130                 dev_put(state->dev);
1131         }
1132 }
1133
1134 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1135 {
1136         struct lec_state *state = seq->private;
1137
1138         v = lec_get_idx(state, 1);
1139         *pos += !!PTR_ERR(v);
1140         return v;
1141 }
1142
1143 static int lec_seq_show(struct seq_file *seq, void *v)
1144 {
1145         static char lec_banner[] = "Itf  MAC          ATM destination"
1146             "                          Status            Flags "
1147             "VPI/VCI Recv VPI/VCI\n";
1148
1149         if (v == (void *)1)
1150                 seq_puts(seq, lec_banner);
1151         else {
1152                 struct lec_state *state = seq->private;
1153                 struct net_device *dev = state->dev;
1154                 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1155
1156                 seq_printf(seq, "%s ", dev->name);
1157                 lec_info(seq, entry);
1158         }
1159         return 0;
1160 }
1161
1162 static struct seq_operations lec_seq_ops = {
1163         .start = lec_seq_start,
1164         .next = lec_seq_next,
1165         .stop = lec_seq_stop,
1166         .show = lec_seq_show,
1167 };
1168
1169 static int lec_seq_open(struct inode *inode, struct file *file)
1170 {
1171         struct lec_state *state;
1172         struct seq_file *seq;
1173         int rc = -EAGAIN;
1174
1175         state = kmalloc(sizeof(*state), GFP_KERNEL);
1176         if (!state) {
1177                 rc = -ENOMEM;
1178                 goto out;
1179         }
1180
1181         rc = seq_open(file, &lec_seq_ops);
1182         if (rc)
1183                 goto out_kfree;
1184         seq = file->private_data;
1185         seq->private = state;
1186 out:
1187         return rc;
1188
1189 out_kfree:
1190         kfree(state);
1191         goto out;
1192 }
1193
1194 static int lec_seq_release(struct inode *inode, struct file *file)
1195 {
1196         return seq_release_private(inode, file);
1197 }
1198
1199 static struct file_operations lec_seq_fops = {
1200         .owner = THIS_MODULE,
1201         .open = lec_seq_open,
1202         .read = seq_read,
1203         .llseek = seq_lseek,
1204         .release = lec_seq_release,
1205 };
1206 #endif
1207
1208 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1209 {
1210         struct atm_vcc *vcc = ATM_SD(sock);
1211         int err = 0;
1212
1213         switch (cmd) {
1214         case ATMLEC_CTRL:
1215         case ATMLEC_MCAST:
1216         case ATMLEC_DATA:
1217                 if (!capable(CAP_NET_ADMIN))
1218                         return -EPERM;
1219                 break;
1220         default:
1221                 return -ENOIOCTLCMD;
1222         }
1223
1224         switch (cmd) {
1225         case ATMLEC_CTRL:
1226                 err = lecd_attach(vcc, (int)arg);
1227                 if (err >= 0)
1228                         sock->state = SS_CONNECTED;
1229                 break;
1230         case ATMLEC_MCAST:
1231                 err = lec_mcast_attach(vcc, (int)arg);
1232                 break;
1233         case ATMLEC_DATA:
1234                 err = lec_vcc_attach(vcc, (void __user *)arg);
1235                 break;
1236         }
1237
1238         return err;
1239 }
1240
1241 static struct atm_ioctl lane_ioctl_ops = {
1242         .owner = THIS_MODULE,
1243         .ioctl = lane_ioctl,
1244 };
1245
1246 static int __init lane_module_init(void)
1247 {
1248 #ifdef CONFIG_PROC_FS
1249         struct proc_dir_entry *p;
1250
1251         p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1252         if (p)
1253                 p->proc_fops = &lec_seq_fops;
1254 #endif
1255
1256         register_atm_ioctl(&lane_ioctl_ops);
1257         printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1258         return 0;
1259 }
1260
1261 static void __exit lane_module_cleanup(void)
1262 {
1263         int i;
1264         struct lec_priv *priv;
1265
1266         remove_proc_entry("lec", atm_proc_root);
1267
1268         deregister_atm_ioctl(&lane_ioctl_ops);
1269
1270         for (i = 0; i < MAX_LEC_ITF; i++) {
1271                 if (dev_lec[i] != NULL) {
1272                         priv = (struct lec_priv *)dev_lec[i]->priv;
1273                         unregister_netdev(dev_lec[i]);
1274                         free_netdev(dev_lec[i]);
1275                         dev_lec[i] = NULL;
1276                 }
1277         }
1278
1279         return;
1280 }
1281
1282 module_init(lane_module_init);
1283 module_exit(lane_module_cleanup);
1284
1285 /*
1286  * LANE2: 3.1.3, LE_RESOLVE.request
1287  * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1288  * If sizeoftlvs == NULL the default TLVs associated with with this
1289  * lec will be used.
1290  * If dst_mac == NULL, targetless LE_ARP will be sent
1291  */
1292 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1293                          u8 **tlvs, u32 *sizeoftlvs)
1294 {
1295         unsigned long flags;
1296         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1297         struct lec_arp_table *table;
1298         struct sk_buff *skb;
1299         int retval;
1300
1301         if (force == 0) {
1302                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1303                 table = lec_arp_find(priv, dst_mac);
1304                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1305                 if (table == NULL)
1306                         return -1;
1307
1308                 *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
1309                 if (*tlvs == NULL)
1310                         return -1;
1311
1312                 memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
1313                 *sizeoftlvs = table->sizeoftlvs;
1314
1315                 return 0;
1316         }
1317
1318         if (sizeoftlvs == NULL)
1319                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1320
1321         else {
1322                 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1323                 if (skb == NULL)
1324                         return -1;
1325                 skb->len = *sizeoftlvs;
1326                 memcpy(skb->data, *tlvs, *sizeoftlvs);
1327                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1328         }
1329         return retval;
1330 }
1331
1332 /*
1333  * LANE2: 3.1.4, LE_ASSOCIATE.request
1334  * Associate the *tlvs with the *lan_dst address.
1335  * Will overwrite any previous association
1336  * Returns 1 for success, 0 for failure (out of memory)
1337  *
1338  */
1339 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1340                                u8 *tlvs, u32 sizeoftlvs)
1341 {
1342         int retval;
1343         struct sk_buff *skb;
1344         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1345
1346         if (compare_ether_addr(lan_dst, dev->dev_addr))
1347                 return (0);     /* not our mac address */
1348
1349         kfree(priv->tlvs);      /* NULL if there was no previous association */
1350
1351         priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1352         if (priv->tlvs == NULL)
1353                 return (0);
1354         priv->sizeoftlvs = sizeoftlvs;
1355         memcpy(priv->tlvs, tlvs, sizeoftlvs);
1356
1357         skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1358         if (skb == NULL)
1359                 return 0;
1360         skb->len = sizeoftlvs;
1361         memcpy(skb->data, tlvs, sizeoftlvs);
1362         retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1363         if (retval != 0)
1364                 printk("lec.c: lane2_associate_req() failed\n");
1365         /*
1366          * If the previous association has changed we must
1367          * somehow notify other LANE entities about the change
1368          */
1369         return (1);
1370 }
1371
1372 /*
1373  * LANE2: 3.1.5, LE_ASSOCIATE.indication
1374  *
1375  */
1376 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1377                                 u8 *tlvs, u32 sizeoftlvs)
1378 {
1379 #if 0
1380         int i = 0;
1381 #endif
1382         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1383 #if 0                           /*
1384                                  * Why have the TLVs in LE_ARP entries
1385                                  * since we do not use them? When you
1386                                  * uncomment this code, make sure the
1387                                  * TLVs get freed when entry is killed
1388                                  */
1389         struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1390
1391         if (entry == NULL)
1392                 return;         /* should not happen */
1393
1394         kfree(entry->tlvs);
1395
1396         entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1397         if (entry->tlvs == NULL)
1398                 return;
1399
1400         entry->sizeoftlvs = sizeoftlvs;
1401         memcpy(entry->tlvs, tlvs, sizeoftlvs);
1402 #endif
1403 #if 0
1404         printk("lec.c: lane2_associate_ind()\n");
1405         printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1406         while (i < sizeoftlvs)
1407                 printk("%02x ", tlvs[i++]);
1408
1409         printk("\n");
1410 #endif
1411
1412         /* tell MPOA about the TLVs we saw */
1413         if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1414                 priv->lane2_ops->associate_indicator(dev, mac_addr,
1415                                                      tlvs, sizeoftlvs);
1416         }
1417         return;
1418 }
1419
1420 /*
1421  * Here starts what used to lec_arpc.c
1422  *
1423  * lec_arpc.c was added here when making
1424  * lane client modular. October 1997
1425  */
1426
1427 #include <linux/types.h>
1428 #include <linux/sched.h>
1429 #include <linux/timer.h>
1430 #include <asm/param.h>
1431 #include <asm/atomic.h>
1432 #include <linux/inetdevice.h>
1433 #include <net/route.h>
1434
1435 #if 0
1436 #define DPRINTK(format,args...)
1437 /*
1438 #define DPRINTK printk
1439 */
1440 #endif
1441 #define DEBUG_ARP_TABLE 0
1442
1443 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1444
1445 static void lec_arp_check_expire(unsigned long data);
1446 static void lec_arp_expire_arp(unsigned long data);
1447
1448 /*
1449  * Arp table funcs
1450  */
1451
1452 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1453
1454 /*
1455  * Initialization of arp-cache
1456  */
1457 static void lec_arp_init(struct lec_priv *priv)
1458 {
1459         unsigned short i;
1460
1461         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1462                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1463         }
1464         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1465         INIT_HLIST_HEAD(&priv->lec_no_forward);
1466         INIT_HLIST_HEAD(&priv->mcast_fwds);
1467         spin_lock_init(&priv->lec_arp_lock);
1468         init_timer(&priv->lec_arp_timer);
1469         priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
1470         priv->lec_arp_timer.data = (unsigned long)priv;
1471         priv->lec_arp_timer.function = lec_arp_check_expire;
1472         add_timer(&priv->lec_arp_timer);
1473 }
1474
1475 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1476 {
1477         if (entry->vcc) {
1478                 struct atm_vcc *vcc = entry->vcc;
1479                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1480                 struct net_device *dev = (struct net_device *)vcc->proto_data;
1481
1482                 vcc->pop = vpriv->old_pop;
1483                 if (vpriv->xoff)
1484                         netif_wake_queue(dev);
1485                 kfree(vpriv);
1486                 vcc->user_back = NULL;
1487                 vcc->push = entry->old_push;
1488                 vcc_release_async(vcc, -EPIPE);
1489                 entry->vcc = NULL;
1490         }
1491         if (entry->recv_vcc) {
1492                 entry->recv_vcc->push = entry->old_recv_push;
1493                 vcc_release_async(entry->recv_vcc, -EPIPE);
1494                 entry->recv_vcc = NULL;
1495         }
1496 }
1497
1498 /*
1499  * Insert entry to lec_arp_table
1500  * LANE2: Add to the end of the list to satisfy 8.1.13
1501  */
1502 static inline void
1503 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1504 {
1505         struct hlist_head *tmp;
1506
1507         tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1508         hlist_add_head(&entry->next, tmp);
1509
1510         DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1511                 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1512                 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1513                 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1514 }
1515
1516 /*
1517  * Remove entry from lec_arp_table
1518  */
1519 static int
1520 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1521 {
1522         struct hlist_node *node;
1523         struct lec_arp_table *entry;
1524         int i, remove_vcc = 1;
1525
1526         if (!to_remove) {
1527                 return -1;
1528         }
1529
1530         hlist_del(&to_remove->next);
1531         del_timer(&to_remove->timer);
1532
1533         /* If this is the only MAC connected to this VCC, also tear down the VCC */
1534         if (to_remove->status >= ESI_FLUSH_PENDING) {
1535                 /*
1536                  * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1537                  */
1538                 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1539                         hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1540                                 if (memcmp(to_remove->atm_addr,
1541                                            entry->atm_addr, ATM_ESA_LEN) == 0) {
1542                                         remove_vcc = 0;
1543                                         break;
1544                                 }
1545                         }
1546                 }
1547                 if (remove_vcc)
1548                         lec_arp_clear_vccs(to_remove);
1549         }
1550         skb_queue_purge(&to_remove->tx_wait);   /* FIXME: good place for this? */
1551
1552         DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1553                 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1554                 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1555                 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1556         return 0;
1557 }
1558
1559 #if DEBUG_ARP_TABLE
1560 static char *get_status_string(unsigned char st)
1561 {
1562         switch (st) {
1563         case ESI_UNKNOWN:
1564                 return "ESI_UNKNOWN";
1565         case ESI_ARP_PENDING:
1566                 return "ESI_ARP_PENDING";
1567         case ESI_VC_PENDING:
1568                 return "ESI_VC_PENDING";
1569         case ESI_FLUSH_PENDING:
1570                 return "ESI_FLUSH_PENDING";
1571         case ESI_FORWARD_DIRECT:
1572                 return "ESI_FORWARD_DIRECT";
1573         default:
1574                 return "<UNKNOWN>";
1575         }
1576 }
1577
1578 static void dump_arp_table(struct lec_priv *priv)
1579 {
1580         struct hlist_node *node;
1581         struct lec_arp_table *rulla;
1582         char buf[256];
1583         int i, j, offset;
1584
1585         printk("Dump %p:\n", priv);
1586         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1587                 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1588                         offset = 0;
1589                         offset += sprintf(buf, "%d: %p\n", i, rulla);
1590                         offset += sprintf(buf + offset, "Mac:");
1591                         for (j = 0; j < ETH_ALEN; j++) {
1592                                 offset += sprintf(buf + offset,
1593                                                   "%2.2x ",
1594                                                   rulla->mac_addr[j] & 0xff);
1595                         }
1596                         offset += sprintf(buf + offset, "Atm:");
1597                         for (j = 0; j < ATM_ESA_LEN; j++) {
1598                                 offset += sprintf(buf + offset,
1599                                                   "%2.2x ",
1600                                                   rulla->atm_addr[j] & 0xff);
1601                         }
1602                         offset += sprintf(buf + offset,
1603                                           "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1604                                           rulla->vcc ? rulla->vcc->vpi : 0,
1605                                           rulla->vcc ? rulla->vcc->vci : 0,
1606                                           rulla->recv_vcc ? rulla->recv_vcc->
1607                                           vpi : 0,
1608                                           rulla->recv_vcc ? rulla->recv_vcc->
1609                                           vci : 0, rulla->last_used,
1610                                           rulla->timestamp, rulla->no_tries);
1611                         offset +=
1612                             sprintf(buf + offset,
1613                                     "Flags:%x, Packets_flooded:%x, Status: %s ",
1614                                     rulla->flags, rulla->packets_flooded,
1615                                     get_status_string(rulla->status));
1616                         printk("%s\n", buf);
1617                 }
1618         }
1619
1620         if (!hlist_empty(&priv->lec_no_forward))
1621                 printk("No forward\n");
1622         hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1623                 offset = 0;
1624                 offset += sprintf(buf + offset, "Mac:");
1625                 for (j = 0; j < ETH_ALEN; j++) {
1626                         offset += sprintf(buf + offset, "%2.2x ",
1627                                           rulla->mac_addr[j] & 0xff);
1628                 }
1629                 offset += sprintf(buf + offset, "Atm:");
1630                 for (j = 0; j < ATM_ESA_LEN; j++) {
1631                         offset += sprintf(buf + offset, "%2.2x ",
1632                                           rulla->atm_addr[j] & 0xff);
1633                 }
1634                 offset += sprintf(buf + offset,
1635                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1636                                   rulla->vcc ? rulla->vcc->vpi : 0,
1637                                   rulla->vcc ? rulla->vcc->vci : 0,
1638                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1639                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1640                                   rulla->last_used,
1641                                   rulla->timestamp, rulla->no_tries);
1642                 offset += sprintf(buf + offset,
1643                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1644                                   rulla->flags, rulla->packets_flooded,
1645                                   get_status_string(rulla->status));
1646                 printk("%s\n", buf);
1647         }
1648
1649         if (!hlist_empty(&priv->lec_arp_empty_ones))
1650                 printk("Empty ones\n");
1651         hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1652                 offset = 0;
1653                 offset += sprintf(buf + offset, "Mac:");
1654                 for (j = 0; j < ETH_ALEN; j++) {
1655                         offset += sprintf(buf + offset, "%2.2x ",
1656                                           rulla->mac_addr[j] & 0xff);
1657                 }
1658                 offset += sprintf(buf + offset, "Atm:");
1659                 for (j = 0; j < ATM_ESA_LEN; j++) {
1660                         offset += sprintf(buf + offset, "%2.2x ",
1661                                           rulla->atm_addr[j] & 0xff);
1662                 }
1663                 offset += sprintf(buf + offset,
1664                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1665                                   rulla->vcc ? rulla->vcc->vpi : 0,
1666                                   rulla->vcc ? rulla->vcc->vci : 0,
1667                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1668                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1669                                   rulla->last_used,
1670                                   rulla->timestamp, rulla->no_tries);
1671                 offset += sprintf(buf + offset,
1672                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1673                                   rulla->flags, rulla->packets_flooded,
1674                                   get_status_string(rulla->status));
1675                 printk("%s", buf);
1676         }
1677
1678         if (!hlist_empty(&priv->mcast_fwds))
1679                 printk("Multicast Forward VCCs\n");
1680         hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1681                 offset = 0;
1682                 offset += sprintf(buf + offset, "Mac:");
1683                 for (j = 0; j < ETH_ALEN; j++) {
1684                         offset += sprintf(buf + offset, "%2.2x ",
1685                                           rulla->mac_addr[j] & 0xff);
1686                 }
1687                 offset += sprintf(buf + offset, "Atm:");
1688                 for (j = 0; j < ATM_ESA_LEN; j++) {
1689                         offset += sprintf(buf + offset, "%2.2x ",
1690                                           rulla->atm_addr[j] & 0xff);
1691                 }
1692                 offset += sprintf(buf + offset,
1693                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1694                                   rulla->vcc ? rulla->vcc->vpi : 0,
1695                                   rulla->vcc ? rulla->vcc->vci : 0,
1696                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1697                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1698                                   rulla->last_used,
1699                                   rulla->timestamp, rulla->no_tries);
1700                 offset += sprintf(buf + offset,
1701                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1702                                   rulla->flags, rulla->packets_flooded,
1703                                   get_status_string(rulla->status));
1704                 printk("%s\n", buf);
1705         }
1706
1707 }
1708 #else
1709 #define dump_arp_table(priv) do { } while (0)
1710 #endif
1711
1712 /*
1713  * Destruction of arp-cache
1714  */
1715 static void lec_arp_destroy(struct lec_priv *priv)
1716 {
1717         unsigned long flags;
1718         struct hlist_node *node, *next;
1719         struct lec_arp_table *entry;
1720         int i;
1721
1722         del_timer_sync(&priv->lec_arp_timer);
1723
1724         /*
1725          * Remove all entries
1726          */
1727
1728         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1729         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1730                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1731                         lec_arp_remove(priv, entry);
1732                         kfree(entry);
1733                 }
1734                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1735         }
1736
1737         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1738                 del_timer_sync(&entry->timer);
1739                 lec_arp_clear_vccs(entry);
1740                 hlist_del(&entry->next);
1741                 kfree(entry);
1742         }
1743         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1744
1745         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1746                 del_timer_sync(&entry->timer);
1747                 lec_arp_clear_vccs(entry);
1748                 hlist_del(&entry->next);
1749                 kfree(entry);
1750         }
1751         INIT_HLIST_HEAD(&priv->lec_no_forward);
1752
1753         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1754                 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1755                 lec_arp_clear_vccs(entry);
1756                 hlist_del(&entry->next);
1757                 kfree(entry);
1758         }
1759         INIT_HLIST_HEAD(&priv->mcast_fwds);
1760         priv->mcast_vcc = NULL;
1761         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1762 }
1763
1764 /*
1765  * Find entry by mac_address
1766  */
1767 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1768                                           unsigned char *mac_addr)
1769 {
1770         struct hlist_node *node;
1771         struct hlist_head *head;
1772         struct lec_arp_table *entry;
1773
1774         DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1775                 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1776                 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1777
1778         head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1779         hlist_for_each_entry(entry, node, head, next) {
1780                 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1781                         return entry;
1782                 }
1783         }
1784         return NULL;
1785 }
1786
1787 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1788                                         unsigned char *mac_addr)
1789 {
1790         struct lec_arp_table *to_return;
1791
1792         to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1793         if (!to_return) {
1794                 printk("LEC: Arp entry kmalloc failed\n");
1795                 return NULL;
1796         }
1797         memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1798         INIT_HLIST_NODE(&to_return->next);
1799         init_timer(&to_return->timer);
1800         to_return->timer.function = lec_arp_expire_arp;
1801         to_return->timer.data = (unsigned long)to_return;
1802         to_return->last_used = jiffies;
1803         to_return->priv = priv;
1804         skb_queue_head_init(&to_return->tx_wait);
1805         return to_return;
1806 }
1807
1808 /* Arp sent timer expired */
1809 static void lec_arp_expire_arp(unsigned long data)
1810 {
1811         struct lec_arp_table *entry;
1812
1813         entry = (struct lec_arp_table *)data;
1814
1815         DPRINTK("lec_arp_expire_arp\n");
1816         if (entry->status == ESI_ARP_PENDING) {
1817                 if (entry->no_tries <= entry->priv->max_retry_count) {
1818                         if (entry->is_rdesc)
1819                                 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1820                                              entry->mac_addr, NULL, NULL);
1821                         else
1822                                 send_to_lecd(entry->priv, l_arp_xmt,
1823                                              entry->mac_addr, NULL, NULL);
1824                         entry->no_tries++;
1825                 }
1826                 mod_timer(&entry->timer, jiffies + (1 * HZ));
1827         }
1828 }
1829
1830 /* Unknown/unused vcc expire, remove associated entry */
1831 static void lec_arp_expire_vcc(unsigned long data)
1832 {
1833         unsigned long flags;
1834         struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1835         struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1836
1837         del_timer(&to_remove->timer);
1838
1839         DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1840                 to_remove, priv,
1841                 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1842                 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1843
1844         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1845         hlist_del(&to_remove->next);
1846         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1847
1848         lec_arp_clear_vccs(to_remove);
1849         kfree(to_remove);
1850 }
1851
1852 /*
1853  * Expire entries.
1854  * 1. Re-set timer
1855  * 2. For each entry, delete entries that have aged past the age limit.
1856  * 3. For each entry, depending on the status of the entry, perform
1857  *    the following maintenance.
1858  *    a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1859  *       tick_count is above the max_unknown_frame_time, clear
1860  *       the tick_count to zero and clear the packets_flooded counter
1861  *       to zero. This supports the packet rate limit per address
1862  *       while flooding unknowns.
1863  *    b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1864  *       than or equal to the path_switching_delay, change the status
1865  *       to ESI_FORWARD_DIRECT. This causes the flush period to end
1866  *       regardless of the progress of the flush protocol.
1867  */
1868 static void lec_arp_check_expire(unsigned long data)
1869 {
1870         unsigned long flags;
1871         struct lec_priv *priv = (struct lec_priv *)data;
1872         struct hlist_node *node, *next;
1873         struct lec_arp_table *entry;
1874         unsigned long now;
1875         unsigned long time_to_check;
1876         int i;
1877
1878         DPRINTK("lec_arp_check_expire %p\n", priv);
1879         now = jiffies;
1880         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1881         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1882                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1883                         if ((entry->flags) & LEC_REMOTE_FLAG &&
1884                             priv->topology_change)
1885                                 time_to_check = priv->forward_delay_time;
1886                         else
1887                                 time_to_check = priv->aging_time;
1888
1889                         DPRINTK("About to expire: %lx - %lx > %lx\n",
1890                                 now, entry->last_used, time_to_check);
1891                         if (time_after(now, entry->last_used + time_to_check)
1892                             && !(entry->flags & LEC_PERMANENT_FLAG)
1893                             && !(entry->mac_addr[0] & 0x01)) {  /* LANE2: 7.1.20 */
1894                                 /* Remove entry */
1895                                 DPRINTK("LEC:Entry timed out\n");
1896                                 lec_arp_remove(priv, entry);
1897                                 kfree(entry);
1898                         } else {
1899                                 /* Something else */
1900                                 if ((entry->status == ESI_VC_PENDING ||
1901                                      entry->status == ESI_ARP_PENDING)
1902                                     && time_after_eq(now,
1903                                                      entry->timestamp +
1904                                                      priv->
1905                                                      max_unknown_frame_time)) {
1906                                         entry->timestamp = jiffies;
1907                                         entry->packets_flooded = 0;
1908                                         if (entry->status == ESI_VC_PENDING)
1909                                                 send_to_lecd(priv, l_svc_setup,
1910                                                              entry->mac_addr,
1911                                                              entry->atm_addr,
1912                                                              NULL);
1913                                 }
1914                                 if (entry->status == ESI_FLUSH_PENDING
1915                                     &&
1916                                     time_after_eq(now, entry->timestamp +
1917                                                   priv->path_switching_delay)) {
1918                                         struct sk_buff *skb;
1919
1920                                         while ((skb =
1921                                                 skb_dequeue(&entry->tx_wait)) !=
1922                                                NULL)
1923                                                 lec_send(entry->vcc, skb,
1924                                                          entry->priv);
1925                                         entry->last_used = jiffies;
1926                                         entry->status = ESI_FORWARD_DIRECT;
1927                                 }
1928                         }
1929                 }
1930         }
1931         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1932
1933         mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
1934 }
1935
1936 /*
1937  * Try to find vcc where mac_address is attached.
1938  *
1939  */
1940 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1941                                        unsigned char *mac_to_find, int is_rdesc,
1942                                        struct lec_arp_table **ret_entry)
1943 {
1944         unsigned long flags;
1945         struct lec_arp_table *entry;
1946         struct atm_vcc *found;
1947
1948         if (mac_to_find[0] & 0x01) {
1949                 switch (priv->lane_version) {
1950                 case 1:
1951                         return priv->mcast_vcc;
1952                         break;
1953                 case 2: /* LANE2 wants arp for multicast addresses */
1954                         if (!compare_ether_addr(mac_to_find, bus_mac))
1955                                 return priv->mcast_vcc;
1956                         break;
1957                 default:
1958                         break;
1959                 }
1960         }
1961
1962         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1963         entry = lec_arp_find(priv, mac_to_find);
1964
1965         if (entry) {
1966                 if (entry->status == ESI_FORWARD_DIRECT) {
1967                         /* Connection Ok */
1968                         entry->last_used = jiffies;
1969                         *ret_entry = entry;
1970                         found = entry->vcc;
1971                         goto out;
1972                 }
1973                 /*
1974                  * If the LE_ARP cache entry is still pending, reset count to 0
1975                  * so another LE_ARP request can be made for this frame.
1976                  */
1977                 if (entry->status == ESI_ARP_PENDING) {
1978                         entry->no_tries = 0;
1979                 }
1980                 /*
1981                  * Data direct VC not yet set up, check to see if the unknown
1982                  * frame count is greater than the limit. If the limit has
1983                  * not been reached, allow the caller to send packet to
1984                  * BUS.
1985                  */
1986                 if (entry->status != ESI_FLUSH_PENDING &&
1987                     entry->packets_flooded <
1988                     priv->maximum_unknown_frame_count) {
1989                         entry->packets_flooded++;
1990                         DPRINTK("LEC_ARP: Flooding..\n");
1991                         found = priv->mcast_vcc;
1992                         goto out;
1993                 }
1994                 /*
1995                  * We got here because entry->status == ESI_FLUSH_PENDING
1996                  * or BUS flood limit was reached for an entry which is
1997                  * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1998                  */
1999                 *ret_entry = entry;
2000                 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2001                         entry->vcc);
2002                 found = NULL;
2003         } else {
2004                 /* No matching entry was found */
2005                 entry = make_entry(priv, mac_to_find);
2006                 DPRINTK("LEC_ARP: Making entry\n");
2007                 if (!entry) {
2008                         found = priv->mcast_vcc;
2009                         goto out;
2010                 }
2011                 lec_arp_add(priv, entry);
2012                 /* We want arp-request(s) to be sent */
2013                 entry->packets_flooded = 1;
2014                 entry->status = ESI_ARP_PENDING;
2015                 entry->no_tries = 1;
2016                 entry->last_used = entry->timestamp = jiffies;
2017                 entry->is_rdesc = is_rdesc;
2018                 if (entry->is_rdesc)
2019                         send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2020                                      NULL);
2021                 else
2022                         send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2023                 entry->timer.expires = jiffies + (1 * HZ);
2024                 entry->timer.function = lec_arp_expire_arp;
2025                 add_timer(&entry->timer);
2026                 found = priv->mcast_vcc;
2027         }
2028
2029 out:
2030         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2031         return found;
2032 }
2033
2034 static int
2035 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2036                 unsigned long permanent)
2037 {
2038         unsigned long flags;
2039         struct hlist_node *node, *next;
2040         struct lec_arp_table *entry;
2041         int i;
2042
2043         DPRINTK("lec_addr_delete\n");
2044         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2045         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2046                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2047                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2048                             && (permanent ||
2049                                 !(entry->flags & LEC_PERMANENT_FLAG))) {
2050                                 lec_arp_remove(priv, entry);
2051                                 kfree(entry);
2052                         }
2053                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2054                         return 0;
2055                 }
2056         }
2057         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2058         return -1;
2059 }
2060
2061 /*
2062  * Notifies:  Response to arp_request (atm_addr != NULL)
2063  */
2064 static void
2065 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2066                unsigned char *atm_addr, unsigned long remoteflag,
2067                unsigned int targetless_le_arp)
2068 {
2069         unsigned long flags;
2070         struct hlist_node *node, *next;
2071         struct lec_arp_table *entry, *tmp;
2072         int i;
2073
2074         DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2075         DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2076                 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2077                 mac_addr[4], mac_addr[5]);
2078
2079         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2080         entry = lec_arp_find(priv, mac_addr);
2081         if (entry == NULL && targetless_le_arp)
2082                 goto out;       /*
2083                                  * LANE2: ignore targetless LE_ARPs for which
2084                                  * we have no entry in the cache. 7.1.30
2085                                  */
2086         if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2087                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2088                         if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2089                                 hlist_del(&entry->next);
2090                                 del_timer(&entry->timer);
2091                                 tmp = lec_arp_find(priv, mac_addr);
2092                                 if (tmp) {
2093                                         del_timer(&tmp->timer);
2094                                         tmp->status = ESI_FORWARD_DIRECT;
2095                                         memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2096                                         tmp->vcc = entry->vcc;
2097                                         tmp->old_push = entry->old_push;
2098                                         tmp->last_used = jiffies;
2099                                         del_timer(&entry->timer);
2100                                         kfree(entry);
2101                                         entry = tmp;
2102                                 } else {
2103                                         entry->status = ESI_FORWARD_DIRECT;
2104                                         memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2105                                         entry->last_used = jiffies;
2106                                         lec_arp_add(priv, entry);
2107                                 }
2108                                 if (remoteflag)
2109                                         entry->flags |= LEC_REMOTE_FLAG;
2110                                 else
2111                                         entry->flags &= ~LEC_REMOTE_FLAG;
2112                                 DPRINTK("After update\n");
2113                                 dump_arp_table(priv);
2114                                 goto out;
2115                         }
2116                 }
2117         }
2118
2119         entry = lec_arp_find(priv, mac_addr);
2120         if (!entry) {
2121                 entry = make_entry(priv, mac_addr);
2122                 if (!entry)
2123                         goto out;
2124                 entry->status = ESI_UNKNOWN;
2125                 lec_arp_add(priv, entry);
2126                 /* Temporary, changes before end of function */
2127         }
2128         memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2129         del_timer(&entry->timer);
2130         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2131                 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2132                         if (entry != tmp &&
2133                             !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2134                                 /* Vcc to this host exists */
2135                                 if (tmp->status > ESI_VC_PENDING) {
2136                                         /*
2137                                          * ESI_FLUSH_PENDING,
2138                                          * ESI_FORWARD_DIRECT
2139                                          */
2140                                         entry->vcc = tmp->vcc;
2141                                         entry->old_push = tmp->old_push;
2142                                 }
2143                                 entry->status = tmp->status;
2144                                 break;
2145                         }
2146                 }
2147         }
2148         if (remoteflag)
2149                 entry->flags |= LEC_REMOTE_FLAG;
2150         else
2151                 entry->flags &= ~LEC_REMOTE_FLAG;
2152         if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2153                 entry->status = ESI_VC_PENDING;
2154                 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2155         }
2156         DPRINTK("After update2\n");
2157         dump_arp_table(priv);
2158 out:
2159         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2160 }
2161
2162 /*
2163  * Notifies: Vcc setup ready
2164  */
2165 static void
2166 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2167               struct atm_vcc *vcc,
2168               void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2169 {
2170         unsigned long flags;
2171         struct hlist_node *node;
2172         struct lec_arp_table *entry;
2173         int i, found_entry = 0;
2174
2175         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2176         if (ioc_data->receive == 2) {
2177                 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2178
2179                 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2180 #if 0
2181                 entry = lec_arp_find(priv, bus_mac);
2182                 if (!entry) {
2183                         printk("LEC_ARP: Multicast entry not found!\n");
2184                         goto out;
2185                 }
2186                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2187                 entry->recv_vcc = vcc;
2188                 entry->old_recv_push = old_push;
2189 #endif
2190                 entry = make_entry(priv, bus_mac);
2191                 if (entry == NULL)
2192                         goto out;
2193                 del_timer(&entry->timer);
2194                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2195                 entry->recv_vcc = vcc;
2196                 entry->old_recv_push = old_push;
2197                 hlist_add_head(&entry->next, &priv->mcast_fwds);
2198                 goto out;
2199         } else if (ioc_data->receive == 1) {
2200                 /*
2201                  * Vcc which we don't want to make default vcc,
2202                  * attach it anyway.
2203                  */
2204                 DPRINTK
2205                     ("LEC_ARP:Attaching data direct, not default: "
2206                      "%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",
2207                      ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2208                      ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2209                      ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2210                      ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2211                      ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2212                      ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2213                      ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2214                      ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2215                      ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2216                      ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2217                 entry = make_entry(priv, bus_mac);
2218                 if (entry == NULL)
2219                         goto out;
2220                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2221                 memset(entry->mac_addr, 0, ETH_ALEN);
2222                 entry->recv_vcc = vcc;
2223                 entry->old_recv_push = old_push;
2224                 entry->status = ESI_UNKNOWN;
2225                 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2226                 entry->timer.function = lec_arp_expire_vcc;
2227                 hlist_add_head(&entry->next, &priv->lec_no_forward);
2228                 add_timer(&entry->timer);
2229                 dump_arp_table(priv);
2230                 goto out;
2231         }
2232         DPRINTK
2233             ("LEC_ARP:Attaching data direct, default: "
2234              "%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",
2235              ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2236              ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2237              ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2238              ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2239              ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2240              ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2241              ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2242              ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2243              ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2244              ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2245         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2246                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2247                         if (memcmp
2248                             (ioc_data->atm_addr, entry->atm_addr,
2249                              ATM_ESA_LEN) == 0) {
2250                                 DPRINTK("LEC_ARP: Attaching data direct\n");
2251                                 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2252                                         entry->vcc ? entry->vcc->vci : 0,
2253                                         entry->recv_vcc ? entry->recv_vcc->
2254                                         vci : 0);
2255                                 found_entry = 1;
2256                                 del_timer(&entry->timer);
2257                                 entry->vcc = vcc;
2258                                 entry->old_push = old_push;
2259                                 if (entry->status == ESI_VC_PENDING) {
2260                                         if (priv->maximum_unknown_frame_count
2261                                             == 0)
2262                                                 entry->status =
2263                                                     ESI_FORWARD_DIRECT;
2264                                         else {
2265                                                 entry->timestamp = jiffies;
2266                                                 entry->status =
2267                                                     ESI_FLUSH_PENDING;
2268 #if 0
2269                                                 send_to_lecd(priv, l_flush_xmt,
2270                                                              NULL,
2271                                                              entry->atm_addr,
2272                                                              NULL);
2273 #endif
2274                                         }
2275                                 } else {
2276                                         /*
2277                                          * They were forming a connection
2278                                          * to us, and we to them. Our
2279                                          * ATM address is numerically lower
2280                                          * than theirs, so we make connection
2281                                          * we formed into default VCC (8.1.11).
2282                                          * Connection they made gets torn
2283                                          * down. This might confuse some
2284                                          * clients. Can be changed if
2285                                          * someone reports trouble...
2286                                          */
2287                                         ;
2288                                 }
2289                         }
2290                 }
2291         }
2292         if (found_entry) {
2293                 DPRINTK("After vcc was added\n");
2294                 dump_arp_table(priv);
2295                 goto out;
2296         }
2297         /*
2298          * Not found, snatch address from first data packet that arrives
2299          * from this vcc
2300          */
2301         entry = make_entry(priv, bus_mac);
2302         if (!entry)
2303                 goto out;
2304         entry->vcc = vcc;
2305         entry->old_push = old_push;
2306         memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2307         memset(entry->mac_addr, 0, ETH_ALEN);
2308         entry->status = ESI_UNKNOWN;
2309         hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2310         entry->timer.expires = jiffies + priv->vcc_timeout_period;
2311         entry->timer.function = lec_arp_expire_vcc;
2312         add_timer(&entry->timer);
2313         DPRINTK("After vcc was added\n");
2314         dump_arp_table(priv);
2315 out:
2316         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2317 }
2318
2319 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2320 {
2321         unsigned long flags;
2322         struct hlist_node *node;
2323         struct lec_arp_table *entry;
2324         int i;
2325
2326         DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2327         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2328         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2329                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2330                         if (entry->flush_tran_id == tran_id
2331                             && entry->status == ESI_FLUSH_PENDING) {
2332                                 struct sk_buff *skb;
2333
2334                                 while ((skb =
2335                                         skb_dequeue(&entry->tx_wait)) != NULL)
2336                                         lec_send(entry->vcc, skb, entry->priv);
2337                                 entry->status = ESI_FORWARD_DIRECT;
2338                                 DPRINTK("LEC_ARP: Flushed\n");
2339                         }
2340                 }
2341         }
2342         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2343         dump_arp_table(priv);
2344 }
2345
2346 static void
2347 lec_set_flush_tran_id(struct lec_priv *priv,
2348                       unsigned char *atm_addr, unsigned long tran_id)
2349 {
2350         unsigned long flags;
2351         struct hlist_node *node;
2352         struct lec_arp_table *entry;
2353         int i;
2354
2355         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2356         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2357                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2358                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2359                                 entry->flush_tran_id = tran_id;
2360                                 DPRINTK("Set flush transaction id to %lx for %p\n",
2361                                         tran_id, entry);
2362                         }
2363                 }
2364         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2365 }
2366
2367 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2368 {
2369         unsigned long flags;
2370         unsigned char mac_addr[] = {
2371                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2372         };
2373         struct lec_arp_table *to_add;
2374         struct lec_vcc_priv *vpriv;
2375         int err = 0;
2376
2377         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2378                 return -ENOMEM;
2379         vpriv->xoff = 0;
2380         vpriv->old_pop = vcc->pop;
2381         vcc->user_back = vpriv;
2382         vcc->pop = lec_pop;
2383         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2384         to_add = make_entry(priv, mac_addr);
2385         if (!to_add) {
2386                 vcc->pop = vpriv->old_pop;
2387                 kfree(vpriv);
2388                 err = -ENOMEM;
2389                 goto out;
2390         }
2391         memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2392         to_add->status = ESI_FORWARD_DIRECT;
2393         to_add->flags |= LEC_PERMANENT_FLAG;
2394         to_add->vcc = vcc;
2395         to_add->old_push = vcc->push;
2396         vcc->push = lec_push;
2397         priv->mcast_vcc = vcc;
2398         lec_arp_add(priv, to_add);
2399 out:
2400         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2401         return err;
2402 }
2403
2404 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2405 {
2406         unsigned long flags;
2407         struct hlist_node *node, *next;
2408         struct lec_arp_table *entry;
2409         int i;
2410
2411         DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2412         dump_arp_table(priv);
2413
2414         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2415
2416         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2417                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2418                         if (vcc == entry->vcc) {
2419                                 lec_arp_remove(priv, entry);
2420                                 kfree(entry);
2421                                 if (priv->mcast_vcc == vcc) {
2422                                         priv->mcast_vcc = NULL;
2423                                 }
2424                         }
2425                 }
2426         }
2427
2428         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2429                 if (entry->vcc == vcc) {
2430                         lec_arp_clear_vccs(entry);
2431                         del_timer(&entry->timer);
2432                         hlist_del(&entry->next);
2433                         kfree(entry);
2434                 }
2435         }
2436
2437         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2438                 if (entry->recv_vcc == vcc) {
2439                         lec_arp_clear_vccs(entry);
2440                         del_timer(&entry->timer);
2441                         hlist_del(&entry->next);
2442                         kfree(entry);
2443                 }
2444         }
2445
2446         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2447                 if (entry->recv_vcc == vcc) {
2448                         lec_arp_clear_vccs(entry);
2449                         /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2450                         hlist_del(&entry->next);
2451                         kfree(entry);
2452                 }
2453         }
2454
2455         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2456         dump_arp_table(priv);
2457 }
2458
2459 static void
2460 lec_arp_check_empties(struct lec_priv *priv,
2461                       struct atm_vcc *vcc, struct sk_buff *skb)
2462 {
2463         unsigned long flags;
2464         struct hlist_node *node, *next;
2465         struct lec_arp_table *entry, *tmp;
2466         struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2467         unsigned char *src;
2468 #ifdef CONFIG_TR
2469         struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2470
2471         if (priv->is_trdev)
2472                 src = tr_hdr->h_source;
2473         else
2474 #endif
2475                 src = hdr->h_source;
2476
2477         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2478         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2479                 if (vcc == entry->vcc) {
2480                         del_timer(&entry->timer);
2481                         memcpy(entry->mac_addr, src, ETH_ALEN);
2482                         entry->status = ESI_FORWARD_DIRECT;
2483                         entry->last_used = jiffies;
2484                         /* We might have got an entry */
2485                         if ((tmp = lec_arp_find(priv, src))) {
2486                                 lec_arp_remove(priv, tmp);
2487                                 kfree(tmp);
2488                         }
2489                         hlist_del(&entry->next);
2490                         lec_arp_add(priv, entry);
2491                         goto out;
2492                 }
2493         }
2494         DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2495 out:
2496         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2497 }
2498
2499 MODULE_LICENSE("GPL");