linux/net/atm/lec.c
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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/seq_file.h>
  25
  26/* TokenRing if needed */
  27#ifdef CONFIG_TR
  28#include <linux/trdevice.h>
  29#endif
  30
  31/* And atm device */
  32#include <linux/atmdev.h>
  33#include <linux/atmlec.h>
  34
  35/* Proxy LEC knows about bridging */
  36#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
  37#include <linux/if_bridge.h>
  38#include "../bridge/br_private.h"
  39
  40static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
  41#endif
  42
  43/* Modular too */
  44#include <linux/module.h>
  45#include <linux/init.h>
  46
  47#include "lec.h"
  48#include "lec_arpc.h"
  49#include "resources.h"
  50
  51#define DUMP_PACKETS 0          /*
  52                                 * 0 = None,
  53                                 * 1 = 30 first bytes
  54                                 * 2 = Whole packet
  55                                 */
  56
  57#define LEC_UNRES_QUE_LEN 8     /*
  58                                 * number of tx packets to queue for a
  59                                 * single destination while waiting for SVC
  60                                 */
  61
  62static int lec_open(struct net_device *dev);
  63static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
  64static int lec_close(struct net_device *dev);
  65static void lec_init(struct net_device *dev);
  66static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
  67                                          const unsigned char *mac_addr);
  68static int lec_arp_remove(struct lec_priv *priv,
  69                          struct lec_arp_table *to_remove);
  70/* LANE2 functions */
  71static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
  72                                const u8 *tlvs, u32 sizeoftlvs);
  73static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
  74                         u8 **tlvs, u32 *sizeoftlvs);
  75static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
  76                               const u8 *tlvs, u32 sizeoftlvs);
  77
  78static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
  79                           unsigned long permanent);
  80static void lec_arp_check_empties(struct lec_priv *priv,
  81                                  struct atm_vcc *vcc, struct sk_buff *skb);
  82static void lec_arp_destroy(struct lec_priv *priv);
  83static void lec_arp_init(struct lec_priv *priv);
  84static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
  85                                       const unsigned char *mac_to_find,
  86                                       int is_rdesc,
  87                                       struct lec_arp_table **ret_entry);
  88static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
  89                           const unsigned char *atm_addr, unsigned long remoteflag,
  90                           unsigned int targetless_le_arp);
  91static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
  92static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
  93static void lec_set_flush_tran_id(struct lec_priv *priv,
  94                                  const unsigned char *atm_addr,
  95                                  unsigned long tran_id);
  96static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
  97                          struct atm_vcc *vcc,
  98                          void (*old_push) (struct atm_vcc *vcc,
  99                                            struct sk_buff *skb));
 100static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
 101
 102/* must be done under lec_arp_lock */
 103static inline void lec_arp_hold(struct lec_arp_table *entry)
 104{
 105        atomic_inc(&entry->usage);
 106}
 107
 108static inline void lec_arp_put(struct lec_arp_table *entry)
 109{
 110        if (atomic_dec_and_test(&entry->usage))
 111                kfree(entry);
 112}
 113
 114
 115static struct lane2_ops lane2_ops = {
 116        lane2_resolve,          /* resolve,             spec 3.1.3 */
 117        lane2_associate_req,    /* associate_req,       spec 3.1.4 */
 118        NULL                    /* associate indicator, spec 3.1.5 */
 119};
 120
 121static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 122
 123/* Device structures */
 124static struct net_device *dev_lec[MAX_LEC_ITF];
 125
 126#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 127static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
 128{
 129        struct ethhdr *eth;
 130        char *buff;
 131        struct lec_priv *priv;
 132
 133        /*
 134         * Check if this is a BPDU. If so, ask zeppelin to send
 135         * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
 136         * as the Config BPDU has
 137         */
 138        eth = (struct ethhdr *)skb->data;
 139        buff = skb->data + skb->dev->hard_header_len;
 140        if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
 141                struct sock *sk;
 142                struct sk_buff *skb2;
 143                struct atmlec_msg *mesg;
 144
 145                skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 146                if (skb2 == NULL)
 147                        return;
 148                skb2->len = sizeof(struct atmlec_msg);
 149                mesg = (struct atmlec_msg *)skb2->data;
 150                mesg->type = l_topology_change;
 151                buff += 4;
 152                mesg->content.normal.flag = *buff & 0x01;       /* 0x01 is topology change */
 153
 154                priv = netdev_priv(dev);
 155                atm_force_charge(priv->lecd, skb2->truesize);
 156                sk = sk_atm(priv->lecd);
 157                skb_queue_tail(&sk->sk_receive_queue, skb2);
 158                sk->sk_data_ready(sk, skb2->len);
 159        }
 160
 161        return;
 162}
 163#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 164
 165/*
 166 * Modelled after tr_type_trans
 167 * All multicast and ARE or STE frames go to BUS.
 168 * Non source routed frames go by destination address.
 169 * Last hop source routed frames go by destination address.
 170 * Not last hop source routed frames go by _next_ route descriptor.
 171 * Returns pointer to destination MAC address or fills in rdesc
 172 * and returns NULL.
 173 */
 174#ifdef CONFIG_TR
 175static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
 176{
 177        struct trh_hdr *trh;
 178        unsigned int riflen, num_rdsc;
 179
 180        trh = (struct trh_hdr *)packet;
 181        if (trh->daddr[0] & (uint8_t) 0x80)
 182                return bus_mac; /* multicast */
 183
 184        if (trh->saddr[0] & TR_RII) {
 185                riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
 186                if ((ntohs(trh->rcf) >> 13) != 0)
 187                        return bus_mac; /* ARE or STE */
 188        } else
 189                return trh->daddr;      /* not source routed */
 190
 191        if (riflen < 6)
 192                return trh->daddr;      /* last hop, source routed */
 193
 194        /* riflen is 6 or more, packet has more than one route descriptor */
 195        num_rdsc = (riflen / 2) - 1;
 196        memset(rdesc, 0, ETH_ALEN);
 197        /* offset 4 comes from LAN destination field in LE control frames */
 198        if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
 199                memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
 200        else {
 201                memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
 202                rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
 203        }
 204
 205        return NULL;
 206}
 207#endif /* CONFIG_TR */
 208
 209/*
 210 * Open/initialize the netdevice. This is called (in the current kernel)
 211 * sometime after booting when the 'ifconfig' program is run.
 212 *
 213 * This routine should set everything up anew at each open, even
 214 * registers that "should" only need to be set once at boot, so that
 215 * there is non-reboot way to recover if something goes wrong.
 216 */
 217
 218static int lec_open(struct net_device *dev)
 219{
 220        netif_start_queue(dev);
 221        memset(&dev->stats, 0, sizeof(struct net_device_stats));
 222
 223        return 0;
 224}
 225
 226static void
 227lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
 228{
 229        struct net_device *dev = skb->dev;
 230
 231        ATM_SKB(skb)->vcc = vcc;
 232        ATM_SKB(skb)->atm_options = vcc->atm_options;
 233
 234        atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 235        if (vcc->send(vcc, skb) < 0) {
 236                dev->stats.tx_dropped++;
 237                return;
 238        }
 239
 240        dev->stats.tx_packets++;
 241        dev->stats.tx_bytes += skb->len;
 242}
 243
 244static void lec_tx_timeout(struct net_device *dev)
 245{
 246        printk(KERN_INFO "%s: tx timeout\n", dev->name);
 247        dev->trans_start = jiffies;
 248        netif_wake_queue(dev);
 249}
 250
 251static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 252{
 253        struct sk_buff *skb2;
 254        struct lec_priv *priv = netdev_priv(dev);
 255        struct lecdatahdr_8023 *lec_h;
 256        struct atm_vcc *vcc;
 257        struct lec_arp_table *entry;
 258        unsigned char *dst;
 259        int min_frame_size;
 260#ifdef CONFIG_TR
 261        unsigned char rdesc[ETH_ALEN];  /* Token Ring route descriptor */
 262#endif
 263        int is_rdesc;
 264#if DUMP_PACKETS > 0
 265        char buf[300];
 266        int i = 0;
 267#endif /* DUMP_PACKETS >0 */
 268
 269        pr_debug("lec_start_xmit called\n");
 270        if (!priv->lecd) {
 271                printk("%s:No lecd attached\n", dev->name);
 272                dev->stats.tx_errors++;
 273                netif_stop_queue(dev);
 274                return -EUNATCH;
 275        }
 276
 277        pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
 278                (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
 279                (long)skb_end_pointer(skb));
 280#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 281        if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
 282                lec_handle_bridge(skb, dev);
 283#endif
 284
 285        /* Make sure we have room for lec_id */
 286        if (skb_headroom(skb) < 2) {
 287
 288                pr_debug("lec_start_xmit: reallocating skb\n");
 289                skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 290                kfree_skb(skb);
 291                if (skb2 == NULL)
 292                        return 0;
 293                skb = skb2;
 294        }
 295        skb_push(skb, 2);
 296
 297        /* Put le header to place, works for TokenRing too */
 298        lec_h = (struct lecdatahdr_8023 *)skb->data;
 299        lec_h->le_header = htons(priv->lecid);
 300
 301#ifdef CONFIG_TR
 302        /*
 303         * Ugly. Use this to realign Token Ring packets for
 304         * e.g. PCA-200E driver.
 305         */
 306        if (priv->is_trdev) {
 307                skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 308                kfree_skb(skb);
 309                if (skb2 == NULL)
 310                        return 0;
 311                skb = skb2;
 312        }
 313#endif
 314
 315#if DUMP_PACKETS > 0
 316        printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
 317               skb->len, priv->lecid);
 318#if DUMP_PACKETS >= 2
 319        for (i = 0; i < skb->len && i < 99; i++) {
 320                sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 321        }
 322#elif DUMP_PACKETS >= 1
 323        for (i = 0; i < skb->len && i < 30; i++) {
 324                sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 325        }
 326#endif /* DUMP_PACKETS >= 1 */
 327        if (i == skb->len)
 328                printk("%s\n", buf);
 329        else
 330                printk("%s...\n", buf);
 331#endif /* DUMP_PACKETS > 0 */
 332
 333        /* Minimum ethernet-frame size */
 334#ifdef CONFIG_TR
 335        if (priv->is_trdev)
 336                min_frame_size = LEC_MINIMUM_8025_SIZE;
 337        else
 338#endif
 339                min_frame_size = LEC_MINIMUM_8023_SIZE;
 340        if (skb->len < min_frame_size) {
 341                if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
 342                        skb2 = skb_copy_expand(skb, 0,
 343                                               min_frame_size - skb->truesize,
 344                                               GFP_ATOMIC);
 345                        dev_kfree_skb(skb);
 346                        if (skb2 == NULL) {
 347                                dev->stats.tx_dropped++;
 348                                return 0;
 349                        }
 350                        skb = skb2;
 351                }
 352                skb_put(skb, min_frame_size - skb->len);
 353        }
 354
 355        /* Send to right vcc */
 356        is_rdesc = 0;
 357        dst = lec_h->h_dest;
 358#ifdef CONFIG_TR
 359        if (priv->is_trdev) {
 360                dst = get_tr_dst(skb->data + 2, rdesc);
 361                if (dst == NULL) {
 362                        dst = rdesc;
 363                        is_rdesc = 1;
 364                }
 365        }
 366#endif
 367        entry = NULL;
 368        vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
 369        pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
 370                vcc, vcc ? vcc->flags : 0, entry);
 371        if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
 372                if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
 373                        pr_debug("%s:lec_start_xmit: queuing packet, ",
 374                                dev->name);
 375                        pr_debug("MAC address %pM\n", lec_h->h_dest);
 376                        skb_queue_tail(&entry->tx_wait, skb);
 377                } else {
 378                        pr_debug
 379                            ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
 380                             dev->name);
 381                        pr_debug("MAC address %pM\n", lec_h->h_dest);
 382                        dev->stats.tx_dropped++;
 383                        dev_kfree_skb(skb);
 384                }
 385                goto out;
 386        }
 387#if DUMP_PACKETS > 0
 388        printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
 389#endif /* DUMP_PACKETS > 0 */
 390
 391        while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
 392                pr_debug("lec.c: emptying tx queue, ");
 393                pr_debug("MAC address %pM\n", lec_h->h_dest);
 394                lec_send(vcc, skb2);
 395        }
 396
 397        lec_send(vcc, skb);
 398
 399        if (!atm_may_send(vcc, 0)) {
 400                struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 401
 402                vpriv->xoff = 1;
 403                netif_stop_queue(dev);
 404
 405                /*
 406                 * vcc->pop() might have occurred in between, making
 407                 * the vcc usuable again.  Since xmit is serialized,
 408                 * this is the only situation we have to re-test.
 409                 */
 410
 411                if (atm_may_send(vcc, 0))
 412                        netif_wake_queue(dev);
 413        }
 414
 415out:
 416        if (entry)
 417                lec_arp_put(entry);
 418        dev->trans_start = jiffies;
 419        return 0;
 420}
 421
 422/* The inverse routine to net_open(). */
 423static int lec_close(struct net_device *dev)
 424{
 425        netif_stop_queue(dev);
 426        return 0;
 427}
 428
 429static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 430{
 431        unsigned long flags;
 432        struct net_device *dev = (struct net_device *)vcc->proto_data;
 433        struct lec_priv *priv = netdev_priv(dev);
 434        struct atmlec_msg *mesg;
 435        struct lec_arp_table *entry;
 436        int i;
 437        char *tmp;              /* FIXME */
 438
 439        atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 440        mesg = (struct atmlec_msg *)skb->data;
 441        tmp = skb->data;
 442        tmp += sizeof(struct atmlec_msg);
 443        pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
 444        switch (mesg->type) {
 445        case l_set_mac_addr:
 446                for (i = 0; i < 6; i++) {
 447                        dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
 448                }
 449                break;
 450        case l_del_mac_addr:
 451                for (i = 0; i < 6; i++) {
 452                        dev->dev_addr[i] = 0;
 453                }
 454                break;
 455        case l_addr_delete:
 456                lec_addr_delete(priv, mesg->content.normal.atm_addr,
 457                                mesg->content.normal.flag);
 458                break;
 459        case l_topology_change:
 460                priv->topology_change = mesg->content.normal.flag;
 461                break;
 462        case l_flush_complete:
 463                lec_flush_complete(priv, mesg->content.normal.flag);
 464                break;
 465        case l_narp_req:        /* LANE2: see 7.1.35 in the lane2 spec */
 466                spin_lock_irqsave(&priv->lec_arp_lock, flags);
 467                entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
 468                lec_arp_remove(priv, entry);
 469                spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 470
 471                if (mesg->content.normal.no_source_le_narp)
 472                        break;
 473                /* FALL THROUGH */
 474        case l_arp_update:
 475                lec_arp_update(priv, mesg->content.normal.mac_addr,
 476                               mesg->content.normal.atm_addr,
 477                               mesg->content.normal.flag,
 478                               mesg->content.normal.targetless_le_arp);
 479                pr_debug("lec: in l_arp_update\n");
 480                if (mesg->sizeoftlvs != 0) {    /* LANE2 3.1.5 */
 481                        pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
 482                                mesg->sizeoftlvs);
 483                        lane2_associate_ind(dev, mesg->content.normal.mac_addr,
 484                                            tmp, mesg->sizeoftlvs);
 485                }
 486                break;
 487        case l_config:
 488                priv->maximum_unknown_frame_count =
 489                    mesg->content.config.maximum_unknown_frame_count;
 490                priv->max_unknown_frame_time =
 491                    (mesg->content.config.max_unknown_frame_time * HZ);
 492                priv->max_retry_count = mesg->content.config.max_retry_count;
 493                priv->aging_time = (mesg->content.config.aging_time * HZ);
 494                priv->forward_delay_time =
 495                    (mesg->content.config.forward_delay_time * HZ);
 496                priv->arp_response_time =
 497                    (mesg->content.config.arp_response_time * HZ);
 498                priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
 499                priv->path_switching_delay =
 500                    (mesg->content.config.path_switching_delay * HZ);
 501                priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
 502                priv->lane2_ops = NULL;
 503                if (priv->lane_version > 1)
 504                        priv->lane2_ops = &lane2_ops;
 505                if (dev_set_mtu(dev, mesg->content.config.mtu))
 506                        printk("%s: change_mtu to %d failed\n", dev->name,
 507                               mesg->content.config.mtu);
 508                priv->is_proxy = mesg->content.config.is_proxy;
 509                break;
 510        case l_flush_tran_id:
 511                lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
 512                                      mesg->content.normal.flag);
 513                break;
 514        case l_set_lecid:
 515                priv->lecid =
 516                    (unsigned short)(0xffff & mesg->content.normal.flag);
 517                break;
 518        case l_should_bridge:
 519#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 520                {
 521                        struct net_bridge_fdb_entry *f;
 522
 523                        pr_debug("%s: bridge zeppelin asks about %pM\n",
 524                                 dev->name, mesg->content.proxy.mac_addr);
 525
 526                        if (br_fdb_get_hook == NULL || dev->br_port == NULL)
 527                                break;
 528
 529                        f = br_fdb_get_hook(dev->br_port->br,
 530                                            mesg->content.proxy.mac_addr);
 531                        if (f != NULL && f->dst->dev != dev
 532                            && f->dst->state == BR_STATE_FORWARDING) {
 533                                /* hit from bridge table, send LE_ARP_RESPONSE */
 534                                struct sk_buff *skb2;
 535                                struct sock *sk;
 536
 537                                pr_debug
 538                                    ("%s: entry found, responding to zeppelin\n",
 539                                     dev->name);
 540                                skb2 =
 541                                    alloc_skb(sizeof(struct atmlec_msg),
 542                                              GFP_ATOMIC);
 543                                if (skb2 == NULL) {
 544                                        br_fdb_put_hook(f);
 545                                        break;
 546                                }
 547                                skb2->len = sizeof(struct atmlec_msg);
 548                                skb_copy_to_linear_data(skb2, mesg,
 549                                                        sizeof(*mesg));
 550                                atm_force_charge(priv->lecd, skb2->truesize);
 551                                sk = sk_atm(priv->lecd);
 552                                skb_queue_tail(&sk->sk_receive_queue, skb2);
 553                                sk->sk_data_ready(sk, skb2->len);
 554                        }
 555                        if (f != NULL)
 556                                br_fdb_put_hook(f);
 557                }
 558#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 559                break;
 560        default:
 561                printk("%s: Unknown message type %d\n", dev->name, mesg->type);
 562                dev_kfree_skb(skb);
 563                return -EINVAL;
 564        }
 565        dev_kfree_skb(skb);
 566        return 0;
 567}
 568
 569static void lec_atm_close(struct atm_vcc *vcc)
 570{
 571        struct sk_buff *skb;
 572        struct net_device *dev = (struct net_device *)vcc->proto_data;
 573        struct lec_priv *priv = netdev_priv(dev);
 574
 575        priv->lecd = NULL;
 576        /* Do something needful? */
 577
 578        netif_stop_queue(dev);
 579        lec_arp_destroy(priv);
 580
 581        if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
 582                printk("%s lec_atm_close: closing with messages pending\n",
 583                       dev->name);
 584        while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
 585                atm_return(vcc, skb->truesize);
 586                dev_kfree_skb(skb);
 587        }
 588
 589        printk("%s: Shut down!\n", dev->name);
 590        module_put(THIS_MODULE);
 591}
 592
 593static struct atmdev_ops lecdev_ops = {
 594        .close = lec_atm_close,
 595        .send = lec_atm_send
 596};
 597
 598static struct atm_dev lecatm_dev = {
 599        .ops = &lecdev_ops,
 600        .type = "lec",
 601        .number = 999,          /* dummy device number */
 602        .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
 603};
 604
 605/*
 606 * LANE2: new argument struct sk_buff *data contains
 607 * the LE_ARP based TLVs introduced in the LANE2 spec
 608 */
 609static int
 610send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
 611             const unsigned char *mac_addr, const unsigned char *atm_addr,
 612             struct sk_buff *data)
 613{
 614        struct sock *sk;
 615        struct sk_buff *skb;
 616        struct atmlec_msg *mesg;
 617
 618        if (!priv || !priv->lecd) {
 619                return -1;
 620        }
 621        skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 622        if (!skb)
 623                return -1;
 624        skb->len = sizeof(struct atmlec_msg);
 625        mesg = (struct atmlec_msg *)skb->data;
 626        memset(mesg, 0, sizeof(struct atmlec_msg));
 627        mesg->type = type;
 628        if (data != NULL)
 629                mesg->sizeoftlvs = data->len;
 630        if (mac_addr)
 631                memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
 632        else
 633                mesg->content.normal.targetless_le_arp = 1;
 634        if (atm_addr)
 635                memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
 636
 637        atm_force_charge(priv->lecd, skb->truesize);
 638        sk = sk_atm(priv->lecd);
 639        skb_queue_tail(&sk->sk_receive_queue, skb);
 640        sk->sk_data_ready(sk, skb->len);
 641
 642        if (data != NULL) {
 643                pr_debug("lec: about to send %d bytes of data\n", data->len);
 644                atm_force_charge(priv->lecd, data->truesize);
 645                skb_queue_tail(&sk->sk_receive_queue, data);
 646                sk->sk_data_ready(sk, skb->len);
 647        }
 648
 649        return 0;
 650}
 651
 652/* shamelessly stolen from drivers/net/net_init.c */
 653static int lec_change_mtu(struct net_device *dev, int new_mtu)
 654{
 655        if ((new_mtu < 68) || (new_mtu > 18190))
 656                return -EINVAL;
 657        dev->mtu = new_mtu;
 658        return 0;
 659}
 660
 661static void lec_set_multicast_list(struct net_device *dev)
 662{
 663        /*
 664         * by default, all multicast frames arrive over the bus.
 665         * eventually support selective multicast service
 666         */
 667        return;
 668}
 669
 670static const struct net_device_ops lec_netdev_ops = {
 671        .ndo_open               = lec_open,
 672        .ndo_stop               = lec_close,
 673        .ndo_start_xmit         = lec_start_xmit,
 674        .ndo_change_mtu         = lec_change_mtu,
 675        .ndo_tx_timeout         = lec_tx_timeout,
 676        .ndo_set_multicast_list = lec_set_multicast_list,
 677};
 678
 679
 680static void lec_init(struct net_device *dev)
 681{
 682        dev->netdev_ops = &lec_netdev_ops;
 683        printk("%s: Initialized!\n", dev->name);
 684}
 685
 686static const unsigned char lec_ctrl_magic[] = {
 687        0xff,
 688        0x00,
 689        0x01,
 690        0x01
 691};
 692
 693#define LEC_DATA_DIRECT_8023  2
 694#define LEC_DATA_DIRECT_8025  3
 695
 696static int lec_is_data_direct(struct atm_vcc *vcc)
 697{
 698        return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
 699                (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
 700}
 701
 702static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
 703{
 704        unsigned long flags;
 705        struct net_device *dev = (struct net_device *)vcc->proto_data;
 706        struct lec_priv *priv = netdev_priv(dev);
 707
 708#if DUMP_PACKETS >0
 709        int i = 0;
 710        char buf[300];
 711
 712        printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
 713               vcc->vpi, vcc->vci);
 714#endif
 715        if (!skb) {
 716                pr_debug("%s: null skb\n", dev->name);
 717                lec_vcc_close(priv, vcc);
 718                return;
 719        }
 720#if DUMP_PACKETS > 0
 721        printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
 722               skb->len, priv->lecid);
 723#if DUMP_PACKETS >= 2
 724        for (i = 0; i < skb->len && i < 99; i++) {
 725                sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 726        }
 727#elif DUMP_PACKETS >= 1
 728        for (i = 0; i < skb->len && i < 30; i++) {
 729                sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 730        }
 731#endif /* DUMP_PACKETS >= 1 */
 732        if (i == skb->len)
 733                printk("%s\n", buf);
 734        else
 735                printk("%s...\n", buf);
 736#endif /* DUMP_PACKETS > 0 */
 737        if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {        /* Control frame, to daemon */
 738                struct sock *sk = sk_atm(vcc);
 739
 740                pr_debug("%s: To daemon\n", dev->name);
 741                skb_queue_tail(&sk->sk_receive_queue, skb);
 742                sk->sk_data_ready(sk, skb->len);
 743        } else {                /* Data frame, queue to protocol handlers */
 744                struct lec_arp_table *entry;
 745                unsigned char *src, *dst;
 746
 747                atm_return(vcc, skb->truesize);
 748                if (*(__be16 *) skb->data == htons(priv->lecid) ||
 749                    !priv->lecd || !(dev->flags & IFF_UP)) {
 750                        /*
 751                         * Probably looping back, or if lecd is missing,
 752                         * lecd has gone down
 753                         */
 754                        pr_debug("Ignoring frame...\n");
 755                        dev_kfree_skb(skb);
 756                        return;
 757                }
 758#ifdef CONFIG_TR
 759                if (priv->is_trdev)
 760                        dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
 761                else
 762#endif
 763                        dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
 764
 765                /*
 766                 * If this is a Data Direct VCC, and the VCC does not match
 767                 * the LE_ARP cache entry, delete the LE_ARP cache entry.
 768                 */
 769                spin_lock_irqsave(&priv->lec_arp_lock, flags);
 770                if (lec_is_data_direct(vcc)) {
 771#ifdef CONFIG_TR
 772                        if (priv->is_trdev)
 773                                src =
 774                                    ((struct lecdatahdr_8025 *)skb->data)->
 775                                    h_source;
 776                        else
 777#endif
 778                                src =
 779                                    ((struct lecdatahdr_8023 *)skb->data)->
 780                                    h_source;
 781                        entry = lec_arp_find(priv, src);
 782                        if (entry && entry->vcc != vcc) {
 783                                lec_arp_remove(priv, entry);
 784                                lec_arp_put(entry);
 785                        }
 786                }
 787                spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 788
 789                if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
 790                    !priv->is_proxy &&  /* Proxy wants all the packets */
 791                    memcmp(dst, dev->dev_addr, dev->addr_len)) {
 792                        dev_kfree_skb(skb);
 793                        return;
 794                }
 795                if (!hlist_empty(&priv->lec_arp_empty_ones)) {
 796                        lec_arp_check_empties(priv, vcc, skb);
 797                }
 798                skb_pull(skb, 2);       /* skip lec_id */
 799#ifdef CONFIG_TR
 800                if (priv->is_trdev)
 801                        skb->protocol = tr_type_trans(skb, dev);
 802                else
 803#endif
 804                        skb->protocol = eth_type_trans(skb, dev);
 805                dev->stats.rx_packets++;
 806                dev->stats.rx_bytes += skb->len;
 807                memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
 808                netif_rx(skb);
 809        }
 810}
 811
 812static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 813{
 814        struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 815        struct net_device *dev = skb->dev;
 816
 817        if (vpriv == NULL) {
 818                printk("lec_pop(): vpriv = NULL!?!?!?\n");
 819                return;
 820        }
 821
 822        vpriv->old_pop(vcc, skb);
 823
 824        if (vpriv->xoff && atm_may_send(vcc, 0)) {
 825                vpriv->xoff = 0;
 826                if (netif_running(dev) && netif_queue_stopped(dev))
 827                        netif_wake_queue(dev);
 828        }
 829}
 830
 831static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
 832{
 833        struct lec_vcc_priv *vpriv;
 834        int bytes_left;
 835        struct atmlec_ioc ioc_data;
 836
 837        /* Lecd must be up in this case */
 838        bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
 839        if (bytes_left != 0) {
 840                printk
 841                    ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
 842                     bytes_left);
 843        }
 844        if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
 845            !dev_lec[ioc_data.dev_num])
 846                return -EINVAL;
 847        if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
 848                return -ENOMEM;
 849        vpriv->xoff = 0;
 850        vpriv->old_pop = vcc->pop;
 851        vcc->user_back = vpriv;
 852        vcc->pop = lec_pop;
 853        lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
 854                      &ioc_data, vcc, vcc->push);
 855        vcc->proto_data = dev_lec[ioc_data.dev_num];
 856        vcc->push = lec_push;
 857        return 0;
 858}
 859
 860static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
 861{
 862        if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
 863                return -EINVAL;
 864        vcc->proto_data = dev_lec[arg];
 865        return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]),
 866                                vcc);
 867}
 868
 869/* Initialize device. */
 870static int lecd_attach(struct atm_vcc *vcc, int arg)
 871{
 872        int i;
 873        struct lec_priv *priv;
 874
 875        if (arg < 0)
 876                i = 0;
 877        else
 878                i = arg;
 879#ifdef CONFIG_TR
 880        if (arg >= MAX_LEC_ITF)
 881                return -EINVAL;
 882#else                           /* Reserve the top NUM_TR_DEVS for TR */
 883        if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
 884                return -EINVAL;
 885#endif
 886        if (!dev_lec[i]) {
 887                int is_trdev, size;
 888
 889                is_trdev = 0;
 890                if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
 891                        is_trdev = 1;
 892
 893                size = sizeof(struct lec_priv);
 894#ifdef CONFIG_TR
 895                if (is_trdev)
 896                        dev_lec[i] = alloc_trdev(size);
 897                else
 898#endif
 899                        dev_lec[i] = alloc_etherdev(size);
 900                if (!dev_lec[i])
 901                        return -ENOMEM;
 902                snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
 903                if (register_netdev(dev_lec[i])) {
 904                        free_netdev(dev_lec[i]);
 905                        return -EINVAL;
 906                }
 907
 908                priv = netdev_priv(dev_lec[i]);
 909                priv->is_trdev = is_trdev;
 910                lec_init(dev_lec[i]);
 911        } else {
 912                priv = netdev_priv(dev_lec[i]);
 913                if (priv->lecd)
 914                        return -EADDRINUSE;
 915        }
 916        lec_arp_init(priv);
 917        priv->itfnum = i;       /* LANE2 addition */
 918        priv->lecd = vcc;
 919        vcc->dev = &lecatm_dev;
 920        vcc_insert_socket(sk_atm(vcc));
 921
 922        vcc->proto_data = dev_lec[i];
 923        set_bit(ATM_VF_META, &vcc->flags);
 924        set_bit(ATM_VF_READY, &vcc->flags);
 925
 926        /* Set default values to these variables */
 927        priv->maximum_unknown_frame_count = 1;
 928        priv->max_unknown_frame_time = (1 * HZ);
 929        priv->vcc_timeout_period = (1200 * HZ);
 930        priv->max_retry_count = 1;
 931        priv->aging_time = (300 * HZ);
 932        priv->forward_delay_time = (15 * HZ);
 933        priv->topology_change = 0;
 934        priv->arp_response_time = (1 * HZ);
 935        priv->flush_timeout = (4 * HZ);
 936        priv->path_switching_delay = (6 * HZ);
 937
 938        if (dev_lec[i]->flags & IFF_UP) {
 939                netif_start_queue(dev_lec[i]);
 940        }
 941        __module_get(THIS_MODULE);
 942        return i;
 943}
 944
 945#ifdef CONFIG_PROC_FS
 946static char *lec_arp_get_status_string(unsigned char status)
 947{
 948        static char *lec_arp_status_string[] = {
 949                "ESI_UNKNOWN       ",
 950                "ESI_ARP_PENDING   ",
 951                "ESI_VC_PENDING    ",
 952                "<Undefined>       ",
 953                "ESI_FLUSH_PENDING ",
 954                "ESI_FORWARD_DIRECT"
 955        };
 956
 957        if (status > ESI_FORWARD_DIRECT)
 958                status = 3;     /* ESI_UNDEFINED */
 959        return lec_arp_status_string[status];
 960}
 961
 962static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
 963{
 964        int i;
 965
 966        for (i = 0; i < ETH_ALEN; i++)
 967                seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
 968        seq_printf(seq, " ");
 969        for (i = 0; i < ATM_ESA_LEN; i++)
 970                seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
 971        seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
 972                   entry->flags & 0xffff);
 973        if (entry->vcc)
 974                seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
 975        else
 976                seq_printf(seq, "        ");
 977        if (entry->recv_vcc) {
 978                seq_printf(seq, "     %3d %3d", entry->recv_vcc->vpi,
 979                           entry->recv_vcc->vci);
 980        }
 981        seq_putc(seq, '\n');
 982}
 983
 984struct lec_state {
 985        unsigned long flags;
 986        struct lec_priv *locked;
 987        struct hlist_node *node;
 988        struct net_device *dev;
 989        int itf;
 990        int arp_table;
 991        int misc_table;
 992};
 993
 994static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
 995                          loff_t *l)
 996{
 997        struct hlist_node *e = state->node;
 998        struct lec_arp_table *tmp;
 999
1000        if (!e)
1001                e = tbl->first;
1002        if (e == SEQ_START_TOKEN) {
1003                e = tbl->first;
1004                --*l;
1005        }
1006
1007        hlist_for_each_entry_from(tmp, e, next) {
1008                if (--*l < 0)
1009                        break;
1010        }
1011        state->node = e;
1012
1013        return (*l < 0) ? state : NULL;
1014}
1015
1016static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1017                          struct lec_priv *priv)
1018{
1019        void *v = NULL;
1020        int p;
1021
1022        for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1023                v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1024                if (v)
1025                        break;
1026        }
1027        state->arp_table = p;
1028        return v;
1029}
1030
1031static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1032                           struct lec_priv *priv)
1033{
1034        struct hlist_head *lec_misc_tables[] = {
1035                &priv->lec_arp_empty_ones,
1036                &priv->lec_no_forward,
1037                &priv->mcast_fwds
1038        };
1039        void *v = NULL;
1040        int q;
1041
1042        for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1043                v = lec_tbl_walk(state, lec_misc_tables[q], l);
1044                if (v)
1045                        break;
1046        }
1047        state->misc_table = q;
1048        return v;
1049}
1050
1051static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1052                           struct lec_priv *priv)
1053{
1054        if (!state->locked) {
1055                state->locked = priv;
1056                spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1057        }
1058        if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1059                spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1060                state->locked = NULL;
1061                /* Partial state reset for the next time we get called */
1062                state->arp_table = state->misc_table = 0;
1063        }
1064        return state->locked;
1065}
1066
1067static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1068{
1069        struct net_device *dev;
1070        void *v;
1071
1072        dev = state->dev ? state->dev : dev_lec[state->itf];
1073        v = (dev && netdev_priv(dev)) ?
1074                lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
1075        if (!v && dev) {
1076                dev_put(dev);
1077                /* Partial state reset for the next time we get called */
1078                dev = NULL;
1079        }
1080        state->dev = dev;
1081        return v;
1082}
1083
1084static void *lec_get_idx(struct lec_state *state, loff_t l)
1085{
1086        void *v = NULL;
1087
1088        for (; state->itf < MAX_LEC_ITF; state->itf++) {
1089                v = lec_itf_walk(state, &l);
1090                if (v)
1091                        break;
1092        }
1093        return v;
1094}
1095
1096static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1097{
1098        struct lec_state *state = seq->private;
1099
1100        state->itf = 0;
1101        state->dev = NULL;
1102        state->locked = NULL;
1103        state->arp_table = 0;
1104        state->misc_table = 0;
1105        state->node = SEQ_START_TOKEN;
1106
1107        return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
1108}
1109
1110static void lec_seq_stop(struct seq_file *seq, void *v)
1111{
1112        struct lec_state *state = seq->private;
1113
1114        if (state->dev) {
1115                spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1116                                       state->flags);
1117                dev_put(state->dev);
1118        }
1119}
1120
1121static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1122{
1123        struct lec_state *state = seq->private;
1124
1125        v = lec_get_idx(state, 1);
1126        *pos += !!PTR_ERR(v);
1127        return v;
1128}
1129
1130static int lec_seq_show(struct seq_file *seq, void *v)
1131{
1132        static char lec_banner[] = "Itf  MAC          ATM destination"
1133            "                          Status            Flags "
1134            "VPI/VCI Recv VPI/VCI\n";
1135
1136        if (v == SEQ_START_TOKEN)
1137                seq_puts(seq, lec_banner);
1138        else {
1139                struct lec_state *state = seq->private;
1140                struct net_device *dev = state->dev;
1141                struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1142
1143                seq_printf(seq, "%s ", dev->name);
1144                lec_info(seq, entry);
1145        }
1146        return 0;
1147}
1148
1149static const struct seq_operations lec_seq_ops = {
1150        .start = lec_seq_start,
1151        .next = lec_seq_next,
1152        .stop = lec_seq_stop,
1153        .show = lec_seq_show,
1154};
1155
1156static int lec_seq_open(struct inode *inode, struct file *file)
1157{
1158        return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1159}
1160
1161static const struct file_operations lec_seq_fops = {
1162        .owner = THIS_MODULE,
1163        .open = lec_seq_open,
1164        .read = seq_read,
1165        .llseek = seq_lseek,
1166        .release = seq_release_private,
1167};
1168#endif
1169
1170static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1171{
1172        struct atm_vcc *vcc = ATM_SD(sock);
1173        int err = 0;
1174
1175        switch (cmd) {
1176        case ATMLEC_CTRL:
1177        case ATMLEC_MCAST:
1178        case ATMLEC_DATA:
1179                if (!capable(CAP_NET_ADMIN))
1180                        return -EPERM;
1181                break;
1182        default:
1183                return -ENOIOCTLCMD;
1184        }
1185
1186        switch (cmd) {
1187        case ATMLEC_CTRL:
1188                err = lecd_attach(vcc, (int)arg);
1189                if (err >= 0)
1190                        sock->state = SS_CONNECTED;
1191                break;
1192        case ATMLEC_MCAST:
1193                err = lec_mcast_attach(vcc, (int)arg);
1194                break;
1195        case ATMLEC_DATA:
1196                err = lec_vcc_attach(vcc, (void __user *)arg);
1197                break;
1198        }
1199
1200        return err;
1201}
1202
1203static struct atm_ioctl lane_ioctl_ops = {
1204        .owner = THIS_MODULE,
1205        .ioctl = lane_ioctl,
1206};
1207
1208static int __init lane_module_init(void)
1209{
1210#ifdef CONFIG_PROC_FS
1211        struct proc_dir_entry *p;
1212
1213        p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1214        if (!p) {
1215                printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n");
1216                return -ENOMEM;
1217        }
1218#endif
1219
1220        register_atm_ioctl(&lane_ioctl_ops);
1221        printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1222        return 0;
1223}
1224
1225static void __exit lane_module_cleanup(void)
1226{
1227        int i;
1228        struct lec_priv *priv;
1229
1230        remove_proc_entry("lec", atm_proc_root);
1231
1232        deregister_atm_ioctl(&lane_ioctl_ops);
1233
1234        for (i = 0; i < MAX_LEC_ITF; i++) {
1235                if (dev_lec[i] != NULL) {
1236                        priv = netdev_priv(dev_lec[i]);
1237                        unregister_netdev(dev_lec[i]);
1238                        free_netdev(dev_lec[i]);
1239                        dev_lec[i] = NULL;
1240                }
1241        }
1242
1243        return;
1244}
1245
1246module_init(lane_module_init);
1247module_exit(lane_module_cleanup);
1248
1249/*
1250 * LANE2: 3.1.3, LE_RESOLVE.request
1251 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1252 * If sizeoftlvs == NULL the default TLVs associated with with this
1253 * lec will be used.
1254 * If dst_mac == NULL, targetless LE_ARP will be sent
1255 */
1256static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1257                         u8 **tlvs, u32 *sizeoftlvs)
1258{
1259        unsigned long flags;
1260        struct lec_priv *priv = netdev_priv(dev);
1261        struct lec_arp_table *table;
1262        struct sk_buff *skb;
1263        int retval;
1264
1265        if (force == 0) {
1266                spin_lock_irqsave(&priv->lec_arp_lock, flags);
1267                table = lec_arp_find(priv, dst_mac);
1268                spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1269                if (table == NULL)
1270                        return -1;
1271
1272                *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1273                if (*tlvs == NULL)
1274                        return -1;
1275
1276                *sizeoftlvs = table->sizeoftlvs;
1277
1278                return 0;
1279        }
1280
1281        if (sizeoftlvs == NULL)
1282                retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1283
1284        else {
1285                skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1286                if (skb == NULL)
1287                        return -1;
1288                skb->len = *sizeoftlvs;
1289                skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1290                retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1291        }
1292        return retval;
1293}
1294
1295/*
1296 * LANE2: 3.1.4, LE_ASSOCIATE.request
1297 * Associate the *tlvs with the *lan_dst address.
1298 * Will overwrite any previous association
1299 * Returns 1 for success, 0 for failure (out of memory)
1300 *
1301 */
1302static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1303                               const u8 *tlvs, u32 sizeoftlvs)
1304{
1305        int retval;
1306        struct sk_buff *skb;
1307        struct lec_priv *priv = netdev_priv(dev);
1308
1309        if (compare_ether_addr(lan_dst, dev->dev_addr))
1310                return (0);     /* not our mac address */
1311
1312        kfree(priv->tlvs);      /* NULL if there was no previous association */
1313
1314        priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1315        if (priv->tlvs == NULL)
1316                return (0);
1317        priv->sizeoftlvs = sizeoftlvs;
1318
1319        skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1320        if (skb == NULL)
1321                return 0;
1322        skb->len = sizeoftlvs;
1323        skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1324        retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1325        if (retval != 0)
1326                printk("lec.c: lane2_associate_req() failed\n");
1327        /*
1328         * If the previous association has changed we must
1329         * somehow notify other LANE entities about the change
1330         */
1331        return (1);
1332}
1333
1334/*
1335 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1336 *
1337 */
1338static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1339                                const u8 *tlvs, u32 sizeoftlvs)
1340{
1341#if 0
1342        int i = 0;
1343#endif
1344        struct lec_priv *priv = netdev_priv(dev);
1345#if 0                           /*
1346                                 * Why have the TLVs in LE_ARP entries
1347                                 * since we do not use them? When you
1348                                 * uncomment this code, make sure the
1349                                 * TLVs get freed when entry is killed
1350                                 */
1351        struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1352
1353        if (entry == NULL)
1354                return;         /* should not happen */
1355
1356        kfree(entry->tlvs);
1357
1358        entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1359        if (entry->tlvs == NULL)
1360                return;
1361        entry->sizeoftlvs = sizeoftlvs;
1362#endif
1363#if 0
1364        printk("lec.c: lane2_associate_ind()\n");
1365        printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1366        while (i < sizeoftlvs)
1367                printk("%02x ", tlvs[i++]);
1368
1369        printk("\n");
1370#endif
1371
1372        /* tell MPOA about the TLVs we saw */
1373        if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1374                priv->lane2_ops->associate_indicator(dev, mac_addr,
1375                                                     tlvs, sizeoftlvs);
1376        }
1377        return;
1378}
1379
1380/*
1381 * Here starts what used to lec_arpc.c
1382 *
1383 * lec_arpc.c was added here when making
1384 * lane client modular. October 1997
1385 */
1386
1387#include <linux/types.h>
1388#include <linux/timer.h>
1389#include <asm/param.h>
1390#include <asm/atomic.h>
1391#include <linux/inetdevice.h>
1392#include <net/route.h>
1393
1394#if 0
1395#define pr_debug(format,args...)
1396/*
1397#define pr_debug printk
1398*/
1399#endif
1400#define DEBUG_ARP_TABLE 0
1401
1402#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1403
1404static void lec_arp_check_expire(struct work_struct *work);
1405static void lec_arp_expire_arp(unsigned long data);
1406
1407/*
1408 * Arp table funcs
1409 */
1410
1411#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1412
1413/*
1414 * Initialization of arp-cache
1415 */
1416static void lec_arp_init(struct lec_priv *priv)
1417{
1418        unsigned short i;
1419
1420        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1421                INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1422        }
1423        INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1424        INIT_HLIST_HEAD(&priv->lec_no_forward);
1425        INIT_HLIST_HEAD(&priv->mcast_fwds);
1426        spin_lock_init(&priv->lec_arp_lock);
1427        INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1428        schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1429}
1430
1431static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1432{
1433        if (entry->vcc) {
1434                struct atm_vcc *vcc = entry->vcc;
1435                struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1436                struct net_device *dev = (struct net_device *)vcc->proto_data;
1437
1438                vcc->pop = vpriv->old_pop;
1439                if (vpriv->xoff)
1440                        netif_wake_queue(dev);
1441                kfree(vpriv);
1442                vcc->user_back = NULL;
1443                vcc->push = entry->old_push;
1444                vcc_release_async(vcc, -EPIPE);
1445                entry->vcc = NULL;
1446        }
1447        if (entry->recv_vcc) {
1448                entry->recv_vcc->push = entry->old_recv_push;
1449                vcc_release_async(entry->recv_vcc, -EPIPE);
1450                entry->recv_vcc = NULL;
1451        }
1452}
1453
1454/*
1455 * Insert entry to lec_arp_table
1456 * LANE2: Add to the end of the list to satisfy 8.1.13
1457 */
1458static inline void
1459lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1460{
1461        struct hlist_head *tmp;
1462
1463        tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1464        hlist_add_head(&entry->next, tmp);
1465
1466        pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1467                0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1468                0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1469                0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1470}
1471
1472/*
1473 * Remove entry from lec_arp_table
1474 */
1475static int
1476lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1477{
1478        struct hlist_node *node;
1479        struct lec_arp_table *entry;
1480        int i, remove_vcc = 1;
1481
1482        if (!to_remove) {
1483                return -1;
1484        }
1485
1486        hlist_del(&to_remove->next);
1487        del_timer(&to_remove->timer);
1488
1489        /* If this is the only MAC connected to this VCC, also tear down the VCC */
1490        if (to_remove->status >= ESI_FLUSH_PENDING) {
1491                /*
1492                 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1493                 */
1494                for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1495                        hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1496                                if (memcmp(to_remove->atm_addr,
1497                                           entry->atm_addr, ATM_ESA_LEN) == 0) {
1498                                        remove_vcc = 0;
1499                                        break;
1500                                }
1501                        }
1502                }
1503                if (remove_vcc)
1504                        lec_arp_clear_vccs(to_remove);
1505        }
1506        skb_queue_purge(&to_remove->tx_wait);   /* FIXME: good place for this? */
1507
1508        pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1509                0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1510                0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1511                0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1512        return 0;
1513}
1514
1515#if DEBUG_ARP_TABLE
1516static char *get_status_string(unsigned char st)
1517{
1518        switch (st) {
1519        case ESI_UNKNOWN:
1520                return "ESI_UNKNOWN";
1521        case ESI_ARP_PENDING:
1522                return "ESI_ARP_PENDING";
1523        case ESI_VC_PENDING:
1524                return "ESI_VC_PENDING";
1525        case ESI_FLUSH_PENDING:
1526                return "ESI_FLUSH_PENDING";
1527        case ESI_FORWARD_DIRECT:
1528                return "ESI_FORWARD_DIRECT";
1529        default:
1530                return "<UNKNOWN>";
1531        }
1532}
1533
1534static void dump_arp_table(struct lec_priv *priv)
1535{
1536        struct hlist_node *node;
1537        struct lec_arp_table *rulla;
1538        char buf[256];
1539        int i, j, offset;
1540
1541        printk("Dump %p:\n", priv);
1542        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1543                hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1544                        offset = 0;
1545                        offset += sprintf(buf, "%d: %p\n", i, rulla);
1546                        offset += sprintf(buf + offset, "Mac:");
1547                        for (j = 0; j < ETH_ALEN; j++) {
1548                                offset += sprintf(buf + offset,
1549                                                  "%2.2x ",
1550                                                  rulla->mac_addr[j] & 0xff);
1551                        }
1552                        offset += sprintf(buf + offset, "Atm:");
1553                        for (j = 0; j < ATM_ESA_LEN; j++) {
1554                                offset += sprintf(buf + offset,
1555                                                  "%2.2x ",
1556                                                  rulla->atm_addr[j] & 0xff);
1557                        }
1558                        offset += sprintf(buf + offset,
1559                                          "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1560                                          rulla->vcc ? rulla->vcc->vpi : 0,
1561                                          rulla->vcc ? rulla->vcc->vci : 0,
1562                                          rulla->recv_vcc ? rulla->recv_vcc->
1563                                          vpi : 0,
1564                                          rulla->recv_vcc ? rulla->recv_vcc->
1565                                          vci : 0, rulla->last_used,
1566                                          rulla->timestamp, rulla->no_tries);
1567                        offset +=
1568                            sprintf(buf + offset,
1569                                    "Flags:%x, Packets_flooded:%x, Status: %s ",
1570                                    rulla->flags, rulla->packets_flooded,
1571                                    get_status_string(rulla->status));
1572                        printk("%s\n", buf);
1573                }
1574        }
1575
1576        if (!hlist_empty(&priv->lec_no_forward))
1577                printk("No forward\n");
1578        hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1579                offset = 0;
1580                offset += sprintf(buf + offset, "Mac:");
1581                for (j = 0; j < ETH_ALEN; j++) {
1582                        offset += sprintf(buf + offset, "%2.2x ",
1583                                          rulla->mac_addr[j] & 0xff);
1584                }
1585                offset += sprintf(buf + offset, "Atm:");
1586                for (j = 0; j < ATM_ESA_LEN; j++) {
1587                        offset += sprintf(buf + offset, "%2.2x ",
1588                                          rulla->atm_addr[j] & 0xff);
1589                }
1590                offset += sprintf(buf + offset,
1591                                  "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1592                                  rulla->vcc ? rulla->vcc->vpi : 0,
1593                                  rulla->vcc ? rulla->vcc->vci : 0,
1594                                  rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1595                                  rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1596                                  rulla->last_used,
1597                                  rulla->timestamp, rulla->no_tries);
1598                offset += sprintf(buf + offset,
1599                                  "Flags:%x, Packets_flooded:%x, Status: %s ",
1600                                  rulla->flags, rulla->packets_flooded,
1601                                  get_status_string(rulla->status));
1602                printk("%s\n", buf);
1603        }
1604
1605        if (!hlist_empty(&priv->lec_arp_empty_ones))
1606                printk("Empty ones\n");
1607        hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1608                offset = 0;
1609                offset += sprintf(buf + offset, "Mac:");
1610                for (j = 0; j < ETH_ALEN; j++) {
1611                        offset += sprintf(buf + offset, "%2.2x ",
1612                                          rulla->mac_addr[j] & 0xff);
1613                }
1614                offset += sprintf(buf + offset, "Atm:");
1615                for (j = 0; j < ATM_ESA_LEN; j++) {
1616                        offset += sprintf(buf + offset, "%2.2x ",
1617                                          rulla->atm_addr[j] & 0xff);
1618                }
1619                offset += sprintf(buf + offset,
1620                                  "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1621                                  rulla->vcc ? rulla->vcc->vpi : 0,
1622                                  rulla->vcc ? rulla->vcc->vci : 0,
1623                                  rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1624                                  rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1625                                  rulla->last_used,
1626                                  rulla->timestamp, rulla->no_tries);
1627                offset += sprintf(buf + offset,
1628                                  "Flags:%x, Packets_flooded:%x, Status: %s ",
1629                                  rulla->flags, rulla->packets_flooded,
1630                                  get_status_string(rulla->status));
1631                printk("%s", buf);
1632        }
1633
1634        if (!hlist_empty(&priv->mcast_fwds))
1635                printk("Multicast Forward VCCs\n");
1636        hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1637                offset = 0;
1638                offset += sprintf(buf + offset, "Mac:");
1639                for (j = 0; j < ETH_ALEN; j++) {
1640                        offset += sprintf(buf + offset, "%2.2x ",
1641                                          rulla->mac_addr[j] & 0xff);
1642                }
1643                offset += sprintf(buf + offset, "Atm:");
1644                for (j = 0; j < ATM_ESA_LEN; j++) {
1645                        offset += sprintf(buf + offset, "%2.2x ",
1646                                          rulla->atm_addr[j] & 0xff);
1647                }
1648                offset += sprintf(buf + offset,
1649                                  "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1650                                  rulla->vcc ? rulla->vcc->vpi : 0,
1651                                  rulla->vcc ? rulla->vcc->vci : 0,
1652                                  rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1653                                  rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1654                                  rulla->last_used,
1655                                  rulla->timestamp, rulla->no_tries);
1656                offset += sprintf(buf + offset,
1657                                  "Flags:%x, Packets_flooded:%x, Status: %s ",
1658                                  rulla->flags, rulla->packets_flooded,
1659                                  get_status_string(rulla->status));
1660                printk("%s\n", buf);
1661        }
1662
1663}
1664#else
1665#define dump_arp_table(priv) do { } while (0)
1666#endif
1667
1668/*
1669 * Destruction of arp-cache
1670 */
1671static void lec_arp_destroy(struct lec_priv *priv)
1672{
1673        unsigned long flags;
1674        struct hlist_node *node, *next;
1675        struct lec_arp_table *entry;
1676        int i;
1677
1678        cancel_rearming_delayed_work(&priv->lec_arp_work);
1679
1680        /*
1681         * Remove all entries
1682         */
1683
1684        spin_lock_irqsave(&priv->lec_arp_lock, flags);
1685        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1686                hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1687                        lec_arp_remove(priv, entry);
1688                        lec_arp_put(entry);
1689                }
1690                INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1691        }
1692
1693        hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1694                del_timer_sync(&entry->timer);
1695                lec_arp_clear_vccs(entry);
1696                hlist_del(&entry->next);
1697                lec_arp_put(entry);
1698        }
1699        INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1700
1701        hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1702                del_timer_sync(&entry->timer);
1703                lec_arp_clear_vccs(entry);
1704                hlist_del(&entry->next);
1705                lec_arp_put(entry);
1706        }
1707        INIT_HLIST_HEAD(&priv->lec_no_forward);
1708
1709        hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1710                /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1711                lec_arp_clear_vccs(entry);
1712                hlist_del(&entry->next);
1713                lec_arp_put(entry);
1714        }
1715        INIT_HLIST_HEAD(&priv->mcast_fwds);
1716        priv->mcast_vcc = NULL;
1717        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1718}
1719
1720/*
1721 * Find entry by mac_address
1722 */
1723static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1724                                          const unsigned char *mac_addr)
1725{
1726        struct hlist_node *node;
1727        struct hlist_head *head;
1728        struct lec_arp_table *entry;
1729
1730        pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1731                mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1732                mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1733
1734        head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1735        hlist_for_each_entry(entry, node, head, next) {
1736                if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1737                        return entry;
1738                }
1739        }
1740        return NULL;
1741}
1742
1743static struct lec_arp_table *make_entry(struct lec_priv *priv,
1744                                        const unsigned char *mac_addr)
1745{
1746        struct lec_arp_table *to_return;
1747
1748        to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1749        if (!to_return) {
1750                printk("LEC: Arp entry kmalloc failed\n");
1751                return NULL;
1752        }
1753        memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1754        INIT_HLIST_NODE(&to_return->next);
1755        setup_timer(&to_return->timer, lec_arp_expire_arp,
1756                        (unsigned long)to_return);
1757        to_return->last_used = jiffies;
1758        to_return->priv = priv;
1759        skb_queue_head_init(&to_return->tx_wait);
1760        atomic_set(&to_return->usage, 1);
1761        return to_return;
1762}
1763
1764/* Arp sent timer expired */
1765static void lec_arp_expire_arp(unsigned long data)
1766{
1767        struct lec_arp_table *entry;
1768
1769        entry = (struct lec_arp_table *)data;
1770
1771        pr_debug("lec_arp_expire_arp\n");
1772        if (entry->status == ESI_ARP_PENDING) {
1773                if (entry->no_tries <= entry->priv->max_retry_count) {
1774                        if (entry->is_rdesc)
1775                                send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1776                                             entry->mac_addr, NULL, NULL);
1777                        else
1778                                send_to_lecd(entry->priv, l_arp_xmt,
1779                                             entry->mac_addr, NULL, NULL);
1780                        entry->no_tries++;
1781                }
1782                mod_timer(&entry->timer, jiffies + (1 * HZ));
1783        }
1784}
1785
1786/* Unknown/unused vcc expire, remove associated entry */
1787static void lec_arp_expire_vcc(unsigned long data)
1788{
1789        unsigned long flags;
1790        struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1791        struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1792
1793        del_timer(&to_remove->timer);
1794
1795        pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1796                to_remove, priv,
1797                to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1798                to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1799
1800        spin_lock_irqsave(&priv->lec_arp_lock, flags);
1801        hlist_del(&to_remove->next);
1802        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1803
1804        lec_arp_clear_vccs(to_remove);
1805        lec_arp_put(to_remove);
1806}
1807
1808/*
1809 * Expire entries.
1810 * 1. Re-set timer
1811 * 2. For each entry, delete entries that have aged past the age limit.
1812 * 3. For each entry, depending on the status of the entry, perform
1813 *    the following maintenance.
1814 *    a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1815 *       tick_count is above the max_unknown_frame_time, clear
1816 *       the tick_count to zero and clear the packets_flooded counter
1817 *       to zero. This supports the packet rate limit per address
1818 *       while flooding unknowns.
1819 *    b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1820 *       than or equal to the path_switching_delay, change the status
1821 *       to ESI_FORWARD_DIRECT. This causes the flush period to end
1822 *       regardless of the progress of the flush protocol.
1823 */
1824static void lec_arp_check_expire(struct work_struct *work)
1825{
1826        unsigned long flags;
1827        struct lec_priv *priv =
1828                container_of(work, struct lec_priv, lec_arp_work.work);
1829        struct hlist_node *node, *next;
1830        struct lec_arp_table *entry;
1831        unsigned long now;
1832        unsigned long time_to_check;
1833        int i;
1834
1835        pr_debug("lec_arp_check_expire %p\n", priv);
1836        now = jiffies;
1837restart:
1838        spin_lock_irqsave(&priv->lec_arp_lock, flags);
1839        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1840                hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1841                        if ((entry->flags) & LEC_REMOTE_FLAG &&
1842                            priv->topology_change)
1843                                time_to_check = priv->forward_delay_time;
1844                        else
1845                                time_to_check = priv->aging_time;
1846
1847                        pr_debug("About to expire: %lx - %lx > %lx\n",
1848                                now, entry->last_used, time_to_check);
1849                        if (time_after(now, entry->last_used + time_to_check)
1850                            && !(entry->flags & LEC_PERMANENT_FLAG)
1851                            && !(entry->mac_addr[0] & 0x01)) {  /* LANE2: 7.1.20 */
1852                                /* Remove entry */
1853                                pr_debug("LEC:Entry timed out\n");
1854                                lec_arp_remove(priv, entry);
1855                                lec_arp_put(entry);
1856                        } else {
1857                                /* Something else */
1858                                if ((entry->status == ESI_VC_PENDING ||
1859                                     entry->status == ESI_ARP_PENDING)
1860                                    && time_after_eq(now,
1861                                                     entry->timestamp +
1862                                                     priv->
1863                                                     max_unknown_frame_time)) {
1864                                        entry->timestamp = jiffies;
1865                                        entry->packets_flooded = 0;
1866                                        if (entry->status == ESI_VC_PENDING)
1867                                                send_to_lecd(priv, l_svc_setup,
1868                                                             entry->mac_addr,
1869                                                             entry->atm_addr,
1870                                                             NULL);
1871                                }
1872                                if (entry->status == ESI_FLUSH_PENDING
1873                                    &&
1874                                    time_after_eq(now, entry->timestamp +
1875                                                  priv->path_switching_delay)) {
1876                                        struct sk_buff *skb;
1877                                        struct atm_vcc *vcc = entry->vcc;
1878
1879                                        lec_arp_hold(entry);
1880                                        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1881                                        while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1882                                                lec_send(vcc, skb);
1883                                        entry->last_used = jiffies;
1884                                        entry->status = ESI_FORWARD_DIRECT;
1885                                        lec_arp_put(entry);
1886                                        goto restart;
1887                                }
1888                        }
1889                }
1890        }
1891        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1892
1893        schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1894}
1895
1896/*
1897 * Try to find vcc where mac_address is attached.
1898 *
1899 */
1900static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1901                                       const unsigned char *mac_to_find, int is_rdesc,
1902                                       struct lec_arp_table **ret_entry)
1903{
1904        unsigned long flags;
1905        struct lec_arp_table *entry;
1906        struct atm_vcc *found;
1907
1908        if (mac_to_find[0] & 0x01) {
1909                switch (priv->lane_version) {
1910                case 1:
1911                        return priv->mcast_vcc;
1912                case 2: /* LANE2 wants arp for multicast addresses */
1913                        if (!compare_ether_addr(mac_to_find, bus_mac))
1914                                return priv->mcast_vcc;
1915                        break;
1916                default:
1917                        break;
1918                }
1919        }
1920
1921        spin_lock_irqsave(&priv->lec_arp_lock, flags);
1922        entry = lec_arp_find(priv, mac_to_find);
1923
1924        if (entry) {
1925                if (entry->status == ESI_FORWARD_DIRECT) {
1926                        /* Connection Ok */
1927                        entry->last_used = jiffies;
1928                        lec_arp_hold(entry);
1929                        *ret_entry = entry;
1930                        found = entry->vcc;
1931                        goto out;
1932                }
1933                /*
1934                 * If the LE_ARP cache entry is still pending, reset count to 0
1935                 * so another LE_ARP request can be made for this frame.
1936                 */
1937                if (entry->status == ESI_ARP_PENDING) {
1938                        entry->no_tries = 0;
1939                }
1940                /*
1941                 * Data direct VC not yet set up, check to see if the unknown
1942                 * frame count is greater than the limit. If the limit has
1943                 * not been reached, allow the caller to send packet to
1944                 * BUS.
1945                 */
1946                if (entry->status != ESI_FLUSH_PENDING &&
1947                    entry->packets_flooded <
1948                    priv->maximum_unknown_frame_count) {
1949                        entry->packets_flooded++;
1950                        pr_debug("LEC_ARP: Flooding..\n");
1951                        found = priv->mcast_vcc;
1952                        goto out;
1953                }
1954                /*
1955                 * We got here because entry->status == ESI_FLUSH_PENDING
1956                 * or BUS flood limit was reached for an entry which is
1957                 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1958                 */
1959                lec_arp_hold(entry);
1960                *ret_entry = entry;
1961                pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1962                        entry->vcc);
1963                found = NULL;
1964        } else {
1965                /* No matching entry was found */
1966                entry = make_entry(priv, mac_to_find);
1967                pr_debug("LEC_ARP: Making entry\n");
1968                if (!entry) {
1969                        found = priv->mcast_vcc;
1970                        goto out;
1971                }
1972                lec_arp_add(priv, entry);
1973                /* We want arp-request(s) to be sent */
1974                entry->packets_flooded = 1;
1975                entry->status = ESI_ARP_PENDING;
1976                entry->no_tries = 1;
1977                entry->last_used = entry->timestamp = jiffies;
1978                entry->is_rdesc = is_rdesc;
1979                if (entry->is_rdesc)
1980                        send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1981                                     NULL);
1982                else
1983                        send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1984                entry->timer.expires = jiffies + (1 * HZ);
1985                entry->timer.function = lec_arp_expire_arp;
1986                add_timer(&entry->timer);
1987                found = priv->mcast_vcc;
1988        }
1989
1990out:
1991        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1992        return found;
1993}
1994
1995static int
1996lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1997                unsigned long permanent)
1998{
1999        unsigned long flags;
2000        struct hlist_node *node, *next;
2001        struct lec_arp_table *entry;
2002        int i;
2003
2004        pr_debug("lec_addr_delete\n");
2005        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2006        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2007                hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2008                        if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2009                            && (permanent ||
2010                                !(entry->flags & LEC_PERMANENT_FLAG))) {
2011                                lec_arp_remove(priv, entry);
2012                                lec_arp_put(entry);
2013                        }
2014                        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2015                        return 0;
2016                }
2017        }
2018        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2019        return -1;
2020}
2021
2022/*
2023 * Notifies:  Response to arp_request (atm_addr != NULL)
2024 */
2025static void
2026lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
2027               const unsigned char *atm_addr, unsigned long remoteflag,
2028               unsigned int targetless_le_arp)
2029{
2030        unsigned long flags;
2031        struct hlist_node *node, *next;
2032        struct lec_arp_table *entry, *tmp;
2033        int i;
2034
2035        pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2036        pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2037                mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2038                mac_addr[4], mac_addr[5]);
2039
2040        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2041        entry = lec_arp_find(priv, mac_addr);
2042        if (entry == NULL && targetless_le_arp)
2043                goto out;       /*
2044                                 * LANE2: ignore targetless LE_ARPs for which
2045                                 * we have no entry in the cache. 7.1.30
2046                                 */
2047        if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2048                hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2049                        if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2050                                hlist_del(&entry->next);
2051                                del_timer(&entry->timer);
2052                                tmp = lec_arp_find(priv, mac_addr);
2053                                if (tmp) {
2054                                        del_timer(&tmp->timer);
2055                                        tmp->status = ESI_FORWARD_DIRECT;
2056                                        memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2057                                        tmp->vcc = entry->vcc;
2058                                        tmp->old_push = entry->old_push;
2059                                        tmp->last_used = jiffies;
2060                                        del_timer(&entry->timer);
2061                                        lec_arp_put(entry);
2062                                        entry = tmp;
2063                                } else {
2064                                        entry->status = ESI_FORWARD_DIRECT;
2065                                        memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2066                                        entry->last_used = jiffies;
2067                                        lec_arp_add(priv, entry);
2068                                }
2069                                if (remoteflag)
2070                                        entry->flags |= LEC_REMOTE_FLAG;
2071                                else
2072                                        entry->flags &= ~LEC_REMOTE_FLAG;
2073                                pr_debug("After update\n");
2074                                dump_arp_table(priv);
2075                                goto out;
2076                        }
2077                }
2078        }
2079
2080        entry = lec_arp_find(priv, mac_addr);
2081        if (!entry) {
2082                entry = make_entry(priv, mac_addr);
2083                if (!entry)
2084                        goto out;
2085                entry->status = ESI_UNKNOWN;
2086                lec_arp_add(priv, entry);
2087                /* Temporary, changes before end of function */
2088        }
2089        memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2090        del_timer(&entry->timer);
2091        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2092                hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2093                        if (entry != tmp &&
2094                            !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2095                                /* Vcc to this host exists */
2096                                if (tmp->status > ESI_VC_PENDING) {
2097                                        /*
2098                                         * ESI_FLUSH_PENDING,
2099                                         * ESI_FORWARD_DIRECT
2100                                         */
2101                                        entry->vcc = tmp->vcc;
2102                                        entry->old_push = tmp->old_push;
2103                                }
2104                                entry->status = tmp->status;
2105                                break;
2106                        }
2107                }
2108        }
2109        if (remoteflag)
2110                entry->flags |= LEC_REMOTE_FLAG;
2111        else
2112                entry->flags &= ~LEC_REMOTE_FLAG;
2113        if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2114                entry->status = ESI_VC_PENDING;
2115                send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2116        }
2117        pr_debug("After update2\n");
2118        dump_arp_table(priv);
2119out:
2120        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2121}
2122
2123/*
2124 * Notifies: Vcc setup ready
2125 */
2126static void
2127lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
2128              struct atm_vcc *vcc,
2129              void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2130{
2131        unsigned long flags;
2132        struct hlist_node *node;
2133        struct lec_arp_table *entry;
2134        int i, found_entry = 0;
2135
2136        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2137        if (ioc_data->receive == 2) {
2138                /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2139
2140                pr_debug("LEC_ARP: Attaching mcast forward\n");
2141#if 0
2142                entry = lec_arp_find(priv, bus_mac);
2143                if (!entry) {
2144                        printk("LEC_ARP: Multicast entry not found!\n");
2145                        goto out;
2146                }
2147                memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2148                entry->recv_vcc = vcc;
2149                entry->old_recv_push = old_push;
2150#endif
2151                entry = make_entry(priv, bus_mac);
2152                if (entry == NULL)
2153                        goto out;
2154                del_timer(&entry->timer);
2155                memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2156                entry->recv_vcc = vcc;
2157                entry->old_recv_push = old_push;
2158                hlist_add_head(&entry->next, &priv->mcast_fwds);
2159                goto out;
2160        } else if (ioc_data->receive == 1) {
2161                /*
2162                 * Vcc which we don't want to make default vcc,
2163                 * attach it anyway.
2164                 */
2165                pr_debug
2166                    ("LEC_ARP:Attaching data direct, not default: "
2167                     "%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",
2168                     ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2169                     ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2170                     ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2171                     ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2172                     ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2173                     ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2174                     ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2175                     ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2176                     ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2177                     ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2178                entry = make_entry(priv, bus_mac);
2179                if (entry == NULL)
2180                        goto out;
2181                memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2182                memset(entry->mac_addr, 0, ETH_ALEN);
2183                entry->recv_vcc = vcc;
2184                entry->old_recv_push = old_push;
2185                entry->status = ESI_UNKNOWN;
2186                entry->timer.expires = jiffies + priv->vcc_timeout_period;
2187                entry->timer.function = lec_arp_expire_vcc;
2188                hlist_add_head(&entry->next, &priv->lec_no_forward);
2189                add_timer(&entry->timer);
2190                dump_arp_table(priv);
2191                goto out;
2192        }
2193        pr_debug
2194            ("LEC_ARP:Attaching data direct, default: "
2195             "%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",
2196             ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2197             ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2198             ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2199             ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2200             ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2201             ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2202             ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2203             ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2204             ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2205             ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2206        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2207                hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2208                        if (memcmp
2209                            (ioc_data->atm_addr, entry->atm_addr,
2210                             ATM_ESA_LEN) == 0) {
2211                                pr_debug("LEC_ARP: Attaching data direct\n");
2212                                pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2213                                        entry->vcc ? entry->vcc->vci : 0,
2214                                        entry->recv_vcc ? entry->recv_vcc->
2215                                        vci : 0);
2216                                found_entry = 1;
2217                                del_timer(&entry->timer);
2218                                entry->vcc = vcc;
2219                                entry->old_push = old_push;
2220                                if (entry->status == ESI_VC_PENDING) {
2221                                        if (priv->maximum_unknown_frame_count
2222                                            == 0)
2223                                                entry->status =
2224                                                    ESI_FORWARD_DIRECT;
2225                                        else {
2226                                                entry->timestamp = jiffies;
2227                                                entry->status =
2228                                                    ESI_FLUSH_PENDING;
2229#if 0
2230                                                send_to_lecd(priv, l_flush_xmt,
2231                                                             NULL,
2232                                                             entry->atm_addr,
2233                                                             NULL);
2234#endif
2235                                        }
2236                                } else {
2237                                        /*
2238                                         * They were forming a connection
2239                                         * to us, and we to them. Our
2240                                         * ATM address is numerically lower
2241                                         * than theirs, so we make connection
2242                                         * we formed into default VCC (8.1.11).
2243                                         * Connection they made gets torn
2244                                         * down. This might confuse some
2245                                         * clients. Can be changed if
2246                                         * someone reports trouble...
2247                                         */
2248                                        ;
2249                                }
2250                        }
2251                }
2252        }
2253        if (found_entry) {
2254                pr_debug("After vcc was added\n");
2255                dump_arp_table(priv);
2256                goto out;
2257        }
2258        /*
2259         * Not found, snatch address from first data packet that arrives
2260         * from this vcc
2261         */
2262        entry = make_entry(priv, bus_mac);
2263        if (!entry)
2264                goto out;
2265        entry->vcc = vcc;
2266        entry->old_push = old_push;
2267        memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2268        memset(entry->mac_addr, 0, ETH_ALEN);
2269        entry->status = ESI_UNKNOWN;
2270        hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2271        entry->timer.expires = jiffies + priv->vcc_timeout_period;
2272        entry->timer.function = lec_arp_expire_vcc;
2273        add_timer(&entry->timer);
2274        pr_debug("After vcc was added\n");
2275        dump_arp_table(priv);
2276out:
2277        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2278}
2279
2280static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2281{
2282        unsigned long flags;
2283        struct hlist_node *node;
2284        struct lec_arp_table *entry;
2285        int i;
2286
2287        pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2288restart:
2289        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2290        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2291                hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2292                        if (entry->flush_tran_id == tran_id
2293                            && entry->status == ESI_FLUSH_PENDING) {
2294                                struct sk_buff *skb;
2295                                struct atm_vcc *vcc = entry->vcc;
2296
2297                                lec_arp_hold(entry);
2298                                spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2299                                while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2300                                        lec_send(vcc, skb);
2301                                entry->last_used = jiffies;
2302                                entry->status = ESI_FORWARD_DIRECT;
2303                                lec_arp_put(entry);
2304                                pr_debug("LEC_ARP: Flushed\n");
2305                                goto restart;
2306                        }
2307                }
2308        }
2309        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2310        dump_arp_table(priv);
2311}
2312
2313static void
2314lec_set_flush_tran_id(struct lec_priv *priv,
2315                      const unsigned char *atm_addr, unsigned long tran_id)
2316{
2317        unsigned long flags;
2318        struct hlist_node *node;
2319        struct lec_arp_table *entry;
2320        int i;
2321
2322        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2323        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2324                hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2325                        if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2326                                entry->flush_tran_id = tran_id;
2327                                pr_debug("Set flush transaction id to %lx for %p\n",
2328                                        tran_id, entry);
2329                        }
2330                }
2331        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2332}
2333
2334static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2335{
2336        unsigned long flags;
2337        unsigned char mac_addr[] = {
2338                0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2339        };
2340        struct lec_arp_table *to_add;
2341        struct lec_vcc_priv *vpriv;
2342        int err = 0;
2343
2344        if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2345                return -ENOMEM;
2346        vpriv->xoff = 0;
2347        vpriv->old_pop = vcc->pop;
2348        vcc->user_back = vpriv;
2349        vcc->pop = lec_pop;
2350        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2351        to_add = make_entry(priv, mac_addr);
2352        if (!to_add) {
2353                vcc->pop = vpriv->old_pop;
2354                kfree(vpriv);
2355                err = -ENOMEM;
2356                goto out;
2357        }
2358        memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2359        to_add->status = ESI_FORWARD_DIRECT;
2360        to_add->flags |= LEC_PERMANENT_FLAG;
2361        to_add->vcc = vcc;
2362        to_add->old_push = vcc->push;
2363        vcc->push = lec_push;
2364        priv->mcast_vcc = vcc;
2365        lec_arp_add(priv, to_add);
2366out:
2367        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2368        return err;
2369}
2370
2371static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2372{
2373        unsigned long flags;
2374        struct hlist_node *node, *next;
2375        struct lec_arp_table *entry;
2376        int i;
2377
2378        pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2379        dump_arp_table(priv);
2380
2381        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2382
2383        for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2384                hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2385                        if (vcc == entry->vcc) {
2386                                lec_arp_remove(priv, entry);
2387                                lec_arp_put(entry);
2388                                if (priv->mcast_vcc == vcc) {
2389                                        priv->mcast_vcc = NULL;
2390                                }
2391                        }
2392                }
2393        }
2394
2395        hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2396                if (entry->vcc == vcc) {
2397                        lec_arp_clear_vccs(entry);
2398                        del_timer(&entry->timer);
2399                        hlist_del(&entry->next);
2400                        lec_arp_put(entry);
2401                }
2402        }
2403
2404        hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2405                if (entry->recv_vcc == vcc) {
2406                        lec_arp_clear_vccs(entry);
2407                        del_timer(&entry->timer);
2408                        hlist_del(&entry->next);
2409                        lec_arp_put(entry);
2410                }
2411        }
2412
2413        hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2414                if (entry->recv_vcc == vcc) {
2415                        lec_arp_clear_vccs(entry);
2416                        /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2417                        hlist_del(&entry->next);
2418                        lec_arp_put(entry);
2419                }
2420        }
2421
2422        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2423        dump_arp_table(priv);
2424}
2425
2426static void
2427lec_arp_check_empties(struct lec_priv *priv,
2428                      struct atm_vcc *vcc, struct sk_buff *skb)
2429{
2430        unsigned long flags;
2431        struct hlist_node *node, *next;
2432        struct lec_arp_table *entry, *tmp;
2433        struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2434        unsigned char *src;
2435#ifdef CONFIG_TR
2436        struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2437
2438        if (priv->is_trdev)
2439                src = tr_hdr->h_source;
2440        else
2441#endif
2442                src = hdr->h_source;
2443
2444        spin_lock_irqsave(&priv->lec_arp_lock, flags);
2445        hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2446                if (vcc == entry->vcc) {
2447                        del_timer(&entry->timer);
2448                        memcpy(entry->mac_addr, src, ETH_ALEN);
2449                        entry->status = ESI_FORWARD_DIRECT;
2450                        entry->last_used = jiffies;
2451                        /* We might have got an entry */
2452                        if ((tmp = lec_arp_find(priv, src))) {
2453                                lec_arp_remove(priv, tmp);
2454                                lec_arp_put(tmp);
2455                        }
2456                        hlist_del(&entry->next);
2457                        lec_arp_add(priv, entry);
2458                        goto out;
2459                }
2460        }
2461        pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2462out:
2463        spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2464}
2465
2466MODULE_LICENSE("GPL");
2467