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