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 40 static 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 62 static int lec_open(struct net_device *dev); 63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); 64 static int lec_close(struct net_device *dev); 65 static struct net_device_stats *lec_get_stats(struct net_device *dev); 66 static void lec_init(struct net_device *dev); 67 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 68 unsigned char *mac_addr); 69 static int lec_arp_remove(struct lec_priv *priv, 70 struct lec_arp_table *to_remove); 71 /* LANE2 functions */ 72 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address, 73 u8 *tlvs, u32 sizeoftlvs); 74 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 75 u8 **tlvs, u32 *sizeoftlvs); 76 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 77 u8 *tlvs, u32 sizeoftlvs); 78 79 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 80 unsigned long permanent); 81 static void lec_arp_check_empties(struct lec_priv *priv, 82 struct atm_vcc *vcc, struct sk_buff *skb); 83 static void lec_arp_destroy(struct lec_priv *priv); 84 static void lec_arp_init(struct lec_priv *priv); 85 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 86 unsigned char *mac_to_find, 87 int is_rdesc, 88 struct lec_arp_table **ret_entry); 89 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 90 unsigned char *atm_addr, unsigned long remoteflag, 91 unsigned int targetless_le_arp); 92 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); 93 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); 94 static void lec_set_flush_tran_id(struct lec_priv *priv, 95 unsigned char *atm_addr, 96 unsigned long tran_id); 97 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 98 struct atm_vcc *vcc, 99 void (*old_push) (struct atm_vcc *vcc, 100 struct sk_buff *skb)); 101 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); 102 103 /* must be done under lec_arp_lock */ 104 static inline void lec_arp_hold(struct lec_arp_table *entry) 105 { 106 atomic_inc(&entry->usage); 107 } 108 109 static inline void lec_arp_put(struct lec_arp_table *entry) 110 { 111 if (atomic_dec_and_test(&entry->usage)) 112 kfree(entry); 113 } 114 115 116 static struct lane2_ops lane2_ops = { 117 lane2_resolve, /* resolve, spec 3.1.3 */ 118 lane2_associate_req, /* associate_req, spec 3.1.4 */ 119 NULL /* associate indicator, spec 3.1.5 */ 120 }; 121 122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 123 124 /* Device structures */ 125 static struct net_device *dev_lec[MAX_LEC_ITF]; 126 127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) 129 { 130 struct ethhdr *eth; 131 char *buff; 132 struct lec_priv *priv; 133 134 /* 135 * Check if this is a BPDU. If so, ask zeppelin to send 136 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit 137 * as the Config BPDU has 138 */ 139 eth = (struct ethhdr *)skb->data; 140 buff = skb->data + skb->dev->hard_header_len; 141 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { 142 struct sock *sk; 143 struct sk_buff *skb2; 144 struct atmlec_msg *mesg; 145 146 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 147 if (skb2 == NULL) 148 return; 149 skb2->len = sizeof(struct atmlec_msg); 150 mesg = (struct atmlec_msg *)skb2->data; 151 mesg->type = l_topology_change; 152 buff += 4; 153 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ 154 155 priv = (struct lec_priv *)dev->priv; 156 atm_force_charge(priv->lecd, skb2->truesize); 157 sk = sk_atm(priv->lecd); 158 skb_queue_tail(&sk->sk_receive_queue, skb2); 159 sk->sk_data_ready(sk, skb2->len); 160 } 161 162 return; 163 } 164 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 165 166 /* 167 * Modelled after tr_type_trans 168 * All multicast and ARE or STE frames go to BUS. 169 * Non source routed frames go by destination address. 170 * Last hop source routed frames go by destination address. 171 * Not last hop source routed frames go by _next_ route descriptor. 172 * Returns pointer to destination MAC address or fills in rdesc 173 * and returns NULL. 174 */ 175 #ifdef CONFIG_TR 176 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) 177 { 178 struct trh_hdr *trh; 179 int riflen, num_rdsc; 180 181 trh = (struct trh_hdr *)packet; 182 if (trh->daddr[0] & (uint8_t) 0x80) 183 return bus_mac; /* multicast */ 184 185 if (trh->saddr[0] & TR_RII) { 186 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; 187 if ((ntohs(trh->rcf) >> 13) != 0) 188 return bus_mac; /* ARE or STE */ 189 } else 190 return trh->daddr; /* not source routed */ 191 192 if (riflen < 6) 193 return trh->daddr; /* last hop, source routed */ 194 195 /* riflen is 6 or more, packet has more than one route descriptor */ 196 num_rdsc = (riflen / 2) - 1; 197 memset(rdesc, 0, ETH_ALEN); 198 /* offset 4 comes from LAN destination field in LE control frames */ 199 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) 200 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); 201 else { 202 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); 203 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); 204 } 205 206 return NULL; 207 } 208 #endif /* CONFIG_TR */ 209 210 /* 211 * Open/initialize the netdevice. This is called (in the current kernel) 212 * sometime after booting when the 'ifconfig' program is run. 213 * 214 * This routine should set everything up anew at each open, even 215 * registers that "should" only need to be set once at boot, so that 216 * there is non-reboot way to recover if something goes wrong. 217 */ 218 219 static int lec_open(struct net_device *dev) 220 { 221 struct lec_priv *priv = (struct lec_priv *)dev->priv; 222 223 netif_start_queue(dev); 224 memset(&priv->stats, 0, sizeof(struct net_device_stats)); 225 226 return 0; 227 } 228 229 static __inline__ void 230 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) 231 { 232 ATM_SKB(skb)->vcc = vcc; 233 ATM_SKB(skb)->atm_options = vcc->atm_options; 234 235 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 236 if (vcc->send(vcc, skb) < 0) { 237 priv->stats.tx_dropped++; 238 return; 239 } 240 241 priv->stats.tx_packets++; 242 priv->stats.tx_bytes += skb->len; 243 } 244 245 static void lec_tx_timeout(struct net_device *dev) 246 { 247 printk(KERN_INFO "%s: tx timeout\n", dev->name); 248 dev->trans_start = jiffies; 249 netif_wake_queue(dev); 250 } 251 252 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev) 253 { 254 struct sk_buff *skb2; 255 struct lec_priv *priv = (struct lec_priv *)dev->priv; 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 DECLARE_MAC_BUF(mac); 270 271 pr_debug("lec_start_xmit called\n"); 272 if (!priv->lecd) { 273 printk("%s:No lecd attached\n", dev->name); 274 priv->stats.tx_errors++; 275 netif_stop_queue(dev); 276 return -EUNATCH; 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 0; 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 0; 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 priv->stats.tx_dropped++; 350 return 0; 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 %s\n", 378 print_mac(mac, lec_h->h_dest)); 379 skb_queue_tail(&entry->tx_wait, skb); 380 } else { 381 pr_debug 382 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", 383 dev->name); 384 pr_debug("MAC address %s\n", 385 print_mac(mac, lec_h->h_dest)); 386 priv->stats.tx_dropped++; 387 dev_kfree_skb(skb); 388 } 389 goto out; 390 } 391 #if DUMP_PACKETS > 0 392 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); 393 #endif /* DUMP_PACKETS > 0 */ 394 395 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { 396 pr_debug("lec.c: emptying tx queue, "); 397 pr_debug("MAC address %s\n", 398 print_mac(mac, lec_h->h_dest)); 399 lec_send(vcc, skb2, priv); 400 } 401 402 lec_send(vcc, skb, priv); 403 404 if (!atm_may_send(vcc, 0)) { 405 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 406 407 vpriv->xoff = 1; 408 netif_stop_queue(dev); 409 410 /* 411 * vcc->pop() might have occurred in between, making 412 * the vcc usuable again. Since xmit is serialized, 413 * this is the only situation we have to re-test. 414 */ 415 416 if (atm_may_send(vcc, 0)) 417 netif_wake_queue(dev); 418 } 419 420 out: 421 if (entry) 422 lec_arp_put(entry); 423 dev->trans_start = jiffies; 424 return 0; 425 } 426 427 /* The inverse routine to net_open(). */ 428 static int lec_close(struct net_device *dev) 429 { 430 netif_stop_queue(dev); 431 return 0; 432 } 433 434 /* 435 * Get the current statistics. 436 * This may be called with the card open or closed. 437 */ 438 static struct net_device_stats *lec_get_stats(struct net_device *dev) 439 { 440 return &((struct lec_priv *)dev->priv)->stats; 441 } 442 443 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) 444 { 445 unsigned long flags; 446 struct net_device *dev = (struct net_device *)vcc->proto_data; 447 struct lec_priv *priv = (struct lec_priv *)dev->priv; 448 struct atmlec_msg *mesg; 449 struct lec_arp_table *entry; 450 int i; 451 char *tmp; /* FIXME */ 452 DECLARE_MAC_BUF(mac); 453 454 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 455 mesg = (struct atmlec_msg *)skb->data; 456 tmp = skb->data; 457 tmp += sizeof(struct atmlec_msg); 458 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); 459 switch (mesg->type) { 460 case l_set_mac_addr: 461 for (i = 0; i < 6; i++) { 462 dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; 463 } 464 break; 465 case l_del_mac_addr: 466 for (i = 0; i < 6; i++) { 467 dev->dev_addr[i] = 0; 468 } 469 break; 470 case l_addr_delete: 471 lec_addr_delete(priv, mesg->content.normal.atm_addr, 472 mesg->content.normal.flag); 473 break; 474 case l_topology_change: 475 priv->topology_change = mesg->content.normal.flag; 476 break; 477 case l_flush_complete: 478 lec_flush_complete(priv, mesg->content.normal.flag); 479 break; 480 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ 481 spin_lock_irqsave(&priv->lec_arp_lock, flags); 482 entry = lec_arp_find(priv, mesg->content.normal.mac_addr); 483 lec_arp_remove(priv, entry); 484 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 485 486 if (mesg->content.normal.no_source_le_narp) 487 break; 488 /* FALL THROUGH */ 489 case l_arp_update: 490 lec_arp_update(priv, mesg->content.normal.mac_addr, 491 mesg->content.normal.atm_addr, 492 mesg->content.normal.flag, 493 mesg->content.normal.targetless_le_arp); 494 pr_debug("lec: in l_arp_update\n"); 495 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ 496 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n", 497 mesg->sizeoftlvs); 498 lane2_associate_ind(dev, mesg->content.normal.mac_addr, 499 tmp, mesg->sizeoftlvs); 500 } 501 break; 502 case l_config: 503 priv->maximum_unknown_frame_count = 504 mesg->content.config.maximum_unknown_frame_count; 505 priv->max_unknown_frame_time = 506 (mesg->content.config.max_unknown_frame_time * HZ); 507 priv->max_retry_count = mesg->content.config.max_retry_count; 508 priv->aging_time = (mesg->content.config.aging_time * HZ); 509 priv->forward_delay_time = 510 (mesg->content.config.forward_delay_time * HZ); 511 priv->arp_response_time = 512 (mesg->content.config.arp_response_time * HZ); 513 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); 514 priv->path_switching_delay = 515 (mesg->content.config.path_switching_delay * HZ); 516 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ 517 priv->lane2_ops = NULL; 518 if (priv->lane_version > 1) 519 priv->lane2_ops = &lane2_ops; 520 if (dev->change_mtu(dev, mesg->content.config.mtu)) 521 printk("%s: change_mtu to %d failed\n", dev->name, 522 mesg->content.config.mtu); 523 priv->is_proxy = mesg->content.config.is_proxy; 524 break; 525 case l_flush_tran_id: 526 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, 527 mesg->content.normal.flag); 528 break; 529 case l_set_lecid: 530 priv->lecid = 531 (unsigned short)(0xffff & mesg->content.normal.flag); 532 break; 533 case l_should_bridge: 534 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 535 { 536 struct net_bridge_fdb_entry *f; 537 538 pr_debug 539 ("%s: bridge zeppelin asks about %s\n", 540 dev->name, 541 print_mac(mac, mesg->content.proxy.mac_addr)); 542 543 if (br_fdb_get_hook == NULL || dev->br_port == NULL) 544 break; 545 546 f = br_fdb_get_hook(dev->br_port->br, 547 mesg->content.proxy.mac_addr); 548 if (f != NULL && f->dst->dev != dev 549 && f->dst->state == BR_STATE_FORWARDING) { 550 /* hit from bridge table, send LE_ARP_RESPONSE */ 551 struct sk_buff *skb2; 552 struct sock *sk; 553 554 pr_debug 555 ("%s: entry found, responding to zeppelin\n", 556 dev->name); 557 skb2 = 558 alloc_skb(sizeof(struct atmlec_msg), 559 GFP_ATOMIC); 560 if (skb2 == NULL) { 561 br_fdb_put_hook(f); 562 break; 563 } 564 skb2->len = sizeof(struct atmlec_msg); 565 skb_copy_to_linear_data(skb2, mesg, 566 sizeof(*mesg)); 567 atm_force_charge(priv->lecd, skb2->truesize); 568 sk = sk_atm(priv->lecd); 569 skb_queue_tail(&sk->sk_receive_queue, skb2); 570 sk->sk_data_ready(sk, skb2->len); 571 } 572 if (f != NULL) 573 br_fdb_put_hook(f); 574 } 575 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 576 break; 577 default: 578 printk("%s: Unknown message type %d\n", dev->name, mesg->type); 579 dev_kfree_skb(skb); 580 return -EINVAL; 581 } 582 dev_kfree_skb(skb); 583 return 0; 584 } 585 586 static void lec_atm_close(struct atm_vcc *vcc) 587 { 588 struct sk_buff *skb; 589 struct net_device *dev = (struct net_device *)vcc->proto_data; 590 struct lec_priv *priv = (struct lec_priv *)dev->priv; 591 592 priv->lecd = NULL; 593 /* Do something needful? */ 594 595 netif_stop_queue(dev); 596 lec_arp_destroy(priv); 597 598 if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) 599 printk("%s lec_atm_close: closing with messages pending\n", 600 dev->name); 601 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { 602 atm_return(vcc, skb->truesize); 603 dev_kfree_skb(skb); 604 } 605 606 printk("%s: Shut down!\n", dev->name); 607 module_put(THIS_MODULE); 608 } 609 610 static struct atmdev_ops lecdev_ops = { 611 .close = lec_atm_close, 612 .send = lec_atm_send 613 }; 614 615 static struct atm_dev lecatm_dev = { 616 .ops = &lecdev_ops, 617 .type = "lec", 618 .number = 999, /* dummy device number */ 619 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) 620 }; 621 622 /* 623 * LANE2: new argument struct sk_buff *data contains 624 * the LE_ARP based TLVs introduced in the LANE2 spec 625 */ 626 static int 627 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, 628 unsigned char *mac_addr, unsigned char *atm_addr, 629 struct sk_buff *data) 630 { 631 struct sock *sk; 632 struct sk_buff *skb; 633 struct atmlec_msg *mesg; 634 635 if (!priv || !priv->lecd) { 636 return -1; 637 } 638 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 639 if (!skb) 640 return -1; 641 skb->len = sizeof(struct atmlec_msg); 642 mesg = (struct atmlec_msg *)skb->data; 643 memset(mesg, 0, sizeof(struct atmlec_msg)); 644 mesg->type = type; 645 if (data != NULL) 646 mesg->sizeoftlvs = data->len; 647 if (mac_addr) 648 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); 649 else 650 mesg->content.normal.targetless_le_arp = 1; 651 if (atm_addr) 652 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); 653 654 atm_force_charge(priv->lecd, skb->truesize); 655 sk = sk_atm(priv->lecd); 656 skb_queue_tail(&sk->sk_receive_queue, skb); 657 sk->sk_data_ready(sk, skb->len); 658 659 if (data != NULL) { 660 pr_debug("lec: about to send %d bytes of data\n", data->len); 661 atm_force_charge(priv->lecd, data->truesize); 662 skb_queue_tail(&sk->sk_receive_queue, data); 663 sk->sk_data_ready(sk, skb->len); 664 } 665 666 return 0; 667 } 668 669 /* shamelessly stolen from drivers/net/net_init.c */ 670 static int lec_change_mtu(struct net_device *dev, int new_mtu) 671 { 672 if ((new_mtu < 68) || (new_mtu > 18190)) 673 return -EINVAL; 674 dev->mtu = new_mtu; 675 return 0; 676 } 677 678 static void lec_set_multicast_list(struct net_device *dev) 679 { 680 /* 681 * by default, all multicast frames arrive over the bus. 682 * eventually support selective multicast service 683 */ 684 return; 685 } 686 687 static void lec_init(struct net_device *dev) 688 { 689 dev->change_mtu = lec_change_mtu; 690 dev->open = lec_open; 691 dev->stop = lec_close; 692 dev->hard_start_xmit = lec_start_xmit; 693 dev->tx_timeout = lec_tx_timeout; 694 695 dev->get_stats = lec_get_stats; 696 dev->set_multicast_list = lec_set_multicast_list; 697 dev->do_ioctl = NULL; 698 printk("%s: Initialized!\n", dev->name); 699 return; 700 } 701 702 static unsigned char lec_ctrl_magic[] = { 703 0xff, 704 0x00, 705 0x01, 706 0x01 707 }; 708 709 #define LEC_DATA_DIRECT_8023 2 710 #define LEC_DATA_DIRECT_8025 3 711 712 static int lec_is_data_direct(struct atm_vcc *vcc) 713 { 714 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || 715 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); 716 } 717 718 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 719 { 720 unsigned long flags; 721 struct net_device *dev = (struct net_device *)vcc->proto_data; 722 struct lec_priv *priv = (struct lec_priv *)dev->priv; 723 724 #if DUMP_PACKETS >0 725 int i = 0; 726 char buf[300]; 727 728 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, 729 vcc->vpi, vcc->vci); 730 #endif 731 if (!skb) { 732 pr_debug("%s: null skb\n", dev->name); 733 lec_vcc_close(priv, vcc); 734 return; 735 } 736 #if DUMP_PACKETS > 0 737 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, 738 skb->len, priv->lecid); 739 #if DUMP_PACKETS >= 2 740 for (i = 0; i < skb->len && i < 99; i++) { 741 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 742 } 743 #elif DUMP_PACKETS >= 1 744 for (i = 0; i < skb->len && i < 30; i++) { 745 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 746 } 747 #endif /* DUMP_PACKETS >= 1 */ 748 if (i == skb->len) 749 printk("%s\n", buf); 750 else 751 printk("%s...\n", buf); 752 #endif /* DUMP_PACKETS > 0 */ 753 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ 754 struct sock *sk = sk_atm(vcc); 755 756 pr_debug("%s: To daemon\n", dev->name); 757 skb_queue_tail(&sk->sk_receive_queue, skb); 758 sk->sk_data_ready(sk, skb->len); 759 } else { /* Data frame, queue to protocol handlers */ 760 struct lec_arp_table *entry; 761 unsigned char *src, *dst; 762 763 atm_return(vcc, skb->truesize); 764 if (*(__be16 *) skb->data == htons(priv->lecid) || 765 !priv->lecd || !(dev->flags & IFF_UP)) { 766 /* 767 * Probably looping back, or if lecd is missing, 768 * lecd has gone down 769 */ 770 pr_debug("Ignoring frame...\n"); 771 dev_kfree_skb(skb); 772 return; 773 } 774 #ifdef CONFIG_TR 775 if (priv->is_trdev) 776 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; 777 else 778 #endif 779 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; 780 781 /* 782 * If this is a Data Direct VCC, and the VCC does not match 783 * the LE_ARP cache entry, delete the LE_ARP cache entry. 784 */ 785 spin_lock_irqsave(&priv->lec_arp_lock, flags); 786 if (lec_is_data_direct(vcc)) { 787 #ifdef CONFIG_TR 788 if (priv->is_trdev) 789 src = 790 ((struct lecdatahdr_8025 *)skb->data)-> 791 h_source; 792 else 793 #endif 794 src = 795 ((struct lecdatahdr_8023 *)skb->data)-> 796 h_source; 797 entry = lec_arp_find(priv, src); 798 if (entry && entry->vcc != vcc) { 799 lec_arp_remove(priv, entry); 800 lec_arp_put(entry); 801 } 802 } 803 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 804 805 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ 806 !priv->is_proxy && /* Proxy wants all the packets */ 807 memcmp(dst, dev->dev_addr, dev->addr_len)) { 808 dev_kfree_skb(skb); 809 return; 810 } 811 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 812 lec_arp_check_empties(priv, vcc, skb); 813 } 814 skb_pull(skb, 2); /* skip lec_id */ 815 #ifdef CONFIG_TR 816 if (priv->is_trdev) 817 skb->protocol = tr_type_trans(skb, dev); 818 else 819 #endif 820 skb->protocol = eth_type_trans(skb, dev); 821 priv->stats.rx_packets++; 822 priv->stats.rx_bytes += skb->len; 823 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 824 netif_rx(skb); 825 } 826 } 827 828 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 829 { 830 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 831 struct net_device *dev = skb->dev; 832 833 if (vpriv == NULL) { 834 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 835 return; 836 } 837 838 vpriv->old_pop(vcc, skb); 839 840 if (vpriv->xoff && atm_may_send(vcc, 0)) { 841 vpriv->xoff = 0; 842 if (netif_running(dev) && netif_queue_stopped(dev)) 843 netif_wake_queue(dev); 844 } 845 } 846 847 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 848 { 849 struct lec_vcc_priv *vpriv; 850 int bytes_left; 851 struct atmlec_ioc ioc_data; 852 853 /* Lecd must be up in this case */ 854 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 855 if (bytes_left != 0) { 856 printk 857 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 858 bytes_left); 859 } 860 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 861 !dev_lec[ioc_data.dev_num]) 862 return -EINVAL; 863 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 864 return -ENOMEM; 865 vpriv->xoff = 0; 866 vpriv->old_pop = vcc->pop; 867 vcc->user_back = vpriv; 868 vcc->pop = lec_pop; 869 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, 870 &ioc_data, vcc, vcc->push); 871 vcc->proto_data = dev_lec[ioc_data.dev_num]; 872 vcc->push = lec_push; 873 return 0; 874 } 875 876 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 877 { 878 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 879 return -EINVAL; 880 vcc->proto_data = dev_lec[arg]; 881 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); 882 } 883 884 /* Initialize device. */ 885 static int lecd_attach(struct atm_vcc *vcc, int arg) 886 { 887 int i; 888 struct lec_priv *priv; 889 890 if (arg < 0) 891 i = 0; 892 else 893 i = arg; 894 #ifdef CONFIG_TR 895 if (arg >= MAX_LEC_ITF) 896 return -EINVAL; 897 #else /* Reserve the top NUM_TR_DEVS for TR */ 898 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 899 return -EINVAL; 900 #endif 901 if (!dev_lec[i]) { 902 int is_trdev, size; 903 904 is_trdev = 0; 905 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 906 is_trdev = 1; 907 908 size = sizeof(struct lec_priv); 909 #ifdef CONFIG_TR 910 if (is_trdev) 911 dev_lec[i] = alloc_trdev(size); 912 else 913 #endif 914 dev_lec[i] = alloc_etherdev(size); 915 if (!dev_lec[i]) 916 return -ENOMEM; 917 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 918 if (register_netdev(dev_lec[i])) { 919 free_netdev(dev_lec[i]); 920 return -EINVAL; 921 } 922 923 priv = dev_lec[i]->priv; 924 priv->is_trdev = is_trdev; 925 lec_init(dev_lec[i]); 926 } else { 927 priv = dev_lec[i]->priv; 928 if (priv->lecd) 929 return -EADDRINUSE; 930 } 931 lec_arp_init(priv); 932 priv->itfnum = i; /* LANE2 addition */ 933 priv->lecd = vcc; 934 vcc->dev = &lecatm_dev; 935 vcc_insert_socket(sk_atm(vcc)); 936 937 vcc->proto_data = dev_lec[i]; 938 set_bit(ATM_VF_META, &vcc->flags); 939 set_bit(ATM_VF_READY, &vcc->flags); 940 941 /* Set default values to these variables */ 942 priv->maximum_unknown_frame_count = 1; 943 priv->max_unknown_frame_time = (1 * HZ); 944 priv->vcc_timeout_period = (1200 * HZ); 945 priv->max_retry_count = 1; 946 priv->aging_time = (300 * HZ); 947 priv->forward_delay_time = (15 * HZ); 948 priv->topology_change = 0; 949 priv->arp_response_time = (1 * HZ); 950 priv->flush_timeout = (4 * HZ); 951 priv->path_switching_delay = (6 * HZ); 952 953 if (dev_lec[i]->flags & IFF_UP) { 954 netif_start_queue(dev_lec[i]); 955 } 956 __module_get(THIS_MODULE); 957 return i; 958 } 959 960 #ifdef CONFIG_PROC_FS 961 static char *lec_arp_get_status_string(unsigned char status) 962 { 963 static char *lec_arp_status_string[] = { 964 "ESI_UNKNOWN ", 965 "ESI_ARP_PENDING ", 966 "ESI_VC_PENDING ", 967 "<Undefined> ", 968 "ESI_FLUSH_PENDING ", 969 "ESI_FORWARD_DIRECT" 970 }; 971 972 if (status > ESI_FORWARD_DIRECT) 973 status = 3; /* ESI_UNDEFINED */ 974 return lec_arp_status_string[status]; 975 } 976 977 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 978 { 979 int i; 980 981 for (i = 0; i < ETH_ALEN; i++) 982 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 983 seq_printf(seq, " "); 984 for (i = 0; i < ATM_ESA_LEN; i++) 985 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 986 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 987 entry->flags & 0xffff); 988 if (entry->vcc) 989 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 990 else 991 seq_printf(seq, " "); 992 if (entry->recv_vcc) { 993 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 994 entry->recv_vcc->vci); 995 } 996 seq_putc(seq, '\n'); 997 } 998 999 struct lec_state { 1000 unsigned long flags; 1001 struct lec_priv *locked; 1002 struct hlist_node *node; 1003 struct net_device *dev; 1004 int itf; 1005 int arp_table; 1006 int misc_table; 1007 }; 1008 1009 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1010 loff_t *l) 1011 { 1012 struct hlist_node *e = state->node; 1013 struct lec_arp_table *tmp; 1014 1015 if (!e) 1016 e = tbl->first; 1017 if (e == (void *)1) { 1018 e = tbl->first; 1019 --*l; 1020 } 1021 1022 hlist_for_each_entry_from(tmp, e, next) { 1023 if (--*l < 0) 1024 break; 1025 } 1026 state->node = e; 1027 1028 return (*l < 0) ? state : NULL; 1029 } 1030 1031 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1032 struct lec_priv *priv) 1033 { 1034 void *v = NULL; 1035 int p; 1036 1037 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1038 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1039 if (v) 1040 break; 1041 } 1042 state->arp_table = p; 1043 return v; 1044 } 1045 1046 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1047 struct lec_priv *priv) 1048 { 1049 struct hlist_head *lec_misc_tables[] = { 1050 &priv->lec_arp_empty_ones, 1051 &priv->lec_no_forward, 1052 &priv->mcast_fwds 1053 }; 1054 void *v = NULL; 1055 int q; 1056 1057 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1058 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1059 if (v) 1060 break; 1061 } 1062 state->misc_table = q; 1063 return v; 1064 } 1065 1066 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1067 struct lec_priv *priv) 1068 { 1069 if (!state->locked) { 1070 state->locked = priv; 1071 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1072 } 1073 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1074 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1075 state->locked = NULL; 1076 /* Partial state reset for the next time we get called */ 1077 state->arp_table = state->misc_table = 0; 1078 } 1079 return state->locked; 1080 } 1081 1082 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1083 { 1084 struct net_device *dev; 1085 void *v; 1086 1087 dev = state->dev ? state->dev : dev_lec[state->itf]; 1088 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; 1089 if (!v && dev) { 1090 dev_put(dev); 1091 /* Partial state reset for the next time we get called */ 1092 dev = NULL; 1093 } 1094 state->dev = dev; 1095 return v; 1096 } 1097 1098 static void *lec_get_idx(struct lec_state *state, loff_t l) 1099 { 1100 void *v = NULL; 1101 1102 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1103 v = lec_itf_walk(state, &l); 1104 if (v) 1105 break; 1106 } 1107 return v; 1108 } 1109 1110 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1111 { 1112 struct lec_state *state = seq->private; 1113 1114 state->itf = 0; 1115 state->dev = NULL; 1116 state->locked = NULL; 1117 state->arp_table = 0; 1118 state->misc_table = 0; 1119 state->node = (void *)1; 1120 1121 return *pos ? lec_get_idx(state, *pos) : (void *)1; 1122 } 1123 1124 static void lec_seq_stop(struct seq_file *seq, void *v) 1125 { 1126 struct lec_state *state = seq->private; 1127 1128 if (state->dev) { 1129 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1130 state->flags); 1131 dev_put(state->dev); 1132 } 1133 } 1134 1135 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1136 { 1137 struct lec_state *state = seq->private; 1138 1139 v = lec_get_idx(state, 1); 1140 *pos += !!PTR_ERR(v); 1141 return v; 1142 } 1143 1144 static int lec_seq_show(struct seq_file *seq, void *v) 1145 { 1146 static char lec_banner[] = "Itf MAC ATM destination" 1147 " Status Flags " 1148 "VPI/VCI Recv VPI/VCI\n"; 1149 1150 if (v == (void *)1) 1151 seq_puts(seq, lec_banner); 1152 else { 1153 struct lec_state *state = seq->private; 1154 struct net_device *dev = state->dev; 1155 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1156 1157 seq_printf(seq, "%s ", dev->name); 1158 lec_info(seq, entry); 1159 } 1160 return 0; 1161 } 1162 1163 static const struct seq_operations lec_seq_ops = { 1164 .start = lec_seq_start, 1165 .next = lec_seq_next, 1166 .stop = lec_seq_stop, 1167 .show = lec_seq_show, 1168 }; 1169 1170 static int lec_seq_open(struct inode *inode, struct file *file) 1171 { 1172 struct lec_state *state; 1173 struct seq_file *seq; 1174 int rc = -EAGAIN; 1175 1176 state = kmalloc(sizeof(*state), GFP_KERNEL); 1177 if (!state) { 1178 rc = -ENOMEM; 1179 goto out; 1180 } 1181 1182 rc = seq_open(file, &lec_seq_ops); 1183 if (rc) 1184 goto out_kfree; 1185 seq = file->private_data; 1186 seq->private = state; 1187 out: 1188 return rc; 1189 1190 out_kfree: 1191 kfree(state); 1192 goto out; 1193 } 1194 1195 static int lec_seq_release(struct inode *inode, struct file *file) 1196 { 1197 return seq_release_private(inode, file); 1198 } 1199 1200 static const struct file_operations lec_seq_fops = { 1201 .owner = THIS_MODULE, 1202 .open = lec_seq_open, 1203 .read = seq_read, 1204 .llseek = seq_lseek, 1205 .release = lec_seq_release, 1206 }; 1207 #endif 1208 1209 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1210 { 1211 struct atm_vcc *vcc = ATM_SD(sock); 1212 int err = 0; 1213 1214 switch (cmd) { 1215 case ATMLEC_CTRL: 1216 case ATMLEC_MCAST: 1217 case ATMLEC_DATA: 1218 if (!capable(CAP_NET_ADMIN)) 1219 return -EPERM; 1220 break; 1221 default: 1222 return -ENOIOCTLCMD; 1223 } 1224 1225 switch (cmd) { 1226 case ATMLEC_CTRL: 1227 err = lecd_attach(vcc, (int)arg); 1228 if (err >= 0) 1229 sock->state = SS_CONNECTED; 1230 break; 1231 case ATMLEC_MCAST: 1232 err = lec_mcast_attach(vcc, (int)arg); 1233 break; 1234 case ATMLEC_DATA: 1235 err = lec_vcc_attach(vcc, (void __user *)arg); 1236 break; 1237 } 1238 1239 return err; 1240 } 1241 1242 static struct atm_ioctl lane_ioctl_ops = { 1243 .owner = THIS_MODULE, 1244 .ioctl = lane_ioctl, 1245 }; 1246 1247 static int __init lane_module_init(void) 1248 { 1249 #ifdef CONFIG_PROC_FS 1250 struct proc_dir_entry *p; 1251 1252 p = create_proc_entry("lec", S_IRUGO, atm_proc_root); 1253 if (p) 1254 p->proc_fops = &lec_seq_fops; 1255 #endif 1256 1257 register_atm_ioctl(&lane_ioctl_ops); 1258 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1259 return 0; 1260 } 1261 1262 static void __exit lane_module_cleanup(void) 1263 { 1264 int i; 1265 struct lec_priv *priv; 1266 1267 remove_proc_entry("lec", atm_proc_root); 1268 1269 deregister_atm_ioctl(&lane_ioctl_ops); 1270 1271 for (i = 0; i < MAX_LEC_ITF; i++) { 1272 if (dev_lec[i] != NULL) { 1273 priv = (struct lec_priv *)dev_lec[i]->priv; 1274 unregister_netdev(dev_lec[i]); 1275 free_netdev(dev_lec[i]); 1276 dev_lec[i] = NULL; 1277 } 1278 } 1279 1280 return; 1281 } 1282 1283 module_init(lane_module_init); 1284 module_exit(lane_module_cleanup); 1285 1286 /* 1287 * LANE2: 3.1.3, LE_RESOLVE.request 1288 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1289 * If sizeoftlvs == NULL the default TLVs associated with with this 1290 * lec will be used. 1291 * If dst_mac == NULL, targetless LE_ARP will be sent 1292 */ 1293 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 1294 u8 **tlvs, u32 *sizeoftlvs) 1295 { 1296 unsigned long flags; 1297 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1298 struct lec_arp_table *table; 1299 struct sk_buff *skb; 1300 int retval; 1301 1302 if (force == 0) { 1303 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1304 table = lec_arp_find(priv, dst_mac); 1305 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1306 if (table == NULL) 1307 return -1; 1308 1309 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1310 if (*tlvs == NULL) 1311 return -1; 1312 1313 *sizeoftlvs = table->sizeoftlvs; 1314 1315 return 0; 1316 } 1317 1318 if (sizeoftlvs == NULL) 1319 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1320 1321 else { 1322 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1323 if (skb == NULL) 1324 return -1; 1325 skb->len = *sizeoftlvs; 1326 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); 1327 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1328 } 1329 return retval; 1330 } 1331 1332 /* 1333 * LANE2: 3.1.4, LE_ASSOCIATE.request 1334 * Associate the *tlvs with the *lan_dst address. 1335 * Will overwrite any previous association 1336 * Returns 1 for success, 0 for failure (out of memory) 1337 * 1338 */ 1339 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 1340 u8 *tlvs, u32 sizeoftlvs) 1341 { 1342 int retval; 1343 struct sk_buff *skb; 1344 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1345 1346 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1347 return (0); /* not our mac address */ 1348 1349 kfree(priv->tlvs); /* NULL if there was no previous association */ 1350 1351 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1352 if (priv->tlvs == NULL) 1353 return (0); 1354 priv->sizeoftlvs = sizeoftlvs; 1355 1356 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1357 if (skb == NULL) 1358 return 0; 1359 skb->len = sizeoftlvs; 1360 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); 1361 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1362 if (retval != 0) 1363 printk("lec.c: lane2_associate_req() failed\n"); 1364 /* 1365 * If the previous association has changed we must 1366 * somehow notify other LANE entities about the change 1367 */ 1368 return (1); 1369 } 1370 1371 /* 1372 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1373 * 1374 */ 1375 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr, 1376 u8 *tlvs, u32 sizeoftlvs) 1377 { 1378 #if 0 1379 int i = 0; 1380 #endif 1381 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1382 #if 0 /* 1383 * Why have the TLVs in LE_ARP entries 1384 * since we do not use them? When you 1385 * uncomment this code, make sure the 1386 * TLVs get freed when entry is killed 1387 */ 1388 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1389 1390 if (entry == NULL) 1391 return; /* should not happen */ 1392 1393 kfree(entry->tlvs); 1394 1395 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1396 if (entry->tlvs == NULL) 1397 return; 1398 entry->sizeoftlvs = sizeoftlvs; 1399 #endif 1400 #if 0 1401 printk("lec.c: lane2_associate_ind()\n"); 1402 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1403 while (i < sizeoftlvs) 1404 printk("%02x ", tlvs[i++]); 1405 1406 printk("\n"); 1407 #endif 1408 1409 /* tell MPOA about the TLVs we saw */ 1410 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1411 priv->lane2_ops->associate_indicator(dev, mac_addr, 1412 tlvs, sizeoftlvs); 1413 } 1414 return; 1415 } 1416 1417 /* 1418 * Here starts what used to lec_arpc.c 1419 * 1420 * lec_arpc.c was added here when making 1421 * lane client modular. October 1997 1422 */ 1423 1424 #include <linux/types.h> 1425 #include <linux/timer.h> 1426 #include <asm/param.h> 1427 #include <asm/atomic.h> 1428 #include <linux/inetdevice.h> 1429 #include <net/route.h> 1430 1431 #if 0 1432 #define pr_debug(format,args...) 1433 /* 1434 #define pr_debug printk 1435 */ 1436 #endif 1437 #define DEBUG_ARP_TABLE 0 1438 1439 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1440 1441 static void lec_arp_check_expire(struct work_struct *work); 1442 static void lec_arp_expire_arp(unsigned long data); 1443 1444 /* 1445 * Arp table funcs 1446 */ 1447 1448 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1449 1450 /* 1451 * Initialization of arp-cache 1452 */ 1453 static void lec_arp_init(struct lec_priv *priv) 1454 { 1455 unsigned short i; 1456 1457 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1458 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1459 } 1460 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1461 INIT_HLIST_HEAD(&priv->lec_no_forward); 1462 INIT_HLIST_HEAD(&priv->mcast_fwds); 1463 spin_lock_init(&priv->lec_arp_lock); 1464 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1465 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1466 } 1467 1468 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1469 { 1470 if (entry->vcc) { 1471 struct atm_vcc *vcc = entry->vcc; 1472 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1473 struct net_device *dev = (struct net_device *)vcc->proto_data; 1474 1475 vcc->pop = vpriv->old_pop; 1476 if (vpriv->xoff) 1477 netif_wake_queue(dev); 1478 kfree(vpriv); 1479 vcc->user_back = NULL; 1480 vcc->push = entry->old_push; 1481 vcc_release_async(vcc, -EPIPE); 1482 entry->vcc = NULL; 1483 } 1484 if (entry->recv_vcc) { 1485 entry->recv_vcc->push = entry->old_recv_push; 1486 vcc_release_async(entry->recv_vcc, -EPIPE); 1487 entry->recv_vcc = NULL; 1488 } 1489 } 1490 1491 /* 1492 * Insert entry to lec_arp_table 1493 * LANE2: Add to the end of the list to satisfy 8.1.13 1494 */ 1495 static inline void 1496 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1497 { 1498 struct hlist_head *tmp; 1499 1500 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1501 hlist_add_head(&entry->next, tmp); 1502 1503 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1504 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1505 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1506 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1507 } 1508 1509 /* 1510 * Remove entry from lec_arp_table 1511 */ 1512 static int 1513 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1514 { 1515 struct hlist_node *node; 1516 struct lec_arp_table *entry; 1517 int i, remove_vcc = 1; 1518 1519 if (!to_remove) { 1520 return -1; 1521 } 1522 1523 hlist_del(&to_remove->next); 1524 del_timer(&to_remove->timer); 1525 1526 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1527 if (to_remove->status >= ESI_FLUSH_PENDING) { 1528 /* 1529 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1530 */ 1531 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1532 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1533 if (memcmp(to_remove->atm_addr, 1534 entry->atm_addr, ATM_ESA_LEN) == 0) { 1535 remove_vcc = 0; 1536 break; 1537 } 1538 } 1539 } 1540 if (remove_vcc) 1541 lec_arp_clear_vccs(to_remove); 1542 } 1543 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1544 1545 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1546 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1547 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1548 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1549 return 0; 1550 } 1551 1552 #if DEBUG_ARP_TABLE 1553 static char *get_status_string(unsigned char st) 1554 { 1555 switch (st) { 1556 case ESI_UNKNOWN: 1557 return "ESI_UNKNOWN"; 1558 case ESI_ARP_PENDING: 1559 return "ESI_ARP_PENDING"; 1560 case ESI_VC_PENDING: 1561 return "ESI_VC_PENDING"; 1562 case ESI_FLUSH_PENDING: 1563 return "ESI_FLUSH_PENDING"; 1564 case ESI_FORWARD_DIRECT: 1565 return "ESI_FORWARD_DIRECT"; 1566 default: 1567 return "<UNKNOWN>"; 1568 } 1569 } 1570 1571 static void dump_arp_table(struct lec_priv *priv) 1572 { 1573 struct hlist_node *node; 1574 struct lec_arp_table *rulla; 1575 char buf[256]; 1576 int i, j, offset; 1577 1578 printk("Dump %p:\n", priv); 1579 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1580 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1581 offset = 0; 1582 offset += sprintf(buf, "%d: %p\n", i, rulla); 1583 offset += sprintf(buf + offset, "Mac:"); 1584 for (j = 0; j < ETH_ALEN; j++) { 1585 offset += sprintf(buf + offset, 1586 "%2.2x ", 1587 rulla->mac_addr[j] & 0xff); 1588 } 1589 offset += sprintf(buf + offset, "Atm:"); 1590 for (j = 0; j < ATM_ESA_LEN; j++) { 1591 offset += sprintf(buf + offset, 1592 "%2.2x ", 1593 rulla->atm_addr[j] & 0xff); 1594 } 1595 offset += sprintf(buf + offset, 1596 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1597 rulla->vcc ? rulla->vcc->vpi : 0, 1598 rulla->vcc ? rulla->vcc->vci : 0, 1599 rulla->recv_vcc ? rulla->recv_vcc-> 1600 vpi : 0, 1601 rulla->recv_vcc ? rulla->recv_vcc-> 1602 vci : 0, rulla->last_used, 1603 rulla->timestamp, rulla->no_tries); 1604 offset += 1605 sprintf(buf + offset, 1606 "Flags:%x, Packets_flooded:%x, Status: %s ", 1607 rulla->flags, rulla->packets_flooded, 1608 get_status_string(rulla->status)); 1609 printk("%s\n", buf); 1610 } 1611 } 1612 1613 if (!hlist_empty(&priv->lec_no_forward)) 1614 printk("No forward\n"); 1615 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1616 offset = 0; 1617 offset += sprintf(buf + offset, "Mac:"); 1618 for (j = 0; j < ETH_ALEN; j++) { 1619 offset += sprintf(buf + offset, "%2.2x ", 1620 rulla->mac_addr[j] & 0xff); 1621 } 1622 offset += sprintf(buf + offset, "Atm:"); 1623 for (j = 0; j < ATM_ESA_LEN; j++) { 1624 offset += sprintf(buf + offset, "%2.2x ", 1625 rulla->atm_addr[j] & 0xff); 1626 } 1627 offset += sprintf(buf + offset, 1628 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1629 rulla->vcc ? rulla->vcc->vpi : 0, 1630 rulla->vcc ? rulla->vcc->vci : 0, 1631 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1632 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1633 rulla->last_used, 1634 rulla->timestamp, rulla->no_tries); 1635 offset += sprintf(buf + offset, 1636 "Flags:%x, Packets_flooded:%x, Status: %s ", 1637 rulla->flags, rulla->packets_flooded, 1638 get_status_string(rulla->status)); 1639 printk("%s\n", buf); 1640 } 1641 1642 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1643 printk("Empty ones\n"); 1644 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { 1645 offset = 0; 1646 offset += sprintf(buf + offset, "Mac:"); 1647 for (j = 0; j < ETH_ALEN; j++) { 1648 offset += sprintf(buf + offset, "%2.2x ", 1649 rulla->mac_addr[j] & 0xff); 1650 } 1651 offset += sprintf(buf + offset, "Atm:"); 1652 for (j = 0; j < ATM_ESA_LEN; j++) { 1653 offset += sprintf(buf + offset, "%2.2x ", 1654 rulla->atm_addr[j] & 0xff); 1655 } 1656 offset += sprintf(buf + offset, 1657 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1658 rulla->vcc ? rulla->vcc->vpi : 0, 1659 rulla->vcc ? rulla->vcc->vci : 0, 1660 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1661 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1662 rulla->last_used, 1663 rulla->timestamp, rulla->no_tries); 1664 offset += sprintf(buf + offset, 1665 "Flags:%x, Packets_flooded:%x, Status: %s ", 1666 rulla->flags, rulla->packets_flooded, 1667 get_status_string(rulla->status)); 1668 printk("%s", buf); 1669 } 1670 1671 if (!hlist_empty(&priv->mcast_fwds)) 1672 printk("Multicast Forward VCCs\n"); 1673 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { 1674 offset = 0; 1675 offset += sprintf(buf + offset, "Mac:"); 1676 for (j = 0; j < ETH_ALEN; j++) { 1677 offset += sprintf(buf + offset, "%2.2x ", 1678 rulla->mac_addr[j] & 0xff); 1679 } 1680 offset += sprintf(buf + offset, "Atm:"); 1681 for (j = 0; j < ATM_ESA_LEN; j++) { 1682 offset += sprintf(buf + offset, "%2.2x ", 1683 rulla->atm_addr[j] & 0xff); 1684 } 1685 offset += sprintf(buf + offset, 1686 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1687 rulla->vcc ? rulla->vcc->vpi : 0, 1688 rulla->vcc ? rulla->vcc->vci : 0, 1689 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1690 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1691 rulla->last_used, 1692 rulla->timestamp, rulla->no_tries); 1693 offset += sprintf(buf + offset, 1694 "Flags:%x, Packets_flooded:%x, Status: %s ", 1695 rulla->flags, rulla->packets_flooded, 1696 get_status_string(rulla->status)); 1697 printk("%s\n", buf); 1698 } 1699 1700 } 1701 #else 1702 #define dump_arp_table(priv) do { } while (0) 1703 #endif 1704 1705 /* 1706 * Destruction of arp-cache 1707 */ 1708 static void lec_arp_destroy(struct lec_priv *priv) 1709 { 1710 unsigned long flags; 1711 struct hlist_node *node, *next; 1712 struct lec_arp_table *entry; 1713 int i; 1714 1715 cancel_rearming_delayed_work(&priv->lec_arp_work); 1716 1717 /* 1718 * Remove all entries 1719 */ 1720 1721 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1722 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1723 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1724 lec_arp_remove(priv, entry); 1725 lec_arp_put(entry); 1726 } 1727 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1728 } 1729 1730 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 1731 del_timer_sync(&entry->timer); 1732 lec_arp_clear_vccs(entry); 1733 hlist_del(&entry->next); 1734 lec_arp_put(entry); 1735 } 1736 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1737 1738 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1739 del_timer_sync(&entry->timer); 1740 lec_arp_clear_vccs(entry); 1741 hlist_del(&entry->next); 1742 lec_arp_put(entry); 1743 } 1744 INIT_HLIST_HEAD(&priv->lec_no_forward); 1745 1746 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1747 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1748 lec_arp_clear_vccs(entry); 1749 hlist_del(&entry->next); 1750 lec_arp_put(entry); 1751 } 1752 INIT_HLIST_HEAD(&priv->mcast_fwds); 1753 priv->mcast_vcc = NULL; 1754 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1755 } 1756 1757 /* 1758 * Find entry by mac_address 1759 */ 1760 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1761 unsigned char *mac_addr) 1762 { 1763 struct hlist_node *node; 1764 struct hlist_head *head; 1765 struct lec_arp_table *entry; 1766 1767 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1768 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1769 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1770 1771 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1772 hlist_for_each_entry(entry, node, head, next) { 1773 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1774 return entry; 1775 } 1776 } 1777 return NULL; 1778 } 1779 1780 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1781 unsigned char *mac_addr) 1782 { 1783 struct lec_arp_table *to_return; 1784 1785 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1786 if (!to_return) { 1787 printk("LEC: Arp entry kmalloc failed\n"); 1788 return NULL; 1789 } 1790 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1791 INIT_HLIST_NODE(&to_return->next); 1792 init_timer(&to_return->timer); 1793 to_return->timer.function = lec_arp_expire_arp; 1794 to_return->timer.data = (unsigned long)to_return; 1795 to_return->last_used = jiffies; 1796 to_return->priv = priv; 1797 skb_queue_head_init(&to_return->tx_wait); 1798 atomic_set(&to_return->usage, 1); 1799 return to_return; 1800 } 1801 1802 /* Arp sent timer expired */ 1803 static void lec_arp_expire_arp(unsigned long data) 1804 { 1805 struct lec_arp_table *entry; 1806 1807 entry = (struct lec_arp_table *)data; 1808 1809 pr_debug("lec_arp_expire_arp\n"); 1810 if (entry->status == ESI_ARP_PENDING) { 1811 if (entry->no_tries <= entry->priv->max_retry_count) { 1812 if (entry->is_rdesc) 1813 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1814 entry->mac_addr, NULL, NULL); 1815 else 1816 send_to_lecd(entry->priv, l_arp_xmt, 1817 entry->mac_addr, NULL, NULL); 1818 entry->no_tries++; 1819 } 1820 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1821 } 1822 } 1823 1824 /* Unknown/unused vcc expire, remove associated entry */ 1825 static void lec_arp_expire_vcc(unsigned long data) 1826 { 1827 unsigned long flags; 1828 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1829 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1830 1831 del_timer(&to_remove->timer); 1832 1833 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1834 to_remove, priv, 1835 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1836 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1837 1838 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1839 hlist_del(&to_remove->next); 1840 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1841 1842 lec_arp_clear_vccs(to_remove); 1843 lec_arp_put(to_remove); 1844 } 1845 1846 /* 1847 * Expire entries. 1848 * 1. Re-set timer 1849 * 2. For each entry, delete entries that have aged past the age limit. 1850 * 3. For each entry, depending on the status of the entry, perform 1851 * the following maintenance. 1852 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1853 * tick_count is above the max_unknown_frame_time, clear 1854 * the tick_count to zero and clear the packets_flooded counter 1855 * to zero. This supports the packet rate limit per address 1856 * while flooding unknowns. 1857 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1858 * than or equal to the path_switching_delay, change the status 1859 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1860 * regardless of the progress of the flush protocol. 1861 */ 1862 static void lec_arp_check_expire(struct work_struct *work) 1863 { 1864 unsigned long flags; 1865 struct lec_priv *priv = 1866 container_of(work, struct lec_priv, lec_arp_work.work); 1867 struct hlist_node *node, *next; 1868 struct lec_arp_table *entry; 1869 unsigned long now; 1870 unsigned long time_to_check; 1871 int i; 1872 1873 pr_debug("lec_arp_check_expire %p\n", priv); 1874 now = jiffies; 1875 restart: 1876 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1877 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1878 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1879 if ((entry->flags) & LEC_REMOTE_FLAG && 1880 priv->topology_change) 1881 time_to_check = priv->forward_delay_time; 1882 else 1883 time_to_check = priv->aging_time; 1884 1885 pr_debug("About to expire: %lx - %lx > %lx\n", 1886 now, entry->last_used, time_to_check); 1887 if (time_after(now, entry->last_used + time_to_check) 1888 && !(entry->flags & LEC_PERMANENT_FLAG) 1889 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1890 /* Remove entry */ 1891 pr_debug("LEC:Entry timed out\n"); 1892 lec_arp_remove(priv, entry); 1893 lec_arp_put(entry); 1894 } else { 1895 /* Something else */ 1896 if ((entry->status == ESI_VC_PENDING || 1897 entry->status == ESI_ARP_PENDING) 1898 && time_after_eq(now, 1899 entry->timestamp + 1900 priv-> 1901 max_unknown_frame_time)) { 1902 entry->timestamp = jiffies; 1903 entry->packets_flooded = 0; 1904 if (entry->status == ESI_VC_PENDING) 1905 send_to_lecd(priv, l_svc_setup, 1906 entry->mac_addr, 1907 entry->atm_addr, 1908 NULL); 1909 } 1910 if (entry->status == ESI_FLUSH_PENDING 1911 && 1912 time_after_eq(now, entry->timestamp + 1913 priv->path_switching_delay)) { 1914 struct sk_buff *skb; 1915 struct atm_vcc *vcc = entry->vcc; 1916 1917 lec_arp_hold(entry); 1918 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1919 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1920 lec_send(vcc, skb, entry->priv); 1921 entry->last_used = jiffies; 1922 entry->status = ESI_FORWARD_DIRECT; 1923 lec_arp_put(entry); 1924 goto restart; 1925 } 1926 } 1927 } 1928 } 1929 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1930 1931 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1932 } 1933 1934 /* 1935 * Try to find vcc where mac_address is attached. 1936 * 1937 */ 1938 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1939 unsigned char *mac_to_find, int is_rdesc, 1940 struct lec_arp_table **ret_entry) 1941 { 1942 unsigned long flags; 1943 struct lec_arp_table *entry; 1944 struct atm_vcc *found; 1945 1946 if (mac_to_find[0] & 0x01) { 1947 switch (priv->lane_version) { 1948 case 1: 1949 return priv->mcast_vcc; 1950 break; 1951 case 2: /* LANE2 wants arp for multicast addresses */ 1952 if (!compare_ether_addr(mac_to_find, bus_mac)) 1953 return priv->mcast_vcc; 1954 break; 1955 default: 1956 break; 1957 } 1958 } 1959 1960 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1961 entry = lec_arp_find(priv, mac_to_find); 1962 1963 if (entry) { 1964 if (entry->status == ESI_FORWARD_DIRECT) { 1965 /* Connection Ok */ 1966 entry->last_used = jiffies; 1967 lec_arp_hold(entry); 1968 *ret_entry = entry; 1969 found = entry->vcc; 1970 goto out; 1971 } 1972 /* 1973 * If the LE_ARP cache entry is still pending, reset count to 0 1974 * so another LE_ARP request can be made for this frame. 1975 */ 1976 if (entry->status == ESI_ARP_PENDING) { 1977 entry->no_tries = 0; 1978 } 1979 /* 1980 * Data direct VC not yet set up, check to see if the unknown 1981 * frame count is greater than the limit. If the limit has 1982 * not been reached, allow the caller to send packet to 1983 * BUS. 1984 */ 1985 if (entry->status != ESI_FLUSH_PENDING && 1986 entry->packets_flooded < 1987 priv->maximum_unknown_frame_count) { 1988 entry->packets_flooded++; 1989 pr_debug("LEC_ARP: Flooding..\n"); 1990 found = priv->mcast_vcc; 1991 goto out; 1992 } 1993 /* 1994 * We got here because entry->status == ESI_FLUSH_PENDING 1995 * or BUS flood limit was reached for an entry which is 1996 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 1997 */ 1998 lec_arp_hold(entry); 1999 *ret_entry = entry; 2000 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status, 2001 entry->vcc); 2002 found = NULL; 2003 } else { 2004 /* No matching entry was found */ 2005 entry = make_entry(priv, mac_to_find); 2006 pr_debug("LEC_ARP: Making entry\n"); 2007 if (!entry) { 2008 found = priv->mcast_vcc; 2009 goto out; 2010 } 2011 lec_arp_add(priv, entry); 2012 /* We want arp-request(s) to be sent */ 2013 entry->packets_flooded = 1; 2014 entry->status = ESI_ARP_PENDING; 2015 entry->no_tries = 1; 2016 entry->last_used = entry->timestamp = jiffies; 2017 entry->is_rdesc = is_rdesc; 2018 if (entry->is_rdesc) 2019 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 2020 NULL); 2021 else 2022 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 2023 entry->timer.expires = jiffies + (1 * HZ); 2024 entry->timer.function = lec_arp_expire_arp; 2025 add_timer(&entry->timer); 2026 found = priv->mcast_vcc; 2027 } 2028 2029 out: 2030 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2031 return found; 2032 } 2033 2034 static int 2035 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 2036 unsigned long permanent) 2037 { 2038 unsigned long flags; 2039 struct hlist_node *node, *next; 2040 struct lec_arp_table *entry; 2041 int i; 2042 2043 pr_debug("lec_addr_delete\n"); 2044 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2045 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2046 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2047 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2048 && (permanent || 2049 !(entry->flags & LEC_PERMANENT_FLAG))) { 2050 lec_arp_remove(priv, entry); 2051 lec_arp_put(entry); 2052 } 2053 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2054 return 0; 2055 } 2056 } 2057 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2058 return -1; 2059 } 2060 2061 /* 2062 * Notifies: Response to arp_request (atm_addr != NULL) 2063 */ 2064 static void 2065 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 2066 unsigned char *atm_addr, unsigned long remoteflag, 2067 unsigned int targetless_le_arp) 2068 { 2069 unsigned long flags; 2070 struct hlist_node *node, *next; 2071 struct lec_arp_table *entry, *tmp; 2072 int i; 2073 2074 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2075 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2076 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2077 mac_addr[4], mac_addr[5]); 2078 2079 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2080 entry = lec_arp_find(priv, mac_addr); 2081 if (entry == NULL && targetless_le_arp) 2082 goto out; /* 2083 * LANE2: ignore targetless LE_ARPs for which 2084 * we have no entry in the cache. 7.1.30 2085 */ 2086 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2087 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2088 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2089 hlist_del(&entry->next); 2090 del_timer(&entry->timer); 2091 tmp = lec_arp_find(priv, mac_addr); 2092 if (tmp) { 2093 del_timer(&tmp->timer); 2094 tmp->status = ESI_FORWARD_DIRECT; 2095 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2096 tmp->vcc = entry->vcc; 2097 tmp->old_push = entry->old_push; 2098 tmp->last_used = jiffies; 2099 del_timer(&entry->timer); 2100 lec_arp_put(entry); 2101 entry = tmp; 2102 } else { 2103 entry->status = ESI_FORWARD_DIRECT; 2104 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2105 entry->last_used = jiffies; 2106 lec_arp_add(priv, entry); 2107 } 2108 if (remoteflag) 2109 entry->flags |= LEC_REMOTE_FLAG; 2110 else 2111 entry->flags &= ~LEC_REMOTE_FLAG; 2112 pr_debug("After update\n"); 2113 dump_arp_table(priv); 2114 goto out; 2115 } 2116 } 2117 } 2118 2119 entry = lec_arp_find(priv, mac_addr); 2120 if (!entry) { 2121 entry = make_entry(priv, mac_addr); 2122 if (!entry) 2123 goto out; 2124 entry->status = ESI_UNKNOWN; 2125 lec_arp_add(priv, entry); 2126 /* Temporary, changes before end of function */ 2127 } 2128 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2129 del_timer(&entry->timer); 2130 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2131 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2132 if (entry != tmp && 2133 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2134 /* Vcc to this host exists */ 2135 if (tmp->status > ESI_VC_PENDING) { 2136 /* 2137 * ESI_FLUSH_PENDING, 2138 * ESI_FORWARD_DIRECT 2139 */ 2140 entry->vcc = tmp->vcc; 2141 entry->old_push = tmp->old_push; 2142 } 2143 entry->status = tmp->status; 2144 break; 2145 } 2146 } 2147 } 2148 if (remoteflag) 2149 entry->flags |= LEC_REMOTE_FLAG; 2150 else 2151 entry->flags &= ~LEC_REMOTE_FLAG; 2152 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2153 entry->status = ESI_VC_PENDING; 2154 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2155 } 2156 pr_debug("After update2\n"); 2157 dump_arp_table(priv); 2158 out: 2159 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2160 } 2161 2162 /* 2163 * Notifies: Vcc setup ready 2164 */ 2165 static void 2166 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 2167 struct atm_vcc *vcc, 2168 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2169 { 2170 unsigned long flags; 2171 struct hlist_node *node; 2172 struct lec_arp_table *entry; 2173 int i, found_entry = 0; 2174 2175 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2176 if (ioc_data->receive == 2) { 2177 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2178 2179 pr_debug("LEC_ARP: Attaching mcast forward\n"); 2180 #if 0 2181 entry = lec_arp_find(priv, bus_mac); 2182 if (!entry) { 2183 printk("LEC_ARP: Multicast entry not found!\n"); 2184 goto out; 2185 } 2186 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2187 entry->recv_vcc = vcc; 2188 entry->old_recv_push = old_push; 2189 #endif 2190 entry = make_entry(priv, bus_mac); 2191 if (entry == NULL) 2192 goto out; 2193 del_timer(&entry->timer); 2194 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2195 entry->recv_vcc = vcc; 2196 entry->old_recv_push = old_push; 2197 hlist_add_head(&entry->next, &priv->mcast_fwds); 2198 goto out; 2199 } else if (ioc_data->receive == 1) { 2200 /* 2201 * Vcc which we don't want to make default vcc, 2202 * attach it anyway. 2203 */ 2204 pr_debug 2205 ("LEC_ARP:Attaching data direct, not default: " 2206 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2207 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2208 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2209 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2210 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2211 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2212 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2213 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2214 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2215 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2216 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2217 entry = make_entry(priv, bus_mac); 2218 if (entry == NULL) 2219 goto out; 2220 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2221 memset(entry->mac_addr, 0, ETH_ALEN); 2222 entry->recv_vcc = vcc; 2223 entry->old_recv_push = old_push; 2224 entry->status = ESI_UNKNOWN; 2225 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2226 entry->timer.function = lec_arp_expire_vcc; 2227 hlist_add_head(&entry->next, &priv->lec_no_forward); 2228 add_timer(&entry->timer); 2229 dump_arp_table(priv); 2230 goto out; 2231 } 2232 pr_debug 2233 ("LEC_ARP:Attaching data direct, default: " 2234 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2235 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2236 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2237 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2238 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2239 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2240 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2241 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2242 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2243 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2244 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2245 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2246 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2247 if (memcmp 2248 (ioc_data->atm_addr, entry->atm_addr, 2249 ATM_ESA_LEN) == 0) { 2250 pr_debug("LEC_ARP: Attaching data direct\n"); 2251 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", 2252 entry->vcc ? entry->vcc->vci : 0, 2253 entry->recv_vcc ? entry->recv_vcc-> 2254 vci : 0); 2255 found_entry = 1; 2256 del_timer(&entry->timer); 2257 entry->vcc = vcc; 2258 entry->old_push = old_push; 2259 if (entry->status == ESI_VC_PENDING) { 2260 if (priv->maximum_unknown_frame_count 2261 == 0) 2262 entry->status = 2263 ESI_FORWARD_DIRECT; 2264 else { 2265 entry->timestamp = jiffies; 2266 entry->status = 2267 ESI_FLUSH_PENDING; 2268 #if 0 2269 send_to_lecd(priv, l_flush_xmt, 2270 NULL, 2271 entry->atm_addr, 2272 NULL); 2273 #endif 2274 } 2275 } else { 2276 /* 2277 * They were forming a connection 2278 * to us, and we to them. Our 2279 * ATM address is numerically lower 2280 * than theirs, so we make connection 2281 * we formed into default VCC (8.1.11). 2282 * Connection they made gets torn 2283 * down. This might confuse some 2284 * clients. Can be changed if 2285 * someone reports trouble... 2286 */ 2287 ; 2288 } 2289 } 2290 } 2291 } 2292 if (found_entry) { 2293 pr_debug("After vcc was added\n"); 2294 dump_arp_table(priv); 2295 goto out; 2296 } 2297 /* 2298 * Not found, snatch address from first data packet that arrives 2299 * from this vcc 2300 */ 2301 entry = make_entry(priv, bus_mac); 2302 if (!entry) 2303 goto out; 2304 entry->vcc = vcc; 2305 entry->old_push = old_push; 2306 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2307 memset(entry->mac_addr, 0, ETH_ALEN); 2308 entry->status = ESI_UNKNOWN; 2309 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2310 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2311 entry->timer.function = lec_arp_expire_vcc; 2312 add_timer(&entry->timer); 2313 pr_debug("After vcc was added\n"); 2314 dump_arp_table(priv); 2315 out: 2316 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2317 } 2318 2319 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2320 { 2321 unsigned long flags; 2322 struct hlist_node *node; 2323 struct lec_arp_table *entry; 2324 int i; 2325 2326 pr_debug("LEC:lec_flush_complete %lx\n", tran_id); 2327 restart: 2328 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2329 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2330 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2331 if (entry->flush_tran_id == tran_id 2332 && entry->status == ESI_FLUSH_PENDING) { 2333 struct sk_buff *skb; 2334 struct atm_vcc *vcc = entry->vcc; 2335 2336 lec_arp_hold(entry); 2337 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2338 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2339 lec_send(vcc, skb, entry->priv); 2340 entry->last_used = jiffies; 2341 entry->status = ESI_FORWARD_DIRECT; 2342 lec_arp_put(entry); 2343 pr_debug("LEC_ARP: Flushed\n"); 2344 goto restart; 2345 } 2346 } 2347 } 2348 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2349 dump_arp_table(priv); 2350 } 2351 2352 static void 2353 lec_set_flush_tran_id(struct lec_priv *priv, 2354 unsigned char *atm_addr, unsigned long tran_id) 2355 { 2356 unsigned long flags; 2357 struct hlist_node *node; 2358 struct lec_arp_table *entry; 2359 int i; 2360 2361 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2362 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2363 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2364 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2365 entry->flush_tran_id = tran_id; 2366 pr_debug("Set flush transaction id to %lx for %p\n", 2367 tran_id, entry); 2368 } 2369 } 2370 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2371 } 2372 2373 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2374 { 2375 unsigned long flags; 2376 unsigned char mac_addr[] = { 2377 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2378 }; 2379 struct lec_arp_table *to_add; 2380 struct lec_vcc_priv *vpriv; 2381 int err = 0; 2382 2383 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2384 return -ENOMEM; 2385 vpriv->xoff = 0; 2386 vpriv->old_pop = vcc->pop; 2387 vcc->user_back = vpriv; 2388 vcc->pop = lec_pop; 2389 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2390 to_add = make_entry(priv, mac_addr); 2391 if (!to_add) { 2392 vcc->pop = vpriv->old_pop; 2393 kfree(vpriv); 2394 err = -ENOMEM; 2395 goto out; 2396 } 2397 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2398 to_add->status = ESI_FORWARD_DIRECT; 2399 to_add->flags |= LEC_PERMANENT_FLAG; 2400 to_add->vcc = vcc; 2401 to_add->old_push = vcc->push; 2402 vcc->push = lec_push; 2403 priv->mcast_vcc = vcc; 2404 lec_arp_add(priv, to_add); 2405 out: 2406 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2407 return err; 2408 } 2409 2410 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2411 { 2412 unsigned long flags; 2413 struct hlist_node *node, *next; 2414 struct lec_arp_table *entry; 2415 int i; 2416 2417 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2418 dump_arp_table(priv); 2419 2420 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2421 2422 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2423 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2424 if (vcc == entry->vcc) { 2425 lec_arp_remove(priv, entry); 2426 lec_arp_put(entry); 2427 if (priv->mcast_vcc == vcc) { 2428 priv->mcast_vcc = NULL; 2429 } 2430 } 2431 } 2432 } 2433 2434 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2435 if (entry->vcc == vcc) { 2436 lec_arp_clear_vccs(entry); 2437 del_timer(&entry->timer); 2438 hlist_del(&entry->next); 2439 lec_arp_put(entry); 2440 } 2441 } 2442 2443 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2444 if (entry->recv_vcc == vcc) { 2445 lec_arp_clear_vccs(entry); 2446 del_timer(&entry->timer); 2447 hlist_del(&entry->next); 2448 lec_arp_put(entry); 2449 } 2450 } 2451 2452 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2453 if (entry->recv_vcc == vcc) { 2454 lec_arp_clear_vccs(entry); 2455 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2456 hlist_del(&entry->next); 2457 lec_arp_put(entry); 2458 } 2459 } 2460 2461 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2462 dump_arp_table(priv); 2463 } 2464 2465 static void 2466 lec_arp_check_empties(struct lec_priv *priv, 2467 struct atm_vcc *vcc, struct sk_buff *skb) 2468 { 2469 unsigned long flags; 2470 struct hlist_node *node, *next; 2471 struct lec_arp_table *entry, *tmp; 2472 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2473 unsigned char *src; 2474 #ifdef CONFIG_TR 2475 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2476 2477 if (priv->is_trdev) 2478 src = tr_hdr->h_source; 2479 else 2480 #endif 2481 src = hdr->h_source; 2482 2483 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2484 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2485 if (vcc == entry->vcc) { 2486 del_timer(&entry->timer); 2487 memcpy(entry->mac_addr, src, ETH_ALEN); 2488 entry->status = ESI_FORWARD_DIRECT; 2489 entry->last_used = jiffies; 2490 /* We might have got an entry */ 2491 if ((tmp = lec_arp_find(priv, src))) { 2492 lec_arp_remove(priv, tmp); 2493 lec_arp_put(tmp); 2494 } 2495 hlist_del(&entry->next); 2496 lec_arp_add(priv, entry); 2497 goto out; 2498 } 2499 } 2500 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); 2501 out: 2502 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2503 } 2504 2505 MODULE_LICENSE("GPL"); 2506