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