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 const 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, const u8 *mac_address, 73 const u8 *tlvs, u32 sizeoftlvs); 74 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, 75 u8 **tlvs, u32 *sizeoftlvs); 76 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, 77 const u8 *tlvs, u32 sizeoftlvs); 78 79 static int lec_addr_delete(struct lec_priv *priv, const 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 const 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, const unsigned char *mac_addr, 90 const 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 const unsigned char *atm_addr, 96 unsigned long tran_id); 97 static void lec_vcc_added(struct lec_priv *priv, const 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 = netdev_priv(dev); 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 unsigned 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 = netdev_priv(dev); 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 = netdev_priv(dev); 256 struct lecdatahdr_8023 *lec_h; 257 struct atm_vcc *vcc; 258 struct lec_arp_table *entry; 259 unsigned char *dst; 260 int min_frame_size; 261 #ifdef CONFIG_TR 262 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ 263 #endif 264 int is_rdesc; 265 #if DUMP_PACKETS > 0 266 char buf[300]; 267 int i = 0; 268 #endif /* DUMP_PACKETS >0 */ 269 270 pr_debug("lec_start_xmit called\n"); 271 if (!priv->lecd) { 272 printk("%s:No lecd attached\n", dev->name); 273 priv->stats.tx_errors++; 274 netif_stop_queue(dev); 275 return -EUNATCH; 276 } 277 278 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", 279 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), 280 (long)skb_end_pointer(skb)); 281 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 282 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) 283 lec_handle_bridge(skb, dev); 284 #endif 285 286 /* Make sure we have room for lec_id */ 287 if (skb_headroom(skb) < 2) { 288 289 pr_debug("lec_start_xmit: reallocating skb\n"); 290 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); 291 kfree_skb(skb); 292 if (skb2 == NULL) 293 return 0; 294 skb = skb2; 295 } 296 skb_push(skb, 2); 297 298 /* Put le header to place, works for TokenRing too */ 299 lec_h = (struct lecdatahdr_8023 *)skb->data; 300 lec_h->le_header = htons(priv->lecid); 301 302 #ifdef CONFIG_TR 303 /* 304 * Ugly. Use this to realign Token Ring packets for 305 * e.g. PCA-200E driver. 306 */ 307 if (priv->is_trdev) { 308 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); 309 kfree_skb(skb); 310 if (skb2 == NULL) 311 return 0; 312 skb = skb2; 313 } 314 #endif 315 316 #if DUMP_PACKETS > 0 317 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, 318 skb->len, priv->lecid); 319 #if DUMP_PACKETS >= 2 320 for (i = 0; i < skb->len && i < 99; i++) { 321 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 322 } 323 #elif DUMP_PACKETS >= 1 324 for (i = 0; i < skb->len && i < 30; i++) { 325 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 326 } 327 #endif /* DUMP_PACKETS >= 1 */ 328 if (i == skb->len) 329 printk("%s\n", buf); 330 else 331 printk("%s...\n", buf); 332 #endif /* DUMP_PACKETS > 0 */ 333 334 /* Minimum ethernet-frame size */ 335 #ifdef CONFIG_TR 336 if (priv->is_trdev) 337 min_frame_size = LEC_MINIMUM_8025_SIZE; 338 else 339 #endif 340 min_frame_size = LEC_MINIMUM_8023_SIZE; 341 if (skb->len < min_frame_size) { 342 if ((skb->len + skb_tailroom(skb)) < min_frame_size) { 343 skb2 = skb_copy_expand(skb, 0, 344 min_frame_size - skb->truesize, 345 GFP_ATOMIC); 346 dev_kfree_skb(skb); 347 if (skb2 == NULL) { 348 priv->stats.tx_dropped++; 349 return 0; 350 } 351 skb = skb2; 352 } 353 skb_put(skb, min_frame_size - skb->len); 354 } 355 356 /* Send to right vcc */ 357 is_rdesc = 0; 358 dst = lec_h->h_dest; 359 #ifdef CONFIG_TR 360 if (priv->is_trdev) { 361 dst = get_tr_dst(skb->data + 2, rdesc); 362 if (dst == NULL) { 363 dst = rdesc; 364 is_rdesc = 1; 365 } 366 } 367 #endif 368 entry = NULL; 369 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); 370 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name, 371 vcc, vcc ? vcc->flags : 0, entry); 372 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { 373 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { 374 pr_debug("%s:lec_start_xmit: queuing packet, ", 375 dev->name); 376 pr_debug("MAC address %pM\n", lec_h->h_dest); 377 skb_queue_tail(&entry->tx_wait, skb); 378 } else { 379 pr_debug 380 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", 381 dev->name); 382 pr_debug("MAC address %pM\n", lec_h->h_dest); 383 priv->stats.tx_dropped++; 384 dev_kfree_skb(skb); 385 } 386 goto out; 387 } 388 #if DUMP_PACKETS > 0 389 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); 390 #endif /* DUMP_PACKETS > 0 */ 391 392 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { 393 pr_debug("lec.c: emptying tx queue, "); 394 pr_debug("MAC address %pM\n", lec_h->h_dest); 395 lec_send(vcc, skb2, priv); 396 } 397 398 lec_send(vcc, skb, priv); 399 400 if (!atm_may_send(vcc, 0)) { 401 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 402 403 vpriv->xoff = 1; 404 netif_stop_queue(dev); 405 406 /* 407 * vcc->pop() might have occurred in between, making 408 * the vcc usuable again. Since xmit is serialized, 409 * this is the only situation we have to re-test. 410 */ 411 412 if (atm_may_send(vcc, 0)) 413 netif_wake_queue(dev); 414 } 415 416 out: 417 if (entry) 418 lec_arp_put(entry); 419 dev->trans_start = jiffies; 420 return 0; 421 } 422 423 /* The inverse routine to net_open(). */ 424 static int lec_close(struct net_device *dev) 425 { 426 netif_stop_queue(dev); 427 return 0; 428 } 429 430 /* 431 * Get the current statistics. 432 * This may be called with the card open or closed. 433 */ 434 static struct net_device_stats *lec_get_stats(struct net_device *dev) 435 { 436 return &((struct lec_priv *)netdev_priv(dev))->stats; 437 } 438 439 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) 440 { 441 unsigned long flags; 442 struct net_device *dev = (struct net_device *)vcc->proto_data; 443 struct lec_priv *priv = netdev_priv(dev); 444 struct atmlec_msg *mesg; 445 struct lec_arp_table *entry; 446 int i; 447 char *tmp; /* FIXME */ 448 449 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 450 mesg = (struct atmlec_msg *)skb->data; 451 tmp = skb->data; 452 tmp += sizeof(struct atmlec_msg); 453 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); 454 switch (mesg->type) { 455 case l_set_mac_addr: 456 for (i = 0; i < 6; i++) { 457 dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; 458 } 459 break; 460 case l_del_mac_addr: 461 for (i = 0; i < 6; i++) { 462 dev->dev_addr[i] = 0; 463 } 464 break; 465 case l_addr_delete: 466 lec_addr_delete(priv, mesg->content.normal.atm_addr, 467 mesg->content.normal.flag); 468 break; 469 case l_topology_change: 470 priv->topology_change = mesg->content.normal.flag; 471 break; 472 case l_flush_complete: 473 lec_flush_complete(priv, mesg->content.normal.flag); 474 break; 475 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ 476 spin_lock_irqsave(&priv->lec_arp_lock, flags); 477 entry = lec_arp_find(priv, mesg->content.normal.mac_addr); 478 lec_arp_remove(priv, entry); 479 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 480 481 if (mesg->content.normal.no_source_le_narp) 482 break; 483 /* FALL THROUGH */ 484 case l_arp_update: 485 lec_arp_update(priv, mesg->content.normal.mac_addr, 486 mesg->content.normal.atm_addr, 487 mesg->content.normal.flag, 488 mesg->content.normal.targetless_le_arp); 489 pr_debug("lec: in l_arp_update\n"); 490 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ 491 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n", 492 mesg->sizeoftlvs); 493 lane2_associate_ind(dev, mesg->content.normal.mac_addr, 494 tmp, mesg->sizeoftlvs); 495 } 496 break; 497 case l_config: 498 priv->maximum_unknown_frame_count = 499 mesg->content.config.maximum_unknown_frame_count; 500 priv->max_unknown_frame_time = 501 (mesg->content.config.max_unknown_frame_time * HZ); 502 priv->max_retry_count = mesg->content.config.max_retry_count; 503 priv->aging_time = (mesg->content.config.aging_time * HZ); 504 priv->forward_delay_time = 505 (mesg->content.config.forward_delay_time * HZ); 506 priv->arp_response_time = 507 (mesg->content.config.arp_response_time * HZ); 508 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); 509 priv->path_switching_delay = 510 (mesg->content.config.path_switching_delay * HZ); 511 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ 512 priv->lane2_ops = NULL; 513 if (priv->lane_version > 1) 514 priv->lane2_ops = &lane2_ops; 515 if (dev->change_mtu(dev, mesg->content.config.mtu)) 516 printk("%s: change_mtu to %d failed\n", dev->name, 517 mesg->content.config.mtu); 518 priv->is_proxy = mesg->content.config.is_proxy; 519 break; 520 case l_flush_tran_id: 521 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, 522 mesg->content.normal.flag); 523 break; 524 case l_set_lecid: 525 priv->lecid = 526 (unsigned short)(0xffff & mesg->content.normal.flag); 527 break; 528 case l_should_bridge: 529 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 530 { 531 struct net_bridge_fdb_entry *f; 532 533 pr_debug("%s: bridge zeppelin asks about %pM\n", 534 dev->name, mesg->content.proxy.mac_addr); 535 536 if (br_fdb_get_hook == NULL || dev->br_port == NULL) 537 break; 538 539 f = br_fdb_get_hook(dev->br_port->br, 540 mesg->content.proxy.mac_addr); 541 if (f != NULL && f->dst->dev != dev 542 && f->dst->state == BR_STATE_FORWARDING) { 543 /* hit from bridge table, send LE_ARP_RESPONSE */ 544 struct sk_buff *skb2; 545 struct sock *sk; 546 547 pr_debug 548 ("%s: entry found, responding to zeppelin\n", 549 dev->name); 550 skb2 = 551 alloc_skb(sizeof(struct atmlec_msg), 552 GFP_ATOMIC); 553 if (skb2 == NULL) { 554 br_fdb_put_hook(f); 555 break; 556 } 557 skb2->len = sizeof(struct atmlec_msg); 558 skb_copy_to_linear_data(skb2, mesg, 559 sizeof(*mesg)); 560 atm_force_charge(priv->lecd, skb2->truesize); 561 sk = sk_atm(priv->lecd); 562 skb_queue_tail(&sk->sk_receive_queue, skb2); 563 sk->sk_data_ready(sk, skb2->len); 564 } 565 if (f != NULL) 566 br_fdb_put_hook(f); 567 } 568 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 569 break; 570 default: 571 printk("%s: Unknown message type %d\n", dev->name, mesg->type); 572 dev_kfree_skb(skb); 573 return -EINVAL; 574 } 575 dev_kfree_skb(skb); 576 return 0; 577 } 578 579 static void lec_atm_close(struct atm_vcc *vcc) 580 { 581 struct sk_buff *skb; 582 struct net_device *dev = (struct net_device *)vcc->proto_data; 583 struct lec_priv *priv = netdev_priv(dev); 584 585 priv->lecd = NULL; 586 /* Do something needful? */ 587 588 netif_stop_queue(dev); 589 lec_arp_destroy(priv); 590 591 if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) 592 printk("%s lec_atm_close: closing with messages pending\n", 593 dev->name); 594 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { 595 atm_return(vcc, skb->truesize); 596 dev_kfree_skb(skb); 597 } 598 599 printk("%s: Shut down!\n", dev->name); 600 module_put(THIS_MODULE); 601 } 602 603 static struct atmdev_ops lecdev_ops = { 604 .close = lec_atm_close, 605 .send = lec_atm_send 606 }; 607 608 static struct atm_dev lecatm_dev = { 609 .ops = &lecdev_ops, 610 .type = "lec", 611 .number = 999, /* dummy device number */ 612 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) 613 }; 614 615 /* 616 * LANE2: new argument struct sk_buff *data contains 617 * the LE_ARP based TLVs introduced in the LANE2 spec 618 */ 619 static int 620 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, 621 const unsigned char *mac_addr, const unsigned char *atm_addr, 622 struct sk_buff *data) 623 { 624 struct sock *sk; 625 struct sk_buff *skb; 626 struct atmlec_msg *mesg; 627 628 if (!priv || !priv->lecd) { 629 return -1; 630 } 631 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 632 if (!skb) 633 return -1; 634 skb->len = sizeof(struct atmlec_msg); 635 mesg = (struct atmlec_msg *)skb->data; 636 memset(mesg, 0, sizeof(struct atmlec_msg)); 637 mesg->type = type; 638 if (data != NULL) 639 mesg->sizeoftlvs = data->len; 640 if (mac_addr) 641 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); 642 else 643 mesg->content.normal.targetless_le_arp = 1; 644 if (atm_addr) 645 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); 646 647 atm_force_charge(priv->lecd, skb->truesize); 648 sk = sk_atm(priv->lecd); 649 skb_queue_tail(&sk->sk_receive_queue, skb); 650 sk->sk_data_ready(sk, skb->len); 651 652 if (data != NULL) { 653 pr_debug("lec: about to send %d bytes of data\n", data->len); 654 atm_force_charge(priv->lecd, data->truesize); 655 skb_queue_tail(&sk->sk_receive_queue, data); 656 sk->sk_data_ready(sk, skb->len); 657 } 658 659 return 0; 660 } 661 662 /* shamelessly stolen from drivers/net/net_init.c */ 663 static int lec_change_mtu(struct net_device *dev, int new_mtu) 664 { 665 if ((new_mtu < 68) || (new_mtu > 18190)) 666 return -EINVAL; 667 dev->mtu = new_mtu; 668 return 0; 669 } 670 671 static void lec_set_multicast_list(struct net_device *dev) 672 { 673 /* 674 * by default, all multicast frames arrive over the bus. 675 * eventually support selective multicast service 676 */ 677 return; 678 } 679 680 static void lec_init(struct net_device *dev) 681 { 682 dev->change_mtu = lec_change_mtu; 683 dev->open = lec_open; 684 dev->stop = lec_close; 685 dev->hard_start_xmit = lec_start_xmit; 686 dev->tx_timeout = lec_tx_timeout; 687 688 dev->get_stats = lec_get_stats; 689 dev->set_multicast_list = lec_set_multicast_list; 690 dev->do_ioctl = NULL; 691 printk("%s: Initialized!\n", dev->name); 692 } 693 694 static const unsigned char lec_ctrl_magic[] = { 695 0xff, 696 0x00, 697 0x01, 698 0x01 699 }; 700 701 #define LEC_DATA_DIRECT_8023 2 702 #define LEC_DATA_DIRECT_8025 3 703 704 static int lec_is_data_direct(struct atm_vcc *vcc) 705 { 706 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || 707 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); 708 } 709 710 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 711 { 712 unsigned long flags; 713 struct net_device *dev = (struct net_device *)vcc->proto_data; 714 struct lec_priv *priv = netdev_priv(dev); 715 716 #if DUMP_PACKETS >0 717 int i = 0; 718 char buf[300]; 719 720 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, 721 vcc->vpi, vcc->vci); 722 #endif 723 if (!skb) { 724 pr_debug("%s: null skb\n", dev->name); 725 lec_vcc_close(priv, vcc); 726 return; 727 } 728 #if DUMP_PACKETS > 0 729 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, 730 skb->len, priv->lecid); 731 #if DUMP_PACKETS >= 2 732 for (i = 0; i < skb->len && i < 99; i++) { 733 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 734 } 735 #elif DUMP_PACKETS >= 1 736 for (i = 0; i < skb->len && i < 30; i++) { 737 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 738 } 739 #endif /* DUMP_PACKETS >= 1 */ 740 if (i == skb->len) 741 printk("%s\n", buf); 742 else 743 printk("%s...\n", buf); 744 #endif /* DUMP_PACKETS > 0 */ 745 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ 746 struct sock *sk = sk_atm(vcc); 747 748 pr_debug("%s: To daemon\n", dev->name); 749 skb_queue_tail(&sk->sk_receive_queue, skb); 750 sk->sk_data_ready(sk, skb->len); 751 } else { /* Data frame, queue to protocol handlers */ 752 struct lec_arp_table *entry; 753 unsigned char *src, *dst; 754 755 atm_return(vcc, skb->truesize); 756 if (*(__be16 *) skb->data == htons(priv->lecid) || 757 !priv->lecd || !(dev->flags & IFF_UP)) { 758 /* 759 * Probably looping back, or if lecd is missing, 760 * lecd has gone down 761 */ 762 pr_debug("Ignoring frame...\n"); 763 dev_kfree_skb(skb); 764 return; 765 } 766 #ifdef CONFIG_TR 767 if (priv->is_trdev) 768 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; 769 else 770 #endif 771 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; 772 773 /* 774 * If this is a Data Direct VCC, and the VCC does not match 775 * the LE_ARP cache entry, delete the LE_ARP cache entry. 776 */ 777 spin_lock_irqsave(&priv->lec_arp_lock, flags); 778 if (lec_is_data_direct(vcc)) { 779 #ifdef CONFIG_TR 780 if (priv->is_trdev) 781 src = 782 ((struct lecdatahdr_8025 *)skb->data)-> 783 h_source; 784 else 785 #endif 786 src = 787 ((struct lecdatahdr_8023 *)skb->data)-> 788 h_source; 789 entry = lec_arp_find(priv, src); 790 if (entry && entry->vcc != vcc) { 791 lec_arp_remove(priv, entry); 792 lec_arp_put(entry); 793 } 794 } 795 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 796 797 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ 798 !priv->is_proxy && /* Proxy wants all the packets */ 799 memcmp(dst, dev->dev_addr, dev->addr_len)) { 800 dev_kfree_skb(skb); 801 return; 802 } 803 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 804 lec_arp_check_empties(priv, vcc, skb); 805 } 806 skb_pull(skb, 2); /* skip lec_id */ 807 #ifdef CONFIG_TR 808 if (priv->is_trdev) 809 skb->protocol = tr_type_trans(skb, dev); 810 else 811 #endif 812 skb->protocol = eth_type_trans(skb, dev); 813 priv->stats.rx_packets++; 814 priv->stats.rx_bytes += skb->len; 815 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 816 netif_rx(skb); 817 } 818 } 819 820 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 821 { 822 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 823 struct net_device *dev = skb->dev; 824 825 if (vpriv == NULL) { 826 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 827 return; 828 } 829 830 vpriv->old_pop(vcc, skb); 831 832 if (vpriv->xoff && atm_may_send(vcc, 0)) { 833 vpriv->xoff = 0; 834 if (netif_running(dev) && netif_queue_stopped(dev)) 835 netif_wake_queue(dev); 836 } 837 } 838 839 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 840 { 841 struct lec_vcc_priv *vpriv; 842 int bytes_left; 843 struct atmlec_ioc ioc_data; 844 845 /* Lecd must be up in this case */ 846 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 847 if (bytes_left != 0) { 848 printk 849 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 850 bytes_left); 851 } 852 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 853 !dev_lec[ioc_data.dev_num]) 854 return -EINVAL; 855 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 856 return -ENOMEM; 857 vpriv->xoff = 0; 858 vpriv->old_pop = vcc->pop; 859 vcc->user_back = vpriv; 860 vcc->pop = lec_pop; 861 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), 862 &ioc_data, vcc, vcc->push); 863 vcc->proto_data = dev_lec[ioc_data.dev_num]; 864 vcc->push = lec_push; 865 return 0; 866 } 867 868 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 869 { 870 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 871 return -EINVAL; 872 vcc->proto_data = dev_lec[arg]; 873 return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]), 874 vcc); 875 } 876 877 /* Initialize device. */ 878 static int lecd_attach(struct atm_vcc *vcc, int arg) 879 { 880 int i; 881 struct lec_priv *priv; 882 883 if (arg < 0) 884 i = 0; 885 else 886 i = arg; 887 #ifdef CONFIG_TR 888 if (arg >= MAX_LEC_ITF) 889 return -EINVAL; 890 #else /* Reserve the top NUM_TR_DEVS for TR */ 891 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 892 return -EINVAL; 893 #endif 894 if (!dev_lec[i]) { 895 int is_trdev, size; 896 897 is_trdev = 0; 898 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 899 is_trdev = 1; 900 901 size = sizeof(struct lec_priv); 902 #ifdef CONFIG_TR 903 if (is_trdev) 904 dev_lec[i] = alloc_trdev(size); 905 else 906 #endif 907 dev_lec[i] = alloc_etherdev(size); 908 if (!dev_lec[i]) 909 return -ENOMEM; 910 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 911 if (register_netdev(dev_lec[i])) { 912 free_netdev(dev_lec[i]); 913 return -EINVAL; 914 } 915 916 priv = netdev_priv(dev_lec[i]); 917 priv->is_trdev = is_trdev; 918 lec_init(dev_lec[i]); 919 } else { 920 priv = netdev_priv(dev_lec[i]); 921 if (priv->lecd) 922 return -EADDRINUSE; 923 } 924 lec_arp_init(priv); 925 priv->itfnum = i; /* LANE2 addition */ 926 priv->lecd = vcc; 927 vcc->dev = &lecatm_dev; 928 vcc_insert_socket(sk_atm(vcc)); 929 930 vcc->proto_data = dev_lec[i]; 931 set_bit(ATM_VF_META, &vcc->flags); 932 set_bit(ATM_VF_READY, &vcc->flags); 933 934 /* Set default values to these variables */ 935 priv->maximum_unknown_frame_count = 1; 936 priv->max_unknown_frame_time = (1 * HZ); 937 priv->vcc_timeout_period = (1200 * HZ); 938 priv->max_retry_count = 1; 939 priv->aging_time = (300 * HZ); 940 priv->forward_delay_time = (15 * HZ); 941 priv->topology_change = 0; 942 priv->arp_response_time = (1 * HZ); 943 priv->flush_timeout = (4 * HZ); 944 priv->path_switching_delay = (6 * HZ); 945 946 if (dev_lec[i]->flags & IFF_UP) { 947 netif_start_queue(dev_lec[i]); 948 } 949 __module_get(THIS_MODULE); 950 return i; 951 } 952 953 #ifdef CONFIG_PROC_FS 954 static char *lec_arp_get_status_string(unsigned char status) 955 { 956 static char *lec_arp_status_string[] = { 957 "ESI_UNKNOWN ", 958 "ESI_ARP_PENDING ", 959 "ESI_VC_PENDING ", 960 "<Undefined> ", 961 "ESI_FLUSH_PENDING ", 962 "ESI_FORWARD_DIRECT" 963 }; 964 965 if (status > ESI_FORWARD_DIRECT) 966 status = 3; /* ESI_UNDEFINED */ 967 return lec_arp_status_string[status]; 968 } 969 970 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 971 { 972 int i; 973 974 for (i = 0; i < ETH_ALEN; i++) 975 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 976 seq_printf(seq, " "); 977 for (i = 0; i < ATM_ESA_LEN; i++) 978 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 979 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 980 entry->flags & 0xffff); 981 if (entry->vcc) 982 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 983 else 984 seq_printf(seq, " "); 985 if (entry->recv_vcc) { 986 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 987 entry->recv_vcc->vci); 988 } 989 seq_putc(seq, '\n'); 990 } 991 992 struct lec_state { 993 unsigned long flags; 994 struct lec_priv *locked; 995 struct hlist_node *node; 996 struct net_device *dev; 997 int itf; 998 int arp_table; 999 int misc_table; 1000 }; 1001 1002 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1003 loff_t *l) 1004 { 1005 struct hlist_node *e = state->node; 1006 struct lec_arp_table *tmp; 1007 1008 if (!e) 1009 e = tbl->first; 1010 if (e == SEQ_START_TOKEN) { 1011 e = tbl->first; 1012 --*l; 1013 } 1014 1015 hlist_for_each_entry_from(tmp, e, next) { 1016 if (--*l < 0) 1017 break; 1018 } 1019 state->node = e; 1020 1021 return (*l < 0) ? state : NULL; 1022 } 1023 1024 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1025 struct lec_priv *priv) 1026 { 1027 void *v = NULL; 1028 int p; 1029 1030 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1031 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1032 if (v) 1033 break; 1034 } 1035 state->arp_table = p; 1036 return v; 1037 } 1038 1039 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1040 struct lec_priv *priv) 1041 { 1042 struct hlist_head *lec_misc_tables[] = { 1043 &priv->lec_arp_empty_ones, 1044 &priv->lec_no_forward, 1045 &priv->mcast_fwds 1046 }; 1047 void *v = NULL; 1048 int q; 1049 1050 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1051 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1052 if (v) 1053 break; 1054 } 1055 state->misc_table = q; 1056 return v; 1057 } 1058 1059 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1060 struct lec_priv *priv) 1061 { 1062 if (!state->locked) { 1063 state->locked = priv; 1064 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1065 } 1066 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1067 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1068 state->locked = NULL; 1069 /* Partial state reset for the next time we get called */ 1070 state->arp_table = state->misc_table = 0; 1071 } 1072 return state->locked; 1073 } 1074 1075 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1076 { 1077 struct net_device *dev; 1078 void *v; 1079 1080 dev = state->dev ? state->dev : dev_lec[state->itf]; 1081 v = (dev && netdev_priv(dev)) ? 1082 lec_priv_walk(state, l, netdev_priv(dev)) : NULL; 1083 if (!v && dev) { 1084 dev_put(dev); 1085 /* Partial state reset for the next time we get called */ 1086 dev = NULL; 1087 } 1088 state->dev = dev; 1089 return v; 1090 } 1091 1092 static void *lec_get_idx(struct lec_state *state, loff_t l) 1093 { 1094 void *v = NULL; 1095 1096 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1097 v = lec_itf_walk(state, &l); 1098 if (v) 1099 break; 1100 } 1101 return v; 1102 } 1103 1104 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1105 { 1106 struct lec_state *state = seq->private; 1107 1108 state->itf = 0; 1109 state->dev = NULL; 1110 state->locked = NULL; 1111 state->arp_table = 0; 1112 state->misc_table = 0; 1113 state->node = SEQ_START_TOKEN; 1114 1115 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; 1116 } 1117 1118 static void lec_seq_stop(struct seq_file *seq, void *v) 1119 { 1120 struct lec_state *state = seq->private; 1121 1122 if (state->dev) { 1123 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1124 state->flags); 1125 dev_put(state->dev); 1126 } 1127 } 1128 1129 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1130 { 1131 struct lec_state *state = seq->private; 1132 1133 v = lec_get_idx(state, 1); 1134 *pos += !!PTR_ERR(v); 1135 return v; 1136 } 1137 1138 static int lec_seq_show(struct seq_file *seq, void *v) 1139 { 1140 static char lec_banner[] = "Itf MAC ATM destination" 1141 " Status Flags " 1142 "VPI/VCI Recv VPI/VCI\n"; 1143 1144 if (v == SEQ_START_TOKEN) 1145 seq_puts(seq, lec_banner); 1146 else { 1147 struct lec_state *state = seq->private; 1148 struct net_device *dev = state->dev; 1149 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1150 1151 seq_printf(seq, "%s ", dev->name); 1152 lec_info(seq, entry); 1153 } 1154 return 0; 1155 } 1156 1157 static const struct seq_operations lec_seq_ops = { 1158 .start = lec_seq_start, 1159 .next = lec_seq_next, 1160 .stop = lec_seq_stop, 1161 .show = lec_seq_show, 1162 }; 1163 1164 static int lec_seq_open(struct inode *inode, struct file *file) 1165 { 1166 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); 1167 } 1168 1169 static const struct file_operations lec_seq_fops = { 1170 .owner = THIS_MODULE, 1171 .open = lec_seq_open, 1172 .read = seq_read, 1173 .llseek = seq_lseek, 1174 .release = seq_release_private, 1175 }; 1176 #endif 1177 1178 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1179 { 1180 struct atm_vcc *vcc = ATM_SD(sock); 1181 int err = 0; 1182 1183 switch (cmd) { 1184 case ATMLEC_CTRL: 1185 case ATMLEC_MCAST: 1186 case ATMLEC_DATA: 1187 if (!capable(CAP_NET_ADMIN)) 1188 return -EPERM; 1189 break; 1190 default: 1191 return -ENOIOCTLCMD; 1192 } 1193 1194 switch (cmd) { 1195 case ATMLEC_CTRL: 1196 err = lecd_attach(vcc, (int)arg); 1197 if (err >= 0) 1198 sock->state = SS_CONNECTED; 1199 break; 1200 case ATMLEC_MCAST: 1201 err = lec_mcast_attach(vcc, (int)arg); 1202 break; 1203 case ATMLEC_DATA: 1204 err = lec_vcc_attach(vcc, (void __user *)arg); 1205 break; 1206 } 1207 1208 return err; 1209 } 1210 1211 static struct atm_ioctl lane_ioctl_ops = { 1212 .owner = THIS_MODULE, 1213 .ioctl = lane_ioctl, 1214 }; 1215 1216 static int __init lane_module_init(void) 1217 { 1218 #ifdef CONFIG_PROC_FS 1219 struct proc_dir_entry *p; 1220 1221 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); 1222 if (!p) { 1223 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n"); 1224 return -ENOMEM; 1225 } 1226 #endif 1227 1228 register_atm_ioctl(&lane_ioctl_ops); 1229 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1230 return 0; 1231 } 1232 1233 static void __exit lane_module_cleanup(void) 1234 { 1235 int i; 1236 struct lec_priv *priv; 1237 1238 remove_proc_entry("lec", atm_proc_root); 1239 1240 deregister_atm_ioctl(&lane_ioctl_ops); 1241 1242 for (i = 0; i < MAX_LEC_ITF; i++) { 1243 if (dev_lec[i] != NULL) { 1244 priv = netdev_priv(dev_lec[i]); 1245 unregister_netdev(dev_lec[i]); 1246 free_netdev(dev_lec[i]); 1247 dev_lec[i] = NULL; 1248 } 1249 } 1250 1251 return; 1252 } 1253 1254 module_init(lane_module_init); 1255 module_exit(lane_module_cleanup); 1256 1257 /* 1258 * LANE2: 3.1.3, LE_RESOLVE.request 1259 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1260 * If sizeoftlvs == NULL the default TLVs associated with with this 1261 * lec will be used. 1262 * If dst_mac == NULL, targetless LE_ARP will be sent 1263 */ 1264 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, 1265 u8 **tlvs, u32 *sizeoftlvs) 1266 { 1267 unsigned long flags; 1268 struct lec_priv *priv = netdev_priv(dev); 1269 struct lec_arp_table *table; 1270 struct sk_buff *skb; 1271 int retval; 1272 1273 if (force == 0) { 1274 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1275 table = lec_arp_find(priv, dst_mac); 1276 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1277 if (table == NULL) 1278 return -1; 1279 1280 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1281 if (*tlvs == NULL) 1282 return -1; 1283 1284 *sizeoftlvs = table->sizeoftlvs; 1285 1286 return 0; 1287 } 1288 1289 if (sizeoftlvs == NULL) 1290 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1291 1292 else { 1293 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1294 if (skb == NULL) 1295 return -1; 1296 skb->len = *sizeoftlvs; 1297 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); 1298 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1299 } 1300 return retval; 1301 } 1302 1303 /* 1304 * LANE2: 3.1.4, LE_ASSOCIATE.request 1305 * Associate the *tlvs with the *lan_dst address. 1306 * Will overwrite any previous association 1307 * Returns 1 for success, 0 for failure (out of memory) 1308 * 1309 */ 1310 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, 1311 const u8 *tlvs, u32 sizeoftlvs) 1312 { 1313 int retval; 1314 struct sk_buff *skb; 1315 struct lec_priv *priv = netdev_priv(dev); 1316 1317 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1318 return (0); /* not our mac address */ 1319 1320 kfree(priv->tlvs); /* NULL if there was no previous association */ 1321 1322 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1323 if (priv->tlvs == NULL) 1324 return (0); 1325 priv->sizeoftlvs = sizeoftlvs; 1326 1327 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1328 if (skb == NULL) 1329 return 0; 1330 skb->len = sizeoftlvs; 1331 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); 1332 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1333 if (retval != 0) 1334 printk("lec.c: lane2_associate_req() failed\n"); 1335 /* 1336 * If the previous association has changed we must 1337 * somehow notify other LANE entities about the change 1338 */ 1339 return (1); 1340 } 1341 1342 /* 1343 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1344 * 1345 */ 1346 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, 1347 const u8 *tlvs, u32 sizeoftlvs) 1348 { 1349 #if 0 1350 int i = 0; 1351 #endif 1352 struct lec_priv *priv = netdev_priv(dev); 1353 #if 0 /* 1354 * Why have the TLVs in LE_ARP entries 1355 * since we do not use them? When you 1356 * uncomment this code, make sure the 1357 * TLVs get freed when entry is killed 1358 */ 1359 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1360 1361 if (entry == NULL) 1362 return; /* should not happen */ 1363 1364 kfree(entry->tlvs); 1365 1366 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1367 if (entry->tlvs == NULL) 1368 return; 1369 entry->sizeoftlvs = sizeoftlvs; 1370 #endif 1371 #if 0 1372 printk("lec.c: lane2_associate_ind()\n"); 1373 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1374 while (i < sizeoftlvs) 1375 printk("%02x ", tlvs[i++]); 1376 1377 printk("\n"); 1378 #endif 1379 1380 /* tell MPOA about the TLVs we saw */ 1381 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1382 priv->lane2_ops->associate_indicator(dev, mac_addr, 1383 tlvs, sizeoftlvs); 1384 } 1385 return; 1386 } 1387 1388 /* 1389 * Here starts what used to lec_arpc.c 1390 * 1391 * lec_arpc.c was added here when making 1392 * lane client modular. October 1997 1393 */ 1394 1395 #include <linux/types.h> 1396 #include <linux/timer.h> 1397 #include <asm/param.h> 1398 #include <asm/atomic.h> 1399 #include <linux/inetdevice.h> 1400 #include <net/route.h> 1401 1402 #if 0 1403 #define pr_debug(format,args...) 1404 /* 1405 #define pr_debug printk 1406 */ 1407 #endif 1408 #define DEBUG_ARP_TABLE 0 1409 1410 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1411 1412 static void lec_arp_check_expire(struct work_struct *work); 1413 static void lec_arp_expire_arp(unsigned long data); 1414 1415 /* 1416 * Arp table funcs 1417 */ 1418 1419 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1420 1421 /* 1422 * Initialization of arp-cache 1423 */ 1424 static void lec_arp_init(struct lec_priv *priv) 1425 { 1426 unsigned short i; 1427 1428 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1429 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1430 } 1431 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1432 INIT_HLIST_HEAD(&priv->lec_no_forward); 1433 INIT_HLIST_HEAD(&priv->mcast_fwds); 1434 spin_lock_init(&priv->lec_arp_lock); 1435 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1436 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1437 } 1438 1439 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1440 { 1441 if (entry->vcc) { 1442 struct atm_vcc *vcc = entry->vcc; 1443 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1444 struct net_device *dev = (struct net_device *)vcc->proto_data; 1445 1446 vcc->pop = vpriv->old_pop; 1447 if (vpriv->xoff) 1448 netif_wake_queue(dev); 1449 kfree(vpriv); 1450 vcc->user_back = NULL; 1451 vcc->push = entry->old_push; 1452 vcc_release_async(vcc, -EPIPE); 1453 entry->vcc = NULL; 1454 } 1455 if (entry->recv_vcc) { 1456 entry->recv_vcc->push = entry->old_recv_push; 1457 vcc_release_async(entry->recv_vcc, -EPIPE); 1458 entry->recv_vcc = NULL; 1459 } 1460 } 1461 1462 /* 1463 * Insert entry to lec_arp_table 1464 * LANE2: Add to the end of the list to satisfy 8.1.13 1465 */ 1466 static inline void 1467 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1468 { 1469 struct hlist_head *tmp; 1470 1471 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1472 hlist_add_head(&entry->next, tmp); 1473 1474 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1475 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1476 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1477 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1478 } 1479 1480 /* 1481 * Remove entry from lec_arp_table 1482 */ 1483 static int 1484 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1485 { 1486 struct hlist_node *node; 1487 struct lec_arp_table *entry; 1488 int i, remove_vcc = 1; 1489 1490 if (!to_remove) { 1491 return -1; 1492 } 1493 1494 hlist_del(&to_remove->next); 1495 del_timer(&to_remove->timer); 1496 1497 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1498 if (to_remove->status >= ESI_FLUSH_PENDING) { 1499 /* 1500 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1501 */ 1502 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1503 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1504 if (memcmp(to_remove->atm_addr, 1505 entry->atm_addr, ATM_ESA_LEN) == 0) { 1506 remove_vcc = 0; 1507 break; 1508 } 1509 } 1510 } 1511 if (remove_vcc) 1512 lec_arp_clear_vccs(to_remove); 1513 } 1514 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1515 1516 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1517 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1518 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1519 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1520 return 0; 1521 } 1522 1523 #if DEBUG_ARP_TABLE 1524 static char *get_status_string(unsigned char st) 1525 { 1526 switch (st) { 1527 case ESI_UNKNOWN: 1528 return "ESI_UNKNOWN"; 1529 case ESI_ARP_PENDING: 1530 return "ESI_ARP_PENDING"; 1531 case ESI_VC_PENDING: 1532 return "ESI_VC_PENDING"; 1533 case ESI_FLUSH_PENDING: 1534 return "ESI_FLUSH_PENDING"; 1535 case ESI_FORWARD_DIRECT: 1536 return "ESI_FORWARD_DIRECT"; 1537 default: 1538 return "<UNKNOWN>"; 1539 } 1540 } 1541 1542 static void dump_arp_table(struct lec_priv *priv) 1543 { 1544 struct hlist_node *node; 1545 struct lec_arp_table *rulla; 1546 char buf[256]; 1547 int i, j, offset; 1548 1549 printk("Dump %p:\n", priv); 1550 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1551 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1552 offset = 0; 1553 offset += sprintf(buf, "%d: %p\n", i, rulla); 1554 offset += sprintf(buf + offset, "Mac:"); 1555 for (j = 0; j < ETH_ALEN; j++) { 1556 offset += sprintf(buf + offset, 1557 "%2.2x ", 1558 rulla->mac_addr[j] & 0xff); 1559 } 1560 offset += sprintf(buf + offset, "Atm:"); 1561 for (j = 0; j < ATM_ESA_LEN; j++) { 1562 offset += sprintf(buf + offset, 1563 "%2.2x ", 1564 rulla->atm_addr[j] & 0xff); 1565 } 1566 offset += sprintf(buf + offset, 1567 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1568 rulla->vcc ? rulla->vcc->vpi : 0, 1569 rulla->vcc ? rulla->vcc->vci : 0, 1570 rulla->recv_vcc ? rulla->recv_vcc-> 1571 vpi : 0, 1572 rulla->recv_vcc ? rulla->recv_vcc-> 1573 vci : 0, rulla->last_used, 1574 rulla->timestamp, rulla->no_tries); 1575 offset += 1576 sprintf(buf + offset, 1577 "Flags:%x, Packets_flooded:%x, Status: %s ", 1578 rulla->flags, rulla->packets_flooded, 1579 get_status_string(rulla->status)); 1580 printk("%s\n", buf); 1581 } 1582 } 1583 1584 if (!hlist_empty(&priv->lec_no_forward)) 1585 printk("No forward\n"); 1586 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1587 offset = 0; 1588 offset += sprintf(buf + offset, "Mac:"); 1589 for (j = 0; j < ETH_ALEN; j++) { 1590 offset += sprintf(buf + offset, "%2.2x ", 1591 rulla->mac_addr[j] & 0xff); 1592 } 1593 offset += sprintf(buf + offset, "Atm:"); 1594 for (j = 0; j < ATM_ESA_LEN; j++) { 1595 offset += sprintf(buf + offset, "%2.2x ", 1596 rulla->atm_addr[j] & 0xff); 1597 } 1598 offset += sprintf(buf + offset, 1599 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1600 rulla->vcc ? rulla->vcc->vpi : 0, 1601 rulla->vcc ? rulla->vcc->vci : 0, 1602 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1603 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1604 rulla->last_used, 1605 rulla->timestamp, rulla->no_tries); 1606 offset += sprintf(buf + offset, 1607 "Flags:%x, Packets_flooded:%x, Status: %s ", 1608 rulla->flags, rulla->packets_flooded, 1609 get_status_string(rulla->status)); 1610 printk("%s\n", buf); 1611 } 1612 1613 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1614 printk("Empty ones\n"); 1615 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, 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", buf); 1640 } 1641 1642 if (!hlist_empty(&priv->mcast_fwds)) 1643 printk("Multicast Forward VCCs\n"); 1644 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, 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\n", buf); 1669 } 1670 1671 } 1672 #else 1673 #define dump_arp_table(priv) do { } while (0) 1674 #endif 1675 1676 /* 1677 * Destruction of arp-cache 1678 */ 1679 static void lec_arp_destroy(struct lec_priv *priv) 1680 { 1681 unsigned long flags; 1682 struct hlist_node *node, *next; 1683 struct lec_arp_table *entry; 1684 int i; 1685 1686 cancel_rearming_delayed_work(&priv->lec_arp_work); 1687 1688 /* 1689 * Remove all entries 1690 */ 1691 1692 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1693 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1694 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1695 lec_arp_remove(priv, entry); 1696 lec_arp_put(entry); 1697 } 1698 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1699 } 1700 1701 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, 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_arp_empty_ones); 1708 1709 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1710 del_timer_sync(&entry->timer); 1711 lec_arp_clear_vccs(entry); 1712 hlist_del(&entry->next); 1713 lec_arp_put(entry); 1714 } 1715 INIT_HLIST_HEAD(&priv->lec_no_forward); 1716 1717 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1718 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1719 lec_arp_clear_vccs(entry); 1720 hlist_del(&entry->next); 1721 lec_arp_put(entry); 1722 } 1723 INIT_HLIST_HEAD(&priv->mcast_fwds); 1724 priv->mcast_vcc = NULL; 1725 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1726 } 1727 1728 /* 1729 * Find entry by mac_address 1730 */ 1731 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1732 const unsigned char *mac_addr) 1733 { 1734 struct hlist_node *node; 1735 struct hlist_head *head; 1736 struct lec_arp_table *entry; 1737 1738 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1739 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1740 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1741 1742 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1743 hlist_for_each_entry(entry, node, head, next) { 1744 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1745 return entry; 1746 } 1747 } 1748 return NULL; 1749 } 1750 1751 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1752 const unsigned char *mac_addr) 1753 { 1754 struct lec_arp_table *to_return; 1755 1756 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1757 if (!to_return) { 1758 printk("LEC: Arp entry kmalloc failed\n"); 1759 return NULL; 1760 } 1761 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1762 INIT_HLIST_NODE(&to_return->next); 1763 setup_timer(&to_return->timer, lec_arp_expire_arp, 1764 (unsigned long)to_return); 1765 to_return->last_used = jiffies; 1766 to_return->priv = priv; 1767 skb_queue_head_init(&to_return->tx_wait); 1768 atomic_set(&to_return->usage, 1); 1769 return to_return; 1770 } 1771 1772 /* Arp sent timer expired */ 1773 static void lec_arp_expire_arp(unsigned long data) 1774 { 1775 struct lec_arp_table *entry; 1776 1777 entry = (struct lec_arp_table *)data; 1778 1779 pr_debug("lec_arp_expire_arp\n"); 1780 if (entry->status == ESI_ARP_PENDING) { 1781 if (entry->no_tries <= entry->priv->max_retry_count) { 1782 if (entry->is_rdesc) 1783 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1784 entry->mac_addr, NULL, NULL); 1785 else 1786 send_to_lecd(entry->priv, l_arp_xmt, 1787 entry->mac_addr, NULL, NULL); 1788 entry->no_tries++; 1789 } 1790 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1791 } 1792 } 1793 1794 /* Unknown/unused vcc expire, remove associated entry */ 1795 static void lec_arp_expire_vcc(unsigned long data) 1796 { 1797 unsigned long flags; 1798 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1799 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1800 1801 del_timer(&to_remove->timer); 1802 1803 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1804 to_remove, priv, 1805 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1806 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1807 1808 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1809 hlist_del(&to_remove->next); 1810 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1811 1812 lec_arp_clear_vccs(to_remove); 1813 lec_arp_put(to_remove); 1814 } 1815 1816 /* 1817 * Expire entries. 1818 * 1. Re-set timer 1819 * 2. For each entry, delete entries that have aged past the age limit. 1820 * 3. For each entry, depending on the status of the entry, perform 1821 * the following maintenance. 1822 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1823 * tick_count is above the max_unknown_frame_time, clear 1824 * the tick_count to zero and clear the packets_flooded counter 1825 * to zero. This supports the packet rate limit per address 1826 * while flooding unknowns. 1827 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1828 * than or equal to the path_switching_delay, change the status 1829 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1830 * regardless of the progress of the flush protocol. 1831 */ 1832 static void lec_arp_check_expire(struct work_struct *work) 1833 { 1834 unsigned long flags; 1835 struct lec_priv *priv = 1836 container_of(work, struct lec_priv, lec_arp_work.work); 1837 struct hlist_node *node, *next; 1838 struct lec_arp_table *entry; 1839 unsigned long now; 1840 unsigned long time_to_check; 1841 int i; 1842 1843 pr_debug("lec_arp_check_expire %p\n", priv); 1844 now = jiffies; 1845 restart: 1846 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1847 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1848 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1849 if ((entry->flags) & LEC_REMOTE_FLAG && 1850 priv->topology_change) 1851 time_to_check = priv->forward_delay_time; 1852 else 1853 time_to_check = priv->aging_time; 1854 1855 pr_debug("About to expire: %lx - %lx > %lx\n", 1856 now, entry->last_used, time_to_check); 1857 if (time_after(now, entry->last_used + time_to_check) 1858 && !(entry->flags & LEC_PERMANENT_FLAG) 1859 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1860 /* Remove entry */ 1861 pr_debug("LEC:Entry timed out\n"); 1862 lec_arp_remove(priv, entry); 1863 lec_arp_put(entry); 1864 } else { 1865 /* Something else */ 1866 if ((entry->status == ESI_VC_PENDING || 1867 entry->status == ESI_ARP_PENDING) 1868 && time_after_eq(now, 1869 entry->timestamp + 1870 priv-> 1871 max_unknown_frame_time)) { 1872 entry->timestamp = jiffies; 1873 entry->packets_flooded = 0; 1874 if (entry->status == ESI_VC_PENDING) 1875 send_to_lecd(priv, l_svc_setup, 1876 entry->mac_addr, 1877 entry->atm_addr, 1878 NULL); 1879 } 1880 if (entry->status == ESI_FLUSH_PENDING 1881 && 1882 time_after_eq(now, entry->timestamp + 1883 priv->path_switching_delay)) { 1884 struct sk_buff *skb; 1885 struct atm_vcc *vcc = entry->vcc; 1886 1887 lec_arp_hold(entry); 1888 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1889 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1890 lec_send(vcc, skb, entry->priv); 1891 entry->last_used = jiffies; 1892 entry->status = ESI_FORWARD_DIRECT; 1893 lec_arp_put(entry); 1894 goto restart; 1895 } 1896 } 1897 } 1898 } 1899 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1900 1901 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1902 } 1903 1904 /* 1905 * Try to find vcc where mac_address is attached. 1906 * 1907 */ 1908 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1909 const unsigned char *mac_to_find, int is_rdesc, 1910 struct lec_arp_table **ret_entry) 1911 { 1912 unsigned long flags; 1913 struct lec_arp_table *entry; 1914 struct atm_vcc *found; 1915 1916 if (mac_to_find[0] & 0x01) { 1917 switch (priv->lane_version) { 1918 case 1: 1919 return priv->mcast_vcc; 1920 case 2: /* LANE2 wants arp for multicast addresses */ 1921 if (!compare_ether_addr(mac_to_find, bus_mac)) 1922 return priv->mcast_vcc; 1923 break; 1924 default: 1925 break; 1926 } 1927 } 1928 1929 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1930 entry = lec_arp_find(priv, mac_to_find); 1931 1932 if (entry) { 1933 if (entry->status == ESI_FORWARD_DIRECT) { 1934 /* Connection Ok */ 1935 entry->last_used = jiffies; 1936 lec_arp_hold(entry); 1937 *ret_entry = entry; 1938 found = entry->vcc; 1939 goto out; 1940 } 1941 /* 1942 * If the LE_ARP cache entry is still pending, reset count to 0 1943 * so another LE_ARP request can be made for this frame. 1944 */ 1945 if (entry->status == ESI_ARP_PENDING) { 1946 entry->no_tries = 0; 1947 } 1948 /* 1949 * Data direct VC not yet set up, check to see if the unknown 1950 * frame count is greater than the limit. If the limit has 1951 * not been reached, allow the caller to send packet to 1952 * BUS. 1953 */ 1954 if (entry->status != ESI_FLUSH_PENDING && 1955 entry->packets_flooded < 1956 priv->maximum_unknown_frame_count) { 1957 entry->packets_flooded++; 1958 pr_debug("LEC_ARP: Flooding..\n"); 1959 found = priv->mcast_vcc; 1960 goto out; 1961 } 1962 /* 1963 * We got here because entry->status == ESI_FLUSH_PENDING 1964 * or BUS flood limit was reached for an entry which is 1965 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 1966 */ 1967 lec_arp_hold(entry); 1968 *ret_entry = entry; 1969 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status, 1970 entry->vcc); 1971 found = NULL; 1972 } else { 1973 /* No matching entry was found */ 1974 entry = make_entry(priv, mac_to_find); 1975 pr_debug("LEC_ARP: Making entry\n"); 1976 if (!entry) { 1977 found = priv->mcast_vcc; 1978 goto out; 1979 } 1980 lec_arp_add(priv, entry); 1981 /* We want arp-request(s) to be sent */ 1982 entry->packets_flooded = 1; 1983 entry->status = ESI_ARP_PENDING; 1984 entry->no_tries = 1; 1985 entry->last_used = entry->timestamp = jiffies; 1986 entry->is_rdesc = is_rdesc; 1987 if (entry->is_rdesc) 1988 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 1989 NULL); 1990 else 1991 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 1992 entry->timer.expires = jiffies + (1 * HZ); 1993 entry->timer.function = lec_arp_expire_arp; 1994 add_timer(&entry->timer); 1995 found = priv->mcast_vcc; 1996 } 1997 1998 out: 1999 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2000 return found; 2001 } 2002 2003 static int 2004 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, 2005 unsigned long permanent) 2006 { 2007 unsigned long flags; 2008 struct hlist_node *node, *next; 2009 struct lec_arp_table *entry; 2010 int i; 2011 2012 pr_debug("lec_addr_delete\n"); 2013 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2014 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2015 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2016 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2017 && (permanent || 2018 !(entry->flags & LEC_PERMANENT_FLAG))) { 2019 lec_arp_remove(priv, entry); 2020 lec_arp_put(entry); 2021 } 2022 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2023 return 0; 2024 } 2025 } 2026 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2027 return -1; 2028 } 2029 2030 /* 2031 * Notifies: Response to arp_request (atm_addr != NULL) 2032 */ 2033 static void 2034 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, 2035 const unsigned char *atm_addr, unsigned long remoteflag, 2036 unsigned int targetless_le_arp) 2037 { 2038 unsigned long flags; 2039 struct hlist_node *node, *next; 2040 struct lec_arp_table *entry, *tmp; 2041 int i; 2042 2043 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2044 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2045 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2046 mac_addr[4], mac_addr[5]); 2047 2048 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2049 entry = lec_arp_find(priv, mac_addr); 2050 if (entry == NULL && targetless_le_arp) 2051 goto out; /* 2052 * LANE2: ignore targetless LE_ARPs for which 2053 * we have no entry in the cache. 7.1.30 2054 */ 2055 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2056 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2057 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2058 hlist_del(&entry->next); 2059 del_timer(&entry->timer); 2060 tmp = lec_arp_find(priv, mac_addr); 2061 if (tmp) { 2062 del_timer(&tmp->timer); 2063 tmp->status = ESI_FORWARD_DIRECT; 2064 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2065 tmp->vcc = entry->vcc; 2066 tmp->old_push = entry->old_push; 2067 tmp->last_used = jiffies; 2068 del_timer(&entry->timer); 2069 lec_arp_put(entry); 2070 entry = tmp; 2071 } else { 2072 entry->status = ESI_FORWARD_DIRECT; 2073 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2074 entry->last_used = jiffies; 2075 lec_arp_add(priv, entry); 2076 } 2077 if (remoteflag) 2078 entry->flags |= LEC_REMOTE_FLAG; 2079 else 2080 entry->flags &= ~LEC_REMOTE_FLAG; 2081 pr_debug("After update\n"); 2082 dump_arp_table(priv); 2083 goto out; 2084 } 2085 } 2086 } 2087 2088 entry = lec_arp_find(priv, mac_addr); 2089 if (!entry) { 2090 entry = make_entry(priv, mac_addr); 2091 if (!entry) 2092 goto out; 2093 entry->status = ESI_UNKNOWN; 2094 lec_arp_add(priv, entry); 2095 /* Temporary, changes before end of function */ 2096 } 2097 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2098 del_timer(&entry->timer); 2099 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2100 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2101 if (entry != tmp && 2102 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2103 /* Vcc to this host exists */ 2104 if (tmp->status > ESI_VC_PENDING) { 2105 /* 2106 * ESI_FLUSH_PENDING, 2107 * ESI_FORWARD_DIRECT 2108 */ 2109 entry->vcc = tmp->vcc; 2110 entry->old_push = tmp->old_push; 2111 } 2112 entry->status = tmp->status; 2113 break; 2114 } 2115 } 2116 } 2117 if (remoteflag) 2118 entry->flags |= LEC_REMOTE_FLAG; 2119 else 2120 entry->flags &= ~LEC_REMOTE_FLAG; 2121 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2122 entry->status = ESI_VC_PENDING; 2123 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2124 } 2125 pr_debug("After update2\n"); 2126 dump_arp_table(priv); 2127 out: 2128 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2129 } 2130 2131 /* 2132 * Notifies: Vcc setup ready 2133 */ 2134 static void 2135 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, 2136 struct atm_vcc *vcc, 2137 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2138 { 2139 unsigned long flags; 2140 struct hlist_node *node; 2141 struct lec_arp_table *entry; 2142 int i, found_entry = 0; 2143 2144 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2145 if (ioc_data->receive == 2) { 2146 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2147 2148 pr_debug("LEC_ARP: Attaching mcast forward\n"); 2149 #if 0 2150 entry = lec_arp_find(priv, bus_mac); 2151 if (!entry) { 2152 printk("LEC_ARP: Multicast entry not found!\n"); 2153 goto out; 2154 } 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 #endif 2159 entry = make_entry(priv, bus_mac); 2160 if (entry == NULL) 2161 goto out; 2162 del_timer(&entry->timer); 2163 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2164 entry->recv_vcc = vcc; 2165 entry->old_recv_push = old_push; 2166 hlist_add_head(&entry->next, &priv->mcast_fwds); 2167 goto out; 2168 } else if (ioc_data->receive == 1) { 2169 /* 2170 * Vcc which we don't want to make default vcc, 2171 * attach it anyway. 2172 */ 2173 pr_debug 2174 ("LEC_ARP:Attaching data direct, not default: " 2175 "%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", 2176 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2177 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2178 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2179 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2180 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2181 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2182 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2183 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2184 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2185 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2186 entry = make_entry(priv, bus_mac); 2187 if (entry == NULL) 2188 goto out; 2189 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2190 memset(entry->mac_addr, 0, ETH_ALEN); 2191 entry->recv_vcc = vcc; 2192 entry->old_recv_push = old_push; 2193 entry->status = ESI_UNKNOWN; 2194 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2195 entry->timer.function = lec_arp_expire_vcc; 2196 hlist_add_head(&entry->next, &priv->lec_no_forward); 2197 add_timer(&entry->timer); 2198 dump_arp_table(priv); 2199 goto out; 2200 } 2201 pr_debug 2202 ("LEC_ARP:Attaching data direct, default: " 2203 "%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", 2204 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2205 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2206 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2207 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2208 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2209 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2210 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2211 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2212 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2213 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2214 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2215 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2216 if (memcmp 2217 (ioc_data->atm_addr, entry->atm_addr, 2218 ATM_ESA_LEN) == 0) { 2219 pr_debug("LEC_ARP: Attaching data direct\n"); 2220 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", 2221 entry->vcc ? entry->vcc->vci : 0, 2222 entry->recv_vcc ? entry->recv_vcc-> 2223 vci : 0); 2224 found_entry = 1; 2225 del_timer(&entry->timer); 2226 entry->vcc = vcc; 2227 entry->old_push = old_push; 2228 if (entry->status == ESI_VC_PENDING) { 2229 if (priv->maximum_unknown_frame_count 2230 == 0) 2231 entry->status = 2232 ESI_FORWARD_DIRECT; 2233 else { 2234 entry->timestamp = jiffies; 2235 entry->status = 2236 ESI_FLUSH_PENDING; 2237 #if 0 2238 send_to_lecd(priv, l_flush_xmt, 2239 NULL, 2240 entry->atm_addr, 2241 NULL); 2242 #endif 2243 } 2244 } else { 2245 /* 2246 * They were forming a connection 2247 * to us, and we to them. Our 2248 * ATM address is numerically lower 2249 * than theirs, so we make connection 2250 * we formed into default VCC (8.1.11). 2251 * Connection they made gets torn 2252 * down. This might confuse some 2253 * clients. Can be changed if 2254 * someone reports trouble... 2255 */ 2256 ; 2257 } 2258 } 2259 } 2260 } 2261 if (found_entry) { 2262 pr_debug("After vcc was added\n"); 2263 dump_arp_table(priv); 2264 goto out; 2265 } 2266 /* 2267 * Not found, snatch address from first data packet that arrives 2268 * from this vcc 2269 */ 2270 entry = make_entry(priv, bus_mac); 2271 if (!entry) 2272 goto out; 2273 entry->vcc = vcc; 2274 entry->old_push = old_push; 2275 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2276 memset(entry->mac_addr, 0, ETH_ALEN); 2277 entry->status = ESI_UNKNOWN; 2278 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2279 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2280 entry->timer.function = lec_arp_expire_vcc; 2281 add_timer(&entry->timer); 2282 pr_debug("After vcc was added\n"); 2283 dump_arp_table(priv); 2284 out: 2285 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2286 } 2287 2288 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2289 { 2290 unsigned long flags; 2291 struct hlist_node *node; 2292 struct lec_arp_table *entry; 2293 int i; 2294 2295 pr_debug("LEC:lec_flush_complete %lx\n", tran_id); 2296 restart: 2297 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2298 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2299 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2300 if (entry->flush_tran_id == tran_id 2301 && entry->status == ESI_FLUSH_PENDING) { 2302 struct sk_buff *skb; 2303 struct atm_vcc *vcc = entry->vcc; 2304 2305 lec_arp_hold(entry); 2306 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2307 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2308 lec_send(vcc, skb, entry->priv); 2309 entry->last_used = jiffies; 2310 entry->status = ESI_FORWARD_DIRECT; 2311 lec_arp_put(entry); 2312 pr_debug("LEC_ARP: Flushed\n"); 2313 goto restart; 2314 } 2315 } 2316 } 2317 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2318 dump_arp_table(priv); 2319 } 2320 2321 static void 2322 lec_set_flush_tran_id(struct lec_priv *priv, 2323 const unsigned char *atm_addr, unsigned long tran_id) 2324 { 2325 unsigned long flags; 2326 struct hlist_node *node; 2327 struct lec_arp_table *entry; 2328 int i; 2329 2330 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2331 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2332 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2333 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2334 entry->flush_tran_id = tran_id; 2335 pr_debug("Set flush transaction id to %lx for %p\n", 2336 tran_id, entry); 2337 } 2338 } 2339 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2340 } 2341 2342 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2343 { 2344 unsigned long flags; 2345 unsigned char mac_addr[] = { 2346 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2347 }; 2348 struct lec_arp_table *to_add; 2349 struct lec_vcc_priv *vpriv; 2350 int err = 0; 2351 2352 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2353 return -ENOMEM; 2354 vpriv->xoff = 0; 2355 vpriv->old_pop = vcc->pop; 2356 vcc->user_back = vpriv; 2357 vcc->pop = lec_pop; 2358 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2359 to_add = make_entry(priv, mac_addr); 2360 if (!to_add) { 2361 vcc->pop = vpriv->old_pop; 2362 kfree(vpriv); 2363 err = -ENOMEM; 2364 goto out; 2365 } 2366 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2367 to_add->status = ESI_FORWARD_DIRECT; 2368 to_add->flags |= LEC_PERMANENT_FLAG; 2369 to_add->vcc = vcc; 2370 to_add->old_push = vcc->push; 2371 vcc->push = lec_push; 2372 priv->mcast_vcc = vcc; 2373 lec_arp_add(priv, to_add); 2374 out: 2375 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2376 return err; 2377 } 2378 2379 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2380 { 2381 unsigned long flags; 2382 struct hlist_node *node, *next; 2383 struct lec_arp_table *entry; 2384 int i; 2385 2386 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2387 dump_arp_table(priv); 2388 2389 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2390 2391 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2392 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2393 if (vcc == entry->vcc) { 2394 lec_arp_remove(priv, entry); 2395 lec_arp_put(entry); 2396 if (priv->mcast_vcc == vcc) { 2397 priv->mcast_vcc = NULL; 2398 } 2399 } 2400 } 2401 } 2402 2403 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2404 if (entry->vcc == vcc) { 2405 lec_arp_clear_vccs(entry); 2406 del_timer(&entry->timer); 2407 hlist_del(&entry->next); 2408 lec_arp_put(entry); 2409 } 2410 } 2411 2412 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2413 if (entry->recv_vcc == vcc) { 2414 lec_arp_clear_vccs(entry); 2415 del_timer(&entry->timer); 2416 hlist_del(&entry->next); 2417 lec_arp_put(entry); 2418 } 2419 } 2420 2421 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2422 if (entry->recv_vcc == vcc) { 2423 lec_arp_clear_vccs(entry); 2424 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2425 hlist_del(&entry->next); 2426 lec_arp_put(entry); 2427 } 2428 } 2429 2430 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2431 dump_arp_table(priv); 2432 } 2433 2434 static void 2435 lec_arp_check_empties(struct lec_priv *priv, 2436 struct atm_vcc *vcc, struct sk_buff *skb) 2437 { 2438 unsigned long flags; 2439 struct hlist_node *node, *next; 2440 struct lec_arp_table *entry, *tmp; 2441 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2442 unsigned char *src; 2443 #ifdef CONFIG_TR 2444 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2445 2446 if (priv->is_trdev) 2447 src = tr_hdr->h_source; 2448 else 2449 #endif 2450 src = hdr->h_source; 2451 2452 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2453 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2454 if (vcc == entry->vcc) { 2455 del_timer(&entry->timer); 2456 memcpy(entry->mac_addr, src, ETH_ALEN); 2457 entry->status = ESI_FORWARD_DIRECT; 2458 entry->last_used = jiffies; 2459 /* We might have got an entry */ 2460 if ((tmp = lec_arp_find(priv, src))) { 2461 lec_arp_remove(priv, tmp); 2462 lec_arp_put(tmp); 2463 } 2464 hlist_del(&entry->next); 2465 lec_arp_add(priv, entry); 2466 goto out; 2467 } 2468 } 2469 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); 2470 out: 2471 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2472 } 2473 2474 MODULE_LICENSE("GPL"); 2475