1 /* 2 * lec.c: Lan Emulation driver 3 * 4 * Marko Kiiskila <mkiiskila@yahoo.com> 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/bitops.h> 9 #include <linux/capability.h> 10 11 /* We are ethernet device */ 12 #include <linux/if_ether.h> 13 #include <linux/netdevice.h> 14 #include <linux/etherdevice.h> 15 #include <net/sock.h> 16 #include <linux/skbuff.h> 17 #include <linux/ip.h> 18 #include <asm/byteorder.h> 19 #include <asm/uaccess.h> 20 #include <net/arp.h> 21 #include <net/dst.h> 22 #include <linux/proc_fs.h> 23 #include <linux/spinlock.h> 24 #include <linux/seq_file.h> 25 26 /* TokenRing if needed */ 27 #ifdef CONFIG_TR 28 #include <linux/trdevice.h> 29 #endif 30 31 /* And atm device */ 32 #include <linux/atmdev.h> 33 #include <linux/atmlec.h> 34 35 /* Proxy LEC knows about bridging */ 36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 37 #include <linux/if_bridge.h> 38 #include "../bridge/br_private.h" 39 40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; 41 #endif 42 43 /* Modular too */ 44 #include <linux/module.h> 45 #include <linux/init.h> 46 47 #include "lec.h" 48 #include "lec_arpc.h" 49 #include "resources.h" 50 51 #define DUMP_PACKETS 0 /* 52 * 0 = None, 53 * 1 = 30 first bytes 54 * 2 = Whole packet 55 */ 56 57 #define LEC_UNRES_QUE_LEN 8 /* 58 * number of tx packets to queue for a 59 * single destination while waiting for SVC 60 */ 61 62 static int lec_open(struct net_device *dev); 63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); 64 static int lec_close(struct net_device *dev); 65 static struct net_device_stats *lec_get_stats(struct net_device *dev); 66 static void lec_init(struct net_device *dev); 67 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 68 unsigned char *mac_addr); 69 static int lec_arp_remove(struct lec_priv *priv, 70 struct lec_arp_table *to_remove); 71 /* LANE2 functions */ 72 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address, 73 u8 *tlvs, u32 sizeoftlvs); 74 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 75 u8 **tlvs, u32 *sizeoftlvs); 76 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 77 u8 *tlvs, u32 sizeoftlvs); 78 79 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 80 unsigned long permanent); 81 static void lec_arp_check_empties(struct lec_priv *priv, 82 struct atm_vcc *vcc, struct sk_buff *skb); 83 static void lec_arp_destroy(struct lec_priv *priv); 84 static void lec_arp_init(struct lec_priv *priv); 85 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 86 unsigned char *mac_to_find, 87 int is_rdesc, 88 struct lec_arp_table **ret_entry); 89 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 90 unsigned char *atm_addr, unsigned long remoteflag, 91 unsigned int targetless_le_arp); 92 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); 93 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); 94 static void lec_set_flush_tran_id(struct lec_priv *priv, 95 unsigned char *atm_addr, 96 unsigned long tran_id); 97 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 98 struct atm_vcc *vcc, 99 void (*old_push) (struct atm_vcc *vcc, 100 struct sk_buff *skb)); 101 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); 102 103 /* must be done under lec_arp_lock */ 104 static inline void lec_arp_hold(struct lec_arp_table *entry) 105 { 106 atomic_inc(&entry->usage); 107 } 108 109 static inline void lec_arp_put(struct lec_arp_table *entry) 110 { 111 if (atomic_dec_and_test(&entry->usage)) 112 kfree(entry); 113 } 114 115 116 static struct lane2_ops lane2_ops = { 117 lane2_resolve, /* resolve, spec 3.1.3 */ 118 lane2_associate_req, /* associate_req, spec 3.1.4 */ 119 NULL /* associate indicator, spec 3.1.5 */ 120 }; 121 122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 123 124 /* Device structures */ 125 static struct net_device *dev_lec[MAX_LEC_ITF]; 126 127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) 129 { 130 struct ethhdr *eth; 131 char *buff; 132 struct lec_priv *priv; 133 134 /* 135 * Check if this is a BPDU. If so, ask zeppelin to send 136 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit 137 * as the Config BPDU has 138 */ 139 eth = (struct ethhdr *)skb->data; 140 buff = skb->data + skb->dev->hard_header_len; 141 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { 142 struct sock *sk; 143 struct sk_buff *skb2; 144 struct atmlec_msg *mesg; 145 146 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 147 if (skb2 == NULL) 148 return; 149 skb2->len = sizeof(struct atmlec_msg); 150 mesg = (struct atmlec_msg *)skb2->data; 151 mesg->type = l_topology_change; 152 buff += 4; 153 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ 154 155 priv = (struct lec_priv *)dev->priv; 156 atm_force_charge(priv->lecd, skb2->truesize); 157 sk = sk_atm(priv->lecd); 158 skb_queue_tail(&sk->sk_receive_queue, skb2); 159 sk->sk_data_ready(sk, skb2->len); 160 } 161 162 return; 163 } 164 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 165 166 /* 167 * Modelled after tr_type_trans 168 * All multicast and ARE or STE frames go to BUS. 169 * Non source routed frames go by destination address. 170 * Last hop source routed frames go by destination address. 171 * Not last hop source routed frames go by _next_ route descriptor. 172 * Returns pointer to destination MAC address or fills in rdesc 173 * and returns NULL. 174 */ 175 #ifdef CONFIG_TR 176 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) 177 { 178 struct trh_hdr *trh; 179 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 = (struct lec_priv *)dev->priv; 222 223 netif_start_queue(dev); 224 memset(&priv->stats, 0, sizeof(struct net_device_stats)); 225 226 return 0; 227 } 228 229 static __inline__ void 230 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) 231 { 232 ATM_SKB(skb)->vcc = vcc; 233 ATM_SKB(skb)->atm_options = vcc->atm_options; 234 235 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 236 if (vcc->send(vcc, skb) < 0) { 237 priv->stats.tx_dropped++; 238 return; 239 } 240 241 priv->stats.tx_packets++; 242 priv->stats.tx_bytes += skb->len; 243 } 244 245 static void lec_tx_timeout(struct net_device *dev) 246 { 247 printk(KERN_INFO "%s: tx timeout\n", dev->name); 248 dev->trans_start = jiffies; 249 netif_wake_queue(dev); 250 } 251 252 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev) 253 { 254 struct sk_buff *skb2; 255 struct lec_priv *priv = (struct lec_priv *)dev->priv; 256 struct lecdatahdr_8023 *lec_h; 257 struct atm_vcc *vcc; 258 struct lec_arp_table *entry; 259 unsigned char *dst; 260 int min_frame_size; 261 #ifdef CONFIG_TR 262 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ 263 #endif 264 int is_rdesc; 265 #if DUMP_PACKETS > 0 266 char buf[300]; 267 int i = 0; 268 #endif /* DUMP_PACKETS >0 */ 269 270 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 " MAC_FMT "\n", 377 lec_h->h_dest[0], lec_h->h_dest[1], 378 lec_h->h_dest[2], lec_h->h_dest[3], 379 lec_h->h_dest[4], lec_h->h_dest[5]); 380 skb_queue_tail(&entry->tx_wait, skb); 381 } else { 382 pr_debug 383 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", 384 dev->name); 385 pr_debug("MAC address " MAC_FMT "\n", 386 lec_h->h_dest[0], lec_h->h_dest[1], 387 lec_h->h_dest[2], lec_h->h_dest[3], 388 lec_h->h_dest[4], lec_h->h_dest[5]); 389 priv->stats.tx_dropped++; 390 dev_kfree_skb(skb); 391 } 392 goto out; 393 } 394 #if DUMP_PACKETS > 0 395 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); 396 #endif /* DUMP_PACKETS > 0 */ 397 398 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { 399 pr_debug("lec.c: emptying tx queue, "); 400 pr_debug("MAC address " MAC_FMT "\n", 401 lec_h->h_dest[0], lec_h->h_dest[1], 402 lec_h->h_dest[2], lec_h->h_dest[3], 403 lec_h->h_dest[4], lec_h->h_dest[5]); 404 lec_send(vcc, skb2, priv); 405 } 406 407 lec_send(vcc, skb, priv); 408 409 if (!atm_may_send(vcc, 0)) { 410 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 411 412 vpriv->xoff = 1; 413 netif_stop_queue(dev); 414 415 /* 416 * vcc->pop() might have occurred in between, making 417 * the vcc usuable again. Since xmit is serialized, 418 * this is the only situation we have to re-test. 419 */ 420 421 if (atm_may_send(vcc, 0)) 422 netif_wake_queue(dev); 423 } 424 425 out: 426 if (entry) 427 lec_arp_put(entry); 428 dev->trans_start = jiffies; 429 return 0; 430 } 431 432 /* The inverse routine to net_open(). */ 433 static int lec_close(struct net_device *dev) 434 { 435 netif_stop_queue(dev); 436 return 0; 437 } 438 439 /* 440 * Get the current statistics. 441 * This may be called with the card open or closed. 442 */ 443 static struct net_device_stats *lec_get_stats(struct net_device *dev) 444 { 445 return &((struct lec_priv *)dev->priv)->stats; 446 } 447 448 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) 449 { 450 unsigned long flags; 451 struct net_device *dev = (struct net_device *)vcc->proto_data; 452 struct lec_priv *priv = (struct lec_priv *)dev->priv; 453 struct atmlec_msg *mesg; 454 struct lec_arp_table *entry; 455 int i; 456 char *tmp; /* FIXME */ 457 458 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 459 mesg = (struct atmlec_msg *)skb->data; 460 tmp = skb->data; 461 tmp += sizeof(struct atmlec_msg); 462 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); 463 switch (mesg->type) { 464 case l_set_mac_addr: 465 for (i = 0; i < 6; i++) { 466 dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; 467 } 468 break; 469 case l_del_mac_addr: 470 for (i = 0; i < 6; i++) { 471 dev->dev_addr[i] = 0; 472 } 473 break; 474 case l_addr_delete: 475 lec_addr_delete(priv, mesg->content.normal.atm_addr, 476 mesg->content.normal.flag); 477 break; 478 case l_topology_change: 479 priv->topology_change = mesg->content.normal.flag; 480 break; 481 case l_flush_complete: 482 lec_flush_complete(priv, mesg->content.normal.flag); 483 break; 484 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ 485 spin_lock_irqsave(&priv->lec_arp_lock, flags); 486 entry = lec_arp_find(priv, mesg->content.normal.mac_addr); 487 lec_arp_remove(priv, entry); 488 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 489 490 if (mesg->content.normal.no_source_le_narp) 491 break; 492 /* FALL THROUGH */ 493 case l_arp_update: 494 lec_arp_update(priv, mesg->content.normal.mac_addr, 495 mesg->content.normal.atm_addr, 496 mesg->content.normal.flag, 497 mesg->content.normal.targetless_le_arp); 498 pr_debug("lec: in l_arp_update\n"); 499 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ 500 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n", 501 mesg->sizeoftlvs); 502 lane2_associate_ind(dev, mesg->content.normal.mac_addr, 503 tmp, mesg->sizeoftlvs); 504 } 505 break; 506 case l_config: 507 priv->maximum_unknown_frame_count = 508 mesg->content.config.maximum_unknown_frame_count; 509 priv->max_unknown_frame_time = 510 (mesg->content.config.max_unknown_frame_time * HZ); 511 priv->max_retry_count = mesg->content.config.max_retry_count; 512 priv->aging_time = (mesg->content.config.aging_time * HZ); 513 priv->forward_delay_time = 514 (mesg->content.config.forward_delay_time * HZ); 515 priv->arp_response_time = 516 (mesg->content.config.arp_response_time * HZ); 517 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); 518 priv->path_switching_delay = 519 (mesg->content.config.path_switching_delay * HZ); 520 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ 521 priv->lane2_ops = NULL; 522 if (priv->lane_version > 1) 523 priv->lane2_ops = &lane2_ops; 524 if (dev->change_mtu(dev, mesg->content.config.mtu)) 525 printk("%s: change_mtu to %d failed\n", dev->name, 526 mesg->content.config.mtu); 527 priv->is_proxy = mesg->content.config.is_proxy; 528 break; 529 case l_flush_tran_id: 530 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, 531 mesg->content.normal.flag); 532 break; 533 case l_set_lecid: 534 priv->lecid = 535 (unsigned short)(0xffff & mesg->content.normal.flag); 536 break; 537 case l_should_bridge: 538 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 539 { 540 struct net_bridge_fdb_entry *f; 541 542 pr_debug 543 ("%s: bridge zeppelin asks about " MAC_FMT "\n", 544 dev->name, 545 mesg->content.proxy.mac_addr[0], 546 mesg->content.proxy.mac_addr[1], 547 mesg->content.proxy.mac_addr[2], 548 mesg->content.proxy.mac_addr[3], 549 mesg->content.proxy.mac_addr[4], 550 mesg->content.proxy.mac_addr[5]); 551 552 if (br_fdb_get_hook == NULL || dev->br_port == NULL) 553 break; 554 555 f = br_fdb_get_hook(dev->br_port->br, 556 mesg->content.proxy.mac_addr); 557 if (f != NULL && f->dst->dev != dev 558 && f->dst->state == BR_STATE_FORWARDING) { 559 /* hit from bridge table, send LE_ARP_RESPONSE */ 560 struct sk_buff *skb2; 561 struct sock *sk; 562 563 pr_debug 564 ("%s: entry found, responding to zeppelin\n", 565 dev->name); 566 skb2 = 567 alloc_skb(sizeof(struct atmlec_msg), 568 GFP_ATOMIC); 569 if (skb2 == NULL) { 570 br_fdb_put_hook(f); 571 break; 572 } 573 skb2->len = sizeof(struct atmlec_msg); 574 skb_copy_to_linear_data(skb2, mesg, 575 sizeof(*mesg)); 576 atm_force_charge(priv->lecd, skb2->truesize); 577 sk = sk_atm(priv->lecd); 578 skb_queue_tail(&sk->sk_receive_queue, skb2); 579 sk->sk_data_ready(sk, skb2->len); 580 } 581 if (f != NULL) 582 br_fdb_put_hook(f); 583 } 584 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 585 break; 586 default: 587 printk("%s: Unknown message type %d\n", dev->name, mesg->type); 588 dev_kfree_skb(skb); 589 return -EINVAL; 590 } 591 dev_kfree_skb(skb); 592 return 0; 593 } 594 595 static void lec_atm_close(struct atm_vcc *vcc) 596 { 597 struct sk_buff *skb; 598 struct net_device *dev = (struct net_device *)vcc->proto_data; 599 struct lec_priv *priv = (struct lec_priv *)dev->priv; 600 601 priv->lecd = NULL; 602 /* Do something needful? */ 603 604 netif_stop_queue(dev); 605 lec_arp_destroy(priv); 606 607 if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) 608 printk("%s lec_atm_close: closing with messages pending\n", 609 dev->name); 610 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { 611 atm_return(vcc, skb->truesize); 612 dev_kfree_skb(skb); 613 } 614 615 printk("%s: Shut down!\n", dev->name); 616 module_put(THIS_MODULE); 617 } 618 619 static struct atmdev_ops lecdev_ops = { 620 .close = lec_atm_close, 621 .send = lec_atm_send 622 }; 623 624 static struct atm_dev lecatm_dev = { 625 .ops = &lecdev_ops, 626 .type = "lec", 627 .number = 999, /* dummy device number */ 628 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) 629 }; 630 631 /* 632 * LANE2: new argument struct sk_buff *data contains 633 * the LE_ARP based TLVs introduced in the LANE2 spec 634 */ 635 static int 636 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, 637 unsigned char *mac_addr, unsigned char *atm_addr, 638 struct sk_buff *data) 639 { 640 struct sock *sk; 641 struct sk_buff *skb; 642 struct atmlec_msg *mesg; 643 644 if (!priv || !priv->lecd) { 645 return -1; 646 } 647 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 648 if (!skb) 649 return -1; 650 skb->len = sizeof(struct atmlec_msg); 651 mesg = (struct atmlec_msg *)skb->data; 652 memset(mesg, 0, sizeof(struct atmlec_msg)); 653 mesg->type = type; 654 if (data != NULL) 655 mesg->sizeoftlvs = data->len; 656 if (mac_addr) 657 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); 658 else 659 mesg->content.normal.targetless_le_arp = 1; 660 if (atm_addr) 661 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); 662 663 atm_force_charge(priv->lecd, skb->truesize); 664 sk = sk_atm(priv->lecd); 665 skb_queue_tail(&sk->sk_receive_queue, skb); 666 sk->sk_data_ready(sk, skb->len); 667 668 if (data != NULL) { 669 pr_debug("lec: about to send %d bytes of data\n", data->len); 670 atm_force_charge(priv->lecd, data->truesize); 671 skb_queue_tail(&sk->sk_receive_queue, data); 672 sk->sk_data_ready(sk, skb->len); 673 } 674 675 return 0; 676 } 677 678 /* shamelessly stolen from drivers/net/net_init.c */ 679 static int lec_change_mtu(struct net_device *dev, int new_mtu) 680 { 681 if ((new_mtu < 68) || (new_mtu > 18190)) 682 return -EINVAL; 683 dev->mtu = new_mtu; 684 return 0; 685 } 686 687 static void lec_set_multicast_list(struct net_device *dev) 688 { 689 /* 690 * by default, all multicast frames arrive over the bus. 691 * eventually support selective multicast service 692 */ 693 return; 694 } 695 696 static void lec_init(struct net_device *dev) 697 { 698 dev->change_mtu = lec_change_mtu; 699 dev->open = lec_open; 700 dev->stop = lec_close; 701 dev->hard_start_xmit = lec_start_xmit; 702 dev->tx_timeout = lec_tx_timeout; 703 704 dev->get_stats = lec_get_stats; 705 dev->set_multicast_list = lec_set_multicast_list; 706 dev->do_ioctl = NULL; 707 printk("%s: Initialized!\n", dev->name); 708 return; 709 } 710 711 static unsigned char lec_ctrl_magic[] = { 712 0xff, 713 0x00, 714 0x01, 715 0x01 716 }; 717 718 #define LEC_DATA_DIRECT_8023 2 719 #define LEC_DATA_DIRECT_8025 3 720 721 static int lec_is_data_direct(struct atm_vcc *vcc) 722 { 723 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || 724 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); 725 } 726 727 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 728 { 729 unsigned long flags; 730 struct net_device *dev = (struct net_device *)vcc->proto_data; 731 struct lec_priv *priv = (struct lec_priv *)dev->priv; 732 733 #if DUMP_PACKETS >0 734 int i = 0; 735 char buf[300]; 736 737 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, 738 vcc->vpi, vcc->vci); 739 #endif 740 if (!skb) { 741 pr_debug("%s: null skb\n", dev->name); 742 lec_vcc_close(priv, vcc); 743 return; 744 } 745 #if DUMP_PACKETS > 0 746 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, 747 skb->len, priv->lecid); 748 #if DUMP_PACKETS >= 2 749 for (i = 0; i < skb->len && i < 99; i++) { 750 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 751 } 752 #elif DUMP_PACKETS >= 1 753 for (i = 0; i < skb->len && i < 30; i++) { 754 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 755 } 756 #endif /* DUMP_PACKETS >= 1 */ 757 if (i == skb->len) 758 printk("%s\n", buf); 759 else 760 printk("%s...\n", buf); 761 #endif /* DUMP_PACKETS > 0 */ 762 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ 763 struct sock *sk = sk_atm(vcc); 764 765 pr_debug("%s: To daemon\n", dev->name); 766 skb_queue_tail(&sk->sk_receive_queue, skb); 767 sk->sk_data_ready(sk, skb->len); 768 } else { /* Data frame, queue to protocol handlers */ 769 struct lec_arp_table *entry; 770 unsigned char *src, *dst; 771 772 atm_return(vcc, skb->truesize); 773 if (*(__be16 *) skb->data == htons(priv->lecid) || 774 !priv->lecd || !(dev->flags & IFF_UP)) { 775 /* 776 * Probably looping back, or if lecd is missing, 777 * lecd has gone down 778 */ 779 pr_debug("Ignoring frame...\n"); 780 dev_kfree_skb(skb); 781 return; 782 } 783 #ifdef CONFIG_TR 784 if (priv->is_trdev) 785 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; 786 else 787 #endif 788 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; 789 790 /* 791 * If this is a Data Direct VCC, and the VCC does not match 792 * the LE_ARP cache entry, delete the LE_ARP cache entry. 793 */ 794 spin_lock_irqsave(&priv->lec_arp_lock, flags); 795 if (lec_is_data_direct(vcc)) { 796 #ifdef CONFIG_TR 797 if (priv->is_trdev) 798 src = 799 ((struct lecdatahdr_8025 *)skb->data)-> 800 h_source; 801 else 802 #endif 803 src = 804 ((struct lecdatahdr_8023 *)skb->data)-> 805 h_source; 806 entry = lec_arp_find(priv, src); 807 if (entry && entry->vcc != vcc) { 808 lec_arp_remove(priv, entry); 809 lec_arp_put(entry); 810 } 811 } 812 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 813 814 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ 815 !priv->is_proxy && /* Proxy wants all the packets */ 816 memcmp(dst, dev->dev_addr, dev->addr_len)) { 817 dev_kfree_skb(skb); 818 return; 819 } 820 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 821 lec_arp_check_empties(priv, vcc, skb); 822 } 823 skb_pull(skb, 2); /* skip lec_id */ 824 #ifdef CONFIG_TR 825 if (priv->is_trdev) 826 skb->protocol = tr_type_trans(skb, dev); 827 else 828 #endif 829 skb->protocol = eth_type_trans(skb, dev); 830 priv->stats.rx_packets++; 831 priv->stats.rx_bytes += skb->len; 832 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 833 netif_rx(skb); 834 } 835 } 836 837 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 838 { 839 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 840 struct net_device *dev = skb->dev; 841 842 if (vpriv == NULL) { 843 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 844 return; 845 } 846 847 vpriv->old_pop(vcc, skb); 848 849 if (vpriv->xoff && atm_may_send(vcc, 0)) { 850 vpriv->xoff = 0; 851 if (netif_running(dev) && netif_queue_stopped(dev)) 852 netif_wake_queue(dev); 853 } 854 } 855 856 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 857 { 858 struct lec_vcc_priv *vpriv; 859 int bytes_left; 860 struct atmlec_ioc ioc_data; 861 862 /* Lecd must be up in this case */ 863 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 864 if (bytes_left != 0) { 865 printk 866 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 867 bytes_left); 868 } 869 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 870 !dev_lec[ioc_data.dev_num]) 871 return -EINVAL; 872 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 873 return -ENOMEM; 874 vpriv->xoff = 0; 875 vpriv->old_pop = vcc->pop; 876 vcc->user_back = vpriv; 877 vcc->pop = lec_pop; 878 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, 879 &ioc_data, vcc, vcc->push); 880 vcc->proto_data = dev_lec[ioc_data.dev_num]; 881 vcc->push = lec_push; 882 return 0; 883 } 884 885 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 886 { 887 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 888 return -EINVAL; 889 vcc->proto_data = dev_lec[arg]; 890 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); 891 } 892 893 /* Initialize device. */ 894 static int lecd_attach(struct atm_vcc *vcc, int arg) 895 { 896 int i; 897 struct lec_priv *priv; 898 899 if (arg < 0) 900 i = 0; 901 else 902 i = arg; 903 #ifdef CONFIG_TR 904 if (arg >= MAX_LEC_ITF) 905 return -EINVAL; 906 #else /* Reserve the top NUM_TR_DEVS for TR */ 907 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 908 return -EINVAL; 909 #endif 910 if (!dev_lec[i]) { 911 int is_trdev, size; 912 913 is_trdev = 0; 914 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 915 is_trdev = 1; 916 917 size = sizeof(struct lec_priv); 918 #ifdef CONFIG_TR 919 if (is_trdev) 920 dev_lec[i] = alloc_trdev(size); 921 else 922 #endif 923 dev_lec[i] = alloc_etherdev(size); 924 if (!dev_lec[i]) 925 return -ENOMEM; 926 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 927 if (register_netdev(dev_lec[i])) { 928 free_netdev(dev_lec[i]); 929 return -EINVAL; 930 } 931 932 priv = dev_lec[i]->priv; 933 priv->is_trdev = is_trdev; 934 lec_init(dev_lec[i]); 935 } else { 936 priv = dev_lec[i]->priv; 937 if (priv->lecd) 938 return -EADDRINUSE; 939 } 940 lec_arp_init(priv); 941 priv->itfnum = i; /* LANE2 addition */ 942 priv->lecd = vcc; 943 vcc->dev = &lecatm_dev; 944 vcc_insert_socket(sk_atm(vcc)); 945 946 vcc->proto_data = dev_lec[i]; 947 set_bit(ATM_VF_META, &vcc->flags); 948 set_bit(ATM_VF_READY, &vcc->flags); 949 950 /* Set default values to these variables */ 951 priv->maximum_unknown_frame_count = 1; 952 priv->max_unknown_frame_time = (1 * HZ); 953 priv->vcc_timeout_period = (1200 * HZ); 954 priv->max_retry_count = 1; 955 priv->aging_time = (300 * HZ); 956 priv->forward_delay_time = (15 * HZ); 957 priv->topology_change = 0; 958 priv->arp_response_time = (1 * HZ); 959 priv->flush_timeout = (4 * HZ); 960 priv->path_switching_delay = (6 * HZ); 961 962 if (dev_lec[i]->flags & IFF_UP) { 963 netif_start_queue(dev_lec[i]); 964 } 965 __module_get(THIS_MODULE); 966 return i; 967 } 968 969 #ifdef CONFIG_PROC_FS 970 static char *lec_arp_get_status_string(unsigned char status) 971 { 972 static char *lec_arp_status_string[] = { 973 "ESI_UNKNOWN ", 974 "ESI_ARP_PENDING ", 975 "ESI_VC_PENDING ", 976 "<Undefined> ", 977 "ESI_FLUSH_PENDING ", 978 "ESI_FORWARD_DIRECT" 979 }; 980 981 if (status > ESI_FORWARD_DIRECT) 982 status = 3; /* ESI_UNDEFINED */ 983 return lec_arp_status_string[status]; 984 } 985 986 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 987 { 988 int i; 989 990 for (i = 0; i < ETH_ALEN; i++) 991 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 992 seq_printf(seq, " "); 993 for (i = 0; i < ATM_ESA_LEN; i++) 994 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 995 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 996 entry->flags & 0xffff); 997 if (entry->vcc) 998 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 999 else 1000 seq_printf(seq, " "); 1001 if (entry->recv_vcc) { 1002 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 1003 entry->recv_vcc->vci); 1004 } 1005 seq_putc(seq, '\n'); 1006 } 1007 1008 struct lec_state { 1009 unsigned long flags; 1010 struct lec_priv *locked; 1011 struct hlist_node *node; 1012 struct net_device *dev; 1013 int itf; 1014 int arp_table; 1015 int misc_table; 1016 }; 1017 1018 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1019 loff_t *l) 1020 { 1021 struct hlist_node *e = state->node; 1022 struct lec_arp_table *tmp; 1023 1024 if (!e) 1025 e = tbl->first; 1026 if (e == SEQ_START_TOKEN) { 1027 e = tbl->first; 1028 --*l; 1029 } 1030 1031 hlist_for_each_entry_from(tmp, e, next) { 1032 if (--*l < 0) 1033 break; 1034 } 1035 state->node = e; 1036 1037 return (*l < 0) ? state : NULL; 1038 } 1039 1040 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1041 struct lec_priv *priv) 1042 { 1043 void *v = NULL; 1044 int p; 1045 1046 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1047 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1048 if (v) 1049 break; 1050 } 1051 state->arp_table = p; 1052 return v; 1053 } 1054 1055 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1056 struct lec_priv *priv) 1057 { 1058 struct hlist_head *lec_misc_tables[] = { 1059 &priv->lec_arp_empty_ones, 1060 &priv->lec_no_forward, 1061 &priv->mcast_fwds 1062 }; 1063 void *v = NULL; 1064 int q; 1065 1066 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1067 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1068 if (v) 1069 break; 1070 } 1071 state->misc_table = q; 1072 return v; 1073 } 1074 1075 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1076 struct lec_priv *priv) 1077 { 1078 if (!state->locked) { 1079 state->locked = priv; 1080 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1081 } 1082 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1083 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1084 state->locked = NULL; 1085 /* Partial state reset for the next time we get called */ 1086 state->arp_table = state->misc_table = 0; 1087 } 1088 return state->locked; 1089 } 1090 1091 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1092 { 1093 struct net_device *dev; 1094 void *v; 1095 1096 dev = state->dev ? state->dev : dev_lec[state->itf]; 1097 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; 1098 if (!v && dev) { 1099 dev_put(dev); 1100 /* Partial state reset for the next time we get called */ 1101 dev = NULL; 1102 } 1103 state->dev = dev; 1104 return v; 1105 } 1106 1107 static void *lec_get_idx(struct lec_state *state, loff_t l) 1108 { 1109 void *v = NULL; 1110 1111 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1112 v = lec_itf_walk(state, &l); 1113 if (v) 1114 break; 1115 } 1116 return v; 1117 } 1118 1119 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1120 { 1121 struct lec_state *state = seq->private; 1122 1123 state->itf = 0; 1124 state->dev = NULL; 1125 state->locked = NULL; 1126 state->arp_table = 0; 1127 state->misc_table = 0; 1128 state->node = SEQ_START_TOKEN; 1129 1130 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; 1131 } 1132 1133 static void lec_seq_stop(struct seq_file *seq, void *v) 1134 { 1135 struct lec_state *state = seq->private; 1136 1137 if (state->dev) { 1138 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1139 state->flags); 1140 dev_put(state->dev); 1141 } 1142 } 1143 1144 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1145 { 1146 struct lec_state *state = seq->private; 1147 1148 v = lec_get_idx(state, 1); 1149 *pos += !!PTR_ERR(v); 1150 return v; 1151 } 1152 1153 static int lec_seq_show(struct seq_file *seq, void *v) 1154 { 1155 static char lec_banner[] = "Itf MAC ATM destination" 1156 " Status Flags " 1157 "VPI/VCI Recv VPI/VCI\n"; 1158 1159 if (v == SEQ_START_TOKEN) 1160 seq_puts(seq, lec_banner); 1161 else { 1162 struct lec_state *state = seq->private; 1163 struct net_device *dev = state->dev; 1164 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1165 1166 seq_printf(seq, "%s ", dev->name); 1167 lec_info(seq, entry); 1168 } 1169 return 0; 1170 } 1171 1172 static const struct seq_operations lec_seq_ops = { 1173 .start = lec_seq_start, 1174 .next = lec_seq_next, 1175 .stop = lec_seq_stop, 1176 .show = lec_seq_show, 1177 }; 1178 1179 static int lec_seq_open(struct inode *inode, struct file *file) 1180 { 1181 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); 1182 } 1183 1184 static const struct file_operations lec_seq_fops = { 1185 .owner = THIS_MODULE, 1186 .open = lec_seq_open, 1187 .read = seq_read, 1188 .llseek = seq_lseek, 1189 .release = seq_release_private, 1190 }; 1191 #endif 1192 1193 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1194 { 1195 struct atm_vcc *vcc = ATM_SD(sock); 1196 int err = 0; 1197 1198 switch (cmd) { 1199 case ATMLEC_CTRL: 1200 case ATMLEC_MCAST: 1201 case ATMLEC_DATA: 1202 if (!capable(CAP_NET_ADMIN)) 1203 return -EPERM; 1204 break; 1205 default: 1206 return -ENOIOCTLCMD; 1207 } 1208 1209 switch (cmd) { 1210 case ATMLEC_CTRL: 1211 err = lecd_attach(vcc, (int)arg); 1212 if (err >= 0) 1213 sock->state = SS_CONNECTED; 1214 break; 1215 case ATMLEC_MCAST: 1216 err = lec_mcast_attach(vcc, (int)arg); 1217 break; 1218 case ATMLEC_DATA: 1219 err = lec_vcc_attach(vcc, (void __user *)arg); 1220 break; 1221 } 1222 1223 return err; 1224 } 1225 1226 static struct atm_ioctl lane_ioctl_ops = { 1227 .owner = THIS_MODULE, 1228 .ioctl = lane_ioctl, 1229 }; 1230 1231 static int __init lane_module_init(void) 1232 { 1233 #ifdef CONFIG_PROC_FS 1234 struct proc_dir_entry *p; 1235 1236 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); 1237 if (!p) { 1238 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n"); 1239 return -ENOMEM; 1240 } 1241 #endif 1242 1243 register_atm_ioctl(&lane_ioctl_ops); 1244 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1245 return 0; 1246 } 1247 1248 static void __exit lane_module_cleanup(void) 1249 { 1250 int i; 1251 struct lec_priv *priv; 1252 1253 remove_proc_entry("lec", atm_proc_root); 1254 1255 deregister_atm_ioctl(&lane_ioctl_ops); 1256 1257 for (i = 0; i < MAX_LEC_ITF; i++) { 1258 if (dev_lec[i] != NULL) { 1259 priv = (struct lec_priv *)dev_lec[i]->priv; 1260 unregister_netdev(dev_lec[i]); 1261 free_netdev(dev_lec[i]); 1262 dev_lec[i] = NULL; 1263 } 1264 } 1265 1266 return; 1267 } 1268 1269 module_init(lane_module_init); 1270 module_exit(lane_module_cleanup); 1271 1272 /* 1273 * LANE2: 3.1.3, LE_RESOLVE.request 1274 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1275 * If sizeoftlvs == NULL the default TLVs associated with with this 1276 * lec will be used. 1277 * If dst_mac == NULL, targetless LE_ARP will be sent 1278 */ 1279 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 1280 u8 **tlvs, u32 *sizeoftlvs) 1281 { 1282 unsigned long flags; 1283 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1284 struct lec_arp_table *table; 1285 struct sk_buff *skb; 1286 int retval; 1287 1288 if (force == 0) { 1289 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1290 table = lec_arp_find(priv, dst_mac); 1291 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1292 if (table == NULL) 1293 return -1; 1294 1295 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1296 if (*tlvs == NULL) 1297 return -1; 1298 1299 *sizeoftlvs = table->sizeoftlvs; 1300 1301 return 0; 1302 } 1303 1304 if (sizeoftlvs == NULL) 1305 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1306 1307 else { 1308 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1309 if (skb == NULL) 1310 return -1; 1311 skb->len = *sizeoftlvs; 1312 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); 1313 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1314 } 1315 return retval; 1316 } 1317 1318 /* 1319 * LANE2: 3.1.4, LE_ASSOCIATE.request 1320 * Associate the *tlvs with the *lan_dst address. 1321 * Will overwrite any previous association 1322 * Returns 1 for success, 0 for failure (out of memory) 1323 * 1324 */ 1325 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 1326 u8 *tlvs, u32 sizeoftlvs) 1327 { 1328 int retval; 1329 struct sk_buff *skb; 1330 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1331 1332 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1333 return (0); /* not our mac address */ 1334 1335 kfree(priv->tlvs); /* NULL if there was no previous association */ 1336 1337 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1338 if (priv->tlvs == NULL) 1339 return (0); 1340 priv->sizeoftlvs = sizeoftlvs; 1341 1342 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1343 if (skb == NULL) 1344 return 0; 1345 skb->len = sizeoftlvs; 1346 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); 1347 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1348 if (retval != 0) 1349 printk("lec.c: lane2_associate_req() failed\n"); 1350 /* 1351 * If the previous association has changed we must 1352 * somehow notify other LANE entities about the change 1353 */ 1354 return (1); 1355 } 1356 1357 /* 1358 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1359 * 1360 */ 1361 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr, 1362 u8 *tlvs, u32 sizeoftlvs) 1363 { 1364 #if 0 1365 int i = 0; 1366 #endif 1367 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1368 #if 0 /* 1369 * Why have the TLVs in LE_ARP entries 1370 * since we do not use them? When you 1371 * uncomment this code, make sure the 1372 * TLVs get freed when entry is killed 1373 */ 1374 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1375 1376 if (entry == NULL) 1377 return; /* should not happen */ 1378 1379 kfree(entry->tlvs); 1380 1381 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1382 if (entry->tlvs == NULL) 1383 return; 1384 entry->sizeoftlvs = sizeoftlvs; 1385 #endif 1386 #if 0 1387 printk("lec.c: lane2_associate_ind()\n"); 1388 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1389 while (i < sizeoftlvs) 1390 printk("%02x ", tlvs[i++]); 1391 1392 printk("\n"); 1393 #endif 1394 1395 /* tell MPOA about the TLVs we saw */ 1396 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1397 priv->lane2_ops->associate_indicator(dev, mac_addr, 1398 tlvs, sizeoftlvs); 1399 } 1400 return; 1401 } 1402 1403 /* 1404 * Here starts what used to lec_arpc.c 1405 * 1406 * lec_arpc.c was added here when making 1407 * lane client modular. October 1997 1408 */ 1409 1410 #include <linux/types.h> 1411 #include <linux/timer.h> 1412 #include <asm/param.h> 1413 #include <asm/atomic.h> 1414 #include <linux/inetdevice.h> 1415 #include <net/route.h> 1416 1417 #if 0 1418 #define pr_debug(format,args...) 1419 /* 1420 #define pr_debug printk 1421 */ 1422 #endif 1423 #define DEBUG_ARP_TABLE 0 1424 1425 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1426 1427 static void lec_arp_check_expire(struct work_struct *work); 1428 static void lec_arp_expire_arp(unsigned long data); 1429 1430 /* 1431 * Arp table funcs 1432 */ 1433 1434 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1435 1436 /* 1437 * Initialization of arp-cache 1438 */ 1439 static void lec_arp_init(struct lec_priv *priv) 1440 { 1441 unsigned short i; 1442 1443 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1444 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1445 } 1446 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1447 INIT_HLIST_HEAD(&priv->lec_no_forward); 1448 INIT_HLIST_HEAD(&priv->mcast_fwds); 1449 spin_lock_init(&priv->lec_arp_lock); 1450 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1451 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1452 } 1453 1454 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1455 { 1456 if (entry->vcc) { 1457 struct atm_vcc *vcc = entry->vcc; 1458 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1459 struct net_device *dev = (struct net_device *)vcc->proto_data; 1460 1461 vcc->pop = vpriv->old_pop; 1462 if (vpriv->xoff) 1463 netif_wake_queue(dev); 1464 kfree(vpriv); 1465 vcc->user_back = NULL; 1466 vcc->push = entry->old_push; 1467 vcc_release_async(vcc, -EPIPE); 1468 entry->vcc = NULL; 1469 } 1470 if (entry->recv_vcc) { 1471 entry->recv_vcc->push = entry->old_recv_push; 1472 vcc_release_async(entry->recv_vcc, -EPIPE); 1473 entry->recv_vcc = NULL; 1474 } 1475 } 1476 1477 /* 1478 * Insert entry to lec_arp_table 1479 * LANE2: Add to the end of the list to satisfy 8.1.13 1480 */ 1481 static inline void 1482 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1483 { 1484 struct hlist_head *tmp; 1485 1486 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1487 hlist_add_head(&entry->next, tmp); 1488 1489 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1490 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1491 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1492 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1493 } 1494 1495 /* 1496 * Remove entry from lec_arp_table 1497 */ 1498 static int 1499 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1500 { 1501 struct hlist_node *node; 1502 struct lec_arp_table *entry; 1503 int i, remove_vcc = 1; 1504 1505 if (!to_remove) { 1506 return -1; 1507 } 1508 1509 hlist_del(&to_remove->next); 1510 del_timer(&to_remove->timer); 1511 1512 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1513 if (to_remove->status >= ESI_FLUSH_PENDING) { 1514 /* 1515 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1516 */ 1517 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1518 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1519 if (memcmp(to_remove->atm_addr, 1520 entry->atm_addr, ATM_ESA_LEN) == 0) { 1521 remove_vcc = 0; 1522 break; 1523 } 1524 } 1525 } 1526 if (remove_vcc) 1527 lec_arp_clear_vccs(to_remove); 1528 } 1529 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1530 1531 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1532 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1533 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1534 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1535 return 0; 1536 } 1537 1538 #if DEBUG_ARP_TABLE 1539 static char *get_status_string(unsigned char st) 1540 { 1541 switch (st) { 1542 case ESI_UNKNOWN: 1543 return "ESI_UNKNOWN"; 1544 case ESI_ARP_PENDING: 1545 return "ESI_ARP_PENDING"; 1546 case ESI_VC_PENDING: 1547 return "ESI_VC_PENDING"; 1548 case ESI_FLUSH_PENDING: 1549 return "ESI_FLUSH_PENDING"; 1550 case ESI_FORWARD_DIRECT: 1551 return "ESI_FORWARD_DIRECT"; 1552 default: 1553 return "<UNKNOWN>"; 1554 } 1555 } 1556 1557 static void dump_arp_table(struct lec_priv *priv) 1558 { 1559 struct hlist_node *node; 1560 struct lec_arp_table *rulla; 1561 char buf[256]; 1562 int i, j, offset; 1563 1564 printk("Dump %p:\n", priv); 1565 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1566 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1567 offset = 0; 1568 offset += sprintf(buf, "%d: %p\n", i, rulla); 1569 offset += sprintf(buf + offset, "Mac:"); 1570 for (j = 0; j < ETH_ALEN; j++) { 1571 offset += sprintf(buf + offset, 1572 "%2.2x ", 1573 rulla->mac_addr[j] & 0xff); 1574 } 1575 offset += sprintf(buf + offset, "Atm:"); 1576 for (j = 0; j < ATM_ESA_LEN; j++) { 1577 offset += sprintf(buf + offset, 1578 "%2.2x ", 1579 rulla->atm_addr[j] & 0xff); 1580 } 1581 offset += sprintf(buf + offset, 1582 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1583 rulla->vcc ? rulla->vcc->vpi : 0, 1584 rulla->vcc ? rulla->vcc->vci : 0, 1585 rulla->recv_vcc ? rulla->recv_vcc-> 1586 vpi : 0, 1587 rulla->recv_vcc ? rulla->recv_vcc-> 1588 vci : 0, rulla->last_used, 1589 rulla->timestamp, rulla->no_tries); 1590 offset += 1591 sprintf(buf + offset, 1592 "Flags:%x, Packets_flooded:%x, Status: %s ", 1593 rulla->flags, rulla->packets_flooded, 1594 get_status_string(rulla->status)); 1595 printk("%s\n", buf); 1596 } 1597 } 1598 1599 if (!hlist_empty(&priv->lec_no_forward)) 1600 printk("No forward\n"); 1601 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1602 offset = 0; 1603 offset += sprintf(buf + offset, "Mac:"); 1604 for (j = 0; j < ETH_ALEN; j++) { 1605 offset += sprintf(buf + offset, "%2.2x ", 1606 rulla->mac_addr[j] & 0xff); 1607 } 1608 offset += sprintf(buf + offset, "Atm:"); 1609 for (j = 0; j < ATM_ESA_LEN; j++) { 1610 offset += sprintf(buf + offset, "%2.2x ", 1611 rulla->atm_addr[j] & 0xff); 1612 } 1613 offset += sprintf(buf + offset, 1614 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1615 rulla->vcc ? rulla->vcc->vpi : 0, 1616 rulla->vcc ? rulla->vcc->vci : 0, 1617 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1618 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1619 rulla->last_used, 1620 rulla->timestamp, rulla->no_tries); 1621 offset += sprintf(buf + offset, 1622 "Flags:%x, Packets_flooded:%x, Status: %s ", 1623 rulla->flags, rulla->packets_flooded, 1624 get_status_string(rulla->status)); 1625 printk("%s\n", buf); 1626 } 1627 1628 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1629 printk("Empty ones\n"); 1630 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { 1631 offset = 0; 1632 offset += sprintf(buf + offset, "Mac:"); 1633 for (j = 0; j < ETH_ALEN; j++) { 1634 offset += sprintf(buf + offset, "%2.2x ", 1635 rulla->mac_addr[j] & 0xff); 1636 } 1637 offset += sprintf(buf + offset, "Atm:"); 1638 for (j = 0; j < ATM_ESA_LEN; j++) { 1639 offset += sprintf(buf + offset, "%2.2x ", 1640 rulla->atm_addr[j] & 0xff); 1641 } 1642 offset += sprintf(buf + offset, 1643 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1644 rulla->vcc ? rulla->vcc->vpi : 0, 1645 rulla->vcc ? rulla->vcc->vci : 0, 1646 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1647 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1648 rulla->last_used, 1649 rulla->timestamp, rulla->no_tries); 1650 offset += sprintf(buf + offset, 1651 "Flags:%x, Packets_flooded:%x, Status: %s ", 1652 rulla->flags, rulla->packets_flooded, 1653 get_status_string(rulla->status)); 1654 printk("%s", buf); 1655 } 1656 1657 if (!hlist_empty(&priv->mcast_fwds)) 1658 printk("Multicast Forward VCCs\n"); 1659 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { 1660 offset = 0; 1661 offset += sprintf(buf + offset, "Mac:"); 1662 for (j = 0; j < ETH_ALEN; j++) { 1663 offset += sprintf(buf + offset, "%2.2x ", 1664 rulla->mac_addr[j] & 0xff); 1665 } 1666 offset += sprintf(buf + offset, "Atm:"); 1667 for (j = 0; j < ATM_ESA_LEN; j++) { 1668 offset += sprintf(buf + offset, "%2.2x ", 1669 rulla->atm_addr[j] & 0xff); 1670 } 1671 offset += sprintf(buf + offset, 1672 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1673 rulla->vcc ? rulla->vcc->vpi : 0, 1674 rulla->vcc ? rulla->vcc->vci : 0, 1675 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1676 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1677 rulla->last_used, 1678 rulla->timestamp, rulla->no_tries); 1679 offset += sprintf(buf + offset, 1680 "Flags:%x, Packets_flooded:%x, Status: %s ", 1681 rulla->flags, rulla->packets_flooded, 1682 get_status_string(rulla->status)); 1683 printk("%s\n", buf); 1684 } 1685 1686 } 1687 #else 1688 #define dump_arp_table(priv) do { } while (0) 1689 #endif 1690 1691 /* 1692 * Destruction of arp-cache 1693 */ 1694 static void lec_arp_destroy(struct lec_priv *priv) 1695 { 1696 unsigned long flags; 1697 struct hlist_node *node, *next; 1698 struct lec_arp_table *entry; 1699 int i; 1700 1701 cancel_rearming_delayed_work(&priv->lec_arp_work); 1702 1703 /* 1704 * Remove all entries 1705 */ 1706 1707 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1708 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1709 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1710 lec_arp_remove(priv, entry); 1711 lec_arp_put(entry); 1712 } 1713 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1714 } 1715 1716 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 1717 del_timer_sync(&entry->timer); 1718 lec_arp_clear_vccs(entry); 1719 hlist_del(&entry->next); 1720 lec_arp_put(entry); 1721 } 1722 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1723 1724 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1725 del_timer_sync(&entry->timer); 1726 lec_arp_clear_vccs(entry); 1727 hlist_del(&entry->next); 1728 lec_arp_put(entry); 1729 } 1730 INIT_HLIST_HEAD(&priv->lec_no_forward); 1731 1732 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1733 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1734 lec_arp_clear_vccs(entry); 1735 hlist_del(&entry->next); 1736 lec_arp_put(entry); 1737 } 1738 INIT_HLIST_HEAD(&priv->mcast_fwds); 1739 priv->mcast_vcc = NULL; 1740 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1741 } 1742 1743 /* 1744 * Find entry by mac_address 1745 */ 1746 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1747 unsigned char *mac_addr) 1748 { 1749 struct hlist_node *node; 1750 struct hlist_head *head; 1751 struct lec_arp_table *entry; 1752 1753 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1754 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1755 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1756 1757 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1758 hlist_for_each_entry(entry, node, head, next) { 1759 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1760 return entry; 1761 } 1762 } 1763 return NULL; 1764 } 1765 1766 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1767 unsigned char *mac_addr) 1768 { 1769 struct lec_arp_table *to_return; 1770 1771 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1772 if (!to_return) { 1773 printk("LEC: Arp entry kmalloc failed\n"); 1774 return NULL; 1775 } 1776 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1777 INIT_HLIST_NODE(&to_return->next); 1778 setup_timer(&to_return->timer, lec_arp_expire_arp, 1779 (unsigned long)to_return); 1780 to_return->last_used = jiffies; 1781 to_return->priv = priv; 1782 skb_queue_head_init(&to_return->tx_wait); 1783 atomic_set(&to_return->usage, 1); 1784 return to_return; 1785 } 1786 1787 /* Arp sent timer expired */ 1788 static void lec_arp_expire_arp(unsigned long data) 1789 { 1790 struct lec_arp_table *entry; 1791 1792 entry = (struct lec_arp_table *)data; 1793 1794 pr_debug("lec_arp_expire_arp\n"); 1795 if (entry->status == ESI_ARP_PENDING) { 1796 if (entry->no_tries <= entry->priv->max_retry_count) { 1797 if (entry->is_rdesc) 1798 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1799 entry->mac_addr, NULL, NULL); 1800 else 1801 send_to_lecd(entry->priv, l_arp_xmt, 1802 entry->mac_addr, NULL, NULL); 1803 entry->no_tries++; 1804 } 1805 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1806 } 1807 } 1808 1809 /* Unknown/unused vcc expire, remove associated entry */ 1810 static void lec_arp_expire_vcc(unsigned long data) 1811 { 1812 unsigned long flags; 1813 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1814 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1815 1816 del_timer(&to_remove->timer); 1817 1818 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1819 to_remove, priv, 1820 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1821 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1822 1823 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1824 hlist_del(&to_remove->next); 1825 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1826 1827 lec_arp_clear_vccs(to_remove); 1828 lec_arp_put(to_remove); 1829 } 1830 1831 /* 1832 * Expire entries. 1833 * 1. Re-set timer 1834 * 2. For each entry, delete entries that have aged past the age limit. 1835 * 3. For each entry, depending on the status of the entry, perform 1836 * the following maintenance. 1837 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1838 * tick_count is above the max_unknown_frame_time, clear 1839 * the tick_count to zero and clear the packets_flooded counter 1840 * to zero. This supports the packet rate limit per address 1841 * while flooding unknowns. 1842 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1843 * than or equal to the path_switching_delay, change the status 1844 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1845 * regardless of the progress of the flush protocol. 1846 */ 1847 static void lec_arp_check_expire(struct work_struct *work) 1848 { 1849 unsigned long flags; 1850 struct lec_priv *priv = 1851 container_of(work, struct lec_priv, lec_arp_work.work); 1852 struct hlist_node *node, *next; 1853 struct lec_arp_table *entry; 1854 unsigned long now; 1855 unsigned long time_to_check; 1856 int i; 1857 1858 pr_debug("lec_arp_check_expire %p\n", priv); 1859 now = jiffies; 1860 restart: 1861 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1862 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1863 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1864 if ((entry->flags) & LEC_REMOTE_FLAG && 1865 priv->topology_change) 1866 time_to_check = priv->forward_delay_time; 1867 else 1868 time_to_check = priv->aging_time; 1869 1870 pr_debug("About to expire: %lx - %lx > %lx\n", 1871 now, entry->last_used, time_to_check); 1872 if (time_after(now, entry->last_used + time_to_check) 1873 && !(entry->flags & LEC_PERMANENT_FLAG) 1874 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1875 /* Remove entry */ 1876 pr_debug("LEC:Entry timed out\n"); 1877 lec_arp_remove(priv, entry); 1878 lec_arp_put(entry); 1879 } else { 1880 /* Something else */ 1881 if ((entry->status == ESI_VC_PENDING || 1882 entry->status == ESI_ARP_PENDING) 1883 && time_after_eq(now, 1884 entry->timestamp + 1885 priv-> 1886 max_unknown_frame_time)) { 1887 entry->timestamp = jiffies; 1888 entry->packets_flooded = 0; 1889 if (entry->status == ESI_VC_PENDING) 1890 send_to_lecd(priv, l_svc_setup, 1891 entry->mac_addr, 1892 entry->atm_addr, 1893 NULL); 1894 } 1895 if (entry->status == ESI_FLUSH_PENDING 1896 && 1897 time_after_eq(now, entry->timestamp + 1898 priv->path_switching_delay)) { 1899 struct sk_buff *skb; 1900 struct atm_vcc *vcc = entry->vcc; 1901 1902 lec_arp_hold(entry); 1903 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1904 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1905 lec_send(vcc, skb, entry->priv); 1906 entry->last_used = jiffies; 1907 entry->status = ESI_FORWARD_DIRECT; 1908 lec_arp_put(entry); 1909 goto restart; 1910 } 1911 } 1912 } 1913 } 1914 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1915 1916 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1917 } 1918 1919 /* 1920 * Try to find vcc where mac_address is attached. 1921 * 1922 */ 1923 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1924 unsigned char *mac_to_find, int is_rdesc, 1925 struct lec_arp_table **ret_entry) 1926 { 1927 unsigned long flags; 1928 struct lec_arp_table *entry; 1929 struct atm_vcc *found; 1930 1931 if (mac_to_find[0] & 0x01) { 1932 switch (priv->lane_version) { 1933 case 1: 1934 return priv->mcast_vcc; 1935 break; 1936 case 2: /* LANE2 wants arp for multicast addresses */ 1937 if (!compare_ether_addr(mac_to_find, bus_mac)) 1938 return priv->mcast_vcc; 1939 break; 1940 default: 1941 break; 1942 } 1943 } 1944 1945 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1946 entry = lec_arp_find(priv, mac_to_find); 1947 1948 if (entry) { 1949 if (entry->status == ESI_FORWARD_DIRECT) { 1950 /* Connection Ok */ 1951 entry->last_used = jiffies; 1952 lec_arp_hold(entry); 1953 *ret_entry = entry; 1954 found = entry->vcc; 1955 goto out; 1956 } 1957 /* 1958 * If the LE_ARP cache entry is still pending, reset count to 0 1959 * so another LE_ARP request can be made for this frame. 1960 */ 1961 if (entry->status == ESI_ARP_PENDING) { 1962 entry->no_tries = 0; 1963 } 1964 /* 1965 * Data direct VC not yet set up, check to see if the unknown 1966 * frame count is greater than the limit. If the limit has 1967 * not been reached, allow the caller to send packet to 1968 * BUS. 1969 */ 1970 if (entry->status != ESI_FLUSH_PENDING && 1971 entry->packets_flooded < 1972 priv->maximum_unknown_frame_count) { 1973 entry->packets_flooded++; 1974 pr_debug("LEC_ARP: Flooding..\n"); 1975 found = priv->mcast_vcc; 1976 goto out; 1977 } 1978 /* 1979 * We got here because entry->status == ESI_FLUSH_PENDING 1980 * or BUS flood limit was reached for an entry which is 1981 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 1982 */ 1983 lec_arp_hold(entry); 1984 *ret_entry = entry; 1985 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status, 1986 entry->vcc); 1987 found = NULL; 1988 } else { 1989 /* No matching entry was found */ 1990 entry = make_entry(priv, mac_to_find); 1991 pr_debug("LEC_ARP: Making entry\n"); 1992 if (!entry) { 1993 found = priv->mcast_vcc; 1994 goto out; 1995 } 1996 lec_arp_add(priv, entry); 1997 /* We want arp-request(s) to be sent */ 1998 entry->packets_flooded = 1; 1999 entry->status = ESI_ARP_PENDING; 2000 entry->no_tries = 1; 2001 entry->last_used = entry->timestamp = jiffies; 2002 entry->is_rdesc = is_rdesc; 2003 if (entry->is_rdesc) 2004 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 2005 NULL); 2006 else 2007 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 2008 entry->timer.expires = jiffies + (1 * HZ); 2009 entry->timer.function = lec_arp_expire_arp; 2010 add_timer(&entry->timer); 2011 found = priv->mcast_vcc; 2012 } 2013 2014 out: 2015 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2016 return found; 2017 } 2018 2019 static int 2020 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 2021 unsigned long permanent) 2022 { 2023 unsigned long flags; 2024 struct hlist_node *node, *next; 2025 struct lec_arp_table *entry; 2026 int i; 2027 2028 pr_debug("lec_addr_delete\n"); 2029 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2030 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2031 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2032 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2033 && (permanent || 2034 !(entry->flags & LEC_PERMANENT_FLAG))) { 2035 lec_arp_remove(priv, entry); 2036 lec_arp_put(entry); 2037 } 2038 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2039 return 0; 2040 } 2041 } 2042 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2043 return -1; 2044 } 2045 2046 /* 2047 * Notifies: Response to arp_request (atm_addr != NULL) 2048 */ 2049 static void 2050 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 2051 unsigned char *atm_addr, unsigned long remoteflag, 2052 unsigned int targetless_le_arp) 2053 { 2054 unsigned long flags; 2055 struct hlist_node *node, *next; 2056 struct lec_arp_table *entry, *tmp; 2057 int i; 2058 2059 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2060 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2061 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2062 mac_addr[4], mac_addr[5]); 2063 2064 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2065 entry = lec_arp_find(priv, mac_addr); 2066 if (entry == NULL && targetless_le_arp) 2067 goto out; /* 2068 * LANE2: ignore targetless LE_ARPs for which 2069 * we have no entry in the cache. 7.1.30 2070 */ 2071 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2072 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2073 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2074 hlist_del(&entry->next); 2075 del_timer(&entry->timer); 2076 tmp = lec_arp_find(priv, mac_addr); 2077 if (tmp) { 2078 del_timer(&tmp->timer); 2079 tmp->status = ESI_FORWARD_DIRECT; 2080 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2081 tmp->vcc = entry->vcc; 2082 tmp->old_push = entry->old_push; 2083 tmp->last_used = jiffies; 2084 del_timer(&entry->timer); 2085 lec_arp_put(entry); 2086 entry = tmp; 2087 } else { 2088 entry->status = ESI_FORWARD_DIRECT; 2089 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2090 entry->last_used = jiffies; 2091 lec_arp_add(priv, entry); 2092 } 2093 if (remoteflag) 2094 entry->flags |= LEC_REMOTE_FLAG; 2095 else 2096 entry->flags &= ~LEC_REMOTE_FLAG; 2097 pr_debug("After update\n"); 2098 dump_arp_table(priv); 2099 goto out; 2100 } 2101 } 2102 } 2103 2104 entry = lec_arp_find(priv, mac_addr); 2105 if (!entry) { 2106 entry = make_entry(priv, mac_addr); 2107 if (!entry) 2108 goto out; 2109 entry->status = ESI_UNKNOWN; 2110 lec_arp_add(priv, entry); 2111 /* Temporary, changes before end of function */ 2112 } 2113 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2114 del_timer(&entry->timer); 2115 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2116 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2117 if (entry != tmp && 2118 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2119 /* Vcc to this host exists */ 2120 if (tmp->status > ESI_VC_PENDING) { 2121 /* 2122 * ESI_FLUSH_PENDING, 2123 * ESI_FORWARD_DIRECT 2124 */ 2125 entry->vcc = tmp->vcc; 2126 entry->old_push = tmp->old_push; 2127 } 2128 entry->status = tmp->status; 2129 break; 2130 } 2131 } 2132 } 2133 if (remoteflag) 2134 entry->flags |= LEC_REMOTE_FLAG; 2135 else 2136 entry->flags &= ~LEC_REMOTE_FLAG; 2137 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2138 entry->status = ESI_VC_PENDING; 2139 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2140 } 2141 pr_debug("After update2\n"); 2142 dump_arp_table(priv); 2143 out: 2144 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2145 } 2146 2147 /* 2148 * Notifies: Vcc setup ready 2149 */ 2150 static void 2151 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 2152 struct atm_vcc *vcc, 2153 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2154 { 2155 unsigned long flags; 2156 struct hlist_node *node; 2157 struct lec_arp_table *entry; 2158 int i, found_entry = 0; 2159 2160 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2161 if (ioc_data->receive == 2) { 2162 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2163 2164 pr_debug("LEC_ARP: Attaching mcast forward\n"); 2165 #if 0 2166 entry = lec_arp_find(priv, bus_mac); 2167 if (!entry) { 2168 printk("LEC_ARP: Multicast entry not found!\n"); 2169 goto out; 2170 } 2171 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2172 entry->recv_vcc = vcc; 2173 entry->old_recv_push = old_push; 2174 #endif 2175 entry = make_entry(priv, bus_mac); 2176 if (entry == NULL) 2177 goto out; 2178 del_timer(&entry->timer); 2179 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2180 entry->recv_vcc = vcc; 2181 entry->old_recv_push = old_push; 2182 hlist_add_head(&entry->next, &priv->mcast_fwds); 2183 goto out; 2184 } else if (ioc_data->receive == 1) { 2185 /* 2186 * Vcc which we don't want to make default vcc, 2187 * attach it anyway. 2188 */ 2189 pr_debug 2190 ("LEC_ARP:Attaching data direct, not default: " 2191 "%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", 2192 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2193 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2194 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2195 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2196 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2197 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2198 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2199 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2200 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2201 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2202 entry = make_entry(priv, bus_mac); 2203 if (entry == NULL) 2204 goto out; 2205 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2206 memset(entry->mac_addr, 0, ETH_ALEN); 2207 entry->recv_vcc = vcc; 2208 entry->old_recv_push = old_push; 2209 entry->status = ESI_UNKNOWN; 2210 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2211 entry->timer.function = lec_arp_expire_vcc; 2212 hlist_add_head(&entry->next, &priv->lec_no_forward); 2213 add_timer(&entry->timer); 2214 dump_arp_table(priv); 2215 goto out; 2216 } 2217 pr_debug 2218 ("LEC_ARP:Attaching data direct, default: " 2219 "%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", 2220 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2221 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2222 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2223 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2224 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2225 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2226 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2227 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2228 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2229 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2230 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2231 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2232 if (memcmp 2233 (ioc_data->atm_addr, entry->atm_addr, 2234 ATM_ESA_LEN) == 0) { 2235 pr_debug("LEC_ARP: Attaching data direct\n"); 2236 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", 2237 entry->vcc ? entry->vcc->vci : 0, 2238 entry->recv_vcc ? entry->recv_vcc-> 2239 vci : 0); 2240 found_entry = 1; 2241 del_timer(&entry->timer); 2242 entry->vcc = vcc; 2243 entry->old_push = old_push; 2244 if (entry->status == ESI_VC_PENDING) { 2245 if (priv->maximum_unknown_frame_count 2246 == 0) 2247 entry->status = 2248 ESI_FORWARD_DIRECT; 2249 else { 2250 entry->timestamp = jiffies; 2251 entry->status = 2252 ESI_FLUSH_PENDING; 2253 #if 0 2254 send_to_lecd(priv, l_flush_xmt, 2255 NULL, 2256 entry->atm_addr, 2257 NULL); 2258 #endif 2259 } 2260 } else { 2261 /* 2262 * They were forming a connection 2263 * to us, and we to them. Our 2264 * ATM address is numerically lower 2265 * than theirs, so we make connection 2266 * we formed into default VCC (8.1.11). 2267 * Connection they made gets torn 2268 * down. This might confuse some 2269 * clients. Can be changed if 2270 * someone reports trouble... 2271 */ 2272 ; 2273 } 2274 } 2275 } 2276 } 2277 if (found_entry) { 2278 pr_debug("After vcc was added\n"); 2279 dump_arp_table(priv); 2280 goto out; 2281 } 2282 /* 2283 * Not found, snatch address from first data packet that arrives 2284 * from this vcc 2285 */ 2286 entry = make_entry(priv, bus_mac); 2287 if (!entry) 2288 goto out; 2289 entry->vcc = vcc; 2290 entry->old_push = old_push; 2291 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2292 memset(entry->mac_addr, 0, ETH_ALEN); 2293 entry->status = ESI_UNKNOWN; 2294 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2295 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2296 entry->timer.function = lec_arp_expire_vcc; 2297 add_timer(&entry->timer); 2298 pr_debug("After vcc was added\n"); 2299 dump_arp_table(priv); 2300 out: 2301 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2302 } 2303 2304 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2305 { 2306 unsigned long flags; 2307 struct hlist_node *node; 2308 struct lec_arp_table *entry; 2309 int i; 2310 2311 pr_debug("LEC:lec_flush_complete %lx\n", tran_id); 2312 restart: 2313 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2314 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2315 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2316 if (entry->flush_tran_id == tran_id 2317 && entry->status == ESI_FLUSH_PENDING) { 2318 struct sk_buff *skb; 2319 struct atm_vcc *vcc = entry->vcc; 2320 2321 lec_arp_hold(entry); 2322 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2323 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2324 lec_send(vcc, skb, entry->priv); 2325 entry->last_used = jiffies; 2326 entry->status = ESI_FORWARD_DIRECT; 2327 lec_arp_put(entry); 2328 pr_debug("LEC_ARP: Flushed\n"); 2329 goto restart; 2330 } 2331 } 2332 } 2333 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2334 dump_arp_table(priv); 2335 } 2336 2337 static void 2338 lec_set_flush_tran_id(struct lec_priv *priv, 2339 unsigned char *atm_addr, unsigned long tran_id) 2340 { 2341 unsigned long flags; 2342 struct hlist_node *node; 2343 struct lec_arp_table *entry; 2344 int i; 2345 2346 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2347 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2348 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2349 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2350 entry->flush_tran_id = tran_id; 2351 pr_debug("Set flush transaction id to %lx for %p\n", 2352 tran_id, entry); 2353 } 2354 } 2355 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2356 } 2357 2358 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2359 { 2360 unsigned long flags; 2361 unsigned char mac_addr[] = { 2362 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2363 }; 2364 struct lec_arp_table *to_add; 2365 struct lec_vcc_priv *vpriv; 2366 int err = 0; 2367 2368 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2369 return -ENOMEM; 2370 vpriv->xoff = 0; 2371 vpriv->old_pop = vcc->pop; 2372 vcc->user_back = vpriv; 2373 vcc->pop = lec_pop; 2374 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2375 to_add = make_entry(priv, mac_addr); 2376 if (!to_add) { 2377 vcc->pop = vpriv->old_pop; 2378 kfree(vpriv); 2379 err = -ENOMEM; 2380 goto out; 2381 } 2382 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2383 to_add->status = ESI_FORWARD_DIRECT; 2384 to_add->flags |= LEC_PERMANENT_FLAG; 2385 to_add->vcc = vcc; 2386 to_add->old_push = vcc->push; 2387 vcc->push = lec_push; 2388 priv->mcast_vcc = vcc; 2389 lec_arp_add(priv, to_add); 2390 out: 2391 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2392 return err; 2393 } 2394 2395 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2396 { 2397 unsigned long flags; 2398 struct hlist_node *node, *next; 2399 struct lec_arp_table *entry; 2400 int i; 2401 2402 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2403 dump_arp_table(priv); 2404 2405 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2406 2407 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2408 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2409 if (vcc == entry->vcc) { 2410 lec_arp_remove(priv, entry); 2411 lec_arp_put(entry); 2412 if (priv->mcast_vcc == vcc) { 2413 priv->mcast_vcc = NULL; 2414 } 2415 } 2416 } 2417 } 2418 2419 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2420 if (entry->vcc == vcc) { 2421 lec_arp_clear_vccs(entry); 2422 del_timer(&entry->timer); 2423 hlist_del(&entry->next); 2424 lec_arp_put(entry); 2425 } 2426 } 2427 2428 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2429 if (entry->recv_vcc == vcc) { 2430 lec_arp_clear_vccs(entry); 2431 del_timer(&entry->timer); 2432 hlist_del(&entry->next); 2433 lec_arp_put(entry); 2434 } 2435 } 2436 2437 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2438 if (entry->recv_vcc == vcc) { 2439 lec_arp_clear_vccs(entry); 2440 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2441 hlist_del(&entry->next); 2442 lec_arp_put(entry); 2443 } 2444 } 2445 2446 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2447 dump_arp_table(priv); 2448 } 2449 2450 static void 2451 lec_arp_check_empties(struct lec_priv *priv, 2452 struct atm_vcc *vcc, struct sk_buff *skb) 2453 { 2454 unsigned long flags; 2455 struct hlist_node *node, *next; 2456 struct lec_arp_table *entry, *tmp; 2457 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2458 unsigned char *src; 2459 #ifdef CONFIG_TR 2460 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2461 2462 if (priv->is_trdev) 2463 src = tr_hdr->h_source; 2464 else 2465 #endif 2466 src = hdr->h_source; 2467 2468 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2469 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2470 if (vcc == entry->vcc) { 2471 del_timer(&entry->timer); 2472 memcpy(entry->mac_addr, src, ETH_ALEN); 2473 entry->status = ESI_FORWARD_DIRECT; 2474 entry->last_used = jiffies; 2475 /* We might have got an entry */ 2476 if ((tmp = lec_arp_find(priv, src))) { 2477 lec_arp_remove(priv, tmp); 2478 lec_arp_put(tmp); 2479 } 2480 hlist_del(&entry->next); 2481 lec_arp_add(priv, entry); 2482 goto out; 2483 } 2484 } 2485 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); 2486 out: 2487 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2488 } 2489 2490 MODULE_LICENSE("GPL"); 2491