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/proc_fs.h> 25 #include <linux/seq_file.h> 26 27 /* TokenRing if needed */ 28 #ifdef CONFIG_TR 29 #include <linux/trdevice.h> 30 #endif 31 32 /* And atm device */ 33 #include <linux/atmdev.h> 34 #include <linux/atmlec.h> 35 36 /* Proxy LEC knows about bridging */ 37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 38 #include <linux/if_bridge.h> 39 #include "../bridge/br_private.h" 40 41 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; 42 #endif 43 44 /* Modular too */ 45 #include <linux/module.h> 46 #include <linux/init.h> 47 48 #include "lec.h" 49 #include "lec_arpc.h" 50 #include "resources.h" 51 52 #if 0 53 #define DPRINTK printk 54 #else 55 #define DPRINTK(format,args...) 56 #endif 57 58 #define DUMP_PACKETS 0 /* 59 * 0 = None, 60 * 1 = 30 first bytes 61 * 2 = Whole packet 62 */ 63 64 #define LEC_UNRES_QUE_LEN 8 /* 65 * number of tx packets to queue for a 66 * single destination while waiting for SVC 67 */ 68 69 static int lec_open(struct net_device *dev); 70 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); 71 static int lec_close(struct net_device *dev); 72 static struct net_device_stats *lec_get_stats(struct net_device *dev); 73 static void lec_init(struct net_device *dev); 74 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 75 unsigned char *mac_addr); 76 static int lec_arp_remove(struct lec_priv *priv, 77 struct lec_arp_table *to_remove); 78 /* LANE2 functions */ 79 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address, 80 u8 *tlvs, u32 sizeoftlvs); 81 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 82 u8 **tlvs, u32 *sizeoftlvs); 83 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 84 u8 *tlvs, u32 sizeoftlvs); 85 86 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 87 unsigned long permanent); 88 static void lec_arp_check_empties(struct lec_priv *priv, 89 struct atm_vcc *vcc, struct sk_buff *skb); 90 static void lec_arp_destroy(struct lec_priv *priv); 91 static void lec_arp_init(struct lec_priv *priv); 92 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 93 unsigned char *mac_to_find, 94 int is_rdesc, 95 struct lec_arp_table **ret_entry); 96 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 97 unsigned char *atm_addr, unsigned long remoteflag, 98 unsigned int targetless_le_arp); 99 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); 100 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); 101 static void lec_set_flush_tran_id(struct lec_priv *priv, 102 unsigned char *atm_addr, 103 unsigned long tran_id); 104 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 105 struct atm_vcc *vcc, 106 void (*old_push) (struct atm_vcc *vcc, 107 struct sk_buff *skb)); 108 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); 109 110 /* must be done under lec_arp_lock */ 111 static inline void lec_arp_hold(struct lec_arp_table *entry) 112 { 113 atomic_inc(&entry->usage); 114 } 115 116 static inline void lec_arp_put(struct lec_arp_table *entry) 117 { 118 if (atomic_dec_and_test(&entry->usage)) 119 kfree(entry); 120 } 121 122 123 static struct lane2_ops lane2_ops = { 124 lane2_resolve, /* resolve, spec 3.1.3 */ 125 lane2_associate_req, /* associate_req, spec 3.1.4 */ 126 NULL /* associate indicator, spec 3.1.5 */ 127 }; 128 129 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 130 131 /* Device structures */ 132 static struct net_device *dev_lec[MAX_LEC_ITF]; 133 134 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 135 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) 136 { 137 struct ethhdr *eth; 138 char *buff; 139 struct lec_priv *priv; 140 141 /* 142 * Check if this is a BPDU. If so, ask zeppelin to send 143 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit 144 * as the Config BPDU has 145 */ 146 eth = (struct ethhdr *)skb->data; 147 buff = skb->data + skb->dev->hard_header_len; 148 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { 149 struct sock *sk; 150 struct sk_buff *skb2; 151 struct atmlec_msg *mesg; 152 153 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 154 if (skb2 == NULL) 155 return; 156 skb2->len = sizeof(struct atmlec_msg); 157 mesg = (struct atmlec_msg *)skb2->data; 158 mesg->type = l_topology_change; 159 buff += 4; 160 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ 161 162 priv = (struct lec_priv *)dev->priv; 163 atm_force_charge(priv->lecd, skb2->truesize); 164 sk = sk_atm(priv->lecd); 165 skb_queue_tail(&sk->sk_receive_queue, skb2); 166 sk->sk_data_ready(sk, skb2->len); 167 } 168 169 return; 170 } 171 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 172 173 /* 174 * Modelled after tr_type_trans 175 * All multicast and ARE or STE frames go to BUS. 176 * Non source routed frames go by destination address. 177 * Last hop source routed frames go by destination address. 178 * Not last hop source routed frames go by _next_ route descriptor. 179 * Returns pointer to destination MAC address or fills in rdesc 180 * and returns NULL. 181 */ 182 #ifdef CONFIG_TR 183 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) 184 { 185 struct trh_hdr *trh; 186 int riflen, num_rdsc; 187 188 trh = (struct trh_hdr *)packet; 189 if (trh->daddr[0] & (uint8_t) 0x80) 190 return bus_mac; /* multicast */ 191 192 if (trh->saddr[0] & TR_RII) { 193 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; 194 if ((ntohs(trh->rcf) >> 13) != 0) 195 return bus_mac; /* ARE or STE */ 196 } else 197 return trh->daddr; /* not source routed */ 198 199 if (riflen < 6) 200 return trh->daddr; /* last hop, source routed */ 201 202 /* riflen is 6 or more, packet has more than one route descriptor */ 203 num_rdsc = (riflen / 2) - 1; 204 memset(rdesc, 0, ETH_ALEN); 205 /* offset 4 comes from LAN destination field in LE control frames */ 206 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) 207 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); 208 else { 209 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); 210 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); 211 } 212 213 return NULL; 214 } 215 #endif /* CONFIG_TR */ 216 217 /* 218 * Open/initialize the netdevice. This is called (in the current kernel) 219 * sometime after booting when the 'ifconfig' program is run. 220 * 221 * This routine should set everything up anew at each open, even 222 * registers that "should" only need to be set once at boot, so that 223 * there is non-reboot way to recover if something goes wrong. 224 */ 225 226 static int lec_open(struct net_device *dev) 227 { 228 struct lec_priv *priv = (struct lec_priv *)dev->priv; 229 230 netif_start_queue(dev); 231 memset(&priv->stats, 0, sizeof(struct net_device_stats)); 232 233 return 0; 234 } 235 236 static __inline__ void 237 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) 238 { 239 ATM_SKB(skb)->vcc = vcc; 240 ATM_SKB(skb)->atm_options = vcc->atm_options; 241 242 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 243 if (vcc->send(vcc, skb) < 0) { 244 priv->stats.tx_dropped++; 245 return; 246 } 247 248 priv->stats.tx_packets++; 249 priv->stats.tx_bytes += skb->len; 250 } 251 252 static void lec_tx_timeout(struct net_device *dev) 253 { 254 printk(KERN_INFO "%s: tx timeout\n", dev->name); 255 dev->trans_start = jiffies; 256 netif_wake_queue(dev); 257 } 258 259 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev) 260 { 261 struct sk_buff *skb2; 262 struct lec_priv *priv = (struct lec_priv *)dev->priv; 263 struct lecdatahdr_8023 *lec_h; 264 struct atm_vcc *vcc; 265 struct lec_arp_table *entry; 266 unsigned char *dst; 267 int min_frame_size; 268 #ifdef CONFIG_TR 269 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ 270 #endif 271 int is_rdesc; 272 #if DUMP_PACKETS > 0 273 char buf[300]; 274 int i = 0; 275 #endif /* DUMP_PACKETS >0 */ 276 277 DPRINTK("lec_start_xmit called\n"); 278 if (!priv->lecd) { 279 printk("%s:No lecd attached\n", dev->name); 280 priv->stats.tx_errors++; 281 netif_stop_queue(dev); 282 return -EUNATCH; 283 } 284 285 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n", 286 (long)skb->head, (long)skb->data, (long)skb->tail, 287 (long)skb->end); 288 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 289 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) 290 lec_handle_bridge(skb, dev); 291 #endif 292 293 /* Make sure we have room for lec_id */ 294 if (skb_headroom(skb) < 2) { 295 296 DPRINTK("lec_start_xmit: reallocating skb\n"); 297 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); 298 kfree_skb(skb); 299 if (skb2 == NULL) 300 return 0; 301 skb = skb2; 302 } 303 skb_push(skb, 2); 304 305 /* Put le header to place, works for TokenRing too */ 306 lec_h = (struct lecdatahdr_8023 *)skb->data; 307 lec_h->le_header = htons(priv->lecid); 308 309 #ifdef CONFIG_TR 310 /* 311 * Ugly. Use this to realign Token Ring packets for 312 * e.g. PCA-200E driver. 313 */ 314 if (priv->is_trdev) { 315 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); 316 kfree_skb(skb); 317 if (skb2 == NULL) 318 return 0; 319 skb = skb2; 320 } 321 #endif 322 323 #if DUMP_PACKETS > 0 324 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, 325 skb->len, priv->lecid); 326 #if DUMP_PACKETS >= 2 327 for (i = 0; i < skb->len && i < 99; i++) { 328 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 329 } 330 #elif DUMP_PACKETS >= 1 331 for (i = 0; i < skb->len && i < 30; i++) { 332 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 333 } 334 #endif /* DUMP_PACKETS >= 1 */ 335 if (i == skb->len) 336 printk("%s\n", buf); 337 else 338 printk("%s...\n", buf); 339 #endif /* DUMP_PACKETS > 0 */ 340 341 /* Minimum ethernet-frame size */ 342 #ifdef CONFIG_TR 343 if (priv->is_trdev) 344 min_frame_size = LEC_MINIMUM_8025_SIZE; 345 else 346 #endif 347 min_frame_size = LEC_MINIMUM_8023_SIZE; 348 if (skb->len < min_frame_size) { 349 if ((skb->len + skb_tailroom(skb)) < min_frame_size) { 350 skb2 = skb_copy_expand(skb, 0, 351 min_frame_size - skb->truesize, 352 GFP_ATOMIC); 353 dev_kfree_skb(skb); 354 if (skb2 == NULL) { 355 priv->stats.tx_dropped++; 356 return 0; 357 } 358 skb = skb2; 359 } 360 skb_put(skb, min_frame_size - skb->len); 361 } 362 363 /* Send to right vcc */ 364 is_rdesc = 0; 365 dst = lec_h->h_dest; 366 #ifdef CONFIG_TR 367 if (priv->is_trdev) { 368 dst = get_tr_dst(skb->data + 2, rdesc); 369 if (dst == NULL) { 370 dst = rdesc; 371 is_rdesc = 1; 372 } 373 } 374 #endif 375 entry = NULL; 376 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); 377 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name, 378 vcc, vcc ? vcc->flags : 0, entry); 379 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { 380 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { 381 DPRINTK("%s:lec_start_xmit: queuing packet, ", 382 dev->name); 383 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", 384 lec_h->h_dest[0], lec_h->h_dest[1], 385 lec_h->h_dest[2], lec_h->h_dest[3], 386 lec_h->h_dest[4], lec_h->h_dest[5]); 387 skb_queue_tail(&entry->tx_wait, skb); 388 } else { 389 DPRINTK 390 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", 391 dev->name); 392 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", 393 lec_h->h_dest[0], lec_h->h_dest[1], 394 lec_h->h_dest[2], lec_h->h_dest[3], 395 lec_h->h_dest[4], lec_h->h_dest[5]); 396 priv->stats.tx_dropped++; 397 dev_kfree_skb(skb); 398 } 399 goto out; 400 } 401 #if DUMP_PACKETS > 0 402 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); 403 #endif /* DUMP_PACKETS > 0 */ 404 405 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { 406 DPRINTK("lec.c: emptying tx queue, "); 407 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", 408 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], 409 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); 410 lec_send(vcc, skb2, priv); 411 } 412 413 lec_send(vcc, skb, priv); 414 415 if (!atm_may_send(vcc, 0)) { 416 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 417 418 vpriv->xoff = 1; 419 netif_stop_queue(dev); 420 421 /* 422 * vcc->pop() might have occurred in between, making 423 * the vcc usuable again. Since xmit is serialized, 424 * this is the only situation we have to re-test. 425 */ 426 427 if (atm_may_send(vcc, 0)) 428 netif_wake_queue(dev); 429 } 430 431 out: 432 if (entry) 433 lec_arp_put(entry); 434 dev->trans_start = jiffies; 435 return 0; 436 } 437 438 /* The inverse routine to net_open(). */ 439 static int lec_close(struct net_device *dev) 440 { 441 netif_stop_queue(dev); 442 return 0; 443 } 444 445 /* 446 * Get the current statistics. 447 * This may be called with the card open or closed. 448 */ 449 static struct net_device_stats *lec_get_stats(struct net_device *dev) 450 { 451 return &((struct lec_priv *)dev->priv)->stats; 452 } 453 454 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) 455 { 456 unsigned long flags; 457 struct net_device *dev = (struct net_device *)vcc->proto_data; 458 struct lec_priv *priv = (struct lec_priv *)dev->priv; 459 struct atmlec_msg *mesg; 460 struct lec_arp_table *entry; 461 int i; 462 char *tmp; /* FIXME */ 463 464 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 465 mesg = (struct atmlec_msg *)skb->data; 466 tmp = skb->data; 467 tmp += sizeof(struct atmlec_msg); 468 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type); 469 switch (mesg->type) { 470 case l_set_mac_addr: 471 for (i = 0; i < 6; i++) { 472 dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; 473 } 474 break; 475 case l_del_mac_addr: 476 for (i = 0; i < 6; i++) { 477 dev->dev_addr[i] = 0; 478 } 479 break; 480 case l_addr_delete: 481 lec_addr_delete(priv, mesg->content.normal.atm_addr, 482 mesg->content.normal.flag); 483 break; 484 case l_topology_change: 485 priv->topology_change = mesg->content.normal.flag; 486 break; 487 case l_flush_complete: 488 lec_flush_complete(priv, mesg->content.normal.flag); 489 break; 490 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ 491 spin_lock_irqsave(&priv->lec_arp_lock, flags); 492 entry = lec_arp_find(priv, mesg->content.normal.mac_addr); 493 lec_arp_remove(priv, entry); 494 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 495 496 if (mesg->content.normal.no_source_le_narp) 497 break; 498 /* FALL THROUGH */ 499 case l_arp_update: 500 lec_arp_update(priv, mesg->content.normal.mac_addr, 501 mesg->content.normal.atm_addr, 502 mesg->content.normal.flag, 503 mesg->content.normal.targetless_le_arp); 504 DPRINTK("lec: in l_arp_update\n"); 505 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ 506 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", 507 mesg->sizeoftlvs); 508 lane2_associate_ind(dev, mesg->content.normal.mac_addr, 509 tmp, mesg->sizeoftlvs); 510 } 511 break; 512 case l_config: 513 priv->maximum_unknown_frame_count = 514 mesg->content.config.maximum_unknown_frame_count; 515 priv->max_unknown_frame_time = 516 (mesg->content.config.max_unknown_frame_time * HZ); 517 priv->max_retry_count = mesg->content.config.max_retry_count; 518 priv->aging_time = (mesg->content.config.aging_time * HZ); 519 priv->forward_delay_time = 520 (mesg->content.config.forward_delay_time * HZ); 521 priv->arp_response_time = 522 (mesg->content.config.arp_response_time * HZ); 523 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); 524 priv->path_switching_delay = 525 (mesg->content.config.path_switching_delay * HZ); 526 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ 527 priv->lane2_ops = NULL; 528 if (priv->lane_version > 1) 529 priv->lane2_ops = &lane2_ops; 530 if (dev->change_mtu(dev, mesg->content.config.mtu)) 531 printk("%s: change_mtu to %d failed\n", dev->name, 532 mesg->content.config.mtu); 533 priv->is_proxy = mesg->content.config.is_proxy; 534 break; 535 case l_flush_tran_id: 536 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, 537 mesg->content.normal.flag); 538 break; 539 case l_set_lecid: 540 priv->lecid = 541 (unsigned short)(0xffff & mesg->content.normal.flag); 542 break; 543 case l_should_bridge: 544 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 545 { 546 struct net_bridge_fdb_entry *f; 547 548 DPRINTK 549 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n", 550 dev->name, mesg->content.proxy.mac_addr[0], 551 mesg->content.proxy.mac_addr[1], 552 mesg->content.proxy.mac_addr[2], 553 mesg->content.proxy.mac_addr[3], 554 mesg->content.proxy.mac_addr[4], 555 mesg->content.proxy.mac_addr[5]); 556 557 if (br_fdb_get_hook == NULL || dev->br_port == NULL) 558 break; 559 560 f = br_fdb_get_hook(dev->br_port->br, 561 mesg->content.proxy.mac_addr); 562 if (f != NULL && f->dst->dev != dev 563 && f->dst->state == BR_STATE_FORWARDING) { 564 /* hit from bridge table, send LE_ARP_RESPONSE */ 565 struct sk_buff *skb2; 566 struct sock *sk; 567 568 DPRINTK 569 ("%s: entry found, responding to zeppelin\n", 570 dev->name); 571 skb2 = 572 alloc_skb(sizeof(struct atmlec_msg), 573 GFP_ATOMIC); 574 if (skb2 == NULL) { 575 br_fdb_put_hook(f); 576 break; 577 } 578 skb2->len = sizeof(struct atmlec_msg); 579 memcpy(skb2->data, mesg, 580 sizeof(struct atmlec_msg)); 581 atm_force_charge(priv->lecd, skb2->truesize); 582 sk = sk_atm(priv->lecd); 583 skb_queue_tail(&sk->sk_receive_queue, skb2); 584 sk->sk_data_ready(sk, skb2->len); 585 } 586 if (f != NULL) 587 br_fdb_put_hook(f); 588 } 589 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 590 break; 591 default: 592 printk("%s: Unknown message type %d\n", dev->name, mesg->type); 593 dev_kfree_skb(skb); 594 return -EINVAL; 595 } 596 dev_kfree_skb(skb); 597 return 0; 598 } 599 600 static void lec_atm_close(struct atm_vcc *vcc) 601 { 602 struct sk_buff *skb; 603 struct net_device *dev = (struct net_device *)vcc->proto_data; 604 struct lec_priv *priv = (struct lec_priv *)dev->priv; 605 606 priv->lecd = NULL; 607 /* Do something needful? */ 608 609 netif_stop_queue(dev); 610 lec_arp_destroy(priv); 611 612 if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) 613 printk("%s lec_atm_close: closing with messages pending\n", 614 dev->name); 615 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { 616 atm_return(vcc, skb->truesize); 617 dev_kfree_skb(skb); 618 } 619 620 printk("%s: Shut down!\n", dev->name); 621 module_put(THIS_MODULE); 622 } 623 624 static struct atmdev_ops lecdev_ops = { 625 .close = lec_atm_close, 626 .send = lec_atm_send 627 }; 628 629 static struct atm_dev lecatm_dev = { 630 .ops = &lecdev_ops, 631 .type = "lec", 632 .number = 999, /* dummy device number */ 633 .lock = SPIN_LOCK_UNLOCKED 634 }; 635 636 /* 637 * LANE2: new argument struct sk_buff *data contains 638 * the LE_ARP based TLVs introduced in the LANE2 spec 639 */ 640 static int 641 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, 642 unsigned char *mac_addr, unsigned char *atm_addr, 643 struct sk_buff *data) 644 { 645 struct sock *sk; 646 struct sk_buff *skb; 647 struct atmlec_msg *mesg; 648 649 if (!priv || !priv->lecd) { 650 return -1; 651 } 652 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 653 if (!skb) 654 return -1; 655 skb->len = sizeof(struct atmlec_msg); 656 mesg = (struct atmlec_msg *)skb->data; 657 memset(mesg, 0, sizeof(struct atmlec_msg)); 658 mesg->type = type; 659 if (data != NULL) 660 mesg->sizeoftlvs = data->len; 661 if (mac_addr) 662 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); 663 else 664 mesg->content.normal.targetless_le_arp = 1; 665 if (atm_addr) 666 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); 667 668 atm_force_charge(priv->lecd, skb->truesize); 669 sk = sk_atm(priv->lecd); 670 skb_queue_tail(&sk->sk_receive_queue, skb); 671 sk->sk_data_ready(sk, skb->len); 672 673 if (data != NULL) { 674 DPRINTK("lec: about to send %d bytes of data\n", data->len); 675 atm_force_charge(priv->lecd, data->truesize); 676 skb_queue_tail(&sk->sk_receive_queue, data); 677 sk->sk_data_ready(sk, skb->len); 678 } 679 680 return 0; 681 } 682 683 /* shamelessly stolen from drivers/net/net_init.c */ 684 static int lec_change_mtu(struct net_device *dev, int new_mtu) 685 { 686 if ((new_mtu < 68) || (new_mtu > 18190)) 687 return -EINVAL; 688 dev->mtu = new_mtu; 689 return 0; 690 } 691 692 static void lec_set_multicast_list(struct net_device *dev) 693 { 694 /* 695 * by default, all multicast frames arrive over the bus. 696 * eventually support selective multicast service 697 */ 698 return; 699 } 700 701 static void lec_init(struct net_device *dev) 702 { 703 dev->change_mtu = lec_change_mtu; 704 dev->open = lec_open; 705 dev->stop = lec_close; 706 dev->hard_start_xmit = lec_start_xmit; 707 dev->tx_timeout = lec_tx_timeout; 708 709 dev->get_stats = lec_get_stats; 710 dev->set_multicast_list = lec_set_multicast_list; 711 dev->do_ioctl = NULL; 712 printk("%s: Initialized!\n", dev->name); 713 return; 714 } 715 716 static unsigned char lec_ctrl_magic[] = { 717 0xff, 718 0x00, 719 0x01, 720 0x01 721 }; 722 723 #define LEC_DATA_DIRECT_8023 2 724 #define LEC_DATA_DIRECT_8025 3 725 726 static int lec_is_data_direct(struct atm_vcc *vcc) 727 { 728 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || 729 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); 730 } 731 732 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 733 { 734 unsigned long flags; 735 struct net_device *dev = (struct net_device *)vcc->proto_data; 736 struct lec_priv *priv = (struct lec_priv *)dev->priv; 737 738 #if DUMP_PACKETS >0 739 int i = 0; 740 char buf[300]; 741 742 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, 743 vcc->vpi, vcc->vci); 744 #endif 745 if (!skb) { 746 DPRINTK("%s: null skb\n", dev->name); 747 lec_vcc_close(priv, vcc); 748 return; 749 } 750 #if DUMP_PACKETS > 0 751 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, 752 skb->len, priv->lecid); 753 #if DUMP_PACKETS >= 2 754 for (i = 0; i < skb->len && i < 99; i++) { 755 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 756 } 757 #elif DUMP_PACKETS >= 1 758 for (i = 0; i < skb->len && i < 30; i++) { 759 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); 760 } 761 #endif /* DUMP_PACKETS >= 1 */ 762 if (i == skb->len) 763 printk("%s\n", buf); 764 else 765 printk("%s...\n", buf); 766 #endif /* DUMP_PACKETS > 0 */ 767 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ 768 struct sock *sk = sk_atm(vcc); 769 770 DPRINTK("%s: To daemon\n", dev->name); 771 skb_queue_tail(&sk->sk_receive_queue, skb); 772 sk->sk_data_ready(sk, skb->len); 773 } else { /* Data frame, queue to protocol handlers */ 774 struct lec_arp_table *entry; 775 unsigned char *src, *dst; 776 777 atm_return(vcc, skb->truesize); 778 if (*(__be16 *) skb->data == htons(priv->lecid) || 779 !priv->lecd || !(dev->flags & IFF_UP)) { 780 /* 781 * Probably looping back, or if lecd is missing, 782 * lecd has gone down 783 */ 784 DPRINTK("Ignoring frame...\n"); 785 dev_kfree_skb(skb); 786 return; 787 } 788 #ifdef CONFIG_TR 789 if (priv->is_trdev) 790 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; 791 else 792 #endif 793 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; 794 795 /* 796 * If this is a Data Direct VCC, and the VCC does not match 797 * the LE_ARP cache entry, delete the LE_ARP cache entry. 798 */ 799 spin_lock_irqsave(&priv->lec_arp_lock, flags); 800 if (lec_is_data_direct(vcc)) { 801 #ifdef CONFIG_TR 802 if (priv->is_trdev) 803 src = 804 ((struct lecdatahdr_8025 *)skb->data)-> 805 h_source; 806 else 807 #endif 808 src = 809 ((struct lecdatahdr_8023 *)skb->data)-> 810 h_source; 811 entry = lec_arp_find(priv, src); 812 if (entry && entry->vcc != vcc) { 813 lec_arp_remove(priv, entry); 814 lec_arp_put(entry); 815 } 816 } 817 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 818 819 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ 820 !priv->is_proxy && /* Proxy wants all the packets */ 821 memcmp(dst, dev->dev_addr, dev->addr_len)) { 822 dev_kfree_skb(skb); 823 return; 824 } 825 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 826 lec_arp_check_empties(priv, vcc, skb); 827 } 828 skb_pull(skb, 2); /* skip lec_id */ 829 #ifdef CONFIG_TR 830 if (priv->is_trdev) 831 skb->protocol = tr_type_trans(skb, dev); 832 else 833 #endif 834 { 835 skb->dev = dev; 836 skb->protocol = eth_type_trans(skb, dev); 837 } 838 priv->stats.rx_packets++; 839 priv->stats.rx_bytes += skb->len; 840 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 841 netif_rx(skb); 842 } 843 } 844 845 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 846 { 847 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 848 struct net_device *dev = skb->dev; 849 850 if (vpriv == NULL) { 851 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 852 return; 853 } 854 855 vpriv->old_pop(vcc, skb); 856 857 if (vpriv->xoff && atm_may_send(vcc, 0)) { 858 vpriv->xoff = 0; 859 if (netif_running(dev) && netif_queue_stopped(dev)) 860 netif_wake_queue(dev); 861 } 862 } 863 864 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 865 { 866 struct lec_vcc_priv *vpriv; 867 int bytes_left; 868 struct atmlec_ioc ioc_data; 869 870 /* Lecd must be up in this case */ 871 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 872 if (bytes_left != 0) { 873 printk 874 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 875 bytes_left); 876 } 877 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 878 !dev_lec[ioc_data.dev_num]) 879 return -EINVAL; 880 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 881 return -ENOMEM; 882 vpriv->xoff = 0; 883 vpriv->old_pop = vcc->pop; 884 vcc->user_back = vpriv; 885 vcc->pop = lec_pop; 886 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, 887 &ioc_data, vcc, vcc->push); 888 vcc->proto_data = dev_lec[ioc_data.dev_num]; 889 vcc->push = lec_push; 890 return 0; 891 } 892 893 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 894 { 895 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 896 return -EINVAL; 897 vcc->proto_data = dev_lec[arg]; 898 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); 899 } 900 901 /* Initialize device. */ 902 static int lecd_attach(struct atm_vcc *vcc, int arg) 903 { 904 int i; 905 struct lec_priv *priv; 906 907 if (arg < 0) 908 i = 0; 909 else 910 i = arg; 911 #ifdef CONFIG_TR 912 if (arg >= MAX_LEC_ITF) 913 return -EINVAL; 914 #else /* Reserve the top NUM_TR_DEVS for TR */ 915 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 916 return -EINVAL; 917 #endif 918 if (!dev_lec[i]) { 919 int is_trdev, size; 920 921 is_trdev = 0; 922 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 923 is_trdev = 1; 924 925 size = sizeof(struct lec_priv); 926 #ifdef CONFIG_TR 927 if (is_trdev) 928 dev_lec[i] = alloc_trdev(size); 929 else 930 #endif 931 dev_lec[i] = alloc_etherdev(size); 932 if (!dev_lec[i]) 933 return -ENOMEM; 934 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 935 if (register_netdev(dev_lec[i])) { 936 free_netdev(dev_lec[i]); 937 return -EINVAL; 938 } 939 940 priv = dev_lec[i]->priv; 941 priv->is_trdev = is_trdev; 942 lec_init(dev_lec[i]); 943 } else { 944 priv = dev_lec[i]->priv; 945 if (priv->lecd) 946 return -EADDRINUSE; 947 } 948 lec_arp_init(priv); 949 priv->itfnum = i; /* LANE2 addition */ 950 priv->lecd = vcc; 951 vcc->dev = &lecatm_dev; 952 vcc_insert_socket(sk_atm(vcc)); 953 954 vcc->proto_data = dev_lec[i]; 955 set_bit(ATM_VF_META, &vcc->flags); 956 set_bit(ATM_VF_READY, &vcc->flags); 957 958 /* Set default values to these variables */ 959 priv->maximum_unknown_frame_count = 1; 960 priv->max_unknown_frame_time = (1 * HZ); 961 priv->vcc_timeout_period = (1200 * HZ); 962 priv->max_retry_count = 1; 963 priv->aging_time = (300 * HZ); 964 priv->forward_delay_time = (15 * HZ); 965 priv->topology_change = 0; 966 priv->arp_response_time = (1 * HZ); 967 priv->flush_timeout = (4 * HZ); 968 priv->path_switching_delay = (6 * HZ); 969 970 if (dev_lec[i]->flags & IFF_UP) { 971 netif_start_queue(dev_lec[i]); 972 } 973 __module_get(THIS_MODULE); 974 return i; 975 } 976 977 #ifdef CONFIG_PROC_FS 978 static char *lec_arp_get_status_string(unsigned char status) 979 { 980 static char *lec_arp_status_string[] = { 981 "ESI_UNKNOWN ", 982 "ESI_ARP_PENDING ", 983 "ESI_VC_PENDING ", 984 "<Undefined> ", 985 "ESI_FLUSH_PENDING ", 986 "ESI_FORWARD_DIRECT" 987 }; 988 989 if (status > ESI_FORWARD_DIRECT) 990 status = 3; /* ESI_UNDEFINED */ 991 return lec_arp_status_string[status]; 992 } 993 994 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 995 { 996 int i; 997 998 for (i = 0; i < ETH_ALEN; i++) 999 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 1000 seq_printf(seq, " "); 1001 for (i = 0; i < ATM_ESA_LEN; i++) 1002 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 1003 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 1004 entry->flags & 0xffff); 1005 if (entry->vcc) 1006 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 1007 else 1008 seq_printf(seq, " "); 1009 if (entry->recv_vcc) { 1010 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 1011 entry->recv_vcc->vci); 1012 } 1013 seq_putc(seq, '\n'); 1014 } 1015 1016 struct lec_state { 1017 unsigned long flags; 1018 struct lec_priv *locked; 1019 struct hlist_node *node; 1020 struct net_device *dev; 1021 int itf; 1022 int arp_table; 1023 int misc_table; 1024 }; 1025 1026 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1027 loff_t *l) 1028 { 1029 struct hlist_node *e = state->node; 1030 struct lec_arp_table *tmp; 1031 1032 if (!e) 1033 e = tbl->first; 1034 if (e == (void *)1) { 1035 e = tbl->first; 1036 --*l; 1037 } 1038 1039 hlist_for_each_entry_from(tmp, e, next) { 1040 if (--*l < 0) 1041 break; 1042 } 1043 state->node = e; 1044 1045 return (*l < 0) ? state : NULL; 1046 } 1047 1048 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1049 struct lec_priv *priv) 1050 { 1051 void *v = NULL; 1052 int p; 1053 1054 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1055 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1056 if (v) 1057 break; 1058 } 1059 state->arp_table = p; 1060 return v; 1061 } 1062 1063 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1064 struct lec_priv *priv) 1065 { 1066 struct hlist_head *lec_misc_tables[] = { 1067 &priv->lec_arp_empty_ones, 1068 &priv->lec_no_forward, 1069 &priv->mcast_fwds 1070 }; 1071 void *v = NULL; 1072 int q; 1073 1074 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1075 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1076 if (v) 1077 break; 1078 } 1079 state->misc_table = q; 1080 return v; 1081 } 1082 1083 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1084 struct lec_priv *priv) 1085 { 1086 if (!state->locked) { 1087 state->locked = priv; 1088 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1089 } 1090 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1091 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1092 state->locked = NULL; 1093 /* Partial state reset for the next time we get called */ 1094 state->arp_table = state->misc_table = 0; 1095 } 1096 return state->locked; 1097 } 1098 1099 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1100 { 1101 struct net_device *dev; 1102 void *v; 1103 1104 dev = state->dev ? state->dev : dev_lec[state->itf]; 1105 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; 1106 if (!v && dev) { 1107 dev_put(dev); 1108 /* Partial state reset for the next time we get called */ 1109 dev = NULL; 1110 } 1111 state->dev = dev; 1112 return v; 1113 } 1114 1115 static void *lec_get_idx(struct lec_state *state, loff_t l) 1116 { 1117 void *v = NULL; 1118 1119 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1120 v = lec_itf_walk(state, &l); 1121 if (v) 1122 break; 1123 } 1124 return v; 1125 } 1126 1127 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1128 { 1129 struct lec_state *state = seq->private; 1130 1131 state->itf = 0; 1132 state->dev = NULL; 1133 state->locked = NULL; 1134 state->arp_table = 0; 1135 state->misc_table = 0; 1136 state->node = (void *)1; 1137 1138 return *pos ? lec_get_idx(state, *pos) : (void *)1; 1139 } 1140 1141 static void lec_seq_stop(struct seq_file *seq, void *v) 1142 { 1143 struct lec_state *state = seq->private; 1144 1145 if (state->dev) { 1146 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1147 state->flags); 1148 dev_put(state->dev); 1149 } 1150 } 1151 1152 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1153 { 1154 struct lec_state *state = seq->private; 1155 1156 v = lec_get_idx(state, 1); 1157 *pos += !!PTR_ERR(v); 1158 return v; 1159 } 1160 1161 static int lec_seq_show(struct seq_file *seq, void *v) 1162 { 1163 static char lec_banner[] = "Itf MAC ATM destination" 1164 " Status Flags " 1165 "VPI/VCI Recv VPI/VCI\n"; 1166 1167 if (v == (void *)1) 1168 seq_puts(seq, lec_banner); 1169 else { 1170 struct lec_state *state = seq->private; 1171 struct net_device *dev = state->dev; 1172 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1173 1174 seq_printf(seq, "%s ", dev->name); 1175 lec_info(seq, entry); 1176 } 1177 return 0; 1178 } 1179 1180 static struct seq_operations lec_seq_ops = { 1181 .start = lec_seq_start, 1182 .next = lec_seq_next, 1183 .stop = lec_seq_stop, 1184 .show = lec_seq_show, 1185 }; 1186 1187 static int lec_seq_open(struct inode *inode, struct file *file) 1188 { 1189 struct lec_state *state; 1190 struct seq_file *seq; 1191 int rc = -EAGAIN; 1192 1193 state = kmalloc(sizeof(*state), GFP_KERNEL); 1194 if (!state) { 1195 rc = -ENOMEM; 1196 goto out; 1197 } 1198 1199 rc = seq_open(file, &lec_seq_ops); 1200 if (rc) 1201 goto out_kfree; 1202 seq = file->private_data; 1203 seq->private = state; 1204 out: 1205 return rc; 1206 1207 out_kfree: 1208 kfree(state); 1209 goto out; 1210 } 1211 1212 static int lec_seq_release(struct inode *inode, struct file *file) 1213 { 1214 return seq_release_private(inode, file); 1215 } 1216 1217 static const struct file_operations lec_seq_fops = { 1218 .owner = THIS_MODULE, 1219 .open = lec_seq_open, 1220 .read = seq_read, 1221 .llseek = seq_lseek, 1222 .release = lec_seq_release, 1223 }; 1224 #endif 1225 1226 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1227 { 1228 struct atm_vcc *vcc = ATM_SD(sock); 1229 int err = 0; 1230 1231 switch (cmd) { 1232 case ATMLEC_CTRL: 1233 case ATMLEC_MCAST: 1234 case ATMLEC_DATA: 1235 if (!capable(CAP_NET_ADMIN)) 1236 return -EPERM; 1237 break; 1238 default: 1239 return -ENOIOCTLCMD; 1240 } 1241 1242 switch (cmd) { 1243 case ATMLEC_CTRL: 1244 err = lecd_attach(vcc, (int)arg); 1245 if (err >= 0) 1246 sock->state = SS_CONNECTED; 1247 break; 1248 case ATMLEC_MCAST: 1249 err = lec_mcast_attach(vcc, (int)arg); 1250 break; 1251 case ATMLEC_DATA: 1252 err = lec_vcc_attach(vcc, (void __user *)arg); 1253 break; 1254 } 1255 1256 return err; 1257 } 1258 1259 static struct atm_ioctl lane_ioctl_ops = { 1260 .owner = THIS_MODULE, 1261 .ioctl = lane_ioctl, 1262 }; 1263 1264 static int __init lane_module_init(void) 1265 { 1266 #ifdef CONFIG_PROC_FS 1267 struct proc_dir_entry *p; 1268 1269 p = create_proc_entry("lec", S_IRUGO, atm_proc_root); 1270 if (p) 1271 p->proc_fops = &lec_seq_fops; 1272 #endif 1273 1274 register_atm_ioctl(&lane_ioctl_ops); 1275 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1276 return 0; 1277 } 1278 1279 static void __exit lane_module_cleanup(void) 1280 { 1281 int i; 1282 struct lec_priv *priv; 1283 1284 remove_proc_entry("lec", atm_proc_root); 1285 1286 deregister_atm_ioctl(&lane_ioctl_ops); 1287 1288 for (i = 0; i < MAX_LEC_ITF; i++) { 1289 if (dev_lec[i] != NULL) { 1290 priv = (struct lec_priv *)dev_lec[i]->priv; 1291 unregister_netdev(dev_lec[i]); 1292 free_netdev(dev_lec[i]); 1293 dev_lec[i] = NULL; 1294 } 1295 } 1296 1297 return; 1298 } 1299 1300 module_init(lane_module_init); 1301 module_exit(lane_module_cleanup); 1302 1303 /* 1304 * LANE2: 3.1.3, LE_RESOLVE.request 1305 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1306 * If sizeoftlvs == NULL the default TLVs associated with with this 1307 * lec will be used. 1308 * If dst_mac == NULL, targetless LE_ARP will be sent 1309 */ 1310 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 1311 u8 **tlvs, u32 *sizeoftlvs) 1312 { 1313 unsigned long flags; 1314 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1315 struct lec_arp_table *table; 1316 struct sk_buff *skb; 1317 int retval; 1318 1319 if (force == 0) { 1320 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1321 table = lec_arp_find(priv, dst_mac); 1322 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1323 if (table == NULL) 1324 return -1; 1325 1326 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1327 if (*tlvs == NULL) 1328 return -1; 1329 1330 *sizeoftlvs = table->sizeoftlvs; 1331 1332 return 0; 1333 } 1334 1335 if (sizeoftlvs == NULL) 1336 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1337 1338 else { 1339 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1340 if (skb == NULL) 1341 return -1; 1342 skb->len = *sizeoftlvs; 1343 memcpy(skb->data, *tlvs, *sizeoftlvs); 1344 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1345 } 1346 return retval; 1347 } 1348 1349 /* 1350 * LANE2: 3.1.4, LE_ASSOCIATE.request 1351 * Associate the *tlvs with the *lan_dst address. 1352 * Will overwrite any previous association 1353 * Returns 1 for success, 0 for failure (out of memory) 1354 * 1355 */ 1356 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 1357 u8 *tlvs, u32 sizeoftlvs) 1358 { 1359 int retval; 1360 struct sk_buff *skb; 1361 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1362 1363 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1364 return (0); /* not our mac address */ 1365 1366 kfree(priv->tlvs); /* NULL if there was no previous association */ 1367 1368 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1369 if (priv->tlvs == NULL) 1370 return (0); 1371 priv->sizeoftlvs = sizeoftlvs; 1372 1373 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1374 if (skb == NULL) 1375 return 0; 1376 skb->len = sizeoftlvs; 1377 memcpy(skb->data, tlvs, sizeoftlvs); 1378 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1379 if (retval != 0) 1380 printk("lec.c: lane2_associate_req() failed\n"); 1381 /* 1382 * If the previous association has changed we must 1383 * somehow notify other LANE entities about the change 1384 */ 1385 return (1); 1386 } 1387 1388 /* 1389 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1390 * 1391 */ 1392 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr, 1393 u8 *tlvs, u32 sizeoftlvs) 1394 { 1395 #if 0 1396 int i = 0; 1397 #endif 1398 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1399 #if 0 /* 1400 * Why have the TLVs in LE_ARP entries 1401 * since we do not use them? When you 1402 * uncomment this code, make sure the 1403 * TLVs get freed when entry is killed 1404 */ 1405 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1406 1407 if (entry == NULL) 1408 return; /* should not happen */ 1409 1410 kfree(entry->tlvs); 1411 1412 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1413 if (entry->tlvs == NULL) 1414 return; 1415 entry->sizeoftlvs = sizeoftlvs; 1416 #endif 1417 #if 0 1418 printk("lec.c: lane2_associate_ind()\n"); 1419 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1420 while (i < sizeoftlvs) 1421 printk("%02x ", tlvs[i++]); 1422 1423 printk("\n"); 1424 #endif 1425 1426 /* tell MPOA about the TLVs we saw */ 1427 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1428 priv->lane2_ops->associate_indicator(dev, mac_addr, 1429 tlvs, sizeoftlvs); 1430 } 1431 return; 1432 } 1433 1434 /* 1435 * Here starts what used to lec_arpc.c 1436 * 1437 * lec_arpc.c was added here when making 1438 * lane client modular. October 1997 1439 */ 1440 1441 #include <linux/types.h> 1442 #include <linux/timer.h> 1443 #include <asm/param.h> 1444 #include <asm/atomic.h> 1445 #include <linux/inetdevice.h> 1446 #include <net/route.h> 1447 1448 #if 0 1449 #define DPRINTK(format,args...) 1450 /* 1451 #define DPRINTK printk 1452 */ 1453 #endif 1454 #define DEBUG_ARP_TABLE 0 1455 1456 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1457 1458 static void lec_arp_check_expire(struct work_struct *work); 1459 static void lec_arp_expire_arp(unsigned long data); 1460 1461 /* 1462 * Arp table funcs 1463 */ 1464 1465 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1466 1467 /* 1468 * Initialization of arp-cache 1469 */ 1470 static void lec_arp_init(struct lec_priv *priv) 1471 { 1472 unsigned short i; 1473 1474 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1475 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1476 } 1477 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1478 INIT_HLIST_HEAD(&priv->lec_no_forward); 1479 INIT_HLIST_HEAD(&priv->mcast_fwds); 1480 spin_lock_init(&priv->lec_arp_lock); 1481 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1482 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1483 } 1484 1485 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1486 { 1487 if (entry->vcc) { 1488 struct atm_vcc *vcc = entry->vcc; 1489 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1490 struct net_device *dev = (struct net_device *)vcc->proto_data; 1491 1492 vcc->pop = vpriv->old_pop; 1493 if (vpriv->xoff) 1494 netif_wake_queue(dev); 1495 kfree(vpriv); 1496 vcc->user_back = NULL; 1497 vcc->push = entry->old_push; 1498 vcc_release_async(vcc, -EPIPE); 1499 entry->vcc = NULL; 1500 } 1501 if (entry->recv_vcc) { 1502 entry->recv_vcc->push = entry->old_recv_push; 1503 vcc_release_async(entry->recv_vcc, -EPIPE); 1504 entry->recv_vcc = NULL; 1505 } 1506 } 1507 1508 /* 1509 * Insert entry to lec_arp_table 1510 * LANE2: Add to the end of the list to satisfy 8.1.13 1511 */ 1512 static inline void 1513 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1514 { 1515 struct hlist_head *tmp; 1516 1517 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1518 hlist_add_head(&entry->next, tmp); 1519 1520 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1521 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1522 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1523 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1524 } 1525 1526 /* 1527 * Remove entry from lec_arp_table 1528 */ 1529 static int 1530 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1531 { 1532 struct hlist_node *node; 1533 struct lec_arp_table *entry; 1534 int i, remove_vcc = 1; 1535 1536 if (!to_remove) { 1537 return -1; 1538 } 1539 1540 hlist_del(&to_remove->next); 1541 del_timer(&to_remove->timer); 1542 1543 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1544 if (to_remove->status >= ESI_FLUSH_PENDING) { 1545 /* 1546 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1547 */ 1548 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1549 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1550 if (memcmp(to_remove->atm_addr, 1551 entry->atm_addr, ATM_ESA_LEN) == 0) { 1552 remove_vcc = 0; 1553 break; 1554 } 1555 } 1556 } 1557 if (remove_vcc) 1558 lec_arp_clear_vccs(to_remove); 1559 } 1560 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1561 1562 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1563 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1564 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1565 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1566 return 0; 1567 } 1568 1569 #if DEBUG_ARP_TABLE 1570 static char *get_status_string(unsigned char st) 1571 { 1572 switch (st) { 1573 case ESI_UNKNOWN: 1574 return "ESI_UNKNOWN"; 1575 case ESI_ARP_PENDING: 1576 return "ESI_ARP_PENDING"; 1577 case ESI_VC_PENDING: 1578 return "ESI_VC_PENDING"; 1579 case ESI_FLUSH_PENDING: 1580 return "ESI_FLUSH_PENDING"; 1581 case ESI_FORWARD_DIRECT: 1582 return "ESI_FORWARD_DIRECT"; 1583 default: 1584 return "<UNKNOWN>"; 1585 } 1586 } 1587 1588 static void dump_arp_table(struct lec_priv *priv) 1589 { 1590 struct hlist_node *node; 1591 struct lec_arp_table *rulla; 1592 char buf[256]; 1593 int i, j, offset; 1594 1595 printk("Dump %p:\n", priv); 1596 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1597 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1598 offset = 0; 1599 offset += sprintf(buf, "%d: %p\n", i, rulla); 1600 offset += sprintf(buf + offset, "Mac:"); 1601 for (j = 0; j < ETH_ALEN; j++) { 1602 offset += sprintf(buf + offset, 1603 "%2.2x ", 1604 rulla->mac_addr[j] & 0xff); 1605 } 1606 offset += sprintf(buf + offset, "Atm:"); 1607 for (j = 0; j < ATM_ESA_LEN; j++) { 1608 offset += sprintf(buf + offset, 1609 "%2.2x ", 1610 rulla->atm_addr[j] & 0xff); 1611 } 1612 offset += sprintf(buf + offset, 1613 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1614 rulla->vcc ? rulla->vcc->vpi : 0, 1615 rulla->vcc ? rulla->vcc->vci : 0, 1616 rulla->recv_vcc ? rulla->recv_vcc-> 1617 vpi : 0, 1618 rulla->recv_vcc ? rulla->recv_vcc-> 1619 vci : 0, rulla->last_used, 1620 rulla->timestamp, rulla->no_tries); 1621 offset += 1622 sprintf(buf + offset, 1623 "Flags:%x, Packets_flooded:%x, Status: %s ", 1624 rulla->flags, rulla->packets_flooded, 1625 get_status_string(rulla->status)); 1626 printk("%s\n", buf); 1627 } 1628 } 1629 1630 if (!hlist_empty(&priv->lec_no_forward)) 1631 printk("No forward\n"); 1632 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1633 offset = 0; 1634 offset += sprintf(buf + offset, "Mac:"); 1635 for (j = 0; j < ETH_ALEN; j++) { 1636 offset += sprintf(buf + offset, "%2.2x ", 1637 rulla->mac_addr[j] & 0xff); 1638 } 1639 offset += sprintf(buf + offset, "Atm:"); 1640 for (j = 0; j < ATM_ESA_LEN; j++) { 1641 offset += sprintf(buf + offset, "%2.2x ", 1642 rulla->atm_addr[j] & 0xff); 1643 } 1644 offset += sprintf(buf + offset, 1645 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1646 rulla->vcc ? rulla->vcc->vpi : 0, 1647 rulla->vcc ? rulla->vcc->vci : 0, 1648 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1649 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1650 rulla->last_used, 1651 rulla->timestamp, rulla->no_tries); 1652 offset += sprintf(buf + offset, 1653 "Flags:%x, Packets_flooded:%x, Status: %s ", 1654 rulla->flags, rulla->packets_flooded, 1655 get_status_string(rulla->status)); 1656 printk("%s\n", buf); 1657 } 1658 1659 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1660 printk("Empty ones\n"); 1661 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { 1662 offset = 0; 1663 offset += sprintf(buf + offset, "Mac:"); 1664 for (j = 0; j < ETH_ALEN; j++) { 1665 offset += sprintf(buf + offset, "%2.2x ", 1666 rulla->mac_addr[j] & 0xff); 1667 } 1668 offset += sprintf(buf + offset, "Atm:"); 1669 for (j = 0; j < ATM_ESA_LEN; j++) { 1670 offset += sprintf(buf + offset, "%2.2x ", 1671 rulla->atm_addr[j] & 0xff); 1672 } 1673 offset += sprintf(buf + offset, 1674 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1675 rulla->vcc ? rulla->vcc->vpi : 0, 1676 rulla->vcc ? rulla->vcc->vci : 0, 1677 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1678 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1679 rulla->last_used, 1680 rulla->timestamp, rulla->no_tries); 1681 offset += sprintf(buf + offset, 1682 "Flags:%x, Packets_flooded:%x, Status: %s ", 1683 rulla->flags, rulla->packets_flooded, 1684 get_status_string(rulla->status)); 1685 printk("%s", buf); 1686 } 1687 1688 if (!hlist_empty(&priv->mcast_fwds)) 1689 printk("Multicast Forward VCCs\n"); 1690 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { 1691 offset = 0; 1692 offset += sprintf(buf + offset, "Mac:"); 1693 for (j = 0; j < ETH_ALEN; j++) { 1694 offset += sprintf(buf + offset, "%2.2x ", 1695 rulla->mac_addr[j] & 0xff); 1696 } 1697 offset += sprintf(buf + offset, "Atm:"); 1698 for (j = 0; j < ATM_ESA_LEN; j++) { 1699 offset += sprintf(buf + offset, "%2.2x ", 1700 rulla->atm_addr[j] & 0xff); 1701 } 1702 offset += sprintf(buf + offset, 1703 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1704 rulla->vcc ? rulla->vcc->vpi : 0, 1705 rulla->vcc ? rulla->vcc->vci : 0, 1706 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1707 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1708 rulla->last_used, 1709 rulla->timestamp, rulla->no_tries); 1710 offset += sprintf(buf + offset, 1711 "Flags:%x, Packets_flooded:%x, Status: %s ", 1712 rulla->flags, rulla->packets_flooded, 1713 get_status_string(rulla->status)); 1714 printk("%s\n", buf); 1715 } 1716 1717 } 1718 #else 1719 #define dump_arp_table(priv) do { } while (0) 1720 #endif 1721 1722 /* 1723 * Destruction of arp-cache 1724 */ 1725 static void lec_arp_destroy(struct lec_priv *priv) 1726 { 1727 unsigned long flags; 1728 struct hlist_node *node, *next; 1729 struct lec_arp_table *entry; 1730 int i; 1731 1732 cancel_rearming_delayed_work(&priv->lec_arp_work); 1733 1734 /* 1735 * Remove all entries 1736 */ 1737 1738 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1739 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1740 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1741 lec_arp_remove(priv, entry); 1742 lec_arp_put(entry); 1743 } 1744 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1745 } 1746 1747 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 1748 del_timer_sync(&entry->timer); 1749 lec_arp_clear_vccs(entry); 1750 hlist_del(&entry->next); 1751 lec_arp_put(entry); 1752 } 1753 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1754 1755 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1756 del_timer_sync(&entry->timer); 1757 lec_arp_clear_vccs(entry); 1758 hlist_del(&entry->next); 1759 lec_arp_put(entry); 1760 } 1761 INIT_HLIST_HEAD(&priv->lec_no_forward); 1762 1763 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1764 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1765 lec_arp_clear_vccs(entry); 1766 hlist_del(&entry->next); 1767 lec_arp_put(entry); 1768 } 1769 INIT_HLIST_HEAD(&priv->mcast_fwds); 1770 priv->mcast_vcc = NULL; 1771 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1772 } 1773 1774 /* 1775 * Find entry by mac_address 1776 */ 1777 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1778 unsigned char *mac_addr) 1779 { 1780 struct hlist_node *node; 1781 struct hlist_head *head; 1782 struct lec_arp_table *entry; 1783 1784 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1785 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1786 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1787 1788 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1789 hlist_for_each_entry(entry, node, head, next) { 1790 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1791 return entry; 1792 } 1793 } 1794 return NULL; 1795 } 1796 1797 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1798 unsigned char *mac_addr) 1799 { 1800 struct lec_arp_table *to_return; 1801 1802 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1803 if (!to_return) { 1804 printk("LEC: Arp entry kmalloc failed\n"); 1805 return NULL; 1806 } 1807 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1808 INIT_HLIST_NODE(&to_return->next); 1809 init_timer(&to_return->timer); 1810 to_return->timer.function = lec_arp_expire_arp; 1811 to_return->timer.data = (unsigned long)to_return; 1812 to_return->last_used = jiffies; 1813 to_return->priv = priv; 1814 skb_queue_head_init(&to_return->tx_wait); 1815 atomic_set(&to_return->usage, 1); 1816 return to_return; 1817 } 1818 1819 /* Arp sent timer expired */ 1820 static void lec_arp_expire_arp(unsigned long data) 1821 { 1822 struct lec_arp_table *entry; 1823 1824 entry = (struct lec_arp_table *)data; 1825 1826 DPRINTK("lec_arp_expire_arp\n"); 1827 if (entry->status == ESI_ARP_PENDING) { 1828 if (entry->no_tries <= entry->priv->max_retry_count) { 1829 if (entry->is_rdesc) 1830 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1831 entry->mac_addr, NULL, NULL); 1832 else 1833 send_to_lecd(entry->priv, l_arp_xmt, 1834 entry->mac_addr, NULL, NULL); 1835 entry->no_tries++; 1836 } 1837 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1838 } 1839 } 1840 1841 /* Unknown/unused vcc expire, remove associated entry */ 1842 static void lec_arp_expire_vcc(unsigned long data) 1843 { 1844 unsigned long flags; 1845 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1846 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1847 1848 del_timer(&to_remove->timer); 1849 1850 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1851 to_remove, priv, 1852 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1853 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1854 1855 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1856 hlist_del(&to_remove->next); 1857 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1858 1859 lec_arp_clear_vccs(to_remove); 1860 lec_arp_put(to_remove); 1861 } 1862 1863 /* 1864 * Expire entries. 1865 * 1. Re-set timer 1866 * 2. For each entry, delete entries that have aged past the age limit. 1867 * 3. For each entry, depending on the status of the entry, perform 1868 * the following maintenance. 1869 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1870 * tick_count is above the max_unknown_frame_time, clear 1871 * the tick_count to zero and clear the packets_flooded counter 1872 * to zero. This supports the packet rate limit per address 1873 * while flooding unknowns. 1874 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1875 * than or equal to the path_switching_delay, change the status 1876 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1877 * regardless of the progress of the flush protocol. 1878 */ 1879 static void lec_arp_check_expire(struct work_struct *work) 1880 { 1881 unsigned long flags; 1882 struct lec_priv *priv = 1883 container_of(work, struct lec_priv, lec_arp_work.work); 1884 struct hlist_node *node, *next; 1885 struct lec_arp_table *entry; 1886 unsigned long now; 1887 unsigned long time_to_check; 1888 int i; 1889 1890 DPRINTK("lec_arp_check_expire %p\n", priv); 1891 now = jiffies; 1892 restart: 1893 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1894 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1895 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1896 if ((entry->flags) & LEC_REMOTE_FLAG && 1897 priv->topology_change) 1898 time_to_check = priv->forward_delay_time; 1899 else 1900 time_to_check = priv->aging_time; 1901 1902 DPRINTK("About to expire: %lx - %lx > %lx\n", 1903 now, entry->last_used, time_to_check); 1904 if (time_after(now, entry->last_used + time_to_check) 1905 && !(entry->flags & LEC_PERMANENT_FLAG) 1906 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1907 /* Remove entry */ 1908 DPRINTK("LEC:Entry timed out\n"); 1909 lec_arp_remove(priv, entry); 1910 lec_arp_put(entry); 1911 } else { 1912 /* Something else */ 1913 if ((entry->status == ESI_VC_PENDING || 1914 entry->status == ESI_ARP_PENDING) 1915 && time_after_eq(now, 1916 entry->timestamp + 1917 priv-> 1918 max_unknown_frame_time)) { 1919 entry->timestamp = jiffies; 1920 entry->packets_flooded = 0; 1921 if (entry->status == ESI_VC_PENDING) 1922 send_to_lecd(priv, l_svc_setup, 1923 entry->mac_addr, 1924 entry->atm_addr, 1925 NULL); 1926 } 1927 if (entry->status == ESI_FLUSH_PENDING 1928 && 1929 time_after_eq(now, entry->timestamp + 1930 priv->path_switching_delay)) { 1931 struct sk_buff *skb; 1932 struct atm_vcc *vcc = entry->vcc; 1933 1934 lec_arp_hold(entry); 1935 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1936 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1937 lec_send(vcc, skb, entry->priv); 1938 entry->last_used = jiffies; 1939 entry->status = ESI_FORWARD_DIRECT; 1940 lec_arp_put(entry); 1941 goto restart; 1942 } 1943 } 1944 } 1945 } 1946 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1947 1948 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1949 } 1950 1951 /* 1952 * Try to find vcc where mac_address is attached. 1953 * 1954 */ 1955 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1956 unsigned char *mac_to_find, int is_rdesc, 1957 struct lec_arp_table **ret_entry) 1958 { 1959 unsigned long flags; 1960 struct lec_arp_table *entry; 1961 struct atm_vcc *found; 1962 1963 if (mac_to_find[0] & 0x01) { 1964 switch (priv->lane_version) { 1965 case 1: 1966 return priv->mcast_vcc; 1967 break; 1968 case 2: /* LANE2 wants arp for multicast addresses */ 1969 if (!compare_ether_addr(mac_to_find, bus_mac)) 1970 return priv->mcast_vcc; 1971 break; 1972 default: 1973 break; 1974 } 1975 } 1976 1977 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1978 entry = lec_arp_find(priv, mac_to_find); 1979 1980 if (entry) { 1981 if (entry->status == ESI_FORWARD_DIRECT) { 1982 /* Connection Ok */ 1983 entry->last_used = jiffies; 1984 lec_arp_hold(entry); 1985 *ret_entry = entry; 1986 found = entry->vcc; 1987 goto out; 1988 } 1989 /* 1990 * If the LE_ARP cache entry is still pending, reset count to 0 1991 * so another LE_ARP request can be made for this frame. 1992 */ 1993 if (entry->status == ESI_ARP_PENDING) { 1994 entry->no_tries = 0; 1995 } 1996 /* 1997 * Data direct VC not yet set up, check to see if the unknown 1998 * frame count is greater than the limit. If the limit has 1999 * not been reached, allow the caller to send packet to 2000 * BUS. 2001 */ 2002 if (entry->status != ESI_FLUSH_PENDING && 2003 entry->packets_flooded < 2004 priv->maximum_unknown_frame_count) { 2005 entry->packets_flooded++; 2006 DPRINTK("LEC_ARP: Flooding..\n"); 2007 found = priv->mcast_vcc; 2008 goto out; 2009 } 2010 /* 2011 * We got here because entry->status == ESI_FLUSH_PENDING 2012 * or BUS flood limit was reached for an entry which is 2013 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 2014 */ 2015 lec_arp_hold(entry); 2016 *ret_entry = entry; 2017 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, 2018 entry->vcc); 2019 found = NULL; 2020 } else { 2021 /* No matching entry was found */ 2022 entry = make_entry(priv, mac_to_find); 2023 DPRINTK("LEC_ARP: Making entry\n"); 2024 if (!entry) { 2025 found = priv->mcast_vcc; 2026 goto out; 2027 } 2028 lec_arp_add(priv, entry); 2029 /* We want arp-request(s) to be sent */ 2030 entry->packets_flooded = 1; 2031 entry->status = ESI_ARP_PENDING; 2032 entry->no_tries = 1; 2033 entry->last_used = entry->timestamp = jiffies; 2034 entry->is_rdesc = is_rdesc; 2035 if (entry->is_rdesc) 2036 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 2037 NULL); 2038 else 2039 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 2040 entry->timer.expires = jiffies + (1 * HZ); 2041 entry->timer.function = lec_arp_expire_arp; 2042 add_timer(&entry->timer); 2043 found = priv->mcast_vcc; 2044 } 2045 2046 out: 2047 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2048 return found; 2049 } 2050 2051 static int 2052 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 2053 unsigned long permanent) 2054 { 2055 unsigned long flags; 2056 struct hlist_node *node, *next; 2057 struct lec_arp_table *entry; 2058 int i; 2059 2060 DPRINTK("lec_addr_delete\n"); 2061 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2062 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2063 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2064 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2065 && (permanent || 2066 !(entry->flags & LEC_PERMANENT_FLAG))) { 2067 lec_arp_remove(priv, entry); 2068 lec_arp_put(entry); 2069 } 2070 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2071 return 0; 2072 } 2073 } 2074 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2075 return -1; 2076 } 2077 2078 /* 2079 * Notifies: Response to arp_request (atm_addr != NULL) 2080 */ 2081 static void 2082 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 2083 unsigned char *atm_addr, unsigned long remoteflag, 2084 unsigned int targetless_le_arp) 2085 { 2086 unsigned long flags; 2087 struct hlist_node *node, *next; 2088 struct lec_arp_table *entry, *tmp; 2089 int i; 2090 2091 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2092 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2093 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2094 mac_addr[4], mac_addr[5]); 2095 2096 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2097 entry = lec_arp_find(priv, mac_addr); 2098 if (entry == NULL && targetless_le_arp) 2099 goto out; /* 2100 * LANE2: ignore targetless LE_ARPs for which 2101 * we have no entry in the cache. 7.1.30 2102 */ 2103 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2104 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2105 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2106 hlist_del(&entry->next); 2107 del_timer(&entry->timer); 2108 tmp = lec_arp_find(priv, mac_addr); 2109 if (tmp) { 2110 del_timer(&tmp->timer); 2111 tmp->status = ESI_FORWARD_DIRECT; 2112 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2113 tmp->vcc = entry->vcc; 2114 tmp->old_push = entry->old_push; 2115 tmp->last_used = jiffies; 2116 del_timer(&entry->timer); 2117 lec_arp_put(entry); 2118 entry = tmp; 2119 } else { 2120 entry->status = ESI_FORWARD_DIRECT; 2121 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2122 entry->last_used = jiffies; 2123 lec_arp_add(priv, entry); 2124 } 2125 if (remoteflag) 2126 entry->flags |= LEC_REMOTE_FLAG; 2127 else 2128 entry->flags &= ~LEC_REMOTE_FLAG; 2129 DPRINTK("After update\n"); 2130 dump_arp_table(priv); 2131 goto out; 2132 } 2133 } 2134 } 2135 2136 entry = lec_arp_find(priv, mac_addr); 2137 if (!entry) { 2138 entry = make_entry(priv, mac_addr); 2139 if (!entry) 2140 goto out; 2141 entry->status = ESI_UNKNOWN; 2142 lec_arp_add(priv, entry); 2143 /* Temporary, changes before end of function */ 2144 } 2145 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2146 del_timer(&entry->timer); 2147 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2148 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2149 if (entry != tmp && 2150 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2151 /* Vcc to this host exists */ 2152 if (tmp->status > ESI_VC_PENDING) { 2153 /* 2154 * ESI_FLUSH_PENDING, 2155 * ESI_FORWARD_DIRECT 2156 */ 2157 entry->vcc = tmp->vcc; 2158 entry->old_push = tmp->old_push; 2159 } 2160 entry->status = tmp->status; 2161 break; 2162 } 2163 } 2164 } 2165 if (remoteflag) 2166 entry->flags |= LEC_REMOTE_FLAG; 2167 else 2168 entry->flags &= ~LEC_REMOTE_FLAG; 2169 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2170 entry->status = ESI_VC_PENDING; 2171 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2172 } 2173 DPRINTK("After update2\n"); 2174 dump_arp_table(priv); 2175 out: 2176 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2177 } 2178 2179 /* 2180 * Notifies: Vcc setup ready 2181 */ 2182 static void 2183 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 2184 struct atm_vcc *vcc, 2185 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2186 { 2187 unsigned long flags; 2188 struct hlist_node *node; 2189 struct lec_arp_table *entry; 2190 int i, found_entry = 0; 2191 2192 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2193 if (ioc_data->receive == 2) { 2194 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2195 2196 DPRINTK("LEC_ARP: Attaching mcast forward\n"); 2197 #if 0 2198 entry = lec_arp_find(priv, bus_mac); 2199 if (!entry) { 2200 printk("LEC_ARP: Multicast entry not found!\n"); 2201 goto out; 2202 } 2203 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2204 entry->recv_vcc = vcc; 2205 entry->old_recv_push = old_push; 2206 #endif 2207 entry = make_entry(priv, bus_mac); 2208 if (entry == NULL) 2209 goto out; 2210 del_timer(&entry->timer); 2211 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2212 entry->recv_vcc = vcc; 2213 entry->old_recv_push = old_push; 2214 hlist_add_head(&entry->next, &priv->mcast_fwds); 2215 goto out; 2216 } else if (ioc_data->receive == 1) { 2217 /* 2218 * Vcc which we don't want to make default vcc, 2219 * attach it anyway. 2220 */ 2221 DPRINTK 2222 ("LEC_ARP:Attaching data direct, not default: " 2223 "%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", 2224 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2225 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2226 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2227 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2228 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2229 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2230 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2231 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2232 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2233 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2234 entry = make_entry(priv, bus_mac); 2235 if (entry == NULL) 2236 goto out; 2237 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2238 memset(entry->mac_addr, 0, ETH_ALEN); 2239 entry->recv_vcc = vcc; 2240 entry->old_recv_push = old_push; 2241 entry->status = ESI_UNKNOWN; 2242 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2243 entry->timer.function = lec_arp_expire_vcc; 2244 hlist_add_head(&entry->next, &priv->lec_no_forward); 2245 add_timer(&entry->timer); 2246 dump_arp_table(priv); 2247 goto out; 2248 } 2249 DPRINTK 2250 ("LEC_ARP:Attaching data direct, default: " 2251 "%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", 2252 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2253 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2254 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2255 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2256 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2257 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2258 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2259 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2260 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2261 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2262 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2263 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2264 if (memcmp 2265 (ioc_data->atm_addr, entry->atm_addr, 2266 ATM_ESA_LEN) == 0) { 2267 DPRINTK("LEC_ARP: Attaching data direct\n"); 2268 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", 2269 entry->vcc ? entry->vcc->vci : 0, 2270 entry->recv_vcc ? entry->recv_vcc-> 2271 vci : 0); 2272 found_entry = 1; 2273 del_timer(&entry->timer); 2274 entry->vcc = vcc; 2275 entry->old_push = old_push; 2276 if (entry->status == ESI_VC_PENDING) { 2277 if (priv->maximum_unknown_frame_count 2278 == 0) 2279 entry->status = 2280 ESI_FORWARD_DIRECT; 2281 else { 2282 entry->timestamp = jiffies; 2283 entry->status = 2284 ESI_FLUSH_PENDING; 2285 #if 0 2286 send_to_lecd(priv, l_flush_xmt, 2287 NULL, 2288 entry->atm_addr, 2289 NULL); 2290 #endif 2291 } 2292 } else { 2293 /* 2294 * They were forming a connection 2295 * to us, and we to them. Our 2296 * ATM address is numerically lower 2297 * than theirs, so we make connection 2298 * we formed into default VCC (8.1.11). 2299 * Connection they made gets torn 2300 * down. This might confuse some 2301 * clients. Can be changed if 2302 * someone reports trouble... 2303 */ 2304 ; 2305 } 2306 } 2307 } 2308 } 2309 if (found_entry) { 2310 DPRINTK("After vcc was added\n"); 2311 dump_arp_table(priv); 2312 goto out; 2313 } 2314 /* 2315 * Not found, snatch address from first data packet that arrives 2316 * from this vcc 2317 */ 2318 entry = make_entry(priv, bus_mac); 2319 if (!entry) 2320 goto out; 2321 entry->vcc = vcc; 2322 entry->old_push = old_push; 2323 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2324 memset(entry->mac_addr, 0, ETH_ALEN); 2325 entry->status = ESI_UNKNOWN; 2326 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2327 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2328 entry->timer.function = lec_arp_expire_vcc; 2329 add_timer(&entry->timer); 2330 DPRINTK("After vcc was added\n"); 2331 dump_arp_table(priv); 2332 out: 2333 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2334 } 2335 2336 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2337 { 2338 unsigned long flags; 2339 struct hlist_node *node; 2340 struct lec_arp_table *entry; 2341 int i; 2342 2343 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id); 2344 restart: 2345 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2346 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2347 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2348 if (entry->flush_tran_id == tran_id 2349 && entry->status == ESI_FLUSH_PENDING) { 2350 struct sk_buff *skb; 2351 struct atm_vcc *vcc = entry->vcc; 2352 2353 lec_arp_hold(entry); 2354 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2355 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2356 lec_send(vcc, skb, entry->priv); 2357 entry->last_used = jiffies; 2358 entry->status = ESI_FORWARD_DIRECT; 2359 lec_arp_put(entry); 2360 DPRINTK("LEC_ARP: Flushed\n"); 2361 goto restart; 2362 } 2363 } 2364 } 2365 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2366 dump_arp_table(priv); 2367 } 2368 2369 static void 2370 lec_set_flush_tran_id(struct lec_priv *priv, 2371 unsigned char *atm_addr, unsigned long tran_id) 2372 { 2373 unsigned long flags; 2374 struct hlist_node *node; 2375 struct lec_arp_table *entry; 2376 int i; 2377 2378 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2379 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2380 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2381 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2382 entry->flush_tran_id = tran_id; 2383 DPRINTK("Set flush transaction id to %lx for %p\n", 2384 tran_id, entry); 2385 } 2386 } 2387 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2388 } 2389 2390 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2391 { 2392 unsigned long flags; 2393 unsigned char mac_addr[] = { 2394 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2395 }; 2396 struct lec_arp_table *to_add; 2397 struct lec_vcc_priv *vpriv; 2398 int err = 0; 2399 2400 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2401 return -ENOMEM; 2402 vpriv->xoff = 0; 2403 vpriv->old_pop = vcc->pop; 2404 vcc->user_back = vpriv; 2405 vcc->pop = lec_pop; 2406 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2407 to_add = make_entry(priv, mac_addr); 2408 if (!to_add) { 2409 vcc->pop = vpriv->old_pop; 2410 kfree(vpriv); 2411 err = -ENOMEM; 2412 goto out; 2413 } 2414 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2415 to_add->status = ESI_FORWARD_DIRECT; 2416 to_add->flags |= LEC_PERMANENT_FLAG; 2417 to_add->vcc = vcc; 2418 to_add->old_push = vcc->push; 2419 vcc->push = lec_push; 2420 priv->mcast_vcc = vcc; 2421 lec_arp_add(priv, to_add); 2422 out: 2423 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2424 return err; 2425 } 2426 2427 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2428 { 2429 unsigned long flags; 2430 struct hlist_node *node, *next; 2431 struct lec_arp_table *entry; 2432 int i; 2433 2434 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2435 dump_arp_table(priv); 2436 2437 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2438 2439 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2440 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2441 if (vcc == entry->vcc) { 2442 lec_arp_remove(priv, entry); 2443 lec_arp_put(entry); 2444 if (priv->mcast_vcc == vcc) { 2445 priv->mcast_vcc = NULL; 2446 } 2447 } 2448 } 2449 } 2450 2451 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2452 if (entry->vcc == vcc) { 2453 lec_arp_clear_vccs(entry); 2454 del_timer(&entry->timer); 2455 hlist_del(&entry->next); 2456 lec_arp_put(entry); 2457 } 2458 } 2459 2460 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2461 if (entry->recv_vcc == vcc) { 2462 lec_arp_clear_vccs(entry); 2463 del_timer(&entry->timer); 2464 hlist_del(&entry->next); 2465 lec_arp_put(entry); 2466 } 2467 } 2468 2469 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2470 if (entry->recv_vcc == vcc) { 2471 lec_arp_clear_vccs(entry); 2472 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2473 hlist_del(&entry->next); 2474 lec_arp_put(entry); 2475 } 2476 } 2477 2478 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2479 dump_arp_table(priv); 2480 } 2481 2482 static void 2483 lec_arp_check_empties(struct lec_priv *priv, 2484 struct atm_vcc *vcc, struct sk_buff *skb) 2485 { 2486 unsigned long flags; 2487 struct hlist_node *node, *next; 2488 struct lec_arp_table *entry, *tmp; 2489 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2490 unsigned char *src; 2491 #ifdef CONFIG_TR 2492 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2493 2494 if (priv->is_trdev) 2495 src = tr_hdr->h_source; 2496 else 2497 #endif 2498 src = hdr->h_source; 2499 2500 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2501 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2502 if (vcc == entry->vcc) { 2503 del_timer(&entry->timer); 2504 memcpy(entry->mac_addr, src, ETH_ALEN); 2505 entry->status = ESI_FORWARD_DIRECT; 2506 entry->last_used = jiffies; 2507 /* We might have got an entry */ 2508 if ((tmp = lec_arp_find(priv, src))) { 2509 lec_arp_remove(priv, tmp); 2510 lec_arp_put(tmp); 2511 } 2512 hlist_del(&entry->next); 2513 lec_arp_add(priv, entry); 2514 goto out; 2515 } 2516 } 2517 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); 2518 out: 2519 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2520 } 2521 2522 MODULE_LICENSE("GPL"); 2523