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_pointer(skb), 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 skb->protocol = eth_type_trans(skb, dev); 835 priv->stats.rx_packets++; 836 priv->stats.rx_bytes += skb->len; 837 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 838 netif_rx(skb); 839 } 840 } 841 842 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 843 { 844 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 845 struct net_device *dev = skb->dev; 846 847 if (vpriv == NULL) { 848 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 849 return; 850 } 851 852 vpriv->old_pop(vcc, skb); 853 854 if (vpriv->xoff && atm_may_send(vcc, 0)) { 855 vpriv->xoff = 0; 856 if (netif_running(dev) && netif_queue_stopped(dev)) 857 netif_wake_queue(dev); 858 } 859 } 860 861 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 862 { 863 struct lec_vcc_priv *vpriv; 864 int bytes_left; 865 struct atmlec_ioc ioc_data; 866 867 /* Lecd must be up in this case */ 868 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 869 if (bytes_left != 0) { 870 printk 871 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 872 bytes_left); 873 } 874 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 875 !dev_lec[ioc_data.dev_num]) 876 return -EINVAL; 877 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 878 return -ENOMEM; 879 vpriv->xoff = 0; 880 vpriv->old_pop = vcc->pop; 881 vcc->user_back = vpriv; 882 vcc->pop = lec_pop; 883 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, 884 &ioc_data, vcc, vcc->push); 885 vcc->proto_data = dev_lec[ioc_data.dev_num]; 886 vcc->push = lec_push; 887 return 0; 888 } 889 890 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 891 { 892 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 893 return -EINVAL; 894 vcc->proto_data = dev_lec[arg]; 895 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); 896 } 897 898 /* Initialize device. */ 899 static int lecd_attach(struct atm_vcc *vcc, int arg) 900 { 901 int i; 902 struct lec_priv *priv; 903 904 if (arg < 0) 905 i = 0; 906 else 907 i = arg; 908 #ifdef CONFIG_TR 909 if (arg >= MAX_LEC_ITF) 910 return -EINVAL; 911 #else /* Reserve the top NUM_TR_DEVS for TR */ 912 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 913 return -EINVAL; 914 #endif 915 if (!dev_lec[i]) { 916 int is_trdev, size; 917 918 is_trdev = 0; 919 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 920 is_trdev = 1; 921 922 size = sizeof(struct lec_priv); 923 #ifdef CONFIG_TR 924 if (is_trdev) 925 dev_lec[i] = alloc_trdev(size); 926 else 927 #endif 928 dev_lec[i] = alloc_etherdev(size); 929 if (!dev_lec[i]) 930 return -ENOMEM; 931 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 932 if (register_netdev(dev_lec[i])) { 933 free_netdev(dev_lec[i]); 934 return -EINVAL; 935 } 936 937 priv = dev_lec[i]->priv; 938 priv->is_trdev = is_trdev; 939 lec_init(dev_lec[i]); 940 } else { 941 priv = dev_lec[i]->priv; 942 if (priv->lecd) 943 return -EADDRINUSE; 944 } 945 lec_arp_init(priv); 946 priv->itfnum = i; /* LANE2 addition */ 947 priv->lecd = vcc; 948 vcc->dev = &lecatm_dev; 949 vcc_insert_socket(sk_atm(vcc)); 950 951 vcc->proto_data = dev_lec[i]; 952 set_bit(ATM_VF_META, &vcc->flags); 953 set_bit(ATM_VF_READY, &vcc->flags); 954 955 /* Set default values to these variables */ 956 priv->maximum_unknown_frame_count = 1; 957 priv->max_unknown_frame_time = (1 * HZ); 958 priv->vcc_timeout_period = (1200 * HZ); 959 priv->max_retry_count = 1; 960 priv->aging_time = (300 * HZ); 961 priv->forward_delay_time = (15 * HZ); 962 priv->topology_change = 0; 963 priv->arp_response_time = (1 * HZ); 964 priv->flush_timeout = (4 * HZ); 965 priv->path_switching_delay = (6 * HZ); 966 967 if (dev_lec[i]->flags & IFF_UP) { 968 netif_start_queue(dev_lec[i]); 969 } 970 __module_get(THIS_MODULE); 971 return i; 972 } 973 974 #ifdef CONFIG_PROC_FS 975 static char *lec_arp_get_status_string(unsigned char status) 976 { 977 static char *lec_arp_status_string[] = { 978 "ESI_UNKNOWN ", 979 "ESI_ARP_PENDING ", 980 "ESI_VC_PENDING ", 981 "<Undefined> ", 982 "ESI_FLUSH_PENDING ", 983 "ESI_FORWARD_DIRECT" 984 }; 985 986 if (status > ESI_FORWARD_DIRECT) 987 status = 3; /* ESI_UNDEFINED */ 988 return lec_arp_status_string[status]; 989 } 990 991 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 992 { 993 int i; 994 995 for (i = 0; i < ETH_ALEN; i++) 996 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 997 seq_printf(seq, " "); 998 for (i = 0; i < ATM_ESA_LEN; i++) 999 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 1000 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 1001 entry->flags & 0xffff); 1002 if (entry->vcc) 1003 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 1004 else 1005 seq_printf(seq, " "); 1006 if (entry->recv_vcc) { 1007 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 1008 entry->recv_vcc->vci); 1009 } 1010 seq_putc(seq, '\n'); 1011 } 1012 1013 struct lec_state { 1014 unsigned long flags; 1015 struct lec_priv *locked; 1016 struct hlist_node *node; 1017 struct net_device *dev; 1018 int itf; 1019 int arp_table; 1020 int misc_table; 1021 }; 1022 1023 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1024 loff_t *l) 1025 { 1026 struct hlist_node *e = state->node; 1027 struct lec_arp_table *tmp; 1028 1029 if (!e) 1030 e = tbl->first; 1031 if (e == (void *)1) { 1032 e = tbl->first; 1033 --*l; 1034 } 1035 1036 hlist_for_each_entry_from(tmp, e, next) { 1037 if (--*l < 0) 1038 break; 1039 } 1040 state->node = e; 1041 1042 return (*l < 0) ? state : NULL; 1043 } 1044 1045 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1046 struct lec_priv *priv) 1047 { 1048 void *v = NULL; 1049 int p; 1050 1051 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1052 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1053 if (v) 1054 break; 1055 } 1056 state->arp_table = p; 1057 return v; 1058 } 1059 1060 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1061 struct lec_priv *priv) 1062 { 1063 struct hlist_head *lec_misc_tables[] = { 1064 &priv->lec_arp_empty_ones, 1065 &priv->lec_no_forward, 1066 &priv->mcast_fwds 1067 }; 1068 void *v = NULL; 1069 int q; 1070 1071 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1072 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1073 if (v) 1074 break; 1075 } 1076 state->misc_table = q; 1077 return v; 1078 } 1079 1080 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1081 struct lec_priv *priv) 1082 { 1083 if (!state->locked) { 1084 state->locked = priv; 1085 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1086 } 1087 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1088 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1089 state->locked = NULL; 1090 /* Partial state reset for the next time we get called */ 1091 state->arp_table = state->misc_table = 0; 1092 } 1093 return state->locked; 1094 } 1095 1096 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1097 { 1098 struct net_device *dev; 1099 void *v; 1100 1101 dev = state->dev ? state->dev : dev_lec[state->itf]; 1102 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; 1103 if (!v && dev) { 1104 dev_put(dev); 1105 /* Partial state reset for the next time we get called */ 1106 dev = NULL; 1107 } 1108 state->dev = dev; 1109 return v; 1110 } 1111 1112 static void *lec_get_idx(struct lec_state *state, loff_t l) 1113 { 1114 void *v = NULL; 1115 1116 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1117 v = lec_itf_walk(state, &l); 1118 if (v) 1119 break; 1120 } 1121 return v; 1122 } 1123 1124 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1125 { 1126 struct lec_state *state = seq->private; 1127 1128 state->itf = 0; 1129 state->dev = NULL; 1130 state->locked = NULL; 1131 state->arp_table = 0; 1132 state->misc_table = 0; 1133 state->node = (void *)1; 1134 1135 return *pos ? lec_get_idx(state, *pos) : (void *)1; 1136 } 1137 1138 static void lec_seq_stop(struct seq_file *seq, void *v) 1139 { 1140 struct lec_state *state = seq->private; 1141 1142 if (state->dev) { 1143 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1144 state->flags); 1145 dev_put(state->dev); 1146 } 1147 } 1148 1149 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1150 { 1151 struct lec_state *state = seq->private; 1152 1153 v = lec_get_idx(state, 1); 1154 *pos += !!PTR_ERR(v); 1155 return v; 1156 } 1157 1158 static int lec_seq_show(struct seq_file *seq, void *v) 1159 { 1160 static char lec_banner[] = "Itf MAC ATM destination" 1161 " Status Flags " 1162 "VPI/VCI Recv VPI/VCI\n"; 1163 1164 if (v == (void *)1) 1165 seq_puts(seq, lec_banner); 1166 else { 1167 struct lec_state *state = seq->private; 1168 struct net_device *dev = state->dev; 1169 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1170 1171 seq_printf(seq, "%s ", dev->name); 1172 lec_info(seq, entry); 1173 } 1174 return 0; 1175 } 1176 1177 static struct seq_operations lec_seq_ops = { 1178 .start = lec_seq_start, 1179 .next = lec_seq_next, 1180 .stop = lec_seq_stop, 1181 .show = lec_seq_show, 1182 }; 1183 1184 static int lec_seq_open(struct inode *inode, struct file *file) 1185 { 1186 struct lec_state *state; 1187 struct seq_file *seq; 1188 int rc = -EAGAIN; 1189 1190 state = kmalloc(sizeof(*state), GFP_KERNEL); 1191 if (!state) { 1192 rc = -ENOMEM; 1193 goto out; 1194 } 1195 1196 rc = seq_open(file, &lec_seq_ops); 1197 if (rc) 1198 goto out_kfree; 1199 seq = file->private_data; 1200 seq->private = state; 1201 out: 1202 return rc; 1203 1204 out_kfree: 1205 kfree(state); 1206 goto out; 1207 } 1208 1209 static int lec_seq_release(struct inode *inode, struct file *file) 1210 { 1211 return seq_release_private(inode, file); 1212 } 1213 1214 static const struct file_operations lec_seq_fops = { 1215 .owner = THIS_MODULE, 1216 .open = lec_seq_open, 1217 .read = seq_read, 1218 .llseek = seq_lseek, 1219 .release = lec_seq_release, 1220 }; 1221 #endif 1222 1223 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1224 { 1225 struct atm_vcc *vcc = ATM_SD(sock); 1226 int err = 0; 1227 1228 switch (cmd) { 1229 case ATMLEC_CTRL: 1230 case ATMLEC_MCAST: 1231 case ATMLEC_DATA: 1232 if (!capable(CAP_NET_ADMIN)) 1233 return -EPERM; 1234 break; 1235 default: 1236 return -ENOIOCTLCMD; 1237 } 1238 1239 switch (cmd) { 1240 case ATMLEC_CTRL: 1241 err = lecd_attach(vcc, (int)arg); 1242 if (err >= 0) 1243 sock->state = SS_CONNECTED; 1244 break; 1245 case ATMLEC_MCAST: 1246 err = lec_mcast_attach(vcc, (int)arg); 1247 break; 1248 case ATMLEC_DATA: 1249 err = lec_vcc_attach(vcc, (void __user *)arg); 1250 break; 1251 } 1252 1253 return err; 1254 } 1255 1256 static struct atm_ioctl lane_ioctl_ops = { 1257 .owner = THIS_MODULE, 1258 .ioctl = lane_ioctl, 1259 }; 1260 1261 static int __init lane_module_init(void) 1262 { 1263 #ifdef CONFIG_PROC_FS 1264 struct proc_dir_entry *p; 1265 1266 p = create_proc_entry("lec", S_IRUGO, atm_proc_root); 1267 if (p) 1268 p->proc_fops = &lec_seq_fops; 1269 #endif 1270 1271 register_atm_ioctl(&lane_ioctl_ops); 1272 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1273 return 0; 1274 } 1275 1276 static void __exit lane_module_cleanup(void) 1277 { 1278 int i; 1279 struct lec_priv *priv; 1280 1281 remove_proc_entry("lec", atm_proc_root); 1282 1283 deregister_atm_ioctl(&lane_ioctl_ops); 1284 1285 for (i = 0; i < MAX_LEC_ITF; i++) { 1286 if (dev_lec[i] != NULL) { 1287 priv = (struct lec_priv *)dev_lec[i]->priv; 1288 unregister_netdev(dev_lec[i]); 1289 free_netdev(dev_lec[i]); 1290 dev_lec[i] = NULL; 1291 } 1292 } 1293 1294 return; 1295 } 1296 1297 module_init(lane_module_init); 1298 module_exit(lane_module_cleanup); 1299 1300 /* 1301 * LANE2: 3.1.3, LE_RESOLVE.request 1302 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1303 * If sizeoftlvs == NULL the default TLVs associated with with this 1304 * lec will be used. 1305 * If dst_mac == NULL, targetless LE_ARP will be sent 1306 */ 1307 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 1308 u8 **tlvs, u32 *sizeoftlvs) 1309 { 1310 unsigned long flags; 1311 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1312 struct lec_arp_table *table; 1313 struct sk_buff *skb; 1314 int retval; 1315 1316 if (force == 0) { 1317 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1318 table = lec_arp_find(priv, dst_mac); 1319 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1320 if (table == NULL) 1321 return -1; 1322 1323 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1324 if (*tlvs == NULL) 1325 return -1; 1326 1327 *sizeoftlvs = table->sizeoftlvs; 1328 1329 return 0; 1330 } 1331 1332 if (sizeoftlvs == NULL) 1333 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1334 1335 else { 1336 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1337 if (skb == NULL) 1338 return -1; 1339 skb->len = *sizeoftlvs; 1340 memcpy(skb->data, *tlvs, *sizeoftlvs); 1341 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1342 } 1343 return retval; 1344 } 1345 1346 /* 1347 * LANE2: 3.1.4, LE_ASSOCIATE.request 1348 * Associate the *tlvs with the *lan_dst address. 1349 * Will overwrite any previous association 1350 * Returns 1 for success, 0 for failure (out of memory) 1351 * 1352 */ 1353 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 1354 u8 *tlvs, u32 sizeoftlvs) 1355 { 1356 int retval; 1357 struct sk_buff *skb; 1358 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1359 1360 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1361 return (0); /* not our mac address */ 1362 1363 kfree(priv->tlvs); /* NULL if there was no previous association */ 1364 1365 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1366 if (priv->tlvs == NULL) 1367 return (0); 1368 priv->sizeoftlvs = sizeoftlvs; 1369 1370 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1371 if (skb == NULL) 1372 return 0; 1373 skb->len = sizeoftlvs; 1374 memcpy(skb->data, tlvs, sizeoftlvs); 1375 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1376 if (retval != 0) 1377 printk("lec.c: lane2_associate_req() failed\n"); 1378 /* 1379 * If the previous association has changed we must 1380 * somehow notify other LANE entities about the change 1381 */ 1382 return (1); 1383 } 1384 1385 /* 1386 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1387 * 1388 */ 1389 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr, 1390 u8 *tlvs, u32 sizeoftlvs) 1391 { 1392 #if 0 1393 int i = 0; 1394 #endif 1395 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1396 #if 0 /* 1397 * Why have the TLVs in LE_ARP entries 1398 * since we do not use them? When you 1399 * uncomment this code, make sure the 1400 * TLVs get freed when entry is killed 1401 */ 1402 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1403 1404 if (entry == NULL) 1405 return; /* should not happen */ 1406 1407 kfree(entry->tlvs); 1408 1409 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1410 if (entry->tlvs == NULL) 1411 return; 1412 entry->sizeoftlvs = sizeoftlvs; 1413 #endif 1414 #if 0 1415 printk("lec.c: lane2_associate_ind()\n"); 1416 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1417 while (i < sizeoftlvs) 1418 printk("%02x ", tlvs[i++]); 1419 1420 printk("\n"); 1421 #endif 1422 1423 /* tell MPOA about the TLVs we saw */ 1424 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1425 priv->lane2_ops->associate_indicator(dev, mac_addr, 1426 tlvs, sizeoftlvs); 1427 } 1428 return; 1429 } 1430 1431 /* 1432 * Here starts what used to lec_arpc.c 1433 * 1434 * lec_arpc.c was added here when making 1435 * lane client modular. October 1997 1436 */ 1437 1438 #include <linux/types.h> 1439 #include <linux/timer.h> 1440 #include <asm/param.h> 1441 #include <asm/atomic.h> 1442 #include <linux/inetdevice.h> 1443 #include <net/route.h> 1444 1445 #if 0 1446 #define DPRINTK(format,args...) 1447 /* 1448 #define DPRINTK printk 1449 */ 1450 #endif 1451 #define DEBUG_ARP_TABLE 0 1452 1453 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1454 1455 static void lec_arp_check_expire(struct work_struct *work); 1456 static void lec_arp_expire_arp(unsigned long data); 1457 1458 /* 1459 * Arp table funcs 1460 */ 1461 1462 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1463 1464 /* 1465 * Initialization of arp-cache 1466 */ 1467 static void lec_arp_init(struct lec_priv *priv) 1468 { 1469 unsigned short i; 1470 1471 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1472 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1473 } 1474 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1475 INIT_HLIST_HEAD(&priv->lec_no_forward); 1476 INIT_HLIST_HEAD(&priv->mcast_fwds); 1477 spin_lock_init(&priv->lec_arp_lock); 1478 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1479 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1480 } 1481 1482 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1483 { 1484 if (entry->vcc) { 1485 struct atm_vcc *vcc = entry->vcc; 1486 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1487 struct net_device *dev = (struct net_device *)vcc->proto_data; 1488 1489 vcc->pop = vpriv->old_pop; 1490 if (vpriv->xoff) 1491 netif_wake_queue(dev); 1492 kfree(vpriv); 1493 vcc->user_back = NULL; 1494 vcc->push = entry->old_push; 1495 vcc_release_async(vcc, -EPIPE); 1496 entry->vcc = NULL; 1497 } 1498 if (entry->recv_vcc) { 1499 entry->recv_vcc->push = entry->old_recv_push; 1500 vcc_release_async(entry->recv_vcc, -EPIPE); 1501 entry->recv_vcc = NULL; 1502 } 1503 } 1504 1505 /* 1506 * Insert entry to lec_arp_table 1507 * LANE2: Add to the end of the list to satisfy 8.1.13 1508 */ 1509 static inline void 1510 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1511 { 1512 struct hlist_head *tmp; 1513 1514 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1515 hlist_add_head(&entry->next, tmp); 1516 1517 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1518 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1519 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1520 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1521 } 1522 1523 /* 1524 * Remove entry from lec_arp_table 1525 */ 1526 static int 1527 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1528 { 1529 struct hlist_node *node; 1530 struct lec_arp_table *entry; 1531 int i, remove_vcc = 1; 1532 1533 if (!to_remove) { 1534 return -1; 1535 } 1536 1537 hlist_del(&to_remove->next); 1538 del_timer(&to_remove->timer); 1539 1540 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1541 if (to_remove->status >= ESI_FLUSH_PENDING) { 1542 /* 1543 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1544 */ 1545 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1546 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1547 if (memcmp(to_remove->atm_addr, 1548 entry->atm_addr, ATM_ESA_LEN) == 0) { 1549 remove_vcc = 0; 1550 break; 1551 } 1552 } 1553 } 1554 if (remove_vcc) 1555 lec_arp_clear_vccs(to_remove); 1556 } 1557 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1558 1559 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1560 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1561 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1562 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1563 return 0; 1564 } 1565 1566 #if DEBUG_ARP_TABLE 1567 static char *get_status_string(unsigned char st) 1568 { 1569 switch (st) { 1570 case ESI_UNKNOWN: 1571 return "ESI_UNKNOWN"; 1572 case ESI_ARP_PENDING: 1573 return "ESI_ARP_PENDING"; 1574 case ESI_VC_PENDING: 1575 return "ESI_VC_PENDING"; 1576 case ESI_FLUSH_PENDING: 1577 return "ESI_FLUSH_PENDING"; 1578 case ESI_FORWARD_DIRECT: 1579 return "ESI_FORWARD_DIRECT"; 1580 default: 1581 return "<UNKNOWN>"; 1582 } 1583 } 1584 1585 static void dump_arp_table(struct lec_priv *priv) 1586 { 1587 struct hlist_node *node; 1588 struct lec_arp_table *rulla; 1589 char buf[256]; 1590 int i, j, offset; 1591 1592 printk("Dump %p:\n", priv); 1593 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1594 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1595 offset = 0; 1596 offset += sprintf(buf, "%d: %p\n", i, rulla); 1597 offset += sprintf(buf + offset, "Mac:"); 1598 for (j = 0; j < ETH_ALEN; j++) { 1599 offset += sprintf(buf + offset, 1600 "%2.2x ", 1601 rulla->mac_addr[j] & 0xff); 1602 } 1603 offset += sprintf(buf + offset, "Atm:"); 1604 for (j = 0; j < ATM_ESA_LEN; j++) { 1605 offset += sprintf(buf + offset, 1606 "%2.2x ", 1607 rulla->atm_addr[j] & 0xff); 1608 } 1609 offset += sprintf(buf + offset, 1610 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1611 rulla->vcc ? rulla->vcc->vpi : 0, 1612 rulla->vcc ? rulla->vcc->vci : 0, 1613 rulla->recv_vcc ? rulla->recv_vcc-> 1614 vpi : 0, 1615 rulla->recv_vcc ? rulla->recv_vcc-> 1616 vci : 0, rulla->last_used, 1617 rulla->timestamp, rulla->no_tries); 1618 offset += 1619 sprintf(buf + offset, 1620 "Flags:%x, Packets_flooded:%x, Status: %s ", 1621 rulla->flags, rulla->packets_flooded, 1622 get_status_string(rulla->status)); 1623 printk("%s\n", buf); 1624 } 1625 } 1626 1627 if (!hlist_empty(&priv->lec_no_forward)) 1628 printk("No forward\n"); 1629 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1630 offset = 0; 1631 offset += sprintf(buf + offset, "Mac:"); 1632 for (j = 0; j < ETH_ALEN; j++) { 1633 offset += sprintf(buf + offset, "%2.2x ", 1634 rulla->mac_addr[j] & 0xff); 1635 } 1636 offset += sprintf(buf + offset, "Atm:"); 1637 for (j = 0; j < ATM_ESA_LEN; j++) { 1638 offset += sprintf(buf + offset, "%2.2x ", 1639 rulla->atm_addr[j] & 0xff); 1640 } 1641 offset += sprintf(buf + offset, 1642 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1643 rulla->vcc ? rulla->vcc->vpi : 0, 1644 rulla->vcc ? rulla->vcc->vci : 0, 1645 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1646 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1647 rulla->last_used, 1648 rulla->timestamp, rulla->no_tries); 1649 offset += sprintf(buf + offset, 1650 "Flags:%x, Packets_flooded:%x, Status: %s ", 1651 rulla->flags, rulla->packets_flooded, 1652 get_status_string(rulla->status)); 1653 printk("%s\n", buf); 1654 } 1655 1656 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1657 printk("Empty ones\n"); 1658 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { 1659 offset = 0; 1660 offset += sprintf(buf + offset, "Mac:"); 1661 for (j = 0; j < ETH_ALEN; j++) { 1662 offset += sprintf(buf + offset, "%2.2x ", 1663 rulla->mac_addr[j] & 0xff); 1664 } 1665 offset += sprintf(buf + offset, "Atm:"); 1666 for (j = 0; j < ATM_ESA_LEN; j++) { 1667 offset += sprintf(buf + offset, "%2.2x ", 1668 rulla->atm_addr[j] & 0xff); 1669 } 1670 offset += sprintf(buf + offset, 1671 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1672 rulla->vcc ? rulla->vcc->vpi : 0, 1673 rulla->vcc ? rulla->vcc->vci : 0, 1674 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1675 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1676 rulla->last_used, 1677 rulla->timestamp, rulla->no_tries); 1678 offset += sprintf(buf + offset, 1679 "Flags:%x, Packets_flooded:%x, Status: %s ", 1680 rulla->flags, rulla->packets_flooded, 1681 get_status_string(rulla->status)); 1682 printk("%s", buf); 1683 } 1684 1685 if (!hlist_empty(&priv->mcast_fwds)) 1686 printk("Multicast Forward VCCs\n"); 1687 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { 1688 offset = 0; 1689 offset += sprintf(buf + offset, "Mac:"); 1690 for (j = 0; j < ETH_ALEN; j++) { 1691 offset += sprintf(buf + offset, "%2.2x ", 1692 rulla->mac_addr[j] & 0xff); 1693 } 1694 offset += sprintf(buf + offset, "Atm:"); 1695 for (j = 0; j < ATM_ESA_LEN; j++) { 1696 offset += sprintf(buf + offset, "%2.2x ", 1697 rulla->atm_addr[j] & 0xff); 1698 } 1699 offset += sprintf(buf + offset, 1700 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1701 rulla->vcc ? rulla->vcc->vpi : 0, 1702 rulla->vcc ? rulla->vcc->vci : 0, 1703 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1704 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1705 rulla->last_used, 1706 rulla->timestamp, rulla->no_tries); 1707 offset += sprintf(buf + offset, 1708 "Flags:%x, Packets_flooded:%x, Status: %s ", 1709 rulla->flags, rulla->packets_flooded, 1710 get_status_string(rulla->status)); 1711 printk("%s\n", buf); 1712 } 1713 1714 } 1715 #else 1716 #define dump_arp_table(priv) do { } while (0) 1717 #endif 1718 1719 /* 1720 * Destruction of arp-cache 1721 */ 1722 static void lec_arp_destroy(struct lec_priv *priv) 1723 { 1724 unsigned long flags; 1725 struct hlist_node *node, *next; 1726 struct lec_arp_table *entry; 1727 int i; 1728 1729 cancel_rearming_delayed_work(&priv->lec_arp_work); 1730 1731 /* 1732 * Remove all entries 1733 */ 1734 1735 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1736 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1737 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1738 lec_arp_remove(priv, entry); 1739 lec_arp_put(entry); 1740 } 1741 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1742 } 1743 1744 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 1745 del_timer_sync(&entry->timer); 1746 lec_arp_clear_vccs(entry); 1747 hlist_del(&entry->next); 1748 lec_arp_put(entry); 1749 } 1750 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1751 1752 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1753 del_timer_sync(&entry->timer); 1754 lec_arp_clear_vccs(entry); 1755 hlist_del(&entry->next); 1756 lec_arp_put(entry); 1757 } 1758 INIT_HLIST_HEAD(&priv->lec_no_forward); 1759 1760 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1761 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1762 lec_arp_clear_vccs(entry); 1763 hlist_del(&entry->next); 1764 lec_arp_put(entry); 1765 } 1766 INIT_HLIST_HEAD(&priv->mcast_fwds); 1767 priv->mcast_vcc = NULL; 1768 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1769 } 1770 1771 /* 1772 * Find entry by mac_address 1773 */ 1774 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1775 unsigned char *mac_addr) 1776 { 1777 struct hlist_node *node; 1778 struct hlist_head *head; 1779 struct lec_arp_table *entry; 1780 1781 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1782 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1783 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1784 1785 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1786 hlist_for_each_entry(entry, node, head, next) { 1787 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1788 return entry; 1789 } 1790 } 1791 return NULL; 1792 } 1793 1794 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1795 unsigned char *mac_addr) 1796 { 1797 struct lec_arp_table *to_return; 1798 1799 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1800 if (!to_return) { 1801 printk("LEC: Arp entry kmalloc failed\n"); 1802 return NULL; 1803 } 1804 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1805 INIT_HLIST_NODE(&to_return->next); 1806 init_timer(&to_return->timer); 1807 to_return->timer.function = lec_arp_expire_arp; 1808 to_return->timer.data = (unsigned long)to_return; 1809 to_return->last_used = jiffies; 1810 to_return->priv = priv; 1811 skb_queue_head_init(&to_return->tx_wait); 1812 atomic_set(&to_return->usage, 1); 1813 return to_return; 1814 } 1815 1816 /* Arp sent timer expired */ 1817 static void lec_arp_expire_arp(unsigned long data) 1818 { 1819 struct lec_arp_table *entry; 1820 1821 entry = (struct lec_arp_table *)data; 1822 1823 DPRINTK("lec_arp_expire_arp\n"); 1824 if (entry->status == ESI_ARP_PENDING) { 1825 if (entry->no_tries <= entry->priv->max_retry_count) { 1826 if (entry->is_rdesc) 1827 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1828 entry->mac_addr, NULL, NULL); 1829 else 1830 send_to_lecd(entry->priv, l_arp_xmt, 1831 entry->mac_addr, NULL, NULL); 1832 entry->no_tries++; 1833 } 1834 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1835 } 1836 } 1837 1838 /* Unknown/unused vcc expire, remove associated entry */ 1839 static void lec_arp_expire_vcc(unsigned long data) 1840 { 1841 unsigned long flags; 1842 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1843 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1844 1845 del_timer(&to_remove->timer); 1846 1847 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1848 to_remove, priv, 1849 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1850 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1851 1852 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1853 hlist_del(&to_remove->next); 1854 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1855 1856 lec_arp_clear_vccs(to_remove); 1857 lec_arp_put(to_remove); 1858 } 1859 1860 /* 1861 * Expire entries. 1862 * 1. Re-set timer 1863 * 2. For each entry, delete entries that have aged past the age limit. 1864 * 3. For each entry, depending on the status of the entry, perform 1865 * the following maintenance. 1866 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1867 * tick_count is above the max_unknown_frame_time, clear 1868 * the tick_count to zero and clear the packets_flooded counter 1869 * to zero. This supports the packet rate limit per address 1870 * while flooding unknowns. 1871 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1872 * than or equal to the path_switching_delay, change the status 1873 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1874 * regardless of the progress of the flush protocol. 1875 */ 1876 static void lec_arp_check_expire(struct work_struct *work) 1877 { 1878 unsigned long flags; 1879 struct lec_priv *priv = 1880 container_of(work, struct lec_priv, lec_arp_work.work); 1881 struct hlist_node *node, *next; 1882 struct lec_arp_table *entry; 1883 unsigned long now; 1884 unsigned long time_to_check; 1885 int i; 1886 1887 DPRINTK("lec_arp_check_expire %p\n", priv); 1888 now = jiffies; 1889 restart: 1890 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1891 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1892 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1893 if ((entry->flags) & LEC_REMOTE_FLAG && 1894 priv->topology_change) 1895 time_to_check = priv->forward_delay_time; 1896 else 1897 time_to_check = priv->aging_time; 1898 1899 DPRINTK("About to expire: %lx - %lx > %lx\n", 1900 now, entry->last_used, time_to_check); 1901 if (time_after(now, entry->last_used + time_to_check) 1902 && !(entry->flags & LEC_PERMANENT_FLAG) 1903 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1904 /* Remove entry */ 1905 DPRINTK("LEC:Entry timed out\n"); 1906 lec_arp_remove(priv, entry); 1907 lec_arp_put(entry); 1908 } else { 1909 /* Something else */ 1910 if ((entry->status == ESI_VC_PENDING || 1911 entry->status == ESI_ARP_PENDING) 1912 && time_after_eq(now, 1913 entry->timestamp + 1914 priv-> 1915 max_unknown_frame_time)) { 1916 entry->timestamp = jiffies; 1917 entry->packets_flooded = 0; 1918 if (entry->status == ESI_VC_PENDING) 1919 send_to_lecd(priv, l_svc_setup, 1920 entry->mac_addr, 1921 entry->atm_addr, 1922 NULL); 1923 } 1924 if (entry->status == ESI_FLUSH_PENDING 1925 && 1926 time_after_eq(now, entry->timestamp + 1927 priv->path_switching_delay)) { 1928 struct sk_buff *skb; 1929 struct atm_vcc *vcc = entry->vcc; 1930 1931 lec_arp_hold(entry); 1932 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1933 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1934 lec_send(vcc, skb, entry->priv); 1935 entry->last_used = jiffies; 1936 entry->status = ESI_FORWARD_DIRECT; 1937 lec_arp_put(entry); 1938 goto restart; 1939 } 1940 } 1941 } 1942 } 1943 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1944 1945 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1946 } 1947 1948 /* 1949 * Try to find vcc where mac_address is attached. 1950 * 1951 */ 1952 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1953 unsigned char *mac_to_find, int is_rdesc, 1954 struct lec_arp_table **ret_entry) 1955 { 1956 unsigned long flags; 1957 struct lec_arp_table *entry; 1958 struct atm_vcc *found; 1959 1960 if (mac_to_find[0] & 0x01) { 1961 switch (priv->lane_version) { 1962 case 1: 1963 return priv->mcast_vcc; 1964 break; 1965 case 2: /* LANE2 wants arp for multicast addresses */ 1966 if (!compare_ether_addr(mac_to_find, bus_mac)) 1967 return priv->mcast_vcc; 1968 break; 1969 default: 1970 break; 1971 } 1972 } 1973 1974 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1975 entry = lec_arp_find(priv, mac_to_find); 1976 1977 if (entry) { 1978 if (entry->status == ESI_FORWARD_DIRECT) { 1979 /* Connection Ok */ 1980 entry->last_used = jiffies; 1981 lec_arp_hold(entry); 1982 *ret_entry = entry; 1983 found = entry->vcc; 1984 goto out; 1985 } 1986 /* 1987 * If the LE_ARP cache entry is still pending, reset count to 0 1988 * so another LE_ARP request can be made for this frame. 1989 */ 1990 if (entry->status == ESI_ARP_PENDING) { 1991 entry->no_tries = 0; 1992 } 1993 /* 1994 * Data direct VC not yet set up, check to see if the unknown 1995 * frame count is greater than the limit. If the limit has 1996 * not been reached, allow the caller to send packet to 1997 * BUS. 1998 */ 1999 if (entry->status != ESI_FLUSH_PENDING && 2000 entry->packets_flooded < 2001 priv->maximum_unknown_frame_count) { 2002 entry->packets_flooded++; 2003 DPRINTK("LEC_ARP: Flooding..\n"); 2004 found = priv->mcast_vcc; 2005 goto out; 2006 } 2007 /* 2008 * We got here because entry->status == ESI_FLUSH_PENDING 2009 * or BUS flood limit was reached for an entry which is 2010 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 2011 */ 2012 lec_arp_hold(entry); 2013 *ret_entry = entry; 2014 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, 2015 entry->vcc); 2016 found = NULL; 2017 } else { 2018 /* No matching entry was found */ 2019 entry = make_entry(priv, mac_to_find); 2020 DPRINTK("LEC_ARP: Making entry\n"); 2021 if (!entry) { 2022 found = priv->mcast_vcc; 2023 goto out; 2024 } 2025 lec_arp_add(priv, entry); 2026 /* We want arp-request(s) to be sent */ 2027 entry->packets_flooded = 1; 2028 entry->status = ESI_ARP_PENDING; 2029 entry->no_tries = 1; 2030 entry->last_used = entry->timestamp = jiffies; 2031 entry->is_rdesc = is_rdesc; 2032 if (entry->is_rdesc) 2033 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 2034 NULL); 2035 else 2036 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 2037 entry->timer.expires = jiffies + (1 * HZ); 2038 entry->timer.function = lec_arp_expire_arp; 2039 add_timer(&entry->timer); 2040 found = priv->mcast_vcc; 2041 } 2042 2043 out: 2044 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2045 return found; 2046 } 2047 2048 static int 2049 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 2050 unsigned long permanent) 2051 { 2052 unsigned long flags; 2053 struct hlist_node *node, *next; 2054 struct lec_arp_table *entry; 2055 int i; 2056 2057 DPRINTK("lec_addr_delete\n"); 2058 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2059 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2060 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2061 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2062 && (permanent || 2063 !(entry->flags & LEC_PERMANENT_FLAG))) { 2064 lec_arp_remove(priv, entry); 2065 lec_arp_put(entry); 2066 } 2067 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2068 return 0; 2069 } 2070 } 2071 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2072 return -1; 2073 } 2074 2075 /* 2076 * Notifies: Response to arp_request (atm_addr != NULL) 2077 */ 2078 static void 2079 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 2080 unsigned char *atm_addr, unsigned long remoteflag, 2081 unsigned int targetless_le_arp) 2082 { 2083 unsigned long flags; 2084 struct hlist_node *node, *next; 2085 struct lec_arp_table *entry, *tmp; 2086 int i; 2087 2088 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2089 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2090 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2091 mac_addr[4], mac_addr[5]); 2092 2093 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2094 entry = lec_arp_find(priv, mac_addr); 2095 if (entry == NULL && targetless_le_arp) 2096 goto out; /* 2097 * LANE2: ignore targetless LE_ARPs for which 2098 * we have no entry in the cache. 7.1.30 2099 */ 2100 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2101 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2102 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2103 hlist_del(&entry->next); 2104 del_timer(&entry->timer); 2105 tmp = lec_arp_find(priv, mac_addr); 2106 if (tmp) { 2107 del_timer(&tmp->timer); 2108 tmp->status = ESI_FORWARD_DIRECT; 2109 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2110 tmp->vcc = entry->vcc; 2111 tmp->old_push = entry->old_push; 2112 tmp->last_used = jiffies; 2113 del_timer(&entry->timer); 2114 lec_arp_put(entry); 2115 entry = tmp; 2116 } else { 2117 entry->status = ESI_FORWARD_DIRECT; 2118 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2119 entry->last_used = jiffies; 2120 lec_arp_add(priv, entry); 2121 } 2122 if (remoteflag) 2123 entry->flags |= LEC_REMOTE_FLAG; 2124 else 2125 entry->flags &= ~LEC_REMOTE_FLAG; 2126 DPRINTK("After update\n"); 2127 dump_arp_table(priv); 2128 goto out; 2129 } 2130 } 2131 } 2132 2133 entry = lec_arp_find(priv, mac_addr); 2134 if (!entry) { 2135 entry = make_entry(priv, mac_addr); 2136 if (!entry) 2137 goto out; 2138 entry->status = ESI_UNKNOWN; 2139 lec_arp_add(priv, entry); 2140 /* Temporary, changes before end of function */ 2141 } 2142 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2143 del_timer(&entry->timer); 2144 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2145 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2146 if (entry != tmp && 2147 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2148 /* Vcc to this host exists */ 2149 if (tmp->status > ESI_VC_PENDING) { 2150 /* 2151 * ESI_FLUSH_PENDING, 2152 * ESI_FORWARD_DIRECT 2153 */ 2154 entry->vcc = tmp->vcc; 2155 entry->old_push = tmp->old_push; 2156 } 2157 entry->status = tmp->status; 2158 break; 2159 } 2160 } 2161 } 2162 if (remoteflag) 2163 entry->flags |= LEC_REMOTE_FLAG; 2164 else 2165 entry->flags &= ~LEC_REMOTE_FLAG; 2166 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2167 entry->status = ESI_VC_PENDING; 2168 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2169 } 2170 DPRINTK("After update2\n"); 2171 dump_arp_table(priv); 2172 out: 2173 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2174 } 2175 2176 /* 2177 * Notifies: Vcc setup ready 2178 */ 2179 static void 2180 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 2181 struct atm_vcc *vcc, 2182 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2183 { 2184 unsigned long flags; 2185 struct hlist_node *node; 2186 struct lec_arp_table *entry; 2187 int i, found_entry = 0; 2188 2189 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2190 if (ioc_data->receive == 2) { 2191 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2192 2193 DPRINTK("LEC_ARP: Attaching mcast forward\n"); 2194 #if 0 2195 entry = lec_arp_find(priv, bus_mac); 2196 if (!entry) { 2197 printk("LEC_ARP: Multicast entry not found!\n"); 2198 goto out; 2199 } 2200 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2201 entry->recv_vcc = vcc; 2202 entry->old_recv_push = old_push; 2203 #endif 2204 entry = make_entry(priv, bus_mac); 2205 if (entry == NULL) 2206 goto out; 2207 del_timer(&entry->timer); 2208 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2209 entry->recv_vcc = vcc; 2210 entry->old_recv_push = old_push; 2211 hlist_add_head(&entry->next, &priv->mcast_fwds); 2212 goto out; 2213 } else if (ioc_data->receive == 1) { 2214 /* 2215 * Vcc which we don't want to make default vcc, 2216 * attach it anyway. 2217 */ 2218 DPRINTK 2219 ("LEC_ARP:Attaching data direct, not default: " 2220 "%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", 2221 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2222 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2223 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2224 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2225 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2226 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2227 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2228 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2229 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2230 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2231 entry = make_entry(priv, bus_mac); 2232 if (entry == NULL) 2233 goto out; 2234 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2235 memset(entry->mac_addr, 0, ETH_ALEN); 2236 entry->recv_vcc = vcc; 2237 entry->old_recv_push = old_push; 2238 entry->status = ESI_UNKNOWN; 2239 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2240 entry->timer.function = lec_arp_expire_vcc; 2241 hlist_add_head(&entry->next, &priv->lec_no_forward); 2242 add_timer(&entry->timer); 2243 dump_arp_table(priv); 2244 goto out; 2245 } 2246 DPRINTK 2247 ("LEC_ARP:Attaching data direct, default: " 2248 "%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", 2249 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2250 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2251 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2252 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2253 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2254 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2255 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2256 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2257 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2258 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2259 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2260 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2261 if (memcmp 2262 (ioc_data->atm_addr, entry->atm_addr, 2263 ATM_ESA_LEN) == 0) { 2264 DPRINTK("LEC_ARP: Attaching data direct\n"); 2265 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", 2266 entry->vcc ? entry->vcc->vci : 0, 2267 entry->recv_vcc ? entry->recv_vcc-> 2268 vci : 0); 2269 found_entry = 1; 2270 del_timer(&entry->timer); 2271 entry->vcc = vcc; 2272 entry->old_push = old_push; 2273 if (entry->status == ESI_VC_PENDING) { 2274 if (priv->maximum_unknown_frame_count 2275 == 0) 2276 entry->status = 2277 ESI_FORWARD_DIRECT; 2278 else { 2279 entry->timestamp = jiffies; 2280 entry->status = 2281 ESI_FLUSH_PENDING; 2282 #if 0 2283 send_to_lecd(priv, l_flush_xmt, 2284 NULL, 2285 entry->atm_addr, 2286 NULL); 2287 #endif 2288 } 2289 } else { 2290 /* 2291 * They were forming a connection 2292 * to us, and we to them. Our 2293 * ATM address is numerically lower 2294 * than theirs, so we make connection 2295 * we formed into default VCC (8.1.11). 2296 * Connection they made gets torn 2297 * down. This might confuse some 2298 * clients. Can be changed if 2299 * someone reports trouble... 2300 */ 2301 ; 2302 } 2303 } 2304 } 2305 } 2306 if (found_entry) { 2307 DPRINTK("After vcc was added\n"); 2308 dump_arp_table(priv); 2309 goto out; 2310 } 2311 /* 2312 * Not found, snatch address from first data packet that arrives 2313 * from this vcc 2314 */ 2315 entry = make_entry(priv, bus_mac); 2316 if (!entry) 2317 goto out; 2318 entry->vcc = vcc; 2319 entry->old_push = old_push; 2320 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2321 memset(entry->mac_addr, 0, ETH_ALEN); 2322 entry->status = ESI_UNKNOWN; 2323 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2324 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2325 entry->timer.function = lec_arp_expire_vcc; 2326 add_timer(&entry->timer); 2327 DPRINTK("After vcc was added\n"); 2328 dump_arp_table(priv); 2329 out: 2330 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2331 } 2332 2333 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2334 { 2335 unsigned long flags; 2336 struct hlist_node *node; 2337 struct lec_arp_table *entry; 2338 int i; 2339 2340 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id); 2341 restart: 2342 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2343 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2344 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2345 if (entry->flush_tran_id == tran_id 2346 && entry->status == ESI_FLUSH_PENDING) { 2347 struct sk_buff *skb; 2348 struct atm_vcc *vcc = entry->vcc; 2349 2350 lec_arp_hold(entry); 2351 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2352 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2353 lec_send(vcc, skb, entry->priv); 2354 entry->last_used = jiffies; 2355 entry->status = ESI_FORWARD_DIRECT; 2356 lec_arp_put(entry); 2357 DPRINTK("LEC_ARP: Flushed\n"); 2358 goto restart; 2359 } 2360 } 2361 } 2362 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2363 dump_arp_table(priv); 2364 } 2365 2366 static void 2367 lec_set_flush_tran_id(struct lec_priv *priv, 2368 unsigned char *atm_addr, unsigned long tran_id) 2369 { 2370 unsigned long flags; 2371 struct hlist_node *node; 2372 struct lec_arp_table *entry; 2373 int i; 2374 2375 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2376 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2377 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2378 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2379 entry->flush_tran_id = tran_id; 2380 DPRINTK("Set flush transaction id to %lx for %p\n", 2381 tran_id, entry); 2382 } 2383 } 2384 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2385 } 2386 2387 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2388 { 2389 unsigned long flags; 2390 unsigned char mac_addr[] = { 2391 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2392 }; 2393 struct lec_arp_table *to_add; 2394 struct lec_vcc_priv *vpriv; 2395 int err = 0; 2396 2397 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2398 return -ENOMEM; 2399 vpriv->xoff = 0; 2400 vpriv->old_pop = vcc->pop; 2401 vcc->user_back = vpriv; 2402 vcc->pop = lec_pop; 2403 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2404 to_add = make_entry(priv, mac_addr); 2405 if (!to_add) { 2406 vcc->pop = vpriv->old_pop; 2407 kfree(vpriv); 2408 err = -ENOMEM; 2409 goto out; 2410 } 2411 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2412 to_add->status = ESI_FORWARD_DIRECT; 2413 to_add->flags |= LEC_PERMANENT_FLAG; 2414 to_add->vcc = vcc; 2415 to_add->old_push = vcc->push; 2416 vcc->push = lec_push; 2417 priv->mcast_vcc = vcc; 2418 lec_arp_add(priv, to_add); 2419 out: 2420 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2421 return err; 2422 } 2423 2424 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2425 { 2426 unsigned long flags; 2427 struct hlist_node *node, *next; 2428 struct lec_arp_table *entry; 2429 int i; 2430 2431 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2432 dump_arp_table(priv); 2433 2434 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2435 2436 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2437 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2438 if (vcc == entry->vcc) { 2439 lec_arp_remove(priv, entry); 2440 lec_arp_put(entry); 2441 if (priv->mcast_vcc == vcc) { 2442 priv->mcast_vcc = NULL; 2443 } 2444 } 2445 } 2446 } 2447 2448 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2449 if (entry->vcc == vcc) { 2450 lec_arp_clear_vccs(entry); 2451 del_timer(&entry->timer); 2452 hlist_del(&entry->next); 2453 lec_arp_put(entry); 2454 } 2455 } 2456 2457 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2458 if (entry->recv_vcc == vcc) { 2459 lec_arp_clear_vccs(entry); 2460 del_timer(&entry->timer); 2461 hlist_del(&entry->next); 2462 lec_arp_put(entry); 2463 } 2464 } 2465 2466 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2467 if (entry->recv_vcc == vcc) { 2468 lec_arp_clear_vccs(entry); 2469 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2470 hlist_del(&entry->next); 2471 lec_arp_put(entry); 2472 } 2473 } 2474 2475 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2476 dump_arp_table(priv); 2477 } 2478 2479 static void 2480 lec_arp_check_empties(struct lec_priv *priv, 2481 struct atm_vcc *vcc, struct sk_buff *skb) 2482 { 2483 unsigned long flags; 2484 struct hlist_node *node, *next; 2485 struct lec_arp_table *entry, *tmp; 2486 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2487 unsigned char *src; 2488 #ifdef CONFIG_TR 2489 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2490 2491 if (priv->is_trdev) 2492 src = tr_hdr->h_source; 2493 else 2494 #endif 2495 src = hdr->h_source; 2496 2497 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2498 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2499 if (vcc == entry->vcc) { 2500 del_timer(&entry->timer); 2501 memcpy(entry->mac_addr, src, ETH_ALEN); 2502 entry->status = ESI_FORWARD_DIRECT; 2503 entry->last_used = jiffies; 2504 /* We might have got an entry */ 2505 if ((tmp = lec_arp_find(priv, src))) { 2506 lec_arp_remove(priv, tmp); 2507 lec_arp_put(tmp); 2508 } 2509 hlist_del(&entry->next); 2510 lec_arp_add(priv, entry); 2511 goto out; 2512 } 2513 } 2514 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); 2515 out: 2516 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2517 } 2518 2519 MODULE_LICENSE("GPL"); 2520