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->dev = dev; 829 skb_pull(skb, 2); /* skip lec_id */ 830 #ifdef CONFIG_TR 831 if (priv->is_trdev) 832 skb->protocol = tr_type_trans(skb, dev); 833 else 834 #endif 835 skb->protocol = eth_type_trans(skb, dev); 836 priv->stats.rx_packets++; 837 priv->stats.rx_bytes += skb->len; 838 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 839 netif_rx(skb); 840 } 841 } 842 843 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 844 { 845 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 846 struct net_device *dev = skb->dev; 847 848 if (vpriv == NULL) { 849 printk("lec_pop(): vpriv = NULL!?!?!?\n"); 850 return; 851 } 852 853 vpriv->old_pop(vcc, skb); 854 855 if (vpriv->xoff && atm_may_send(vcc, 0)) { 856 vpriv->xoff = 0; 857 if (netif_running(dev) && netif_queue_stopped(dev)) 858 netif_wake_queue(dev); 859 } 860 } 861 862 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 863 { 864 struct lec_vcc_priv *vpriv; 865 int bytes_left; 866 struct atmlec_ioc ioc_data; 867 868 /* Lecd must be up in this case */ 869 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 870 if (bytes_left != 0) { 871 printk 872 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", 873 bytes_left); 874 } 875 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 876 !dev_lec[ioc_data.dev_num]) 877 return -EINVAL; 878 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 879 return -ENOMEM; 880 vpriv->xoff = 0; 881 vpriv->old_pop = vcc->pop; 882 vcc->user_back = vpriv; 883 vcc->pop = lec_pop; 884 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, 885 &ioc_data, vcc, vcc->push); 886 vcc->proto_data = dev_lec[ioc_data.dev_num]; 887 vcc->push = lec_push; 888 return 0; 889 } 890 891 static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 892 { 893 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 894 return -EINVAL; 895 vcc->proto_data = dev_lec[arg]; 896 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); 897 } 898 899 /* Initialize device. */ 900 static int lecd_attach(struct atm_vcc *vcc, int arg) 901 { 902 int i; 903 struct lec_priv *priv; 904 905 if (arg < 0) 906 i = 0; 907 else 908 i = arg; 909 #ifdef CONFIG_TR 910 if (arg >= MAX_LEC_ITF) 911 return -EINVAL; 912 #else /* Reserve the top NUM_TR_DEVS for TR */ 913 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) 914 return -EINVAL; 915 #endif 916 if (!dev_lec[i]) { 917 int is_trdev, size; 918 919 is_trdev = 0; 920 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) 921 is_trdev = 1; 922 923 size = sizeof(struct lec_priv); 924 #ifdef CONFIG_TR 925 if (is_trdev) 926 dev_lec[i] = alloc_trdev(size); 927 else 928 #endif 929 dev_lec[i] = alloc_etherdev(size); 930 if (!dev_lec[i]) 931 return -ENOMEM; 932 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 933 if (register_netdev(dev_lec[i])) { 934 free_netdev(dev_lec[i]); 935 return -EINVAL; 936 } 937 938 priv = dev_lec[i]->priv; 939 priv->is_trdev = is_trdev; 940 lec_init(dev_lec[i]); 941 } else { 942 priv = dev_lec[i]->priv; 943 if (priv->lecd) 944 return -EADDRINUSE; 945 } 946 lec_arp_init(priv); 947 priv->itfnum = i; /* LANE2 addition */ 948 priv->lecd = vcc; 949 vcc->dev = &lecatm_dev; 950 vcc_insert_socket(sk_atm(vcc)); 951 952 vcc->proto_data = dev_lec[i]; 953 set_bit(ATM_VF_META, &vcc->flags); 954 set_bit(ATM_VF_READY, &vcc->flags); 955 956 /* Set default values to these variables */ 957 priv->maximum_unknown_frame_count = 1; 958 priv->max_unknown_frame_time = (1 * HZ); 959 priv->vcc_timeout_period = (1200 * HZ); 960 priv->max_retry_count = 1; 961 priv->aging_time = (300 * HZ); 962 priv->forward_delay_time = (15 * HZ); 963 priv->topology_change = 0; 964 priv->arp_response_time = (1 * HZ); 965 priv->flush_timeout = (4 * HZ); 966 priv->path_switching_delay = (6 * HZ); 967 968 if (dev_lec[i]->flags & IFF_UP) { 969 netif_start_queue(dev_lec[i]); 970 } 971 __module_get(THIS_MODULE); 972 return i; 973 } 974 975 #ifdef CONFIG_PROC_FS 976 static char *lec_arp_get_status_string(unsigned char status) 977 { 978 static char *lec_arp_status_string[] = { 979 "ESI_UNKNOWN ", 980 "ESI_ARP_PENDING ", 981 "ESI_VC_PENDING ", 982 "<Undefined> ", 983 "ESI_FLUSH_PENDING ", 984 "ESI_FORWARD_DIRECT" 985 }; 986 987 if (status > ESI_FORWARD_DIRECT) 988 status = 3; /* ESI_UNDEFINED */ 989 return lec_arp_status_string[status]; 990 } 991 992 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 993 { 994 int i; 995 996 for (i = 0; i < ETH_ALEN; i++) 997 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 998 seq_printf(seq, " "); 999 for (i = 0; i < ATM_ESA_LEN; i++) 1000 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 1001 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 1002 entry->flags & 0xffff); 1003 if (entry->vcc) 1004 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 1005 else 1006 seq_printf(seq, " "); 1007 if (entry->recv_vcc) { 1008 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 1009 entry->recv_vcc->vci); 1010 } 1011 seq_putc(seq, '\n'); 1012 } 1013 1014 struct lec_state { 1015 unsigned long flags; 1016 struct lec_priv *locked; 1017 struct hlist_node *node; 1018 struct net_device *dev; 1019 int itf; 1020 int arp_table; 1021 int misc_table; 1022 }; 1023 1024 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 1025 loff_t *l) 1026 { 1027 struct hlist_node *e = state->node; 1028 struct lec_arp_table *tmp; 1029 1030 if (!e) 1031 e = tbl->first; 1032 if (e == (void *)1) { 1033 e = tbl->first; 1034 --*l; 1035 } 1036 1037 hlist_for_each_entry_from(tmp, e, next) { 1038 if (--*l < 0) 1039 break; 1040 } 1041 state->node = e; 1042 1043 return (*l < 0) ? state : NULL; 1044 } 1045 1046 static void *lec_arp_walk(struct lec_state *state, loff_t *l, 1047 struct lec_priv *priv) 1048 { 1049 void *v = NULL; 1050 int p; 1051 1052 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 1053 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 1054 if (v) 1055 break; 1056 } 1057 state->arp_table = p; 1058 return v; 1059 } 1060 1061 static void *lec_misc_walk(struct lec_state *state, loff_t *l, 1062 struct lec_priv *priv) 1063 { 1064 struct hlist_head *lec_misc_tables[] = { 1065 &priv->lec_arp_empty_ones, 1066 &priv->lec_no_forward, 1067 &priv->mcast_fwds 1068 }; 1069 void *v = NULL; 1070 int q; 1071 1072 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 1073 v = lec_tbl_walk(state, lec_misc_tables[q], l); 1074 if (v) 1075 break; 1076 } 1077 state->misc_table = q; 1078 return v; 1079 } 1080 1081 static void *lec_priv_walk(struct lec_state *state, loff_t *l, 1082 struct lec_priv *priv) 1083 { 1084 if (!state->locked) { 1085 state->locked = priv; 1086 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 1087 } 1088 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 1089 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 1090 state->locked = NULL; 1091 /* Partial state reset for the next time we get called */ 1092 state->arp_table = state->misc_table = 0; 1093 } 1094 return state->locked; 1095 } 1096 1097 static void *lec_itf_walk(struct lec_state *state, loff_t *l) 1098 { 1099 struct net_device *dev; 1100 void *v; 1101 1102 dev = state->dev ? state->dev : dev_lec[state->itf]; 1103 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; 1104 if (!v && dev) { 1105 dev_put(dev); 1106 /* Partial state reset for the next time we get called */ 1107 dev = NULL; 1108 } 1109 state->dev = dev; 1110 return v; 1111 } 1112 1113 static void *lec_get_idx(struct lec_state *state, loff_t l) 1114 { 1115 void *v = NULL; 1116 1117 for (; state->itf < MAX_LEC_ITF; state->itf++) { 1118 v = lec_itf_walk(state, &l); 1119 if (v) 1120 break; 1121 } 1122 return v; 1123 } 1124 1125 static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 1126 { 1127 struct lec_state *state = seq->private; 1128 1129 state->itf = 0; 1130 state->dev = NULL; 1131 state->locked = NULL; 1132 state->arp_table = 0; 1133 state->misc_table = 0; 1134 state->node = (void *)1; 1135 1136 return *pos ? lec_get_idx(state, *pos) : (void *)1; 1137 } 1138 1139 static void lec_seq_stop(struct seq_file *seq, void *v) 1140 { 1141 struct lec_state *state = seq->private; 1142 1143 if (state->dev) { 1144 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 1145 state->flags); 1146 dev_put(state->dev); 1147 } 1148 } 1149 1150 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 1151 { 1152 struct lec_state *state = seq->private; 1153 1154 v = lec_get_idx(state, 1); 1155 *pos += !!PTR_ERR(v); 1156 return v; 1157 } 1158 1159 static int lec_seq_show(struct seq_file *seq, void *v) 1160 { 1161 static char lec_banner[] = "Itf MAC ATM destination" 1162 " Status Flags " 1163 "VPI/VCI Recv VPI/VCI\n"; 1164 1165 if (v == (void *)1) 1166 seq_puts(seq, lec_banner); 1167 else { 1168 struct lec_state *state = seq->private; 1169 struct net_device *dev = state->dev; 1170 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); 1171 1172 seq_printf(seq, "%s ", dev->name); 1173 lec_info(seq, entry); 1174 } 1175 return 0; 1176 } 1177 1178 static struct seq_operations lec_seq_ops = { 1179 .start = lec_seq_start, 1180 .next = lec_seq_next, 1181 .stop = lec_seq_stop, 1182 .show = lec_seq_show, 1183 }; 1184 1185 static int lec_seq_open(struct inode *inode, struct file *file) 1186 { 1187 struct lec_state *state; 1188 struct seq_file *seq; 1189 int rc = -EAGAIN; 1190 1191 state = kmalloc(sizeof(*state), GFP_KERNEL); 1192 if (!state) { 1193 rc = -ENOMEM; 1194 goto out; 1195 } 1196 1197 rc = seq_open(file, &lec_seq_ops); 1198 if (rc) 1199 goto out_kfree; 1200 seq = file->private_data; 1201 seq->private = state; 1202 out: 1203 return rc; 1204 1205 out_kfree: 1206 kfree(state); 1207 goto out; 1208 } 1209 1210 static int lec_seq_release(struct inode *inode, struct file *file) 1211 { 1212 return seq_release_private(inode, file); 1213 } 1214 1215 static const struct file_operations lec_seq_fops = { 1216 .owner = THIS_MODULE, 1217 .open = lec_seq_open, 1218 .read = seq_read, 1219 .llseek = seq_lseek, 1220 .release = lec_seq_release, 1221 }; 1222 #endif 1223 1224 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1225 { 1226 struct atm_vcc *vcc = ATM_SD(sock); 1227 int err = 0; 1228 1229 switch (cmd) { 1230 case ATMLEC_CTRL: 1231 case ATMLEC_MCAST: 1232 case ATMLEC_DATA: 1233 if (!capable(CAP_NET_ADMIN)) 1234 return -EPERM; 1235 break; 1236 default: 1237 return -ENOIOCTLCMD; 1238 } 1239 1240 switch (cmd) { 1241 case ATMLEC_CTRL: 1242 err = lecd_attach(vcc, (int)arg); 1243 if (err >= 0) 1244 sock->state = SS_CONNECTED; 1245 break; 1246 case ATMLEC_MCAST: 1247 err = lec_mcast_attach(vcc, (int)arg); 1248 break; 1249 case ATMLEC_DATA: 1250 err = lec_vcc_attach(vcc, (void __user *)arg); 1251 break; 1252 } 1253 1254 return err; 1255 } 1256 1257 static struct atm_ioctl lane_ioctl_ops = { 1258 .owner = THIS_MODULE, 1259 .ioctl = lane_ioctl, 1260 }; 1261 1262 static int __init lane_module_init(void) 1263 { 1264 #ifdef CONFIG_PROC_FS 1265 struct proc_dir_entry *p; 1266 1267 p = create_proc_entry("lec", S_IRUGO, atm_proc_root); 1268 if (p) 1269 p->proc_fops = &lec_seq_fops; 1270 #endif 1271 1272 register_atm_ioctl(&lane_ioctl_ops); 1273 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); 1274 return 0; 1275 } 1276 1277 static void __exit lane_module_cleanup(void) 1278 { 1279 int i; 1280 struct lec_priv *priv; 1281 1282 remove_proc_entry("lec", atm_proc_root); 1283 1284 deregister_atm_ioctl(&lane_ioctl_ops); 1285 1286 for (i = 0; i < MAX_LEC_ITF; i++) { 1287 if (dev_lec[i] != NULL) { 1288 priv = (struct lec_priv *)dev_lec[i]->priv; 1289 unregister_netdev(dev_lec[i]); 1290 free_netdev(dev_lec[i]); 1291 dev_lec[i] = NULL; 1292 } 1293 } 1294 1295 return; 1296 } 1297 1298 module_init(lane_module_init); 1299 module_exit(lane_module_cleanup); 1300 1301 /* 1302 * LANE2: 3.1.3, LE_RESOLVE.request 1303 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1304 * If sizeoftlvs == NULL the default TLVs associated with with this 1305 * lec will be used. 1306 * If dst_mac == NULL, targetless LE_ARP will be sent 1307 */ 1308 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, 1309 u8 **tlvs, u32 *sizeoftlvs) 1310 { 1311 unsigned long flags; 1312 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1313 struct lec_arp_table *table; 1314 struct sk_buff *skb; 1315 int retval; 1316 1317 if (force == 0) { 1318 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1319 table = lec_arp_find(priv, dst_mac); 1320 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1321 if (table == NULL) 1322 return -1; 1323 1324 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1325 if (*tlvs == NULL) 1326 return -1; 1327 1328 *sizeoftlvs = table->sizeoftlvs; 1329 1330 return 0; 1331 } 1332 1333 if (sizeoftlvs == NULL) 1334 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1335 1336 else { 1337 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1338 if (skb == NULL) 1339 return -1; 1340 skb->len = *sizeoftlvs; 1341 memcpy(skb->data, *tlvs, *sizeoftlvs); 1342 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1343 } 1344 return retval; 1345 } 1346 1347 /* 1348 * LANE2: 3.1.4, LE_ASSOCIATE.request 1349 * Associate the *tlvs with the *lan_dst address. 1350 * Will overwrite any previous association 1351 * Returns 1 for success, 0 for failure (out of memory) 1352 * 1353 */ 1354 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst, 1355 u8 *tlvs, u32 sizeoftlvs) 1356 { 1357 int retval; 1358 struct sk_buff *skb; 1359 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1360 1361 if (compare_ether_addr(lan_dst, dev->dev_addr)) 1362 return (0); /* not our mac address */ 1363 1364 kfree(priv->tlvs); /* NULL if there was no previous association */ 1365 1366 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1367 if (priv->tlvs == NULL) 1368 return (0); 1369 priv->sizeoftlvs = sizeoftlvs; 1370 1371 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1372 if (skb == NULL) 1373 return 0; 1374 skb->len = sizeoftlvs; 1375 memcpy(skb->data, tlvs, sizeoftlvs); 1376 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1377 if (retval != 0) 1378 printk("lec.c: lane2_associate_req() failed\n"); 1379 /* 1380 * If the previous association has changed we must 1381 * somehow notify other LANE entities about the change 1382 */ 1383 return (1); 1384 } 1385 1386 /* 1387 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1388 * 1389 */ 1390 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr, 1391 u8 *tlvs, u32 sizeoftlvs) 1392 { 1393 #if 0 1394 int i = 0; 1395 #endif 1396 struct lec_priv *priv = (struct lec_priv *)dev->priv; 1397 #if 0 /* 1398 * Why have the TLVs in LE_ARP entries 1399 * since we do not use them? When you 1400 * uncomment this code, make sure the 1401 * TLVs get freed when entry is killed 1402 */ 1403 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1404 1405 if (entry == NULL) 1406 return; /* should not happen */ 1407 1408 kfree(entry->tlvs); 1409 1410 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1411 if (entry->tlvs == NULL) 1412 return; 1413 entry->sizeoftlvs = sizeoftlvs; 1414 #endif 1415 #if 0 1416 printk("lec.c: lane2_associate_ind()\n"); 1417 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1418 while (i < sizeoftlvs) 1419 printk("%02x ", tlvs[i++]); 1420 1421 printk("\n"); 1422 #endif 1423 1424 /* tell MPOA about the TLVs we saw */ 1425 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1426 priv->lane2_ops->associate_indicator(dev, mac_addr, 1427 tlvs, sizeoftlvs); 1428 } 1429 return; 1430 } 1431 1432 /* 1433 * Here starts what used to lec_arpc.c 1434 * 1435 * lec_arpc.c was added here when making 1436 * lane client modular. October 1997 1437 */ 1438 1439 #include <linux/types.h> 1440 #include <linux/timer.h> 1441 #include <asm/param.h> 1442 #include <asm/atomic.h> 1443 #include <linux/inetdevice.h> 1444 #include <net/route.h> 1445 1446 #if 0 1447 #define DPRINTK(format,args...) 1448 /* 1449 #define DPRINTK printk 1450 */ 1451 #endif 1452 #define DEBUG_ARP_TABLE 0 1453 1454 #define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1455 1456 static void lec_arp_check_expire(struct work_struct *work); 1457 static void lec_arp_expire_arp(unsigned long data); 1458 1459 /* 1460 * Arp table funcs 1461 */ 1462 1463 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) 1464 1465 /* 1466 * Initialization of arp-cache 1467 */ 1468 static void lec_arp_init(struct lec_priv *priv) 1469 { 1470 unsigned short i; 1471 1472 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1473 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1474 } 1475 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1476 INIT_HLIST_HEAD(&priv->lec_no_forward); 1477 INIT_HLIST_HEAD(&priv->mcast_fwds); 1478 spin_lock_init(&priv->lec_arp_lock); 1479 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1480 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1481 } 1482 1483 static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1484 { 1485 if (entry->vcc) { 1486 struct atm_vcc *vcc = entry->vcc; 1487 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1488 struct net_device *dev = (struct net_device *)vcc->proto_data; 1489 1490 vcc->pop = vpriv->old_pop; 1491 if (vpriv->xoff) 1492 netif_wake_queue(dev); 1493 kfree(vpriv); 1494 vcc->user_back = NULL; 1495 vcc->push = entry->old_push; 1496 vcc_release_async(vcc, -EPIPE); 1497 entry->vcc = NULL; 1498 } 1499 if (entry->recv_vcc) { 1500 entry->recv_vcc->push = entry->old_recv_push; 1501 vcc_release_async(entry->recv_vcc, -EPIPE); 1502 entry->recv_vcc = NULL; 1503 } 1504 } 1505 1506 /* 1507 * Insert entry to lec_arp_table 1508 * LANE2: Add to the end of the list to satisfy 8.1.13 1509 */ 1510 static inline void 1511 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1512 { 1513 struct hlist_head *tmp; 1514 1515 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1516 hlist_add_head(&entry->next, tmp); 1517 1518 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1519 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], 1520 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], 1521 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); 1522 } 1523 1524 /* 1525 * Remove entry from lec_arp_table 1526 */ 1527 static int 1528 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1529 { 1530 struct hlist_node *node; 1531 struct lec_arp_table *entry; 1532 int i, remove_vcc = 1; 1533 1534 if (!to_remove) { 1535 return -1; 1536 } 1537 1538 hlist_del(&to_remove->next); 1539 del_timer(&to_remove->timer); 1540 1541 /* If this is the only MAC connected to this VCC, also tear down the VCC */ 1542 if (to_remove->status >= ESI_FLUSH_PENDING) { 1543 /* 1544 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1545 */ 1546 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1547 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 1548 if (memcmp(to_remove->atm_addr, 1549 entry->atm_addr, ATM_ESA_LEN) == 0) { 1550 remove_vcc = 0; 1551 break; 1552 } 1553 } 1554 } 1555 if (remove_vcc) 1556 lec_arp_clear_vccs(to_remove); 1557 } 1558 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1559 1560 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1561 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], 1562 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], 1563 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); 1564 return 0; 1565 } 1566 1567 #if DEBUG_ARP_TABLE 1568 static char *get_status_string(unsigned char st) 1569 { 1570 switch (st) { 1571 case ESI_UNKNOWN: 1572 return "ESI_UNKNOWN"; 1573 case ESI_ARP_PENDING: 1574 return "ESI_ARP_PENDING"; 1575 case ESI_VC_PENDING: 1576 return "ESI_VC_PENDING"; 1577 case ESI_FLUSH_PENDING: 1578 return "ESI_FLUSH_PENDING"; 1579 case ESI_FORWARD_DIRECT: 1580 return "ESI_FORWARD_DIRECT"; 1581 default: 1582 return "<UNKNOWN>"; 1583 } 1584 } 1585 1586 static void dump_arp_table(struct lec_priv *priv) 1587 { 1588 struct hlist_node *node; 1589 struct lec_arp_table *rulla; 1590 char buf[256]; 1591 int i, j, offset; 1592 1593 printk("Dump %p:\n", priv); 1594 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1595 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { 1596 offset = 0; 1597 offset += sprintf(buf, "%d: %p\n", i, rulla); 1598 offset += sprintf(buf + offset, "Mac:"); 1599 for (j = 0; j < ETH_ALEN; j++) { 1600 offset += sprintf(buf + offset, 1601 "%2.2x ", 1602 rulla->mac_addr[j] & 0xff); 1603 } 1604 offset += sprintf(buf + offset, "Atm:"); 1605 for (j = 0; j < ATM_ESA_LEN; j++) { 1606 offset += sprintf(buf + offset, 1607 "%2.2x ", 1608 rulla->atm_addr[j] & 0xff); 1609 } 1610 offset += sprintf(buf + offset, 1611 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1612 rulla->vcc ? rulla->vcc->vpi : 0, 1613 rulla->vcc ? rulla->vcc->vci : 0, 1614 rulla->recv_vcc ? rulla->recv_vcc-> 1615 vpi : 0, 1616 rulla->recv_vcc ? rulla->recv_vcc-> 1617 vci : 0, rulla->last_used, 1618 rulla->timestamp, rulla->no_tries); 1619 offset += 1620 sprintf(buf + offset, 1621 "Flags:%x, Packets_flooded:%x, Status: %s ", 1622 rulla->flags, rulla->packets_flooded, 1623 get_status_string(rulla->status)); 1624 printk("%s\n", buf); 1625 } 1626 } 1627 1628 if (!hlist_empty(&priv->lec_no_forward)) 1629 printk("No forward\n"); 1630 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { 1631 offset = 0; 1632 offset += sprintf(buf + offset, "Mac:"); 1633 for (j = 0; j < ETH_ALEN; j++) { 1634 offset += sprintf(buf + offset, "%2.2x ", 1635 rulla->mac_addr[j] & 0xff); 1636 } 1637 offset += sprintf(buf + offset, "Atm:"); 1638 for (j = 0; j < ATM_ESA_LEN; j++) { 1639 offset += sprintf(buf + offset, "%2.2x ", 1640 rulla->atm_addr[j] & 0xff); 1641 } 1642 offset += sprintf(buf + offset, 1643 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1644 rulla->vcc ? rulla->vcc->vpi : 0, 1645 rulla->vcc ? rulla->vcc->vci : 0, 1646 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1647 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1648 rulla->last_used, 1649 rulla->timestamp, rulla->no_tries); 1650 offset += sprintf(buf + offset, 1651 "Flags:%x, Packets_flooded:%x, Status: %s ", 1652 rulla->flags, rulla->packets_flooded, 1653 get_status_string(rulla->status)); 1654 printk("%s\n", buf); 1655 } 1656 1657 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1658 printk("Empty ones\n"); 1659 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { 1660 offset = 0; 1661 offset += sprintf(buf + offset, "Mac:"); 1662 for (j = 0; j < ETH_ALEN; j++) { 1663 offset += sprintf(buf + offset, "%2.2x ", 1664 rulla->mac_addr[j] & 0xff); 1665 } 1666 offset += sprintf(buf + offset, "Atm:"); 1667 for (j = 0; j < ATM_ESA_LEN; j++) { 1668 offset += sprintf(buf + offset, "%2.2x ", 1669 rulla->atm_addr[j] & 0xff); 1670 } 1671 offset += sprintf(buf + offset, 1672 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1673 rulla->vcc ? rulla->vcc->vpi : 0, 1674 rulla->vcc ? rulla->vcc->vci : 0, 1675 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1676 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1677 rulla->last_used, 1678 rulla->timestamp, rulla->no_tries); 1679 offset += sprintf(buf + offset, 1680 "Flags:%x, Packets_flooded:%x, Status: %s ", 1681 rulla->flags, rulla->packets_flooded, 1682 get_status_string(rulla->status)); 1683 printk("%s", buf); 1684 } 1685 1686 if (!hlist_empty(&priv->mcast_fwds)) 1687 printk("Multicast Forward VCCs\n"); 1688 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { 1689 offset = 0; 1690 offset += sprintf(buf + offset, "Mac:"); 1691 for (j = 0; j < ETH_ALEN; j++) { 1692 offset += sprintf(buf + offset, "%2.2x ", 1693 rulla->mac_addr[j] & 0xff); 1694 } 1695 offset += sprintf(buf + offset, "Atm:"); 1696 for (j = 0; j < ATM_ESA_LEN; j++) { 1697 offset += sprintf(buf + offset, "%2.2x ", 1698 rulla->atm_addr[j] & 0xff); 1699 } 1700 offset += sprintf(buf + offset, 1701 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1702 rulla->vcc ? rulla->vcc->vpi : 0, 1703 rulla->vcc ? rulla->vcc->vci : 0, 1704 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1705 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1706 rulla->last_used, 1707 rulla->timestamp, rulla->no_tries); 1708 offset += sprintf(buf + offset, 1709 "Flags:%x, Packets_flooded:%x, Status: %s ", 1710 rulla->flags, rulla->packets_flooded, 1711 get_status_string(rulla->status)); 1712 printk("%s\n", buf); 1713 } 1714 1715 } 1716 #else 1717 #define dump_arp_table(priv) do { } while (0) 1718 #endif 1719 1720 /* 1721 * Destruction of arp-cache 1722 */ 1723 static void lec_arp_destroy(struct lec_priv *priv) 1724 { 1725 unsigned long flags; 1726 struct hlist_node *node, *next; 1727 struct lec_arp_table *entry; 1728 int i; 1729 1730 cancel_rearming_delayed_work(&priv->lec_arp_work); 1731 1732 /* 1733 * Remove all entries 1734 */ 1735 1736 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1737 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1738 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1739 lec_arp_remove(priv, entry); 1740 lec_arp_put(entry); 1741 } 1742 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1743 } 1744 1745 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 1746 del_timer_sync(&entry->timer); 1747 lec_arp_clear_vccs(entry); 1748 hlist_del(&entry->next); 1749 lec_arp_put(entry); 1750 } 1751 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1752 1753 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 1754 del_timer_sync(&entry->timer); 1755 lec_arp_clear_vccs(entry); 1756 hlist_del(&entry->next); 1757 lec_arp_put(entry); 1758 } 1759 INIT_HLIST_HEAD(&priv->lec_no_forward); 1760 1761 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 1762 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1763 lec_arp_clear_vccs(entry); 1764 hlist_del(&entry->next); 1765 lec_arp_put(entry); 1766 } 1767 INIT_HLIST_HEAD(&priv->mcast_fwds); 1768 priv->mcast_vcc = NULL; 1769 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1770 } 1771 1772 /* 1773 * Find entry by mac_address 1774 */ 1775 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1776 unsigned char *mac_addr) 1777 { 1778 struct hlist_node *node; 1779 struct hlist_head *head; 1780 struct lec_arp_table *entry; 1781 1782 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", 1783 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, 1784 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); 1785 1786 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1787 hlist_for_each_entry(entry, node, head, next) { 1788 if (!compare_ether_addr(mac_addr, entry->mac_addr)) { 1789 return entry; 1790 } 1791 } 1792 return NULL; 1793 } 1794 1795 static struct lec_arp_table *make_entry(struct lec_priv *priv, 1796 unsigned char *mac_addr) 1797 { 1798 struct lec_arp_table *to_return; 1799 1800 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1801 if (!to_return) { 1802 printk("LEC: Arp entry kmalloc failed\n"); 1803 return NULL; 1804 } 1805 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1806 INIT_HLIST_NODE(&to_return->next); 1807 init_timer(&to_return->timer); 1808 to_return->timer.function = lec_arp_expire_arp; 1809 to_return->timer.data = (unsigned long)to_return; 1810 to_return->last_used = jiffies; 1811 to_return->priv = priv; 1812 skb_queue_head_init(&to_return->tx_wait); 1813 atomic_set(&to_return->usage, 1); 1814 return to_return; 1815 } 1816 1817 /* Arp sent timer expired */ 1818 static void lec_arp_expire_arp(unsigned long data) 1819 { 1820 struct lec_arp_table *entry; 1821 1822 entry = (struct lec_arp_table *)data; 1823 1824 DPRINTK("lec_arp_expire_arp\n"); 1825 if (entry->status == ESI_ARP_PENDING) { 1826 if (entry->no_tries <= entry->priv->max_retry_count) { 1827 if (entry->is_rdesc) 1828 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1829 entry->mac_addr, NULL, NULL); 1830 else 1831 send_to_lecd(entry->priv, l_arp_xmt, 1832 entry->mac_addr, NULL, NULL); 1833 entry->no_tries++; 1834 } 1835 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1836 } 1837 } 1838 1839 /* Unknown/unused vcc expire, remove associated entry */ 1840 static void lec_arp_expire_vcc(unsigned long data) 1841 { 1842 unsigned long flags; 1843 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1844 struct lec_priv *priv = (struct lec_priv *)to_remove->priv; 1845 1846 del_timer(&to_remove->timer); 1847 1848 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", 1849 to_remove, priv, 1850 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1851 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1852 1853 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1854 hlist_del(&to_remove->next); 1855 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1856 1857 lec_arp_clear_vccs(to_remove); 1858 lec_arp_put(to_remove); 1859 } 1860 1861 /* 1862 * Expire entries. 1863 * 1. Re-set timer 1864 * 2. For each entry, delete entries that have aged past the age limit. 1865 * 3. For each entry, depending on the status of the entry, perform 1866 * the following maintenance. 1867 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1868 * tick_count is above the max_unknown_frame_time, clear 1869 * the tick_count to zero and clear the packets_flooded counter 1870 * to zero. This supports the packet rate limit per address 1871 * while flooding unknowns. 1872 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1873 * than or equal to the path_switching_delay, change the status 1874 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1875 * regardless of the progress of the flush protocol. 1876 */ 1877 static void lec_arp_check_expire(struct work_struct *work) 1878 { 1879 unsigned long flags; 1880 struct lec_priv *priv = 1881 container_of(work, struct lec_priv, lec_arp_work.work); 1882 struct hlist_node *node, *next; 1883 struct lec_arp_table *entry; 1884 unsigned long now; 1885 unsigned long time_to_check; 1886 int i; 1887 1888 DPRINTK("lec_arp_check_expire %p\n", priv); 1889 now = jiffies; 1890 restart: 1891 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1892 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1893 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 1894 if ((entry->flags) & LEC_REMOTE_FLAG && 1895 priv->topology_change) 1896 time_to_check = priv->forward_delay_time; 1897 else 1898 time_to_check = priv->aging_time; 1899 1900 DPRINTK("About to expire: %lx - %lx > %lx\n", 1901 now, entry->last_used, time_to_check); 1902 if (time_after(now, entry->last_used + time_to_check) 1903 && !(entry->flags & LEC_PERMANENT_FLAG) 1904 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1905 /* Remove entry */ 1906 DPRINTK("LEC:Entry timed out\n"); 1907 lec_arp_remove(priv, entry); 1908 lec_arp_put(entry); 1909 } else { 1910 /* Something else */ 1911 if ((entry->status == ESI_VC_PENDING || 1912 entry->status == ESI_ARP_PENDING) 1913 && time_after_eq(now, 1914 entry->timestamp + 1915 priv-> 1916 max_unknown_frame_time)) { 1917 entry->timestamp = jiffies; 1918 entry->packets_flooded = 0; 1919 if (entry->status == ESI_VC_PENDING) 1920 send_to_lecd(priv, l_svc_setup, 1921 entry->mac_addr, 1922 entry->atm_addr, 1923 NULL); 1924 } 1925 if (entry->status == ESI_FLUSH_PENDING 1926 && 1927 time_after_eq(now, entry->timestamp + 1928 priv->path_switching_delay)) { 1929 struct sk_buff *skb; 1930 struct atm_vcc *vcc = entry->vcc; 1931 1932 lec_arp_hold(entry); 1933 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1934 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 1935 lec_send(vcc, skb, entry->priv); 1936 entry->last_used = jiffies; 1937 entry->status = ESI_FORWARD_DIRECT; 1938 lec_arp_put(entry); 1939 goto restart; 1940 } 1941 } 1942 } 1943 } 1944 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1945 1946 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1947 } 1948 1949 /* 1950 * Try to find vcc where mac_address is attached. 1951 * 1952 */ 1953 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1954 unsigned char *mac_to_find, int is_rdesc, 1955 struct lec_arp_table **ret_entry) 1956 { 1957 unsigned long flags; 1958 struct lec_arp_table *entry; 1959 struct atm_vcc *found; 1960 1961 if (mac_to_find[0] & 0x01) { 1962 switch (priv->lane_version) { 1963 case 1: 1964 return priv->mcast_vcc; 1965 break; 1966 case 2: /* LANE2 wants arp for multicast addresses */ 1967 if (!compare_ether_addr(mac_to_find, bus_mac)) 1968 return priv->mcast_vcc; 1969 break; 1970 default: 1971 break; 1972 } 1973 } 1974 1975 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1976 entry = lec_arp_find(priv, mac_to_find); 1977 1978 if (entry) { 1979 if (entry->status == ESI_FORWARD_DIRECT) { 1980 /* Connection Ok */ 1981 entry->last_used = jiffies; 1982 lec_arp_hold(entry); 1983 *ret_entry = entry; 1984 found = entry->vcc; 1985 goto out; 1986 } 1987 /* 1988 * If the LE_ARP cache entry is still pending, reset count to 0 1989 * so another LE_ARP request can be made for this frame. 1990 */ 1991 if (entry->status == ESI_ARP_PENDING) { 1992 entry->no_tries = 0; 1993 } 1994 /* 1995 * Data direct VC not yet set up, check to see if the unknown 1996 * frame count is greater than the limit. If the limit has 1997 * not been reached, allow the caller to send packet to 1998 * BUS. 1999 */ 2000 if (entry->status != ESI_FLUSH_PENDING && 2001 entry->packets_flooded < 2002 priv->maximum_unknown_frame_count) { 2003 entry->packets_flooded++; 2004 DPRINTK("LEC_ARP: Flooding..\n"); 2005 found = priv->mcast_vcc; 2006 goto out; 2007 } 2008 /* 2009 * We got here because entry->status == ESI_FLUSH_PENDING 2010 * or BUS flood limit was reached for an entry which is 2011 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 2012 */ 2013 lec_arp_hold(entry); 2014 *ret_entry = entry; 2015 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, 2016 entry->vcc); 2017 found = NULL; 2018 } else { 2019 /* No matching entry was found */ 2020 entry = make_entry(priv, mac_to_find); 2021 DPRINTK("LEC_ARP: Making entry\n"); 2022 if (!entry) { 2023 found = priv->mcast_vcc; 2024 goto out; 2025 } 2026 lec_arp_add(priv, entry); 2027 /* We want arp-request(s) to be sent */ 2028 entry->packets_flooded = 1; 2029 entry->status = ESI_ARP_PENDING; 2030 entry->no_tries = 1; 2031 entry->last_used = entry->timestamp = jiffies; 2032 entry->is_rdesc = is_rdesc; 2033 if (entry->is_rdesc) 2034 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 2035 NULL); 2036 else 2037 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 2038 entry->timer.expires = jiffies + (1 * HZ); 2039 entry->timer.function = lec_arp_expire_arp; 2040 add_timer(&entry->timer); 2041 found = priv->mcast_vcc; 2042 } 2043 2044 out: 2045 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2046 return found; 2047 } 2048 2049 static int 2050 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, 2051 unsigned long permanent) 2052 { 2053 unsigned long flags; 2054 struct hlist_node *node, *next; 2055 struct lec_arp_table *entry; 2056 int i; 2057 2058 DPRINTK("lec_addr_delete\n"); 2059 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2060 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2061 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2062 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) 2063 && (permanent || 2064 !(entry->flags & LEC_PERMANENT_FLAG))) { 2065 lec_arp_remove(priv, entry); 2066 lec_arp_put(entry); 2067 } 2068 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2069 return 0; 2070 } 2071 } 2072 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2073 return -1; 2074 } 2075 2076 /* 2077 * Notifies: Response to arp_request (atm_addr != NULL) 2078 */ 2079 static void 2080 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, 2081 unsigned char *atm_addr, unsigned long remoteflag, 2082 unsigned int targetless_le_arp) 2083 { 2084 unsigned long flags; 2085 struct hlist_node *node, *next; 2086 struct lec_arp_table *entry, *tmp; 2087 int i; 2088 2089 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " "); 2090 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", 2091 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], 2092 mac_addr[4], mac_addr[5]); 2093 2094 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2095 entry = lec_arp_find(priv, mac_addr); 2096 if (entry == NULL && targetless_le_arp) 2097 goto out; /* 2098 * LANE2: ignore targetless LE_ARPs for which 2099 * we have no entry in the cache. 7.1.30 2100 */ 2101 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 2102 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2103 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 2104 hlist_del(&entry->next); 2105 del_timer(&entry->timer); 2106 tmp = lec_arp_find(priv, mac_addr); 2107 if (tmp) { 2108 del_timer(&tmp->timer); 2109 tmp->status = ESI_FORWARD_DIRECT; 2110 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 2111 tmp->vcc = entry->vcc; 2112 tmp->old_push = entry->old_push; 2113 tmp->last_used = jiffies; 2114 del_timer(&entry->timer); 2115 lec_arp_put(entry); 2116 entry = tmp; 2117 } else { 2118 entry->status = ESI_FORWARD_DIRECT; 2119 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 2120 entry->last_used = jiffies; 2121 lec_arp_add(priv, entry); 2122 } 2123 if (remoteflag) 2124 entry->flags |= LEC_REMOTE_FLAG; 2125 else 2126 entry->flags &= ~LEC_REMOTE_FLAG; 2127 DPRINTK("After update\n"); 2128 dump_arp_table(priv); 2129 goto out; 2130 } 2131 } 2132 } 2133 2134 entry = lec_arp_find(priv, mac_addr); 2135 if (!entry) { 2136 entry = make_entry(priv, mac_addr); 2137 if (!entry) 2138 goto out; 2139 entry->status = ESI_UNKNOWN; 2140 lec_arp_add(priv, entry); 2141 /* Temporary, changes before end of function */ 2142 } 2143 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 2144 del_timer(&entry->timer); 2145 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2146 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { 2147 if (entry != tmp && 2148 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 2149 /* Vcc to this host exists */ 2150 if (tmp->status > ESI_VC_PENDING) { 2151 /* 2152 * ESI_FLUSH_PENDING, 2153 * ESI_FORWARD_DIRECT 2154 */ 2155 entry->vcc = tmp->vcc; 2156 entry->old_push = tmp->old_push; 2157 } 2158 entry->status = tmp->status; 2159 break; 2160 } 2161 } 2162 } 2163 if (remoteflag) 2164 entry->flags |= LEC_REMOTE_FLAG; 2165 else 2166 entry->flags &= ~LEC_REMOTE_FLAG; 2167 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 2168 entry->status = ESI_VC_PENDING; 2169 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 2170 } 2171 DPRINTK("After update2\n"); 2172 dump_arp_table(priv); 2173 out: 2174 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2175 } 2176 2177 /* 2178 * Notifies: Vcc setup ready 2179 */ 2180 static void 2181 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, 2182 struct atm_vcc *vcc, 2183 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 2184 { 2185 unsigned long flags; 2186 struct hlist_node *node; 2187 struct lec_arp_table *entry; 2188 int i, found_entry = 0; 2189 2190 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2191 if (ioc_data->receive == 2) { 2192 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2193 2194 DPRINTK("LEC_ARP: Attaching mcast forward\n"); 2195 #if 0 2196 entry = lec_arp_find(priv, bus_mac); 2197 if (!entry) { 2198 printk("LEC_ARP: Multicast entry not found!\n"); 2199 goto out; 2200 } 2201 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2202 entry->recv_vcc = vcc; 2203 entry->old_recv_push = old_push; 2204 #endif 2205 entry = make_entry(priv, bus_mac); 2206 if (entry == NULL) 2207 goto out; 2208 del_timer(&entry->timer); 2209 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2210 entry->recv_vcc = vcc; 2211 entry->old_recv_push = old_push; 2212 hlist_add_head(&entry->next, &priv->mcast_fwds); 2213 goto out; 2214 } else if (ioc_data->receive == 1) { 2215 /* 2216 * Vcc which we don't want to make default vcc, 2217 * attach it anyway. 2218 */ 2219 DPRINTK 2220 ("LEC_ARP:Attaching data direct, not default: " 2221 "%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", 2222 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2223 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2224 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2225 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2226 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2227 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2228 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2229 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2230 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2231 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2232 entry = make_entry(priv, bus_mac); 2233 if (entry == NULL) 2234 goto out; 2235 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2236 memset(entry->mac_addr, 0, ETH_ALEN); 2237 entry->recv_vcc = vcc; 2238 entry->old_recv_push = old_push; 2239 entry->status = ESI_UNKNOWN; 2240 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2241 entry->timer.function = lec_arp_expire_vcc; 2242 hlist_add_head(&entry->next, &priv->lec_no_forward); 2243 add_timer(&entry->timer); 2244 dump_arp_table(priv); 2245 goto out; 2246 } 2247 DPRINTK 2248 ("LEC_ARP:Attaching data direct, default: " 2249 "%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", 2250 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2251 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2252 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2253 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2254 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2255 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2256 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2257 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2258 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2259 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2260 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2261 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2262 if (memcmp 2263 (ioc_data->atm_addr, entry->atm_addr, 2264 ATM_ESA_LEN) == 0) { 2265 DPRINTK("LEC_ARP: Attaching data direct\n"); 2266 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", 2267 entry->vcc ? entry->vcc->vci : 0, 2268 entry->recv_vcc ? entry->recv_vcc-> 2269 vci : 0); 2270 found_entry = 1; 2271 del_timer(&entry->timer); 2272 entry->vcc = vcc; 2273 entry->old_push = old_push; 2274 if (entry->status == ESI_VC_PENDING) { 2275 if (priv->maximum_unknown_frame_count 2276 == 0) 2277 entry->status = 2278 ESI_FORWARD_DIRECT; 2279 else { 2280 entry->timestamp = jiffies; 2281 entry->status = 2282 ESI_FLUSH_PENDING; 2283 #if 0 2284 send_to_lecd(priv, l_flush_xmt, 2285 NULL, 2286 entry->atm_addr, 2287 NULL); 2288 #endif 2289 } 2290 } else { 2291 /* 2292 * They were forming a connection 2293 * to us, and we to them. Our 2294 * ATM address is numerically lower 2295 * than theirs, so we make connection 2296 * we formed into default VCC (8.1.11). 2297 * Connection they made gets torn 2298 * down. This might confuse some 2299 * clients. Can be changed if 2300 * someone reports trouble... 2301 */ 2302 ; 2303 } 2304 } 2305 } 2306 } 2307 if (found_entry) { 2308 DPRINTK("After vcc was added\n"); 2309 dump_arp_table(priv); 2310 goto out; 2311 } 2312 /* 2313 * Not found, snatch address from first data packet that arrives 2314 * from this vcc 2315 */ 2316 entry = make_entry(priv, bus_mac); 2317 if (!entry) 2318 goto out; 2319 entry->vcc = vcc; 2320 entry->old_push = old_push; 2321 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2322 memset(entry->mac_addr, 0, ETH_ALEN); 2323 entry->status = ESI_UNKNOWN; 2324 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2325 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2326 entry->timer.function = lec_arp_expire_vcc; 2327 add_timer(&entry->timer); 2328 DPRINTK("After vcc was added\n"); 2329 dump_arp_table(priv); 2330 out: 2331 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2332 } 2333 2334 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2335 { 2336 unsigned long flags; 2337 struct hlist_node *node; 2338 struct lec_arp_table *entry; 2339 int i; 2340 2341 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id); 2342 restart: 2343 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2344 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2345 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2346 if (entry->flush_tran_id == tran_id 2347 && entry->status == ESI_FLUSH_PENDING) { 2348 struct sk_buff *skb; 2349 struct atm_vcc *vcc = entry->vcc; 2350 2351 lec_arp_hold(entry); 2352 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2353 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) 2354 lec_send(vcc, skb, entry->priv); 2355 entry->last_used = jiffies; 2356 entry->status = ESI_FORWARD_DIRECT; 2357 lec_arp_put(entry); 2358 DPRINTK("LEC_ARP: Flushed\n"); 2359 goto restart; 2360 } 2361 } 2362 } 2363 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2364 dump_arp_table(priv); 2365 } 2366 2367 static void 2368 lec_set_flush_tran_id(struct lec_priv *priv, 2369 unsigned char *atm_addr, unsigned long tran_id) 2370 { 2371 unsigned long flags; 2372 struct hlist_node *node; 2373 struct lec_arp_table *entry; 2374 int i; 2375 2376 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2377 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2378 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { 2379 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2380 entry->flush_tran_id = tran_id; 2381 DPRINTK("Set flush transaction id to %lx for %p\n", 2382 tran_id, entry); 2383 } 2384 } 2385 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2386 } 2387 2388 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2389 { 2390 unsigned long flags; 2391 unsigned char mac_addr[] = { 2392 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2393 }; 2394 struct lec_arp_table *to_add; 2395 struct lec_vcc_priv *vpriv; 2396 int err = 0; 2397 2398 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) 2399 return -ENOMEM; 2400 vpriv->xoff = 0; 2401 vpriv->old_pop = vcc->pop; 2402 vcc->user_back = vpriv; 2403 vcc->pop = lec_pop; 2404 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2405 to_add = make_entry(priv, mac_addr); 2406 if (!to_add) { 2407 vcc->pop = vpriv->old_pop; 2408 kfree(vpriv); 2409 err = -ENOMEM; 2410 goto out; 2411 } 2412 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2413 to_add->status = ESI_FORWARD_DIRECT; 2414 to_add->flags |= LEC_PERMANENT_FLAG; 2415 to_add->vcc = vcc; 2416 to_add->old_push = vcc->push; 2417 vcc->push = lec_push; 2418 priv->mcast_vcc = vcc; 2419 lec_arp_add(priv, to_add); 2420 out: 2421 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2422 return err; 2423 } 2424 2425 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2426 { 2427 unsigned long flags; 2428 struct hlist_node *node, *next; 2429 struct lec_arp_table *entry; 2430 int i; 2431 2432 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2433 dump_arp_table(priv); 2434 2435 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2436 2437 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2438 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { 2439 if (vcc == entry->vcc) { 2440 lec_arp_remove(priv, entry); 2441 lec_arp_put(entry); 2442 if (priv->mcast_vcc == vcc) { 2443 priv->mcast_vcc = NULL; 2444 } 2445 } 2446 } 2447 } 2448 2449 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2450 if (entry->vcc == vcc) { 2451 lec_arp_clear_vccs(entry); 2452 del_timer(&entry->timer); 2453 hlist_del(&entry->next); 2454 lec_arp_put(entry); 2455 } 2456 } 2457 2458 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { 2459 if (entry->recv_vcc == vcc) { 2460 lec_arp_clear_vccs(entry); 2461 del_timer(&entry->timer); 2462 hlist_del(&entry->next); 2463 lec_arp_put(entry); 2464 } 2465 } 2466 2467 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { 2468 if (entry->recv_vcc == vcc) { 2469 lec_arp_clear_vccs(entry); 2470 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2471 hlist_del(&entry->next); 2472 lec_arp_put(entry); 2473 } 2474 } 2475 2476 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2477 dump_arp_table(priv); 2478 } 2479 2480 static void 2481 lec_arp_check_empties(struct lec_priv *priv, 2482 struct atm_vcc *vcc, struct sk_buff *skb) 2483 { 2484 unsigned long flags; 2485 struct hlist_node *node, *next; 2486 struct lec_arp_table *entry, *tmp; 2487 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2488 unsigned char *src; 2489 #ifdef CONFIG_TR 2490 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; 2491 2492 if (priv->is_trdev) 2493 src = tr_hdr->h_source; 2494 else 2495 #endif 2496 src = hdr->h_source; 2497 2498 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2499 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { 2500 if (vcc == entry->vcc) { 2501 del_timer(&entry->timer); 2502 memcpy(entry->mac_addr, src, ETH_ALEN); 2503 entry->status = ESI_FORWARD_DIRECT; 2504 entry->last_used = jiffies; 2505 /* We might have got an entry */ 2506 if ((tmp = lec_arp_find(priv, src))) { 2507 lec_arp_remove(priv, tmp); 2508 lec_arp_put(tmp); 2509 } 2510 hlist_del(&entry->next); 2511 lec_arp_add(priv, entry); 2512 goto out; 2513 } 2514 } 2515 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); 2516 out: 2517 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2518 } 2519 2520 MODULE_LICENSE("GPL"); 2521