1/* 2 * lec.c: Lan Emulation driver 3 * 4 * Marko Kiiskila <mkiiskila@yahoo.com> 5 */ 6 7#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 8 9#include <linux/slab.h> 10#include <linux/kernel.h> 11#include <linux/bitops.h> 12#include <linux/capability.h> 13 14/* We are ethernet device */ 15#include <linux/if_ether.h> 16#include <linux/netdevice.h> 17#include <linux/etherdevice.h> 18#include <net/sock.h> 19#include <linux/skbuff.h> 20#include <linux/ip.h> 21#include <asm/byteorder.h> 22#include <linux/uaccess.h> 23#include <net/arp.h> 24#include <net/dst.h> 25#include <linux/proc_fs.h> 26#include <linux/spinlock.h> 27#include <linux/seq_file.h> 28 29/* And atm device */ 30#include <linux/atmdev.h> 31#include <linux/atmlec.h> 32 33/* Proxy LEC knows about bridging */ 34#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 35#include "../bridge/br_private.h" 36 37static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; 38#endif 39 40/* Modular too */ 41#include <linux/module.h> 42#include <linux/init.h> 43 44#include "lec.h" 45#include "lec_arpc.h" 46#include "resources.h" 47 48#define DUMP_PACKETS 0 /* 49 * 0 = None, 50 * 1 = 30 first bytes 51 * 2 = Whole packet 52 */ 53 54#define LEC_UNRES_QUE_LEN 8 /* 55 * number of tx packets to queue for a 56 * single destination while waiting for SVC 57 */ 58 59static int lec_open(struct net_device *dev); 60static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 61 struct net_device *dev); 62static int lec_close(struct net_device *dev); 63static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 64 const unsigned char *mac_addr); 65static int lec_arp_remove(struct lec_priv *priv, 66 struct lec_arp_table *to_remove); 67/* LANE2 functions */ 68static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, 69 const u8 *tlvs, u32 sizeoftlvs); 70static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, 71 u8 **tlvs, u32 *sizeoftlvs); 72static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, 73 const u8 *tlvs, u32 sizeoftlvs); 74 75static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, 76 unsigned long permanent); 77static void lec_arp_check_empties(struct lec_priv *priv, 78 struct atm_vcc *vcc, struct sk_buff *skb); 79static void lec_arp_destroy(struct lec_priv *priv); 80static void lec_arp_init(struct lec_priv *priv); 81static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 82 const unsigned char *mac_to_find, 83 int is_rdesc, 84 struct lec_arp_table **ret_entry); 85static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, 86 const unsigned char *atm_addr, 87 unsigned long remoteflag, 88 unsigned int targetless_le_arp); 89static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); 90static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); 91static void lec_set_flush_tran_id(struct lec_priv *priv, 92 const unsigned char *atm_addr, 93 unsigned long tran_id); 94static void lec_vcc_added(struct lec_priv *priv, 95 const struct atmlec_ioc *ioc_data, 96 struct atm_vcc *vcc, 97 void (*old_push)(struct atm_vcc *vcc, 98 struct sk_buff *skb)); 99static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); 100 101/* must be done under lec_arp_lock */ 102static inline void lec_arp_hold(struct lec_arp_table *entry) 103{ 104 atomic_inc(&entry->usage); 105} 106 107static inline void lec_arp_put(struct lec_arp_table *entry) 108{ 109 if (atomic_dec_and_test(&entry->usage)) 110 kfree(entry); 111} 112 113static struct lane2_ops lane2_ops = { 114 lane2_resolve, /* resolve, spec 3.1.3 */ 115 lane2_associate_req, /* associate_req, spec 3.1.4 */ 116 NULL /* associate indicator, spec 3.1.5 */ 117}; 118 119static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 120 121/* Device structures */ 122static struct net_device *dev_lec[MAX_LEC_ITF]; 123 124#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 125static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) 126{ 127 char *buff; 128 struct lec_priv *priv; 129 130 /* 131 * Check if this is a BPDU. If so, ask zeppelin to send 132 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit 133 * as the Config BPDU has 134 */ 135 buff = skb->data + skb->dev->hard_header_len; 136 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { 137 struct sock *sk; 138 struct sk_buff *skb2; 139 struct atmlec_msg *mesg; 140 141 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 142 if (skb2 == NULL) 143 return; 144 skb2->len = sizeof(struct atmlec_msg); 145 mesg = (struct atmlec_msg *)skb2->data; 146 mesg->type = l_topology_change; 147 buff += 4; 148 mesg->content.normal.flag = *buff & 0x01; 149 /* 0x01 is topology change */ 150 151 priv = netdev_priv(dev); 152 atm_force_charge(priv->lecd, skb2->truesize); 153 sk = sk_atm(priv->lecd); 154 skb_queue_tail(&sk->sk_receive_queue, skb2); 155 sk->sk_data_ready(sk, skb2->len); 156 } 157} 158#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 159 160/* 161 * Open/initialize the netdevice. This is called (in the current kernel) 162 * sometime after booting when the 'ifconfig' program is run. 163 * 164 * This routine should set everything up anew at each open, even 165 * registers that "should" only need to be set once at boot, so that 166 * there is non-reboot way to recover if something goes wrong. 167 */ 168 169static int lec_open(struct net_device *dev) 170{ 171 netif_start_queue(dev); 172 173 return 0; 174} 175 176static void 177lec_send(struct atm_vcc *vcc, struct sk_buff *skb) 178{ 179 struct net_device *dev = skb->dev; 180 181 ATM_SKB(skb)->vcc = vcc; 182 ATM_SKB(skb)->atm_options = vcc->atm_options; 183 184 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 185 if (vcc->send(vcc, skb) < 0) { 186 dev->stats.tx_dropped++; 187 return; 188 } 189 190 dev->stats.tx_packets++; 191 dev->stats.tx_bytes += skb->len; 192} 193 194static void lec_tx_timeout(struct net_device *dev) 195{ 196 pr_info("%s\n", dev->name); 197 dev->trans_start = jiffies; 198 netif_wake_queue(dev); 199} 200 201static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 202 struct net_device *dev) 203{ 204 struct sk_buff *skb2; 205 struct lec_priv *priv = netdev_priv(dev); 206 struct lecdatahdr_8023 *lec_h; 207 struct atm_vcc *vcc; 208 struct lec_arp_table *entry; 209 unsigned char *dst; 210 int min_frame_size; 211 int is_rdesc; 212 213 pr_debug("called\n"); 214 if (!priv->lecd) { 215 pr_info("%s:No lecd attached\n", dev->name); 216 dev->stats.tx_errors++; 217 netif_stop_queue(dev); 218 kfree_skb(skb); 219 return NETDEV_TX_OK; 220 } 221 222 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", 223 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), 224 (long)skb_end_pointer(skb)); 225#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 226 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) 227 lec_handle_bridge(skb, dev); 228#endif 229 230 /* Make sure we have room for lec_id */ 231 if (skb_headroom(skb) < 2) { 232 pr_debug("reallocating skb\n"); 233 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); 234 if (unlikely(!skb2)) { 235 kfree_skb(skb); 236 return NETDEV_TX_OK; 237 } 238 consume_skb(skb); 239 skb = skb2; 240 } 241 skb_push(skb, 2); 242 243 /* Put le header to place */ 244 lec_h = (struct lecdatahdr_8023 *)skb->data; 245 lec_h->le_header = htons(priv->lecid); 246 247#if DUMP_PACKETS >= 2 248#define MAX_DUMP_SKB 99 249#elif DUMP_PACKETS >= 1 250#define MAX_DUMP_SKB 30 251#endif 252#if DUMP_PACKETS >= 1 253 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", 254 dev->name, skb->len, priv->lecid); 255 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, 256 skb->data, min(skb->len, MAX_DUMP_SKB), true); 257#endif /* DUMP_PACKETS >= 1 */ 258 259 /* Minimum ethernet-frame size */ 260 min_frame_size = LEC_MINIMUM_8023_SIZE; 261 if (skb->len < min_frame_size) { 262 if ((skb->len + skb_tailroom(skb)) < min_frame_size) { 263 skb2 = skb_copy_expand(skb, 0, 264 min_frame_size - skb->truesize, 265 GFP_ATOMIC); 266 dev_kfree_skb(skb); 267 if (skb2 == NULL) { 268 dev->stats.tx_dropped++; 269 return NETDEV_TX_OK; 270 } 271 skb = skb2; 272 } 273 skb_put(skb, min_frame_size - skb->len); 274 } 275 276 /* Send to right vcc */ 277 is_rdesc = 0; 278 dst = lec_h->h_dest; 279 entry = NULL; 280 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); 281 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", 282 dev->name, vcc, vcc ? vcc->flags : 0, entry); 283 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { 284 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { 285 pr_debug("%s:queuing packet, MAC address %pM\n", 286 dev->name, lec_h->h_dest); 287 skb_queue_tail(&entry->tx_wait, skb); 288 } else { 289 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", 290 dev->name, lec_h->h_dest); 291 dev->stats.tx_dropped++; 292 dev_kfree_skb(skb); 293 } 294 goto out; 295 } 296#if DUMP_PACKETS > 0 297 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", 298 dev->name, vcc->vpi, vcc->vci); 299#endif /* DUMP_PACKETS > 0 */ 300 301 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { 302 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); 303 lec_send(vcc, skb2); 304 } 305 306 lec_send(vcc, skb); 307 308 if (!atm_may_send(vcc, 0)) { 309 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 310 311 vpriv->xoff = 1; 312 netif_stop_queue(dev); 313 314 /* 315 * vcc->pop() might have occurred in between, making 316 * the vcc usuable again. Since xmit is serialized, 317 * this is the only situation we have to re-test. 318 */ 319 320 if (atm_may_send(vcc, 0)) 321 netif_wake_queue(dev); 322 } 323 324out: 325 if (entry) 326 lec_arp_put(entry); 327 dev->trans_start = jiffies; 328 return NETDEV_TX_OK; 329} 330 331/* The inverse routine to net_open(). */ 332static int lec_close(struct net_device *dev) 333{ 334 netif_stop_queue(dev); 335 return 0; 336} 337 338static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) 339{ 340 unsigned long flags; 341 struct net_device *dev = (struct net_device *)vcc->proto_data; 342 struct lec_priv *priv = netdev_priv(dev); 343 struct atmlec_msg *mesg; 344 struct lec_arp_table *entry; 345 int i; 346 char *tmp; /* FIXME */ 347 348 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 349 mesg = (struct atmlec_msg *)skb->data; 350 tmp = skb->data; 351 tmp += sizeof(struct atmlec_msg); 352 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); 353 switch (mesg->type) { 354 case l_set_mac_addr: 355 for (i = 0; i < 6; i++) 356 dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; 357 break; 358 case l_del_mac_addr: 359 for (i = 0; i < 6; i++) 360 dev->dev_addr[i] = 0; 361 break; 362 case l_addr_delete: 363 lec_addr_delete(priv, mesg->content.normal.atm_addr, 364 mesg->content.normal.flag); 365 break; 366 case l_topology_change: 367 priv->topology_change = mesg->content.normal.flag; 368 break; 369 case l_flush_complete: 370 lec_flush_complete(priv, mesg->content.normal.flag); 371 break; 372 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ 373 spin_lock_irqsave(&priv->lec_arp_lock, flags); 374 entry = lec_arp_find(priv, mesg->content.normal.mac_addr); 375 lec_arp_remove(priv, entry); 376 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 377 378 if (mesg->content.normal.no_source_le_narp) 379 break; 380 /* FALL THROUGH */ 381 case l_arp_update: 382 lec_arp_update(priv, mesg->content.normal.mac_addr, 383 mesg->content.normal.atm_addr, 384 mesg->content.normal.flag, 385 mesg->content.normal.targetless_le_arp); 386 pr_debug("in l_arp_update\n"); 387 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ 388 pr_debug("LANE2 3.1.5, got tlvs, size %d\n", 389 mesg->sizeoftlvs); 390 lane2_associate_ind(dev, mesg->content.normal.mac_addr, 391 tmp, mesg->sizeoftlvs); 392 } 393 break; 394 case l_config: 395 priv->maximum_unknown_frame_count = 396 mesg->content.config.maximum_unknown_frame_count; 397 priv->max_unknown_frame_time = 398 (mesg->content.config.max_unknown_frame_time * HZ); 399 priv->max_retry_count = mesg->content.config.max_retry_count; 400 priv->aging_time = (mesg->content.config.aging_time * HZ); 401 priv->forward_delay_time = 402 (mesg->content.config.forward_delay_time * HZ); 403 priv->arp_response_time = 404 (mesg->content.config.arp_response_time * HZ); 405 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); 406 priv->path_switching_delay = 407 (mesg->content.config.path_switching_delay * HZ); 408 priv->lane_version = mesg->content.config.lane_version; 409 /* LANE2 */ 410 priv->lane2_ops = NULL; 411 if (priv->lane_version > 1) 412 priv->lane2_ops = &lane2_ops; 413 if (dev_set_mtu(dev, mesg->content.config.mtu)) 414 pr_info("%s: change_mtu to %d failed\n", 415 dev->name, mesg->content.config.mtu); 416 priv->is_proxy = mesg->content.config.is_proxy; 417 break; 418 case l_flush_tran_id: 419 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, 420 mesg->content.normal.flag); 421 break; 422 case l_set_lecid: 423 priv->lecid = 424 (unsigned short)(0xffff & mesg->content.normal.flag); 425 break; 426 case l_should_bridge: 427#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) 428 { 429 pr_debug("%s: bridge zeppelin asks about %pM\n", 430 dev->name, mesg->content.proxy.mac_addr); 431 432 if (br_fdb_test_addr_hook == NULL) 433 break; 434 435 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { 436 /* hit from bridge table, send LE_ARP_RESPONSE */ 437 struct sk_buff *skb2; 438 struct sock *sk; 439 440 pr_debug("%s: entry found, responding to zeppelin\n", 441 dev->name); 442 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 443 if (skb2 == NULL) 444 break; 445 skb2->len = sizeof(struct atmlec_msg); 446 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); 447 atm_force_charge(priv->lecd, skb2->truesize); 448 sk = sk_atm(priv->lecd); 449 skb_queue_tail(&sk->sk_receive_queue, skb2); 450 sk->sk_data_ready(sk, skb2->len); 451 } 452 } 453#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ 454 break; 455 default: 456 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); 457 dev_kfree_skb(skb); 458 return -EINVAL; 459 } 460 dev_kfree_skb(skb); 461 return 0; 462} 463 464static void lec_atm_close(struct atm_vcc *vcc) 465{ 466 struct sk_buff *skb; 467 struct net_device *dev = (struct net_device *)vcc->proto_data; 468 struct lec_priv *priv = netdev_priv(dev); 469 470 priv->lecd = NULL; 471 /* Do something needful? */ 472 473 netif_stop_queue(dev); 474 lec_arp_destroy(priv); 475 476 if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) 477 pr_info("%s closing with messages pending\n", dev->name); 478 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { 479 atm_return(vcc, skb->truesize); 480 dev_kfree_skb(skb); 481 } 482 483 pr_info("%s: Shut down!\n", dev->name); 484 module_put(THIS_MODULE); 485} 486 487static struct atmdev_ops lecdev_ops = { 488 .close = lec_atm_close, 489 .send = lec_atm_send 490}; 491 492static struct atm_dev lecatm_dev = { 493 .ops = &lecdev_ops, 494 .type = "lec", 495 .number = 999, /* dummy device number */ 496 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) 497}; 498 499/* 500 * LANE2: new argument struct sk_buff *data contains 501 * the LE_ARP based TLVs introduced in the LANE2 spec 502 */ 503static int 504send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, 505 const unsigned char *mac_addr, const unsigned char *atm_addr, 506 struct sk_buff *data) 507{ 508 struct sock *sk; 509 struct sk_buff *skb; 510 struct atmlec_msg *mesg; 511 512 if (!priv || !priv->lecd) 513 return -1; 514 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); 515 if (!skb) 516 return -1; 517 skb->len = sizeof(struct atmlec_msg); 518 mesg = (struct atmlec_msg *)skb->data; 519 memset(mesg, 0, sizeof(struct atmlec_msg)); 520 mesg->type = type; 521 if (data != NULL) 522 mesg->sizeoftlvs = data->len; 523 if (mac_addr) 524 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); 525 else 526 mesg->content.normal.targetless_le_arp = 1; 527 if (atm_addr) 528 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); 529 530 atm_force_charge(priv->lecd, skb->truesize); 531 sk = sk_atm(priv->lecd); 532 skb_queue_tail(&sk->sk_receive_queue, skb); 533 sk->sk_data_ready(sk, skb->len); 534 535 if (data != NULL) { 536 pr_debug("about to send %d bytes of data\n", data->len); 537 atm_force_charge(priv->lecd, data->truesize); 538 skb_queue_tail(&sk->sk_receive_queue, data); 539 sk->sk_data_ready(sk, skb->len); 540 } 541 542 return 0; 543} 544 545/* shamelessly stolen from drivers/net/net_init.c */ 546static int lec_change_mtu(struct net_device *dev, int new_mtu) 547{ 548 if ((new_mtu < 68) || (new_mtu > 18190)) 549 return -EINVAL; 550 dev->mtu = new_mtu; 551 return 0; 552} 553 554static void lec_set_multicast_list(struct net_device *dev) 555{ 556 /* 557 * by default, all multicast frames arrive over the bus. 558 * eventually support selective multicast service 559 */ 560} 561 562static const struct net_device_ops lec_netdev_ops = { 563 .ndo_open = lec_open, 564 .ndo_stop = lec_close, 565 .ndo_start_xmit = lec_start_xmit, 566 .ndo_change_mtu = lec_change_mtu, 567 .ndo_tx_timeout = lec_tx_timeout, 568 .ndo_set_rx_mode = lec_set_multicast_list, 569}; 570 571static const unsigned char lec_ctrl_magic[] = { 572 0xff, 573 0x00, 574 0x01, 575 0x01 576}; 577 578#define LEC_DATA_DIRECT_8023 2 579#define LEC_DATA_DIRECT_8025 3 580 581static int lec_is_data_direct(struct atm_vcc *vcc) 582{ 583 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || 584 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); 585} 586 587static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 588{ 589 unsigned long flags; 590 struct net_device *dev = (struct net_device *)vcc->proto_data; 591 struct lec_priv *priv = netdev_priv(dev); 592 593#if DUMP_PACKETS > 0 594 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", 595 dev->name, vcc->vpi, vcc->vci); 596#endif 597 if (!skb) { 598 pr_debug("%s: null skb\n", dev->name); 599 lec_vcc_close(priv, vcc); 600 return; 601 } 602#if DUMP_PACKETS >= 2 603#define MAX_SKB_DUMP 99 604#elif DUMP_PACKETS >= 1 605#define MAX_SKB_DUMP 30 606#endif 607#if DUMP_PACKETS > 0 608 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", 609 dev->name, skb->len, priv->lecid); 610 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, 611 skb->data, min(MAX_SKB_DUMP, skb->len), true); 612#endif /* DUMP_PACKETS > 0 */ 613 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { 614 /* Control frame, to daemon */ 615 struct sock *sk = sk_atm(vcc); 616 617 pr_debug("%s: To daemon\n", dev->name); 618 skb_queue_tail(&sk->sk_receive_queue, skb); 619 sk->sk_data_ready(sk, skb->len); 620 } else { /* Data frame, queue to protocol handlers */ 621 struct lec_arp_table *entry; 622 unsigned char *src, *dst; 623 624 atm_return(vcc, skb->truesize); 625 if (*(__be16 *) skb->data == htons(priv->lecid) || 626 !priv->lecd || !(dev->flags & IFF_UP)) { 627 /* 628 * Probably looping back, or if lecd is missing, 629 * lecd has gone down 630 */ 631 pr_debug("Ignoring frame...\n"); 632 dev_kfree_skb(skb); 633 return; 634 } 635 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; 636 637 /* 638 * If this is a Data Direct VCC, and the VCC does not match 639 * the LE_ARP cache entry, delete the LE_ARP cache entry. 640 */ 641 spin_lock_irqsave(&priv->lec_arp_lock, flags); 642 if (lec_is_data_direct(vcc)) { 643 src = ((struct lecdatahdr_8023 *)skb->data)->h_source; 644 entry = lec_arp_find(priv, src); 645 if (entry && entry->vcc != vcc) { 646 lec_arp_remove(priv, entry); 647 lec_arp_put(entry); 648 } 649 } 650 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 651 652 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ 653 !priv->is_proxy && /* Proxy wants all the packets */ 654 memcmp(dst, dev->dev_addr, dev->addr_len)) { 655 dev_kfree_skb(skb); 656 return; 657 } 658 if (!hlist_empty(&priv->lec_arp_empty_ones)) 659 lec_arp_check_empties(priv, vcc, skb); 660 skb_pull(skb, 2); /* skip lec_id */ 661 skb->protocol = eth_type_trans(skb, dev); 662 dev->stats.rx_packets++; 663 dev->stats.rx_bytes += skb->len; 664 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); 665 netif_rx(skb); 666 } 667} 668 669static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) 670{ 671 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 672 struct net_device *dev = skb->dev; 673 674 if (vpriv == NULL) { 675 pr_info("vpriv = NULL!?!?!?\n"); 676 return; 677 } 678 679 vpriv->old_pop(vcc, skb); 680 681 if (vpriv->xoff && atm_may_send(vcc, 0)) { 682 vpriv->xoff = 0; 683 if (netif_running(dev) && netif_queue_stopped(dev)) 684 netif_wake_queue(dev); 685 } 686} 687 688static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) 689{ 690 struct lec_vcc_priv *vpriv; 691 int bytes_left; 692 struct atmlec_ioc ioc_data; 693 694 /* Lecd must be up in this case */ 695 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); 696 if (bytes_left != 0) 697 pr_info("copy from user failed for %d bytes\n", bytes_left); 698 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || 699 !dev_lec[ioc_data.dev_num]) 700 return -EINVAL; 701 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); 702 if (!vpriv) 703 return -ENOMEM; 704 vpriv->xoff = 0; 705 vpriv->old_pop = vcc->pop; 706 vcc->user_back = vpriv; 707 vcc->pop = lec_pop; 708 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), 709 &ioc_data, vcc, vcc->push); 710 vcc->proto_data = dev_lec[ioc_data.dev_num]; 711 vcc->push = lec_push; 712 return 0; 713} 714 715static int lec_mcast_attach(struct atm_vcc *vcc, int arg) 716{ 717 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) 718 return -EINVAL; 719 vcc->proto_data = dev_lec[arg]; 720 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); 721} 722 723/* Initialize device. */ 724static int lecd_attach(struct atm_vcc *vcc, int arg) 725{ 726 int i; 727 struct lec_priv *priv; 728 729 if (arg < 0) 730 i = 0; 731 else 732 i = arg; 733 if (arg >= MAX_LEC_ITF) 734 return -EINVAL; 735 if (!dev_lec[i]) { 736 int size; 737 738 size = sizeof(struct lec_priv); 739 dev_lec[i] = alloc_etherdev(size); 740 if (!dev_lec[i]) 741 return -ENOMEM; 742 dev_lec[i]->netdev_ops = &lec_netdev_ops; 743 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); 744 if (register_netdev(dev_lec[i])) { 745 free_netdev(dev_lec[i]); 746 return -EINVAL; 747 } 748 749 priv = netdev_priv(dev_lec[i]); 750 } else { 751 priv = netdev_priv(dev_lec[i]); 752 if (priv->lecd) 753 return -EADDRINUSE; 754 } 755 lec_arp_init(priv); 756 priv->itfnum = i; /* LANE2 addition */ 757 priv->lecd = vcc; 758 vcc->dev = &lecatm_dev; 759 vcc_insert_socket(sk_atm(vcc)); 760 761 vcc->proto_data = dev_lec[i]; 762 set_bit(ATM_VF_META, &vcc->flags); 763 set_bit(ATM_VF_READY, &vcc->flags); 764 765 /* Set default values to these variables */ 766 priv->maximum_unknown_frame_count = 1; 767 priv->max_unknown_frame_time = (1 * HZ); 768 priv->vcc_timeout_period = (1200 * HZ); 769 priv->max_retry_count = 1; 770 priv->aging_time = (300 * HZ); 771 priv->forward_delay_time = (15 * HZ); 772 priv->topology_change = 0; 773 priv->arp_response_time = (1 * HZ); 774 priv->flush_timeout = (4 * HZ); 775 priv->path_switching_delay = (6 * HZ); 776 777 if (dev_lec[i]->flags & IFF_UP) 778 netif_start_queue(dev_lec[i]); 779 __module_get(THIS_MODULE); 780 return i; 781} 782 783#ifdef CONFIG_PROC_FS 784static const char *lec_arp_get_status_string(unsigned char status) 785{ 786 static const char *const lec_arp_status_string[] = { 787 "ESI_UNKNOWN ", 788 "ESI_ARP_PENDING ", 789 "ESI_VC_PENDING ", 790 "<Undefined> ", 791 "ESI_FLUSH_PENDING ", 792 "ESI_FORWARD_DIRECT" 793 }; 794 795 if (status > ESI_FORWARD_DIRECT) 796 status = 3; /* ESI_UNDEFINED */ 797 return lec_arp_status_string[status]; 798} 799 800static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) 801{ 802 int i; 803 804 for (i = 0; i < ETH_ALEN; i++) 805 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); 806 seq_printf(seq, " "); 807 for (i = 0; i < ATM_ESA_LEN; i++) 808 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); 809 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), 810 entry->flags & 0xffff); 811 if (entry->vcc) 812 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); 813 else 814 seq_printf(seq, " "); 815 if (entry->recv_vcc) { 816 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, 817 entry->recv_vcc->vci); 818 } 819 seq_putc(seq, '\n'); 820} 821 822struct lec_state { 823 unsigned long flags; 824 struct lec_priv *locked; 825 struct hlist_node *node; 826 struct net_device *dev; 827 int itf; 828 int arp_table; 829 int misc_table; 830}; 831 832static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, 833 loff_t *l) 834{ 835 struct hlist_node *e = state->node; 836 struct lec_arp_table *tmp; 837 838 if (!e) 839 e = tbl->first; 840 if (e == SEQ_START_TOKEN) { 841 e = tbl->first; 842 --*l; 843 } 844 845 tmp = container_of(e, struct lec_arp_table, next); 846 847 hlist_for_each_entry_from(tmp, next) { 848 if (--*l < 0) 849 break; 850 } 851 state->node = e; 852 853 return (*l < 0) ? state : NULL; 854} 855 856static void *lec_arp_walk(struct lec_state *state, loff_t *l, 857 struct lec_priv *priv) 858{ 859 void *v = NULL; 860 int p; 861 862 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { 863 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); 864 if (v) 865 break; 866 } 867 state->arp_table = p; 868 return v; 869} 870 871static void *lec_misc_walk(struct lec_state *state, loff_t *l, 872 struct lec_priv *priv) 873{ 874 struct hlist_head *lec_misc_tables[] = { 875 &priv->lec_arp_empty_ones, 876 &priv->lec_no_forward, 877 &priv->mcast_fwds 878 }; 879 void *v = NULL; 880 int q; 881 882 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { 883 v = lec_tbl_walk(state, lec_misc_tables[q], l); 884 if (v) 885 break; 886 } 887 state->misc_table = q; 888 return v; 889} 890 891static void *lec_priv_walk(struct lec_state *state, loff_t *l, 892 struct lec_priv *priv) 893{ 894 if (!state->locked) { 895 state->locked = priv; 896 spin_lock_irqsave(&priv->lec_arp_lock, state->flags); 897 } 898 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { 899 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); 900 state->locked = NULL; 901 /* Partial state reset for the next time we get called */ 902 state->arp_table = state->misc_table = 0; 903 } 904 return state->locked; 905} 906 907static void *lec_itf_walk(struct lec_state *state, loff_t *l) 908{ 909 struct net_device *dev; 910 void *v; 911 912 dev = state->dev ? state->dev : dev_lec[state->itf]; 913 v = (dev && netdev_priv(dev)) ? 914 lec_priv_walk(state, l, netdev_priv(dev)) : NULL; 915 if (!v && dev) { 916 dev_put(dev); 917 /* Partial state reset for the next time we get called */ 918 dev = NULL; 919 } 920 state->dev = dev; 921 return v; 922} 923 924static void *lec_get_idx(struct lec_state *state, loff_t l) 925{ 926 void *v = NULL; 927 928 for (; state->itf < MAX_LEC_ITF; state->itf++) { 929 v = lec_itf_walk(state, &l); 930 if (v) 931 break; 932 } 933 return v; 934} 935 936static void *lec_seq_start(struct seq_file *seq, loff_t *pos) 937{ 938 struct lec_state *state = seq->private; 939 940 state->itf = 0; 941 state->dev = NULL; 942 state->locked = NULL; 943 state->arp_table = 0; 944 state->misc_table = 0; 945 state->node = SEQ_START_TOKEN; 946 947 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; 948} 949 950static void lec_seq_stop(struct seq_file *seq, void *v) 951{ 952 struct lec_state *state = seq->private; 953 954 if (state->dev) { 955 spin_unlock_irqrestore(&state->locked->lec_arp_lock, 956 state->flags); 957 dev_put(state->dev); 958 } 959} 960 961static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) 962{ 963 struct lec_state *state = seq->private; 964 965 v = lec_get_idx(state, 1); 966 *pos += !!PTR_ERR(v); 967 return v; 968} 969 970static int lec_seq_show(struct seq_file *seq, void *v) 971{ 972 static const char lec_banner[] = 973 "Itf MAC ATM destination" 974 " Status Flags " 975 "VPI/VCI Recv VPI/VCI\n"; 976 977 if (v == SEQ_START_TOKEN) 978 seq_puts(seq, lec_banner); 979 else { 980 struct lec_state *state = seq->private; 981 struct net_device *dev = state->dev; 982 struct lec_arp_table *entry = hlist_entry(state->node, 983 struct lec_arp_table, 984 next); 985 986 seq_printf(seq, "%s ", dev->name); 987 lec_info(seq, entry); 988 } 989 return 0; 990} 991 992static const struct seq_operations lec_seq_ops = { 993 .start = lec_seq_start, 994 .next = lec_seq_next, 995 .stop = lec_seq_stop, 996 .show = lec_seq_show, 997}; 998 999static int lec_seq_open(struct inode *inode, struct file *file) 1000{ 1001 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); 1002} 1003 1004static const struct file_operations lec_seq_fops = { 1005 .owner = THIS_MODULE, 1006 .open = lec_seq_open, 1007 .read = seq_read, 1008 .llseek = seq_lseek, 1009 .release = seq_release_private, 1010}; 1011#endif 1012 1013static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1014{ 1015 struct atm_vcc *vcc = ATM_SD(sock); 1016 int err = 0; 1017 1018 switch (cmd) { 1019 case ATMLEC_CTRL: 1020 case ATMLEC_MCAST: 1021 case ATMLEC_DATA: 1022 if (!capable(CAP_NET_ADMIN)) 1023 return -EPERM; 1024 break; 1025 default: 1026 return -ENOIOCTLCMD; 1027 } 1028 1029 switch (cmd) { 1030 case ATMLEC_CTRL: 1031 err = lecd_attach(vcc, (int)arg); 1032 if (err >= 0) 1033 sock->state = SS_CONNECTED; 1034 break; 1035 case ATMLEC_MCAST: 1036 err = lec_mcast_attach(vcc, (int)arg); 1037 break; 1038 case ATMLEC_DATA: 1039 err = lec_vcc_attach(vcc, (void __user *)arg); 1040 break; 1041 } 1042 1043 return err; 1044} 1045 1046static struct atm_ioctl lane_ioctl_ops = { 1047 .owner = THIS_MODULE, 1048 .ioctl = lane_ioctl, 1049}; 1050 1051static int __init lane_module_init(void) 1052{ 1053#ifdef CONFIG_PROC_FS 1054 struct proc_dir_entry *p; 1055 1056 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); 1057 if (!p) { 1058 pr_err("Unable to initialize /proc/net/atm/lec\n"); 1059 return -ENOMEM; 1060 } 1061#endif 1062 1063 register_atm_ioctl(&lane_ioctl_ops); 1064 pr_info("lec.c: initialized\n"); 1065 return 0; 1066} 1067 1068static void __exit lane_module_cleanup(void) 1069{ 1070 int i; 1071 1072 remove_proc_entry("lec", atm_proc_root); 1073 1074 deregister_atm_ioctl(&lane_ioctl_ops); 1075 1076 for (i = 0; i < MAX_LEC_ITF; i++) { 1077 if (dev_lec[i] != NULL) { 1078 unregister_netdev(dev_lec[i]); 1079 free_netdev(dev_lec[i]); 1080 dev_lec[i] = NULL; 1081 } 1082 } 1083} 1084 1085module_init(lane_module_init); 1086module_exit(lane_module_cleanup); 1087 1088/* 1089 * LANE2: 3.1.3, LE_RESOLVE.request 1090 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. 1091 * If sizeoftlvs == NULL the default TLVs associated with with this 1092 * lec will be used. 1093 * If dst_mac == NULL, targetless LE_ARP will be sent 1094 */ 1095static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, 1096 u8 **tlvs, u32 *sizeoftlvs) 1097{ 1098 unsigned long flags; 1099 struct lec_priv *priv = netdev_priv(dev); 1100 struct lec_arp_table *table; 1101 struct sk_buff *skb; 1102 int retval; 1103 1104 if (force == 0) { 1105 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1106 table = lec_arp_find(priv, dst_mac); 1107 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1108 if (table == NULL) 1109 return -1; 1110 1111 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); 1112 if (*tlvs == NULL) 1113 return -1; 1114 1115 *sizeoftlvs = table->sizeoftlvs; 1116 1117 return 0; 1118 } 1119 1120 if (sizeoftlvs == NULL) 1121 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); 1122 1123 else { 1124 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); 1125 if (skb == NULL) 1126 return -1; 1127 skb->len = *sizeoftlvs; 1128 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); 1129 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); 1130 } 1131 return retval; 1132} 1133 1134/* 1135 * LANE2: 3.1.4, LE_ASSOCIATE.request 1136 * Associate the *tlvs with the *lan_dst address. 1137 * Will overwrite any previous association 1138 * Returns 1 for success, 0 for failure (out of memory) 1139 * 1140 */ 1141static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, 1142 const u8 *tlvs, u32 sizeoftlvs) 1143{ 1144 int retval; 1145 struct sk_buff *skb; 1146 struct lec_priv *priv = netdev_priv(dev); 1147 1148 if (!ether_addr_equal(lan_dst, dev->dev_addr)) 1149 return 0; /* not our mac address */ 1150 1151 kfree(priv->tlvs); /* NULL if there was no previous association */ 1152 1153 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1154 if (priv->tlvs == NULL) 1155 return 0; 1156 priv->sizeoftlvs = sizeoftlvs; 1157 1158 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); 1159 if (skb == NULL) 1160 return 0; 1161 skb->len = sizeoftlvs; 1162 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); 1163 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); 1164 if (retval != 0) 1165 pr_info("lec.c: lane2_associate_req() failed\n"); 1166 /* 1167 * If the previous association has changed we must 1168 * somehow notify other LANE entities about the change 1169 */ 1170 return 1; 1171} 1172 1173/* 1174 * LANE2: 3.1.5, LE_ASSOCIATE.indication 1175 * 1176 */ 1177static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, 1178 const u8 *tlvs, u32 sizeoftlvs) 1179{ 1180#if 0 1181 int i = 0; 1182#endif 1183 struct lec_priv *priv = netdev_priv(dev); 1184#if 0 /* 1185 * Why have the TLVs in LE_ARP entries 1186 * since we do not use them? When you 1187 * uncomment this code, make sure the 1188 * TLVs get freed when entry is killed 1189 */ 1190 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); 1191 1192 if (entry == NULL) 1193 return; /* should not happen */ 1194 1195 kfree(entry->tlvs); 1196 1197 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); 1198 if (entry->tlvs == NULL) 1199 return; 1200 entry->sizeoftlvs = sizeoftlvs; 1201#endif 1202#if 0 1203 pr_info("\n"); 1204 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); 1205 while (i < sizeoftlvs) 1206 pr_cont("%02x ", tlvs[i++]); 1207 1208 pr_cont("\n"); 1209#endif 1210 1211 /* tell MPOA about the TLVs we saw */ 1212 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { 1213 priv->lane2_ops->associate_indicator(dev, mac_addr, 1214 tlvs, sizeoftlvs); 1215 } 1216} 1217 1218/* 1219 * Here starts what used to lec_arpc.c 1220 * 1221 * lec_arpc.c was added here when making 1222 * lane client modular. October 1997 1223 */ 1224 1225#include <linux/types.h> 1226#include <linux/timer.h> 1227#include <linux/param.h> 1228#include <linux/atomic.h> 1229#include <linux/inetdevice.h> 1230#include <net/route.h> 1231 1232#if 0 1233#define pr_debug(format, args...) 1234/* 1235 #define pr_debug printk 1236*/ 1237#endif 1238#define DEBUG_ARP_TABLE 0 1239 1240#define LEC_ARP_REFRESH_INTERVAL (3*HZ) 1241 1242static void lec_arp_check_expire(struct work_struct *work); 1243static void lec_arp_expire_arp(unsigned long data); 1244 1245/* 1246 * Arp table funcs 1247 */ 1248 1249#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) 1250 1251/* 1252 * Initialization of arp-cache 1253 */ 1254static void lec_arp_init(struct lec_priv *priv) 1255{ 1256 unsigned short i; 1257 1258 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 1259 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1260 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1261 INIT_HLIST_HEAD(&priv->lec_no_forward); 1262 INIT_HLIST_HEAD(&priv->mcast_fwds); 1263 spin_lock_init(&priv->lec_arp_lock); 1264 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); 1265 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1266} 1267 1268static void lec_arp_clear_vccs(struct lec_arp_table *entry) 1269{ 1270 if (entry->vcc) { 1271 struct atm_vcc *vcc = entry->vcc; 1272 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); 1273 struct net_device *dev = (struct net_device *)vcc->proto_data; 1274 1275 vcc->pop = vpriv->old_pop; 1276 if (vpriv->xoff) 1277 netif_wake_queue(dev); 1278 kfree(vpriv); 1279 vcc->user_back = NULL; 1280 vcc->push = entry->old_push; 1281 vcc_release_async(vcc, -EPIPE); 1282 entry->vcc = NULL; 1283 } 1284 if (entry->recv_vcc) { 1285 entry->recv_vcc->push = entry->old_recv_push; 1286 vcc_release_async(entry->recv_vcc, -EPIPE); 1287 entry->recv_vcc = NULL; 1288 } 1289} 1290 1291/* 1292 * Insert entry to lec_arp_table 1293 * LANE2: Add to the end of the list to satisfy 8.1.13 1294 */ 1295static inline void 1296lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) 1297{ 1298 struct hlist_head *tmp; 1299 1300 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; 1301 hlist_add_head(&entry->next, tmp); 1302 1303 pr_debug("Added entry:%pM\n", entry->mac_addr); 1304} 1305 1306/* 1307 * Remove entry from lec_arp_table 1308 */ 1309static int 1310lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) 1311{ 1312 struct lec_arp_table *entry; 1313 int i, remove_vcc = 1; 1314 1315 if (!to_remove) 1316 return -1; 1317 1318 hlist_del(&to_remove->next); 1319 del_timer(&to_remove->timer); 1320 1321 /* 1322 * If this is the only MAC connected to this VCC, 1323 * also tear down the VCC 1324 */ 1325 if (to_remove->status >= ESI_FLUSH_PENDING) { 1326 /* 1327 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT 1328 */ 1329 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1330 hlist_for_each_entry(entry, 1331 &priv->lec_arp_tables[i], next) { 1332 if (memcmp(to_remove->atm_addr, 1333 entry->atm_addr, ATM_ESA_LEN) == 0) { 1334 remove_vcc = 0; 1335 break; 1336 } 1337 } 1338 } 1339 if (remove_vcc) 1340 lec_arp_clear_vccs(to_remove); 1341 } 1342 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ 1343 1344 pr_debug("Removed entry:%pM\n", to_remove->mac_addr); 1345 return 0; 1346} 1347 1348#if DEBUG_ARP_TABLE 1349static const char *get_status_string(unsigned char st) 1350{ 1351 switch (st) { 1352 case ESI_UNKNOWN: 1353 return "ESI_UNKNOWN"; 1354 case ESI_ARP_PENDING: 1355 return "ESI_ARP_PENDING"; 1356 case ESI_VC_PENDING: 1357 return "ESI_VC_PENDING"; 1358 case ESI_FLUSH_PENDING: 1359 return "ESI_FLUSH_PENDING"; 1360 case ESI_FORWARD_DIRECT: 1361 return "ESI_FORWARD_DIRECT"; 1362 } 1363 return "<UNKNOWN>"; 1364} 1365 1366static void dump_arp_table(struct lec_priv *priv) 1367{ 1368 struct lec_arp_table *rulla; 1369 char buf[256]; 1370 int i, j, offset; 1371 1372 pr_info("Dump %p:\n", priv); 1373 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1374 hlist_for_each_entry(rulla, 1375 &priv->lec_arp_tables[i], next) { 1376 offset = 0; 1377 offset += sprintf(buf, "%d: %p\n", i, rulla); 1378 offset += sprintf(buf + offset, "Mac: %pM", 1379 rulla->mac_addr); 1380 offset += sprintf(buf + offset, " Atm:"); 1381 for (j = 0; j < ATM_ESA_LEN; j++) { 1382 offset += sprintf(buf + offset, 1383 "%2.2x ", 1384 rulla->atm_addr[j] & 0xff); 1385 } 1386 offset += sprintf(buf + offset, 1387 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1388 rulla->vcc ? rulla->vcc->vpi : 0, 1389 rulla->vcc ? rulla->vcc->vci : 0, 1390 rulla->recv_vcc ? rulla->recv_vcc-> 1391 vpi : 0, 1392 rulla->recv_vcc ? rulla->recv_vcc-> 1393 vci : 0, rulla->last_used, 1394 rulla->timestamp, rulla->no_tries); 1395 offset += 1396 sprintf(buf + offset, 1397 "Flags:%x, Packets_flooded:%x, Status: %s ", 1398 rulla->flags, rulla->packets_flooded, 1399 get_status_string(rulla->status)); 1400 pr_info("%s\n", buf); 1401 } 1402 } 1403 1404 if (!hlist_empty(&priv->lec_no_forward)) 1405 pr_info("No forward\n"); 1406 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { 1407 offset = 0; 1408 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); 1409 offset += sprintf(buf + offset, " Atm:"); 1410 for (j = 0; j < ATM_ESA_LEN; j++) { 1411 offset += sprintf(buf + offset, "%2.2x ", 1412 rulla->atm_addr[j] & 0xff); 1413 } 1414 offset += sprintf(buf + offset, 1415 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1416 rulla->vcc ? rulla->vcc->vpi : 0, 1417 rulla->vcc ? rulla->vcc->vci : 0, 1418 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1419 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1420 rulla->last_used, 1421 rulla->timestamp, rulla->no_tries); 1422 offset += sprintf(buf + offset, 1423 "Flags:%x, Packets_flooded:%x, Status: %s ", 1424 rulla->flags, rulla->packets_flooded, 1425 get_status_string(rulla->status)); 1426 pr_info("%s\n", buf); 1427 } 1428 1429 if (!hlist_empty(&priv->lec_arp_empty_ones)) 1430 pr_info("Empty ones\n"); 1431 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { 1432 offset = 0; 1433 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); 1434 offset += sprintf(buf + offset, " Atm:"); 1435 for (j = 0; j < ATM_ESA_LEN; j++) { 1436 offset += sprintf(buf + offset, "%2.2x ", 1437 rulla->atm_addr[j] & 0xff); 1438 } 1439 offset += sprintf(buf + offset, 1440 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1441 rulla->vcc ? rulla->vcc->vpi : 0, 1442 rulla->vcc ? rulla->vcc->vci : 0, 1443 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1444 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1445 rulla->last_used, 1446 rulla->timestamp, rulla->no_tries); 1447 offset += sprintf(buf + offset, 1448 "Flags:%x, Packets_flooded:%x, Status: %s ", 1449 rulla->flags, rulla->packets_flooded, 1450 get_status_string(rulla->status)); 1451 pr_info("%s", buf); 1452 } 1453 1454 if (!hlist_empty(&priv->mcast_fwds)) 1455 pr_info("Multicast Forward VCCs\n"); 1456 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { 1457 offset = 0; 1458 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); 1459 offset += sprintf(buf + offset, " Atm:"); 1460 for (j = 0; j < ATM_ESA_LEN; j++) { 1461 offset += sprintf(buf + offset, "%2.2x ", 1462 rulla->atm_addr[j] & 0xff); 1463 } 1464 offset += sprintf(buf + offset, 1465 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", 1466 rulla->vcc ? rulla->vcc->vpi : 0, 1467 rulla->vcc ? rulla->vcc->vci : 0, 1468 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, 1469 rulla->recv_vcc ? rulla->recv_vcc->vci : 0, 1470 rulla->last_used, 1471 rulla->timestamp, rulla->no_tries); 1472 offset += sprintf(buf + offset, 1473 "Flags:%x, Packets_flooded:%x, Status: %s ", 1474 rulla->flags, rulla->packets_flooded, 1475 get_status_string(rulla->status)); 1476 pr_info("%s\n", buf); 1477 } 1478 1479} 1480#else 1481#define dump_arp_table(priv) do { } while (0) 1482#endif 1483 1484/* 1485 * Destruction of arp-cache 1486 */ 1487static void lec_arp_destroy(struct lec_priv *priv) 1488{ 1489 unsigned long flags; 1490 struct hlist_node *next; 1491 struct lec_arp_table *entry; 1492 int i; 1493 1494 cancel_delayed_work_sync(&priv->lec_arp_work); 1495 1496 /* 1497 * Remove all entries 1498 */ 1499 1500 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1501 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1502 hlist_for_each_entry_safe(entry, next, 1503 &priv->lec_arp_tables[i], next) { 1504 lec_arp_remove(priv, entry); 1505 lec_arp_put(entry); 1506 } 1507 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); 1508 } 1509 1510 hlist_for_each_entry_safe(entry, next, 1511 &priv->lec_arp_empty_ones, next) { 1512 del_timer_sync(&entry->timer); 1513 lec_arp_clear_vccs(entry); 1514 hlist_del(&entry->next); 1515 lec_arp_put(entry); 1516 } 1517 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); 1518 1519 hlist_for_each_entry_safe(entry, next, 1520 &priv->lec_no_forward, next) { 1521 del_timer_sync(&entry->timer); 1522 lec_arp_clear_vccs(entry); 1523 hlist_del(&entry->next); 1524 lec_arp_put(entry); 1525 } 1526 INIT_HLIST_HEAD(&priv->lec_no_forward); 1527 1528 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { 1529 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1530 lec_arp_clear_vccs(entry); 1531 hlist_del(&entry->next); 1532 lec_arp_put(entry); 1533 } 1534 INIT_HLIST_HEAD(&priv->mcast_fwds); 1535 priv->mcast_vcc = NULL; 1536 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1537} 1538 1539/* 1540 * Find entry by mac_address 1541 */ 1542static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, 1543 const unsigned char *mac_addr) 1544{ 1545 struct hlist_head *head; 1546 struct lec_arp_table *entry; 1547 1548 pr_debug("%pM\n", mac_addr); 1549 1550 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; 1551 hlist_for_each_entry(entry, head, next) { 1552 if (ether_addr_equal(mac_addr, entry->mac_addr)) 1553 return entry; 1554 } 1555 return NULL; 1556} 1557 1558static struct lec_arp_table *make_entry(struct lec_priv *priv, 1559 const unsigned char *mac_addr) 1560{ 1561 struct lec_arp_table *to_return; 1562 1563 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); 1564 if (!to_return) { 1565 pr_info("LEC: Arp entry kmalloc failed\n"); 1566 return NULL; 1567 } 1568 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); 1569 INIT_HLIST_NODE(&to_return->next); 1570 setup_timer(&to_return->timer, lec_arp_expire_arp, 1571 (unsigned long)to_return); 1572 to_return->last_used = jiffies; 1573 to_return->priv = priv; 1574 skb_queue_head_init(&to_return->tx_wait); 1575 atomic_set(&to_return->usage, 1); 1576 return to_return; 1577} 1578 1579/* Arp sent timer expired */ 1580static void lec_arp_expire_arp(unsigned long data) 1581{ 1582 struct lec_arp_table *entry; 1583 1584 entry = (struct lec_arp_table *)data; 1585 1586 pr_debug("\n"); 1587 if (entry->status == ESI_ARP_PENDING) { 1588 if (entry->no_tries <= entry->priv->max_retry_count) { 1589 if (entry->is_rdesc) 1590 send_to_lecd(entry->priv, l_rdesc_arp_xmt, 1591 entry->mac_addr, NULL, NULL); 1592 else 1593 send_to_lecd(entry->priv, l_arp_xmt, 1594 entry->mac_addr, NULL, NULL); 1595 entry->no_tries++; 1596 } 1597 mod_timer(&entry->timer, jiffies + (1 * HZ)); 1598 } 1599} 1600 1601/* Unknown/unused vcc expire, remove associated entry */ 1602static void lec_arp_expire_vcc(unsigned long data) 1603{ 1604 unsigned long flags; 1605 struct lec_arp_table *to_remove = (struct lec_arp_table *)data; 1606 struct lec_priv *priv = to_remove->priv; 1607 1608 del_timer(&to_remove->timer); 1609 1610 pr_debug("%p %p: vpi:%d vci:%d\n", 1611 to_remove, priv, 1612 to_remove->vcc ? to_remove->recv_vcc->vpi : 0, 1613 to_remove->vcc ? to_remove->recv_vcc->vci : 0); 1614 1615 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1616 hlist_del(&to_remove->next); 1617 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1618 1619 lec_arp_clear_vccs(to_remove); 1620 lec_arp_put(to_remove); 1621} 1622 1623static bool __lec_arp_check_expire(struct lec_arp_table *entry, 1624 unsigned long now, 1625 struct lec_priv *priv) 1626{ 1627 unsigned long time_to_check; 1628 1629 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) 1630 time_to_check = priv->forward_delay_time; 1631 else 1632 time_to_check = priv->aging_time; 1633 1634 pr_debug("About to expire: %lx - %lx > %lx\n", 1635 now, entry->last_used, time_to_check); 1636 if (time_after(now, entry->last_used + time_to_check) && 1637 !(entry->flags & LEC_PERMANENT_FLAG) && 1638 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ 1639 /* Remove entry */ 1640 pr_debug("Entry timed out\n"); 1641 lec_arp_remove(priv, entry); 1642 lec_arp_put(entry); 1643 } else { 1644 /* Something else */ 1645 if ((entry->status == ESI_VC_PENDING || 1646 entry->status == ESI_ARP_PENDING) && 1647 time_after_eq(now, entry->timestamp + 1648 priv->max_unknown_frame_time)) { 1649 entry->timestamp = jiffies; 1650 entry->packets_flooded = 0; 1651 if (entry->status == ESI_VC_PENDING) 1652 send_to_lecd(priv, l_svc_setup, 1653 entry->mac_addr, 1654 entry->atm_addr, 1655 NULL); 1656 } 1657 if (entry->status == ESI_FLUSH_PENDING && 1658 time_after_eq(now, entry->timestamp + 1659 priv->path_switching_delay)) { 1660 lec_arp_hold(entry); 1661 return true; 1662 } 1663 } 1664 1665 return false; 1666} 1667/* 1668 * Expire entries. 1669 * 1. Re-set timer 1670 * 2. For each entry, delete entries that have aged past the age limit. 1671 * 3. For each entry, depending on the status of the entry, perform 1672 * the following maintenance. 1673 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the 1674 * tick_count is above the max_unknown_frame_time, clear 1675 * the tick_count to zero and clear the packets_flooded counter 1676 * to zero. This supports the packet rate limit per address 1677 * while flooding unknowns. 1678 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater 1679 * than or equal to the path_switching_delay, change the status 1680 * to ESI_FORWARD_DIRECT. This causes the flush period to end 1681 * regardless of the progress of the flush protocol. 1682 */ 1683static void lec_arp_check_expire(struct work_struct *work) 1684{ 1685 unsigned long flags; 1686 struct lec_priv *priv = 1687 container_of(work, struct lec_priv, lec_arp_work.work); 1688 struct hlist_node *next; 1689 struct lec_arp_table *entry; 1690 unsigned long now; 1691 int i; 1692 1693 pr_debug("%p\n", priv); 1694 now = jiffies; 1695restart: 1696 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1697 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1698 hlist_for_each_entry_safe(entry, next, 1699 &priv->lec_arp_tables[i], next) { 1700 if (__lec_arp_check_expire(entry, now, priv)) { 1701 struct sk_buff *skb; 1702 struct atm_vcc *vcc = entry->vcc; 1703 1704 spin_unlock_irqrestore(&priv->lec_arp_lock, 1705 flags); 1706 while ((skb = skb_dequeue(&entry->tx_wait))) 1707 lec_send(vcc, skb); 1708 entry->last_used = jiffies; 1709 entry->status = ESI_FORWARD_DIRECT; 1710 lec_arp_put(entry); 1711 1712 goto restart; 1713 } 1714 } 1715 } 1716 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1717 1718 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); 1719} 1720 1721/* 1722 * Try to find vcc where mac_address is attached. 1723 * 1724 */ 1725static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, 1726 const unsigned char *mac_to_find, 1727 int is_rdesc, 1728 struct lec_arp_table **ret_entry) 1729{ 1730 unsigned long flags; 1731 struct lec_arp_table *entry; 1732 struct atm_vcc *found; 1733 1734 if (mac_to_find[0] & 0x01) { 1735 switch (priv->lane_version) { 1736 case 1: 1737 return priv->mcast_vcc; 1738 case 2: /* LANE2 wants arp for multicast addresses */ 1739 if (ether_addr_equal(mac_to_find, bus_mac)) 1740 return priv->mcast_vcc; 1741 break; 1742 default: 1743 break; 1744 } 1745 } 1746 1747 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1748 entry = lec_arp_find(priv, mac_to_find); 1749 1750 if (entry) { 1751 if (entry->status == ESI_FORWARD_DIRECT) { 1752 /* Connection Ok */ 1753 entry->last_used = jiffies; 1754 lec_arp_hold(entry); 1755 *ret_entry = entry; 1756 found = entry->vcc; 1757 goto out; 1758 } 1759 /* 1760 * If the LE_ARP cache entry is still pending, reset count to 0 1761 * so another LE_ARP request can be made for this frame. 1762 */ 1763 if (entry->status == ESI_ARP_PENDING) 1764 entry->no_tries = 0; 1765 /* 1766 * Data direct VC not yet set up, check to see if the unknown 1767 * frame count is greater than the limit. If the limit has 1768 * not been reached, allow the caller to send packet to 1769 * BUS. 1770 */ 1771 if (entry->status != ESI_FLUSH_PENDING && 1772 entry->packets_flooded < 1773 priv->maximum_unknown_frame_count) { 1774 entry->packets_flooded++; 1775 pr_debug("Flooding..\n"); 1776 found = priv->mcast_vcc; 1777 goto out; 1778 } 1779 /* 1780 * We got here because entry->status == ESI_FLUSH_PENDING 1781 * or BUS flood limit was reached for an entry which is 1782 * in ESI_ARP_PENDING or ESI_VC_PENDING state. 1783 */ 1784 lec_arp_hold(entry); 1785 *ret_entry = entry; 1786 pr_debug("entry->status %d entry->vcc %p\n", entry->status, 1787 entry->vcc); 1788 found = NULL; 1789 } else { 1790 /* No matching entry was found */ 1791 entry = make_entry(priv, mac_to_find); 1792 pr_debug("Making entry\n"); 1793 if (!entry) { 1794 found = priv->mcast_vcc; 1795 goto out; 1796 } 1797 lec_arp_add(priv, entry); 1798 /* We want arp-request(s) to be sent */ 1799 entry->packets_flooded = 1; 1800 entry->status = ESI_ARP_PENDING; 1801 entry->no_tries = 1; 1802 entry->last_used = entry->timestamp = jiffies; 1803 entry->is_rdesc = is_rdesc; 1804 if (entry->is_rdesc) 1805 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, 1806 NULL); 1807 else 1808 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); 1809 entry->timer.expires = jiffies + (1 * HZ); 1810 entry->timer.function = lec_arp_expire_arp; 1811 add_timer(&entry->timer); 1812 found = priv->mcast_vcc; 1813 } 1814 1815out: 1816 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1817 return found; 1818} 1819 1820static int 1821lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, 1822 unsigned long permanent) 1823{ 1824 unsigned long flags; 1825 struct hlist_node *next; 1826 struct lec_arp_table *entry; 1827 int i; 1828 1829 pr_debug("\n"); 1830 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1831 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1832 hlist_for_each_entry_safe(entry, next, 1833 &priv->lec_arp_tables[i], next) { 1834 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && 1835 (permanent || 1836 !(entry->flags & LEC_PERMANENT_FLAG))) { 1837 lec_arp_remove(priv, entry); 1838 lec_arp_put(entry); 1839 } 1840 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1841 return 0; 1842 } 1843 } 1844 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1845 return -1; 1846} 1847 1848/* 1849 * Notifies: Response to arp_request (atm_addr != NULL) 1850 */ 1851static void 1852lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, 1853 const unsigned char *atm_addr, unsigned long remoteflag, 1854 unsigned int targetless_le_arp) 1855{ 1856 unsigned long flags; 1857 struct hlist_node *next; 1858 struct lec_arp_table *entry, *tmp; 1859 int i; 1860 1861 pr_debug("%smac:%pM\n", 1862 (targetless_le_arp) ? "targetless " : "", mac_addr); 1863 1864 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1865 entry = lec_arp_find(priv, mac_addr); 1866 if (entry == NULL && targetless_le_arp) 1867 goto out; /* 1868 * LANE2: ignore targetless LE_ARPs for which 1869 * we have no entry in the cache. 7.1.30 1870 */ 1871 if (!hlist_empty(&priv->lec_arp_empty_ones)) { 1872 hlist_for_each_entry_safe(entry, next, 1873 &priv->lec_arp_empty_ones, next) { 1874 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { 1875 hlist_del(&entry->next); 1876 del_timer(&entry->timer); 1877 tmp = lec_arp_find(priv, mac_addr); 1878 if (tmp) { 1879 del_timer(&tmp->timer); 1880 tmp->status = ESI_FORWARD_DIRECT; 1881 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); 1882 tmp->vcc = entry->vcc; 1883 tmp->old_push = entry->old_push; 1884 tmp->last_used = jiffies; 1885 del_timer(&entry->timer); 1886 lec_arp_put(entry); 1887 entry = tmp; 1888 } else { 1889 entry->status = ESI_FORWARD_DIRECT; 1890 memcpy(entry->mac_addr, mac_addr, ETH_ALEN); 1891 entry->last_used = jiffies; 1892 lec_arp_add(priv, entry); 1893 } 1894 if (remoteflag) 1895 entry->flags |= LEC_REMOTE_FLAG; 1896 else 1897 entry->flags &= ~LEC_REMOTE_FLAG; 1898 pr_debug("After update\n"); 1899 dump_arp_table(priv); 1900 goto out; 1901 } 1902 } 1903 } 1904 1905 entry = lec_arp_find(priv, mac_addr); 1906 if (!entry) { 1907 entry = make_entry(priv, mac_addr); 1908 if (!entry) 1909 goto out; 1910 entry->status = ESI_UNKNOWN; 1911 lec_arp_add(priv, entry); 1912 /* Temporary, changes before end of function */ 1913 } 1914 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); 1915 del_timer(&entry->timer); 1916 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 1917 hlist_for_each_entry(tmp, 1918 &priv->lec_arp_tables[i], next) { 1919 if (entry != tmp && 1920 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { 1921 /* Vcc to this host exists */ 1922 if (tmp->status > ESI_VC_PENDING) { 1923 /* 1924 * ESI_FLUSH_PENDING, 1925 * ESI_FORWARD_DIRECT 1926 */ 1927 entry->vcc = tmp->vcc; 1928 entry->old_push = tmp->old_push; 1929 } 1930 entry->status = tmp->status; 1931 break; 1932 } 1933 } 1934 } 1935 if (remoteflag) 1936 entry->flags |= LEC_REMOTE_FLAG; 1937 else 1938 entry->flags &= ~LEC_REMOTE_FLAG; 1939 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { 1940 entry->status = ESI_VC_PENDING; 1941 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); 1942 } 1943 pr_debug("After update2\n"); 1944 dump_arp_table(priv); 1945out: 1946 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 1947} 1948 1949/* 1950 * Notifies: Vcc setup ready 1951 */ 1952static void 1953lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, 1954 struct atm_vcc *vcc, 1955 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) 1956{ 1957 unsigned long flags; 1958 struct lec_arp_table *entry; 1959 int i, found_entry = 0; 1960 1961 spin_lock_irqsave(&priv->lec_arp_lock, flags); 1962 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ 1963 if (ioc_data->receive == 2) { 1964 pr_debug("LEC_ARP: Attaching mcast forward\n"); 1965#if 0 1966 entry = lec_arp_find(priv, bus_mac); 1967 if (!entry) { 1968 pr_info("LEC_ARP: Multicast entry not found!\n"); 1969 goto out; 1970 } 1971 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 1972 entry->recv_vcc = vcc; 1973 entry->old_recv_push = old_push; 1974#endif 1975 entry = make_entry(priv, bus_mac); 1976 if (entry == NULL) 1977 goto out; 1978 del_timer(&entry->timer); 1979 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 1980 entry->recv_vcc = vcc; 1981 entry->old_recv_push = old_push; 1982 hlist_add_head(&entry->next, &priv->mcast_fwds); 1983 goto out; 1984 } else if (ioc_data->receive == 1) { 1985 /* 1986 * Vcc which we don't want to make default vcc, 1987 * attach it anyway. 1988 */ 1989 pr_debug("LEC_ARP:Attaching data direct, not default: %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", 1990 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 1991 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 1992 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 1993 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 1994 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 1995 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 1996 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 1997 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 1998 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 1999 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2000 entry = make_entry(priv, bus_mac); 2001 if (entry == NULL) 2002 goto out; 2003 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2004 memset(entry->mac_addr, 0, ETH_ALEN); 2005 entry->recv_vcc = vcc; 2006 entry->old_recv_push = old_push; 2007 entry->status = ESI_UNKNOWN; 2008 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2009 entry->timer.function = lec_arp_expire_vcc; 2010 hlist_add_head(&entry->next, &priv->lec_no_forward); 2011 add_timer(&entry->timer); 2012 dump_arp_table(priv); 2013 goto out; 2014 } 2015 pr_debug("LEC_ARP:Attaching data direct, default: %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", 2016 ioc_data->atm_addr[0], ioc_data->atm_addr[1], 2017 ioc_data->atm_addr[2], ioc_data->atm_addr[3], 2018 ioc_data->atm_addr[4], ioc_data->atm_addr[5], 2019 ioc_data->atm_addr[6], ioc_data->atm_addr[7], 2020 ioc_data->atm_addr[8], ioc_data->atm_addr[9], 2021 ioc_data->atm_addr[10], ioc_data->atm_addr[11], 2022 ioc_data->atm_addr[12], ioc_data->atm_addr[13], 2023 ioc_data->atm_addr[14], ioc_data->atm_addr[15], 2024 ioc_data->atm_addr[16], ioc_data->atm_addr[17], 2025 ioc_data->atm_addr[18], ioc_data->atm_addr[19]); 2026 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2027 hlist_for_each_entry(entry, 2028 &priv->lec_arp_tables[i], next) { 2029 if (memcmp 2030 (ioc_data->atm_addr, entry->atm_addr, 2031 ATM_ESA_LEN) == 0) { 2032 pr_debug("LEC_ARP: Attaching data direct\n"); 2033 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", 2034 entry->vcc ? entry->vcc->vci : 0, 2035 entry->recv_vcc ? entry->recv_vcc-> 2036 vci : 0); 2037 found_entry = 1; 2038 del_timer(&entry->timer); 2039 entry->vcc = vcc; 2040 entry->old_push = old_push; 2041 if (entry->status == ESI_VC_PENDING) { 2042 if (priv->maximum_unknown_frame_count 2043 == 0) 2044 entry->status = 2045 ESI_FORWARD_DIRECT; 2046 else { 2047 entry->timestamp = jiffies; 2048 entry->status = 2049 ESI_FLUSH_PENDING; 2050#if 0 2051 send_to_lecd(priv, l_flush_xmt, 2052 NULL, 2053 entry->atm_addr, 2054 NULL); 2055#endif 2056 } 2057 } else { 2058 /* 2059 * They were forming a connection 2060 * to us, and we to them. Our 2061 * ATM address is numerically lower 2062 * than theirs, so we make connection 2063 * we formed into default VCC (8.1.11). 2064 * Connection they made gets torn 2065 * down. This might confuse some 2066 * clients. Can be changed if 2067 * someone reports trouble... 2068 */ 2069 ; 2070 } 2071 } 2072 } 2073 } 2074 if (found_entry) { 2075 pr_debug("After vcc was added\n"); 2076 dump_arp_table(priv); 2077 goto out; 2078 } 2079 /* 2080 * Not found, snatch address from first data packet that arrives 2081 * from this vcc 2082 */ 2083 entry = make_entry(priv, bus_mac); 2084 if (!entry) 2085 goto out; 2086 entry->vcc = vcc; 2087 entry->old_push = old_push; 2088 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); 2089 memset(entry->mac_addr, 0, ETH_ALEN); 2090 entry->status = ESI_UNKNOWN; 2091 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); 2092 entry->timer.expires = jiffies + priv->vcc_timeout_period; 2093 entry->timer.function = lec_arp_expire_vcc; 2094 add_timer(&entry->timer); 2095 pr_debug("After vcc was added\n"); 2096 dump_arp_table(priv); 2097out: 2098 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2099} 2100 2101static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) 2102{ 2103 unsigned long flags; 2104 struct lec_arp_table *entry; 2105 int i; 2106 2107 pr_debug("%lx\n", tran_id); 2108restart: 2109 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2110 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2111 hlist_for_each_entry(entry, 2112 &priv->lec_arp_tables[i], next) { 2113 if (entry->flush_tran_id == tran_id && 2114 entry->status == ESI_FLUSH_PENDING) { 2115 struct sk_buff *skb; 2116 struct atm_vcc *vcc = entry->vcc; 2117 2118 lec_arp_hold(entry); 2119 spin_unlock_irqrestore(&priv->lec_arp_lock, 2120 flags); 2121 while ((skb = skb_dequeue(&entry->tx_wait))) 2122 lec_send(vcc, skb); 2123 entry->last_used = jiffies; 2124 entry->status = ESI_FORWARD_DIRECT; 2125 lec_arp_put(entry); 2126 pr_debug("LEC_ARP: Flushed\n"); 2127 goto restart; 2128 } 2129 } 2130 } 2131 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2132 dump_arp_table(priv); 2133} 2134 2135static void 2136lec_set_flush_tran_id(struct lec_priv *priv, 2137 const unsigned char *atm_addr, unsigned long tran_id) 2138{ 2139 unsigned long flags; 2140 struct lec_arp_table *entry; 2141 int i; 2142 2143 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2144 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) 2145 hlist_for_each_entry(entry, 2146 &priv->lec_arp_tables[i], next) { 2147 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { 2148 entry->flush_tran_id = tran_id; 2149 pr_debug("Set flush transaction id to %lx for %p\n", 2150 tran_id, entry); 2151 } 2152 } 2153 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2154} 2155 2156static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) 2157{ 2158 unsigned long flags; 2159 unsigned char mac_addr[] = { 2160 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 2161 }; 2162 struct lec_arp_table *to_add; 2163 struct lec_vcc_priv *vpriv; 2164 int err = 0; 2165 2166 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); 2167 if (!vpriv) 2168 return -ENOMEM; 2169 vpriv->xoff = 0; 2170 vpriv->old_pop = vcc->pop; 2171 vcc->user_back = vpriv; 2172 vcc->pop = lec_pop; 2173 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2174 to_add = make_entry(priv, mac_addr); 2175 if (!to_add) { 2176 vcc->pop = vpriv->old_pop; 2177 kfree(vpriv); 2178 err = -ENOMEM; 2179 goto out; 2180 } 2181 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); 2182 to_add->status = ESI_FORWARD_DIRECT; 2183 to_add->flags |= LEC_PERMANENT_FLAG; 2184 to_add->vcc = vcc; 2185 to_add->old_push = vcc->push; 2186 vcc->push = lec_push; 2187 priv->mcast_vcc = vcc; 2188 lec_arp_add(priv, to_add); 2189out: 2190 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2191 return err; 2192} 2193 2194static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) 2195{ 2196 unsigned long flags; 2197 struct hlist_node *next; 2198 struct lec_arp_table *entry; 2199 int i; 2200 2201 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); 2202 dump_arp_table(priv); 2203 2204 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2205 2206 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { 2207 hlist_for_each_entry_safe(entry, next, 2208 &priv->lec_arp_tables[i], next) { 2209 if (vcc == entry->vcc) { 2210 lec_arp_remove(priv, entry); 2211 lec_arp_put(entry); 2212 if (priv->mcast_vcc == vcc) 2213 priv->mcast_vcc = NULL; 2214 } 2215 } 2216 } 2217 2218 hlist_for_each_entry_safe(entry, next, 2219 &priv->lec_arp_empty_ones, next) { 2220 if (entry->vcc == vcc) { 2221 lec_arp_clear_vccs(entry); 2222 del_timer(&entry->timer); 2223 hlist_del(&entry->next); 2224 lec_arp_put(entry); 2225 } 2226 } 2227 2228 hlist_for_each_entry_safe(entry, next, 2229 &priv->lec_no_forward, next) { 2230 if (entry->recv_vcc == vcc) { 2231 lec_arp_clear_vccs(entry); 2232 del_timer(&entry->timer); 2233 hlist_del(&entry->next); 2234 lec_arp_put(entry); 2235 } 2236 } 2237 2238 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { 2239 if (entry->recv_vcc == vcc) { 2240 lec_arp_clear_vccs(entry); 2241 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ 2242 hlist_del(&entry->next); 2243 lec_arp_put(entry); 2244 } 2245 } 2246 2247 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2248 dump_arp_table(priv); 2249} 2250 2251static void 2252lec_arp_check_empties(struct lec_priv *priv, 2253 struct atm_vcc *vcc, struct sk_buff *skb) 2254{ 2255 unsigned long flags; 2256 struct hlist_node *next; 2257 struct lec_arp_table *entry, *tmp; 2258 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; 2259 unsigned char *src = hdr->h_source; 2260 2261 spin_lock_irqsave(&priv->lec_arp_lock, flags); 2262 hlist_for_each_entry_safe(entry, next, 2263 &priv->lec_arp_empty_ones, next) { 2264 if (vcc == entry->vcc) { 2265 del_timer(&entry->timer); 2266 memcpy(entry->mac_addr, src, ETH_ALEN); 2267 entry->status = ESI_FORWARD_DIRECT; 2268 entry->last_used = jiffies; 2269 /* We might have got an entry */ 2270 tmp = lec_arp_find(priv, src); 2271 if (tmp) { 2272 lec_arp_remove(priv, tmp); 2273 lec_arp_put(tmp); 2274 } 2275 hlist_del(&entry->next); 2276 lec_arp_add(priv, entry); 2277 goto out; 2278 } 2279 } 2280 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); 2281out: 2282 spin_unlock_irqrestore(&priv->lec_arp_lock, flags); 2283} 2284 2285MODULE_LICENSE("GPL"); 2286