2 * lec.c: Lan Emulation driver
4 * Marko Kiiskila <mkiiskila@yahoo.com>
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
16 #include <linux/skbuff.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/seq_file.h>
26 /* TokenRing if needed */
28 #include <linux/trdevice.h>
32 #include <linux/atmdev.h>
33 #include <linux/atmlec.h>
35 /* Proxy LEC knows about bridging */
36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
37 #include <linux/if_bridge.h>
38 #include "../bridge/br_private.h"
40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
44 #include <linux/module.h>
45 #include <linux/init.h>
49 #include "resources.h"
51 #define DUMP_PACKETS 0 /*
57 #define LEC_UNRES_QUE_LEN 8 /*
58 * number of tx packets to queue for a
59 * single destination while waiting for SVC
62 static int lec_open(struct net_device *dev);
63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
64 static int lec_close(struct net_device *dev);
65 static struct net_device_stats *lec_get_stats(struct net_device *dev);
66 static void lec_init(struct net_device *dev);
67 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
68 const unsigned char *mac_addr);
69 static int lec_arp_remove(struct lec_priv *priv,
70 struct lec_arp_table *to_remove);
72 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
73 const u8 *tlvs, u32 sizeoftlvs);
74 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
75 u8 **tlvs, u32 *sizeoftlvs);
76 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
77 const u8 *tlvs, u32 sizeoftlvs);
79 static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
80 unsigned long permanent);
81 static void lec_arp_check_empties(struct lec_priv *priv,
82 struct atm_vcc *vcc, struct sk_buff *skb);
83 static void lec_arp_destroy(struct lec_priv *priv);
84 static void lec_arp_init(struct lec_priv *priv);
85 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
86 const unsigned char *mac_to_find,
88 struct lec_arp_table **ret_entry);
89 static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
90 const unsigned char *atm_addr, unsigned long remoteflag,
91 unsigned int targetless_le_arp);
92 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
93 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
94 static void lec_set_flush_tran_id(struct lec_priv *priv,
95 const unsigned char *atm_addr,
96 unsigned long tran_id);
97 static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
99 void (*old_push) (struct atm_vcc *vcc,
100 struct sk_buff *skb));
101 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
103 /* must be done under lec_arp_lock */
104 static inline void lec_arp_hold(struct lec_arp_table *entry)
106 atomic_inc(&entry->usage);
109 static inline void lec_arp_put(struct lec_arp_table *entry)
111 if (atomic_dec_and_test(&entry->usage))
116 static struct lane2_ops lane2_ops = {
117 lane2_resolve, /* resolve, spec 3.1.3 */
118 lane2_associate_req, /* associate_req, spec 3.1.4 */
119 NULL /* associate indicator, spec 3.1.5 */
122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
124 /* Device structures */
125 static struct net_device *dev_lec[MAX_LEC_ITF];
127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
132 struct lec_priv *priv;
135 * Check if this is a BPDU. If so, ask zeppelin to send
136 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
137 * as the Config BPDU has
139 eth = (struct ethhdr *)skb->data;
140 buff = skb->data + skb->dev->hard_header_len;
141 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
143 struct sk_buff *skb2;
144 struct atmlec_msg *mesg;
146 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
149 skb2->len = sizeof(struct atmlec_msg);
150 mesg = (struct atmlec_msg *)skb2->data;
151 mesg->type = l_topology_change;
153 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
155 priv = (struct lec_priv *)dev->priv;
156 atm_force_charge(priv->lecd, skb2->truesize);
157 sk = sk_atm(priv->lecd);
158 skb_queue_tail(&sk->sk_receive_queue, skb2);
159 sk->sk_data_ready(sk, skb2->len);
164 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
167 * Modelled after tr_type_trans
168 * All multicast and ARE or STE frames go to BUS.
169 * Non source routed frames go by destination address.
170 * Last hop source routed frames go by destination address.
171 * Not last hop source routed frames go by _next_ route descriptor.
172 * Returns pointer to destination MAC address or fills in rdesc
176 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
179 unsigned int riflen, num_rdsc;
181 trh = (struct trh_hdr *)packet;
182 if (trh->daddr[0] & (uint8_t) 0x80)
183 return bus_mac; /* multicast */
185 if (trh->saddr[0] & TR_RII) {
186 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
187 if ((ntohs(trh->rcf) >> 13) != 0)
188 return bus_mac; /* ARE or STE */
190 return trh->daddr; /* not source routed */
193 return trh->daddr; /* last hop, source routed */
195 /* riflen is 6 or more, packet has more than one route descriptor */
196 num_rdsc = (riflen / 2) - 1;
197 memset(rdesc, 0, ETH_ALEN);
198 /* offset 4 comes from LAN destination field in LE control frames */
199 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
200 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
202 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
203 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
208 #endif /* CONFIG_TR */
211 * Open/initialize the netdevice. This is called (in the current kernel)
212 * sometime after booting when the 'ifconfig' program is run.
214 * This routine should set everything up anew at each open, even
215 * registers that "should" only need to be set once at boot, so that
216 * there is non-reboot way to recover if something goes wrong.
219 static int lec_open(struct net_device *dev)
221 struct lec_priv *priv = (struct lec_priv *)dev->priv;
223 netif_start_queue(dev);
224 memset(&priv->stats, 0, sizeof(struct net_device_stats));
229 static __inline__ void
230 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
232 ATM_SKB(skb)->vcc = vcc;
233 ATM_SKB(skb)->atm_options = vcc->atm_options;
235 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
236 if (vcc->send(vcc, skb) < 0) {
237 priv->stats.tx_dropped++;
241 priv->stats.tx_packets++;
242 priv->stats.tx_bytes += skb->len;
245 static void lec_tx_timeout(struct net_device *dev)
247 printk(KERN_INFO "%s: tx timeout\n", dev->name);
248 dev->trans_start = jiffies;
249 netif_wake_queue(dev);
252 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
254 struct sk_buff *skb2;
255 struct lec_priv *priv = (struct lec_priv *)dev->priv;
256 struct lecdatahdr_8023 *lec_h;
258 struct lec_arp_table *entry;
262 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
268 #endif /* DUMP_PACKETS >0 */
270 pr_debug("lec_start_xmit called\n");
272 printk("%s:No lecd attached\n", dev->name);
273 priv->stats.tx_errors++;
274 netif_stop_queue(dev);
278 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
279 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
280 (long)skb_end_pointer(skb));
281 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
282 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
283 lec_handle_bridge(skb, dev);
286 /* Make sure we have room for lec_id */
287 if (skb_headroom(skb) < 2) {
289 pr_debug("lec_start_xmit: reallocating skb\n");
290 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
298 /* Put le header to place, works for TokenRing too */
299 lec_h = (struct lecdatahdr_8023 *)skb->data;
300 lec_h->le_header = htons(priv->lecid);
304 * Ugly. Use this to realign Token Ring packets for
305 * e.g. PCA-200E driver.
307 if (priv->is_trdev) {
308 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
317 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
318 skb->len, priv->lecid);
319 #if DUMP_PACKETS >= 2
320 for (i = 0; i < skb->len && i < 99; i++) {
321 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
323 #elif DUMP_PACKETS >= 1
324 for (i = 0; i < skb->len && i < 30; i++) {
325 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
327 #endif /* DUMP_PACKETS >= 1 */
331 printk("%s...\n", buf);
332 #endif /* DUMP_PACKETS > 0 */
334 /* Minimum ethernet-frame size */
337 min_frame_size = LEC_MINIMUM_8025_SIZE;
340 min_frame_size = LEC_MINIMUM_8023_SIZE;
341 if (skb->len < min_frame_size) {
342 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
343 skb2 = skb_copy_expand(skb, 0,
344 min_frame_size - skb->truesize,
348 priv->stats.tx_dropped++;
353 skb_put(skb, min_frame_size - skb->len);
356 /* Send to right vcc */
360 if (priv->is_trdev) {
361 dst = get_tr_dst(skb->data + 2, rdesc);
369 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
370 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
371 vcc, vcc ? vcc->flags : 0, entry);
372 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
373 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
374 pr_debug("%s:lec_start_xmit: queuing packet, ",
376 pr_debug("MAC address %pM\n", lec_h->h_dest);
377 skb_queue_tail(&entry->tx_wait, skb);
380 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
382 pr_debug("MAC address %pM\n", lec_h->h_dest);
383 priv->stats.tx_dropped++;
389 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
390 #endif /* DUMP_PACKETS > 0 */
392 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
393 pr_debug("lec.c: emptying tx queue, ");
394 pr_debug("MAC address %pM\n", lec_h->h_dest);
395 lec_send(vcc, skb2, priv);
398 lec_send(vcc, skb, priv);
400 if (!atm_may_send(vcc, 0)) {
401 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
404 netif_stop_queue(dev);
407 * vcc->pop() might have occurred in between, making
408 * the vcc usuable again. Since xmit is serialized,
409 * this is the only situation we have to re-test.
412 if (atm_may_send(vcc, 0))
413 netif_wake_queue(dev);
419 dev->trans_start = jiffies;
423 /* The inverse routine to net_open(). */
424 static int lec_close(struct net_device *dev)
426 netif_stop_queue(dev);
431 * Get the current statistics.
432 * This may be called with the card open or closed.
434 static struct net_device_stats *lec_get_stats(struct net_device *dev)
436 return &((struct lec_priv *)dev->priv)->stats;
439 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
442 struct net_device *dev = (struct net_device *)vcc->proto_data;
443 struct lec_priv *priv = (struct lec_priv *)dev->priv;
444 struct atmlec_msg *mesg;
445 struct lec_arp_table *entry;
447 char *tmp; /* FIXME */
449 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
450 mesg = (struct atmlec_msg *)skb->data;
452 tmp += sizeof(struct atmlec_msg);
453 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
454 switch (mesg->type) {
456 for (i = 0; i < 6; i++) {
457 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
461 for (i = 0; i < 6; i++) {
462 dev->dev_addr[i] = 0;
466 lec_addr_delete(priv, mesg->content.normal.atm_addr,
467 mesg->content.normal.flag);
469 case l_topology_change:
470 priv->topology_change = mesg->content.normal.flag;
472 case l_flush_complete:
473 lec_flush_complete(priv, mesg->content.normal.flag);
475 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
476 spin_lock_irqsave(&priv->lec_arp_lock, flags);
477 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
478 lec_arp_remove(priv, entry);
479 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
481 if (mesg->content.normal.no_source_le_narp)
485 lec_arp_update(priv, mesg->content.normal.mac_addr,
486 mesg->content.normal.atm_addr,
487 mesg->content.normal.flag,
488 mesg->content.normal.targetless_le_arp);
489 pr_debug("lec: in l_arp_update\n");
490 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
491 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
493 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
494 tmp, mesg->sizeoftlvs);
498 priv->maximum_unknown_frame_count =
499 mesg->content.config.maximum_unknown_frame_count;
500 priv->max_unknown_frame_time =
501 (mesg->content.config.max_unknown_frame_time * HZ);
502 priv->max_retry_count = mesg->content.config.max_retry_count;
503 priv->aging_time = (mesg->content.config.aging_time * HZ);
504 priv->forward_delay_time =
505 (mesg->content.config.forward_delay_time * HZ);
506 priv->arp_response_time =
507 (mesg->content.config.arp_response_time * HZ);
508 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
509 priv->path_switching_delay =
510 (mesg->content.config.path_switching_delay * HZ);
511 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
512 priv->lane2_ops = NULL;
513 if (priv->lane_version > 1)
514 priv->lane2_ops = &lane2_ops;
515 if (dev->change_mtu(dev, mesg->content.config.mtu))
516 printk("%s: change_mtu to %d failed\n", dev->name,
517 mesg->content.config.mtu);
518 priv->is_proxy = mesg->content.config.is_proxy;
520 case l_flush_tran_id:
521 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
522 mesg->content.normal.flag);
526 (unsigned short)(0xffff & mesg->content.normal.flag);
528 case l_should_bridge:
529 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
531 struct net_bridge_fdb_entry *f;
533 pr_debug("%s: bridge zeppelin asks about %pM\n",
534 dev->name, mesg->content.proxy.mac_addr);
536 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
539 f = br_fdb_get_hook(dev->br_port->br,
540 mesg->content.proxy.mac_addr);
541 if (f != NULL && f->dst->dev != dev
542 && f->dst->state == BR_STATE_FORWARDING) {
543 /* hit from bridge table, send LE_ARP_RESPONSE */
544 struct sk_buff *skb2;
548 ("%s: entry found, responding to zeppelin\n",
551 alloc_skb(sizeof(struct atmlec_msg),
557 skb2->len = sizeof(struct atmlec_msg);
558 skb_copy_to_linear_data(skb2, mesg,
560 atm_force_charge(priv->lecd, skb2->truesize);
561 sk = sk_atm(priv->lecd);
562 skb_queue_tail(&sk->sk_receive_queue, skb2);
563 sk->sk_data_ready(sk, skb2->len);
568 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
571 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
579 static void lec_atm_close(struct atm_vcc *vcc)
582 struct net_device *dev = (struct net_device *)vcc->proto_data;
583 struct lec_priv *priv = (struct lec_priv *)dev->priv;
586 /* Do something needful? */
588 netif_stop_queue(dev);
589 lec_arp_destroy(priv);
591 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
592 printk("%s lec_atm_close: closing with messages pending\n",
594 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
595 atm_return(vcc, skb->truesize);
599 printk("%s: Shut down!\n", dev->name);
600 module_put(THIS_MODULE);
603 static struct atmdev_ops lecdev_ops = {
604 .close = lec_atm_close,
608 static struct atm_dev lecatm_dev = {
611 .number = 999, /* dummy device number */
612 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
616 * LANE2: new argument struct sk_buff *data contains
617 * the LE_ARP based TLVs introduced in the LANE2 spec
620 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
621 const unsigned char *mac_addr, const unsigned char *atm_addr,
622 struct sk_buff *data)
626 struct atmlec_msg *mesg;
628 if (!priv || !priv->lecd) {
631 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
634 skb->len = sizeof(struct atmlec_msg);
635 mesg = (struct atmlec_msg *)skb->data;
636 memset(mesg, 0, sizeof(struct atmlec_msg));
639 mesg->sizeoftlvs = data->len;
641 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
643 mesg->content.normal.targetless_le_arp = 1;
645 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
647 atm_force_charge(priv->lecd, skb->truesize);
648 sk = sk_atm(priv->lecd);
649 skb_queue_tail(&sk->sk_receive_queue, skb);
650 sk->sk_data_ready(sk, skb->len);
653 pr_debug("lec: about to send %d bytes of data\n", data->len);
654 atm_force_charge(priv->lecd, data->truesize);
655 skb_queue_tail(&sk->sk_receive_queue, data);
656 sk->sk_data_ready(sk, skb->len);
662 /* shamelessly stolen from drivers/net/net_init.c */
663 static int lec_change_mtu(struct net_device *dev, int new_mtu)
665 if ((new_mtu < 68) || (new_mtu > 18190))
671 static void lec_set_multicast_list(struct net_device *dev)
674 * by default, all multicast frames arrive over the bus.
675 * eventually support selective multicast service
680 static void lec_init(struct net_device *dev)
682 dev->change_mtu = lec_change_mtu;
683 dev->open = lec_open;
684 dev->stop = lec_close;
685 dev->hard_start_xmit = lec_start_xmit;
686 dev->tx_timeout = lec_tx_timeout;
688 dev->get_stats = lec_get_stats;
689 dev->set_multicast_list = lec_set_multicast_list;
690 dev->do_ioctl = NULL;
691 printk("%s: Initialized!\n", dev->name);
694 static const unsigned char lec_ctrl_magic[] = {
701 #define LEC_DATA_DIRECT_8023 2
702 #define LEC_DATA_DIRECT_8025 3
704 static int lec_is_data_direct(struct atm_vcc *vcc)
706 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
707 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
710 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
713 struct net_device *dev = (struct net_device *)vcc->proto_data;
714 struct lec_priv *priv = (struct lec_priv *)dev->priv;
720 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
724 pr_debug("%s: null skb\n", dev->name);
725 lec_vcc_close(priv, vcc);
729 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
730 skb->len, priv->lecid);
731 #if DUMP_PACKETS >= 2
732 for (i = 0; i < skb->len && i < 99; i++) {
733 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
735 #elif DUMP_PACKETS >= 1
736 for (i = 0; i < skb->len && i < 30; i++) {
737 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
739 #endif /* DUMP_PACKETS >= 1 */
743 printk("%s...\n", buf);
744 #endif /* DUMP_PACKETS > 0 */
745 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
746 struct sock *sk = sk_atm(vcc);
748 pr_debug("%s: To daemon\n", dev->name);
749 skb_queue_tail(&sk->sk_receive_queue, skb);
750 sk->sk_data_ready(sk, skb->len);
751 } else { /* Data frame, queue to protocol handlers */
752 struct lec_arp_table *entry;
753 unsigned char *src, *dst;
755 atm_return(vcc, skb->truesize);
756 if (*(__be16 *) skb->data == htons(priv->lecid) ||
757 !priv->lecd || !(dev->flags & IFF_UP)) {
759 * Probably looping back, or if lecd is missing,
762 pr_debug("Ignoring frame...\n");
768 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
771 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
774 * If this is a Data Direct VCC, and the VCC does not match
775 * the LE_ARP cache entry, delete the LE_ARP cache entry.
777 spin_lock_irqsave(&priv->lec_arp_lock, flags);
778 if (lec_is_data_direct(vcc)) {
782 ((struct lecdatahdr_8025 *)skb->data)->
787 ((struct lecdatahdr_8023 *)skb->data)->
789 entry = lec_arp_find(priv, src);
790 if (entry && entry->vcc != vcc) {
791 lec_arp_remove(priv, entry);
795 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
797 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
798 !priv->is_proxy && /* Proxy wants all the packets */
799 memcmp(dst, dev->dev_addr, dev->addr_len)) {
803 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
804 lec_arp_check_empties(priv, vcc, skb);
806 skb_pull(skb, 2); /* skip lec_id */
809 skb->protocol = tr_type_trans(skb, dev);
812 skb->protocol = eth_type_trans(skb, dev);
813 priv->stats.rx_packets++;
814 priv->stats.rx_bytes += skb->len;
815 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
820 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
822 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
823 struct net_device *dev = skb->dev;
826 printk("lec_pop(): vpriv = NULL!?!?!?\n");
830 vpriv->old_pop(vcc, skb);
832 if (vpriv->xoff && atm_may_send(vcc, 0)) {
834 if (netif_running(dev) && netif_queue_stopped(dev))
835 netif_wake_queue(dev);
839 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
841 struct lec_vcc_priv *vpriv;
843 struct atmlec_ioc ioc_data;
845 /* Lecd must be up in this case */
846 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
847 if (bytes_left != 0) {
849 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
852 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
853 !dev_lec[ioc_data.dev_num])
855 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
858 vpriv->old_pop = vcc->pop;
859 vcc->user_back = vpriv;
861 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
862 &ioc_data, vcc, vcc->push);
863 vcc->proto_data = dev_lec[ioc_data.dev_num];
864 vcc->push = lec_push;
868 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
870 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
872 vcc->proto_data = dev_lec[arg];
873 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
876 /* Initialize device. */
877 static int lecd_attach(struct atm_vcc *vcc, int arg)
880 struct lec_priv *priv;
887 if (arg >= MAX_LEC_ITF)
889 #else /* Reserve the top NUM_TR_DEVS for TR */
890 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
897 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
900 size = sizeof(struct lec_priv);
903 dev_lec[i] = alloc_trdev(size);
906 dev_lec[i] = alloc_etherdev(size);
909 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
910 if (register_netdev(dev_lec[i])) {
911 free_netdev(dev_lec[i]);
915 priv = dev_lec[i]->priv;
916 priv->is_trdev = is_trdev;
917 lec_init(dev_lec[i]);
919 priv = dev_lec[i]->priv;
924 priv->itfnum = i; /* LANE2 addition */
926 vcc->dev = &lecatm_dev;
927 vcc_insert_socket(sk_atm(vcc));
929 vcc->proto_data = dev_lec[i];
930 set_bit(ATM_VF_META, &vcc->flags);
931 set_bit(ATM_VF_READY, &vcc->flags);
933 /* Set default values to these variables */
934 priv->maximum_unknown_frame_count = 1;
935 priv->max_unknown_frame_time = (1 * HZ);
936 priv->vcc_timeout_period = (1200 * HZ);
937 priv->max_retry_count = 1;
938 priv->aging_time = (300 * HZ);
939 priv->forward_delay_time = (15 * HZ);
940 priv->topology_change = 0;
941 priv->arp_response_time = (1 * HZ);
942 priv->flush_timeout = (4 * HZ);
943 priv->path_switching_delay = (6 * HZ);
945 if (dev_lec[i]->flags & IFF_UP) {
946 netif_start_queue(dev_lec[i]);
948 __module_get(THIS_MODULE);
952 #ifdef CONFIG_PROC_FS
953 static char *lec_arp_get_status_string(unsigned char status)
955 static char *lec_arp_status_string[] = {
960 "ESI_FLUSH_PENDING ",
964 if (status > ESI_FORWARD_DIRECT)
965 status = 3; /* ESI_UNDEFINED */
966 return lec_arp_status_string[status];
969 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
973 for (i = 0; i < ETH_ALEN; i++)
974 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
975 seq_printf(seq, " ");
976 for (i = 0; i < ATM_ESA_LEN; i++)
977 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
978 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
979 entry->flags & 0xffff);
981 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
983 seq_printf(seq, " ");
984 if (entry->recv_vcc) {
985 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
986 entry->recv_vcc->vci);
993 struct lec_priv *locked;
994 struct hlist_node *node;
995 struct net_device *dev;
1001 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1004 struct hlist_node *e = state->node;
1005 struct lec_arp_table *tmp;
1009 if (e == SEQ_START_TOKEN) {
1014 hlist_for_each_entry_from(tmp, e, next) {
1020 return (*l < 0) ? state : NULL;
1023 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1024 struct lec_priv *priv)
1029 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1030 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1034 state->arp_table = p;
1038 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1039 struct lec_priv *priv)
1041 struct hlist_head *lec_misc_tables[] = {
1042 &priv->lec_arp_empty_ones,
1043 &priv->lec_no_forward,
1049 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1050 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1054 state->misc_table = q;
1058 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1059 struct lec_priv *priv)
1061 if (!state->locked) {
1062 state->locked = priv;
1063 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1065 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1066 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1067 state->locked = NULL;
1068 /* Partial state reset for the next time we get called */
1069 state->arp_table = state->misc_table = 0;
1071 return state->locked;
1074 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1076 struct net_device *dev;
1079 dev = state->dev ? state->dev : dev_lec[state->itf];
1080 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1083 /* Partial state reset for the next time we get called */
1090 static void *lec_get_idx(struct lec_state *state, loff_t l)
1094 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1095 v = lec_itf_walk(state, &l);
1102 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1104 struct lec_state *state = seq->private;
1108 state->locked = NULL;
1109 state->arp_table = 0;
1110 state->misc_table = 0;
1111 state->node = SEQ_START_TOKEN;
1113 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
1116 static void lec_seq_stop(struct seq_file *seq, void *v)
1118 struct lec_state *state = seq->private;
1121 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1123 dev_put(state->dev);
1127 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1129 struct lec_state *state = seq->private;
1131 v = lec_get_idx(state, 1);
1132 *pos += !!PTR_ERR(v);
1136 static int lec_seq_show(struct seq_file *seq, void *v)
1138 static char lec_banner[] = "Itf MAC ATM destination"
1140 "VPI/VCI Recv VPI/VCI\n";
1142 if (v == SEQ_START_TOKEN)
1143 seq_puts(seq, lec_banner);
1145 struct lec_state *state = seq->private;
1146 struct net_device *dev = state->dev;
1147 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1149 seq_printf(seq, "%s ", dev->name);
1150 lec_info(seq, entry);
1155 static const struct seq_operations lec_seq_ops = {
1156 .start = lec_seq_start,
1157 .next = lec_seq_next,
1158 .stop = lec_seq_stop,
1159 .show = lec_seq_show,
1162 static int lec_seq_open(struct inode *inode, struct file *file)
1164 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1167 static const struct file_operations lec_seq_fops = {
1168 .owner = THIS_MODULE,
1169 .open = lec_seq_open,
1171 .llseek = seq_lseek,
1172 .release = seq_release_private,
1176 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1178 struct atm_vcc *vcc = ATM_SD(sock);
1185 if (!capable(CAP_NET_ADMIN))
1189 return -ENOIOCTLCMD;
1194 err = lecd_attach(vcc, (int)arg);
1196 sock->state = SS_CONNECTED;
1199 err = lec_mcast_attach(vcc, (int)arg);
1202 err = lec_vcc_attach(vcc, (void __user *)arg);
1209 static struct atm_ioctl lane_ioctl_ops = {
1210 .owner = THIS_MODULE,
1211 .ioctl = lane_ioctl,
1214 static int __init lane_module_init(void)
1216 #ifdef CONFIG_PROC_FS
1217 struct proc_dir_entry *p;
1219 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1221 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n");
1226 register_atm_ioctl(&lane_ioctl_ops);
1227 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1231 static void __exit lane_module_cleanup(void)
1234 struct lec_priv *priv;
1236 remove_proc_entry("lec", atm_proc_root);
1238 deregister_atm_ioctl(&lane_ioctl_ops);
1240 for (i = 0; i < MAX_LEC_ITF; i++) {
1241 if (dev_lec[i] != NULL) {
1242 priv = (struct lec_priv *)dev_lec[i]->priv;
1243 unregister_netdev(dev_lec[i]);
1244 free_netdev(dev_lec[i]);
1252 module_init(lane_module_init);
1253 module_exit(lane_module_cleanup);
1256 * LANE2: 3.1.3, LE_RESOLVE.request
1257 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1258 * If sizeoftlvs == NULL the default TLVs associated with with this
1260 * If dst_mac == NULL, targetless LE_ARP will be sent
1262 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1263 u8 **tlvs, u32 *sizeoftlvs)
1265 unsigned long flags;
1266 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1267 struct lec_arp_table *table;
1268 struct sk_buff *skb;
1272 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1273 table = lec_arp_find(priv, dst_mac);
1274 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1278 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1282 *sizeoftlvs = table->sizeoftlvs;
1287 if (sizeoftlvs == NULL)
1288 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1291 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1294 skb->len = *sizeoftlvs;
1295 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1296 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1302 * LANE2: 3.1.4, LE_ASSOCIATE.request
1303 * Associate the *tlvs with the *lan_dst address.
1304 * Will overwrite any previous association
1305 * Returns 1 for success, 0 for failure (out of memory)
1308 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1309 const u8 *tlvs, u32 sizeoftlvs)
1312 struct sk_buff *skb;
1313 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1315 if (compare_ether_addr(lan_dst, dev->dev_addr))
1316 return (0); /* not our mac address */
1318 kfree(priv->tlvs); /* NULL if there was no previous association */
1320 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1321 if (priv->tlvs == NULL)
1323 priv->sizeoftlvs = sizeoftlvs;
1325 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1328 skb->len = sizeoftlvs;
1329 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1330 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1332 printk("lec.c: lane2_associate_req() failed\n");
1334 * If the previous association has changed we must
1335 * somehow notify other LANE entities about the change
1341 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1344 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1345 const u8 *tlvs, u32 sizeoftlvs)
1350 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1352 * Why have the TLVs in LE_ARP entries
1353 * since we do not use them? When you
1354 * uncomment this code, make sure the
1355 * TLVs get freed when entry is killed
1357 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1360 return; /* should not happen */
1364 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1365 if (entry->tlvs == NULL)
1367 entry->sizeoftlvs = sizeoftlvs;
1370 printk("lec.c: lane2_associate_ind()\n");
1371 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1372 while (i < sizeoftlvs)
1373 printk("%02x ", tlvs[i++]);
1378 /* tell MPOA about the TLVs we saw */
1379 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1380 priv->lane2_ops->associate_indicator(dev, mac_addr,
1387 * Here starts what used to lec_arpc.c
1389 * lec_arpc.c was added here when making
1390 * lane client modular. October 1997
1393 #include <linux/types.h>
1394 #include <linux/timer.h>
1395 #include <asm/param.h>
1396 #include <asm/atomic.h>
1397 #include <linux/inetdevice.h>
1398 #include <net/route.h>
1401 #define pr_debug(format,args...)
1403 #define pr_debug printk
1406 #define DEBUG_ARP_TABLE 0
1408 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1410 static void lec_arp_check_expire(struct work_struct *work);
1411 static void lec_arp_expire_arp(unsigned long data);
1417 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1420 * Initialization of arp-cache
1422 static void lec_arp_init(struct lec_priv *priv)
1426 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1427 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1429 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1430 INIT_HLIST_HEAD(&priv->lec_no_forward);
1431 INIT_HLIST_HEAD(&priv->mcast_fwds);
1432 spin_lock_init(&priv->lec_arp_lock);
1433 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1434 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1437 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1440 struct atm_vcc *vcc = entry->vcc;
1441 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1442 struct net_device *dev = (struct net_device *)vcc->proto_data;
1444 vcc->pop = vpriv->old_pop;
1446 netif_wake_queue(dev);
1448 vcc->user_back = NULL;
1449 vcc->push = entry->old_push;
1450 vcc_release_async(vcc, -EPIPE);
1453 if (entry->recv_vcc) {
1454 entry->recv_vcc->push = entry->old_recv_push;
1455 vcc_release_async(entry->recv_vcc, -EPIPE);
1456 entry->recv_vcc = NULL;
1461 * Insert entry to lec_arp_table
1462 * LANE2: Add to the end of the list to satisfy 8.1.13
1465 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1467 struct hlist_head *tmp;
1469 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1470 hlist_add_head(&entry->next, tmp);
1472 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1473 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1474 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1475 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1479 * Remove entry from lec_arp_table
1482 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1484 struct hlist_node *node;
1485 struct lec_arp_table *entry;
1486 int i, remove_vcc = 1;
1492 hlist_del(&to_remove->next);
1493 del_timer(&to_remove->timer);
1495 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1496 if (to_remove->status >= ESI_FLUSH_PENDING) {
1498 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1500 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1501 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1502 if (memcmp(to_remove->atm_addr,
1503 entry->atm_addr, ATM_ESA_LEN) == 0) {
1510 lec_arp_clear_vccs(to_remove);
1512 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1514 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1515 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1516 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1517 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1522 static char *get_status_string(unsigned char st)
1526 return "ESI_UNKNOWN";
1527 case ESI_ARP_PENDING:
1528 return "ESI_ARP_PENDING";
1529 case ESI_VC_PENDING:
1530 return "ESI_VC_PENDING";
1531 case ESI_FLUSH_PENDING:
1532 return "ESI_FLUSH_PENDING";
1533 case ESI_FORWARD_DIRECT:
1534 return "ESI_FORWARD_DIRECT";
1540 static void dump_arp_table(struct lec_priv *priv)
1542 struct hlist_node *node;
1543 struct lec_arp_table *rulla;
1547 printk("Dump %p:\n", priv);
1548 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1549 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1551 offset += sprintf(buf, "%d: %p\n", i, rulla);
1552 offset += sprintf(buf + offset, "Mac:");
1553 for (j = 0; j < ETH_ALEN; j++) {
1554 offset += sprintf(buf + offset,
1556 rulla->mac_addr[j] & 0xff);
1558 offset += sprintf(buf + offset, "Atm:");
1559 for (j = 0; j < ATM_ESA_LEN; j++) {
1560 offset += sprintf(buf + offset,
1562 rulla->atm_addr[j] & 0xff);
1564 offset += sprintf(buf + offset,
1565 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1566 rulla->vcc ? rulla->vcc->vpi : 0,
1567 rulla->vcc ? rulla->vcc->vci : 0,
1568 rulla->recv_vcc ? rulla->recv_vcc->
1570 rulla->recv_vcc ? rulla->recv_vcc->
1571 vci : 0, rulla->last_used,
1572 rulla->timestamp, rulla->no_tries);
1574 sprintf(buf + offset,
1575 "Flags:%x, Packets_flooded:%x, Status: %s ",
1576 rulla->flags, rulla->packets_flooded,
1577 get_status_string(rulla->status));
1578 printk("%s\n", buf);
1582 if (!hlist_empty(&priv->lec_no_forward))
1583 printk("No forward\n");
1584 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1586 offset += sprintf(buf + offset, "Mac:");
1587 for (j = 0; j < ETH_ALEN; j++) {
1588 offset += sprintf(buf + offset, "%2.2x ",
1589 rulla->mac_addr[j] & 0xff);
1591 offset += sprintf(buf + offset, "Atm:");
1592 for (j = 0; j < ATM_ESA_LEN; j++) {
1593 offset += sprintf(buf + offset, "%2.2x ",
1594 rulla->atm_addr[j] & 0xff);
1596 offset += sprintf(buf + offset,
1597 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1598 rulla->vcc ? rulla->vcc->vpi : 0,
1599 rulla->vcc ? rulla->vcc->vci : 0,
1600 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1601 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1603 rulla->timestamp, rulla->no_tries);
1604 offset += sprintf(buf + offset,
1605 "Flags:%x, Packets_flooded:%x, Status: %s ",
1606 rulla->flags, rulla->packets_flooded,
1607 get_status_string(rulla->status));
1608 printk("%s\n", buf);
1611 if (!hlist_empty(&priv->lec_arp_empty_ones))
1612 printk("Empty ones\n");
1613 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1615 offset += sprintf(buf + offset, "Mac:");
1616 for (j = 0; j < ETH_ALEN; j++) {
1617 offset += sprintf(buf + offset, "%2.2x ",
1618 rulla->mac_addr[j] & 0xff);
1620 offset += sprintf(buf + offset, "Atm:");
1621 for (j = 0; j < ATM_ESA_LEN; j++) {
1622 offset += sprintf(buf + offset, "%2.2x ",
1623 rulla->atm_addr[j] & 0xff);
1625 offset += sprintf(buf + offset,
1626 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1627 rulla->vcc ? rulla->vcc->vpi : 0,
1628 rulla->vcc ? rulla->vcc->vci : 0,
1629 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1630 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1632 rulla->timestamp, rulla->no_tries);
1633 offset += sprintf(buf + offset,
1634 "Flags:%x, Packets_flooded:%x, Status: %s ",
1635 rulla->flags, rulla->packets_flooded,
1636 get_status_string(rulla->status));
1640 if (!hlist_empty(&priv->mcast_fwds))
1641 printk("Multicast Forward VCCs\n");
1642 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1644 offset += sprintf(buf + offset, "Mac:");
1645 for (j = 0; j < ETH_ALEN; j++) {
1646 offset += sprintf(buf + offset, "%2.2x ",
1647 rulla->mac_addr[j] & 0xff);
1649 offset += sprintf(buf + offset, "Atm:");
1650 for (j = 0; j < ATM_ESA_LEN; j++) {
1651 offset += sprintf(buf + offset, "%2.2x ",
1652 rulla->atm_addr[j] & 0xff);
1654 offset += sprintf(buf + offset,
1655 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1656 rulla->vcc ? rulla->vcc->vpi : 0,
1657 rulla->vcc ? rulla->vcc->vci : 0,
1658 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1659 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1661 rulla->timestamp, rulla->no_tries);
1662 offset += sprintf(buf + offset,
1663 "Flags:%x, Packets_flooded:%x, Status: %s ",
1664 rulla->flags, rulla->packets_flooded,
1665 get_status_string(rulla->status));
1666 printk("%s\n", buf);
1671 #define dump_arp_table(priv) do { } while (0)
1675 * Destruction of arp-cache
1677 static void lec_arp_destroy(struct lec_priv *priv)
1679 unsigned long flags;
1680 struct hlist_node *node, *next;
1681 struct lec_arp_table *entry;
1684 cancel_rearming_delayed_work(&priv->lec_arp_work);
1687 * Remove all entries
1690 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1691 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1692 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1693 lec_arp_remove(priv, entry);
1696 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1699 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1700 del_timer_sync(&entry->timer);
1701 lec_arp_clear_vccs(entry);
1702 hlist_del(&entry->next);
1705 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1707 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1708 del_timer_sync(&entry->timer);
1709 lec_arp_clear_vccs(entry);
1710 hlist_del(&entry->next);
1713 INIT_HLIST_HEAD(&priv->lec_no_forward);
1715 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1716 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1717 lec_arp_clear_vccs(entry);
1718 hlist_del(&entry->next);
1721 INIT_HLIST_HEAD(&priv->mcast_fwds);
1722 priv->mcast_vcc = NULL;
1723 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1727 * Find entry by mac_address
1729 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1730 const unsigned char *mac_addr)
1732 struct hlist_node *node;
1733 struct hlist_head *head;
1734 struct lec_arp_table *entry;
1736 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1737 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1738 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1740 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1741 hlist_for_each_entry(entry, node, head, next) {
1742 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1749 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1750 const unsigned char *mac_addr)
1752 struct lec_arp_table *to_return;
1754 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1756 printk("LEC: Arp entry kmalloc failed\n");
1759 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1760 INIT_HLIST_NODE(&to_return->next);
1761 setup_timer(&to_return->timer, lec_arp_expire_arp,
1762 (unsigned long)to_return);
1763 to_return->last_used = jiffies;
1764 to_return->priv = priv;
1765 skb_queue_head_init(&to_return->tx_wait);
1766 atomic_set(&to_return->usage, 1);
1770 /* Arp sent timer expired */
1771 static void lec_arp_expire_arp(unsigned long data)
1773 struct lec_arp_table *entry;
1775 entry = (struct lec_arp_table *)data;
1777 pr_debug("lec_arp_expire_arp\n");
1778 if (entry->status == ESI_ARP_PENDING) {
1779 if (entry->no_tries <= entry->priv->max_retry_count) {
1780 if (entry->is_rdesc)
1781 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1782 entry->mac_addr, NULL, NULL);
1784 send_to_lecd(entry->priv, l_arp_xmt,
1785 entry->mac_addr, NULL, NULL);
1788 mod_timer(&entry->timer, jiffies + (1 * HZ));
1792 /* Unknown/unused vcc expire, remove associated entry */
1793 static void lec_arp_expire_vcc(unsigned long data)
1795 unsigned long flags;
1796 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1797 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1799 del_timer(&to_remove->timer);
1801 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1803 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1804 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1806 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1807 hlist_del(&to_remove->next);
1808 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1810 lec_arp_clear_vccs(to_remove);
1811 lec_arp_put(to_remove);
1817 * 2. For each entry, delete entries that have aged past the age limit.
1818 * 3. For each entry, depending on the status of the entry, perform
1819 * the following maintenance.
1820 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1821 * tick_count is above the max_unknown_frame_time, clear
1822 * the tick_count to zero and clear the packets_flooded counter
1823 * to zero. This supports the packet rate limit per address
1824 * while flooding unknowns.
1825 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1826 * than or equal to the path_switching_delay, change the status
1827 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1828 * regardless of the progress of the flush protocol.
1830 static void lec_arp_check_expire(struct work_struct *work)
1832 unsigned long flags;
1833 struct lec_priv *priv =
1834 container_of(work, struct lec_priv, lec_arp_work.work);
1835 struct hlist_node *node, *next;
1836 struct lec_arp_table *entry;
1838 unsigned long time_to_check;
1841 pr_debug("lec_arp_check_expire %p\n", priv);
1844 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1845 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1846 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1847 if ((entry->flags) & LEC_REMOTE_FLAG &&
1848 priv->topology_change)
1849 time_to_check = priv->forward_delay_time;
1851 time_to_check = priv->aging_time;
1853 pr_debug("About to expire: %lx - %lx > %lx\n",
1854 now, entry->last_used, time_to_check);
1855 if (time_after(now, entry->last_used + time_to_check)
1856 && !(entry->flags & LEC_PERMANENT_FLAG)
1857 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1859 pr_debug("LEC:Entry timed out\n");
1860 lec_arp_remove(priv, entry);
1863 /* Something else */
1864 if ((entry->status == ESI_VC_PENDING ||
1865 entry->status == ESI_ARP_PENDING)
1866 && time_after_eq(now,
1869 max_unknown_frame_time)) {
1870 entry->timestamp = jiffies;
1871 entry->packets_flooded = 0;
1872 if (entry->status == ESI_VC_PENDING)
1873 send_to_lecd(priv, l_svc_setup,
1878 if (entry->status == ESI_FLUSH_PENDING
1880 time_after_eq(now, entry->timestamp +
1881 priv->path_switching_delay)) {
1882 struct sk_buff *skb;
1883 struct atm_vcc *vcc = entry->vcc;
1885 lec_arp_hold(entry);
1886 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1887 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1888 lec_send(vcc, skb, entry->priv);
1889 entry->last_used = jiffies;
1890 entry->status = ESI_FORWARD_DIRECT;
1897 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1899 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1903 * Try to find vcc where mac_address is attached.
1906 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1907 const unsigned char *mac_to_find, int is_rdesc,
1908 struct lec_arp_table **ret_entry)
1910 unsigned long flags;
1911 struct lec_arp_table *entry;
1912 struct atm_vcc *found;
1914 if (mac_to_find[0] & 0x01) {
1915 switch (priv->lane_version) {
1917 return priv->mcast_vcc;
1918 case 2: /* LANE2 wants arp for multicast addresses */
1919 if (!compare_ether_addr(mac_to_find, bus_mac))
1920 return priv->mcast_vcc;
1927 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1928 entry = lec_arp_find(priv, mac_to_find);
1931 if (entry->status == ESI_FORWARD_DIRECT) {
1933 entry->last_used = jiffies;
1934 lec_arp_hold(entry);
1940 * If the LE_ARP cache entry is still pending, reset count to 0
1941 * so another LE_ARP request can be made for this frame.
1943 if (entry->status == ESI_ARP_PENDING) {
1944 entry->no_tries = 0;
1947 * Data direct VC not yet set up, check to see if the unknown
1948 * frame count is greater than the limit. If the limit has
1949 * not been reached, allow the caller to send packet to
1952 if (entry->status != ESI_FLUSH_PENDING &&
1953 entry->packets_flooded <
1954 priv->maximum_unknown_frame_count) {
1955 entry->packets_flooded++;
1956 pr_debug("LEC_ARP: Flooding..\n");
1957 found = priv->mcast_vcc;
1961 * We got here because entry->status == ESI_FLUSH_PENDING
1962 * or BUS flood limit was reached for an entry which is
1963 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1965 lec_arp_hold(entry);
1967 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1971 /* No matching entry was found */
1972 entry = make_entry(priv, mac_to_find);
1973 pr_debug("LEC_ARP: Making entry\n");
1975 found = priv->mcast_vcc;
1978 lec_arp_add(priv, entry);
1979 /* We want arp-request(s) to be sent */
1980 entry->packets_flooded = 1;
1981 entry->status = ESI_ARP_PENDING;
1982 entry->no_tries = 1;
1983 entry->last_used = entry->timestamp = jiffies;
1984 entry->is_rdesc = is_rdesc;
1985 if (entry->is_rdesc)
1986 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1989 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1990 entry->timer.expires = jiffies + (1 * HZ);
1991 entry->timer.function = lec_arp_expire_arp;
1992 add_timer(&entry->timer);
1993 found = priv->mcast_vcc;
1997 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2002 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
2003 unsigned long permanent)
2005 unsigned long flags;
2006 struct hlist_node *node, *next;
2007 struct lec_arp_table *entry;
2010 pr_debug("lec_addr_delete\n");
2011 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2012 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2013 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2014 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2016 !(entry->flags & LEC_PERMANENT_FLAG))) {
2017 lec_arp_remove(priv, entry);
2020 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2024 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2029 * Notifies: Response to arp_request (atm_addr != NULL)
2032 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
2033 const unsigned char *atm_addr, unsigned long remoteflag,
2034 unsigned int targetless_le_arp)
2036 unsigned long flags;
2037 struct hlist_node *node, *next;
2038 struct lec_arp_table *entry, *tmp;
2041 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2042 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2043 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2044 mac_addr[4], mac_addr[5]);
2046 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2047 entry = lec_arp_find(priv, mac_addr);
2048 if (entry == NULL && targetless_le_arp)
2050 * LANE2: ignore targetless LE_ARPs for which
2051 * we have no entry in the cache. 7.1.30
2053 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2054 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2055 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2056 hlist_del(&entry->next);
2057 del_timer(&entry->timer);
2058 tmp = lec_arp_find(priv, mac_addr);
2060 del_timer(&tmp->timer);
2061 tmp->status = ESI_FORWARD_DIRECT;
2062 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2063 tmp->vcc = entry->vcc;
2064 tmp->old_push = entry->old_push;
2065 tmp->last_used = jiffies;
2066 del_timer(&entry->timer);
2070 entry->status = ESI_FORWARD_DIRECT;
2071 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2072 entry->last_used = jiffies;
2073 lec_arp_add(priv, entry);
2076 entry->flags |= LEC_REMOTE_FLAG;
2078 entry->flags &= ~LEC_REMOTE_FLAG;
2079 pr_debug("After update\n");
2080 dump_arp_table(priv);
2086 entry = lec_arp_find(priv, mac_addr);
2088 entry = make_entry(priv, mac_addr);
2091 entry->status = ESI_UNKNOWN;
2092 lec_arp_add(priv, entry);
2093 /* Temporary, changes before end of function */
2095 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2096 del_timer(&entry->timer);
2097 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2098 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2100 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2101 /* Vcc to this host exists */
2102 if (tmp->status > ESI_VC_PENDING) {
2104 * ESI_FLUSH_PENDING,
2105 * ESI_FORWARD_DIRECT
2107 entry->vcc = tmp->vcc;
2108 entry->old_push = tmp->old_push;
2110 entry->status = tmp->status;
2116 entry->flags |= LEC_REMOTE_FLAG;
2118 entry->flags &= ~LEC_REMOTE_FLAG;
2119 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2120 entry->status = ESI_VC_PENDING;
2121 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2123 pr_debug("After update2\n");
2124 dump_arp_table(priv);
2126 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2130 * Notifies: Vcc setup ready
2133 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
2134 struct atm_vcc *vcc,
2135 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2137 unsigned long flags;
2138 struct hlist_node *node;
2139 struct lec_arp_table *entry;
2140 int i, found_entry = 0;
2142 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2143 if (ioc_data->receive == 2) {
2144 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2146 pr_debug("LEC_ARP: Attaching mcast forward\n");
2148 entry = lec_arp_find(priv, bus_mac);
2150 printk("LEC_ARP: Multicast entry not found!\n");
2153 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2154 entry->recv_vcc = vcc;
2155 entry->old_recv_push = old_push;
2157 entry = make_entry(priv, bus_mac);
2160 del_timer(&entry->timer);
2161 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2162 entry->recv_vcc = vcc;
2163 entry->old_recv_push = old_push;
2164 hlist_add_head(&entry->next, &priv->mcast_fwds);
2166 } else if (ioc_data->receive == 1) {
2168 * Vcc which we don't want to make default vcc,
2172 ("LEC_ARP:Attaching data direct, not default: "
2173 "%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",
2174 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2175 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2176 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2177 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2178 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2179 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2180 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2181 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2182 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2183 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2184 entry = make_entry(priv, bus_mac);
2187 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2188 memset(entry->mac_addr, 0, ETH_ALEN);
2189 entry->recv_vcc = vcc;
2190 entry->old_recv_push = old_push;
2191 entry->status = ESI_UNKNOWN;
2192 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2193 entry->timer.function = lec_arp_expire_vcc;
2194 hlist_add_head(&entry->next, &priv->lec_no_forward);
2195 add_timer(&entry->timer);
2196 dump_arp_table(priv);
2200 ("LEC_ARP:Attaching data direct, default: "
2201 "%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",
2202 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2203 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2204 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2205 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2206 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2207 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2208 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2209 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2210 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2211 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2212 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2213 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2215 (ioc_data->atm_addr, entry->atm_addr,
2216 ATM_ESA_LEN) == 0) {
2217 pr_debug("LEC_ARP: Attaching data direct\n");
2218 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2219 entry->vcc ? entry->vcc->vci : 0,
2220 entry->recv_vcc ? entry->recv_vcc->
2223 del_timer(&entry->timer);
2225 entry->old_push = old_push;
2226 if (entry->status == ESI_VC_PENDING) {
2227 if (priv->maximum_unknown_frame_count
2232 entry->timestamp = jiffies;
2236 send_to_lecd(priv, l_flush_xmt,
2244 * They were forming a connection
2245 * to us, and we to them. Our
2246 * ATM address is numerically lower
2247 * than theirs, so we make connection
2248 * we formed into default VCC (8.1.11).
2249 * Connection they made gets torn
2250 * down. This might confuse some
2251 * clients. Can be changed if
2252 * someone reports trouble...
2260 pr_debug("After vcc was added\n");
2261 dump_arp_table(priv);
2265 * Not found, snatch address from first data packet that arrives
2268 entry = make_entry(priv, bus_mac);
2272 entry->old_push = old_push;
2273 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2274 memset(entry->mac_addr, 0, ETH_ALEN);
2275 entry->status = ESI_UNKNOWN;
2276 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2277 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2278 entry->timer.function = lec_arp_expire_vcc;
2279 add_timer(&entry->timer);
2280 pr_debug("After vcc was added\n");
2281 dump_arp_table(priv);
2283 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2286 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2288 unsigned long flags;
2289 struct hlist_node *node;
2290 struct lec_arp_table *entry;
2293 pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2295 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2296 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2297 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2298 if (entry->flush_tran_id == tran_id
2299 && entry->status == ESI_FLUSH_PENDING) {
2300 struct sk_buff *skb;
2301 struct atm_vcc *vcc = entry->vcc;
2303 lec_arp_hold(entry);
2304 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2305 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2306 lec_send(vcc, skb, entry->priv);
2307 entry->last_used = jiffies;
2308 entry->status = ESI_FORWARD_DIRECT;
2310 pr_debug("LEC_ARP: Flushed\n");
2315 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2316 dump_arp_table(priv);
2320 lec_set_flush_tran_id(struct lec_priv *priv,
2321 const unsigned char *atm_addr, unsigned long tran_id)
2323 unsigned long flags;
2324 struct hlist_node *node;
2325 struct lec_arp_table *entry;
2328 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2329 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2330 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2331 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2332 entry->flush_tran_id = tran_id;
2333 pr_debug("Set flush transaction id to %lx for %p\n",
2337 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2340 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2342 unsigned long flags;
2343 unsigned char mac_addr[] = {
2344 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2346 struct lec_arp_table *to_add;
2347 struct lec_vcc_priv *vpriv;
2350 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2353 vpriv->old_pop = vcc->pop;
2354 vcc->user_back = vpriv;
2356 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2357 to_add = make_entry(priv, mac_addr);
2359 vcc->pop = vpriv->old_pop;
2364 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2365 to_add->status = ESI_FORWARD_DIRECT;
2366 to_add->flags |= LEC_PERMANENT_FLAG;
2368 to_add->old_push = vcc->push;
2369 vcc->push = lec_push;
2370 priv->mcast_vcc = vcc;
2371 lec_arp_add(priv, to_add);
2373 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2377 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2379 unsigned long flags;
2380 struct hlist_node *node, *next;
2381 struct lec_arp_table *entry;
2384 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2385 dump_arp_table(priv);
2387 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2389 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2390 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2391 if (vcc == entry->vcc) {
2392 lec_arp_remove(priv, entry);
2394 if (priv->mcast_vcc == vcc) {
2395 priv->mcast_vcc = NULL;
2401 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2402 if (entry->vcc == vcc) {
2403 lec_arp_clear_vccs(entry);
2404 del_timer(&entry->timer);
2405 hlist_del(&entry->next);
2410 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2411 if (entry->recv_vcc == vcc) {
2412 lec_arp_clear_vccs(entry);
2413 del_timer(&entry->timer);
2414 hlist_del(&entry->next);
2419 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2420 if (entry->recv_vcc == vcc) {
2421 lec_arp_clear_vccs(entry);
2422 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2423 hlist_del(&entry->next);
2428 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2429 dump_arp_table(priv);
2433 lec_arp_check_empties(struct lec_priv *priv,
2434 struct atm_vcc *vcc, struct sk_buff *skb)
2436 unsigned long flags;
2437 struct hlist_node *node, *next;
2438 struct lec_arp_table *entry, *tmp;
2439 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2442 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2445 src = tr_hdr->h_source;
2448 src = hdr->h_source;
2450 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2451 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2452 if (vcc == entry->vcc) {
2453 del_timer(&entry->timer);
2454 memcpy(entry->mac_addr, src, ETH_ALEN);
2455 entry->status = ESI_FORWARD_DIRECT;
2456 entry->last_used = jiffies;
2457 /* We might have got an entry */
2458 if ((tmp = lec_arp_find(priv, src))) {
2459 lec_arp_remove(priv, tmp);
2462 hlist_del(&entry->next);
2463 lec_arp_add(priv, entry);
2467 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2469 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2472 MODULE_LICENSE("GPL");