2 * lec.c: Lan Emulation driver
4 * Marko Kiiskila <mkiiskila@yahoo.com>
7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
9 #include <linux/slab.h>
10 #include <linux/kernel.h>
11 #include <linux/bitops.h>
12 #include <linux/capability.h>
14 /* We are ethernet device */
15 #include <linux/if_ether.h>
16 #include <linux/netdevice.h>
17 #include <linux/etherdevice.h>
19 #include <linux/skbuff.h>
21 #include <asm/byteorder.h>
22 #include <linux/uaccess.h>
25 #include <linux/proc_fs.h>
26 #include <linux/spinlock.h>
27 #include <linux/seq_file.h>
30 #include <linux/atmdev.h>
31 #include <linux/atmlec.h>
33 /* Proxy LEC knows about bridging */
34 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
35 #include "../bridge/br_private.h"
37 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #include <linux/module.h>
42 #include <linux/init.h>
46 #include "resources.h"
48 #define DUMP_PACKETS 0 /*
54 #define LEC_UNRES_QUE_LEN 8 /*
55 * number of tx packets to queue for a
56 * single destination while waiting for SVC
59 static int lec_open(struct net_device *dev);
60 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
61 struct net_device *dev);
62 static int lec_close(struct net_device *dev);
63 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
64 const unsigned char *mac_addr);
65 static int lec_arp_remove(struct lec_priv *priv,
66 struct lec_arp_table *to_remove);
68 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
69 const u8 *tlvs, u32 sizeoftlvs);
70 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
71 u8 **tlvs, u32 *sizeoftlvs);
72 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
73 const u8 *tlvs, u32 sizeoftlvs);
75 static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
76 unsigned long permanent);
77 static void lec_arp_check_empties(struct lec_priv *priv,
78 struct atm_vcc *vcc, struct sk_buff *skb);
79 static void lec_arp_destroy(struct lec_priv *priv);
80 static void lec_arp_init(struct lec_priv *priv);
81 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
82 const unsigned char *mac_to_find,
84 struct lec_arp_table **ret_entry);
85 static 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);
89 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
90 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
91 static void lec_set_flush_tran_id(struct lec_priv *priv,
92 const unsigned char *atm_addr,
93 unsigned long tran_id);
94 static void lec_vcc_added(struct lec_priv *priv,
95 const struct atmlec_ioc *ioc_data,
97 void (*old_push)(struct atm_vcc *vcc,
98 struct sk_buff *skb));
99 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
101 /* must be done under lec_arp_lock */
102 static inline void lec_arp_hold(struct lec_arp_table *entry)
104 atomic_inc(&entry->usage);
107 static inline void lec_arp_put(struct lec_arp_table *entry)
109 if (atomic_dec_and_test(&entry->usage))
113 static 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 */
119 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
121 /* Device structures */
122 static struct net_device *dev_lec[MAX_LEC_ITF];
124 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
125 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
128 struct lec_priv *priv;
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
135 buff = skb->data + skb->dev->hard_header_len;
136 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
138 struct sk_buff *skb2;
139 struct atmlec_msg *mesg;
141 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
144 skb2->len = sizeof(struct atmlec_msg);
145 mesg = (struct atmlec_msg *)skb2->data;
146 mesg->type = l_topology_change;
148 mesg->content.normal.flag = *buff & 0x01;
149 /* 0x01 is topology change */
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);
158 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
161 * Open/initialize the netdevice. This is called (in the current kernel)
162 * sometime after booting when the 'ifconfig' program is run.
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.
169 static int lec_open(struct net_device *dev)
171 netif_start_queue(dev);
177 lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
179 struct net_device *dev = skb->dev;
181 ATM_SKB(skb)->vcc = vcc;
182 ATM_SKB(skb)->atm_options = vcc->atm_options;
184 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
185 if (vcc->send(vcc, skb) < 0) {
186 dev->stats.tx_dropped++;
190 dev->stats.tx_packets++;
191 dev->stats.tx_bytes += skb->len;
194 static void lec_tx_timeout(struct net_device *dev)
196 pr_info("%s\n", dev->name);
197 dev->trans_start = jiffies;
198 netif_wake_queue(dev);
201 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
202 struct net_device *dev)
204 struct sk_buff *skb2;
205 struct lec_priv *priv = netdev_priv(dev);
206 struct lecdatahdr_8023 *lec_h;
208 struct lec_arp_table *entry;
213 pr_debug("called\n");
215 pr_info("%s:No lecd attached\n", dev->name);
216 dev->stats.tx_errors++;
217 netif_stop_queue(dev);
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);
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)) {
243 /* Put le header to place */
244 lec_h = (struct lecdatahdr_8023 *)skb->data;
245 lec_h->le_header = htons(priv->lecid);
247 #if DUMP_PACKETS >= 2
248 #define MAX_DUMP_SKB 99
249 #elif DUMP_PACKETS >= 1
250 #define MAX_DUMP_SKB 30
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 */
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,
268 dev->stats.tx_dropped++;
273 skb_put(skb, min_frame_size - skb->len);
276 /* Send to right vcc */
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);
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++;
297 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
298 dev->name, vcc->vpi, vcc->vci);
299 #endif /* DUMP_PACKETS > 0 */
301 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
302 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
308 if (!atm_may_send(vcc, 0)) {
309 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
312 netif_stop_queue(dev);
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.
320 if (atm_may_send(vcc, 0))
321 netif_wake_queue(dev);
327 dev->trans_start = jiffies;
331 /* The inverse routine to net_open(). */
332 static int lec_close(struct net_device *dev)
334 netif_stop_queue(dev);
338 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
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;
346 char *tmp; /* FIXME */
348 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
349 mesg = (struct atmlec_msg *)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) {
355 for (i = 0; i < 6; i++)
356 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
359 for (i = 0; i < 6; i++)
360 dev->dev_addr[i] = 0;
363 lec_addr_delete(priv, mesg->content.normal.atm_addr,
364 mesg->content.normal.flag);
366 case l_topology_change:
367 priv->topology_change = mesg->content.normal.flag;
369 case l_flush_complete:
370 lec_flush_complete(priv, mesg->content.normal.flag);
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);
378 if (mesg->content.normal.no_source_le_narp)
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",
390 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
391 tmp, mesg->sizeoftlvs);
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;
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;
418 case l_flush_tran_id:
419 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
420 mesg->content.normal.flag);
424 (unsigned short)(0xffff & mesg->content.normal.flag);
426 case l_should_bridge:
427 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
429 pr_debug("%s: bridge zeppelin asks about %pM\n",
430 dev->name, mesg->content.proxy.mac_addr);
432 if (br_fdb_test_addr_hook == NULL)
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;
440 pr_debug("%s: entry found, responding to zeppelin\n",
442 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
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);
453 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
456 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
464 static void lec_atm_close(struct atm_vcc *vcc)
467 struct net_device *dev = (struct net_device *)vcc->proto_data;
468 struct lec_priv *priv = netdev_priv(dev);
471 /* Do something needful? */
473 netif_stop_queue(dev);
474 lec_arp_destroy(priv);
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);
483 pr_info("%s: Shut down!\n", dev->name);
484 module_put(THIS_MODULE);
487 static struct atmdev_ops lecdev_ops = {
488 .close = lec_atm_close,
492 static struct atm_dev lecatm_dev = {
495 .number = 999, /* dummy device number */
496 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
500 * LANE2: new argument struct sk_buff *data contains
501 * the LE_ARP based TLVs introduced in the LANE2 spec
504 send_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)
510 struct atmlec_msg *mesg;
512 if (!priv || !priv->lecd)
514 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
517 skb->len = sizeof(struct atmlec_msg);
518 mesg = (struct atmlec_msg *)skb->data;
519 memset(mesg, 0, sizeof(struct atmlec_msg));
522 mesg->sizeoftlvs = data->len;
524 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
526 mesg->content.normal.targetless_le_arp = 1;
528 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
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);
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);
545 /* shamelessly stolen from drivers/net/net_init.c */
546 static int lec_change_mtu(struct net_device *dev, int new_mtu)
548 if ((new_mtu < 68) || (new_mtu > 18190))
554 static void lec_set_multicast_list(struct net_device *dev)
557 * by default, all multicast frames arrive over the bus.
558 * eventually support selective multicast service
562 static 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,
571 static const unsigned char lec_ctrl_magic[] = {
578 #define LEC_DATA_DIRECT_8023 2
579 #define LEC_DATA_DIRECT_8025 3
581 static int lec_is_data_direct(struct atm_vcc *vcc)
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));
587 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
590 struct net_device *dev = (struct net_device *)vcc->proto_data;
591 struct lec_priv *priv = netdev_priv(dev);
594 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
595 dev->name, vcc->vpi, vcc->vci);
598 pr_debug("%s: null skb\n", dev->name);
599 lec_vcc_close(priv, vcc);
602 #if DUMP_PACKETS >= 2
603 #define MAX_SKB_DUMP 99
604 #elif DUMP_PACKETS >= 1
605 #define MAX_SKB_DUMP 30
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);
617 pr_debug("%s: To daemon\n", dev->name);
618 skb_queue_tail(&sk->sk_receive_queue, skb);
619 sk->sk_data_ready(sk);
620 } else { /* Data frame, queue to protocol handlers */
621 struct lec_arp_table *entry;
622 unsigned char *src, *dst;
624 atm_return(vcc, skb->truesize);
625 if (*(__be16 *) skb->data == htons(priv->lecid) ||
626 !priv->lecd || !(dev->flags & IFF_UP)) {
628 * Probably looping back, or if lecd is missing,
631 pr_debug("Ignoring frame...\n");
635 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
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.
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);
650 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
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)) {
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));
669 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
671 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
672 struct net_device *dev = skb->dev;
675 pr_info("vpriv = NULL!?!?!?\n");
679 vpriv->old_pop(vcc, skb);
681 if (vpriv->xoff && atm_may_send(vcc, 0)) {
683 if (netif_running(dev) && netif_queue_stopped(dev))
684 netif_wake_queue(dev);
688 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
690 struct lec_vcc_priv *vpriv;
692 struct atmlec_ioc ioc_data;
694 /* Lecd must be up in this case */
695 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
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])
701 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
705 vpriv->old_pop = vcc->pop;
706 vcc->user_back = vpriv;
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;
715 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
717 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
719 vcc->proto_data = dev_lec[arg];
720 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
723 /* Initialize device. */
724 static int lecd_attach(struct atm_vcc *vcc, int arg)
727 struct lec_priv *priv;
733 if (arg >= MAX_LEC_ITF)
738 size = sizeof(struct lec_priv);
739 dev_lec[i] = alloc_etherdev(size);
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]);
749 priv = netdev_priv(dev_lec[i]);
751 priv = netdev_priv(dev_lec[i]);
756 priv->itfnum = i; /* LANE2 addition */
758 vcc->dev = &lecatm_dev;
759 vcc_insert_socket(sk_atm(vcc));
761 vcc->proto_data = dev_lec[i];
762 set_bit(ATM_VF_META, &vcc->flags);
763 set_bit(ATM_VF_READY, &vcc->flags);
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);
777 if (dev_lec[i]->flags & IFF_UP)
778 netif_start_queue(dev_lec[i]);
779 __module_get(THIS_MODULE);
783 #ifdef CONFIG_PROC_FS
784 static const char *lec_arp_get_status_string(unsigned char status)
786 static const char *const lec_arp_status_string[] = {
791 "ESI_FLUSH_PENDING ",
795 if (status > ESI_FORWARD_DIRECT)
796 status = 3; /* ESI_UNDEFINED */
797 return lec_arp_status_string[status];
800 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
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);
812 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
814 seq_printf(seq, " ");
815 if (entry->recv_vcc) {
816 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
817 entry->recv_vcc->vci);
824 struct lec_priv *locked;
825 struct hlist_node *node;
826 struct net_device *dev;
832 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
835 struct hlist_node *e = state->node;
839 if (e == SEQ_START_TOKEN) {
844 for (; e; e = e->next) {
850 return (*l < 0) ? state : NULL;
853 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
854 struct lec_priv *priv)
859 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
860 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
864 state->arp_table = p;
868 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
869 struct lec_priv *priv)
871 struct hlist_head *lec_misc_tables[] = {
872 &priv->lec_arp_empty_ones,
873 &priv->lec_no_forward,
879 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
880 v = lec_tbl_walk(state, lec_misc_tables[q], l);
884 state->misc_table = q;
888 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
889 struct lec_priv *priv)
891 if (!state->locked) {
892 state->locked = priv;
893 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
895 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
896 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
897 state->locked = NULL;
898 /* Partial state reset for the next time we get called */
899 state->arp_table = state->misc_table = 0;
901 return state->locked;
904 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
906 struct net_device *dev;
909 dev = state->dev ? state->dev : dev_lec[state->itf];
910 v = (dev && netdev_priv(dev)) ?
911 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
914 /* Partial state reset for the next time we get called */
921 static void *lec_get_idx(struct lec_state *state, loff_t l)
925 for (; state->itf < MAX_LEC_ITF; state->itf++) {
926 v = lec_itf_walk(state, &l);
933 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
935 struct lec_state *state = seq->private;
939 state->locked = NULL;
940 state->arp_table = 0;
941 state->misc_table = 0;
942 state->node = SEQ_START_TOKEN;
944 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
947 static void lec_seq_stop(struct seq_file *seq, void *v)
949 struct lec_state *state = seq->private;
952 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
958 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
960 struct lec_state *state = seq->private;
962 v = lec_get_idx(state, 1);
963 *pos += !!PTR_ERR(v);
967 static int lec_seq_show(struct seq_file *seq, void *v)
969 static const char lec_banner[] =
970 "Itf MAC ATM destination"
972 "VPI/VCI Recv VPI/VCI\n";
974 if (v == SEQ_START_TOKEN)
975 seq_puts(seq, lec_banner);
977 struct lec_state *state = seq->private;
978 struct net_device *dev = state->dev;
979 struct lec_arp_table *entry = hlist_entry(state->node,
980 struct lec_arp_table,
983 seq_printf(seq, "%s ", dev->name);
984 lec_info(seq, entry);
989 static const struct seq_operations lec_seq_ops = {
990 .start = lec_seq_start,
991 .next = lec_seq_next,
992 .stop = lec_seq_stop,
993 .show = lec_seq_show,
996 static int lec_seq_open(struct inode *inode, struct file *file)
998 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1001 static const struct file_operations lec_seq_fops = {
1002 .owner = THIS_MODULE,
1003 .open = lec_seq_open,
1005 .llseek = seq_lseek,
1006 .release = seq_release_private,
1010 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1012 struct atm_vcc *vcc = ATM_SD(sock);
1019 if (!capable(CAP_NET_ADMIN))
1023 return -ENOIOCTLCMD;
1028 err = lecd_attach(vcc, (int)arg);
1030 sock->state = SS_CONNECTED;
1033 err = lec_mcast_attach(vcc, (int)arg);
1036 err = lec_vcc_attach(vcc, (void __user *)arg);
1043 static struct atm_ioctl lane_ioctl_ops = {
1044 .owner = THIS_MODULE,
1045 .ioctl = lane_ioctl,
1048 static int __init lane_module_init(void)
1050 #ifdef CONFIG_PROC_FS
1051 struct proc_dir_entry *p;
1053 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1055 pr_err("Unable to initialize /proc/net/atm/lec\n");
1060 register_atm_ioctl(&lane_ioctl_ops);
1061 pr_info("lec.c: initialized\n");
1065 static void __exit lane_module_cleanup(void)
1069 remove_proc_entry("lec", atm_proc_root);
1071 deregister_atm_ioctl(&lane_ioctl_ops);
1073 for (i = 0; i < MAX_LEC_ITF; i++) {
1074 if (dev_lec[i] != NULL) {
1075 unregister_netdev(dev_lec[i]);
1076 free_netdev(dev_lec[i]);
1082 module_init(lane_module_init);
1083 module_exit(lane_module_cleanup);
1086 * LANE2: 3.1.3, LE_RESOLVE.request
1087 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1088 * If sizeoftlvs == NULL the default TLVs associated with with this
1090 * If dst_mac == NULL, targetless LE_ARP will be sent
1092 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1093 u8 **tlvs, u32 *sizeoftlvs)
1095 unsigned long flags;
1096 struct lec_priv *priv = netdev_priv(dev);
1097 struct lec_arp_table *table;
1098 struct sk_buff *skb;
1102 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1103 table = lec_arp_find(priv, dst_mac);
1104 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1108 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1112 *sizeoftlvs = table->sizeoftlvs;
1117 if (sizeoftlvs == NULL)
1118 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1121 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1124 skb->len = *sizeoftlvs;
1125 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1126 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1132 * LANE2: 3.1.4, LE_ASSOCIATE.request
1133 * Associate the *tlvs with the *lan_dst address.
1134 * Will overwrite any previous association
1135 * Returns 1 for success, 0 for failure (out of memory)
1138 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1139 const u8 *tlvs, u32 sizeoftlvs)
1142 struct sk_buff *skb;
1143 struct lec_priv *priv = netdev_priv(dev);
1145 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1146 return 0; /* not our mac address */
1148 kfree(priv->tlvs); /* NULL if there was no previous association */
1150 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1151 if (priv->tlvs == NULL)
1153 priv->sizeoftlvs = sizeoftlvs;
1155 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1158 skb->len = sizeoftlvs;
1159 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1160 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1162 pr_info("lec.c: lane2_associate_req() failed\n");
1164 * If the previous association has changed we must
1165 * somehow notify other LANE entities about the change
1171 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1174 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1175 const u8 *tlvs, u32 sizeoftlvs)
1180 struct lec_priv *priv = netdev_priv(dev);
1182 * Why have the TLVs in LE_ARP entries
1183 * since we do not use them? When you
1184 * uncomment this code, make sure the
1185 * TLVs get freed when entry is killed
1187 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1190 return; /* should not happen */
1194 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1195 if (entry->tlvs == NULL)
1197 entry->sizeoftlvs = sizeoftlvs;
1201 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1202 while (i < sizeoftlvs)
1203 pr_cont("%02x ", tlvs[i++]);
1208 /* tell MPOA about the TLVs we saw */
1209 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1210 priv->lane2_ops->associate_indicator(dev, mac_addr,
1216 * Here starts what used to lec_arpc.c
1218 * lec_arpc.c was added here when making
1219 * lane client modular. October 1997
1222 #include <linux/types.h>
1223 #include <linux/timer.h>
1224 #include <linux/param.h>
1225 #include <linux/atomic.h>
1226 #include <linux/inetdevice.h>
1227 #include <net/route.h>
1230 #define pr_debug(format, args...)
1232 #define pr_debug printk
1235 #define DEBUG_ARP_TABLE 0
1237 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1239 static void lec_arp_check_expire(struct work_struct *work);
1240 static void lec_arp_expire_arp(unsigned long data);
1246 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1249 * Initialization of arp-cache
1251 static void lec_arp_init(struct lec_priv *priv)
1255 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1256 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1257 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1258 INIT_HLIST_HEAD(&priv->lec_no_forward);
1259 INIT_HLIST_HEAD(&priv->mcast_fwds);
1260 spin_lock_init(&priv->lec_arp_lock);
1261 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1262 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1265 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1268 struct atm_vcc *vcc = entry->vcc;
1269 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1270 struct net_device *dev = (struct net_device *)vcc->proto_data;
1272 vcc->pop = vpriv->old_pop;
1274 netif_wake_queue(dev);
1276 vcc->user_back = NULL;
1277 vcc->push = entry->old_push;
1278 vcc_release_async(vcc, -EPIPE);
1281 if (entry->recv_vcc) {
1282 entry->recv_vcc->push = entry->old_recv_push;
1283 vcc_release_async(entry->recv_vcc, -EPIPE);
1284 entry->recv_vcc = NULL;
1289 * Insert entry to lec_arp_table
1290 * LANE2: Add to the end of the list to satisfy 8.1.13
1293 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1295 struct hlist_head *tmp;
1297 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1298 hlist_add_head(&entry->next, tmp);
1300 pr_debug("Added entry:%pM\n", entry->mac_addr);
1304 * Remove entry from lec_arp_table
1307 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1309 struct lec_arp_table *entry;
1310 int i, remove_vcc = 1;
1315 hlist_del(&to_remove->next);
1316 del_timer(&to_remove->timer);
1319 * If this is the only MAC connected to this VCC,
1320 * also tear down the VCC
1322 if (to_remove->status >= ESI_FLUSH_PENDING) {
1324 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1326 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1327 hlist_for_each_entry(entry,
1328 &priv->lec_arp_tables[i], next) {
1329 if (memcmp(to_remove->atm_addr,
1330 entry->atm_addr, ATM_ESA_LEN) == 0) {
1337 lec_arp_clear_vccs(to_remove);
1339 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1341 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1346 static const char *get_status_string(unsigned char st)
1350 return "ESI_UNKNOWN";
1351 case ESI_ARP_PENDING:
1352 return "ESI_ARP_PENDING";
1353 case ESI_VC_PENDING:
1354 return "ESI_VC_PENDING";
1355 case ESI_FLUSH_PENDING:
1356 return "ESI_FLUSH_PENDING";
1357 case ESI_FORWARD_DIRECT:
1358 return "ESI_FORWARD_DIRECT";
1363 static void dump_arp_table(struct lec_priv *priv)
1365 struct lec_arp_table *rulla;
1369 pr_info("Dump %p:\n", priv);
1370 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1371 hlist_for_each_entry(rulla,
1372 &priv->lec_arp_tables[i], next) {
1374 offset += sprintf(buf, "%d: %p\n", i, rulla);
1375 offset += sprintf(buf + offset, "Mac: %pM",
1377 offset += sprintf(buf + offset, " Atm:");
1378 for (j = 0; j < ATM_ESA_LEN; j++) {
1379 offset += sprintf(buf + offset,
1381 rulla->atm_addr[j] & 0xff);
1383 offset += sprintf(buf + offset,
1384 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1385 rulla->vcc ? rulla->vcc->vpi : 0,
1386 rulla->vcc ? rulla->vcc->vci : 0,
1387 rulla->recv_vcc ? rulla->recv_vcc->
1389 rulla->recv_vcc ? rulla->recv_vcc->
1390 vci : 0, rulla->last_used,
1391 rulla->timestamp, rulla->no_tries);
1393 sprintf(buf + offset,
1394 "Flags:%x, Packets_flooded:%x, Status: %s ",
1395 rulla->flags, rulla->packets_flooded,
1396 get_status_string(rulla->status));
1397 pr_info("%s\n", buf);
1401 if (!hlist_empty(&priv->lec_no_forward))
1402 pr_info("No forward\n");
1403 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1405 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1406 offset += sprintf(buf + offset, " Atm:");
1407 for (j = 0; j < ATM_ESA_LEN; j++) {
1408 offset += sprintf(buf + offset, "%2.2x ",
1409 rulla->atm_addr[j] & 0xff);
1411 offset += sprintf(buf + offset,
1412 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1413 rulla->vcc ? rulla->vcc->vpi : 0,
1414 rulla->vcc ? rulla->vcc->vci : 0,
1415 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1416 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1418 rulla->timestamp, rulla->no_tries);
1419 offset += sprintf(buf + offset,
1420 "Flags:%x, Packets_flooded:%x, Status: %s ",
1421 rulla->flags, rulla->packets_flooded,
1422 get_status_string(rulla->status));
1423 pr_info("%s\n", buf);
1426 if (!hlist_empty(&priv->lec_arp_empty_ones))
1427 pr_info("Empty ones\n");
1428 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1430 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1431 offset += sprintf(buf + offset, " Atm:");
1432 for (j = 0; j < ATM_ESA_LEN; j++) {
1433 offset += sprintf(buf + offset, "%2.2x ",
1434 rulla->atm_addr[j] & 0xff);
1436 offset += sprintf(buf + offset,
1437 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1438 rulla->vcc ? rulla->vcc->vpi : 0,
1439 rulla->vcc ? rulla->vcc->vci : 0,
1440 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1441 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1443 rulla->timestamp, rulla->no_tries);
1444 offset += sprintf(buf + offset,
1445 "Flags:%x, Packets_flooded:%x, Status: %s ",
1446 rulla->flags, rulla->packets_flooded,
1447 get_status_string(rulla->status));
1451 if (!hlist_empty(&priv->mcast_fwds))
1452 pr_info("Multicast Forward VCCs\n");
1453 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1455 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1456 offset += sprintf(buf + offset, " Atm:");
1457 for (j = 0; j < ATM_ESA_LEN; j++) {
1458 offset += sprintf(buf + offset, "%2.2x ",
1459 rulla->atm_addr[j] & 0xff);
1461 offset += sprintf(buf + offset,
1462 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1463 rulla->vcc ? rulla->vcc->vpi : 0,
1464 rulla->vcc ? rulla->vcc->vci : 0,
1465 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1466 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1468 rulla->timestamp, rulla->no_tries);
1469 offset += sprintf(buf + offset,
1470 "Flags:%x, Packets_flooded:%x, Status: %s ",
1471 rulla->flags, rulla->packets_flooded,
1472 get_status_string(rulla->status));
1473 pr_info("%s\n", buf);
1478 #define dump_arp_table(priv) do { } while (0)
1482 * Destruction of arp-cache
1484 static void lec_arp_destroy(struct lec_priv *priv)
1486 unsigned long flags;
1487 struct hlist_node *next;
1488 struct lec_arp_table *entry;
1491 cancel_delayed_work_sync(&priv->lec_arp_work);
1494 * Remove all entries
1497 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1498 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1499 hlist_for_each_entry_safe(entry, next,
1500 &priv->lec_arp_tables[i], next) {
1501 lec_arp_remove(priv, entry);
1504 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1507 hlist_for_each_entry_safe(entry, next,
1508 &priv->lec_arp_empty_ones, next) {
1509 del_timer_sync(&entry->timer);
1510 lec_arp_clear_vccs(entry);
1511 hlist_del(&entry->next);
1514 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1516 hlist_for_each_entry_safe(entry, next,
1517 &priv->lec_no_forward, next) {
1518 del_timer_sync(&entry->timer);
1519 lec_arp_clear_vccs(entry);
1520 hlist_del(&entry->next);
1523 INIT_HLIST_HEAD(&priv->lec_no_forward);
1525 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1526 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1527 lec_arp_clear_vccs(entry);
1528 hlist_del(&entry->next);
1531 INIT_HLIST_HEAD(&priv->mcast_fwds);
1532 priv->mcast_vcc = NULL;
1533 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1537 * Find entry by mac_address
1539 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1540 const unsigned char *mac_addr)
1542 struct hlist_head *head;
1543 struct lec_arp_table *entry;
1545 pr_debug("%pM\n", mac_addr);
1547 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1548 hlist_for_each_entry(entry, head, next) {
1549 if (ether_addr_equal(mac_addr, entry->mac_addr))
1555 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1556 const unsigned char *mac_addr)
1558 struct lec_arp_table *to_return;
1560 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1562 pr_info("LEC: Arp entry kmalloc failed\n");
1565 ether_addr_copy(to_return->mac_addr, mac_addr);
1566 INIT_HLIST_NODE(&to_return->next);
1567 setup_timer(&to_return->timer, lec_arp_expire_arp,
1568 (unsigned long)to_return);
1569 to_return->last_used = jiffies;
1570 to_return->priv = priv;
1571 skb_queue_head_init(&to_return->tx_wait);
1572 atomic_set(&to_return->usage, 1);
1576 /* Arp sent timer expired */
1577 static void lec_arp_expire_arp(unsigned long data)
1579 struct lec_arp_table *entry;
1581 entry = (struct lec_arp_table *)data;
1584 if (entry->status == ESI_ARP_PENDING) {
1585 if (entry->no_tries <= entry->priv->max_retry_count) {
1586 if (entry->is_rdesc)
1587 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1588 entry->mac_addr, NULL, NULL);
1590 send_to_lecd(entry->priv, l_arp_xmt,
1591 entry->mac_addr, NULL, NULL);
1594 mod_timer(&entry->timer, jiffies + (1 * HZ));
1598 /* Unknown/unused vcc expire, remove associated entry */
1599 static void lec_arp_expire_vcc(unsigned long data)
1601 unsigned long flags;
1602 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1603 struct lec_priv *priv = to_remove->priv;
1605 del_timer(&to_remove->timer);
1607 pr_debug("%p %p: vpi:%d vci:%d\n",
1609 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1610 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1612 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1613 hlist_del(&to_remove->next);
1614 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1616 lec_arp_clear_vccs(to_remove);
1617 lec_arp_put(to_remove);
1620 static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1622 struct lec_priv *priv)
1624 unsigned long time_to_check;
1626 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1627 time_to_check = priv->forward_delay_time;
1629 time_to_check = priv->aging_time;
1631 pr_debug("About to expire: %lx - %lx > %lx\n",
1632 now, entry->last_used, time_to_check);
1633 if (time_after(now, entry->last_used + time_to_check) &&
1634 !(entry->flags & LEC_PERMANENT_FLAG) &&
1635 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1637 pr_debug("Entry timed out\n");
1638 lec_arp_remove(priv, entry);
1641 /* Something else */
1642 if ((entry->status == ESI_VC_PENDING ||
1643 entry->status == ESI_ARP_PENDING) &&
1644 time_after_eq(now, entry->timestamp +
1645 priv->max_unknown_frame_time)) {
1646 entry->timestamp = jiffies;
1647 entry->packets_flooded = 0;
1648 if (entry->status == ESI_VC_PENDING)
1649 send_to_lecd(priv, l_svc_setup,
1654 if (entry->status == ESI_FLUSH_PENDING &&
1655 time_after_eq(now, entry->timestamp +
1656 priv->path_switching_delay)) {
1657 lec_arp_hold(entry);
1667 * 2. For each entry, delete entries that have aged past the age limit.
1668 * 3. For each entry, depending on the status of the entry, perform
1669 * the following maintenance.
1670 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1671 * tick_count is above the max_unknown_frame_time, clear
1672 * the tick_count to zero and clear the packets_flooded counter
1673 * to zero. This supports the packet rate limit per address
1674 * while flooding unknowns.
1675 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1676 * than or equal to the path_switching_delay, change the status
1677 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1678 * regardless of the progress of the flush protocol.
1680 static void lec_arp_check_expire(struct work_struct *work)
1682 unsigned long flags;
1683 struct lec_priv *priv =
1684 container_of(work, struct lec_priv, lec_arp_work.work);
1685 struct hlist_node *next;
1686 struct lec_arp_table *entry;
1690 pr_debug("%p\n", priv);
1693 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1694 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1695 hlist_for_each_entry_safe(entry, next,
1696 &priv->lec_arp_tables[i], next) {
1697 if (__lec_arp_check_expire(entry, now, priv)) {
1698 struct sk_buff *skb;
1699 struct atm_vcc *vcc = entry->vcc;
1701 spin_unlock_irqrestore(&priv->lec_arp_lock,
1703 while ((skb = skb_dequeue(&entry->tx_wait)))
1705 entry->last_used = jiffies;
1706 entry->status = ESI_FORWARD_DIRECT;
1713 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1715 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1719 * Try to find vcc where mac_address is attached.
1722 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1723 const unsigned char *mac_to_find,
1725 struct lec_arp_table **ret_entry)
1727 unsigned long flags;
1728 struct lec_arp_table *entry;
1729 struct atm_vcc *found;
1731 if (mac_to_find[0] & 0x01) {
1732 switch (priv->lane_version) {
1734 return priv->mcast_vcc;
1735 case 2: /* LANE2 wants arp for multicast addresses */
1736 if (ether_addr_equal(mac_to_find, bus_mac))
1737 return priv->mcast_vcc;
1744 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1745 entry = lec_arp_find(priv, mac_to_find);
1748 if (entry->status == ESI_FORWARD_DIRECT) {
1750 entry->last_used = jiffies;
1751 lec_arp_hold(entry);
1757 * If the LE_ARP cache entry is still pending, reset count to 0
1758 * so another LE_ARP request can be made for this frame.
1760 if (entry->status == ESI_ARP_PENDING)
1761 entry->no_tries = 0;
1763 * Data direct VC not yet set up, check to see if the unknown
1764 * frame count is greater than the limit. If the limit has
1765 * not been reached, allow the caller to send packet to
1768 if (entry->status != ESI_FLUSH_PENDING &&
1769 entry->packets_flooded <
1770 priv->maximum_unknown_frame_count) {
1771 entry->packets_flooded++;
1772 pr_debug("Flooding..\n");
1773 found = priv->mcast_vcc;
1777 * We got here because entry->status == ESI_FLUSH_PENDING
1778 * or BUS flood limit was reached for an entry which is
1779 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1781 lec_arp_hold(entry);
1783 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1787 /* No matching entry was found */
1788 entry = make_entry(priv, mac_to_find);
1789 pr_debug("Making entry\n");
1791 found = priv->mcast_vcc;
1794 lec_arp_add(priv, entry);
1795 /* We want arp-request(s) to be sent */
1796 entry->packets_flooded = 1;
1797 entry->status = ESI_ARP_PENDING;
1798 entry->no_tries = 1;
1799 entry->last_used = entry->timestamp = jiffies;
1800 entry->is_rdesc = is_rdesc;
1801 if (entry->is_rdesc)
1802 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1805 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1806 entry->timer.expires = jiffies + (1 * HZ);
1807 entry->timer.function = lec_arp_expire_arp;
1808 add_timer(&entry->timer);
1809 found = priv->mcast_vcc;
1813 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1818 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1819 unsigned long permanent)
1821 unsigned long flags;
1822 struct hlist_node *next;
1823 struct lec_arp_table *entry;
1827 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1828 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1829 hlist_for_each_entry_safe(entry, next,
1830 &priv->lec_arp_tables[i], next) {
1831 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1833 !(entry->flags & LEC_PERMANENT_FLAG))) {
1834 lec_arp_remove(priv, entry);
1837 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1841 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1846 * Notifies: Response to arp_request (atm_addr != NULL)
1849 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1850 const unsigned char *atm_addr, unsigned long remoteflag,
1851 unsigned int targetless_le_arp)
1853 unsigned long flags;
1854 struct hlist_node *next;
1855 struct lec_arp_table *entry, *tmp;
1858 pr_debug("%smac:%pM\n",
1859 (targetless_le_arp) ? "targetless " : "", mac_addr);
1861 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1862 entry = lec_arp_find(priv, mac_addr);
1863 if (entry == NULL && targetless_le_arp)
1865 * LANE2: ignore targetless LE_ARPs for which
1866 * we have no entry in the cache. 7.1.30
1868 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1869 hlist_for_each_entry_safe(entry, next,
1870 &priv->lec_arp_empty_ones, next) {
1871 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1872 hlist_del(&entry->next);
1873 del_timer(&entry->timer);
1874 tmp = lec_arp_find(priv, mac_addr);
1876 del_timer(&tmp->timer);
1877 tmp->status = ESI_FORWARD_DIRECT;
1878 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1879 tmp->vcc = entry->vcc;
1880 tmp->old_push = entry->old_push;
1881 tmp->last_used = jiffies;
1882 del_timer(&entry->timer);
1886 entry->status = ESI_FORWARD_DIRECT;
1887 ether_addr_copy(entry->mac_addr,
1889 entry->last_used = jiffies;
1890 lec_arp_add(priv, entry);
1893 entry->flags |= LEC_REMOTE_FLAG;
1895 entry->flags &= ~LEC_REMOTE_FLAG;
1896 pr_debug("After update\n");
1897 dump_arp_table(priv);
1903 entry = lec_arp_find(priv, mac_addr);
1905 entry = make_entry(priv, mac_addr);
1908 entry->status = ESI_UNKNOWN;
1909 lec_arp_add(priv, entry);
1910 /* Temporary, changes before end of function */
1912 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1913 del_timer(&entry->timer);
1914 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1915 hlist_for_each_entry(tmp,
1916 &priv->lec_arp_tables[i], next) {
1918 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1919 /* Vcc to this host exists */
1920 if (tmp->status > ESI_VC_PENDING) {
1922 * ESI_FLUSH_PENDING,
1923 * ESI_FORWARD_DIRECT
1925 entry->vcc = tmp->vcc;
1926 entry->old_push = tmp->old_push;
1928 entry->status = tmp->status;
1934 entry->flags |= LEC_REMOTE_FLAG;
1936 entry->flags &= ~LEC_REMOTE_FLAG;
1937 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1938 entry->status = ESI_VC_PENDING;
1939 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1941 pr_debug("After update2\n");
1942 dump_arp_table(priv);
1944 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1948 * Notifies: Vcc setup ready
1951 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1952 struct atm_vcc *vcc,
1953 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1955 unsigned long flags;
1956 struct lec_arp_table *entry;
1957 int i, found_entry = 0;
1959 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1960 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1961 if (ioc_data->receive == 2) {
1962 pr_debug("LEC_ARP: Attaching mcast forward\n");
1964 entry = lec_arp_find(priv, bus_mac);
1966 pr_info("LEC_ARP: Multicast entry not found!\n");
1969 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1970 entry->recv_vcc = vcc;
1971 entry->old_recv_push = old_push;
1973 entry = make_entry(priv, bus_mac);
1976 del_timer(&entry->timer);
1977 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1978 entry->recv_vcc = vcc;
1979 entry->old_recv_push = old_push;
1980 hlist_add_head(&entry->next, &priv->mcast_fwds);
1982 } else if (ioc_data->receive == 1) {
1984 * Vcc which we don't want to make default vcc,
1987 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",
1988 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1989 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1990 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1991 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1992 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1993 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1994 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1995 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1996 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
1997 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
1998 entry = make_entry(priv, bus_mac);
2001 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2002 memset(entry->mac_addr, 0, ETH_ALEN);
2003 entry->recv_vcc = vcc;
2004 entry->old_recv_push = old_push;
2005 entry->status = ESI_UNKNOWN;
2006 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2007 entry->timer.function = lec_arp_expire_vcc;
2008 hlist_add_head(&entry->next, &priv->lec_no_forward);
2009 add_timer(&entry->timer);
2010 dump_arp_table(priv);
2013 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",
2014 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2015 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2016 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2017 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2018 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2019 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2020 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2021 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2022 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2023 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2024 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2025 hlist_for_each_entry(entry,
2026 &priv->lec_arp_tables[i], next) {
2028 (ioc_data->atm_addr, entry->atm_addr,
2029 ATM_ESA_LEN) == 0) {
2030 pr_debug("LEC_ARP: Attaching data direct\n");
2031 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2032 entry->vcc ? entry->vcc->vci : 0,
2033 entry->recv_vcc ? entry->recv_vcc->
2036 del_timer(&entry->timer);
2038 entry->old_push = old_push;
2039 if (entry->status == ESI_VC_PENDING) {
2040 if (priv->maximum_unknown_frame_count
2045 entry->timestamp = jiffies;
2049 send_to_lecd(priv, l_flush_xmt,
2057 * They were forming a connection
2058 * to us, and we to them. Our
2059 * ATM address is numerically lower
2060 * than theirs, so we make connection
2061 * we formed into default VCC (8.1.11).
2062 * Connection they made gets torn
2063 * down. This might confuse some
2064 * clients. Can be changed if
2065 * someone reports trouble...
2073 pr_debug("After vcc was added\n");
2074 dump_arp_table(priv);
2078 * Not found, snatch address from first data packet that arrives
2081 entry = make_entry(priv, bus_mac);
2085 entry->old_push = old_push;
2086 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2087 memset(entry->mac_addr, 0, ETH_ALEN);
2088 entry->status = ESI_UNKNOWN;
2089 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2090 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2091 entry->timer.function = lec_arp_expire_vcc;
2092 add_timer(&entry->timer);
2093 pr_debug("After vcc was added\n");
2094 dump_arp_table(priv);
2096 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2099 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2101 unsigned long flags;
2102 struct lec_arp_table *entry;
2105 pr_debug("%lx\n", tran_id);
2107 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2108 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2109 hlist_for_each_entry(entry,
2110 &priv->lec_arp_tables[i], next) {
2111 if (entry->flush_tran_id == tran_id &&
2112 entry->status == ESI_FLUSH_PENDING) {
2113 struct sk_buff *skb;
2114 struct atm_vcc *vcc = entry->vcc;
2116 lec_arp_hold(entry);
2117 spin_unlock_irqrestore(&priv->lec_arp_lock,
2119 while ((skb = skb_dequeue(&entry->tx_wait)))
2121 entry->last_used = jiffies;
2122 entry->status = ESI_FORWARD_DIRECT;
2124 pr_debug("LEC_ARP: Flushed\n");
2129 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2130 dump_arp_table(priv);
2134 lec_set_flush_tran_id(struct lec_priv *priv,
2135 const unsigned char *atm_addr, unsigned long tran_id)
2137 unsigned long flags;
2138 struct lec_arp_table *entry;
2141 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2142 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2143 hlist_for_each_entry(entry,
2144 &priv->lec_arp_tables[i], next) {
2145 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2146 entry->flush_tran_id = tran_id;
2147 pr_debug("Set flush transaction id to %lx for %p\n",
2151 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2154 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2156 unsigned long flags;
2157 unsigned char mac_addr[] = {
2158 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2160 struct lec_arp_table *to_add;
2161 struct lec_vcc_priv *vpriv;
2164 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2168 vpriv->old_pop = vcc->pop;
2169 vcc->user_back = vpriv;
2171 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2172 to_add = make_entry(priv, mac_addr);
2174 vcc->pop = vpriv->old_pop;
2179 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2180 to_add->status = ESI_FORWARD_DIRECT;
2181 to_add->flags |= LEC_PERMANENT_FLAG;
2183 to_add->old_push = vcc->push;
2184 vcc->push = lec_push;
2185 priv->mcast_vcc = vcc;
2186 lec_arp_add(priv, to_add);
2188 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2192 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2194 unsigned long flags;
2195 struct hlist_node *next;
2196 struct lec_arp_table *entry;
2199 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2200 dump_arp_table(priv);
2202 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2204 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2205 hlist_for_each_entry_safe(entry, next,
2206 &priv->lec_arp_tables[i], next) {
2207 if (vcc == entry->vcc) {
2208 lec_arp_remove(priv, entry);
2210 if (priv->mcast_vcc == vcc)
2211 priv->mcast_vcc = NULL;
2216 hlist_for_each_entry_safe(entry, next,
2217 &priv->lec_arp_empty_ones, next) {
2218 if (entry->vcc == vcc) {
2219 lec_arp_clear_vccs(entry);
2220 del_timer(&entry->timer);
2221 hlist_del(&entry->next);
2226 hlist_for_each_entry_safe(entry, next,
2227 &priv->lec_no_forward, next) {
2228 if (entry->recv_vcc == vcc) {
2229 lec_arp_clear_vccs(entry);
2230 del_timer(&entry->timer);
2231 hlist_del(&entry->next);
2236 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2237 if (entry->recv_vcc == vcc) {
2238 lec_arp_clear_vccs(entry);
2239 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2240 hlist_del(&entry->next);
2245 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2246 dump_arp_table(priv);
2250 lec_arp_check_empties(struct lec_priv *priv,
2251 struct atm_vcc *vcc, struct sk_buff *skb)
2253 unsigned long flags;
2254 struct hlist_node *next;
2255 struct lec_arp_table *entry, *tmp;
2256 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2257 unsigned char *src = hdr->h_source;
2259 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2260 hlist_for_each_entry_safe(entry, next,
2261 &priv->lec_arp_empty_ones, next) {
2262 if (vcc == entry->vcc) {
2263 del_timer(&entry->timer);
2264 ether_addr_copy(entry->mac_addr, src);
2265 entry->status = ESI_FORWARD_DIRECT;
2266 entry->last_used = jiffies;
2267 /* We might have got an entry */
2268 tmp = lec_arp_find(priv, src);
2270 lec_arp_remove(priv, tmp);
2273 hlist_del(&entry->next);
2274 lec_arp_add(priv, entry);
2278 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2280 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2283 MODULE_LICENSE("GPL");