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 IS_ENABLED(CONFIG_BRIDGE)
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>
44 /* Hardening for Spectre-v1 */
45 #include <linux/nospec.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 netdev_tx_t lec_start_xmit(struct sk_buff *skb,
64 struct net_device *dev);
65 static int lec_close(struct net_device *dev);
66 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
67 const unsigned char *mac_addr);
68 static int lec_arp_remove(struct lec_priv *priv,
69 struct lec_arp_table *to_remove);
71 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
72 const u8 *tlvs, u32 sizeoftlvs);
73 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
74 u8 **tlvs, u32 *sizeoftlvs);
75 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
76 const u8 *tlvs, u32 sizeoftlvs);
78 static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
79 unsigned long permanent);
80 static void lec_arp_check_empties(struct lec_priv *priv,
81 struct atm_vcc *vcc, struct sk_buff *skb);
82 static void lec_arp_destroy(struct lec_priv *priv);
83 static void lec_arp_init(struct lec_priv *priv);
84 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
85 const unsigned char *mac_to_find,
87 struct lec_arp_table **ret_entry);
88 static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
89 const unsigned char *atm_addr,
90 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,
98 const struct atmlec_ioc *ioc_data,
100 void (*old_push)(struct atm_vcc *vcc,
101 struct sk_buff *skb));
102 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
104 /* must be done under lec_arp_lock */
105 static inline void lec_arp_hold(struct lec_arp_table *entry)
107 refcount_inc(&entry->usage);
110 static inline void lec_arp_put(struct lec_arp_table *entry)
112 if (refcount_dec_and_test(&entry->usage))
116 static struct lane2_ops lane2_ops = {
117 .resolve = lane2_resolve, /* spec 3.1.3 */
118 .associate_req = lane2_associate_req, /* spec 3.1.4 */
119 .associate_indicator = NULL /* 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 IS_ENABLED(CONFIG_BRIDGE)
128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
131 struct lec_priv *priv;
134 * Check if this is a BPDU. If so, ask zeppelin to send
135 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
136 * as the Config BPDU has
138 buff = skb->data + skb->dev->hard_header_len;
139 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
141 struct sk_buff *skb2;
142 struct atmlec_msg *mesg;
144 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
147 skb2->len = sizeof(struct atmlec_msg);
148 mesg = (struct atmlec_msg *)skb2->data;
149 mesg->type = l_topology_change;
151 mesg->content.normal.flag = *buff & 0x01;
152 /* 0x01 is topology change */
154 priv = netdev_priv(dev);
155 atm_force_charge(priv->lecd, skb2->truesize);
156 sk = sk_atm(priv->lecd);
157 skb_queue_tail(&sk->sk_receive_queue, skb2);
158 sk->sk_data_ready(sk);
161 #endif /* IS_ENABLED(CONFIG_BRIDGE) */
164 * Open/initialize the netdevice. This is called (in the current kernel)
165 * sometime after booting when the 'ifconfig' program is run.
167 * This routine should set everything up anew at each open, even
168 * registers that "should" only need to be set once at boot, so that
169 * there is non-reboot way to recover if something goes wrong.
172 static int lec_open(struct net_device *dev)
174 netif_start_queue(dev);
180 lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
182 struct net_device *dev = skb->dev;
184 ATM_SKB(skb)->vcc = vcc;
185 atm_account_tx(vcc, skb);
187 if (vcc->send(vcc, skb) < 0) {
188 dev->stats.tx_dropped++;
192 dev->stats.tx_packets++;
193 dev->stats.tx_bytes += skb->len;
196 static void lec_tx_timeout(struct net_device *dev)
198 pr_info("%s\n", dev->name);
199 netif_trans_update(dev);
200 netif_wake_queue(dev);
203 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
204 struct net_device *dev)
206 struct sk_buff *skb2;
207 struct lec_priv *priv = netdev_priv(dev);
208 struct lecdatahdr_8023 *lec_h;
210 struct lec_arp_table *entry;
215 pr_debug("called\n");
217 pr_info("%s:No lecd attached\n", dev->name);
218 dev->stats.tx_errors++;
219 netif_stop_queue(dev);
224 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
225 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
226 (long)skb_end_pointer(skb));
227 #if IS_ENABLED(CONFIG_BRIDGE)
228 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
229 lec_handle_bridge(skb, dev);
232 /* Make sure we have room for lec_id */
233 if (skb_headroom(skb) < 2) {
234 pr_debug("reallocating skb\n");
235 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
236 if (unlikely(!skb2)) {
245 /* Put le header to place */
246 lec_h = (struct lecdatahdr_8023 *)skb->data;
247 lec_h->le_header = htons(priv->lecid);
249 #if DUMP_PACKETS >= 2
250 #define MAX_DUMP_SKB 99
251 #elif DUMP_PACKETS >= 1
252 #define MAX_DUMP_SKB 30
254 #if DUMP_PACKETS >= 1
255 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
256 dev->name, skb->len, priv->lecid);
257 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
258 skb->data, min(skb->len, MAX_DUMP_SKB), true);
259 #endif /* DUMP_PACKETS >= 1 */
261 /* Minimum ethernet-frame size */
262 min_frame_size = LEC_MINIMUM_8023_SIZE;
263 if (skb->len < min_frame_size) {
264 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
265 skb2 = skb_copy_expand(skb, 0,
266 min_frame_size - skb->truesize,
270 dev->stats.tx_dropped++;
275 skb_put(skb, min_frame_size - skb->len);
278 /* Send to right vcc */
282 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
283 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
284 dev->name, vcc, vcc ? vcc->flags : 0, entry);
285 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
286 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
287 pr_debug("%s:queuing packet, MAC address %pM\n",
288 dev->name, lec_h->h_dest);
289 skb_queue_tail(&entry->tx_wait, skb);
291 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
292 dev->name, lec_h->h_dest);
293 dev->stats.tx_dropped++;
299 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
300 dev->name, vcc->vpi, vcc->vci);
301 #endif /* DUMP_PACKETS > 0 */
303 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
304 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
310 if (!atm_may_send(vcc, 0)) {
311 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
314 netif_stop_queue(dev);
317 * vcc->pop() might have occurred in between, making
318 * the vcc usuable again. Since xmit is serialized,
319 * this is the only situation we have to re-test.
322 if (atm_may_send(vcc, 0))
323 netif_wake_queue(dev);
329 netif_trans_update(dev);
333 /* The inverse routine to net_open(). */
334 static int lec_close(struct net_device *dev)
336 netif_stop_queue(dev);
340 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
343 struct net_device *dev = (struct net_device *)vcc->proto_data;
344 struct lec_priv *priv = netdev_priv(dev);
345 struct atmlec_msg *mesg;
346 struct lec_arp_table *entry;
348 char *tmp; /* FIXME */
350 WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
351 mesg = (struct atmlec_msg *)skb->data;
353 tmp += sizeof(struct atmlec_msg);
354 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
355 switch (mesg->type) {
357 for (i = 0; i < 6; i++)
358 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
361 for (i = 0; i < 6; i++)
362 dev->dev_addr[i] = 0;
365 lec_addr_delete(priv, mesg->content.normal.atm_addr,
366 mesg->content.normal.flag);
368 case l_topology_change:
369 priv->topology_change = mesg->content.normal.flag;
371 case l_flush_complete:
372 lec_flush_complete(priv, mesg->content.normal.flag);
374 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
375 spin_lock_irqsave(&priv->lec_arp_lock, flags);
376 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
377 lec_arp_remove(priv, entry);
378 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
380 if (mesg->content.normal.no_source_le_narp)
384 lec_arp_update(priv, mesg->content.normal.mac_addr,
385 mesg->content.normal.atm_addr,
386 mesg->content.normal.flag,
387 mesg->content.normal.targetless_le_arp);
388 pr_debug("in l_arp_update\n");
389 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
390 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
392 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
393 tmp, mesg->sizeoftlvs);
397 priv->maximum_unknown_frame_count =
398 mesg->content.config.maximum_unknown_frame_count;
399 priv->max_unknown_frame_time =
400 (mesg->content.config.max_unknown_frame_time * HZ);
401 priv->max_retry_count = mesg->content.config.max_retry_count;
402 priv->aging_time = (mesg->content.config.aging_time * HZ);
403 priv->forward_delay_time =
404 (mesg->content.config.forward_delay_time * HZ);
405 priv->arp_response_time =
406 (mesg->content.config.arp_response_time * HZ);
407 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
408 priv->path_switching_delay =
409 (mesg->content.config.path_switching_delay * HZ);
410 priv->lane_version = mesg->content.config.lane_version;
412 priv->lane2_ops = NULL;
413 if (priv->lane_version > 1)
414 priv->lane2_ops = &lane2_ops;
416 if (dev_set_mtu(dev, mesg->content.config.mtu))
417 pr_info("%s: change_mtu to %d failed\n",
418 dev->name, mesg->content.config.mtu);
420 priv->is_proxy = mesg->content.config.is_proxy;
422 case l_flush_tran_id:
423 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
424 mesg->content.normal.flag);
428 (unsigned short)(0xffff & mesg->content.normal.flag);
430 case l_should_bridge:
431 #if IS_ENABLED(CONFIG_BRIDGE)
433 pr_debug("%s: bridge zeppelin asks about %pM\n",
434 dev->name, mesg->content.proxy.mac_addr);
436 if (br_fdb_test_addr_hook == NULL)
439 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
440 /* hit from bridge table, send LE_ARP_RESPONSE */
441 struct sk_buff *skb2;
444 pr_debug("%s: entry found, responding to zeppelin\n",
446 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
449 skb2->len = sizeof(struct atmlec_msg);
450 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
451 atm_force_charge(priv->lecd, skb2->truesize);
452 sk = sk_atm(priv->lecd);
453 skb_queue_tail(&sk->sk_receive_queue, skb2);
454 sk->sk_data_ready(sk);
457 #endif /* IS_ENABLED(CONFIG_BRIDGE) */
460 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
468 static void lec_atm_close(struct atm_vcc *vcc)
471 struct net_device *dev = (struct net_device *)vcc->proto_data;
472 struct lec_priv *priv = netdev_priv(dev);
475 /* Do something needful? */
477 netif_stop_queue(dev);
478 lec_arp_destroy(priv);
480 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
481 pr_info("%s closing with messages pending\n", dev->name);
482 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
483 atm_return(vcc, skb->truesize);
487 pr_info("%s: Shut down!\n", dev->name);
488 module_put(THIS_MODULE);
491 static const struct atmdev_ops lecdev_ops = {
492 .close = lec_atm_close,
496 static struct atm_dev lecatm_dev = {
499 .number = 999, /* dummy device number */
500 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
504 * LANE2: new argument struct sk_buff *data contains
505 * the LE_ARP based TLVs introduced in the LANE2 spec
508 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
509 const unsigned char *mac_addr, const unsigned char *atm_addr,
510 struct sk_buff *data)
514 struct atmlec_msg *mesg;
516 if (!priv || !priv->lecd)
518 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
521 skb->len = sizeof(struct atmlec_msg);
522 mesg = (struct atmlec_msg *)skb->data;
523 memset(mesg, 0, sizeof(struct atmlec_msg));
526 mesg->sizeoftlvs = data->len;
528 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
530 mesg->content.normal.targetless_le_arp = 1;
532 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
534 atm_force_charge(priv->lecd, skb->truesize);
535 sk = sk_atm(priv->lecd);
536 skb_queue_tail(&sk->sk_receive_queue, skb);
537 sk->sk_data_ready(sk);
540 pr_debug("about to send %d bytes of data\n", data->len);
541 atm_force_charge(priv->lecd, data->truesize);
542 skb_queue_tail(&sk->sk_receive_queue, data);
543 sk->sk_data_ready(sk);
549 static void lec_set_multicast_list(struct net_device *dev)
552 * by default, all multicast frames arrive over the bus.
553 * eventually support selective multicast service
557 static const struct net_device_ops lec_netdev_ops = {
558 .ndo_open = lec_open,
559 .ndo_stop = lec_close,
560 .ndo_start_xmit = lec_start_xmit,
561 .ndo_tx_timeout = lec_tx_timeout,
562 .ndo_set_rx_mode = lec_set_multicast_list,
565 static const unsigned char lec_ctrl_magic[] = {
572 #define LEC_DATA_DIRECT_8023 2
573 #define LEC_DATA_DIRECT_8025 3
575 static int lec_is_data_direct(struct atm_vcc *vcc)
577 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
578 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
581 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
584 struct net_device *dev = (struct net_device *)vcc->proto_data;
585 struct lec_priv *priv = netdev_priv(dev);
588 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
589 dev->name, vcc->vpi, vcc->vci);
592 pr_debug("%s: null skb\n", dev->name);
593 lec_vcc_close(priv, vcc);
596 #if DUMP_PACKETS >= 2
597 #define MAX_SKB_DUMP 99
598 #elif DUMP_PACKETS >= 1
599 #define MAX_SKB_DUMP 30
602 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
603 dev->name, skb->len, priv->lecid);
604 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
605 skb->data, min(MAX_SKB_DUMP, skb->len), true);
606 #endif /* DUMP_PACKETS > 0 */
607 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
608 /* Control frame, to daemon */
609 struct sock *sk = sk_atm(vcc);
611 pr_debug("%s: To daemon\n", dev->name);
612 skb_queue_tail(&sk->sk_receive_queue, skb);
613 sk->sk_data_ready(sk);
614 } else { /* Data frame, queue to protocol handlers */
615 struct lec_arp_table *entry;
616 unsigned char *src, *dst;
618 atm_return(vcc, skb->truesize);
619 if (*(__be16 *) skb->data == htons(priv->lecid) ||
620 !priv->lecd || !(dev->flags & IFF_UP)) {
622 * Probably looping back, or if lecd is missing,
625 pr_debug("Ignoring frame...\n");
629 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
632 * If this is a Data Direct VCC, and the VCC does not match
633 * the LE_ARP cache entry, delete the LE_ARP cache entry.
635 spin_lock_irqsave(&priv->lec_arp_lock, flags);
636 if (lec_is_data_direct(vcc)) {
637 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
638 entry = lec_arp_find(priv, src);
639 if (entry && entry->vcc != vcc) {
640 lec_arp_remove(priv, entry);
644 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
646 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
647 !priv->is_proxy && /* Proxy wants all the packets */
648 memcmp(dst, dev->dev_addr, dev->addr_len)) {
652 if (!hlist_empty(&priv->lec_arp_empty_ones))
653 lec_arp_check_empties(priv, vcc, skb);
654 skb_pull(skb, 2); /* skip lec_id */
655 skb->protocol = eth_type_trans(skb, dev);
656 dev->stats.rx_packets++;
657 dev->stats.rx_bytes += skb->len;
658 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
663 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
665 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
666 struct net_device *dev = skb->dev;
669 pr_info("vpriv = NULL!?!?!?\n");
673 vpriv->old_pop(vcc, skb);
675 if (vpriv->xoff && atm_may_send(vcc, 0)) {
677 if (netif_running(dev) && netif_queue_stopped(dev))
678 netif_wake_queue(dev);
682 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
684 struct lec_vcc_priv *vpriv;
686 struct atmlec_ioc ioc_data;
688 /* Lecd must be up in this case */
689 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
691 pr_info("copy from user failed for %d bytes\n", bytes_left);
692 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
694 ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF);
695 if (!dev_lec[ioc_data.dev_num])
697 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
701 vpriv->old_pop = vcc->pop;
702 vcc->user_back = vpriv;
704 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
705 &ioc_data, vcc, vcc->push);
706 vcc->proto_data = dev_lec[ioc_data.dev_num];
707 vcc->push = lec_push;
711 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
713 if (arg < 0 || arg >= MAX_LEC_ITF)
715 arg = array_index_nospec(arg, MAX_LEC_ITF);
718 vcc->proto_data = dev_lec[arg];
719 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
722 /* Initialize device. */
723 static int lecd_attach(struct atm_vcc *vcc, int arg)
726 struct lec_priv *priv;
732 if (arg >= MAX_LEC_ITF)
734 i = array_index_nospec(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 dev_lec[i]->max_mtu = 18190;
744 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
745 if (register_netdev(dev_lec[i])) {
746 free_netdev(dev_lec[i]);
750 priv = netdev_priv(dev_lec[i]);
752 priv = netdev_priv(dev_lec[i]);
757 priv->itfnum = i; /* LANE2 addition */
759 vcc->dev = &lecatm_dev;
760 vcc_insert_socket(sk_atm(vcc));
762 vcc->proto_data = dev_lec[i];
763 set_bit(ATM_VF_META, &vcc->flags);
764 set_bit(ATM_VF_READY, &vcc->flags);
766 /* Set default values to these variables */
767 priv->maximum_unknown_frame_count = 1;
768 priv->max_unknown_frame_time = (1 * HZ);
769 priv->vcc_timeout_period = (1200 * HZ);
770 priv->max_retry_count = 1;
771 priv->aging_time = (300 * HZ);
772 priv->forward_delay_time = (15 * HZ);
773 priv->topology_change = 0;
774 priv->arp_response_time = (1 * HZ);
775 priv->flush_timeout = (4 * HZ);
776 priv->path_switching_delay = (6 * HZ);
778 if (dev_lec[i]->flags & IFF_UP)
779 netif_start_queue(dev_lec[i]);
780 __module_get(THIS_MODULE);
784 #ifdef CONFIG_PROC_FS
785 static const char *lec_arp_get_status_string(unsigned char status)
787 static const char *const lec_arp_status_string[] = {
792 "ESI_FLUSH_PENDING ",
796 if (status > ESI_FORWARD_DIRECT)
797 status = 3; /* ESI_UNDEFINED */
798 return lec_arp_status_string[status];
801 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
805 for (i = 0; i < ETH_ALEN; i++)
806 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
807 seq_printf(seq, " ");
808 for (i = 0; i < ATM_ESA_LEN; i++)
809 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
810 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
811 entry->flags & 0xffff);
813 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
815 seq_printf(seq, " ");
816 if (entry->recv_vcc) {
817 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
818 entry->recv_vcc->vci);
825 struct lec_priv *locked;
826 struct hlist_node *node;
827 struct net_device *dev;
833 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
836 struct hlist_node *e = state->node;
840 if (e == SEQ_START_TOKEN) {
845 for (; e; e = e->next) {
851 return (*l < 0) ? state : NULL;
854 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
855 struct lec_priv *priv)
860 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
861 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
865 state->arp_table = p;
869 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
870 struct lec_priv *priv)
872 struct hlist_head *lec_misc_tables[] = {
873 &priv->lec_arp_empty_ones,
874 &priv->lec_no_forward,
880 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
881 v = lec_tbl_walk(state, lec_misc_tables[q], l);
885 state->misc_table = q;
889 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
890 struct lec_priv *priv)
892 if (!state->locked) {
893 state->locked = priv;
894 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
896 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
897 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
898 state->locked = NULL;
899 /* Partial state reset for the next time we get called */
900 state->arp_table = state->misc_table = 0;
902 return state->locked;
905 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
907 struct net_device *dev;
910 dev = state->dev ? state->dev : dev_lec[state->itf];
911 v = (dev && netdev_priv(dev)) ?
912 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
915 /* Partial state reset for the next time we get called */
922 static void *lec_get_idx(struct lec_state *state, loff_t l)
926 for (; state->itf < MAX_LEC_ITF; state->itf++) {
927 v = lec_itf_walk(state, &l);
934 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
936 struct lec_state *state = seq->private;
940 state->locked = NULL;
941 state->arp_table = 0;
942 state->misc_table = 0;
943 state->node = SEQ_START_TOKEN;
945 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
948 static void lec_seq_stop(struct seq_file *seq, void *v)
950 struct lec_state *state = seq->private;
953 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
959 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
961 struct lec_state *state = seq->private;
963 v = lec_get_idx(state, 1);
964 *pos += !!PTR_ERR(v);
968 static int lec_seq_show(struct seq_file *seq, void *v)
970 static const char lec_banner[] =
971 "Itf MAC ATM destination"
973 "VPI/VCI Recv VPI/VCI\n";
975 if (v == SEQ_START_TOKEN)
976 seq_puts(seq, lec_banner);
978 struct lec_state *state = seq->private;
979 struct net_device *dev = state->dev;
980 struct lec_arp_table *entry = hlist_entry(state->node,
981 struct lec_arp_table,
984 seq_printf(seq, "%s ", dev->name);
985 lec_info(seq, entry);
990 static const struct seq_operations lec_seq_ops = {
991 .start = lec_seq_start,
992 .next = lec_seq_next,
993 .stop = lec_seq_stop,
994 .show = lec_seq_show,
997 static int lec_seq_open(struct inode *inode, struct file *file)
999 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1002 static const struct file_operations lec_seq_fops = {
1003 .owner = THIS_MODULE,
1004 .open = lec_seq_open,
1006 .llseek = seq_lseek,
1007 .release = seq_release_private,
1011 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1013 struct atm_vcc *vcc = ATM_SD(sock);
1020 if (!capable(CAP_NET_ADMIN))
1024 return -ENOIOCTLCMD;
1029 err = lecd_attach(vcc, (int)arg);
1031 sock->state = SS_CONNECTED;
1034 err = lec_mcast_attach(vcc, (int)arg);
1037 err = lec_vcc_attach(vcc, (void __user *)arg);
1044 static struct atm_ioctl lane_ioctl_ops = {
1045 .owner = THIS_MODULE,
1046 .ioctl = lane_ioctl,
1049 static int __init lane_module_init(void)
1051 #ifdef CONFIG_PROC_FS
1052 struct proc_dir_entry *p;
1054 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1056 pr_err("Unable to initialize /proc/net/atm/lec\n");
1061 register_atm_ioctl(&lane_ioctl_ops);
1062 pr_info("lec.c: initialized\n");
1066 static void __exit lane_module_cleanup(void)
1070 #ifdef CONFIG_PROC_FS
1071 remove_proc_entry("lec", atm_proc_root);
1074 deregister_atm_ioctl(&lane_ioctl_ops);
1076 for (i = 0; i < MAX_LEC_ITF; i++) {
1077 if (dev_lec[i] != NULL) {
1078 unregister_netdev(dev_lec[i]);
1079 free_netdev(dev_lec[i]);
1085 module_init(lane_module_init);
1086 module_exit(lane_module_cleanup);
1089 * LANE2: 3.1.3, LE_RESOLVE.request
1090 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1091 * If sizeoftlvs == NULL the default TLVs associated with with this
1093 * If dst_mac == NULL, targetless LE_ARP will be sent
1095 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1096 u8 **tlvs, u32 *sizeoftlvs)
1098 unsigned long flags;
1099 struct lec_priv *priv = netdev_priv(dev);
1100 struct lec_arp_table *table;
1101 struct sk_buff *skb;
1105 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1106 table = lec_arp_find(priv, dst_mac);
1107 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1111 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1115 *sizeoftlvs = table->sizeoftlvs;
1120 if (sizeoftlvs == NULL)
1121 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1124 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1127 skb->len = *sizeoftlvs;
1128 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1129 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1135 * LANE2: 3.1.4, LE_ASSOCIATE.request
1136 * Associate the *tlvs with the *lan_dst address.
1137 * Will overwrite any previous association
1138 * Returns 1 for success, 0 for failure (out of memory)
1141 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1142 const u8 *tlvs, u32 sizeoftlvs)
1145 struct sk_buff *skb;
1146 struct lec_priv *priv = netdev_priv(dev);
1148 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1149 return 0; /* not our mac address */
1151 kfree(priv->tlvs); /* NULL if there was no previous association */
1153 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1154 if (priv->tlvs == NULL)
1156 priv->sizeoftlvs = sizeoftlvs;
1158 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1161 skb->len = sizeoftlvs;
1162 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1163 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1165 pr_info("lec.c: lane2_associate_req() failed\n");
1167 * If the previous association has changed we must
1168 * somehow notify other LANE entities about the change
1174 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1177 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1178 const u8 *tlvs, u32 sizeoftlvs)
1183 struct lec_priv *priv = netdev_priv(dev);
1185 * Why have the TLVs in LE_ARP entries
1186 * since we do not use them? When you
1187 * uncomment this code, make sure the
1188 * TLVs get freed when entry is killed
1190 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1193 return; /* should not happen */
1197 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1198 if (entry->tlvs == NULL)
1200 entry->sizeoftlvs = sizeoftlvs;
1204 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1205 while (i < sizeoftlvs)
1206 pr_cont("%02x ", tlvs[i++]);
1211 /* tell MPOA about the TLVs we saw */
1212 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1213 priv->lane2_ops->associate_indicator(dev, mac_addr,
1219 * Here starts what used to lec_arpc.c
1221 * lec_arpc.c was added here when making
1222 * lane client modular. October 1997
1225 #include <linux/types.h>
1226 #include <linux/timer.h>
1227 #include <linux/param.h>
1228 #include <linux/atomic.h>
1229 #include <linux/inetdevice.h>
1230 #include <net/route.h>
1233 #define pr_debug(format, args...)
1235 #define pr_debug printk
1238 #define DEBUG_ARP_TABLE 0
1240 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1242 static void lec_arp_check_expire(struct work_struct *work);
1243 static void lec_arp_expire_arp(unsigned long data);
1249 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1252 * Initialization of arp-cache
1254 static void lec_arp_init(struct lec_priv *priv)
1258 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1259 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1260 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1261 INIT_HLIST_HEAD(&priv->lec_no_forward);
1262 INIT_HLIST_HEAD(&priv->mcast_fwds);
1263 spin_lock_init(&priv->lec_arp_lock);
1264 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1265 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1268 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1271 struct atm_vcc *vcc = entry->vcc;
1272 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1273 struct net_device *dev = (struct net_device *)vcc->proto_data;
1275 vcc->pop = vpriv->old_pop;
1277 netif_wake_queue(dev);
1279 vcc->user_back = NULL;
1280 vcc->push = entry->old_push;
1281 vcc_release_async(vcc, -EPIPE);
1284 if (entry->recv_vcc) {
1285 struct atm_vcc *vcc = entry->recv_vcc;
1286 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1289 vcc->user_back = NULL;
1291 entry->recv_vcc->push = entry->old_recv_push;
1292 vcc_release_async(entry->recv_vcc, -EPIPE);
1293 entry->recv_vcc = NULL;
1298 * Insert entry to lec_arp_table
1299 * LANE2: Add to the end of the list to satisfy 8.1.13
1302 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1304 struct hlist_head *tmp;
1306 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1307 hlist_add_head(&entry->next, tmp);
1309 pr_debug("Added entry:%pM\n", entry->mac_addr);
1313 * Remove entry from lec_arp_table
1316 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1318 struct lec_arp_table *entry;
1319 int i, remove_vcc = 1;
1324 hlist_del(&to_remove->next);
1325 del_timer(&to_remove->timer);
1328 * If this is the only MAC connected to this VCC,
1329 * also tear down the VCC
1331 if (to_remove->status >= ESI_FLUSH_PENDING) {
1333 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1335 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1336 hlist_for_each_entry(entry,
1337 &priv->lec_arp_tables[i], next) {
1338 if (memcmp(to_remove->atm_addr,
1339 entry->atm_addr, ATM_ESA_LEN) == 0) {
1346 lec_arp_clear_vccs(to_remove);
1348 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1350 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1355 static const char *get_status_string(unsigned char st)
1359 return "ESI_UNKNOWN";
1360 case ESI_ARP_PENDING:
1361 return "ESI_ARP_PENDING";
1362 case ESI_VC_PENDING:
1363 return "ESI_VC_PENDING";
1364 case ESI_FLUSH_PENDING:
1365 return "ESI_FLUSH_PENDING";
1366 case ESI_FORWARD_DIRECT:
1367 return "ESI_FORWARD_DIRECT";
1372 static void dump_arp_table(struct lec_priv *priv)
1374 struct lec_arp_table *rulla;
1378 pr_info("Dump %p:\n", priv);
1379 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1380 hlist_for_each_entry(rulla,
1381 &priv->lec_arp_tables[i], next) {
1383 offset += sprintf(buf, "%d: %p\n", i, rulla);
1384 offset += sprintf(buf + offset, "Mac: %pM",
1386 offset += sprintf(buf + offset, " Atm:");
1387 for (j = 0; j < ATM_ESA_LEN; j++) {
1388 offset += sprintf(buf + offset,
1390 rulla->atm_addr[j] & 0xff);
1392 offset += sprintf(buf + offset,
1393 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1394 rulla->vcc ? rulla->vcc->vpi : 0,
1395 rulla->vcc ? rulla->vcc->vci : 0,
1396 rulla->recv_vcc ? rulla->recv_vcc->
1398 rulla->recv_vcc ? rulla->recv_vcc->
1399 vci : 0, rulla->last_used,
1400 rulla->timestamp, rulla->no_tries);
1402 sprintf(buf + offset,
1403 "Flags:%x, Packets_flooded:%x, Status: %s ",
1404 rulla->flags, rulla->packets_flooded,
1405 get_status_string(rulla->status));
1406 pr_info("%s\n", buf);
1410 if (!hlist_empty(&priv->lec_no_forward))
1411 pr_info("No forward\n");
1412 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1414 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1415 offset += sprintf(buf + offset, " Atm:");
1416 for (j = 0; j < ATM_ESA_LEN; j++) {
1417 offset += sprintf(buf + offset, "%2.2x ",
1418 rulla->atm_addr[j] & 0xff);
1420 offset += sprintf(buf + offset,
1421 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1422 rulla->vcc ? rulla->vcc->vpi : 0,
1423 rulla->vcc ? rulla->vcc->vci : 0,
1424 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1425 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1427 rulla->timestamp, rulla->no_tries);
1428 offset += sprintf(buf + offset,
1429 "Flags:%x, Packets_flooded:%x, Status: %s ",
1430 rulla->flags, rulla->packets_flooded,
1431 get_status_string(rulla->status));
1432 pr_info("%s\n", buf);
1435 if (!hlist_empty(&priv->lec_arp_empty_ones))
1436 pr_info("Empty ones\n");
1437 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1439 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1440 offset += sprintf(buf + offset, " Atm:");
1441 for (j = 0; j < ATM_ESA_LEN; j++) {
1442 offset += sprintf(buf + offset, "%2.2x ",
1443 rulla->atm_addr[j] & 0xff);
1445 offset += sprintf(buf + offset,
1446 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1447 rulla->vcc ? rulla->vcc->vpi : 0,
1448 rulla->vcc ? rulla->vcc->vci : 0,
1449 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1450 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1452 rulla->timestamp, rulla->no_tries);
1453 offset += sprintf(buf + offset,
1454 "Flags:%x, Packets_flooded:%x, Status: %s ",
1455 rulla->flags, rulla->packets_flooded,
1456 get_status_string(rulla->status));
1460 if (!hlist_empty(&priv->mcast_fwds))
1461 pr_info("Multicast Forward VCCs\n");
1462 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1464 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1465 offset += sprintf(buf + offset, " Atm:");
1466 for (j = 0; j < ATM_ESA_LEN; j++) {
1467 offset += sprintf(buf + offset, "%2.2x ",
1468 rulla->atm_addr[j] & 0xff);
1470 offset += sprintf(buf + offset,
1471 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1472 rulla->vcc ? rulla->vcc->vpi : 0,
1473 rulla->vcc ? rulla->vcc->vci : 0,
1474 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1475 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1477 rulla->timestamp, rulla->no_tries);
1478 offset += sprintf(buf + offset,
1479 "Flags:%x, Packets_flooded:%x, Status: %s ",
1480 rulla->flags, rulla->packets_flooded,
1481 get_status_string(rulla->status));
1482 pr_info("%s\n", buf);
1487 #define dump_arp_table(priv) do { } while (0)
1491 * Destruction of arp-cache
1493 static void lec_arp_destroy(struct lec_priv *priv)
1495 unsigned long flags;
1496 struct hlist_node *next;
1497 struct lec_arp_table *entry;
1500 cancel_delayed_work_sync(&priv->lec_arp_work);
1503 * Remove all entries
1506 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1507 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1508 hlist_for_each_entry_safe(entry, next,
1509 &priv->lec_arp_tables[i], next) {
1510 lec_arp_remove(priv, entry);
1513 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1516 hlist_for_each_entry_safe(entry, next,
1517 &priv->lec_arp_empty_ones, next) {
1518 del_timer_sync(&entry->timer);
1519 lec_arp_clear_vccs(entry);
1520 hlist_del(&entry->next);
1523 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1525 hlist_for_each_entry_safe(entry, next,
1526 &priv->lec_no_forward, next) {
1527 del_timer_sync(&entry->timer);
1528 lec_arp_clear_vccs(entry);
1529 hlist_del(&entry->next);
1532 INIT_HLIST_HEAD(&priv->lec_no_forward);
1534 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1535 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1536 lec_arp_clear_vccs(entry);
1537 hlist_del(&entry->next);
1540 INIT_HLIST_HEAD(&priv->mcast_fwds);
1541 priv->mcast_vcc = NULL;
1542 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1546 * Find entry by mac_address
1548 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1549 const unsigned char *mac_addr)
1551 struct hlist_head *head;
1552 struct lec_arp_table *entry;
1554 pr_debug("%pM\n", mac_addr);
1556 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1557 hlist_for_each_entry(entry, head, next) {
1558 if (ether_addr_equal(mac_addr, entry->mac_addr))
1564 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1565 const unsigned char *mac_addr)
1567 struct lec_arp_table *to_return;
1569 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1571 pr_info("LEC: Arp entry kmalloc failed\n");
1574 ether_addr_copy(to_return->mac_addr, mac_addr);
1575 INIT_HLIST_NODE(&to_return->next);
1576 setup_timer(&to_return->timer, lec_arp_expire_arp,
1577 (unsigned long)to_return);
1578 to_return->last_used = jiffies;
1579 to_return->priv = priv;
1580 skb_queue_head_init(&to_return->tx_wait);
1581 refcount_set(&to_return->usage, 1);
1585 /* Arp sent timer expired */
1586 static void lec_arp_expire_arp(unsigned long data)
1588 struct lec_arp_table *entry;
1590 entry = (struct lec_arp_table *)data;
1593 if (entry->status == ESI_ARP_PENDING) {
1594 if (entry->no_tries <= entry->priv->max_retry_count) {
1595 if (entry->is_rdesc)
1596 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1597 entry->mac_addr, NULL, NULL);
1599 send_to_lecd(entry->priv, l_arp_xmt,
1600 entry->mac_addr, NULL, NULL);
1603 mod_timer(&entry->timer, jiffies + (1 * HZ));
1607 /* Unknown/unused vcc expire, remove associated entry */
1608 static void lec_arp_expire_vcc(unsigned long data)
1610 unsigned long flags;
1611 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1612 struct lec_priv *priv = to_remove->priv;
1614 del_timer(&to_remove->timer);
1616 pr_debug("%p %p: vpi:%d vci:%d\n",
1618 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1619 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1621 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1622 hlist_del(&to_remove->next);
1623 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1625 lec_arp_clear_vccs(to_remove);
1626 lec_arp_put(to_remove);
1629 static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1631 struct lec_priv *priv)
1633 unsigned long time_to_check;
1635 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1636 time_to_check = priv->forward_delay_time;
1638 time_to_check = priv->aging_time;
1640 pr_debug("About to expire: %lx - %lx > %lx\n",
1641 now, entry->last_used, time_to_check);
1642 if (time_after(now, entry->last_used + time_to_check) &&
1643 !(entry->flags & LEC_PERMANENT_FLAG) &&
1644 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1646 pr_debug("Entry timed out\n");
1647 lec_arp_remove(priv, entry);
1650 /* Something else */
1651 if ((entry->status == ESI_VC_PENDING ||
1652 entry->status == ESI_ARP_PENDING) &&
1653 time_after_eq(now, entry->timestamp +
1654 priv->max_unknown_frame_time)) {
1655 entry->timestamp = jiffies;
1656 entry->packets_flooded = 0;
1657 if (entry->status == ESI_VC_PENDING)
1658 send_to_lecd(priv, l_svc_setup,
1663 if (entry->status == ESI_FLUSH_PENDING &&
1664 time_after_eq(now, entry->timestamp +
1665 priv->path_switching_delay)) {
1666 lec_arp_hold(entry);
1676 * 2. For each entry, delete entries that have aged past the age limit.
1677 * 3. For each entry, depending on the status of the entry, perform
1678 * the following maintenance.
1679 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1680 * tick_count is above the max_unknown_frame_time, clear
1681 * the tick_count to zero and clear the packets_flooded counter
1682 * to zero. This supports the packet rate limit per address
1683 * while flooding unknowns.
1684 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1685 * than or equal to the path_switching_delay, change the status
1686 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1687 * regardless of the progress of the flush protocol.
1689 static void lec_arp_check_expire(struct work_struct *work)
1691 unsigned long flags;
1692 struct lec_priv *priv =
1693 container_of(work, struct lec_priv, lec_arp_work.work);
1694 struct hlist_node *next;
1695 struct lec_arp_table *entry;
1699 pr_debug("%p\n", priv);
1702 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1703 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1704 hlist_for_each_entry_safe(entry, next,
1705 &priv->lec_arp_tables[i], next) {
1706 if (__lec_arp_check_expire(entry, now, priv)) {
1707 struct sk_buff *skb;
1708 struct atm_vcc *vcc = entry->vcc;
1710 spin_unlock_irqrestore(&priv->lec_arp_lock,
1712 while ((skb = skb_dequeue(&entry->tx_wait)))
1714 entry->last_used = jiffies;
1715 entry->status = ESI_FORWARD_DIRECT;
1722 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1724 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1728 * Try to find vcc where mac_address is attached.
1731 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1732 const unsigned char *mac_to_find,
1734 struct lec_arp_table **ret_entry)
1736 unsigned long flags;
1737 struct lec_arp_table *entry;
1738 struct atm_vcc *found;
1740 if (mac_to_find[0] & 0x01) {
1741 switch (priv->lane_version) {
1743 return priv->mcast_vcc;
1744 case 2: /* LANE2 wants arp for multicast addresses */
1745 if (ether_addr_equal(mac_to_find, bus_mac))
1746 return priv->mcast_vcc;
1753 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1754 entry = lec_arp_find(priv, mac_to_find);
1757 if (entry->status == ESI_FORWARD_DIRECT) {
1759 entry->last_used = jiffies;
1760 lec_arp_hold(entry);
1766 * If the LE_ARP cache entry is still pending, reset count to 0
1767 * so another LE_ARP request can be made for this frame.
1769 if (entry->status == ESI_ARP_PENDING)
1770 entry->no_tries = 0;
1772 * Data direct VC not yet set up, check to see if the unknown
1773 * frame count is greater than the limit. If the limit has
1774 * not been reached, allow the caller to send packet to
1777 if (entry->status != ESI_FLUSH_PENDING &&
1778 entry->packets_flooded <
1779 priv->maximum_unknown_frame_count) {
1780 entry->packets_flooded++;
1781 pr_debug("Flooding..\n");
1782 found = priv->mcast_vcc;
1786 * We got here because entry->status == ESI_FLUSH_PENDING
1787 * or BUS flood limit was reached for an entry which is
1788 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1790 lec_arp_hold(entry);
1792 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1796 /* No matching entry was found */
1797 entry = make_entry(priv, mac_to_find);
1798 pr_debug("Making entry\n");
1800 found = priv->mcast_vcc;
1803 lec_arp_add(priv, entry);
1804 /* We want arp-request(s) to be sent */
1805 entry->packets_flooded = 1;
1806 entry->status = ESI_ARP_PENDING;
1807 entry->no_tries = 1;
1808 entry->last_used = entry->timestamp = jiffies;
1809 entry->is_rdesc = is_rdesc;
1810 if (entry->is_rdesc)
1811 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1814 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1815 entry->timer.expires = jiffies + (1 * HZ);
1816 entry->timer.function = lec_arp_expire_arp;
1817 add_timer(&entry->timer);
1818 found = priv->mcast_vcc;
1822 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1827 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1828 unsigned long permanent)
1830 unsigned long flags;
1831 struct hlist_node *next;
1832 struct lec_arp_table *entry;
1836 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1837 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1838 hlist_for_each_entry_safe(entry, next,
1839 &priv->lec_arp_tables[i], next) {
1840 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1842 !(entry->flags & LEC_PERMANENT_FLAG))) {
1843 lec_arp_remove(priv, entry);
1846 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1850 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1855 * Notifies: Response to arp_request (atm_addr != NULL)
1858 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1859 const unsigned char *atm_addr, unsigned long remoteflag,
1860 unsigned int targetless_le_arp)
1862 unsigned long flags;
1863 struct hlist_node *next;
1864 struct lec_arp_table *entry, *tmp;
1867 pr_debug("%smac:%pM\n",
1868 (targetless_le_arp) ? "targetless " : "", mac_addr);
1870 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1871 entry = lec_arp_find(priv, mac_addr);
1872 if (entry == NULL && targetless_le_arp)
1874 * LANE2: ignore targetless LE_ARPs for which
1875 * we have no entry in the cache. 7.1.30
1877 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1878 hlist_for_each_entry_safe(entry, next,
1879 &priv->lec_arp_empty_ones, next) {
1880 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1881 hlist_del(&entry->next);
1882 del_timer(&entry->timer);
1883 tmp = lec_arp_find(priv, mac_addr);
1885 del_timer(&tmp->timer);
1886 tmp->status = ESI_FORWARD_DIRECT;
1887 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1888 tmp->vcc = entry->vcc;
1889 tmp->old_push = entry->old_push;
1890 tmp->last_used = jiffies;
1891 del_timer(&entry->timer);
1895 entry->status = ESI_FORWARD_DIRECT;
1896 ether_addr_copy(entry->mac_addr,
1898 entry->last_used = jiffies;
1899 lec_arp_add(priv, entry);
1902 entry->flags |= LEC_REMOTE_FLAG;
1904 entry->flags &= ~LEC_REMOTE_FLAG;
1905 pr_debug("After update\n");
1906 dump_arp_table(priv);
1912 entry = lec_arp_find(priv, mac_addr);
1914 entry = make_entry(priv, mac_addr);
1917 entry->status = ESI_UNKNOWN;
1918 lec_arp_add(priv, entry);
1919 /* Temporary, changes before end of function */
1921 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1922 del_timer(&entry->timer);
1923 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1924 hlist_for_each_entry(tmp,
1925 &priv->lec_arp_tables[i], next) {
1927 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1928 /* Vcc to this host exists */
1929 if (tmp->status > ESI_VC_PENDING) {
1931 * ESI_FLUSH_PENDING,
1932 * ESI_FORWARD_DIRECT
1934 entry->vcc = tmp->vcc;
1935 entry->old_push = tmp->old_push;
1937 entry->status = tmp->status;
1943 entry->flags |= LEC_REMOTE_FLAG;
1945 entry->flags &= ~LEC_REMOTE_FLAG;
1946 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1947 entry->status = ESI_VC_PENDING;
1948 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1950 pr_debug("After update2\n");
1951 dump_arp_table(priv);
1953 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1957 * Notifies: Vcc setup ready
1960 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1961 struct atm_vcc *vcc,
1962 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1964 unsigned long flags;
1965 struct lec_arp_table *entry;
1966 int i, found_entry = 0;
1968 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1969 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1970 if (ioc_data->receive == 2) {
1971 pr_debug("LEC_ARP: Attaching mcast forward\n");
1973 entry = lec_arp_find(priv, bus_mac);
1975 pr_info("LEC_ARP: Multicast entry not found!\n");
1978 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1979 entry->recv_vcc = vcc;
1980 entry->old_recv_push = old_push;
1982 entry = make_entry(priv, bus_mac);
1985 del_timer(&entry->timer);
1986 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1987 entry->recv_vcc = vcc;
1988 entry->old_recv_push = old_push;
1989 hlist_add_head(&entry->next, &priv->mcast_fwds);
1991 } else if (ioc_data->receive == 1) {
1993 * Vcc which we don't want to make default vcc,
1996 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",
1997 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1998 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1999 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2000 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2001 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2002 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2003 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2004 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2005 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2006 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2007 entry = make_entry(priv, bus_mac);
2010 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2011 eth_zero_addr(entry->mac_addr);
2012 entry->recv_vcc = vcc;
2013 entry->old_recv_push = old_push;
2014 entry->status = ESI_UNKNOWN;
2015 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2016 entry->timer.function = lec_arp_expire_vcc;
2017 hlist_add_head(&entry->next, &priv->lec_no_forward);
2018 add_timer(&entry->timer);
2019 dump_arp_table(priv);
2022 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",
2023 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2024 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2025 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2026 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2027 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2028 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2029 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2030 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2031 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2032 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2033 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2034 hlist_for_each_entry(entry,
2035 &priv->lec_arp_tables[i], next) {
2037 (ioc_data->atm_addr, entry->atm_addr,
2038 ATM_ESA_LEN) == 0) {
2039 pr_debug("LEC_ARP: Attaching data direct\n");
2040 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2041 entry->vcc ? entry->vcc->vci : 0,
2042 entry->recv_vcc ? entry->recv_vcc->
2045 del_timer(&entry->timer);
2047 entry->old_push = old_push;
2048 if (entry->status == ESI_VC_PENDING) {
2049 if (priv->maximum_unknown_frame_count
2054 entry->timestamp = jiffies;
2058 send_to_lecd(priv, l_flush_xmt,
2066 * They were forming a connection
2067 * to us, and we to them. Our
2068 * ATM address is numerically lower
2069 * than theirs, so we make connection
2070 * we formed into default VCC (8.1.11).
2071 * Connection they made gets torn
2072 * down. This might confuse some
2073 * clients. Can be changed if
2074 * someone reports trouble...
2082 pr_debug("After vcc was added\n");
2083 dump_arp_table(priv);
2087 * Not found, snatch address from first data packet that arrives
2090 entry = make_entry(priv, bus_mac);
2094 entry->old_push = old_push;
2095 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2096 eth_zero_addr(entry->mac_addr);
2097 entry->status = ESI_UNKNOWN;
2098 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2099 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2100 entry->timer.function = lec_arp_expire_vcc;
2101 add_timer(&entry->timer);
2102 pr_debug("After vcc was added\n");
2103 dump_arp_table(priv);
2105 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2108 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2110 unsigned long flags;
2111 struct lec_arp_table *entry;
2114 pr_debug("%lx\n", tran_id);
2116 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2117 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2118 hlist_for_each_entry(entry,
2119 &priv->lec_arp_tables[i], next) {
2120 if (entry->flush_tran_id == tran_id &&
2121 entry->status == ESI_FLUSH_PENDING) {
2122 struct sk_buff *skb;
2123 struct atm_vcc *vcc = entry->vcc;
2125 lec_arp_hold(entry);
2126 spin_unlock_irqrestore(&priv->lec_arp_lock,
2128 while ((skb = skb_dequeue(&entry->tx_wait)))
2130 entry->last_used = jiffies;
2131 entry->status = ESI_FORWARD_DIRECT;
2133 pr_debug("LEC_ARP: Flushed\n");
2138 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2139 dump_arp_table(priv);
2143 lec_set_flush_tran_id(struct lec_priv *priv,
2144 const unsigned char *atm_addr, unsigned long tran_id)
2146 unsigned long flags;
2147 struct lec_arp_table *entry;
2150 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2151 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2152 hlist_for_each_entry(entry,
2153 &priv->lec_arp_tables[i], next) {
2154 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2155 entry->flush_tran_id = tran_id;
2156 pr_debug("Set flush transaction id to %lx for %p\n",
2160 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2163 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2165 unsigned long flags;
2166 unsigned char mac_addr[] = {
2167 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2169 struct lec_arp_table *to_add;
2170 struct lec_vcc_priv *vpriv;
2173 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2177 vpriv->old_pop = vcc->pop;
2178 vcc->user_back = vpriv;
2180 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2181 to_add = make_entry(priv, mac_addr);
2183 vcc->pop = vpriv->old_pop;
2188 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2189 to_add->status = ESI_FORWARD_DIRECT;
2190 to_add->flags |= LEC_PERMANENT_FLAG;
2192 to_add->old_push = vcc->push;
2193 vcc->push = lec_push;
2194 priv->mcast_vcc = vcc;
2195 lec_arp_add(priv, to_add);
2197 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2201 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2203 unsigned long flags;
2204 struct hlist_node *next;
2205 struct lec_arp_table *entry;
2208 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2209 dump_arp_table(priv);
2211 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2213 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2214 hlist_for_each_entry_safe(entry, next,
2215 &priv->lec_arp_tables[i], next) {
2216 if (vcc == entry->vcc) {
2217 lec_arp_remove(priv, entry);
2219 if (priv->mcast_vcc == vcc)
2220 priv->mcast_vcc = NULL;
2225 hlist_for_each_entry_safe(entry, next,
2226 &priv->lec_arp_empty_ones, next) {
2227 if (entry->vcc == vcc) {
2228 lec_arp_clear_vccs(entry);
2229 del_timer(&entry->timer);
2230 hlist_del(&entry->next);
2235 hlist_for_each_entry_safe(entry, next,
2236 &priv->lec_no_forward, next) {
2237 if (entry->recv_vcc == vcc) {
2238 lec_arp_clear_vccs(entry);
2239 del_timer(&entry->timer);
2240 hlist_del(&entry->next);
2245 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2246 if (entry->recv_vcc == vcc) {
2247 lec_arp_clear_vccs(entry);
2248 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2249 hlist_del(&entry->next);
2254 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2255 dump_arp_table(priv);
2259 lec_arp_check_empties(struct lec_priv *priv,
2260 struct atm_vcc *vcc, struct sk_buff *skb)
2262 unsigned long flags;
2263 struct hlist_node *next;
2264 struct lec_arp_table *entry, *tmp;
2265 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2266 unsigned char *src = hdr->h_source;
2268 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2269 hlist_for_each_entry_safe(entry, next,
2270 &priv->lec_arp_empty_ones, next) {
2271 if (vcc == entry->vcc) {
2272 del_timer(&entry->timer);
2273 ether_addr_copy(entry->mac_addr, src);
2274 entry->status = ESI_FORWARD_DIRECT;
2275 entry->last_used = jiffies;
2276 /* We might have got an entry */
2277 tmp = lec_arp_find(priv, src);
2279 lec_arp_remove(priv, tmp);
2282 hlist_del(&entry->next);
2283 lec_arp_add(priv, entry);
2287 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2289 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2292 MODULE_LICENSE("GPL");