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 || !dev_lec[arg])
715 vcc->proto_data = dev_lec[arg];
716 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
719 /* Initialize device. */
720 static int lecd_attach(struct atm_vcc *vcc, int arg)
723 struct lec_priv *priv;
729 if (arg >= MAX_LEC_ITF)
734 size = sizeof(struct lec_priv);
735 dev_lec[i] = alloc_etherdev(size);
738 dev_lec[i]->netdev_ops = &lec_netdev_ops;
739 dev_lec[i]->max_mtu = 18190;
740 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
741 if (register_netdev(dev_lec[i])) {
742 free_netdev(dev_lec[i]);
746 priv = netdev_priv(dev_lec[i]);
748 priv = netdev_priv(dev_lec[i]);
753 priv->itfnum = i; /* LANE2 addition */
755 vcc->dev = &lecatm_dev;
756 vcc_insert_socket(sk_atm(vcc));
758 vcc->proto_data = dev_lec[i];
759 set_bit(ATM_VF_META, &vcc->flags);
760 set_bit(ATM_VF_READY, &vcc->flags);
762 /* Set default values to these variables */
763 priv->maximum_unknown_frame_count = 1;
764 priv->max_unknown_frame_time = (1 * HZ);
765 priv->vcc_timeout_period = (1200 * HZ);
766 priv->max_retry_count = 1;
767 priv->aging_time = (300 * HZ);
768 priv->forward_delay_time = (15 * HZ);
769 priv->topology_change = 0;
770 priv->arp_response_time = (1 * HZ);
771 priv->flush_timeout = (4 * HZ);
772 priv->path_switching_delay = (6 * HZ);
774 if (dev_lec[i]->flags & IFF_UP)
775 netif_start_queue(dev_lec[i]);
776 __module_get(THIS_MODULE);
780 #ifdef CONFIG_PROC_FS
781 static const char *lec_arp_get_status_string(unsigned char status)
783 static const char *const lec_arp_status_string[] = {
788 "ESI_FLUSH_PENDING ",
792 if (status > ESI_FORWARD_DIRECT)
793 status = 3; /* ESI_UNDEFINED */
794 return lec_arp_status_string[status];
797 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
801 for (i = 0; i < ETH_ALEN; i++)
802 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
803 seq_printf(seq, " ");
804 for (i = 0; i < ATM_ESA_LEN; i++)
805 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
806 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
807 entry->flags & 0xffff);
809 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
811 seq_printf(seq, " ");
812 if (entry->recv_vcc) {
813 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
814 entry->recv_vcc->vci);
821 struct lec_priv *locked;
822 struct hlist_node *node;
823 struct net_device *dev;
829 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
832 struct hlist_node *e = state->node;
836 if (e == SEQ_START_TOKEN) {
841 for (; e; e = e->next) {
847 return (*l < 0) ? state : NULL;
850 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
851 struct lec_priv *priv)
856 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
857 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
861 state->arp_table = p;
865 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
866 struct lec_priv *priv)
868 struct hlist_head *lec_misc_tables[] = {
869 &priv->lec_arp_empty_ones,
870 &priv->lec_no_forward,
876 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
877 v = lec_tbl_walk(state, lec_misc_tables[q], l);
881 state->misc_table = q;
885 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
886 struct lec_priv *priv)
888 if (!state->locked) {
889 state->locked = priv;
890 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
892 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
893 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
894 state->locked = NULL;
895 /* Partial state reset for the next time we get called */
896 state->arp_table = state->misc_table = 0;
898 return state->locked;
901 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
903 struct net_device *dev;
906 dev = state->dev ? state->dev : dev_lec[state->itf];
907 v = (dev && netdev_priv(dev)) ?
908 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
911 /* Partial state reset for the next time we get called */
918 static void *lec_get_idx(struct lec_state *state, loff_t l)
922 for (; state->itf < MAX_LEC_ITF; state->itf++) {
923 v = lec_itf_walk(state, &l);
930 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
932 struct lec_state *state = seq->private;
936 state->locked = NULL;
937 state->arp_table = 0;
938 state->misc_table = 0;
939 state->node = SEQ_START_TOKEN;
941 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
944 static void lec_seq_stop(struct seq_file *seq, void *v)
946 struct lec_state *state = seq->private;
949 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
955 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
957 struct lec_state *state = seq->private;
959 v = lec_get_idx(state, 1);
960 *pos += !!PTR_ERR(v);
964 static int lec_seq_show(struct seq_file *seq, void *v)
966 static const char lec_banner[] =
967 "Itf MAC ATM destination"
969 "VPI/VCI Recv VPI/VCI\n";
971 if (v == SEQ_START_TOKEN)
972 seq_puts(seq, lec_banner);
974 struct lec_state *state = seq->private;
975 struct net_device *dev = state->dev;
976 struct lec_arp_table *entry = hlist_entry(state->node,
977 struct lec_arp_table,
980 seq_printf(seq, "%s ", dev->name);
981 lec_info(seq, entry);
986 static const struct seq_operations lec_seq_ops = {
987 .start = lec_seq_start,
988 .next = lec_seq_next,
989 .stop = lec_seq_stop,
990 .show = lec_seq_show,
994 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
996 struct atm_vcc *vcc = ATM_SD(sock);
1003 if (!capable(CAP_NET_ADMIN))
1007 return -ENOIOCTLCMD;
1012 err = lecd_attach(vcc, (int)arg);
1014 sock->state = SS_CONNECTED;
1017 err = lec_mcast_attach(vcc, (int)arg);
1020 err = lec_vcc_attach(vcc, (void __user *)arg);
1027 static struct atm_ioctl lane_ioctl_ops = {
1028 .owner = THIS_MODULE,
1029 .ioctl = lane_ioctl,
1032 static int __init lane_module_init(void)
1034 #ifdef CONFIG_PROC_FS
1035 struct proc_dir_entry *p;
1037 p = proc_create_seq_private("lec", 0444, atm_proc_root, &lec_seq_ops,
1038 sizeof(struct lec_state), NULL);
1040 pr_err("Unable to initialize /proc/net/atm/lec\n");
1045 register_atm_ioctl(&lane_ioctl_ops);
1046 pr_info("lec.c: initialized\n");
1050 static void __exit lane_module_cleanup(void)
1054 #ifdef CONFIG_PROC_FS
1055 remove_proc_entry("lec", atm_proc_root);
1058 deregister_atm_ioctl(&lane_ioctl_ops);
1060 for (i = 0; i < MAX_LEC_ITF; i++) {
1061 if (dev_lec[i] != NULL) {
1062 unregister_netdev(dev_lec[i]);
1063 free_netdev(dev_lec[i]);
1069 module_init(lane_module_init);
1070 module_exit(lane_module_cleanup);
1073 * LANE2: 3.1.3, LE_RESOLVE.request
1074 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1075 * If sizeoftlvs == NULL the default TLVs associated with with this
1077 * If dst_mac == NULL, targetless LE_ARP will be sent
1079 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1080 u8 **tlvs, u32 *sizeoftlvs)
1082 unsigned long flags;
1083 struct lec_priv *priv = netdev_priv(dev);
1084 struct lec_arp_table *table;
1085 struct sk_buff *skb;
1089 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1090 table = lec_arp_find(priv, dst_mac);
1091 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1095 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1099 *sizeoftlvs = table->sizeoftlvs;
1104 if (sizeoftlvs == NULL)
1105 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1108 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1111 skb->len = *sizeoftlvs;
1112 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1113 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1119 * LANE2: 3.1.4, LE_ASSOCIATE.request
1120 * Associate the *tlvs with the *lan_dst address.
1121 * Will overwrite any previous association
1122 * Returns 1 for success, 0 for failure (out of memory)
1125 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1126 const u8 *tlvs, u32 sizeoftlvs)
1129 struct sk_buff *skb;
1130 struct lec_priv *priv = netdev_priv(dev);
1132 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1133 return 0; /* not our mac address */
1135 kfree(priv->tlvs); /* NULL if there was no previous association */
1137 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1138 if (priv->tlvs == NULL)
1140 priv->sizeoftlvs = sizeoftlvs;
1142 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1145 skb->len = sizeoftlvs;
1146 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1147 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1149 pr_info("lec.c: lane2_associate_req() failed\n");
1151 * If the previous association has changed we must
1152 * somehow notify other LANE entities about the change
1158 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1161 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1162 const u8 *tlvs, u32 sizeoftlvs)
1167 struct lec_priv *priv = netdev_priv(dev);
1169 * Why have the TLVs in LE_ARP entries
1170 * since we do not use them? When you
1171 * uncomment this code, make sure the
1172 * TLVs get freed when entry is killed
1174 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1177 return; /* should not happen */
1181 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1182 if (entry->tlvs == NULL)
1184 entry->sizeoftlvs = sizeoftlvs;
1188 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1189 while (i < sizeoftlvs)
1190 pr_cont("%02x ", tlvs[i++]);
1195 /* tell MPOA about the TLVs we saw */
1196 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1197 priv->lane2_ops->associate_indicator(dev, mac_addr,
1203 * Here starts what used to lec_arpc.c
1205 * lec_arpc.c was added here when making
1206 * lane client modular. October 1997
1209 #include <linux/types.h>
1210 #include <linux/timer.h>
1211 #include <linux/param.h>
1212 #include <linux/atomic.h>
1213 #include <linux/inetdevice.h>
1214 #include <net/route.h>
1217 #define pr_debug(format, args...)
1219 #define pr_debug printk
1222 #define DEBUG_ARP_TABLE 0
1224 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1226 static void lec_arp_check_expire(struct work_struct *work);
1227 static void lec_arp_expire_arp(struct timer_list *t);
1233 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1236 * Initialization of arp-cache
1238 static void lec_arp_init(struct lec_priv *priv)
1242 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1243 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1244 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1245 INIT_HLIST_HEAD(&priv->lec_no_forward);
1246 INIT_HLIST_HEAD(&priv->mcast_fwds);
1247 spin_lock_init(&priv->lec_arp_lock);
1248 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1249 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1252 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1255 struct atm_vcc *vcc = entry->vcc;
1256 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1257 struct net_device *dev = (struct net_device *)vcc->proto_data;
1259 vcc->pop = vpriv->old_pop;
1261 netif_wake_queue(dev);
1263 vcc->user_back = NULL;
1264 vcc->push = entry->old_push;
1265 vcc_release_async(vcc, -EPIPE);
1268 if (entry->recv_vcc) {
1269 entry->recv_vcc->push = entry->old_recv_push;
1270 vcc_release_async(entry->recv_vcc, -EPIPE);
1271 entry->recv_vcc = NULL;
1276 * Insert entry to lec_arp_table
1277 * LANE2: Add to the end of the list to satisfy 8.1.13
1280 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1282 struct hlist_head *tmp;
1284 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1285 hlist_add_head(&entry->next, tmp);
1287 pr_debug("Added entry:%pM\n", entry->mac_addr);
1291 * Remove entry from lec_arp_table
1294 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1296 struct lec_arp_table *entry;
1297 int i, remove_vcc = 1;
1302 hlist_del(&to_remove->next);
1303 del_timer(&to_remove->timer);
1306 * If this is the only MAC connected to this VCC,
1307 * also tear down the VCC
1309 if (to_remove->status >= ESI_FLUSH_PENDING) {
1311 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1313 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1314 hlist_for_each_entry(entry,
1315 &priv->lec_arp_tables[i], next) {
1316 if (memcmp(to_remove->atm_addr,
1317 entry->atm_addr, ATM_ESA_LEN) == 0) {
1324 lec_arp_clear_vccs(to_remove);
1326 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1328 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1333 static const char *get_status_string(unsigned char st)
1337 return "ESI_UNKNOWN";
1338 case ESI_ARP_PENDING:
1339 return "ESI_ARP_PENDING";
1340 case ESI_VC_PENDING:
1341 return "ESI_VC_PENDING";
1342 case ESI_FLUSH_PENDING:
1343 return "ESI_FLUSH_PENDING";
1344 case ESI_FORWARD_DIRECT:
1345 return "ESI_FORWARD_DIRECT";
1350 static void dump_arp_table(struct lec_priv *priv)
1352 struct lec_arp_table *rulla;
1356 pr_info("Dump %p:\n", priv);
1357 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1358 hlist_for_each_entry(rulla,
1359 &priv->lec_arp_tables[i], next) {
1361 offset += sprintf(buf, "%d: %p\n", i, rulla);
1362 offset += sprintf(buf + offset, "Mac: %pM",
1364 offset += sprintf(buf + offset, " Atm:");
1365 for (j = 0; j < ATM_ESA_LEN; j++) {
1366 offset += sprintf(buf + offset,
1368 rulla->atm_addr[j] & 0xff);
1370 offset += sprintf(buf + offset,
1371 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1372 rulla->vcc ? rulla->vcc->vpi : 0,
1373 rulla->vcc ? rulla->vcc->vci : 0,
1374 rulla->recv_vcc ? rulla->recv_vcc->
1376 rulla->recv_vcc ? rulla->recv_vcc->
1377 vci : 0, rulla->last_used,
1378 rulla->timestamp, rulla->no_tries);
1380 sprintf(buf + offset,
1381 "Flags:%x, Packets_flooded:%x, Status: %s ",
1382 rulla->flags, rulla->packets_flooded,
1383 get_status_string(rulla->status));
1384 pr_info("%s\n", buf);
1388 if (!hlist_empty(&priv->lec_no_forward))
1389 pr_info("No forward\n");
1390 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1392 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1393 offset += sprintf(buf + offset, " Atm:");
1394 for (j = 0; j < ATM_ESA_LEN; j++) {
1395 offset += sprintf(buf + offset, "%2.2x ",
1396 rulla->atm_addr[j] & 0xff);
1398 offset += sprintf(buf + offset,
1399 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1400 rulla->vcc ? rulla->vcc->vpi : 0,
1401 rulla->vcc ? rulla->vcc->vci : 0,
1402 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1403 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1405 rulla->timestamp, rulla->no_tries);
1406 offset += sprintf(buf + offset,
1407 "Flags:%x, Packets_flooded:%x, Status: %s ",
1408 rulla->flags, rulla->packets_flooded,
1409 get_status_string(rulla->status));
1410 pr_info("%s\n", buf);
1413 if (!hlist_empty(&priv->lec_arp_empty_ones))
1414 pr_info("Empty ones\n");
1415 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1417 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1418 offset += sprintf(buf + offset, " Atm:");
1419 for (j = 0; j < ATM_ESA_LEN; j++) {
1420 offset += sprintf(buf + offset, "%2.2x ",
1421 rulla->atm_addr[j] & 0xff);
1423 offset += sprintf(buf + offset,
1424 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1425 rulla->vcc ? rulla->vcc->vpi : 0,
1426 rulla->vcc ? rulla->vcc->vci : 0,
1427 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1428 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1430 rulla->timestamp, rulla->no_tries);
1431 offset += sprintf(buf + offset,
1432 "Flags:%x, Packets_flooded:%x, Status: %s ",
1433 rulla->flags, rulla->packets_flooded,
1434 get_status_string(rulla->status));
1438 if (!hlist_empty(&priv->mcast_fwds))
1439 pr_info("Multicast Forward VCCs\n");
1440 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1442 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1443 offset += sprintf(buf + offset, " Atm:");
1444 for (j = 0; j < ATM_ESA_LEN; j++) {
1445 offset += sprintf(buf + offset, "%2.2x ",
1446 rulla->atm_addr[j] & 0xff);
1448 offset += sprintf(buf + offset,
1449 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1450 rulla->vcc ? rulla->vcc->vpi : 0,
1451 rulla->vcc ? rulla->vcc->vci : 0,
1452 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1453 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1455 rulla->timestamp, rulla->no_tries);
1456 offset += sprintf(buf + offset,
1457 "Flags:%x, Packets_flooded:%x, Status: %s ",
1458 rulla->flags, rulla->packets_flooded,
1459 get_status_string(rulla->status));
1460 pr_info("%s\n", buf);
1465 #define dump_arp_table(priv) do { } while (0)
1469 * Destruction of arp-cache
1471 static void lec_arp_destroy(struct lec_priv *priv)
1473 unsigned long flags;
1474 struct hlist_node *next;
1475 struct lec_arp_table *entry;
1478 cancel_delayed_work_sync(&priv->lec_arp_work);
1481 * Remove all entries
1484 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1485 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1486 hlist_for_each_entry_safe(entry, next,
1487 &priv->lec_arp_tables[i], next) {
1488 lec_arp_remove(priv, entry);
1491 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1494 hlist_for_each_entry_safe(entry, next,
1495 &priv->lec_arp_empty_ones, next) {
1496 del_timer_sync(&entry->timer);
1497 lec_arp_clear_vccs(entry);
1498 hlist_del(&entry->next);
1501 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1503 hlist_for_each_entry_safe(entry, next,
1504 &priv->lec_no_forward, next) {
1505 del_timer_sync(&entry->timer);
1506 lec_arp_clear_vccs(entry);
1507 hlist_del(&entry->next);
1510 INIT_HLIST_HEAD(&priv->lec_no_forward);
1512 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1513 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1514 lec_arp_clear_vccs(entry);
1515 hlist_del(&entry->next);
1518 INIT_HLIST_HEAD(&priv->mcast_fwds);
1519 priv->mcast_vcc = NULL;
1520 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1524 * Find entry by mac_address
1526 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1527 const unsigned char *mac_addr)
1529 struct hlist_head *head;
1530 struct lec_arp_table *entry;
1532 pr_debug("%pM\n", mac_addr);
1534 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1535 hlist_for_each_entry(entry, head, next) {
1536 if (ether_addr_equal(mac_addr, entry->mac_addr))
1542 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1543 const unsigned char *mac_addr)
1545 struct lec_arp_table *to_return;
1547 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1549 pr_info("LEC: Arp entry kmalloc failed\n");
1552 ether_addr_copy(to_return->mac_addr, mac_addr);
1553 INIT_HLIST_NODE(&to_return->next);
1554 timer_setup(&to_return->timer, lec_arp_expire_arp, 0);
1555 to_return->last_used = jiffies;
1556 to_return->priv = priv;
1557 skb_queue_head_init(&to_return->tx_wait);
1558 refcount_set(&to_return->usage, 1);
1562 /* Arp sent timer expired */
1563 static void lec_arp_expire_arp(struct timer_list *t)
1565 struct lec_arp_table *entry;
1567 entry = from_timer(entry, t, timer);
1570 if (entry->status == ESI_ARP_PENDING) {
1571 if (entry->no_tries <= entry->priv->max_retry_count) {
1572 if (entry->is_rdesc)
1573 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1574 entry->mac_addr, NULL, NULL);
1576 send_to_lecd(entry->priv, l_arp_xmt,
1577 entry->mac_addr, NULL, NULL);
1580 mod_timer(&entry->timer, jiffies + (1 * HZ));
1584 /* Unknown/unused vcc expire, remove associated entry */
1585 static void lec_arp_expire_vcc(struct timer_list *t)
1587 unsigned long flags;
1588 struct lec_arp_table *to_remove = from_timer(to_remove, t, timer);
1589 struct lec_priv *priv = to_remove->priv;
1591 del_timer(&to_remove->timer);
1593 pr_debug("%p %p: vpi:%d vci:%d\n",
1595 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1596 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1598 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1599 hlist_del(&to_remove->next);
1600 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1602 lec_arp_clear_vccs(to_remove);
1603 lec_arp_put(to_remove);
1606 static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1608 struct lec_priv *priv)
1610 unsigned long time_to_check;
1612 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1613 time_to_check = priv->forward_delay_time;
1615 time_to_check = priv->aging_time;
1617 pr_debug("About to expire: %lx - %lx > %lx\n",
1618 now, entry->last_used, time_to_check);
1619 if (time_after(now, entry->last_used + time_to_check) &&
1620 !(entry->flags & LEC_PERMANENT_FLAG) &&
1621 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1623 pr_debug("Entry timed out\n");
1624 lec_arp_remove(priv, entry);
1627 /* Something else */
1628 if ((entry->status == ESI_VC_PENDING ||
1629 entry->status == ESI_ARP_PENDING) &&
1630 time_after_eq(now, entry->timestamp +
1631 priv->max_unknown_frame_time)) {
1632 entry->timestamp = jiffies;
1633 entry->packets_flooded = 0;
1634 if (entry->status == ESI_VC_PENDING)
1635 send_to_lecd(priv, l_svc_setup,
1640 if (entry->status == ESI_FLUSH_PENDING &&
1641 time_after_eq(now, entry->timestamp +
1642 priv->path_switching_delay)) {
1643 lec_arp_hold(entry);
1653 * 2. For each entry, delete entries that have aged past the age limit.
1654 * 3. For each entry, depending on the status of the entry, perform
1655 * the following maintenance.
1656 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1657 * tick_count is above the max_unknown_frame_time, clear
1658 * the tick_count to zero and clear the packets_flooded counter
1659 * to zero. This supports the packet rate limit per address
1660 * while flooding unknowns.
1661 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1662 * than or equal to the path_switching_delay, change the status
1663 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1664 * regardless of the progress of the flush protocol.
1666 static void lec_arp_check_expire(struct work_struct *work)
1668 unsigned long flags;
1669 struct lec_priv *priv =
1670 container_of(work, struct lec_priv, lec_arp_work.work);
1671 struct hlist_node *next;
1672 struct lec_arp_table *entry;
1676 pr_debug("%p\n", priv);
1679 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1680 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1681 hlist_for_each_entry_safe(entry, next,
1682 &priv->lec_arp_tables[i], next) {
1683 if (__lec_arp_check_expire(entry, now, priv)) {
1684 struct sk_buff *skb;
1685 struct atm_vcc *vcc = entry->vcc;
1687 spin_unlock_irqrestore(&priv->lec_arp_lock,
1689 while ((skb = skb_dequeue(&entry->tx_wait)))
1691 entry->last_used = jiffies;
1692 entry->status = ESI_FORWARD_DIRECT;
1699 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1701 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1705 * Try to find vcc where mac_address is attached.
1708 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1709 const unsigned char *mac_to_find,
1711 struct lec_arp_table **ret_entry)
1713 unsigned long flags;
1714 struct lec_arp_table *entry;
1715 struct atm_vcc *found;
1717 if (mac_to_find[0] & 0x01) {
1718 switch (priv->lane_version) {
1720 return priv->mcast_vcc;
1721 case 2: /* LANE2 wants arp for multicast addresses */
1722 if (ether_addr_equal(mac_to_find, bus_mac))
1723 return priv->mcast_vcc;
1730 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1731 entry = lec_arp_find(priv, mac_to_find);
1734 if (entry->status == ESI_FORWARD_DIRECT) {
1736 entry->last_used = jiffies;
1737 lec_arp_hold(entry);
1743 * If the LE_ARP cache entry is still pending, reset count to 0
1744 * so another LE_ARP request can be made for this frame.
1746 if (entry->status == ESI_ARP_PENDING)
1747 entry->no_tries = 0;
1749 * Data direct VC not yet set up, check to see if the unknown
1750 * frame count is greater than the limit. If the limit has
1751 * not been reached, allow the caller to send packet to
1754 if (entry->status != ESI_FLUSH_PENDING &&
1755 entry->packets_flooded <
1756 priv->maximum_unknown_frame_count) {
1757 entry->packets_flooded++;
1758 pr_debug("Flooding..\n");
1759 found = priv->mcast_vcc;
1763 * We got here because entry->status == ESI_FLUSH_PENDING
1764 * or BUS flood limit was reached for an entry which is
1765 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1767 lec_arp_hold(entry);
1769 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1773 /* No matching entry was found */
1774 entry = make_entry(priv, mac_to_find);
1775 pr_debug("Making entry\n");
1777 found = priv->mcast_vcc;
1780 lec_arp_add(priv, entry);
1781 /* We want arp-request(s) to be sent */
1782 entry->packets_flooded = 1;
1783 entry->status = ESI_ARP_PENDING;
1784 entry->no_tries = 1;
1785 entry->last_used = entry->timestamp = jiffies;
1786 entry->is_rdesc = is_rdesc;
1787 if (entry->is_rdesc)
1788 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1791 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1792 entry->timer.expires = jiffies + (1 * HZ);
1793 entry->timer.function = lec_arp_expire_arp;
1794 add_timer(&entry->timer);
1795 found = priv->mcast_vcc;
1799 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1804 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1805 unsigned long permanent)
1807 unsigned long flags;
1808 struct hlist_node *next;
1809 struct lec_arp_table *entry;
1813 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1814 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1815 hlist_for_each_entry_safe(entry, next,
1816 &priv->lec_arp_tables[i], next) {
1817 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1819 !(entry->flags & LEC_PERMANENT_FLAG))) {
1820 lec_arp_remove(priv, entry);
1823 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1827 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1832 * Notifies: Response to arp_request (atm_addr != NULL)
1835 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1836 const unsigned char *atm_addr, unsigned long remoteflag,
1837 unsigned int targetless_le_arp)
1839 unsigned long flags;
1840 struct hlist_node *next;
1841 struct lec_arp_table *entry, *tmp;
1844 pr_debug("%smac:%pM\n",
1845 (targetless_le_arp) ? "targetless " : "", mac_addr);
1847 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1848 entry = lec_arp_find(priv, mac_addr);
1849 if (entry == NULL && targetless_le_arp)
1851 * LANE2: ignore targetless LE_ARPs for which
1852 * we have no entry in the cache. 7.1.30
1854 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1855 hlist_for_each_entry_safe(entry, next,
1856 &priv->lec_arp_empty_ones, next) {
1857 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1858 hlist_del(&entry->next);
1859 del_timer(&entry->timer);
1860 tmp = lec_arp_find(priv, mac_addr);
1862 del_timer(&tmp->timer);
1863 tmp->status = ESI_FORWARD_DIRECT;
1864 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1865 tmp->vcc = entry->vcc;
1866 tmp->old_push = entry->old_push;
1867 tmp->last_used = jiffies;
1868 del_timer(&entry->timer);
1872 entry->status = ESI_FORWARD_DIRECT;
1873 ether_addr_copy(entry->mac_addr,
1875 entry->last_used = jiffies;
1876 lec_arp_add(priv, entry);
1879 entry->flags |= LEC_REMOTE_FLAG;
1881 entry->flags &= ~LEC_REMOTE_FLAG;
1882 pr_debug("After update\n");
1883 dump_arp_table(priv);
1889 entry = lec_arp_find(priv, mac_addr);
1891 entry = make_entry(priv, mac_addr);
1894 entry->status = ESI_UNKNOWN;
1895 lec_arp_add(priv, entry);
1896 /* Temporary, changes before end of function */
1898 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1899 del_timer(&entry->timer);
1900 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1901 hlist_for_each_entry(tmp,
1902 &priv->lec_arp_tables[i], next) {
1904 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1905 /* Vcc to this host exists */
1906 if (tmp->status > ESI_VC_PENDING) {
1908 * ESI_FLUSH_PENDING,
1909 * ESI_FORWARD_DIRECT
1911 entry->vcc = tmp->vcc;
1912 entry->old_push = tmp->old_push;
1914 entry->status = tmp->status;
1920 entry->flags |= LEC_REMOTE_FLAG;
1922 entry->flags &= ~LEC_REMOTE_FLAG;
1923 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1924 entry->status = ESI_VC_PENDING;
1925 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1927 pr_debug("After update2\n");
1928 dump_arp_table(priv);
1930 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1934 * Notifies: Vcc setup ready
1937 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1938 struct atm_vcc *vcc,
1939 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1941 unsigned long flags;
1942 struct lec_arp_table *entry;
1943 int i, found_entry = 0;
1945 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1946 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1947 if (ioc_data->receive == 2) {
1948 pr_debug("LEC_ARP: Attaching mcast forward\n");
1950 entry = lec_arp_find(priv, bus_mac);
1952 pr_info("LEC_ARP: Multicast entry not found!\n");
1955 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1956 entry->recv_vcc = vcc;
1957 entry->old_recv_push = old_push;
1959 entry = make_entry(priv, bus_mac);
1962 del_timer(&entry->timer);
1963 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1964 entry->recv_vcc = vcc;
1965 entry->old_recv_push = old_push;
1966 hlist_add_head(&entry->next, &priv->mcast_fwds);
1968 } else if (ioc_data->receive == 1) {
1970 * Vcc which we don't want to make default vcc,
1973 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",
1974 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1975 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1976 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1977 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1978 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1979 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1980 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1981 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1982 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
1983 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
1984 entry = make_entry(priv, bus_mac);
1987 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1988 eth_zero_addr(entry->mac_addr);
1989 entry->recv_vcc = vcc;
1990 entry->old_recv_push = old_push;
1991 entry->status = ESI_UNKNOWN;
1992 entry->timer.expires = jiffies + priv->vcc_timeout_period;
1993 entry->timer.function = lec_arp_expire_vcc;
1994 hlist_add_head(&entry->next, &priv->lec_no_forward);
1995 add_timer(&entry->timer);
1996 dump_arp_table(priv);
1999 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",
2000 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2001 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2002 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2003 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2004 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2005 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2006 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2007 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2008 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2009 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2010 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2011 hlist_for_each_entry(entry,
2012 &priv->lec_arp_tables[i], next) {
2014 (ioc_data->atm_addr, entry->atm_addr,
2015 ATM_ESA_LEN) == 0) {
2016 pr_debug("LEC_ARP: Attaching data direct\n");
2017 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2018 entry->vcc ? entry->vcc->vci : 0,
2019 entry->recv_vcc ? entry->recv_vcc->
2022 del_timer(&entry->timer);
2024 entry->old_push = old_push;
2025 if (entry->status == ESI_VC_PENDING) {
2026 if (priv->maximum_unknown_frame_count
2031 entry->timestamp = jiffies;
2035 send_to_lecd(priv, l_flush_xmt,
2043 * They were forming a connection
2044 * to us, and we to them. Our
2045 * ATM address is numerically lower
2046 * than theirs, so we make connection
2047 * we formed into default VCC (8.1.11).
2048 * Connection they made gets torn
2049 * down. This might confuse some
2050 * clients. Can be changed if
2051 * someone reports trouble...
2059 pr_debug("After vcc was added\n");
2060 dump_arp_table(priv);
2064 * Not found, snatch address from first data packet that arrives
2067 entry = make_entry(priv, bus_mac);
2071 entry->old_push = old_push;
2072 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2073 eth_zero_addr(entry->mac_addr);
2074 entry->status = ESI_UNKNOWN;
2075 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2076 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2077 entry->timer.function = lec_arp_expire_vcc;
2078 add_timer(&entry->timer);
2079 pr_debug("After vcc was added\n");
2080 dump_arp_table(priv);
2082 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2085 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2087 unsigned long flags;
2088 struct lec_arp_table *entry;
2091 pr_debug("%lx\n", tran_id);
2093 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2094 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2095 hlist_for_each_entry(entry,
2096 &priv->lec_arp_tables[i], next) {
2097 if (entry->flush_tran_id == tran_id &&
2098 entry->status == ESI_FLUSH_PENDING) {
2099 struct sk_buff *skb;
2100 struct atm_vcc *vcc = entry->vcc;
2102 lec_arp_hold(entry);
2103 spin_unlock_irqrestore(&priv->lec_arp_lock,
2105 while ((skb = skb_dequeue(&entry->tx_wait)))
2107 entry->last_used = jiffies;
2108 entry->status = ESI_FORWARD_DIRECT;
2110 pr_debug("LEC_ARP: Flushed\n");
2115 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2116 dump_arp_table(priv);
2120 lec_set_flush_tran_id(struct lec_priv *priv,
2121 const unsigned char *atm_addr, unsigned long tran_id)
2123 unsigned long flags;
2124 struct lec_arp_table *entry;
2127 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2128 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2129 hlist_for_each_entry(entry,
2130 &priv->lec_arp_tables[i], next) {
2131 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2132 entry->flush_tran_id = tran_id;
2133 pr_debug("Set flush transaction id to %lx for %p\n",
2137 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2140 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2142 unsigned long flags;
2143 unsigned char mac_addr[] = {
2144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2146 struct lec_arp_table *to_add;
2147 struct lec_vcc_priv *vpriv;
2150 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2154 vpriv->old_pop = vcc->pop;
2155 vcc->user_back = vpriv;
2157 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2158 to_add = make_entry(priv, mac_addr);
2160 vcc->pop = vpriv->old_pop;
2165 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2166 to_add->status = ESI_FORWARD_DIRECT;
2167 to_add->flags |= LEC_PERMANENT_FLAG;
2169 to_add->old_push = vcc->push;
2170 vcc->push = lec_push;
2171 priv->mcast_vcc = vcc;
2172 lec_arp_add(priv, to_add);
2174 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2178 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2180 unsigned long flags;
2181 struct hlist_node *next;
2182 struct lec_arp_table *entry;
2185 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2186 dump_arp_table(priv);
2188 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2190 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2191 hlist_for_each_entry_safe(entry, next,
2192 &priv->lec_arp_tables[i], next) {
2193 if (vcc == entry->vcc) {
2194 lec_arp_remove(priv, entry);
2196 if (priv->mcast_vcc == vcc)
2197 priv->mcast_vcc = NULL;
2202 hlist_for_each_entry_safe(entry, next,
2203 &priv->lec_arp_empty_ones, next) {
2204 if (entry->vcc == vcc) {
2205 lec_arp_clear_vccs(entry);
2206 del_timer(&entry->timer);
2207 hlist_del(&entry->next);
2212 hlist_for_each_entry_safe(entry, next,
2213 &priv->lec_no_forward, next) {
2214 if (entry->recv_vcc == vcc) {
2215 lec_arp_clear_vccs(entry);
2216 del_timer(&entry->timer);
2217 hlist_del(&entry->next);
2222 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2223 if (entry->recv_vcc == vcc) {
2224 lec_arp_clear_vccs(entry);
2225 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2226 hlist_del(&entry->next);
2231 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2232 dump_arp_table(priv);
2236 lec_arp_check_empties(struct lec_priv *priv,
2237 struct atm_vcc *vcc, struct sk_buff *skb)
2239 unsigned long flags;
2240 struct hlist_node *next;
2241 struct lec_arp_table *entry, *tmp;
2242 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2243 unsigned char *src = hdr->h_source;
2245 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2246 hlist_for_each_entry_safe(entry, next,
2247 &priv->lec_arp_empty_ones, next) {
2248 if (vcc == entry->vcc) {
2249 del_timer(&entry->timer);
2250 ether_addr_copy(entry->mac_addr, src);
2251 entry->status = ESI_FORWARD_DIRECT;
2252 entry->last_used = jiffies;
2253 /* We might have got an entry */
2254 tmp = lec_arp_find(priv, src);
2256 lec_arp_remove(priv, tmp);
2259 hlist_del(&entry->next);
2260 lec_arp_add(priv, entry);
2264 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2266 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2269 MODULE_LICENSE("GPL");