2 * lec.c: Lan Emulation driver
4 * Marko Kiiskila <mkiiskila@yahoo.com>
7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
9 #include <linux/slab.h>
10 #include <linux/kernel.h>
11 #include <linux/bitops.h>
12 #include <linux/capability.h>
14 /* We are ethernet device */
15 #include <linux/if_ether.h>
16 #include <linux/netdevice.h>
17 #include <linux/etherdevice.h>
19 #include <linux/skbuff.h>
21 #include <asm/byteorder.h>
22 #include <linux/uaccess.h>
25 #include <linux/proc_fs.h>
26 #include <linux/spinlock.h>
27 #include <linux/seq_file.h>
30 #include <linux/atmdev.h>
31 #include <linux/atmlec.h>
33 /* Proxy LEC knows about bridging */
34 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
35 #include "../bridge/br_private.h"
37 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #include <linux/module.h>
42 #include <linux/init.h>
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 atomic_inc(&entry->usage);
110 static inline void lec_arp_put(struct lec_arp_table *entry)
112 if (atomic_dec_and_test(&entry->usage))
116 static struct lane2_ops lane2_ops = {
117 lane2_resolve, /* resolve, spec 3.1.3 */
118 lane2_associate_req, /* associate_req, spec 3.1.4 */
119 NULL /* associate indicator, spec 3.1.5 */
122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
124 /* Device structures */
125 static struct net_device *dev_lec[MAX_LEC_ITF];
127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
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 /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
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_SKB(skb)->atm_options = vcc->atm_options;
187 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
188 if (vcc->send(vcc, skb) < 0) {
189 dev->stats.tx_dropped++;
193 dev->stats.tx_packets++;
194 dev->stats.tx_bytes += skb->len;
197 static void lec_tx_timeout(struct net_device *dev)
199 pr_info("%s\n", dev->name);
200 dev->trans_start = jiffies;
201 netif_wake_queue(dev);
204 static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
205 struct net_device *dev)
207 struct sk_buff *skb2;
208 struct lec_priv *priv = netdev_priv(dev);
209 struct lecdatahdr_8023 *lec_h;
211 struct lec_arp_table *entry;
216 pr_debug("called\n");
218 pr_info("%s:No lecd attached\n", dev->name);
219 dev->stats.tx_errors++;
220 netif_stop_queue(dev);
225 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
226 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
227 (long)skb_end_pointer(skb));
228 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
229 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
230 lec_handle_bridge(skb, dev);
233 /* Make sure we have room for lec_id */
234 if (skb_headroom(skb) < 2) {
235 pr_debug("reallocating skb\n");
236 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
237 if (unlikely(!skb2)) {
246 /* Put le header to place */
247 lec_h = (struct lecdatahdr_8023 *)skb->data;
248 lec_h->le_header = htons(priv->lecid);
250 #if DUMP_PACKETS >= 2
251 #define MAX_DUMP_SKB 99
252 #elif DUMP_PACKETS >= 1
253 #define MAX_DUMP_SKB 30
255 #if DUMP_PACKETS >= 1
256 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
257 dev->name, skb->len, priv->lecid);
258 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
259 skb->data, min(skb->len, MAX_DUMP_SKB), true);
260 #endif /* DUMP_PACKETS >= 1 */
262 /* Minimum ethernet-frame size */
263 min_frame_size = LEC_MINIMUM_8023_SIZE;
264 if (skb->len < min_frame_size) {
265 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
266 skb2 = skb_copy_expand(skb, 0,
267 min_frame_size - skb->truesize,
271 dev->stats.tx_dropped++;
276 skb_put(skb, min_frame_size - skb->len);
279 /* Send to right vcc */
283 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
284 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
285 dev->name, vcc, vcc ? vcc->flags : 0, entry);
286 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
287 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
288 pr_debug("%s:queuing packet, MAC address %pM\n",
289 dev->name, lec_h->h_dest);
290 skb_queue_tail(&entry->tx_wait, skb);
292 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
293 dev->name, lec_h->h_dest);
294 dev->stats.tx_dropped++;
300 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
301 dev->name, vcc->vpi, vcc->vci);
302 #endif /* DUMP_PACKETS > 0 */
304 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
305 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
311 if (!atm_may_send(vcc, 0)) {
312 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
315 netif_stop_queue(dev);
318 * vcc->pop() might have occurred in between, making
319 * the vcc usuable again. Since xmit is serialized,
320 * this is the only situation we have to re-test.
323 if (atm_may_send(vcc, 0))
324 netif_wake_queue(dev);
330 dev->trans_start = jiffies;
334 /* The inverse routine to net_open(). */
335 static int lec_close(struct net_device *dev)
337 netif_stop_queue(dev);
341 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
344 struct net_device *dev = (struct net_device *)vcc->proto_data;
345 struct lec_priv *priv = netdev_priv(dev);
346 struct atmlec_msg *mesg;
347 struct lec_arp_table *entry;
349 char *tmp; /* FIXME */
351 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
352 mesg = (struct atmlec_msg *)skb->data;
354 tmp += sizeof(struct atmlec_msg);
355 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
356 switch (mesg->type) {
358 for (i = 0; i < 6; i++)
359 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
362 for (i = 0; i < 6; i++)
363 dev->dev_addr[i] = 0;
366 lec_addr_delete(priv, mesg->content.normal.atm_addr,
367 mesg->content.normal.flag);
369 case l_topology_change:
370 priv->topology_change = mesg->content.normal.flag;
372 case l_flush_complete:
373 lec_flush_complete(priv, mesg->content.normal.flag);
375 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
376 spin_lock_irqsave(&priv->lec_arp_lock, flags);
377 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
378 lec_arp_remove(priv, entry);
379 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
381 if (mesg->content.normal.no_source_le_narp)
385 lec_arp_update(priv, mesg->content.normal.mac_addr,
386 mesg->content.normal.atm_addr,
387 mesg->content.normal.flag,
388 mesg->content.normal.targetless_le_arp);
389 pr_debug("in l_arp_update\n");
390 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
391 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
393 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
394 tmp, mesg->sizeoftlvs);
398 priv->maximum_unknown_frame_count =
399 mesg->content.config.maximum_unknown_frame_count;
400 priv->max_unknown_frame_time =
401 (mesg->content.config.max_unknown_frame_time * HZ);
402 priv->max_retry_count = mesg->content.config.max_retry_count;
403 priv->aging_time = (mesg->content.config.aging_time * HZ);
404 priv->forward_delay_time =
405 (mesg->content.config.forward_delay_time * HZ);
406 priv->arp_response_time =
407 (mesg->content.config.arp_response_time * HZ);
408 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
409 priv->path_switching_delay =
410 (mesg->content.config.path_switching_delay * HZ);
411 priv->lane_version = mesg->content.config.lane_version;
413 priv->lane2_ops = NULL;
414 if (priv->lane_version > 1)
415 priv->lane2_ops = &lane2_ops;
417 if (dev_set_mtu(dev, mesg->content.config.mtu))
418 pr_info("%s: change_mtu to %d failed\n",
419 dev->name, mesg->content.config.mtu);
421 priv->is_proxy = mesg->content.config.is_proxy;
423 case l_flush_tran_id:
424 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
425 mesg->content.normal.flag);
429 (unsigned short)(0xffff & mesg->content.normal.flag);
431 case l_should_bridge:
432 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
434 pr_debug("%s: bridge zeppelin asks about %pM\n",
435 dev->name, mesg->content.proxy.mac_addr);
437 if (br_fdb_test_addr_hook == NULL)
440 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
441 /* hit from bridge table, send LE_ARP_RESPONSE */
442 struct sk_buff *skb2;
445 pr_debug("%s: entry found, responding to zeppelin\n",
447 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
450 skb2->len = sizeof(struct atmlec_msg);
451 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
452 atm_force_charge(priv->lecd, skb2->truesize);
453 sk = sk_atm(priv->lecd);
454 skb_queue_tail(&sk->sk_receive_queue, skb2);
455 sk->sk_data_ready(sk);
458 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
461 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
469 static void lec_atm_close(struct atm_vcc *vcc)
472 struct net_device *dev = (struct net_device *)vcc->proto_data;
473 struct lec_priv *priv = netdev_priv(dev);
476 /* Do something needful? */
478 netif_stop_queue(dev);
479 lec_arp_destroy(priv);
481 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
482 pr_info("%s closing with messages pending\n", dev->name);
483 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
484 atm_return(vcc, skb->truesize);
488 pr_info("%s: Shut down!\n", dev->name);
489 module_put(THIS_MODULE);
492 static struct atmdev_ops lecdev_ops = {
493 .close = lec_atm_close,
497 static struct atm_dev lecatm_dev = {
500 .number = 999, /* dummy device number */
501 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
505 * LANE2: new argument struct sk_buff *data contains
506 * the LE_ARP based TLVs introduced in the LANE2 spec
509 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
510 const unsigned char *mac_addr, const unsigned char *atm_addr,
511 struct sk_buff *data)
515 struct atmlec_msg *mesg;
517 if (!priv || !priv->lecd)
519 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
522 skb->len = sizeof(struct atmlec_msg);
523 mesg = (struct atmlec_msg *)skb->data;
524 memset(mesg, 0, sizeof(struct atmlec_msg));
527 mesg->sizeoftlvs = data->len;
529 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
531 mesg->content.normal.targetless_le_arp = 1;
533 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
535 atm_force_charge(priv->lecd, skb->truesize);
536 sk = sk_atm(priv->lecd);
537 skb_queue_tail(&sk->sk_receive_queue, skb);
538 sk->sk_data_ready(sk);
541 pr_debug("about to send %d bytes of data\n", data->len);
542 atm_force_charge(priv->lecd, data->truesize);
543 skb_queue_tail(&sk->sk_receive_queue, data);
544 sk->sk_data_ready(sk);
550 /* shamelessly stolen from drivers/net/net_init.c */
551 static int lec_change_mtu(struct net_device *dev, int new_mtu)
553 if ((new_mtu < 68) || (new_mtu > 18190))
559 static void lec_set_multicast_list(struct net_device *dev)
562 * by default, all multicast frames arrive over the bus.
563 * eventually support selective multicast service
567 static const struct net_device_ops lec_netdev_ops = {
568 .ndo_open = lec_open,
569 .ndo_stop = lec_close,
570 .ndo_start_xmit = lec_start_xmit,
571 .ndo_change_mtu = lec_change_mtu,
572 .ndo_tx_timeout = lec_tx_timeout,
573 .ndo_set_rx_mode = lec_set_multicast_list,
576 static const unsigned char lec_ctrl_magic[] = {
583 #define LEC_DATA_DIRECT_8023 2
584 #define LEC_DATA_DIRECT_8025 3
586 static int lec_is_data_direct(struct atm_vcc *vcc)
588 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
589 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
592 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
595 struct net_device *dev = (struct net_device *)vcc->proto_data;
596 struct lec_priv *priv = netdev_priv(dev);
599 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
600 dev->name, vcc->vpi, vcc->vci);
603 pr_debug("%s: null skb\n", dev->name);
604 lec_vcc_close(priv, vcc);
607 #if DUMP_PACKETS >= 2
608 #define MAX_SKB_DUMP 99
609 #elif DUMP_PACKETS >= 1
610 #define MAX_SKB_DUMP 30
613 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
614 dev->name, skb->len, priv->lecid);
615 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
616 skb->data, min(MAX_SKB_DUMP, skb->len), true);
617 #endif /* DUMP_PACKETS > 0 */
618 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
619 /* Control frame, to daemon */
620 struct sock *sk = sk_atm(vcc);
622 pr_debug("%s: To daemon\n", dev->name);
623 skb_queue_tail(&sk->sk_receive_queue, skb);
624 sk->sk_data_ready(sk);
625 } else { /* Data frame, queue to protocol handlers */
626 struct lec_arp_table *entry;
627 unsigned char *src, *dst;
629 atm_return(vcc, skb->truesize);
630 if (*(__be16 *) skb->data == htons(priv->lecid) ||
631 !priv->lecd || !(dev->flags & IFF_UP)) {
633 * Probably looping back, or if lecd is missing,
636 pr_debug("Ignoring frame...\n");
640 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
643 * If this is a Data Direct VCC, and the VCC does not match
644 * the LE_ARP cache entry, delete the LE_ARP cache entry.
646 spin_lock_irqsave(&priv->lec_arp_lock, flags);
647 if (lec_is_data_direct(vcc)) {
648 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
649 entry = lec_arp_find(priv, src);
650 if (entry && entry->vcc != vcc) {
651 lec_arp_remove(priv, entry);
655 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
657 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
658 !priv->is_proxy && /* Proxy wants all the packets */
659 memcmp(dst, dev->dev_addr, dev->addr_len)) {
663 if (!hlist_empty(&priv->lec_arp_empty_ones))
664 lec_arp_check_empties(priv, vcc, skb);
665 skb_pull(skb, 2); /* skip lec_id */
666 skb->protocol = eth_type_trans(skb, dev);
667 dev->stats.rx_packets++;
668 dev->stats.rx_bytes += skb->len;
669 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
674 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
676 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
677 struct net_device *dev = skb->dev;
680 pr_info("vpriv = NULL!?!?!?\n");
684 vpriv->old_pop(vcc, skb);
686 if (vpriv->xoff && atm_may_send(vcc, 0)) {
688 if (netif_running(dev) && netif_queue_stopped(dev))
689 netif_wake_queue(dev);
693 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
695 struct lec_vcc_priv *vpriv;
697 struct atmlec_ioc ioc_data;
699 /* Lecd must be up in this case */
700 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
702 pr_info("copy from user failed for %d bytes\n", bytes_left);
703 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
705 ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF);
706 if (!dev_lec[ioc_data.dev_num])
708 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
712 vpriv->old_pop = vcc->pop;
713 vcc->user_back = vpriv;
715 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
716 &ioc_data, vcc, vcc->push);
717 vcc->proto_data = dev_lec[ioc_data.dev_num];
718 vcc->push = lec_push;
722 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
724 if (arg < 0 || arg >= MAX_LEC_ITF)
726 arg = array_index_nospec(arg, MAX_LEC_ITF);
729 vcc->proto_data = dev_lec[arg];
730 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
733 /* Initialize device. */
734 static int lecd_attach(struct atm_vcc *vcc, int arg)
737 struct lec_priv *priv;
743 if (arg >= MAX_LEC_ITF)
745 i = array_index_nospec(arg, MAX_LEC_ITF);
749 size = sizeof(struct lec_priv);
750 dev_lec[i] = alloc_etherdev(size);
753 dev_lec[i]->netdev_ops = &lec_netdev_ops;
754 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
755 if (register_netdev(dev_lec[i])) {
756 free_netdev(dev_lec[i]);
760 priv = netdev_priv(dev_lec[i]);
762 priv = netdev_priv(dev_lec[i]);
767 priv->itfnum = i; /* LANE2 addition */
769 vcc->dev = &lecatm_dev;
770 vcc_insert_socket(sk_atm(vcc));
772 vcc->proto_data = dev_lec[i];
773 set_bit(ATM_VF_META, &vcc->flags);
774 set_bit(ATM_VF_READY, &vcc->flags);
776 /* Set default values to these variables */
777 priv->maximum_unknown_frame_count = 1;
778 priv->max_unknown_frame_time = (1 * HZ);
779 priv->vcc_timeout_period = (1200 * HZ);
780 priv->max_retry_count = 1;
781 priv->aging_time = (300 * HZ);
782 priv->forward_delay_time = (15 * HZ);
783 priv->topology_change = 0;
784 priv->arp_response_time = (1 * HZ);
785 priv->flush_timeout = (4 * HZ);
786 priv->path_switching_delay = (6 * HZ);
788 if (dev_lec[i]->flags & IFF_UP)
789 netif_start_queue(dev_lec[i]);
790 __module_get(THIS_MODULE);
794 #ifdef CONFIG_PROC_FS
795 static const char *lec_arp_get_status_string(unsigned char status)
797 static const char *const lec_arp_status_string[] = {
802 "ESI_FLUSH_PENDING ",
806 if (status > ESI_FORWARD_DIRECT)
807 status = 3; /* ESI_UNDEFINED */
808 return lec_arp_status_string[status];
811 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
815 for (i = 0; i < ETH_ALEN; i++)
816 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
817 seq_printf(seq, " ");
818 for (i = 0; i < ATM_ESA_LEN; i++)
819 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
820 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
821 entry->flags & 0xffff);
823 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
825 seq_printf(seq, " ");
826 if (entry->recv_vcc) {
827 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
828 entry->recv_vcc->vci);
835 struct lec_priv *locked;
836 struct hlist_node *node;
837 struct net_device *dev;
843 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
846 struct hlist_node *e = state->node;
850 if (e == SEQ_START_TOKEN) {
855 for (; e; e = e->next) {
861 return (*l < 0) ? state : NULL;
864 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
865 struct lec_priv *priv)
870 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
871 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
875 state->arp_table = p;
879 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
880 struct lec_priv *priv)
882 struct hlist_head *lec_misc_tables[] = {
883 &priv->lec_arp_empty_ones,
884 &priv->lec_no_forward,
890 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
891 v = lec_tbl_walk(state, lec_misc_tables[q], l);
895 state->misc_table = q;
899 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
900 struct lec_priv *priv)
902 if (!state->locked) {
903 state->locked = priv;
904 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
906 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
907 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
908 state->locked = NULL;
909 /* Partial state reset for the next time we get called */
910 state->arp_table = state->misc_table = 0;
912 return state->locked;
915 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
917 struct net_device *dev;
920 dev = state->dev ? state->dev : dev_lec[state->itf];
921 v = (dev && netdev_priv(dev)) ?
922 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
925 /* Partial state reset for the next time we get called */
932 static void *lec_get_idx(struct lec_state *state, loff_t l)
936 for (; state->itf < MAX_LEC_ITF; state->itf++) {
937 v = lec_itf_walk(state, &l);
944 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
946 struct lec_state *state = seq->private;
950 state->locked = NULL;
951 state->arp_table = 0;
952 state->misc_table = 0;
953 state->node = SEQ_START_TOKEN;
955 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
958 static void lec_seq_stop(struct seq_file *seq, void *v)
960 struct lec_state *state = seq->private;
963 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
969 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
971 struct lec_state *state = seq->private;
973 v = lec_get_idx(state, 1);
974 *pos += !!PTR_ERR(v);
978 static int lec_seq_show(struct seq_file *seq, void *v)
980 static const char lec_banner[] =
981 "Itf MAC ATM destination"
983 "VPI/VCI Recv VPI/VCI\n";
985 if (v == SEQ_START_TOKEN)
986 seq_puts(seq, lec_banner);
988 struct lec_state *state = seq->private;
989 struct net_device *dev = state->dev;
990 struct lec_arp_table *entry = hlist_entry(state->node,
991 struct lec_arp_table,
994 seq_printf(seq, "%s ", dev->name);
995 lec_info(seq, entry);
1000 static const struct seq_operations lec_seq_ops = {
1001 .start = lec_seq_start,
1002 .next = lec_seq_next,
1003 .stop = lec_seq_stop,
1004 .show = lec_seq_show,
1007 static int lec_seq_open(struct inode *inode, struct file *file)
1009 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1012 static const struct file_operations lec_seq_fops = {
1013 .owner = THIS_MODULE,
1014 .open = lec_seq_open,
1016 .llseek = seq_lseek,
1017 .release = seq_release_private,
1021 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1023 struct atm_vcc *vcc = ATM_SD(sock);
1030 if (!capable(CAP_NET_ADMIN))
1034 return -ENOIOCTLCMD;
1039 err = lecd_attach(vcc, (int)arg);
1041 sock->state = SS_CONNECTED;
1044 err = lec_mcast_attach(vcc, (int)arg);
1047 err = lec_vcc_attach(vcc, (void __user *)arg);
1054 static struct atm_ioctl lane_ioctl_ops = {
1055 .owner = THIS_MODULE,
1056 .ioctl = lane_ioctl,
1059 static int __init lane_module_init(void)
1061 #ifdef CONFIG_PROC_FS
1062 struct proc_dir_entry *p;
1064 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1066 pr_err("Unable to initialize /proc/net/atm/lec\n");
1071 register_atm_ioctl(&lane_ioctl_ops);
1072 pr_info("lec.c: initialized\n");
1076 static void __exit lane_module_cleanup(void)
1080 remove_proc_entry("lec", atm_proc_root);
1082 deregister_atm_ioctl(&lane_ioctl_ops);
1084 for (i = 0; i < MAX_LEC_ITF; i++) {
1085 if (dev_lec[i] != NULL) {
1086 unregister_netdev(dev_lec[i]);
1087 free_netdev(dev_lec[i]);
1093 module_init(lane_module_init);
1094 module_exit(lane_module_cleanup);
1097 * LANE2: 3.1.3, LE_RESOLVE.request
1098 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1099 * If sizeoftlvs == NULL the default TLVs associated with with this
1101 * If dst_mac == NULL, targetless LE_ARP will be sent
1103 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1104 u8 **tlvs, u32 *sizeoftlvs)
1106 unsigned long flags;
1107 struct lec_priv *priv = netdev_priv(dev);
1108 struct lec_arp_table *table;
1109 struct sk_buff *skb;
1113 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1114 table = lec_arp_find(priv, dst_mac);
1115 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1119 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1123 *sizeoftlvs = table->sizeoftlvs;
1128 if (sizeoftlvs == NULL)
1129 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1132 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1135 skb->len = *sizeoftlvs;
1136 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1137 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1143 * LANE2: 3.1.4, LE_ASSOCIATE.request
1144 * Associate the *tlvs with the *lan_dst address.
1145 * Will overwrite any previous association
1146 * Returns 1 for success, 0 for failure (out of memory)
1149 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1150 const u8 *tlvs, u32 sizeoftlvs)
1153 struct sk_buff *skb;
1154 struct lec_priv *priv = netdev_priv(dev);
1156 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1157 return 0; /* not our mac address */
1159 kfree(priv->tlvs); /* NULL if there was no previous association */
1161 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1162 if (priv->tlvs == NULL)
1164 priv->sizeoftlvs = sizeoftlvs;
1166 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1169 skb->len = sizeoftlvs;
1170 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1171 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1173 pr_info("lec.c: lane2_associate_req() failed\n");
1175 * If the previous association has changed we must
1176 * somehow notify other LANE entities about the change
1182 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1185 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1186 const u8 *tlvs, u32 sizeoftlvs)
1191 struct lec_priv *priv = netdev_priv(dev);
1193 * Why have the TLVs in LE_ARP entries
1194 * since we do not use them? When you
1195 * uncomment this code, make sure the
1196 * TLVs get freed when entry is killed
1198 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1201 return; /* should not happen */
1205 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1206 if (entry->tlvs == NULL)
1208 entry->sizeoftlvs = sizeoftlvs;
1212 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1213 while (i < sizeoftlvs)
1214 pr_cont("%02x ", tlvs[i++]);
1219 /* tell MPOA about the TLVs we saw */
1220 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1221 priv->lane2_ops->associate_indicator(dev, mac_addr,
1227 * Here starts what used to lec_arpc.c
1229 * lec_arpc.c was added here when making
1230 * lane client modular. October 1997
1233 #include <linux/types.h>
1234 #include <linux/timer.h>
1235 #include <linux/param.h>
1236 #include <linux/atomic.h>
1237 #include <linux/inetdevice.h>
1238 #include <net/route.h>
1241 #define pr_debug(format, args...)
1243 #define pr_debug printk
1246 #define DEBUG_ARP_TABLE 0
1248 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1250 static void lec_arp_check_expire(struct work_struct *work);
1251 static void lec_arp_expire_arp(unsigned long data);
1257 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1260 * Initialization of arp-cache
1262 static void lec_arp_init(struct lec_priv *priv)
1266 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1267 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1268 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1269 INIT_HLIST_HEAD(&priv->lec_no_forward);
1270 INIT_HLIST_HEAD(&priv->mcast_fwds);
1271 spin_lock_init(&priv->lec_arp_lock);
1272 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1273 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1276 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1279 struct atm_vcc *vcc = entry->vcc;
1280 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1281 struct net_device *dev = (struct net_device *)vcc->proto_data;
1283 vcc->pop = vpriv->old_pop;
1285 netif_wake_queue(dev);
1287 vcc->user_back = NULL;
1288 vcc->push = entry->old_push;
1289 vcc_release_async(vcc, -EPIPE);
1292 if (entry->recv_vcc) {
1293 struct atm_vcc *vcc = entry->recv_vcc;
1294 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1297 vcc->user_back = NULL;
1299 entry->recv_vcc->push = entry->old_recv_push;
1300 vcc_release_async(entry->recv_vcc, -EPIPE);
1301 entry->recv_vcc = NULL;
1306 * Insert entry to lec_arp_table
1307 * LANE2: Add to the end of the list to satisfy 8.1.13
1310 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1312 struct hlist_head *tmp;
1314 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1315 hlist_add_head(&entry->next, tmp);
1317 pr_debug("Added entry:%pM\n", entry->mac_addr);
1321 * Remove entry from lec_arp_table
1324 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1326 struct lec_arp_table *entry;
1327 int i, remove_vcc = 1;
1332 hlist_del(&to_remove->next);
1333 del_timer(&to_remove->timer);
1336 * If this is the only MAC connected to this VCC,
1337 * also tear down the VCC
1339 if (to_remove->status >= ESI_FLUSH_PENDING) {
1341 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1343 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1344 hlist_for_each_entry(entry,
1345 &priv->lec_arp_tables[i], next) {
1346 if (memcmp(to_remove->atm_addr,
1347 entry->atm_addr, ATM_ESA_LEN) == 0) {
1354 lec_arp_clear_vccs(to_remove);
1356 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1358 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1363 static const char *get_status_string(unsigned char st)
1367 return "ESI_UNKNOWN";
1368 case ESI_ARP_PENDING:
1369 return "ESI_ARP_PENDING";
1370 case ESI_VC_PENDING:
1371 return "ESI_VC_PENDING";
1372 case ESI_FLUSH_PENDING:
1373 return "ESI_FLUSH_PENDING";
1374 case ESI_FORWARD_DIRECT:
1375 return "ESI_FORWARD_DIRECT";
1380 static void dump_arp_table(struct lec_priv *priv)
1382 struct lec_arp_table *rulla;
1386 pr_info("Dump %p:\n", priv);
1387 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1388 hlist_for_each_entry(rulla,
1389 &priv->lec_arp_tables[i], next) {
1391 offset += sprintf(buf, "%d: %p\n", i, rulla);
1392 offset += sprintf(buf + offset, "Mac: %pM",
1394 offset += sprintf(buf + offset, " Atm:");
1395 for (j = 0; j < ATM_ESA_LEN; j++) {
1396 offset += sprintf(buf + offset,
1398 rulla->atm_addr[j] & 0xff);
1400 offset += sprintf(buf + offset,
1401 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1402 rulla->vcc ? rulla->vcc->vpi : 0,
1403 rulla->vcc ? rulla->vcc->vci : 0,
1404 rulla->recv_vcc ? rulla->recv_vcc->
1406 rulla->recv_vcc ? rulla->recv_vcc->
1407 vci : 0, rulla->last_used,
1408 rulla->timestamp, rulla->no_tries);
1410 sprintf(buf + offset,
1411 "Flags:%x, Packets_flooded:%x, Status: %s ",
1412 rulla->flags, rulla->packets_flooded,
1413 get_status_string(rulla->status));
1414 pr_info("%s\n", buf);
1418 if (!hlist_empty(&priv->lec_no_forward))
1419 pr_info("No forward\n");
1420 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1422 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1423 offset += sprintf(buf + offset, " Atm:");
1424 for (j = 0; j < ATM_ESA_LEN; j++) {
1425 offset += sprintf(buf + offset, "%2.2x ",
1426 rulla->atm_addr[j] & 0xff);
1428 offset += sprintf(buf + offset,
1429 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1430 rulla->vcc ? rulla->vcc->vpi : 0,
1431 rulla->vcc ? rulla->vcc->vci : 0,
1432 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1433 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1435 rulla->timestamp, rulla->no_tries);
1436 offset += sprintf(buf + offset,
1437 "Flags:%x, Packets_flooded:%x, Status: %s ",
1438 rulla->flags, rulla->packets_flooded,
1439 get_status_string(rulla->status));
1440 pr_info("%s\n", buf);
1443 if (!hlist_empty(&priv->lec_arp_empty_ones))
1444 pr_info("Empty ones\n");
1445 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1447 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1448 offset += sprintf(buf + offset, " Atm:");
1449 for (j = 0; j < ATM_ESA_LEN; j++) {
1450 offset += sprintf(buf + offset, "%2.2x ",
1451 rulla->atm_addr[j] & 0xff);
1453 offset += sprintf(buf + offset,
1454 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1455 rulla->vcc ? rulla->vcc->vpi : 0,
1456 rulla->vcc ? rulla->vcc->vci : 0,
1457 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1458 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1460 rulla->timestamp, rulla->no_tries);
1461 offset += sprintf(buf + offset,
1462 "Flags:%x, Packets_flooded:%x, Status: %s ",
1463 rulla->flags, rulla->packets_flooded,
1464 get_status_string(rulla->status));
1468 if (!hlist_empty(&priv->mcast_fwds))
1469 pr_info("Multicast Forward VCCs\n");
1470 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1472 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1473 offset += sprintf(buf + offset, " Atm:");
1474 for (j = 0; j < ATM_ESA_LEN; j++) {
1475 offset += sprintf(buf + offset, "%2.2x ",
1476 rulla->atm_addr[j] & 0xff);
1478 offset += sprintf(buf + offset,
1479 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1480 rulla->vcc ? rulla->vcc->vpi : 0,
1481 rulla->vcc ? rulla->vcc->vci : 0,
1482 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1483 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1485 rulla->timestamp, rulla->no_tries);
1486 offset += sprintf(buf + offset,
1487 "Flags:%x, Packets_flooded:%x, Status: %s ",
1488 rulla->flags, rulla->packets_flooded,
1489 get_status_string(rulla->status));
1490 pr_info("%s\n", buf);
1495 #define dump_arp_table(priv) do { } while (0)
1499 * Destruction of arp-cache
1501 static void lec_arp_destroy(struct lec_priv *priv)
1503 unsigned long flags;
1504 struct hlist_node *next;
1505 struct lec_arp_table *entry;
1508 cancel_delayed_work_sync(&priv->lec_arp_work);
1511 * Remove all entries
1514 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1515 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1516 hlist_for_each_entry_safe(entry, next,
1517 &priv->lec_arp_tables[i], next) {
1518 lec_arp_remove(priv, entry);
1521 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1524 hlist_for_each_entry_safe(entry, next,
1525 &priv->lec_arp_empty_ones, next) {
1526 del_timer_sync(&entry->timer);
1527 lec_arp_clear_vccs(entry);
1528 hlist_del(&entry->next);
1531 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1533 hlist_for_each_entry_safe(entry, next,
1534 &priv->lec_no_forward, next) {
1535 del_timer_sync(&entry->timer);
1536 lec_arp_clear_vccs(entry);
1537 hlist_del(&entry->next);
1540 INIT_HLIST_HEAD(&priv->lec_no_forward);
1542 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1543 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1544 lec_arp_clear_vccs(entry);
1545 hlist_del(&entry->next);
1548 INIT_HLIST_HEAD(&priv->mcast_fwds);
1549 priv->mcast_vcc = NULL;
1550 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1554 * Find entry by mac_address
1556 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1557 const unsigned char *mac_addr)
1559 struct hlist_head *head;
1560 struct lec_arp_table *entry;
1562 pr_debug("%pM\n", mac_addr);
1564 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1565 hlist_for_each_entry(entry, head, next) {
1566 if (ether_addr_equal(mac_addr, entry->mac_addr))
1572 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1573 const unsigned char *mac_addr)
1575 struct lec_arp_table *to_return;
1577 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1579 pr_info("LEC: Arp entry kmalloc failed\n");
1582 ether_addr_copy(to_return->mac_addr, mac_addr);
1583 INIT_HLIST_NODE(&to_return->next);
1584 setup_timer(&to_return->timer, lec_arp_expire_arp,
1585 (unsigned long)to_return);
1586 to_return->last_used = jiffies;
1587 to_return->priv = priv;
1588 skb_queue_head_init(&to_return->tx_wait);
1589 atomic_set(&to_return->usage, 1);
1593 /* Arp sent timer expired */
1594 static void lec_arp_expire_arp(unsigned long data)
1596 struct lec_arp_table *entry;
1598 entry = (struct lec_arp_table *)data;
1601 if (entry->status == ESI_ARP_PENDING) {
1602 if (entry->no_tries <= entry->priv->max_retry_count) {
1603 if (entry->is_rdesc)
1604 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1605 entry->mac_addr, NULL, NULL);
1607 send_to_lecd(entry->priv, l_arp_xmt,
1608 entry->mac_addr, NULL, NULL);
1611 mod_timer(&entry->timer, jiffies + (1 * HZ));
1615 /* Unknown/unused vcc expire, remove associated entry */
1616 static void lec_arp_expire_vcc(unsigned long data)
1618 unsigned long flags;
1619 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1620 struct lec_priv *priv = to_remove->priv;
1622 del_timer(&to_remove->timer);
1624 pr_debug("%p %p: vpi:%d vci:%d\n",
1626 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1627 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1629 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1630 hlist_del(&to_remove->next);
1631 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1633 lec_arp_clear_vccs(to_remove);
1634 lec_arp_put(to_remove);
1637 static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1639 struct lec_priv *priv)
1641 unsigned long time_to_check;
1643 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1644 time_to_check = priv->forward_delay_time;
1646 time_to_check = priv->aging_time;
1648 pr_debug("About to expire: %lx - %lx > %lx\n",
1649 now, entry->last_used, time_to_check);
1650 if (time_after(now, entry->last_used + time_to_check) &&
1651 !(entry->flags & LEC_PERMANENT_FLAG) &&
1652 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1654 pr_debug("Entry timed out\n");
1655 lec_arp_remove(priv, entry);
1658 /* Something else */
1659 if ((entry->status == ESI_VC_PENDING ||
1660 entry->status == ESI_ARP_PENDING) &&
1661 time_after_eq(now, entry->timestamp +
1662 priv->max_unknown_frame_time)) {
1663 entry->timestamp = jiffies;
1664 entry->packets_flooded = 0;
1665 if (entry->status == ESI_VC_PENDING)
1666 send_to_lecd(priv, l_svc_setup,
1671 if (entry->status == ESI_FLUSH_PENDING &&
1672 time_after_eq(now, entry->timestamp +
1673 priv->path_switching_delay)) {
1674 lec_arp_hold(entry);
1684 * 2. For each entry, delete entries that have aged past the age limit.
1685 * 3. For each entry, depending on the status of the entry, perform
1686 * the following maintenance.
1687 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1688 * tick_count is above the max_unknown_frame_time, clear
1689 * the tick_count to zero and clear the packets_flooded counter
1690 * to zero. This supports the packet rate limit per address
1691 * while flooding unknowns.
1692 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1693 * than or equal to the path_switching_delay, change the status
1694 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1695 * regardless of the progress of the flush protocol.
1697 static void lec_arp_check_expire(struct work_struct *work)
1699 unsigned long flags;
1700 struct lec_priv *priv =
1701 container_of(work, struct lec_priv, lec_arp_work.work);
1702 struct hlist_node *next;
1703 struct lec_arp_table *entry;
1707 pr_debug("%p\n", priv);
1710 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1711 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1712 hlist_for_each_entry_safe(entry, next,
1713 &priv->lec_arp_tables[i], next) {
1714 if (__lec_arp_check_expire(entry, now, priv)) {
1715 struct sk_buff *skb;
1716 struct atm_vcc *vcc = entry->vcc;
1718 spin_unlock_irqrestore(&priv->lec_arp_lock,
1720 while ((skb = skb_dequeue(&entry->tx_wait)))
1722 entry->last_used = jiffies;
1723 entry->status = ESI_FORWARD_DIRECT;
1730 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1732 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1736 * Try to find vcc where mac_address is attached.
1739 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1740 const unsigned char *mac_to_find,
1742 struct lec_arp_table **ret_entry)
1744 unsigned long flags;
1745 struct lec_arp_table *entry;
1746 struct atm_vcc *found;
1748 if (mac_to_find[0] & 0x01) {
1749 switch (priv->lane_version) {
1751 return priv->mcast_vcc;
1752 case 2: /* LANE2 wants arp for multicast addresses */
1753 if (ether_addr_equal(mac_to_find, bus_mac))
1754 return priv->mcast_vcc;
1761 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1762 entry = lec_arp_find(priv, mac_to_find);
1765 if (entry->status == ESI_FORWARD_DIRECT) {
1767 entry->last_used = jiffies;
1768 lec_arp_hold(entry);
1774 * If the LE_ARP cache entry is still pending, reset count to 0
1775 * so another LE_ARP request can be made for this frame.
1777 if (entry->status == ESI_ARP_PENDING)
1778 entry->no_tries = 0;
1780 * Data direct VC not yet set up, check to see if the unknown
1781 * frame count is greater than the limit. If the limit has
1782 * not been reached, allow the caller to send packet to
1785 if (entry->status != ESI_FLUSH_PENDING &&
1786 entry->packets_flooded <
1787 priv->maximum_unknown_frame_count) {
1788 entry->packets_flooded++;
1789 pr_debug("Flooding..\n");
1790 found = priv->mcast_vcc;
1794 * We got here because entry->status == ESI_FLUSH_PENDING
1795 * or BUS flood limit was reached for an entry which is
1796 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1798 lec_arp_hold(entry);
1800 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1804 /* No matching entry was found */
1805 entry = make_entry(priv, mac_to_find);
1806 pr_debug("Making entry\n");
1808 found = priv->mcast_vcc;
1811 lec_arp_add(priv, entry);
1812 /* We want arp-request(s) to be sent */
1813 entry->packets_flooded = 1;
1814 entry->status = ESI_ARP_PENDING;
1815 entry->no_tries = 1;
1816 entry->last_used = entry->timestamp = jiffies;
1817 entry->is_rdesc = is_rdesc;
1818 if (entry->is_rdesc)
1819 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1822 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1823 entry->timer.expires = jiffies + (1 * HZ);
1824 entry->timer.function = lec_arp_expire_arp;
1825 add_timer(&entry->timer);
1826 found = priv->mcast_vcc;
1830 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1835 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1836 unsigned long permanent)
1838 unsigned long flags;
1839 struct hlist_node *next;
1840 struct lec_arp_table *entry;
1844 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1845 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1846 hlist_for_each_entry_safe(entry, next,
1847 &priv->lec_arp_tables[i], next) {
1848 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1850 !(entry->flags & LEC_PERMANENT_FLAG))) {
1851 lec_arp_remove(priv, entry);
1854 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1858 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1863 * Notifies: Response to arp_request (atm_addr != NULL)
1866 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1867 const unsigned char *atm_addr, unsigned long remoteflag,
1868 unsigned int targetless_le_arp)
1870 unsigned long flags;
1871 struct hlist_node *next;
1872 struct lec_arp_table *entry, *tmp;
1875 pr_debug("%smac:%pM\n",
1876 (targetless_le_arp) ? "targetless " : "", mac_addr);
1878 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1879 entry = lec_arp_find(priv, mac_addr);
1880 if (entry == NULL && targetless_le_arp)
1882 * LANE2: ignore targetless LE_ARPs for which
1883 * we have no entry in the cache. 7.1.30
1885 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1886 hlist_for_each_entry_safe(entry, next,
1887 &priv->lec_arp_empty_ones, next) {
1888 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1889 hlist_del(&entry->next);
1890 del_timer(&entry->timer);
1891 tmp = lec_arp_find(priv, mac_addr);
1893 del_timer(&tmp->timer);
1894 tmp->status = ESI_FORWARD_DIRECT;
1895 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1896 tmp->vcc = entry->vcc;
1897 tmp->old_push = entry->old_push;
1898 tmp->last_used = jiffies;
1899 del_timer(&entry->timer);
1903 entry->status = ESI_FORWARD_DIRECT;
1904 ether_addr_copy(entry->mac_addr,
1906 entry->last_used = jiffies;
1907 lec_arp_add(priv, entry);
1910 entry->flags |= LEC_REMOTE_FLAG;
1912 entry->flags &= ~LEC_REMOTE_FLAG;
1913 pr_debug("After update\n");
1914 dump_arp_table(priv);
1920 entry = lec_arp_find(priv, mac_addr);
1922 entry = make_entry(priv, mac_addr);
1925 entry->status = ESI_UNKNOWN;
1926 lec_arp_add(priv, entry);
1927 /* Temporary, changes before end of function */
1929 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1930 del_timer(&entry->timer);
1931 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1932 hlist_for_each_entry(tmp,
1933 &priv->lec_arp_tables[i], next) {
1935 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1936 /* Vcc to this host exists */
1937 if (tmp->status > ESI_VC_PENDING) {
1939 * ESI_FLUSH_PENDING,
1940 * ESI_FORWARD_DIRECT
1942 entry->vcc = tmp->vcc;
1943 entry->old_push = tmp->old_push;
1945 entry->status = tmp->status;
1951 entry->flags |= LEC_REMOTE_FLAG;
1953 entry->flags &= ~LEC_REMOTE_FLAG;
1954 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1955 entry->status = ESI_VC_PENDING;
1956 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1958 pr_debug("After update2\n");
1959 dump_arp_table(priv);
1961 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1965 * Notifies: Vcc setup ready
1968 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1969 struct atm_vcc *vcc,
1970 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1972 unsigned long flags;
1973 struct lec_arp_table *entry;
1974 int i, found_entry = 0;
1976 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1977 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1978 if (ioc_data->receive == 2) {
1979 pr_debug("LEC_ARP: Attaching mcast forward\n");
1981 entry = lec_arp_find(priv, bus_mac);
1983 pr_info("LEC_ARP: Multicast entry not found!\n");
1986 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1987 entry->recv_vcc = vcc;
1988 entry->old_recv_push = old_push;
1990 entry = make_entry(priv, bus_mac);
1993 del_timer(&entry->timer);
1994 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1995 entry->recv_vcc = vcc;
1996 entry->old_recv_push = old_push;
1997 hlist_add_head(&entry->next, &priv->mcast_fwds);
1999 } else if (ioc_data->receive == 1) {
2001 * Vcc which we don't want to make default vcc,
2004 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",
2005 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2006 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2007 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2008 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2009 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2010 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2011 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2012 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2013 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2014 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2015 entry = make_entry(priv, bus_mac);
2018 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2019 eth_zero_addr(entry->mac_addr);
2020 entry->recv_vcc = vcc;
2021 entry->old_recv_push = old_push;
2022 entry->status = ESI_UNKNOWN;
2023 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2024 entry->timer.function = lec_arp_expire_vcc;
2025 hlist_add_head(&entry->next, &priv->lec_no_forward);
2026 add_timer(&entry->timer);
2027 dump_arp_table(priv);
2030 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",
2031 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2032 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2033 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2034 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2035 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2036 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2037 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2038 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2039 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2040 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2041 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2042 hlist_for_each_entry(entry,
2043 &priv->lec_arp_tables[i], next) {
2045 (ioc_data->atm_addr, entry->atm_addr,
2046 ATM_ESA_LEN) == 0) {
2047 pr_debug("LEC_ARP: Attaching data direct\n");
2048 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2049 entry->vcc ? entry->vcc->vci : 0,
2050 entry->recv_vcc ? entry->recv_vcc->
2053 del_timer(&entry->timer);
2055 entry->old_push = old_push;
2056 if (entry->status == ESI_VC_PENDING) {
2057 if (priv->maximum_unknown_frame_count
2062 entry->timestamp = jiffies;
2066 send_to_lecd(priv, l_flush_xmt,
2074 * They were forming a connection
2075 * to us, and we to them. Our
2076 * ATM address is numerically lower
2077 * than theirs, so we make connection
2078 * we formed into default VCC (8.1.11).
2079 * Connection they made gets torn
2080 * down. This might confuse some
2081 * clients. Can be changed if
2082 * someone reports trouble...
2090 pr_debug("After vcc was added\n");
2091 dump_arp_table(priv);
2095 * Not found, snatch address from first data packet that arrives
2098 entry = make_entry(priv, bus_mac);
2102 entry->old_push = old_push;
2103 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2104 eth_zero_addr(entry->mac_addr);
2105 entry->status = ESI_UNKNOWN;
2106 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2107 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2108 entry->timer.function = lec_arp_expire_vcc;
2109 add_timer(&entry->timer);
2110 pr_debug("After vcc was added\n");
2111 dump_arp_table(priv);
2113 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2116 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2118 unsigned long flags;
2119 struct lec_arp_table *entry;
2122 pr_debug("%lx\n", tran_id);
2124 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2125 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2126 hlist_for_each_entry(entry,
2127 &priv->lec_arp_tables[i], next) {
2128 if (entry->flush_tran_id == tran_id &&
2129 entry->status == ESI_FLUSH_PENDING) {
2130 struct sk_buff *skb;
2131 struct atm_vcc *vcc = entry->vcc;
2133 lec_arp_hold(entry);
2134 spin_unlock_irqrestore(&priv->lec_arp_lock,
2136 while ((skb = skb_dequeue(&entry->tx_wait)))
2138 entry->last_used = jiffies;
2139 entry->status = ESI_FORWARD_DIRECT;
2141 pr_debug("LEC_ARP: Flushed\n");
2146 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2147 dump_arp_table(priv);
2151 lec_set_flush_tran_id(struct lec_priv *priv,
2152 const unsigned char *atm_addr, unsigned long tran_id)
2154 unsigned long flags;
2155 struct lec_arp_table *entry;
2158 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2159 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2160 hlist_for_each_entry(entry,
2161 &priv->lec_arp_tables[i], next) {
2162 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2163 entry->flush_tran_id = tran_id;
2164 pr_debug("Set flush transaction id to %lx for %p\n",
2168 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2171 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2173 unsigned long flags;
2174 unsigned char mac_addr[] = {
2175 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2177 struct lec_arp_table *to_add;
2178 struct lec_vcc_priv *vpriv;
2181 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2185 vpriv->old_pop = vcc->pop;
2186 vcc->user_back = vpriv;
2188 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2189 to_add = make_entry(priv, mac_addr);
2191 vcc->pop = vpriv->old_pop;
2196 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2197 to_add->status = ESI_FORWARD_DIRECT;
2198 to_add->flags |= LEC_PERMANENT_FLAG;
2200 to_add->old_push = vcc->push;
2201 vcc->push = lec_push;
2202 priv->mcast_vcc = vcc;
2203 lec_arp_add(priv, to_add);
2205 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2209 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2211 unsigned long flags;
2212 struct hlist_node *next;
2213 struct lec_arp_table *entry;
2216 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2217 dump_arp_table(priv);
2219 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2221 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2222 hlist_for_each_entry_safe(entry, next,
2223 &priv->lec_arp_tables[i], next) {
2224 if (vcc == entry->vcc) {
2225 lec_arp_remove(priv, entry);
2227 if (priv->mcast_vcc == vcc)
2228 priv->mcast_vcc = NULL;
2233 hlist_for_each_entry_safe(entry, next,
2234 &priv->lec_arp_empty_ones, next) {
2235 if (entry->vcc == vcc) {
2236 lec_arp_clear_vccs(entry);
2237 del_timer(&entry->timer);
2238 hlist_del(&entry->next);
2243 hlist_for_each_entry_safe(entry, next,
2244 &priv->lec_no_forward, next) {
2245 if (entry->recv_vcc == vcc) {
2246 lec_arp_clear_vccs(entry);
2247 del_timer(&entry->timer);
2248 hlist_del(&entry->next);
2253 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2254 if (entry->recv_vcc == vcc) {
2255 lec_arp_clear_vccs(entry);
2256 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2257 hlist_del(&entry->next);
2262 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2263 dump_arp_table(priv);
2267 lec_arp_check_empties(struct lec_priv *priv,
2268 struct atm_vcc *vcc, struct sk_buff *skb)
2270 unsigned long flags;
2271 struct hlist_node *next;
2272 struct lec_arp_table *entry, *tmp;
2273 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2274 unsigned char *src = hdr->h_source;
2276 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2277 hlist_for_each_entry_safe(entry, next,
2278 &priv->lec_arp_empty_ones, next) {
2279 if (vcc == entry->vcc) {
2280 del_timer(&entry->timer);
2281 ether_addr_copy(entry->mac_addr, src);
2282 entry->status = ESI_FORWARD_DIRECT;
2283 entry->last_used = jiffies;
2284 /* We might have got an entry */
2285 tmp = lec_arp_find(priv, src);
2287 lec_arp_remove(priv, tmp);
2290 hlist_del(&entry->next);
2291 lec_arp_add(priv, entry);
2295 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2297 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2300 MODULE_LICENSE("GPL");