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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * lec.c: Lan Emulation driver
4 *
5 * Marko Kiiskila <mkiiskila@yahoo.com>
6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
9
10#include <linux/slab.h>
11#include <linux/kernel.h>
12#include <linux/bitops.h>
13#include <linux/capability.h>
14
15/* We are ethernet device */
16#include <linux/if_ether.h>
17#include <linux/netdevice.h>
18#include <linux/etherdevice.h>
19#include <net/sock.h>
20#include <linux/skbuff.h>
21#include <linux/ip.h>
22#include <asm/byteorder.h>
23#include <linux/uaccess.h>
24#include <net/arp.h>
25#include <net/dst.h>
26#include <linux/proc_fs.h>
27#include <linux/spinlock.h>
28#include <linux/seq_file.h>
29
30/* And atm device */
31#include <linux/atmdev.h>
32#include <linux/atmlec.h>
33
34/* Proxy LEC knows about bridging */
35#if IS_ENABLED(CONFIG_BRIDGE)
36#include "../bridge/br_private.h"
37
38static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
39#endif
40
41/* Modular too */
42#include <linux/module.h>
43#include <linux/init.h>
44
45/* Hardening for Spectre-v1 */
46#include <linux/nospec.h>
47
48#include "lec.h"
49#include "lec_arpc.h"
50#include "resources.h"
51
52#define DUMP_PACKETS 0 /*
53 * 0 = None,
54 * 1 = 30 first bytes
55 * 2 = Whole packet
56 */
57
58#define LEC_UNRES_QUE_LEN 8 /*
59 * number of tx packets to queue for a
60 * single destination while waiting for SVC
61 */
62
63static int lec_open(struct net_device *dev);
64static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
65 struct net_device *dev);
66static int lec_close(struct net_device *dev);
67static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
68 const unsigned char *mac_addr);
69static int lec_arp_remove(struct lec_priv *priv,
70 struct lec_arp_table *to_remove);
71/* LANE2 functions */
72static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
73 const u8 *tlvs, u32 sizeoftlvs);
74static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
75 u8 **tlvs, u32 *sizeoftlvs);
76static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
77 const u8 *tlvs, u32 sizeoftlvs);
78
79static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
80 unsigned long permanent);
81static void lec_arp_check_empties(struct lec_priv *priv,
82 struct atm_vcc *vcc, struct sk_buff *skb);
83static void lec_arp_destroy(struct lec_priv *priv);
84static void lec_arp_init(struct lec_priv *priv);
85static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
86 const unsigned char *mac_to_find,
87 int is_rdesc,
88 struct lec_arp_table **ret_entry);
89static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
90 const unsigned char *atm_addr,
91 unsigned long remoteflag,
92 unsigned int targetless_le_arp);
93static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
94static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
95static void lec_set_flush_tran_id(struct lec_priv *priv,
96 const unsigned char *atm_addr,
97 unsigned long tran_id);
98static void lec_vcc_added(struct lec_priv *priv,
99 const struct atmlec_ioc *ioc_data,
100 struct atm_vcc *vcc,
101 void (*old_push)(struct atm_vcc *vcc,
102 struct sk_buff *skb));
103static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
104
105/* must be done under lec_arp_lock */
106static inline void lec_arp_hold(struct lec_arp_table *entry)
107{
108 refcount_inc(&entry->usage);
109}
110
111static inline void lec_arp_put(struct lec_arp_table *entry)
112{
113 if (refcount_dec_and_test(&entry->usage))
114 kfree(entry);
115}
116
117static struct lane2_ops lane2_ops = {
118 .resolve = lane2_resolve, /* spec 3.1.3 */
119 .associate_req = lane2_associate_req, /* spec 3.1.4 */
120 .associate_indicator = NULL /* spec 3.1.5 */
121};
122
123static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
124
125/* Device structures */
126static struct net_device *dev_lec[MAX_LEC_ITF];
127
128#if IS_ENABLED(CONFIG_BRIDGE)
129static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
130{
131 char *buff;
132 struct lec_priv *priv;
133
134 /*
135 * Check if this is a BPDU. If so, ask zeppelin to send
136 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
137 * as the Config BPDU has
138 */
139 buff = skb->data + skb->dev->hard_header_len;
140 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
141 struct sock *sk;
142 struct sk_buff *skb2;
143 struct atmlec_msg *mesg;
144
145 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
146 if (skb2 == NULL)
147 return;
148 skb2->len = sizeof(struct atmlec_msg);
149 mesg = (struct atmlec_msg *)skb2->data;
150 mesg->type = l_topology_change;
151 buff += 4;
152 mesg->content.normal.flag = *buff & 0x01;
153 /* 0x01 is topology change */
154
155 priv = netdev_priv(dev);
156 atm_force_charge(priv->lecd, skb2->truesize);
157 sk = sk_atm(priv->lecd);
158 skb_queue_tail(&sk->sk_receive_queue, skb2);
159 sk->sk_data_ready(sk);
160 }
161}
162#endif /* IS_ENABLED(CONFIG_BRIDGE) */
163
164/*
165 * Open/initialize the netdevice. This is called (in the current kernel)
166 * sometime after booting when the 'ifconfig' program is run.
167 *
168 * This routine should set everything up anew at each open, even
169 * registers that "should" only need to be set once at boot, so that
170 * there is non-reboot way to recover if something goes wrong.
171 */
172
173static int lec_open(struct net_device *dev)
174{
175 netif_start_queue(dev);
176
177 return 0;
178}
179
180static void
181lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
182{
183 struct net_device *dev = skb->dev;
184
185 ATM_SKB(skb)->vcc = vcc;
186 atm_account_tx(vcc, skb);
187
188 if (vcc->send(vcc, skb) < 0) {
189 dev->stats.tx_dropped++;
190 return;
191 }
192
193 dev->stats.tx_packets++;
194 dev->stats.tx_bytes += skb->len;
195}
196
197static void lec_tx_timeout(struct net_device *dev, unsigned int txqueue)
198{
199 pr_info("%s\n", dev->name);
200 netif_trans_update(dev);
201 netif_wake_queue(dev);
202}
203
204static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
205 struct net_device *dev)
206{
207 struct sk_buff *skb2;
208 struct lec_priv *priv = netdev_priv(dev);
209 struct lecdatahdr_8023 *lec_h;
210 struct atm_vcc *vcc;
211 struct lec_arp_table *entry;
212 unsigned char *dst;
213 int min_frame_size;
214 int is_rdesc;
215
216 pr_debug("called\n");
217 if (!priv->lecd) {
218 pr_info("%s:No lecd attached\n", dev->name);
219 dev->stats.tx_errors++;
220 netif_stop_queue(dev);
221 kfree_skb(skb);
222 return NETDEV_TX_OK;
223 }
224
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 IS_ENABLED(CONFIG_BRIDGE)
229 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
230 lec_handle_bridge(skb, dev);
231#endif
232
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)) {
238 kfree_skb(skb);
239 return NETDEV_TX_OK;
240 }
241 consume_skb(skb);
242 skb = skb2;
243 }
244 skb_push(skb, 2);
245
246 /* Put le header to place */
247 lec_h = (struct lecdatahdr_8023 *)skb->data;
248 lec_h->le_header = htons(priv->lecid);
249
250#if DUMP_PACKETS >= 2
251#define MAX_DUMP_SKB 99
252#elif DUMP_PACKETS >= 1
253#define MAX_DUMP_SKB 30
254#endif
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 */
261
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,
268 GFP_ATOMIC);
269 dev_kfree_skb(skb);
270 if (skb2 == NULL) {
271 dev->stats.tx_dropped++;
272 return NETDEV_TX_OK;
273 }
274 skb = skb2;
275 }
276 skb_put(skb, min_frame_size - skb->len);
277 }
278
279 /* Send to right vcc */
280 is_rdesc = 0;
281 dst = lec_h->h_dest;
282 entry = NULL;
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);
291 } else {
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++;
295 dev_kfree_skb(skb);
296 }
297 goto out;
298 }
299#if DUMP_PACKETS > 0
300 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
301 dev->name, vcc->vpi, vcc->vci);
302#endif /* DUMP_PACKETS > 0 */
303
304 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
305 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
306 lec_send(vcc, skb2);
307 }
308
309 lec_send(vcc, skb);
310
311 if (!atm_may_send(vcc, 0)) {
312 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
313
314 vpriv->xoff = 1;
315 netif_stop_queue(dev);
316
317 /*
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.
321 */
322
323 if (atm_may_send(vcc, 0))
324 netif_wake_queue(dev);
325 }
326
327out:
328 if (entry)
329 lec_arp_put(entry);
330 netif_trans_update(dev);
331 return NETDEV_TX_OK;
332}
333
334/* The inverse routine to net_open(). */
335static int lec_close(struct net_device *dev)
336{
337 netif_stop_queue(dev);
338 return 0;
339}
340
341static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
342{
343 unsigned long flags;
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;
348 int i;
349 char *tmp; /* FIXME */
350
351 WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
352 mesg = (struct atmlec_msg *)skb->data;
353 tmp = 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) {
357 case l_set_mac_addr:
358 for (i = 0; i < 6; i++)
359 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
360 break;
361 case l_del_mac_addr:
362 for (i = 0; i < 6; i++)
363 dev->dev_addr[i] = 0;
364 break;
365 case l_addr_delete:
366 lec_addr_delete(priv, mesg->content.normal.atm_addr,
367 mesg->content.normal.flag);
368 break;
369 case l_topology_change:
370 priv->topology_change = mesg->content.normal.flag;
371 break;
372 case l_flush_complete:
373 lec_flush_complete(priv, mesg->content.normal.flag);
374 break;
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);
380
381 if (mesg->content.normal.no_source_le_narp)
382 break;
383 fallthrough;
384 case l_arp_update:
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",
392 mesg->sizeoftlvs);
393 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
394 tmp, mesg->sizeoftlvs);
395 }
396 break;
397 case l_config:
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;
412 /* LANE2 */
413 priv->lane2_ops = NULL;
414 if (priv->lane_version > 1)
415 priv->lane2_ops = &lane2_ops;
416 rtnl_lock();
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);
420 rtnl_unlock();
421 priv->is_proxy = mesg->content.config.is_proxy;
422 break;
423 case l_flush_tran_id:
424 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
425 mesg->content.normal.flag);
426 break;
427 case l_set_lecid:
428 priv->lecid =
429 (unsigned short)(0xffff & mesg->content.normal.flag);
430 break;
431 case l_should_bridge:
432#if IS_ENABLED(CONFIG_BRIDGE)
433 {
434 pr_debug("%s: bridge zeppelin asks about %pM\n",
435 dev->name, mesg->content.proxy.mac_addr);
436
437 if (br_fdb_test_addr_hook == NULL)
438 break;
439
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;
443 struct sock *sk;
444
445 pr_debug("%s: entry found, responding to zeppelin\n",
446 dev->name);
447 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
448 if (skb2 == NULL)
449 break;
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);
456 }
457 }
458#endif /* IS_ENABLED(CONFIG_BRIDGE) */
459 break;
460 default:
461 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
462 dev_kfree_skb(skb);
463 return -EINVAL;
464 }
465 dev_kfree_skb(skb);
466 return 0;
467}
468
469static void lec_atm_close(struct atm_vcc *vcc)
470{
471 struct sk_buff *skb;
472 struct net_device *dev = (struct net_device *)vcc->proto_data;
473 struct lec_priv *priv = netdev_priv(dev);
474
475 priv->lecd = NULL;
476 /* Do something needful? */
477
478 netif_stop_queue(dev);
479 lec_arp_destroy(priv);
480
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);
485 dev_kfree_skb(skb);
486 }
487
488 pr_info("%s: Shut down!\n", dev->name);
489 module_put(THIS_MODULE);
490}
491
492static const struct atmdev_ops lecdev_ops = {
493 .close = lec_atm_close,
494 .send = lec_atm_send
495};
496
497static struct atm_dev lecatm_dev = {
498 .ops = &lecdev_ops,
499 .type = "lec",
500 .number = 999, /* dummy device number */
501 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
502};
503
504/*
505 * LANE2: new argument struct sk_buff *data contains
506 * the LE_ARP based TLVs introduced in the LANE2 spec
507 */
508static int
509send_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)
512{
513 struct sock *sk;
514 struct sk_buff *skb;
515 struct atmlec_msg *mesg;
516
517 if (!priv || !priv->lecd)
518 return -1;
519 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
520 if (!skb)
521 return -1;
522 skb->len = sizeof(struct atmlec_msg);
523 mesg = (struct atmlec_msg *)skb->data;
524 memset(mesg, 0, sizeof(struct atmlec_msg));
525 mesg->type = type;
526 if (data != NULL)
527 mesg->sizeoftlvs = data->len;
528 if (mac_addr)
529 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
530 else
531 mesg->content.normal.targetless_le_arp = 1;
532 if (atm_addr)
533 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
534
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);
539
540 if (data != NULL) {
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);
545 }
546
547 return 0;
548}
549
550static void lec_set_multicast_list(struct net_device *dev)
551{
552 /*
553 * by default, all multicast frames arrive over the bus.
554 * eventually support selective multicast service
555 */
556}
557
558static const struct net_device_ops lec_netdev_ops = {
559 .ndo_open = lec_open,
560 .ndo_stop = lec_close,
561 .ndo_start_xmit = lec_start_xmit,
562 .ndo_tx_timeout = lec_tx_timeout,
563 .ndo_set_rx_mode = lec_set_multicast_list,
564};
565
566static const unsigned char lec_ctrl_magic[] = {
567 0xff,
568 0x00,
569 0x01,
570 0x01
571};
572
573#define LEC_DATA_DIRECT_8023 2
574#define LEC_DATA_DIRECT_8025 3
575
576static int lec_is_data_direct(struct atm_vcc *vcc)
577{
578 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
579 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
580}
581
582static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
583{
584 unsigned long flags;
585 struct net_device *dev = (struct net_device *)vcc->proto_data;
586 struct lec_priv *priv = netdev_priv(dev);
587
588#if DUMP_PACKETS > 0
589 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
590 dev->name, vcc->vpi, vcc->vci);
591#endif
592 if (!skb) {
593 pr_debug("%s: null skb\n", dev->name);
594 lec_vcc_close(priv, vcc);
595 return;
596 }
597#if DUMP_PACKETS >= 2
598#define MAX_SKB_DUMP 99
599#elif DUMP_PACKETS >= 1
600#define MAX_SKB_DUMP 30
601#endif
602#if DUMP_PACKETS > 0
603 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
604 dev->name, skb->len, priv->lecid);
605 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
606 skb->data, min(MAX_SKB_DUMP, skb->len), true);
607#endif /* DUMP_PACKETS > 0 */
608 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
609 /* Control frame, to daemon */
610 struct sock *sk = sk_atm(vcc);
611
612 pr_debug("%s: To daemon\n", dev->name);
613 skb_queue_tail(&sk->sk_receive_queue, skb);
614 sk->sk_data_ready(sk);
615 } else { /* Data frame, queue to protocol handlers */
616 struct lec_arp_table *entry;
617 unsigned char *src, *dst;
618
619 atm_return(vcc, skb->truesize);
620 if (*(__be16 *) skb->data == htons(priv->lecid) ||
621 !priv->lecd || !(dev->flags & IFF_UP)) {
622 /*
623 * Probably looping back, or if lecd is missing,
624 * lecd has gone down
625 */
626 pr_debug("Ignoring frame...\n");
627 dev_kfree_skb(skb);
628 return;
629 }
630 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
631
632 /*
633 * If this is a Data Direct VCC, and the VCC does not match
634 * the LE_ARP cache entry, delete the LE_ARP cache entry.
635 */
636 spin_lock_irqsave(&priv->lec_arp_lock, flags);
637 if (lec_is_data_direct(vcc)) {
638 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
639 entry = lec_arp_find(priv, src);
640 if (entry && entry->vcc != vcc) {
641 lec_arp_remove(priv, entry);
642 lec_arp_put(entry);
643 }
644 }
645 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
646
647 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
648 !priv->is_proxy && /* Proxy wants all the packets */
649 memcmp(dst, dev->dev_addr, dev->addr_len)) {
650 dev_kfree_skb(skb);
651 return;
652 }
653 if (!hlist_empty(&priv->lec_arp_empty_ones))
654 lec_arp_check_empties(priv, vcc, skb);
655 skb_pull(skb, 2); /* skip lec_id */
656 skb->protocol = eth_type_trans(skb, dev);
657 dev->stats.rx_packets++;
658 dev->stats.rx_bytes += skb->len;
659 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
660 netif_rx(skb);
661 }
662}
663
664static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
665{
666 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
667 struct net_device *dev = skb->dev;
668
669 if (vpriv == NULL) {
670 pr_info("vpriv = NULL!?!?!?\n");
671 return;
672 }
673
674 vpriv->old_pop(vcc, skb);
675
676 if (vpriv->xoff && atm_may_send(vcc, 0)) {
677 vpriv->xoff = 0;
678 if (netif_running(dev) && netif_queue_stopped(dev))
679 netif_wake_queue(dev);
680 }
681}
682
683static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
684{
685 struct lec_vcc_priv *vpriv;
686 int bytes_left;
687 struct atmlec_ioc ioc_data;
688
689 /* Lecd must be up in this case */
690 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
691 if (bytes_left != 0)
692 pr_info("copy from user failed for %d bytes\n", bytes_left);
693 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
694 return -EINVAL;
695 ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF);
696 if (!dev_lec[ioc_data.dev_num])
697 return -EINVAL;
698 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
699 if (!vpriv)
700 return -ENOMEM;
701 vpriv->xoff = 0;
702 vpriv->old_pop = vcc->pop;
703 vcc->user_back = vpriv;
704 vcc->pop = lec_pop;
705 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
706 &ioc_data, vcc, vcc->push);
707 vcc->proto_data = dev_lec[ioc_data.dev_num];
708 vcc->push = lec_push;
709 return 0;
710}
711
712static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
713{
714 if (arg < 0 || arg >= MAX_LEC_ITF)
715 return -EINVAL;
716 arg = array_index_nospec(arg, MAX_LEC_ITF);
717 if (!dev_lec[arg])
718 return -EINVAL;
719 vcc->proto_data = dev_lec[arg];
720 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
721}
722
723/* Initialize device. */
724static int lecd_attach(struct atm_vcc *vcc, int arg)
725{
726 int i;
727 struct lec_priv *priv;
728
729 if (arg < 0)
730 arg = 0;
731 if (arg >= MAX_LEC_ITF)
732 return -EINVAL;
733 i = array_index_nospec(arg, MAX_LEC_ITF);
734 if (!dev_lec[i]) {
735 int size;
736
737 size = sizeof(struct lec_priv);
738 dev_lec[i] = alloc_etherdev(size);
739 if (!dev_lec[i])
740 return -ENOMEM;
741 dev_lec[i]->netdev_ops = &lec_netdev_ops;
742 dev_lec[i]->max_mtu = 18190;
743 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
744 if (register_netdev(dev_lec[i])) {
745 free_netdev(dev_lec[i]);
746 return -EINVAL;
747 }
748
749 priv = netdev_priv(dev_lec[i]);
750 } else {
751 priv = netdev_priv(dev_lec[i]);
752 if (priv->lecd)
753 return -EADDRINUSE;
754 }
755 lec_arp_init(priv);
756 priv->itfnum = i; /* LANE2 addition */
757 priv->lecd = vcc;
758 vcc->dev = &lecatm_dev;
759 vcc_insert_socket(sk_atm(vcc));
760
761 vcc->proto_data = dev_lec[i];
762 set_bit(ATM_VF_META, &vcc->flags);
763 set_bit(ATM_VF_READY, &vcc->flags);
764
765 /* Set default values to these variables */
766 priv->maximum_unknown_frame_count = 1;
767 priv->max_unknown_frame_time = (1 * HZ);
768 priv->vcc_timeout_period = (1200 * HZ);
769 priv->max_retry_count = 1;
770 priv->aging_time = (300 * HZ);
771 priv->forward_delay_time = (15 * HZ);
772 priv->topology_change = 0;
773 priv->arp_response_time = (1 * HZ);
774 priv->flush_timeout = (4 * HZ);
775 priv->path_switching_delay = (6 * HZ);
776
777 if (dev_lec[i]->flags & IFF_UP)
778 netif_start_queue(dev_lec[i]);
779 __module_get(THIS_MODULE);
780 return i;
781}
782
783#ifdef CONFIG_PROC_FS
784static const char *lec_arp_get_status_string(unsigned char status)
785{
786 static const char *const lec_arp_status_string[] = {
787 "ESI_UNKNOWN ",
788 "ESI_ARP_PENDING ",
789 "ESI_VC_PENDING ",
790 "<Undefined> ",
791 "ESI_FLUSH_PENDING ",
792 "ESI_FORWARD_DIRECT"
793 };
794
795 if (status > ESI_FORWARD_DIRECT)
796 status = 3; /* ESI_UNDEFINED */
797 return lec_arp_status_string[status];
798}
799
800static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
801{
802 seq_printf(seq, "%pM ", entry->mac_addr);
803 seq_printf(seq, "%*phN ", ATM_ESA_LEN, entry->atm_addr);
804 seq_printf(seq, "%s %4.4x", lec_arp_get_status_string(entry->status),
805 entry->flags & 0xffff);
806 if (entry->vcc)
807 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
808 else
809 seq_printf(seq, " ");
810 if (entry->recv_vcc) {
811 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
812 entry->recv_vcc->vci);
813 }
814 seq_putc(seq, '\n');
815}
816
817struct lec_state {
818 unsigned long flags;
819 struct lec_priv *locked;
820 struct hlist_node *node;
821 struct net_device *dev;
822 int itf;
823 int arp_table;
824 int misc_table;
825};
826
827static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
828 loff_t *l)
829{
830 struct hlist_node *e = state->node;
831
832 if (!e)
833 e = tbl->first;
834 if (e == SEQ_START_TOKEN) {
835 e = tbl->first;
836 --*l;
837 }
838
839 for (; e; e = e->next) {
840 if (--*l < 0)
841 break;
842 }
843 state->node = e;
844
845 return (*l < 0) ? state : NULL;
846}
847
848static void *lec_arp_walk(struct lec_state *state, loff_t *l,
849 struct lec_priv *priv)
850{
851 void *v = NULL;
852 int p;
853
854 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
855 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
856 if (v)
857 break;
858 }
859 state->arp_table = p;
860 return v;
861}
862
863static void *lec_misc_walk(struct lec_state *state, loff_t *l,
864 struct lec_priv *priv)
865{
866 struct hlist_head *lec_misc_tables[] = {
867 &priv->lec_arp_empty_ones,
868 &priv->lec_no_forward,
869 &priv->mcast_fwds
870 };
871 void *v = NULL;
872 int q;
873
874 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
875 v = lec_tbl_walk(state, lec_misc_tables[q], l);
876 if (v)
877 break;
878 }
879 state->misc_table = q;
880 return v;
881}
882
883static void *lec_priv_walk(struct lec_state *state, loff_t *l,
884 struct lec_priv *priv)
885{
886 if (!state->locked) {
887 state->locked = priv;
888 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
889 }
890 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
891 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
892 state->locked = NULL;
893 /* Partial state reset for the next time we get called */
894 state->arp_table = state->misc_table = 0;
895 }
896 return state->locked;
897}
898
899static void *lec_itf_walk(struct lec_state *state, loff_t *l)
900{
901 struct net_device *dev;
902 void *v;
903
904 dev = state->dev ? state->dev : dev_lec[state->itf];
905 v = (dev && netdev_priv(dev)) ?
906 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
907 if (!v && dev) {
908 dev_put(dev);
909 /* Partial state reset for the next time we get called */
910 dev = NULL;
911 }
912 state->dev = dev;
913 return v;
914}
915
916static void *lec_get_idx(struct lec_state *state, loff_t l)
917{
918 void *v = NULL;
919
920 for (; state->itf < MAX_LEC_ITF; state->itf++) {
921 v = lec_itf_walk(state, &l);
922 if (v)
923 break;
924 }
925 return v;
926}
927
928static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
929{
930 struct lec_state *state = seq->private;
931
932 state->itf = 0;
933 state->dev = NULL;
934 state->locked = NULL;
935 state->arp_table = 0;
936 state->misc_table = 0;
937 state->node = SEQ_START_TOKEN;
938
939 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
940}
941
942static void lec_seq_stop(struct seq_file *seq, void *v)
943{
944 struct lec_state *state = seq->private;
945
946 if (state->dev) {
947 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
948 state->flags);
949 dev_put(state->dev);
950 }
951}
952
953static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
954{
955 struct lec_state *state = seq->private;
956
957 v = lec_get_idx(state, 1);
958 *pos += !!PTR_ERR(v);
959 return v;
960}
961
962static int lec_seq_show(struct seq_file *seq, void *v)
963{
964 static const char lec_banner[] =
965 "Itf MAC ATM destination"
966 " Status Flags "
967 "VPI/VCI Recv VPI/VCI\n";
968
969 if (v == SEQ_START_TOKEN)
970 seq_puts(seq, lec_banner);
971 else {
972 struct lec_state *state = seq->private;
973 struct net_device *dev = state->dev;
974 struct lec_arp_table *entry = hlist_entry(state->node,
975 struct lec_arp_table,
976 next);
977
978 seq_printf(seq, "%s ", dev->name);
979 lec_info(seq, entry);
980 }
981 return 0;
982}
983
984static const struct seq_operations lec_seq_ops = {
985 .start = lec_seq_start,
986 .next = lec_seq_next,
987 .stop = lec_seq_stop,
988 .show = lec_seq_show,
989};
990#endif
991
992static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
993{
994 struct atm_vcc *vcc = ATM_SD(sock);
995 int err = 0;
996
997 switch (cmd) {
998 case ATMLEC_CTRL:
999 case ATMLEC_MCAST:
1000 case ATMLEC_DATA:
1001 if (!capable(CAP_NET_ADMIN))
1002 return -EPERM;
1003 break;
1004 default:
1005 return -ENOIOCTLCMD;
1006 }
1007
1008 switch (cmd) {
1009 case ATMLEC_CTRL:
1010 err = lecd_attach(vcc, (int)arg);
1011 if (err >= 0)
1012 sock->state = SS_CONNECTED;
1013 break;
1014 case ATMLEC_MCAST:
1015 err = lec_mcast_attach(vcc, (int)arg);
1016 break;
1017 case ATMLEC_DATA:
1018 err = lec_vcc_attach(vcc, (void __user *)arg);
1019 break;
1020 }
1021
1022 return err;
1023}
1024
1025static struct atm_ioctl lane_ioctl_ops = {
1026 .owner = THIS_MODULE,
1027 .ioctl = lane_ioctl,
1028};
1029
1030static int __init lane_module_init(void)
1031{
1032#ifdef CONFIG_PROC_FS
1033 struct proc_dir_entry *p;
1034
1035 p = proc_create_seq_private("lec", 0444, atm_proc_root, &lec_seq_ops,
1036 sizeof(struct lec_state), NULL);
1037 if (!p) {
1038 pr_err("Unable to initialize /proc/net/atm/lec\n");
1039 return -ENOMEM;
1040 }
1041#endif
1042
1043 register_atm_ioctl(&lane_ioctl_ops);
1044 pr_info("lec.c: initialized\n");
1045 return 0;
1046}
1047
1048static void __exit lane_module_cleanup(void)
1049{
1050 int i;
1051
1052#ifdef CONFIG_PROC_FS
1053 remove_proc_entry("lec", atm_proc_root);
1054#endif
1055
1056 deregister_atm_ioctl(&lane_ioctl_ops);
1057
1058 for (i = 0; i < MAX_LEC_ITF; i++) {
1059 if (dev_lec[i] != NULL) {
1060 unregister_netdev(dev_lec[i]);
1061 free_netdev(dev_lec[i]);
1062 dev_lec[i] = NULL;
1063 }
1064 }
1065}
1066
1067module_init(lane_module_init);
1068module_exit(lane_module_cleanup);
1069
1070/*
1071 * LANE2: 3.1.3, LE_RESOLVE.request
1072 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1073 * If sizeoftlvs == NULL the default TLVs associated with with this
1074 * lec will be used.
1075 * If dst_mac == NULL, targetless LE_ARP will be sent
1076 */
1077static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1078 u8 **tlvs, u32 *sizeoftlvs)
1079{
1080 unsigned long flags;
1081 struct lec_priv *priv = netdev_priv(dev);
1082 struct lec_arp_table *table;
1083 struct sk_buff *skb;
1084 int retval;
1085
1086 if (force == 0) {
1087 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1088 table = lec_arp_find(priv, dst_mac);
1089 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1090 if (table == NULL)
1091 return -1;
1092
1093 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1094 if (*tlvs == NULL)
1095 return -1;
1096
1097 *sizeoftlvs = table->sizeoftlvs;
1098
1099 return 0;
1100 }
1101
1102 if (sizeoftlvs == NULL)
1103 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1104
1105 else {
1106 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1107 if (skb == NULL)
1108 return -1;
1109 skb->len = *sizeoftlvs;
1110 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1111 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1112 }
1113 return retval;
1114}
1115
1116/*
1117 * LANE2: 3.1.4, LE_ASSOCIATE.request
1118 * Associate the *tlvs with the *lan_dst address.
1119 * Will overwrite any previous association
1120 * Returns 1 for success, 0 for failure (out of memory)
1121 *
1122 */
1123static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1124 const u8 *tlvs, u32 sizeoftlvs)
1125{
1126 int retval;
1127 struct sk_buff *skb;
1128 struct lec_priv *priv = netdev_priv(dev);
1129
1130 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1131 return 0; /* not our mac address */
1132
1133 kfree(priv->tlvs); /* NULL if there was no previous association */
1134
1135 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1136 if (priv->tlvs == NULL)
1137 return 0;
1138 priv->sizeoftlvs = sizeoftlvs;
1139
1140 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1141 if (skb == NULL)
1142 return 0;
1143 skb->len = sizeoftlvs;
1144 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1145 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1146 if (retval != 0)
1147 pr_info("lec.c: lane2_associate_req() failed\n");
1148 /*
1149 * If the previous association has changed we must
1150 * somehow notify other LANE entities about the change
1151 */
1152 return 1;
1153}
1154
1155/*
1156 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1157 *
1158 */
1159static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1160 const u8 *tlvs, u32 sizeoftlvs)
1161{
1162#if 0
1163 int i = 0;
1164#endif
1165 struct lec_priv *priv = netdev_priv(dev);
1166#if 0 /*
1167 * Why have the TLVs in LE_ARP entries
1168 * since we do not use them? When you
1169 * uncomment this code, make sure the
1170 * TLVs get freed when entry is killed
1171 */
1172 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1173
1174 if (entry == NULL)
1175 return; /* should not happen */
1176
1177 kfree(entry->tlvs);
1178
1179 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1180 if (entry->tlvs == NULL)
1181 return;
1182 entry->sizeoftlvs = sizeoftlvs;
1183#endif
1184#if 0
1185 pr_info("\n");
1186 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1187 while (i < sizeoftlvs)
1188 pr_cont("%02x ", tlvs[i++]);
1189
1190 pr_cont("\n");
1191#endif
1192
1193 /* tell MPOA about the TLVs we saw */
1194 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1195 priv->lane2_ops->associate_indicator(dev, mac_addr,
1196 tlvs, sizeoftlvs);
1197 }
1198}
1199
1200/*
1201 * Here starts what used to lec_arpc.c
1202 *
1203 * lec_arpc.c was added here when making
1204 * lane client modular. October 1997
1205 */
1206
1207#include <linux/types.h>
1208#include <linux/timer.h>
1209#include <linux/param.h>
1210#include <linux/atomic.h>
1211#include <linux/inetdevice.h>
1212#include <net/route.h>
1213
1214#if 0
1215#define pr_debug(format, args...)
1216/*
1217 #define pr_debug printk
1218*/
1219#endif
1220#define DEBUG_ARP_TABLE 0
1221
1222#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1223
1224static void lec_arp_check_expire(struct work_struct *work);
1225static void lec_arp_expire_arp(struct timer_list *t);
1226
1227/*
1228 * Arp table funcs
1229 */
1230
1231#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1232
1233/*
1234 * Initialization of arp-cache
1235 */
1236static void lec_arp_init(struct lec_priv *priv)
1237{
1238 unsigned short i;
1239
1240 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1241 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1242 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1243 INIT_HLIST_HEAD(&priv->lec_no_forward);
1244 INIT_HLIST_HEAD(&priv->mcast_fwds);
1245 spin_lock_init(&priv->lec_arp_lock);
1246 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1247 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1248}
1249
1250static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1251{
1252 if (entry->vcc) {
1253 struct atm_vcc *vcc = entry->vcc;
1254 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1255 struct net_device *dev = (struct net_device *)vcc->proto_data;
1256
1257 vcc->pop = vpriv->old_pop;
1258 if (vpriv->xoff)
1259 netif_wake_queue(dev);
1260 kfree(vpriv);
1261 vcc->user_back = NULL;
1262 vcc->push = entry->old_push;
1263 vcc_release_async(vcc, -EPIPE);
1264 entry->vcc = NULL;
1265 }
1266 if (entry->recv_vcc) {
1267 struct atm_vcc *vcc = entry->recv_vcc;
1268 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1269
1270 kfree(vpriv);
1271 vcc->user_back = NULL;
1272
1273 entry->recv_vcc->push = entry->old_recv_push;
1274 vcc_release_async(entry->recv_vcc, -EPIPE);
1275 entry->recv_vcc = NULL;
1276 }
1277}
1278
1279/*
1280 * Insert entry to lec_arp_table
1281 * LANE2: Add to the end of the list to satisfy 8.1.13
1282 */
1283static inline void
1284lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1285{
1286 struct hlist_head *tmp;
1287
1288 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1289 hlist_add_head(&entry->next, tmp);
1290
1291 pr_debug("Added entry:%pM\n", entry->mac_addr);
1292}
1293
1294/*
1295 * Remove entry from lec_arp_table
1296 */
1297static int
1298lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1299{
1300 struct lec_arp_table *entry;
1301 int i, remove_vcc = 1;
1302
1303 if (!to_remove)
1304 return -1;
1305
1306 hlist_del(&to_remove->next);
1307 del_timer(&to_remove->timer);
1308
1309 /*
1310 * If this is the only MAC connected to this VCC,
1311 * also tear down the VCC
1312 */
1313 if (to_remove->status >= ESI_FLUSH_PENDING) {
1314 /*
1315 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1316 */
1317 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1318 hlist_for_each_entry(entry,
1319 &priv->lec_arp_tables[i], next) {
1320 if (memcmp(to_remove->atm_addr,
1321 entry->atm_addr, ATM_ESA_LEN) == 0) {
1322 remove_vcc = 0;
1323 break;
1324 }
1325 }
1326 }
1327 if (remove_vcc)
1328 lec_arp_clear_vccs(to_remove);
1329 }
1330 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1331
1332 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1333 return 0;
1334}
1335
1336#if DEBUG_ARP_TABLE
1337static const char *get_status_string(unsigned char st)
1338{
1339 switch (st) {
1340 case ESI_UNKNOWN:
1341 return "ESI_UNKNOWN";
1342 case ESI_ARP_PENDING:
1343 return "ESI_ARP_PENDING";
1344 case ESI_VC_PENDING:
1345 return "ESI_VC_PENDING";
1346 case ESI_FLUSH_PENDING:
1347 return "ESI_FLUSH_PENDING";
1348 case ESI_FORWARD_DIRECT:
1349 return "ESI_FORWARD_DIRECT";
1350 }
1351 return "<UNKNOWN>";
1352}
1353
1354static void dump_arp_table(struct lec_priv *priv)
1355{
1356 struct lec_arp_table *rulla;
1357 char buf[256];
1358 int i, offset;
1359
1360 pr_info("Dump %p:\n", priv);
1361 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1362 hlist_for_each_entry(rulla,
1363 &priv->lec_arp_tables[i], next) {
1364 offset = 0;
1365 offset += sprintf(buf, "%d: %p\n", i, rulla);
1366 offset += sprintf(buf + offset, "Mac: %pM ",
1367 rulla->mac_addr);
1368 offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
1369 rulla->atm_addr);
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->
1375 vpi : 0,
1376 rulla->recv_vcc ? rulla->recv_vcc->
1377 vci : 0, rulla->last_used,
1378 rulla->timestamp, rulla->no_tries);
1379 offset +=
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);
1385 }
1386 }
1387
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) {
1391 offset = 0;
1392 offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
1393 offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
1394 rulla->atm_addr);
1395 offset += sprintf(buf + offset,
1396 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1397 rulla->vcc ? rulla->vcc->vpi : 0,
1398 rulla->vcc ? rulla->vcc->vci : 0,
1399 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1400 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1401 rulla->last_used,
1402 rulla->timestamp, rulla->no_tries);
1403 offset += sprintf(buf + offset,
1404 "Flags:%x, Packets_flooded:%x, Status: %s ",
1405 rulla->flags, rulla->packets_flooded,
1406 get_status_string(rulla->status));
1407 pr_info("%s\n", buf);
1408 }
1409
1410 if (!hlist_empty(&priv->lec_arp_empty_ones))
1411 pr_info("Empty ones\n");
1412 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1413 offset = 0;
1414 offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
1415 offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
1416 rulla->atm_addr);
1417 offset += sprintf(buf + offset,
1418 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1419 rulla->vcc ? rulla->vcc->vpi : 0,
1420 rulla->vcc ? rulla->vcc->vci : 0,
1421 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1422 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1423 rulla->last_used,
1424 rulla->timestamp, rulla->no_tries);
1425 offset += sprintf(buf + offset,
1426 "Flags:%x, Packets_flooded:%x, Status: %s ",
1427 rulla->flags, rulla->packets_flooded,
1428 get_status_string(rulla->status));
1429 pr_info("%s", buf);
1430 }
1431
1432 if (!hlist_empty(&priv->mcast_fwds))
1433 pr_info("Multicast Forward VCCs\n");
1434 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1435 offset = 0;
1436 offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
1437 offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
1438 rulla->atm_addr);
1439 offset += sprintf(buf + offset,
1440 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1441 rulla->vcc ? rulla->vcc->vpi : 0,
1442 rulla->vcc ? rulla->vcc->vci : 0,
1443 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1444 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1445 rulla->last_used,
1446 rulla->timestamp, rulla->no_tries);
1447 offset += sprintf(buf + offset,
1448 "Flags:%x, Packets_flooded:%x, Status: %s ",
1449 rulla->flags, rulla->packets_flooded,
1450 get_status_string(rulla->status));
1451 pr_info("%s\n", buf);
1452 }
1453
1454}
1455#else
1456#define dump_arp_table(priv) do { } while (0)
1457#endif
1458
1459/*
1460 * Destruction of arp-cache
1461 */
1462static void lec_arp_destroy(struct lec_priv *priv)
1463{
1464 unsigned long flags;
1465 struct hlist_node *next;
1466 struct lec_arp_table *entry;
1467 int i;
1468
1469 cancel_delayed_work_sync(&priv->lec_arp_work);
1470
1471 /*
1472 * Remove all entries
1473 */
1474
1475 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1476 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1477 hlist_for_each_entry_safe(entry, next,
1478 &priv->lec_arp_tables[i], next) {
1479 lec_arp_remove(priv, entry);
1480 lec_arp_put(entry);
1481 }
1482 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1483 }
1484
1485 hlist_for_each_entry_safe(entry, next,
1486 &priv->lec_arp_empty_ones, next) {
1487 del_timer_sync(&entry->timer);
1488 lec_arp_clear_vccs(entry);
1489 hlist_del(&entry->next);
1490 lec_arp_put(entry);
1491 }
1492 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1493
1494 hlist_for_each_entry_safe(entry, next,
1495 &priv->lec_no_forward, next) {
1496 del_timer_sync(&entry->timer);
1497 lec_arp_clear_vccs(entry);
1498 hlist_del(&entry->next);
1499 lec_arp_put(entry);
1500 }
1501 INIT_HLIST_HEAD(&priv->lec_no_forward);
1502
1503 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1504 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1505 lec_arp_clear_vccs(entry);
1506 hlist_del(&entry->next);
1507 lec_arp_put(entry);
1508 }
1509 INIT_HLIST_HEAD(&priv->mcast_fwds);
1510 priv->mcast_vcc = NULL;
1511 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1512}
1513
1514/*
1515 * Find entry by mac_address
1516 */
1517static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1518 const unsigned char *mac_addr)
1519{
1520 struct hlist_head *head;
1521 struct lec_arp_table *entry;
1522
1523 pr_debug("%pM\n", mac_addr);
1524
1525 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1526 hlist_for_each_entry(entry, head, next) {
1527 if (ether_addr_equal(mac_addr, entry->mac_addr))
1528 return entry;
1529 }
1530 return NULL;
1531}
1532
1533static struct lec_arp_table *make_entry(struct lec_priv *priv,
1534 const unsigned char *mac_addr)
1535{
1536 struct lec_arp_table *to_return;
1537
1538 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1539 if (!to_return)
1540 return NULL;
1541 ether_addr_copy(to_return->mac_addr, mac_addr);
1542 INIT_HLIST_NODE(&to_return->next);
1543 timer_setup(&to_return->timer, lec_arp_expire_arp, 0);
1544 to_return->last_used = jiffies;
1545 to_return->priv = priv;
1546 skb_queue_head_init(&to_return->tx_wait);
1547 refcount_set(&to_return->usage, 1);
1548 return to_return;
1549}
1550
1551/* Arp sent timer expired */
1552static void lec_arp_expire_arp(struct timer_list *t)
1553{
1554 struct lec_arp_table *entry;
1555
1556 entry = from_timer(entry, t, timer);
1557
1558 pr_debug("\n");
1559 if (entry->status == ESI_ARP_PENDING) {
1560 if (entry->no_tries <= entry->priv->max_retry_count) {
1561 if (entry->is_rdesc)
1562 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1563 entry->mac_addr, NULL, NULL);
1564 else
1565 send_to_lecd(entry->priv, l_arp_xmt,
1566 entry->mac_addr, NULL, NULL);
1567 entry->no_tries++;
1568 }
1569 mod_timer(&entry->timer, jiffies + (1 * HZ));
1570 }
1571}
1572
1573/* Unknown/unused vcc expire, remove associated entry */
1574static void lec_arp_expire_vcc(struct timer_list *t)
1575{
1576 unsigned long flags;
1577 struct lec_arp_table *to_remove = from_timer(to_remove, t, timer);
1578 struct lec_priv *priv = to_remove->priv;
1579
1580 del_timer(&to_remove->timer);
1581
1582 pr_debug("%p %p: vpi:%d vci:%d\n",
1583 to_remove, priv,
1584 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1585 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1586
1587 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1588 hlist_del(&to_remove->next);
1589 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1590
1591 lec_arp_clear_vccs(to_remove);
1592 lec_arp_put(to_remove);
1593}
1594
1595static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1596 unsigned long now,
1597 struct lec_priv *priv)
1598{
1599 unsigned long time_to_check;
1600
1601 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1602 time_to_check = priv->forward_delay_time;
1603 else
1604 time_to_check = priv->aging_time;
1605
1606 pr_debug("About to expire: %lx - %lx > %lx\n",
1607 now, entry->last_used, time_to_check);
1608 if (time_after(now, entry->last_used + time_to_check) &&
1609 !(entry->flags & LEC_PERMANENT_FLAG) &&
1610 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1611 /* Remove entry */
1612 pr_debug("Entry timed out\n");
1613 lec_arp_remove(priv, entry);
1614 lec_arp_put(entry);
1615 } else {
1616 /* Something else */
1617 if ((entry->status == ESI_VC_PENDING ||
1618 entry->status == ESI_ARP_PENDING) &&
1619 time_after_eq(now, entry->timestamp +
1620 priv->max_unknown_frame_time)) {
1621 entry->timestamp = jiffies;
1622 entry->packets_flooded = 0;
1623 if (entry->status == ESI_VC_PENDING)
1624 send_to_lecd(priv, l_svc_setup,
1625 entry->mac_addr,
1626 entry->atm_addr,
1627 NULL);
1628 }
1629 if (entry->status == ESI_FLUSH_PENDING &&
1630 time_after_eq(now, entry->timestamp +
1631 priv->path_switching_delay)) {
1632 lec_arp_hold(entry);
1633 return true;
1634 }
1635 }
1636
1637 return false;
1638}
1639/*
1640 * Expire entries.
1641 * 1. Re-set timer
1642 * 2. For each entry, delete entries that have aged past the age limit.
1643 * 3. For each entry, depending on the status of the entry, perform
1644 * the following maintenance.
1645 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1646 * tick_count is above the max_unknown_frame_time, clear
1647 * the tick_count to zero and clear the packets_flooded counter
1648 * to zero. This supports the packet rate limit per address
1649 * while flooding unknowns.
1650 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1651 * than or equal to the path_switching_delay, change the status
1652 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1653 * regardless of the progress of the flush protocol.
1654 */
1655static void lec_arp_check_expire(struct work_struct *work)
1656{
1657 unsigned long flags;
1658 struct lec_priv *priv =
1659 container_of(work, struct lec_priv, lec_arp_work.work);
1660 struct hlist_node *next;
1661 struct lec_arp_table *entry;
1662 unsigned long now;
1663 int i;
1664
1665 pr_debug("%p\n", priv);
1666 now = jiffies;
1667restart:
1668 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1669 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1670 hlist_for_each_entry_safe(entry, next,
1671 &priv->lec_arp_tables[i], next) {
1672 if (__lec_arp_check_expire(entry, now, priv)) {
1673 struct sk_buff *skb;
1674 struct atm_vcc *vcc = entry->vcc;
1675
1676 spin_unlock_irqrestore(&priv->lec_arp_lock,
1677 flags);
1678 while ((skb = skb_dequeue(&entry->tx_wait)))
1679 lec_send(vcc, skb);
1680 entry->last_used = jiffies;
1681 entry->status = ESI_FORWARD_DIRECT;
1682 lec_arp_put(entry);
1683
1684 goto restart;
1685 }
1686 }
1687 }
1688 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1689
1690 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1691}
1692
1693/*
1694 * Try to find vcc where mac_address is attached.
1695 *
1696 */
1697static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1698 const unsigned char *mac_to_find,
1699 int is_rdesc,
1700 struct lec_arp_table **ret_entry)
1701{
1702 unsigned long flags;
1703 struct lec_arp_table *entry;
1704 struct atm_vcc *found;
1705
1706 if (mac_to_find[0] & 0x01) {
1707 switch (priv->lane_version) {
1708 case 1:
1709 return priv->mcast_vcc;
1710 case 2: /* LANE2 wants arp for multicast addresses */
1711 if (ether_addr_equal(mac_to_find, bus_mac))
1712 return priv->mcast_vcc;
1713 break;
1714 default:
1715 break;
1716 }
1717 }
1718
1719 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1720 entry = lec_arp_find(priv, mac_to_find);
1721
1722 if (entry) {
1723 if (entry->status == ESI_FORWARD_DIRECT) {
1724 /* Connection Ok */
1725 entry->last_used = jiffies;
1726 lec_arp_hold(entry);
1727 *ret_entry = entry;
1728 found = entry->vcc;
1729 goto out;
1730 }
1731 /*
1732 * If the LE_ARP cache entry is still pending, reset count to 0
1733 * so another LE_ARP request can be made for this frame.
1734 */
1735 if (entry->status == ESI_ARP_PENDING)
1736 entry->no_tries = 0;
1737 /*
1738 * Data direct VC not yet set up, check to see if the unknown
1739 * frame count is greater than the limit. If the limit has
1740 * not been reached, allow the caller to send packet to
1741 * BUS.
1742 */
1743 if (entry->status != ESI_FLUSH_PENDING &&
1744 entry->packets_flooded <
1745 priv->maximum_unknown_frame_count) {
1746 entry->packets_flooded++;
1747 pr_debug("Flooding..\n");
1748 found = priv->mcast_vcc;
1749 goto out;
1750 }
1751 /*
1752 * We got here because entry->status == ESI_FLUSH_PENDING
1753 * or BUS flood limit was reached for an entry which is
1754 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1755 */
1756 lec_arp_hold(entry);
1757 *ret_entry = entry;
1758 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1759 entry->vcc);
1760 found = NULL;
1761 } else {
1762 /* No matching entry was found */
1763 entry = make_entry(priv, mac_to_find);
1764 pr_debug("Making entry\n");
1765 if (!entry) {
1766 found = priv->mcast_vcc;
1767 goto out;
1768 }
1769 lec_arp_add(priv, entry);
1770 /* We want arp-request(s) to be sent */
1771 entry->packets_flooded = 1;
1772 entry->status = ESI_ARP_PENDING;
1773 entry->no_tries = 1;
1774 entry->last_used = entry->timestamp = jiffies;
1775 entry->is_rdesc = is_rdesc;
1776 if (entry->is_rdesc)
1777 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1778 NULL);
1779 else
1780 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1781 entry->timer.expires = jiffies + (1 * HZ);
1782 entry->timer.function = lec_arp_expire_arp;
1783 add_timer(&entry->timer);
1784 found = priv->mcast_vcc;
1785 }
1786
1787out:
1788 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1789 return found;
1790}
1791
1792static int
1793lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1794 unsigned long permanent)
1795{
1796 unsigned long flags;
1797 struct hlist_node *next;
1798 struct lec_arp_table *entry;
1799 int i;
1800
1801 pr_debug("\n");
1802 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1803 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1804 hlist_for_each_entry_safe(entry, next,
1805 &priv->lec_arp_tables[i], next) {
1806 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1807 (permanent ||
1808 !(entry->flags & LEC_PERMANENT_FLAG))) {
1809 lec_arp_remove(priv, entry);
1810 lec_arp_put(entry);
1811 }
1812 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1813 return 0;
1814 }
1815 }
1816 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1817 return -1;
1818}
1819
1820/*
1821 * Notifies: Response to arp_request (atm_addr != NULL)
1822 */
1823static void
1824lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1825 const unsigned char *atm_addr, unsigned long remoteflag,
1826 unsigned int targetless_le_arp)
1827{
1828 unsigned long flags;
1829 struct hlist_node *next;
1830 struct lec_arp_table *entry, *tmp;
1831 int i;
1832
1833 pr_debug("%smac:%pM\n",
1834 (targetless_le_arp) ? "targetless " : "", mac_addr);
1835
1836 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1837 entry = lec_arp_find(priv, mac_addr);
1838 if (entry == NULL && targetless_le_arp)
1839 goto out; /*
1840 * LANE2: ignore targetless LE_ARPs for which
1841 * we have no entry in the cache. 7.1.30
1842 */
1843 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1844 hlist_for_each_entry_safe(entry, next,
1845 &priv->lec_arp_empty_ones, next) {
1846 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1847 hlist_del(&entry->next);
1848 del_timer(&entry->timer);
1849 tmp = lec_arp_find(priv, mac_addr);
1850 if (tmp) {
1851 del_timer(&tmp->timer);
1852 tmp->status = ESI_FORWARD_DIRECT;
1853 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1854 tmp->vcc = entry->vcc;
1855 tmp->old_push = entry->old_push;
1856 tmp->last_used = jiffies;
1857 del_timer(&entry->timer);
1858 lec_arp_put(entry);
1859 entry = tmp;
1860 } else {
1861 entry->status = ESI_FORWARD_DIRECT;
1862 ether_addr_copy(entry->mac_addr,
1863 mac_addr);
1864 entry->last_used = jiffies;
1865 lec_arp_add(priv, entry);
1866 }
1867 if (remoteflag)
1868 entry->flags |= LEC_REMOTE_FLAG;
1869 else
1870 entry->flags &= ~LEC_REMOTE_FLAG;
1871 pr_debug("After update\n");
1872 dump_arp_table(priv);
1873 goto out;
1874 }
1875 }
1876 }
1877
1878 entry = lec_arp_find(priv, mac_addr);
1879 if (!entry) {
1880 entry = make_entry(priv, mac_addr);
1881 if (!entry)
1882 goto out;
1883 entry->status = ESI_UNKNOWN;
1884 lec_arp_add(priv, entry);
1885 /* Temporary, changes before end of function */
1886 }
1887 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1888 del_timer(&entry->timer);
1889 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1890 hlist_for_each_entry(tmp,
1891 &priv->lec_arp_tables[i], next) {
1892 if (entry != tmp &&
1893 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1894 /* Vcc to this host exists */
1895 if (tmp->status > ESI_VC_PENDING) {
1896 /*
1897 * ESI_FLUSH_PENDING,
1898 * ESI_FORWARD_DIRECT
1899 */
1900 entry->vcc = tmp->vcc;
1901 entry->old_push = tmp->old_push;
1902 }
1903 entry->status = tmp->status;
1904 break;
1905 }
1906 }
1907 }
1908 if (remoteflag)
1909 entry->flags |= LEC_REMOTE_FLAG;
1910 else
1911 entry->flags &= ~LEC_REMOTE_FLAG;
1912 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1913 entry->status = ESI_VC_PENDING;
1914 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1915 }
1916 pr_debug("After update2\n");
1917 dump_arp_table(priv);
1918out:
1919 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1920}
1921
1922/*
1923 * Notifies: Vcc setup ready
1924 */
1925static void
1926lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1927 struct atm_vcc *vcc,
1928 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1929{
1930 unsigned long flags;
1931 struct lec_arp_table *entry;
1932 int i, found_entry = 0;
1933
1934 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1935 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1936 if (ioc_data->receive == 2) {
1937 pr_debug("LEC_ARP: Attaching mcast forward\n");
1938#if 0
1939 entry = lec_arp_find(priv, bus_mac);
1940 if (!entry) {
1941 pr_info("LEC_ARP: Multicast entry not found!\n");
1942 goto out;
1943 }
1944 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1945 entry->recv_vcc = vcc;
1946 entry->old_recv_push = old_push;
1947#endif
1948 entry = make_entry(priv, bus_mac);
1949 if (entry == NULL)
1950 goto out;
1951 del_timer(&entry->timer);
1952 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1953 entry->recv_vcc = vcc;
1954 entry->old_recv_push = old_push;
1955 hlist_add_head(&entry->next, &priv->mcast_fwds);
1956 goto out;
1957 } else if (ioc_data->receive == 1) {
1958 /*
1959 * Vcc which we don't want to make default vcc,
1960 * attach it anyway.
1961 */
1962 pr_debug("LEC_ARP:Attaching data direct, not default: %*phN\n",
1963 ATM_ESA_LEN, ioc_data->atm_addr);
1964 entry = make_entry(priv, bus_mac);
1965 if (entry == NULL)
1966 goto out;
1967 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1968 eth_zero_addr(entry->mac_addr);
1969 entry->recv_vcc = vcc;
1970 entry->old_recv_push = old_push;
1971 entry->status = ESI_UNKNOWN;
1972 entry->timer.expires = jiffies + priv->vcc_timeout_period;
1973 entry->timer.function = lec_arp_expire_vcc;
1974 hlist_add_head(&entry->next, &priv->lec_no_forward);
1975 add_timer(&entry->timer);
1976 dump_arp_table(priv);
1977 goto out;
1978 }
1979 pr_debug("LEC_ARP:Attaching data direct, default: %*phN\n",
1980 ATM_ESA_LEN, ioc_data->atm_addr);
1981 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1982 hlist_for_each_entry(entry,
1983 &priv->lec_arp_tables[i], next) {
1984 if (memcmp
1985 (ioc_data->atm_addr, entry->atm_addr,
1986 ATM_ESA_LEN) == 0) {
1987 pr_debug("LEC_ARP: Attaching data direct\n");
1988 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
1989 entry->vcc ? entry->vcc->vci : 0,
1990 entry->recv_vcc ? entry->recv_vcc->
1991 vci : 0);
1992 found_entry = 1;
1993 del_timer(&entry->timer);
1994 entry->vcc = vcc;
1995 entry->old_push = old_push;
1996 if (entry->status == ESI_VC_PENDING) {
1997 if (priv->maximum_unknown_frame_count
1998 == 0)
1999 entry->status =
2000 ESI_FORWARD_DIRECT;
2001 else {
2002 entry->timestamp = jiffies;
2003 entry->status =
2004 ESI_FLUSH_PENDING;
2005#if 0
2006 send_to_lecd(priv, l_flush_xmt,
2007 NULL,
2008 entry->atm_addr,
2009 NULL);
2010#endif
2011 }
2012 } else {
2013 /*
2014 * They were forming a connection
2015 * to us, and we to them. Our
2016 * ATM address is numerically lower
2017 * than theirs, so we make connection
2018 * we formed into default VCC (8.1.11).
2019 * Connection they made gets torn
2020 * down. This might confuse some
2021 * clients. Can be changed if
2022 * someone reports trouble...
2023 */
2024 ;
2025 }
2026 }
2027 }
2028 }
2029 if (found_entry) {
2030 pr_debug("After vcc was added\n");
2031 dump_arp_table(priv);
2032 goto out;
2033 }
2034 /*
2035 * Not found, snatch address from first data packet that arrives
2036 * from this vcc
2037 */
2038 entry = make_entry(priv, bus_mac);
2039 if (!entry)
2040 goto out;
2041 entry->vcc = vcc;
2042 entry->old_push = old_push;
2043 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2044 eth_zero_addr(entry->mac_addr);
2045 entry->status = ESI_UNKNOWN;
2046 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2047 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2048 entry->timer.function = lec_arp_expire_vcc;
2049 add_timer(&entry->timer);
2050 pr_debug("After vcc was added\n");
2051 dump_arp_table(priv);
2052out:
2053 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2054}
2055
2056static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2057{
2058 unsigned long flags;
2059 struct lec_arp_table *entry;
2060 int i;
2061
2062 pr_debug("%lx\n", tran_id);
2063restart:
2064 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2065 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2066 hlist_for_each_entry(entry,
2067 &priv->lec_arp_tables[i], next) {
2068 if (entry->flush_tran_id == tran_id &&
2069 entry->status == ESI_FLUSH_PENDING) {
2070 struct sk_buff *skb;
2071 struct atm_vcc *vcc = entry->vcc;
2072
2073 lec_arp_hold(entry);
2074 spin_unlock_irqrestore(&priv->lec_arp_lock,
2075 flags);
2076 while ((skb = skb_dequeue(&entry->tx_wait)))
2077 lec_send(vcc, skb);
2078 entry->last_used = jiffies;
2079 entry->status = ESI_FORWARD_DIRECT;
2080 lec_arp_put(entry);
2081 pr_debug("LEC_ARP: Flushed\n");
2082 goto restart;
2083 }
2084 }
2085 }
2086 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2087 dump_arp_table(priv);
2088}
2089
2090static void
2091lec_set_flush_tran_id(struct lec_priv *priv,
2092 const unsigned char *atm_addr, unsigned long tran_id)
2093{
2094 unsigned long flags;
2095 struct lec_arp_table *entry;
2096 int i;
2097
2098 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2099 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2100 hlist_for_each_entry(entry,
2101 &priv->lec_arp_tables[i], next) {
2102 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2103 entry->flush_tran_id = tran_id;
2104 pr_debug("Set flush transaction id to %lx for %p\n",
2105 tran_id, entry);
2106 }
2107 }
2108 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2109}
2110
2111static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2112{
2113 unsigned long flags;
2114 unsigned char mac_addr[] = {
2115 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2116 };
2117 struct lec_arp_table *to_add;
2118 struct lec_vcc_priv *vpriv;
2119 int err = 0;
2120
2121 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2122 if (!vpriv)
2123 return -ENOMEM;
2124 vpriv->xoff = 0;
2125 vpriv->old_pop = vcc->pop;
2126 vcc->user_back = vpriv;
2127 vcc->pop = lec_pop;
2128 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2129 to_add = make_entry(priv, mac_addr);
2130 if (!to_add) {
2131 vcc->pop = vpriv->old_pop;
2132 kfree(vpriv);
2133 err = -ENOMEM;
2134 goto out;
2135 }
2136 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2137 to_add->status = ESI_FORWARD_DIRECT;
2138 to_add->flags |= LEC_PERMANENT_FLAG;
2139 to_add->vcc = vcc;
2140 to_add->old_push = vcc->push;
2141 vcc->push = lec_push;
2142 priv->mcast_vcc = vcc;
2143 lec_arp_add(priv, to_add);
2144out:
2145 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2146 return err;
2147}
2148
2149static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2150{
2151 unsigned long flags;
2152 struct hlist_node *next;
2153 struct lec_arp_table *entry;
2154 int i;
2155
2156 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2157 dump_arp_table(priv);
2158
2159 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2160
2161 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2162 hlist_for_each_entry_safe(entry, next,
2163 &priv->lec_arp_tables[i], next) {
2164 if (vcc == entry->vcc) {
2165 lec_arp_remove(priv, entry);
2166 lec_arp_put(entry);
2167 if (priv->mcast_vcc == vcc)
2168 priv->mcast_vcc = NULL;
2169 }
2170 }
2171 }
2172
2173 hlist_for_each_entry_safe(entry, next,
2174 &priv->lec_arp_empty_ones, next) {
2175 if (entry->vcc == vcc) {
2176 lec_arp_clear_vccs(entry);
2177 del_timer(&entry->timer);
2178 hlist_del(&entry->next);
2179 lec_arp_put(entry);
2180 }
2181 }
2182
2183 hlist_for_each_entry_safe(entry, next,
2184 &priv->lec_no_forward, next) {
2185 if (entry->recv_vcc == vcc) {
2186 lec_arp_clear_vccs(entry);
2187 del_timer(&entry->timer);
2188 hlist_del(&entry->next);
2189 lec_arp_put(entry);
2190 }
2191 }
2192
2193 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2194 if (entry->recv_vcc == vcc) {
2195 lec_arp_clear_vccs(entry);
2196 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2197 hlist_del(&entry->next);
2198 lec_arp_put(entry);
2199 }
2200 }
2201
2202 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2203 dump_arp_table(priv);
2204}
2205
2206static void
2207lec_arp_check_empties(struct lec_priv *priv,
2208 struct atm_vcc *vcc, struct sk_buff *skb)
2209{
2210 unsigned long flags;
2211 struct hlist_node *next;
2212 struct lec_arp_table *entry, *tmp;
2213 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2214 unsigned char *src = hdr->h_source;
2215
2216 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2217 hlist_for_each_entry_safe(entry, next,
2218 &priv->lec_arp_empty_ones, next) {
2219 if (vcc == entry->vcc) {
2220 del_timer(&entry->timer);
2221 ether_addr_copy(entry->mac_addr, src);
2222 entry->status = ESI_FORWARD_DIRECT;
2223 entry->last_used = jiffies;
2224 /* We might have got an entry */
2225 tmp = lec_arp_find(priv, src);
2226 if (tmp) {
2227 lec_arp_remove(priv, tmp);
2228 lec_arp_put(tmp);
2229 }
2230 hlist_del(&entry->next);
2231 lec_arp_add(priv, entry);
2232 goto out;
2233 }
2234 }
2235 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2236out:
2237 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2238}
2239
2240MODULE_LICENSE("GPL");
1/*
2 * lec.c: Lan Emulation driver
3 *
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
6
7#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
8
9#include <linux/slab.h>
10#include <linux/kernel.h>
11#include <linux/bitops.h>
12#include <linux/capability.h>
13
14/* We are ethernet device */
15#include <linux/if_ether.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <net/sock.h>
19#include <linux/skbuff.h>
20#include <linux/ip.h>
21#include <asm/byteorder.h>
22#include <linux/uaccess.h>
23#include <net/arp.h>
24#include <net/dst.h>
25#include <linux/proc_fs.h>
26#include <linux/spinlock.h>
27#include <linux/seq_file.h>
28
29/* And atm device */
30#include <linux/atmdev.h>
31#include <linux/atmlec.h>
32
33/* Proxy LEC knows about bridging */
34#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
35#include "../bridge/br_private.h"
36
37static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
38#endif
39
40/* Modular too */
41#include <linux/module.h>
42#include <linux/init.h>
43
44#include "lec.h"
45#include "lec_arpc.h"
46#include "resources.h"
47
48#define DUMP_PACKETS 0 /*
49 * 0 = None,
50 * 1 = 30 first bytes
51 * 2 = Whole packet
52 */
53
54#define LEC_UNRES_QUE_LEN 8 /*
55 * number of tx packets to queue for a
56 * single destination while waiting for SVC
57 */
58
59static int lec_open(struct net_device *dev);
60static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
61 struct net_device *dev);
62static int lec_close(struct net_device *dev);
63static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
64 const unsigned char *mac_addr);
65static int lec_arp_remove(struct lec_priv *priv,
66 struct lec_arp_table *to_remove);
67/* LANE2 functions */
68static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
69 const u8 *tlvs, u32 sizeoftlvs);
70static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
71 u8 **tlvs, u32 *sizeoftlvs);
72static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
73 const u8 *tlvs, u32 sizeoftlvs);
74
75static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
76 unsigned long permanent);
77static void lec_arp_check_empties(struct lec_priv *priv,
78 struct atm_vcc *vcc, struct sk_buff *skb);
79static void lec_arp_destroy(struct lec_priv *priv);
80static void lec_arp_init(struct lec_priv *priv);
81static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
82 const unsigned char *mac_to_find,
83 int is_rdesc,
84 struct lec_arp_table **ret_entry);
85static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
86 const unsigned char *atm_addr,
87 unsigned long remoteflag,
88 unsigned int targetless_le_arp);
89static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
90static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
91static void lec_set_flush_tran_id(struct lec_priv *priv,
92 const unsigned char *atm_addr,
93 unsigned long tran_id);
94static void lec_vcc_added(struct lec_priv *priv,
95 const struct atmlec_ioc *ioc_data,
96 struct atm_vcc *vcc,
97 void (*old_push)(struct atm_vcc *vcc,
98 struct sk_buff *skb));
99static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
100
101/* must be done under lec_arp_lock */
102static inline void lec_arp_hold(struct lec_arp_table *entry)
103{
104 atomic_inc(&entry->usage);
105}
106
107static inline void lec_arp_put(struct lec_arp_table *entry)
108{
109 if (atomic_dec_and_test(&entry->usage))
110 kfree(entry);
111}
112
113static struct lane2_ops lane2_ops = {
114 lane2_resolve, /* resolve, spec 3.1.3 */
115 lane2_associate_req, /* associate_req, spec 3.1.4 */
116 NULL /* associate indicator, spec 3.1.5 */
117};
118
119static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
120
121/* Device structures */
122static struct net_device *dev_lec[MAX_LEC_ITF];
123
124#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
125static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
126{
127 char *buff;
128 struct lec_priv *priv;
129
130 /*
131 * Check if this is a BPDU. If so, ask zeppelin to send
132 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
133 * as the Config BPDU has
134 */
135 buff = skb->data + skb->dev->hard_header_len;
136 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
137 struct sock *sk;
138 struct sk_buff *skb2;
139 struct atmlec_msg *mesg;
140
141 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
142 if (skb2 == NULL)
143 return;
144 skb2->len = sizeof(struct atmlec_msg);
145 mesg = (struct atmlec_msg *)skb2->data;
146 mesg->type = l_topology_change;
147 buff += 4;
148 mesg->content.normal.flag = *buff & 0x01;
149 /* 0x01 is topology change */
150
151 priv = netdev_priv(dev);
152 atm_force_charge(priv->lecd, skb2->truesize);
153 sk = sk_atm(priv->lecd);
154 skb_queue_tail(&sk->sk_receive_queue, skb2);
155 sk->sk_data_ready(sk);
156 }
157}
158#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
159
160/*
161 * Open/initialize the netdevice. This is called (in the current kernel)
162 * sometime after booting when the 'ifconfig' program is run.
163 *
164 * This routine should set everything up anew at each open, even
165 * registers that "should" only need to be set once at boot, so that
166 * there is non-reboot way to recover if something goes wrong.
167 */
168
169static int lec_open(struct net_device *dev)
170{
171 netif_start_queue(dev);
172
173 return 0;
174}
175
176static void
177lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
178{
179 struct net_device *dev = skb->dev;
180
181 ATM_SKB(skb)->vcc = vcc;
182 ATM_SKB(skb)->atm_options = vcc->atm_options;
183
184 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
185 if (vcc->send(vcc, skb) < 0) {
186 dev->stats.tx_dropped++;
187 return;
188 }
189
190 dev->stats.tx_packets++;
191 dev->stats.tx_bytes += skb->len;
192}
193
194static void lec_tx_timeout(struct net_device *dev)
195{
196 pr_info("%s\n", dev->name);
197 dev->trans_start = jiffies;
198 netif_wake_queue(dev);
199}
200
201static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
202 struct net_device *dev)
203{
204 struct sk_buff *skb2;
205 struct lec_priv *priv = netdev_priv(dev);
206 struct lecdatahdr_8023 *lec_h;
207 struct atm_vcc *vcc;
208 struct lec_arp_table *entry;
209 unsigned char *dst;
210 int min_frame_size;
211 int is_rdesc;
212
213 pr_debug("called\n");
214 if (!priv->lecd) {
215 pr_info("%s:No lecd attached\n", dev->name);
216 dev->stats.tx_errors++;
217 netif_stop_queue(dev);
218 kfree_skb(skb);
219 return NETDEV_TX_OK;
220 }
221
222 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
223 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
224 (long)skb_end_pointer(skb));
225#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
226 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
227 lec_handle_bridge(skb, dev);
228#endif
229
230 /* Make sure we have room for lec_id */
231 if (skb_headroom(skb) < 2) {
232 pr_debug("reallocating skb\n");
233 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
234 if (unlikely(!skb2)) {
235 kfree_skb(skb);
236 return NETDEV_TX_OK;
237 }
238 consume_skb(skb);
239 skb = skb2;
240 }
241 skb_push(skb, 2);
242
243 /* Put le header to place */
244 lec_h = (struct lecdatahdr_8023 *)skb->data;
245 lec_h->le_header = htons(priv->lecid);
246
247#if DUMP_PACKETS >= 2
248#define MAX_DUMP_SKB 99
249#elif DUMP_PACKETS >= 1
250#define MAX_DUMP_SKB 30
251#endif
252#if DUMP_PACKETS >= 1
253 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
254 dev->name, skb->len, priv->lecid);
255 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
256 skb->data, min(skb->len, MAX_DUMP_SKB), true);
257#endif /* DUMP_PACKETS >= 1 */
258
259 /* Minimum ethernet-frame size */
260 min_frame_size = LEC_MINIMUM_8023_SIZE;
261 if (skb->len < min_frame_size) {
262 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
263 skb2 = skb_copy_expand(skb, 0,
264 min_frame_size - skb->truesize,
265 GFP_ATOMIC);
266 dev_kfree_skb(skb);
267 if (skb2 == NULL) {
268 dev->stats.tx_dropped++;
269 return NETDEV_TX_OK;
270 }
271 skb = skb2;
272 }
273 skb_put(skb, min_frame_size - skb->len);
274 }
275
276 /* Send to right vcc */
277 is_rdesc = 0;
278 dst = lec_h->h_dest;
279 entry = NULL;
280 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
281 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
282 dev->name, vcc, vcc ? vcc->flags : 0, entry);
283 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
284 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
285 pr_debug("%s:queuing packet, MAC address %pM\n",
286 dev->name, lec_h->h_dest);
287 skb_queue_tail(&entry->tx_wait, skb);
288 } else {
289 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
290 dev->name, lec_h->h_dest);
291 dev->stats.tx_dropped++;
292 dev_kfree_skb(skb);
293 }
294 goto out;
295 }
296#if DUMP_PACKETS > 0
297 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
298 dev->name, vcc->vpi, vcc->vci);
299#endif /* DUMP_PACKETS > 0 */
300
301 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
302 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
303 lec_send(vcc, skb2);
304 }
305
306 lec_send(vcc, skb);
307
308 if (!atm_may_send(vcc, 0)) {
309 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
310
311 vpriv->xoff = 1;
312 netif_stop_queue(dev);
313
314 /*
315 * vcc->pop() might have occurred in between, making
316 * the vcc usuable again. Since xmit is serialized,
317 * this is the only situation we have to re-test.
318 */
319
320 if (atm_may_send(vcc, 0))
321 netif_wake_queue(dev);
322 }
323
324out:
325 if (entry)
326 lec_arp_put(entry);
327 dev->trans_start = jiffies;
328 return NETDEV_TX_OK;
329}
330
331/* The inverse routine to net_open(). */
332static int lec_close(struct net_device *dev)
333{
334 netif_stop_queue(dev);
335 return 0;
336}
337
338static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
339{
340 unsigned long flags;
341 struct net_device *dev = (struct net_device *)vcc->proto_data;
342 struct lec_priv *priv = netdev_priv(dev);
343 struct atmlec_msg *mesg;
344 struct lec_arp_table *entry;
345 int i;
346 char *tmp; /* FIXME */
347
348 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
349 mesg = (struct atmlec_msg *)skb->data;
350 tmp = skb->data;
351 tmp += sizeof(struct atmlec_msg);
352 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
353 switch (mesg->type) {
354 case l_set_mac_addr:
355 for (i = 0; i < 6; i++)
356 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
357 break;
358 case l_del_mac_addr:
359 for (i = 0; i < 6; i++)
360 dev->dev_addr[i] = 0;
361 break;
362 case l_addr_delete:
363 lec_addr_delete(priv, mesg->content.normal.atm_addr,
364 mesg->content.normal.flag);
365 break;
366 case l_topology_change:
367 priv->topology_change = mesg->content.normal.flag;
368 break;
369 case l_flush_complete:
370 lec_flush_complete(priv, mesg->content.normal.flag);
371 break;
372 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
373 spin_lock_irqsave(&priv->lec_arp_lock, flags);
374 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
375 lec_arp_remove(priv, entry);
376 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
377
378 if (mesg->content.normal.no_source_le_narp)
379 break;
380 /* FALL THROUGH */
381 case l_arp_update:
382 lec_arp_update(priv, mesg->content.normal.mac_addr,
383 mesg->content.normal.atm_addr,
384 mesg->content.normal.flag,
385 mesg->content.normal.targetless_le_arp);
386 pr_debug("in l_arp_update\n");
387 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
388 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
389 mesg->sizeoftlvs);
390 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
391 tmp, mesg->sizeoftlvs);
392 }
393 break;
394 case l_config:
395 priv->maximum_unknown_frame_count =
396 mesg->content.config.maximum_unknown_frame_count;
397 priv->max_unknown_frame_time =
398 (mesg->content.config.max_unknown_frame_time * HZ);
399 priv->max_retry_count = mesg->content.config.max_retry_count;
400 priv->aging_time = (mesg->content.config.aging_time * HZ);
401 priv->forward_delay_time =
402 (mesg->content.config.forward_delay_time * HZ);
403 priv->arp_response_time =
404 (mesg->content.config.arp_response_time * HZ);
405 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
406 priv->path_switching_delay =
407 (mesg->content.config.path_switching_delay * HZ);
408 priv->lane_version = mesg->content.config.lane_version;
409 /* LANE2 */
410 priv->lane2_ops = NULL;
411 if (priv->lane_version > 1)
412 priv->lane2_ops = &lane2_ops;
413 rtnl_lock();
414 if (dev_set_mtu(dev, mesg->content.config.mtu))
415 pr_info("%s: change_mtu to %d failed\n",
416 dev->name, mesg->content.config.mtu);
417 rtnl_unlock();
418 priv->is_proxy = mesg->content.config.is_proxy;
419 break;
420 case l_flush_tran_id:
421 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
422 mesg->content.normal.flag);
423 break;
424 case l_set_lecid:
425 priv->lecid =
426 (unsigned short)(0xffff & mesg->content.normal.flag);
427 break;
428 case l_should_bridge:
429#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
430 {
431 pr_debug("%s: bridge zeppelin asks about %pM\n",
432 dev->name, mesg->content.proxy.mac_addr);
433
434 if (br_fdb_test_addr_hook == NULL)
435 break;
436
437 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
438 /* hit from bridge table, send LE_ARP_RESPONSE */
439 struct sk_buff *skb2;
440 struct sock *sk;
441
442 pr_debug("%s: entry found, responding to zeppelin\n",
443 dev->name);
444 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
445 if (skb2 == NULL)
446 break;
447 skb2->len = sizeof(struct atmlec_msg);
448 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
449 atm_force_charge(priv->lecd, skb2->truesize);
450 sk = sk_atm(priv->lecd);
451 skb_queue_tail(&sk->sk_receive_queue, skb2);
452 sk->sk_data_ready(sk);
453 }
454 }
455#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
456 break;
457 default:
458 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
459 dev_kfree_skb(skb);
460 return -EINVAL;
461 }
462 dev_kfree_skb(skb);
463 return 0;
464}
465
466static void lec_atm_close(struct atm_vcc *vcc)
467{
468 struct sk_buff *skb;
469 struct net_device *dev = (struct net_device *)vcc->proto_data;
470 struct lec_priv *priv = netdev_priv(dev);
471
472 priv->lecd = NULL;
473 /* Do something needful? */
474
475 netif_stop_queue(dev);
476 lec_arp_destroy(priv);
477
478 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
479 pr_info("%s closing with messages pending\n", dev->name);
480 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
481 atm_return(vcc, skb->truesize);
482 dev_kfree_skb(skb);
483 }
484
485 pr_info("%s: Shut down!\n", dev->name);
486 module_put(THIS_MODULE);
487}
488
489static struct atmdev_ops lecdev_ops = {
490 .close = lec_atm_close,
491 .send = lec_atm_send
492};
493
494static struct atm_dev lecatm_dev = {
495 .ops = &lecdev_ops,
496 .type = "lec",
497 .number = 999, /* dummy device number */
498 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
499};
500
501/*
502 * LANE2: new argument struct sk_buff *data contains
503 * the LE_ARP based TLVs introduced in the LANE2 spec
504 */
505static int
506send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
507 const unsigned char *mac_addr, const unsigned char *atm_addr,
508 struct sk_buff *data)
509{
510 struct sock *sk;
511 struct sk_buff *skb;
512 struct atmlec_msg *mesg;
513
514 if (!priv || !priv->lecd)
515 return -1;
516 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
517 if (!skb)
518 return -1;
519 skb->len = sizeof(struct atmlec_msg);
520 mesg = (struct atmlec_msg *)skb->data;
521 memset(mesg, 0, sizeof(struct atmlec_msg));
522 mesg->type = type;
523 if (data != NULL)
524 mesg->sizeoftlvs = data->len;
525 if (mac_addr)
526 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
527 else
528 mesg->content.normal.targetless_le_arp = 1;
529 if (atm_addr)
530 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
531
532 atm_force_charge(priv->lecd, skb->truesize);
533 sk = sk_atm(priv->lecd);
534 skb_queue_tail(&sk->sk_receive_queue, skb);
535 sk->sk_data_ready(sk);
536
537 if (data != NULL) {
538 pr_debug("about to send %d bytes of data\n", data->len);
539 atm_force_charge(priv->lecd, data->truesize);
540 skb_queue_tail(&sk->sk_receive_queue, data);
541 sk->sk_data_ready(sk);
542 }
543
544 return 0;
545}
546
547/* shamelessly stolen from drivers/net/net_init.c */
548static int lec_change_mtu(struct net_device *dev, int new_mtu)
549{
550 if ((new_mtu < 68) || (new_mtu > 18190))
551 return -EINVAL;
552 dev->mtu = new_mtu;
553 return 0;
554}
555
556static void lec_set_multicast_list(struct net_device *dev)
557{
558 /*
559 * by default, all multicast frames arrive over the bus.
560 * eventually support selective multicast service
561 */
562}
563
564static const struct net_device_ops lec_netdev_ops = {
565 .ndo_open = lec_open,
566 .ndo_stop = lec_close,
567 .ndo_start_xmit = lec_start_xmit,
568 .ndo_change_mtu = lec_change_mtu,
569 .ndo_tx_timeout = lec_tx_timeout,
570 .ndo_set_rx_mode = lec_set_multicast_list,
571};
572
573static const unsigned char lec_ctrl_magic[] = {
574 0xff,
575 0x00,
576 0x01,
577 0x01
578};
579
580#define LEC_DATA_DIRECT_8023 2
581#define LEC_DATA_DIRECT_8025 3
582
583static int lec_is_data_direct(struct atm_vcc *vcc)
584{
585 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
586 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
587}
588
589static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
590{
591 unsigned long flags;
592 struct net_device *dev = (struct net_device *)vcc->proto_data;
593 struct lec_priv *priv = netdev_priv(dev);
594
595#if DUMP_PACKETS > 0
596 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
597 dev->name, vcc->vpi, vcc->vci);
598#endif
599 if (!skb) {
600 pr_debug("%s: null skb\n", dev->name);
601 lec_vcc_close(priv, vcc);
602 return;
603 }
604#if DUMP_PACKETS >= 2
605#define MAX_SKB_DUMP 99
606#elif DUMP_PACKETS >= 1
607#define MAX_SKB_DUMP 30
608#endif
609#if DUMP_PACKETS > 0
610 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
611 dev->name, skb->len, priv->lecid);
612 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
613 skb->data, min(MAX_SKB_DUMP, skb->len), true);
614#endif /* DUMP_PACKETS > 0 */
615 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
616 /* Control frame, to daemon */
617 struct sock *sk = sk_atm(vcc);
618
619 pr_debug("%s: To daemon\n", dev->name);
620 skb_queue_tail(&sk->sk_receive_queue, skb);
621 sk->sk_data_ready(sk);
622 } else { /* Data frame, queue to protocol handlers */
623 struct lec_arp_table *entry;
624 unsigned char *src, *dst;
625
626 atm_return(vcc, skb->truesize);
627 if (*(__be16 *) skb->data == htons(priv->lecid) ||
628 !priv->lecd || !(dev->flags & IFF_UP)) {
629 /*
630 * Probably looping back, or if lecd is missing,
631 * lecd has gone down
632 */
633 pr_debug("Ignoring frame...\n");
634 dev_kfree_skb(skb);
635 return;
636 }
637 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
638
639 /*
640 * If this is a Data Direct VCC, and the VCC does not match
641 * the LE_ARP cache entry, delete the LE_ARP cache entry.
642 */
643 spin_lock_irqsave(&priv->lec_arp_lock, flags);
644 if (lec_is_data_direct(vcc)) {
645 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
646 entry = lec_arp_find(priv, src);
647 if (entry && entry->vcc != vcc) {
648 lec_arp_remove(priv, entry);
649 lec_arp_put(entry);
650 }
651 }
652 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
653
654 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
655 !priv->is_proxy && /* Proxy wants all the packets */
656 memcmp(dst, dev->dev_addr, dev->addr_len)) {
657 dev_kfree_skb(skb);
658 return;
659 }
660 if (!hlist_empty(&priv->lec_arp_empty_ones))
661 lec_arp_check_empties(priv, vcc, skb);
662 skb_pull(skb, 2); /* skip lec_id */
663 skb->protocol = eth_type_trans(skb, dev);
664 dev->stats.rx_packets++;
665 dev->stats.rx_bytes += skb->len;
666 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
667 netif_rx(skb);
668 }
669}
670
671static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
672{
673 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
674 struct net_device *dev = skb->dev;
675
676 if (vpriv == NULL) {
677 pr_info("vpriv = NULL!?!?!?\n");
678 return;
679 }
680
681 vpriv->old_pop(vcc, skb);
682
683 if (vpriv->xoff && atm_may_send(vcc, 0)) {
684 vpriv->xoff = 0;
685 if (netif_running(dev) && netif_queue_stopped(dev))
686 netif_wake_queue(dev);
687 }
688}
689
690static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
691{
692 struct lec_vcc_priv *vpriv;
693 int bytes_left;
694 struct atmlec_ioc ioc_data;
695
696 /* Lecd must be up in this case */
697 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
698 if (bytes_left != 0)
699 pr_info("copy from user failed for %d bytes\n", bytes_left);
700 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
701 !dev_lec[ioc_data.dev_num])
702 return -EINVAL;
703 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
704 if (!vpriv)
705 return -ENOMEM;
706 vpriv->xoff = 0;
707 vpriv->old_pop = vcc->pop;
708 vcc->user_back = vpriv;
709 vcc->pop = lec_pop;
710 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
711 &ioc_data, vcc, vcc->push);
712 vcc->proto_data = dev_lec[ioc_data.dev_num];
713 vcc->push = lec_push;
714 return 0;
715}
716
717static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
718{
719 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
720 return -EINVAL;
721 vcc->proto_data = dev_lec[arg];
722 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
723}
724
725/* Initialize device. */
726static int lecd_attach(struct atm_vcc *vcc, int arg)
727{
728 int i;
729 struct lec_priv *priv;
730
731 if (arg < 0)
732 i = 0;
733 else
734 i = arg;
735 if (arg >= MAX_LEC_ITF)
736 return -EINVAL;
737 if (!dev_lec[i]) {
738 int size;
739
740 size = sizeof(struct lec_priv);
741 dev_lec[i] = alloc_etherdev(size);
742 if (!dev_lec[i])
743 return -ENOMEM;
744 dev_lec[i]->netdev_ops = &lec_netdev_ops;
745 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
746 if (register_netdev(dev_lec[i])) {
747 free_netdev(dev_lec[i]);
748 return -EINVAL;
749 }
750
751 priv = netdev_priv(dev_lec[i]);
752 } else {
753 priv = netdev_priv(dev_lec[i]);
754 if (priv->lecd)
755 return -EADDRINUSE;
756 }
757 lec_arp_init(priv);
758 priv->itfnum = i; /* LANE2 addition */
759 priv->lecd = vcc;
760 vcc->dev = &lecatm_dev;
761 vcc_insert_socket(sk_atm(vcc));
762
763 vcc->proto_data = dev_lec[i];
764 set_bit(ATM_VF_META, &vcc->flags);
765 set_bit(ATM_VF_READY, &vcc->flags);
766
767 /* Set default values to these variables */
768 priv->maximum_unknown_frame_count = 1;
769 priv->max_unknown_frame_time = (1 * HZ);
770 priv->vcc_timeout_period = (1200 * HZ);
771 priv->max_retry_count = 1;
772 priv->aging_time = (300 * HZ);
773 priv->forward_delay_time = (15 * HZ);
774 priv->topology_change = 0;
775 priv->arp_response_time = (1 * HZ);
776 priv->flush_timeout = (4 * HZ);
777 priv->path_switching_delay = (6 * HZ);
778
779 if (dev_lec[i]->flags & IFF_UP)
780 netif_start_queue(dev_lec[i]);
781 __module_get(THIS_MODULE);
782 return i;
783}
784
785#ifdef CONFIG_PROC_FS
786static const char *lec_arp_get_status_string(unsigned char status)
787{
788 static const char *const lec_arp_status_string[] = {
789 "ESI_UNKNOWN ",
790 "ESI_ARP_PENDING ",
791 "ESI_VC_PENDING ",
792 "<Undefined> ",
793 "ESI_FLUSH_PENDING ",
794 "ESI_FORWARD_DIRECT"
795 };
796
797 if (status > ESI_FORWARD_DIRECT)
798 status = 3; /* ESI_UNDEFINED */
799 return lec_arp_status_string[status];
800}
801
802static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
803{
804 int i;
805
806 for (i = 0; i < ETH_ALEN; i++)
807 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
808 seq_printf(seq, " ");
809 for (i = 0; i < ATM_ESA_LEN; i++)
810 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
811 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
812 entry->flags & 0xffff);
813 if (entry->vcc)
814 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
815 else
816 seq_printf(seq, " ");
817 if (entry->recv_vcc) {
818 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
819 entry->recv_vcc->vci);
820 }
821 seq_putc(seq, '\n');
822}
823
824struct lec_state {
825 unsigned long flags;
826 struct lec_priv *locked;
827 struct hlist_node *node;
828 struct net_device *dev;
829 int itf;
830 int arp_table;
831 int misc_table;
832};
833
834static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
835 loff_t *l)
836{
837 struct hlist_node *e = state->node;
838
839 if (!e)
840 e = tbl->first;
841 if (e == SEQ_START_TOKEN) {
842 e = tbl->first;
843 --*l;
844 }
845
846 for (; e; e = e->next) {
847 if (--*l < 0)
848 break;
849 }
850 state->node = e;
851
852 return (*l < 0) ? state : NULL;
853}
854
855static void *lec_arp_walk(struct lec_state *state, loff_t *l,
856 struct lec_priv *priv)
857{
858 void *v = NULL;
859 int p;
860
861 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
862 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
863 if (v)
864 break;
865 }
866 state->arp_table = p;
867 return v;
868}
869
870static void *lec_misc_walk(struct lec_state *state, loff_t *l,
871 struct lec_priv *priv)
872{
873 struct hlist_head *lec_misc_tables[] = {
874 &priv->lec_arp_empty_ones,
875 &priv->lec_no_forward,
876 &priv->mcast_fwds
877 };
878 void *v = NULL;
879 int q;
880
881 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
882 v = lec_tbl_walk(state, lec_misc_tables[q], l);
883 if (v)
884 break;
885 }
886 state->misc_table = q;
887 return v;
888}
889
890static void *lec_priv_walk(struct lec_state *state, loff_t *l,
891 struct lec_priv *priv)
892{
893 if (!state->locked) {
894 state->locked = priv;
895 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
896 }
897 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
898 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
899 state->locked = NULL;
900 /* Partial state reset for the next time we get called */
901 state->arp_table = state->misc_table = 0;
902 }
903 return state->locked;
904}
905
906static void *lec_itf_walk(struct lec_state *state, loff_t *l)
907{
908 struct net_device *dev;
909 void *v;
910
911 dev = state->dev ? state->dev : dev_lec[state->itf];
912 v = (dev && netdev_priv(dev)) ?
913 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
914 if (!v && dev) {
915 dev_put(dev);
916 /* Partial state reset for the next time we get called */
917 dev = NULL;
918 }
919 state->dev = dev;
920 return v;
921}
922
923static void *lec_get_idx(struct lec_state *state, loff_t l)
924{
925 void *v = NULL;
926
927 for (; state->itf < MAX_LEC_ITF; state->itf++) {
928 v = lec_itf_walk(state, &l);
929 if (v)
930 break;
931 }
932 return v;
933}
934
935static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
936{
937 struct lec_state *state = seq->private;
938
939 state->itf = 0;
940 state->dev = NULL;
941 state->locked = NULL;
942 state->arp_table = 0;
943 state->misc_table = 0;
944 state->node = SEQ_START_TOKEN;
945
946 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
947}
948
949static void lec_seq_stop(struct seq_file *seq, void *v)
950{
951 struct lec_state *state = seq->private;
952
953 if (state->dev) {
954 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
955 state->flags);
956 dev_put(state->dev);
957 }
958}
959
960static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
961{
962 struct lec_state *state = seq->private;
963
964 v = lec_get_idx(state, 1);
965 *pos += !!PTR_ERR(v);
966 return v;
967}
968
969static int lec_seq_show(struct seq_file *seq, void *v)
970{
971 static const char lec_banner[] =
972 "Itf MAC ATM destination"
973 " Status Flags "
974 "VPI/VCI Recv VPI/VCI\n";
975
976 if (v == SEQ_START_TOKEN)
977 seq_puts(seq, lec_banner);
978 else {
979 struct lec_state *state = seq->private;
980 struct net_device *dev = state->dev;
981 struct lec_arp_table *entry = hlist_entry(state->node,
982 struct lec_arp_table,
983 next);
984
985 seq_printf(seq, "%s ", dev->name);
986 lec_info(seq, entry);
987 }
988 return 0;
989}
990
991static const struct seq_operations lec_seq_ops = {
992 .start = lec_seq_start,
993 .next = lec_seq_next,
994 .stop = lec_seq_stop,
995 .show = lec_seq_show,
996};
997
998static int lec_seq_open(struct inode *inode, struct file *file)
999{
1000 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1001}
1002
1003static const struct file_operations lec_seq_fops = {
1004 .owner = THIS_MODULE,
1005 .open = lec_seq_open,
1006 .read = seq_read,
1007 .llseek = seq_lseek,
1008 .release = seq_release_private,
1009};
1010#endif
1011
1012static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1013{
1014 struct atm_vcc *vcc = ATM_SD(sock);
1015 int err = 0;
1016
1017 switch (cmd) {
1018 case ATMLEC_CTRL:
1019 case ATMLEC_MCAST:
1020 case ATMLEC_DATA:
1021 if (!capable(CAP_NET_ADMIN))
1022 return -EPERM;
1023 break;
1024 default:
1025 return -ENOIOCTLCMD;
1026 }
1027
1028 switch (cmd) {
1029 case ATMLEC_CTRL:
1030 err = lecd_attach(vcc, (int)arg);
1031 if (err >= 0)
1032 sock->state = SS_CONNECTED;
1033 break;
1034 case ATMLEC_MCAST:
1035 err = lec_mcast_attach(vcc, (int)arg);
1036 break;
1037 case ATMLEC_DATA:
1038 err = lec_vcc_attach(vcc, (void __user *)arg);
1039 break;
1040 }
1041
1042 return err;
1043}
1044
1045static struct atm_ioctl lane_ioctl_ops = {
1046 .owner = THIS_MODULE,
1047 .ioctl = lane_ioctl,
1048};
1049
1050static int __init lane_module_init(void)
1051{
1052#ifdef CONFIG_PROC_FS
1053 struct proc_dir_entry *p;
1054
1055 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1056 if (!p) {
1057 pr_err("Unable to initialize /proc/net/atm/lec\n");
1058 return -ENOMEM;
1059 }
1060#endif
1061
1062 register_atm_ioctl(&lane_ioctl_ops);
1063 pr_info("lec.c: initialized\n");
1064 return 0;
1065}
1066
1067static void __exit lane_module_cleanup(void)
1068{
1069 int i;
1070
1071 remove_proc_entry("lec", atm_proc_root);
1072
1073 deregister_atm_ioctl(&lane_ioctl_ops);
1074
1075 for (i = 0; i < MAX_LEC_ITF; i++) {
1076 if (dev_lec[i] != NULL) {
1077 unregister_netdev(dev_lec[i]);
1078 free_netdev(dev_lec[i]);
1079 dev_lec[i] = NULL;
1080 }
1081 }
1082}
1083
1084module_init(lane_module_init);
1085module_exit(lane_module_cleanup);
1086
1087/*
1088 * LANE2: 3.1.3, LE_RESOLVE.request
1089 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1090 * If sizeoftlvs == NULL the default TLVs associated with with this
1091 * lec will be used.
1092 * If dst_mac == NULL, targetless LE_ARP will be sent
1093 */
1094static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1095 u8 **tlvs, u32 *sizeoftlvs)
1096{
1097 unsigned long flags;
1098 struct lec_priv *priv = netdev_priv(dev);
1099 struct lec_arp_table *table;
1100 struct sk_buff *skb;
1101 int retval;
1102
1103 if (force == 0) {
1104 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1105 table = lec_arp_find(priv, dst_mac);
1106 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1107 if (table == NULL)
1108 return -1;
1109
1110 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1111 if (*tlvs == NULL)
1112 return -1;
1113
1114 *sizeoftlvs = table->sizeoftlvs;
1115
1116 return 0;
1117 }
1118
1119 if (sizeoftlvs == NULL)
1120 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1121
1122 else {
1123 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1124 if (skb == NULL)
1125 return -1;
1126 skb->len = *sizeoftlvs;
1127 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1128 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1129 }
1130 return retval;
1131}
1132
1133/*
1134 * LANE2: 3.1.4, LE_ASSOCIATE.request
1135 * Associate the *tlvs with the *lan_dst address.
1136 * Will overwrite any previous association
1137 * Returns 1 for success, 0 for failure (out of memory)
1138 *
1139 */
1140static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1141 const u8 *tlvs, u32 sizeoftlvs)
1142{
1143 int retval;
1144 struct sk_buff *skb;
1145 struct lec_priv *priv = netdev_priv(dev);
1146
1147 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1148 return 0; /* not our mac address */
1149
1150 kfree(priv->tlvs); /* NULL if there was no previous association */
1151
1152 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1153 if (priv->tlvs == NULL)
1154 return 0;
1155 priv->sizeoftlvs = sizeoftlvs;
1156
1157 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1158 if (skb == NULL)
1159 return 0;
1160 skb->len = sizeoftlvs;
1161 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1162 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1163 if (retval != 0)
1164 pr_info("lec.c: lane2_associate_req() failed\n");
1165 /*
1166 * If the previous association has changed we must
1167 * somehow notify other LANE entities about the change
1168 */
1169 return 1;
1170}
1171
1172/*
1173 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1174 *
1175 */
1176static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1177 const u8 *tlvs, u32 sizeoftlvs)
1178{
1179#if 0
1180 int i = 0;
1181#endif
1182 struct lec_priv *priv = netdev_priv(dev);
1183#if 0 /*
1184 * Why have the TLVs in LE_ARP entries
1185 * since we do not use them? When you
1186 * uncomment this code, make sure the
1187 * TLVs get freed when entry is killed
1188 */
1189 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1190
1191 if (entry == NULL)
1192 return; /* should not happen */
1193
1194 kfree(entry->tlvs);
1195
1196 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1197 if (entry->tlvs == NULL)
1198 return;
1199 entry->sizeoftlvs = sizeoftlvs;
1200#endif
1201#if 0
1202 pr_info("\n");
1203 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1204 while (i < sizeoftlvs)
1205 pr_cont("%02x ", tlvs[i++]);
1206
1207 pr_cont("\n");
1208#endif
1209
1210 /* tell MPOA about the TLVs we saw */
1211 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1212 priv->lane2_ops->associate_indicator(dev, mac_addr,
1213 tlvs, sizeoftlvs);
1214 }
1215}
1216
1217/*
1218 * Here starts what used to lec_arpc.c
1219 *
1220 * lec_arpc.c was added here when making
1221 * lane client modular. October 1997
1222 */
1223
1224#include <linux/types.h>
1225#include <linux/timer.h>
1226#include <linux/param.h>
1227#include <linux/atomic.h>
1228#include <linux/inetdevice.h>
1229#include <net/route.h>
1230
1231#if 0
1232#define pr_debug(format, args...)
1233/*
1234 #define pr_debug printk
1235*/
1236#endif
1237#define DEBUG_ARP_TABLE 0
1238
1239#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1240
1241static void lec_arp_check_expire(struct work_struct *work);
1242static void lec_arp_expire_arp(unsigned long data);
1243
1244/*
1245 * Arp table funcs
1246 */
1247
1248#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1249
1250/*
1251 * Initialization of arp-cache
1252 */
1253static void lec_arp_init(struct lec_priv *priv)
1254{
1255 unsigned short i;
1256
1257 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1258 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1259 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1260 INIT_HLIST_HEAD(&priv->lec_no_forward);
1261 INIT_HLIST_HEAD(&priv->mcast_fwds);
1262 spin_lock_init(&priv->lec_arp_lock);
1263 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1264 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1265}
1266
1267static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1268{
1269 if (entry->vcc) {
1270 struct atm_vcc *vcc = entry->vcc;
1271 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1272 struct net_device *dev = (struct net_device *)vcc->proto_data;
1273
1274 vcc->pop = vpriv->old_pop;
1275 if (vpriv->xoff)
1276 netif_wake_queue(dev);
1277 kfree(vpriv);
1278 vcc->user_back = NULL;
1279 vcc->push = entry->old_push;
1280 vcc_release_async(vcc, -EPIPE);
1281 entry->vcc = NULL;
1282 }
1283 if (entry->recv_vcc) {
1284 entry->recv_vcc->push = entry->old_recv_push;
1285 vcc_release_async(entry->recv_vcc, -EPIPE);
1286 entry->recv_vcc = NULL;
1287 }
1288}
1289
1290/*
1291 * Insert entry to lec_arp_table
1292 * LANE2: Add to the end of the list to satisfy 8.1.13
1293 */
1294static inline void
1295lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1296{
1297 struct hlist_head *tmp;
1298
1299 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1300 hlist_add_head(&entry->next, tmp);
1301
1302 pr_debug("Added entry:%pM\n", entry->mac_addr);
1303}
1304
1305/*
1306 * Remove entry from lec_arp_table
1307 */
1308static int
1309lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1310{
1311 struct lec_arp_table *entry;
1312 int i, remove_vcc = 1;
1313
1314 if (!to_remove)
1315 return -1;
1316
1317 hlist_del(&to_remove->next);
1318 del_timer(&to_remove->timer);
1319
1320 /*
1321 * If this is the only MAC connected to this VCC,
1322 * also tear down the VCC
1323 */
1324 if (to_remove->status >= ESI_FLUSH_PENDING) {
1325 /*
1326 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1327 */
1328 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1329 hlist_for_each_entry(entry,
1330 &priv->lec_arp_tables[i], next) {
1331 if (memcmp(to_remove->atm_addr,
1332 entry->atm_addr, ATM_ESA_LEN) == 0) {
1333 remove_vcc = 0;
1334 break;
1335 }
1336 }
1337 }
1338 if (remove_vcc)
1339 lec_arp_clear_vccs(to_remove);
1340 }
1341 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1342
1343 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1344 return 0;
1345}
1346
1347#if DEBUG_ARP_TABLE
1348static const char *get_status_string(unsigned char st)
1349{
1350 switch (st) {
1351 case ESI_UNKNOWN:
1352 return "ESI_UNKNOWN";
1353 case ESI_ARP_PENDING:
1354 return "ESI_ARP_PENDING";
1355 case ESI_VC_PENDING:
1356 return "ESI_VC_PENDING";
1357 case ESI_FLUSH_PENDING:
1358 return "ESI_FLUSH_PENDING";
1359 case ESI_FORWARD_DIRECT:
1360 return "ESI_FORWARD_DIRECT";
1361 }
1362 return "<UNKNOWN>";
1363}
1364
1365static void dump_arp_table(struct lec_priv *priv)
1366{
1367 struct lec_arp_table *rulla;
1368 char buf[256];
1369 int i, j, offset;
1370
1371 pr_info("Dump %p:\n", priv);
1372 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1373 hlist_for_each_entry(rulla,
1374 &priv->lec_arp_tables[i], next) {
1375 offset = 0;
1376 offset += sprintf(buf, "%d: %p\n", i, rulla);
1377 offset += sprintf(buf + offset, "Mac: %pM",
1378 rulla->mac_addr);
1379 offset += sprintf(buf + offset, " Atm:");
1380 for (j = 0; j < ATM_ESA_LEN; j++) {
1381 offset += sprintf(buf + offset,
1382 "%2.2x ",
1383 rulla->atm_addr[j] & 0xff);
1384 }
1385 offset += sprintf(buf + offset,
1386 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1387 rulla->vcc ? rulla->vcc->vpi : 0,
1388 rulla->vcc ? rulla->vcc->vci : 0,
1389 rulla->recv_vcc ? rulla->recv_vcc->
1390 vpi : 0,
1391 rulla->recv_vcc ? rulla->recv_vcc->
1392 vci : 0, rulla->last_used,
1393 rulla->timestamp, rulla->no_tries);
1394 offset +=
1395 sprintf(buf + offset,
1396 "Flags:%x, Packets_flooded:%x, Status: %s ",
1397 rulla->flags, rulla->packets_flooded,
1398 get_status_string(rulla->status));
1399 pr_info("%s\n", buf);
1400 }
1401 }
1402
1403 if (!hlist_empty(&priv->lec_no_forward))
1404 pr_info("No forward\n");
1405 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1406 offset = 0;
1407 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1408 offset += sprintf(buf + offset, " Atm:");
1409 for (j = 0; j < ATM_ESA_LEN; j++) {
1410 offset += sprintf(buf + offset, "%2.2x ",
1411 rulla->atm_addr[j] & 0xff);
1412 }
1413 offset += sprintf(buf + offset,
1414 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1415 rulla->vcc ? rulla->vcc->vpi : 0,
1416 rulla->vcc ? rulla->vcc->vci : 0,
1417 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1418 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1419 rulla->last_used,
1420 rulla->timestamp, rulla->no_tries);
1421 offset += sprintf(buf + offset,
1422 "Flags:%x, Packets_flooded:%x, Status: %s ",
1423 rulla->flags, rulla->packets_flooded,
1424 get_status_string(rulla->status));
1425 pr_info("%s\n", buf);
1426 }
1427
1428 if (!hlist_empty(&priv->lec_arp_empty_ones))
1429 pr_info("Empty ones\n");
1430 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1431 offset = 0;
1432 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1433 offset += sprintf(buf + offset, " Atm:");
1434 for (j = 0; j < ATM_ESA_LEN; j++) {
1435 offset += sprintf(buf + offset, "%2.2x ",
1436 rulla->atm_addr[j] & 0xff);
1437 }
1438 offset += sprintf(buf + offset,
1439 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1440 rulla->vcc ? rulla->vcc->vpi : 0,
1441 rulla->vcc ? rulla->vcc->vci : 0,
1442 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1443 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1444 rulla->last_used,
1445 rulla->timestamp, rulla->no_tries);
1446 offset += sprintf(buf + offset,
1447 "Flags:%x, Packets_flooded:%x, Status: %s ",
1448 rulla->flags, rulla->packets_flooded,
1449 get_status_string(rulla->status));
1450 pr_info("%s", buf);
1451 }
1452
1453 if (!hlist_empty(&priv->mcast_fwds))
1454 pr_info("Multicast Forward VCCs\n");
1455 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1456 offset = 0;
1457 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1458 offset += sprintf(buf + offset, " Atm:");
1459 for (j = 0; j < ATM_ESA_LEN; j++) {
1460 offset += sprintf(buf + offset, "%2.2x ",
1461 rulla->atm_addr[j] & 0xff);
1462 }
1463 offset += sprintf(buf + offset,
1464 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1465 rulla->vcc ? rulla->vcc->vpi : 0,
1466 rulla->vcc ? rulla->vcc->vci : 0,
1467 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1468 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1469 rulla->last_used,
1470 rulla->timestamp, rulla->no_tries);
1471 offset += sprintf(buf + offset,
1472 "Flags:%x, Packets_flooded:%x, Status: %s ",
1473 rulla->flags, rulla->packets_flooded,
1474 get_status_string(rulla->status));
1475 pr_info("%s\n", buf);
1476 }
1477
1478}
1479#else
1480#define dump_arp_table(priv) do { } while (0)
1481#endif
1482
1483/*
1484 * Destruction of arp-cache
1485 */
1486static void lec_arp_destroy(struct lec_priv *priv)
1487{
1488 unsigned long flags;
1489 struct hlist_node *next;
1490 struct lec_arp_table *entry;
1491 int i;
1492
1493 cancel_delayed_work_sync(&priv->lec_arp_work);
1494
1495 /*
1496 * Remove all entries
1497 */
1498
1499 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1500 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1501 hlist_for_each_entry_safe(entry, next,
1502 &priv->lec_arp_tables[i], next) {
1503 lec_arp_remove(priv, entry);
1504 lec_arp_put(entry);
1505 }
1506 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1507 }
1508
1509 hlist_for_each_entry_safe(entry, next,
1510 &priv->lec_arp_empty_ones, next) {
1511 del_timer_sync(&entry->timer);
1512 lec_arp_clear_vccs(entry);
1513 hlist_del(&entry->next);
1514 lec_arp_put(entry);
1515 }
1516 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1517
1518 hlist_for_each_entry_safe(entry, next,
1519 &priv->lec_no_forward, next) {
1520 del_timer_sync(&entry->timer);
1521 lec_arp_clear_vccs(entry);
1522 hlist_del(&entry->next);
1523 lec_arp_put(entry);
1524 }
1525 INIT_HLIST_HEAD(&priv->lec_no_forward);
1526
1527 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1528 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1529 lec_arp_clear_vccs(entry);
1530 hlist_del(&entry->next);
1531 lec_arp_put(entry);
1532 }
1533 INIT_HLIST_HEAD(&priv->mcast_fwds);
1534 priv->mcast_vcc = NULL;
1535 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1536}
1537
1538/*
1539 * Find entry by mac_address
1540 */
1541static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1542 const unsigned char *mac_addr)
1543{
1544 struct hlist_head *head;
1545 struct lec_arp_table *entry;
1546
1547 pr_debug("%pM\n", mac_addr);
1548
1549 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1550 hlist_for_each_entry(entry, head, next) {
1551 if (ether_addr_equal(mac_addr, entry->mac_addr))
1552 return entry;
1553 }
1554 return NULL;
1555}
1556
1557static struct lec_arp_table *make_entry(struct lec_priv *priv,
1558 const unsigned char *mac_addr)
1559{
1560 struct lec_arp_table *to_return;
1561
1562 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1563 if (!to_return) {
1564 pr_info("LEC: Arp entry kmalloc failed\n");
1565 return NULL;
1566 }
1567 ether_addr_copy(to_return->mac_addr, mac_addr);
1568 INIT_HLIST_NODE(&to_return->next);
1569 setup_timer(&to_return->timer, lec_arp_expire_arp,
1570 (unsigned long)to_return);
1571 to_return->last_used = jiffies;
1572 to_return->priv = priv;
1573 skb_queue_head_init(&to_return->tx_wait);
1574 atomic_set(&to_return->usage, 1);
1575 return to_return;
1576}
1577
1578/* Arp sent timer expired */
1579static void lec_arp_expire_arp(unsigned long data)
1580{
1581 struct lec_arp_table *entry;
1582
1583 entry = (struct lec_arp_table *)data;
1584
1585 pr_debug("\n");
1586 if (entry->status == ESI_ARP_PENDING) {
1587 if (entry->no_tries <= entry->priv->max_retry_count) {
1588 if (entry->is_rdesc)
1589 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1590 entry->mac_addr, NULL, NULL);
1591 else
1592 send_to_lecd(entry->priv, l_arp_xmt,
1593 entry->mac_addr, NULL, NULL);
1594 entry->no_tries++;
1595 }
1596 mod_timer(&entry->timer, jiffies + (1 * HZ));
1597 }
1598}
1599
1600/* Unknown/unused vcc expire, remove associated entry */
1601static void lec_arp_expire_vcc(unsigned long data)
1602{
1603 unsigned long flags;
1604 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1605 struct lec_priv *priv = to_remove->priv;
1606
1607 del_timer(&to_remove->timer);
1608
1609 pr_debug("%p %p: vpi:%d vci:%d\n",
1610 to_remove, priv,
1611 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1612 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1613
1614 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1615 hlist_del(&to_remove->next);
1616 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1617
1618 lec_arp_clear_vccs(to_remove);
1619 lec_arp_put(to_remove);
1620}
1621
1622static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1623 unsigned long now,
1624 struct lec_priv *priv)
1625{
1626 unsigned long time_to_check;
1627
1628 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1629 time_to_check = priv->forward_delay_time;
1630 else
1631 time_to_check = priv->aging_time;
1632
1633 pr_debug("About to expire: %lx - %lx > %lx\n",
1634 now, entry->last_used, time_to_check);
1635 if (time_after(now, entry->last_used + time_to_check) &&
1636 !(entry->flags & LEC_PERMANENT_FLAG) &&
1637 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1638 /* Remove entry */
1639 pr_debug("Entry timed out\n");
1640 lec_arp_remove(priv, entry);
1641 lec_arp_put(entry);
1642 } else {
1643 /* Something else */
1644 if ((entry->status == ESI_VC_PENDING ||
1645 entry->status == ESI_ARP_PENDING) &&
1646 time_after_eq(now, entry->timestamp +
1647 priv->max_unknown_frame_time)) {
1648 entry->timestamp = jiffies;
1649 entry->packets_flooded = 0;
1650 if (entry->status == ESI_VC_PENDING)
1651 send_to_lecd(priv, l_svc_setup,
1652 entry->mac_addr,
1653 entry->atm_addr,
1654 NULL);
1655 }
1656 if (entry->status == ESI_FLUSH_PENDING &&
1657 time_after_eq(now, entry->timestamp +
1658 priv->path_switching_delay)) {
1659 lec_arp_hold(entry);
1660 return true;
1661 }
1662 }
1663
1664 return false;
1665}
1666/*
1667 * Expire entries.
1668 * 1. Re-set timer
1669 * 2. For each entry, delete entries that have aged past the age limit.
1670 * 3. For each entry, depending on the status of the entry, perform
1671 * the following maintenance.
1672 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1673 * tick_count is above the max_unknown_frame_time, clear
1674 * the tick_count to zero and clear the packets_flooded counter
1675 * to zero. This supports the packet rate limit per address
1676 * while flooding unknowns.
1677 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1678 * than or equal to the path_switching_delay, change the status
1679 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1680 * regardless of the progress of the flush protocol.
1681 */
1682static void lec_arp_check_expire(struct work_struct *work)
1683{
1684 unsigned long flags;
1685 struct lec_priv *priv =
1686 container_of(work, struct lec_priv, lec_arp_work.work);
1687 struct hlist_node *next;
1688 struct lec_arp_table *entry;
1689 unsigned long now;
1690 int i;
1691
1692 pr_debug("%p\n", priv);
1693 now = jiffies;
1694restart:
1695 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1696 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1697 hlist_for_each_entry_safe(entry, next,
1698 &priv->lec_arp_tables[i], next) {
1699 if (__lec_arp_check_expire(entry, now, priv)) {
1700 struct sk_buff *skb;
1701 struct atm_vcc *vcc = entry->vcc;
1702
1703 spin_unlock_irqrestore(&priv->lec_arp_lock,
1704 flags);
1705 while ((skb = skb_dequeue(&entry->tx_wait)))
1706 lec_send(vcc, skb);
1707 entry->last_used = jiffies;
1708 entry->status = ESI_FORWARD_DIRECT;
1709 lec_arp_put(entry);
1710
1711 goto restart;
1712 }
1713 }
1714 }
1715 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1716
1717 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1718}
1719
1720/*
1721 * Try to find vcc where mac_address is attached.
1722 *
1723 */
1724static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1725 const unsigned char *mac_to_find,
1726 int is_rdesc,
1727 struct lec_arp_table **ret_entry)
1728{
1729 unsigned long flags;
1730 struct lec_arp_table *entry;
1731 struct atm_vcc *found;
1732
1733 if (mac_to_find[0] & 0x01) {
1734 switch (priv->lane_version) {
1735 case 1:
1736 return priv->mcast_vcc;
1737 case 2: /* LANE2 wants arp for multicast addresses */
1738 if (ether_addr_equal(mac_to_find, bus_mac))
1739 return priv->mcast_vcc;
1740 break;
1741 default:
1742 break;
1743 }
1744 }
1745
1746 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1747 entry = lec_arp_find(priv, mac_to_find);
1748
1749 if (entry) {
1750 if (entry->status == ESI_FORWARD_DIRECT) {
1751 /* Connection Ok */
1752 entry->last_used = jiffies;
1753 lec_arp_hold(entry);
1754 *ret_entry = entry;
1755 found = entry->vcc;
1756 goto out;
1757 }
1758 /*
1759 * If the LE_ARP cache entry is still pending, reset count to 0
1760 * so another LE_ARP request can be made for this frame.
1761 */
1762 if (entry->status == ESI_ARP_PENDING)
1763 entry->no_tries = 0;
1764 /*
1765 * Data direct VC not yet set up, check to see if the unknown
1766 * frame count is greater than the limit. If the limit has
1767 * not been reached, allow the caller to send packet to
1768 * BUS.
1769 */
1770 if (entry->status != ESI_FLUSH_PENDING &&
1771 entry->packets_flooded <
1772 priv->maximum_unknown_frame_count) {
1773 entry->packets_flooded++;
1774 pr_debug("Flooding..\n");
1775 found = priv->mcast_vcc;
1776 goto out;
1777 }
1778 /*
1779 * We got here because entry->status == ESI_FLUSH_PENDING
1780 * or BUS flood limit was reached for an entry which is
1781 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1782 */
1783 lec_arp_hold(entry);
1784 *ret_entry = entry;
1785 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1786 entry->vcc);
1787 found = NULL;
1788 } else {
1789 /* No matching entry was found */
1790 entry = make_entry(priv, mac_to_find);
1791 pr_debug("Making entry\n");
1792 if (!entry) {
1793 found = priv->mcast_vcc;
1794 goto out;
1795 }
1796 lec_arp_add(priv, entry);
1797 /* We want arp-request(s) to be sent */
1798 entry->packets_flooded = 1;
1799 entry->status = ESI_ARP_PENDING;
1800 entry->no_tries = 1;
1801 entry->last_used = entry->timestamp = jiffies;
1802 entry->is_rdesc = is_rdesc;
1803 if (entry->is_rdesc)
1804 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1805 NULL);
1806 else
1807 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1808 entry->timer.expires = jiffies + (1 * HZ);
1809 entry->timer.function = lec_arp_expire_arp;
1810 add_timer(&entry->timer);
1811 found = priv->mcast_vcc;
1812 }
1813
1814out:
1815 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1816 return found;
1817}
1818
1819static int
1820lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1821 unsigned long permanent)
1822{
1823 unsigned long flags;
1824 struct hlist_node *next;
1825 struct lec_arp_table *entry;
1826 int i;
1827
1828 pr_debug("\n");
1829 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1830 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1831 hlist_for_each_entry_safe(entry, next,
1832 &priv->lec_arp_tables[i], next) {
1833 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1834 (permanent ||
1835 !(entry->flags & LEC_PERMANENT_FLAG))) {
1836 lec_arp_remove(priv, entry);
1837 lec_arp_put(entry);
1838 }
1839 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1840 return 0;
1841 }
1842 }
1843 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1844 return -1;
1845}
1846
1847/*
1848 * Notifies: Response to arp_request (atm_addr != NULL)
1849 */
1850static void
1851lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1852 const unsigned char *atm_addr, unsigned long remoteflag,
1853 unsigned int targetless_le_arp)
1854{
1855 unsigned long flags;
1856 struct hlist_node *next;
1857 struct lec_arp_table *entry, *tmp;
1858 int i;
1859
1860 pr_debug("%smac:%pM\n",
1861 (targetless_le_arp) ? "targetless " : "", mac_addr);
1862
1863 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1864 entry = lec_arp_find(priv, mac_addr);
1865 if (entry == NULL && targetless_le_arp)
1866 goto out; /*
1867 * LANE2: ignore targetless LE_ARPs for which
1868 * we have no entry in the cache. 7.1.30
1869 */
1870 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1871 hlist_for_each_entry_safe(entry, next,
1872 &priv->lec_arp_empty_ones, next) {
1873 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1874 hlist_del(&entry->next);
1875 del_timer(&entry->timer);
1876 tmp = lec_arp_find(priv, mac_addr);
1877 if (tmp) {
1878 del_timer(&tmp->timer);
1879 tmp->status = ESI_FORWARD_DIRECT;
1880 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1881 tmp->vcc = entry->vcc;
1882 tmp->old_push = entry->old_push;
1883 tmp->last_used = jiffies;
1884 del_timer(&entry->timer);
1885 lec_arp_put(entry);
1886 entry = tmp;
1887 } else {
1888 entry->status = ESI_FORWARD_DIRECT;
1889 ether_addr_copy(entry->mac_addr,
1890 mac_addr);
1891 entry->last_used = jiffies;
1892 lec_arp_add(priv, entry);
1893 }
1894 if (remoteflag)
1895 entry->flags |= LEC_REMOTE_FLAG;
1896 else
1897 entry->flags &= ~LEC_REMOTE_FLAG;
1898 pr_debug("After update\n");
1899 dump_arp_table(priv);
1900 goto out;
1901 }
1902 }
1903 }
1904
1905 entry = lec_arp_find(priv, mac_addr);
1906 if (!entry) {
1907 entry = make_entry(priv, mac_addr);
1908 if (!entry)
1909 goto out;
1910 entry->status = ESI_UNKNOWN;
1911 lec_arp_add(priv, entry);
1912 /* Temporary, changes before end of function */
1913 }
1914 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1915 del_timer(&entry->timer);
1916 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1917 hlist_for_each_entry(tmp,
1918 &priv->lec_arp_tables[i], next) {
1919 if (entry != tmp &&
1920 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1921 /* Vcc to this host exists */
1922 if (tmp->status > ESI_VC_PENDING) {
1923 /*
1924 * ESI_FLUSH_PENDING,
1925 * ESI_FORWARD_DIRECT
1926 */
1927 entry->vcc = tmp->vcc;
1928 entry->old_push = tmp->old_push;
1929 }
1930 entry->status = tmp->status;
1931 break;
1932 }
1933 }
1934 }
1935 if (remoteflag)
1936 entry->flags |= LEC_REMOTE_FLAG;
1937 else
1938 entry->flags &= ~LEC_REMOTE_FLAG;
1939 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1940 entry->status = ESI_VC_PENDING;
1941 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1942 }
1943 pr_debug("After update2\n");
1944 dump_arp_table(priv);
1945out:
1946 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1947}
1948
1949/*
1950 * Notifies: Vcc setup ready
1951 */
1952static void
1953lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1954 struct atm_vcc *vcc,
1955 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1956{
1957 unsigned long flags;
1958 struct lec_arp_table *entry;
1959 int i, found_entry = 0;
1960
1961 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1962 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1963 if (ioc_data->receive == 2) {
1964 pr_debug("LEC_ARP: Attaching mcast forward\n");
1965#if 0
1966 entry = lec_arp_find(priv, bus_mac);
1967 if (!entry) {
1968 pr_info("LEC_ARP: Multicast entry not found!\n");
1969 goto out;
1970 }
1971 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1972 entry->recv_vcc = vcc;
1973 entry->old_recv_push = old_push;
1974#endif
1975 entry = make_entry(priv, bus_mac);
1976 if (entry == NULL)
1977 goto out;
1978 del_timer(&entry->timer);
1979 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1980 entry->recv_vcc = vcc;
1981 entry->old_recv_push = old_push;
1982 hlist_add_head(&entry->next, &priv->mcast_fwds);
1983 goto out;
1984 } else if (ioc_data->receive == 1) {
1985 /*
1986 * Vcc which we don't want to make default vcc,
1987 * attach it anyway.
1988 */
1989 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",
1990 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1991 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1992 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1993 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1994 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1995 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1996 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1997 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1998 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
1999 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2000 entry = make_entry(priv, bus_mac);
2001 if (entry == NULL)
2002 goto out;
2003 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2004 eth_zero_addr(entry->mac_addr);
2005 entry->recv_vcc = vcc;
2006 entry->old_recv_push = old_push;
2007 entry->status = ESI_UNKNOWN;
2008 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2009 entry->timer.function = lec_arp_expire_vcc;
2010 hlist_add_head(&entry->next, &priv->lec_no_forward);
2011 add_timer(&entry->timer);
2012 dump_arp_table(priv);
2013 goto out;
2014 }
2015 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",
2016 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2017 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2018 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2019 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2020 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2021 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2022 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2023 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2024 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2025 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2026 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2027 hlist_for_each_entry(entry,
2028 &priv->lec_arp_tables[i], next) {
2029 if (memcmp
2030 (ioc_data->atm_addr, entry->atm_addr,
2031 ATM_ESA_LEN) == 0) {
2032 pr_debug("LEC_ARP: Attaching data direct\n");
2033 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2034 entry->vcc ? entry->vcc->vci : 0,
2035 entry->recv_vcc ? entry->recv_vcc->
2036 vci : 0);
2037 found_entry = 1;
2038 del_timer(&entry->timer);
2039 entry->vcc = vcc;
2040 entry->old_push = old_push;
2041 if (entry->status == ESI_VC_PENDING) {
2042 if (priv->maximum_unknown_frame_count
2043 == 0)
2044 entry->status =
2045 ESI_FORWARD_DIRECT;
2046 else {
2047 entry->timestamp = jiffies;
2048 entry->status =
2049 ESI_FLUSH_PENDING;
2050#if 0
2051 send_to_lecd(priv, l_flush_xmt,
2052 NULL,
2053 entry->atm_addr,
2054 NULL);
2055#endif
2056 }
2057 } else {
2058 /*
2059 * They were forming a connection
2060 * to us, and we to them. Our
2061 * ATM address is numerically lower
2062 * than theirs, so we make connection
2063 * we formed into default VCC (8.1.11).
2064 * Connection they made gets torn
2065 * down. This might confuse some
2066 * clients. Can be changed if
2067 * someone reports trouble...
2068 */
2069 ;
2070 }
2071 }
2072 }
2073 }
2074 if (found_entry) {
2075 pr_debug("After vcc was added\n");
2076 dump_arp_table(priv);
2077 goto out;
2078 }
2079 /*
2080 * Not found, snatch address from first data packet that arrives
2081 * from this vcc
2082 */
2083 entry = make_entry(priv, bus_mac);
2084 if (!entry)
2085 goto out;
2086 entry->vcc = vcc;
2087 entry->old_push = old_push;
2088 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2089 eth_zero_addr(entry->mac_addr);
2090 entry->status = ESI_UNKNOWN;
2091 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2092 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2093 entry->timer.function = lec_arp_expire_vcc;
2094 add_timer(&entry->timer);
2095 pr_debug("After vcc was added\n");
2096 dump_arp_table(priv);
2097out:
2098 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2099}
2100
2101static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2102{
2103 unsigned long flags;
2104 struct lec_arp_table *entry;
2105 int i;
2106
2107 pr_debug("%lx\n", tran_id);
2108restart:
2109 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2110 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2111 hlist_for_each_entry(entry,
2112 &priv->lec_arp_tables[i], next) {
2113 if (entry->flush_tran_id == tran_id &&
2114 entry->status == ESI_FLUSH_PENDING) {
2115 struct sk_buff *skb;
2116 struct atm_vcc *vcc = entry->vcc;
2117
2118 lec_arp_hold(entry);
2119 spin_unlock_irqrestore(&priv->lec_arp_lock,
2120 flags);
2121 while ((skb = skb_dequeue(&entry->tx_wait)))
2122 lec_send(vcc, skb);
2123 entry->last_used = jiffies;
2124 entry->status = ESI_FORWARD_DIRECT;
2125 lec_arp_put(entry);
2126 pr_debug("LEC_ARP: Flushed\n");
2127 goto restart;
2128 }
2129 }
2130 }
2131 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2132 dump_arp_table(priv);
2133}
2134
2135static void
2136lec_set_flush_tran_id(struct lec_priv *priv,
2137 const unsigned char *atm_addr, unsigned long tran_id)
2138{
2139 unsigned long flags;
2140 struct lec_arp_table *entry;
2141 int i;
2142
2143 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2144 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2145 hlist_for_each_entry(entry,
2146 &priv->lec_arp_tables[i], next) {
2147 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2148 entry->flush_tran_id = tran_id;
2149 pr_debug("Set flush transaction id to %lx for %p\n",
2150 tran_id, entry);
2151 }
2152 }
2153 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2154}
2155
2156static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2157{
2158 unsigned long flags;
2159 unsigned char mac_addr[] = {
2160 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2161 };
2162 struct lec_arp_table *to_add;
2163 struct lec_vcc_priv *vpriv;
2164 int err = 0;
2165
2166 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2167 if (!vpriv)
2168 return -ENOMEM;
2169 vpriv->xoff = 0;
2170 vpriv->old_pop = vcc->pop;
2171 vcc->user_back = vpriv;
2172 vcc->pop = lec_pop;
2173 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2174 to_add = make_entry(priv, mac_addr);
2175 if (!to_add) {
2176 vcc->pop = vpriv->old_pop;
2177 kfree(vpriv);
2178 err = -ENOMEM;
2179 goto out;
2180 }
2181 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2182 to_add->status = ESI_FORWARD_DIRECT;
2183 to_add->flags |= LEC_PERMANENT_FLAG;
2184 to_add->vcc = vcc;
2185 to_add->old_push = vcc->push;
2186 vcc->push = lec_push;
2187 priv->mcast_vcc = vcc;
2188 lec_arp_add(priv, to_add);
2189out:
2190 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2191 return err;
2192}
2193
2194static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2195{
2196 unsigned long flags;
2197 struct hlist_node *next;
2198 struct lec_arp_table *entry;
2199 int i;
2200
2201 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2202 dump_arp_table(priv);
2203
2204 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2205
2206 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2207 hlist_for_each_entry_safe(entry, next,
2208 &priv->lec_arp_tables[i], next) {
2209 if (vcc == entry->vcc) {
2210 lec_arp_remove(priv, entry);
2211 lec_arp_put(entry);
2212 if (priv->mcast_vcc == vcc)
2213 priv->mcast_vcc = NULL;
2214 }
2215 }
2216 }
2217
2218 hlist_for_each_entry_safe(entry, next,
2219 &priv->lec_arp_empty_ones, next) {
2220 if (entry->vcc == vcc) {
2221 lec_arp_clear_vccs(entry);
2222 del_timer(&entry->timer);
2223 hlist_del(&entry->next);
2224 lec_arp_put(entry);
2225 }
2226 }
2227
2228 hlist_for_each_entry_safe(entry, next,
2229 &priv->lec_no_forward, next) {
2230 if (entry->recv_vcc == vcc) {
2231 lec_arp_clear_vccs(entry);
2232 del_timer(&entry->timer);
2233 hlist_del(&entry->next);
2234 lec_arp_put(entry);
2235 }
2236 }
2237
2238 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2239 if (entry->recv_vcc == vcc) {
2240 lec_arp_clear_vccs(entry);
2241 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2242 hlist_del(&entry->next);
2243 lec_arp_put(entry);
2244 }
2245 }
2246
2247 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2248 dump_arp_table(priv);
2249}
2250
2251static void
2252lec_arp_check_empties(struct lec_priv *priv,
2253 struct atm_vcc *vcc, struct sk_buff *skb)
2254{
2255 unsigned long flags;
2256 struct hlist_node *next;
2257 struct lec_arp_table *entry, *tmp;
2258 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2259 unsigned char *src = hdr->h_source;
2260
2261 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2262 hlist_for_each_entry_safe(entry, next,
2263 &priv->lec_arp_empty_ones, next) {
2264 if (vcc == entry->vcc) {
2265 del_timer(&entry->timer);
2266 ether_addr_copy(entry->mac_addr, src);
2267 entry->status = ESI_FORWARD_DIRECT;
2268 entry->last_used = jiffies;
2269 /* We might have got an entry */
2270 tmp = lec_arp_find(priv, src);
2271 if (tmp) {
2272 lec_arp_remove(priv, tmp);
2273 lec_arp_put(tmp);
2274 }
2275 hlist_del(&entry->next);
2276 lec_arp_add(priv, entry);
2277 goto out;
2278 }
2279 }
2280 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2281out:
2282 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2283}
2284
2285MODULE_LICENSE("GPL");