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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 if (dev_set_mtu(dev, mesg->content.config.mtu))
414 pr_info("%s: change_mtu to %d failed\n",
415 dev->name, mesg->content.config.mtu);
416 priv->is_proxy = mesg->content.config.is_proxy;
417 break;
418 case l_flush_tran_id:
419 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
420 mesg->content.normal.flag);
421 break;
422 case l_set_lecid:
423 priv->lecid =
424 (unsigned short)(0xffff & mesg->content.normal.flag);
425 break;
426 case l_should_bridge:
427#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
428 {
429 pr_debug("%s: bridge zeppelin asks about %pM\n",
430 dev->name, mesg->content.proxy.mac_addr);
431
432 if (br_fdb_test_addr_hook == NULL)
433 break;
434
435 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
436 /* hit from bridge table, send LE_ARP_RESPONSE */
437 struct sk_buff *skb2;
438 struct sock *sk;
439
440 pr_debug("%s: entry found, responding to zeppelin\n",
441 dev->name);
442 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
443 if (skb2 == NULL)
444 break;
445 skb2->len = sizeof(struct atmlec_msg);
446 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
447 atm_force_charge(priv->lecd, skb2->truesize);
448 sk = sk_atm(priv->lecd);
449 skb_queue_tail(&sk->sk_receive_queue, skb2);
450 sk->sk_data_ready(sk);
451 }
452 }
453#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
454 break;
455 default:
456 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
457 dev_kfree_skb(skb);
458 return -EINVAL;
459 }
460 dev_kfree_skb(skb);
461 return 0;
462}
463
464static void lec_atm_close(struct atm_vcc *vcc)
465{
466 struct sk_buff *skb;
467 struct net_device *dev = (struct net_device *)vcc->proto_data;
468 struct lec_priv *priv = netdev_priv(dev);
469
470 priv->lecd = NULL;
471 /* Do something needful? */
472
473 netif_stop_queue(dev);
474 lec_arp_destroy(priv);
475
476 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
477 pr_info("%s closing with messages pending\n", dev->name);
478 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
479 atm_return(vcc, skb->truesize);
480 dev_kfree_skb(skb);
481 }
482
483 pr_info("%s: Shut down!\n", dev->name);
484 module_put(THIS_MODULE);
485}
486
487static struct atmdev_ops lecdev_ops = {
488 .close = lec_atm_close,
489 .send = lec_atm_send
490};
491
492static struct atm_dev lecatm_dev = {
493 .ops = &lecdev_ops,
494 .type = "lec",
495 .number = 999, /* dummy device number */
496 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
497};
498
499/*
500 * LANE2: new argument struct sk_buff *data contains
501 * the LE_ARP based TLVs introduced in the LANE2 spec
502 */
503static int
504send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
505 const unsigned char *mac_addr, const unsigned char *atm_addr,
506 struct sk_buff *data)
507{
508 struct sock *sk;
509 struct sk_buff *skb;
510 struct atmlec_msg *mesg;
511
512 if (!priv || !priv->lecd)
513 return -1;
514 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
515 if (!skb)
516 return -1;
517 skb->len = sizeof(struct atmlec_msg);
518 mesg = (struct atmlec_msg *)skb->data;
519 memset(mesg, 0, sizeof(struct atmlec_msg));
520 mesg->type = type;
521 if (data != NULL)
522 mesg->sizeoftlvs = data->len;
523 if (mac_addr)
524 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
525 else
526 mesg->content.normal.targetless_le_arp = 1;
527 if (atm_addr)
528 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
529
530 atm_force_charge(priv->lecd, skb->truesize);
531 sk = sk_atm(priv->lecd);
532 skb_queue_tail(&sk->sk_receive_queue, skb);
533 sk->sk_data_ready(sk);
534
535 if (data != NULL) {
536 pr_debug("about to send %d bytes of data\n", data->len);
537 atm_force_charge(priv->lecd, data->truesize);
538 skb_queue_tail(&sk->sk_receive_queue, data);
539 sk->sk_data_ready(sk);
540 }
541
542 return 0;
543}
544
545/* shamelessly stolen from drivers/net/net_init.c */
546static int lec_change_mtu(struct net_device *dev, int new_mtu)
547{
548 if ((new_mtu < 68) || (new_mtu > 18190))
549 return -EINVAL;
550 dev->mtu = new_mtu;
551 return 0;
552}
553
554static void lec_set_multicast_list(struct net_device *dev)
555{
556 /*
557 * by default, all multicast frames arrive over the bus.
558 * eventually support selective multicast service
559 */
560}
561
562static const struct net_device_ops lec_netdev_ops = {
563 .ndo_open = lec_open,
564 .ndo_stop = lec_close,
565 .ndo_start_xmit = lec_start_xmit,
566 .ndo_change_mtu = lec_change_mtu,
567 .ndo_tx_timeout = lec_tx_timeout,
568 .ndo_set_rx_mode = lec_set_multicast_list,
569};
570
571static const unsigned char lec_ctrl_magic[] = {
572 0xff,
573 0x00,
574 0x01,
575 0x01
576};
577
578#define LEC_DATA_DIRECT_8023 2
579#define LEC_DATA_DIRECT_8025 3
580
581static int lec_is_data_direct(struct atm_vcc *vcc)
582{
583 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
584 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
585}
586
587static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
588{
589 unsigned long flags;
590 struct net_device *dev = (struct net_device *)vcc->proto_data;
591 struct lec_priv *priv = netdev_priv(dev);
592
593#if DUMP_PACKETS > 0
594 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
595 dev->name, vcc->vpi, vcc->vci);
596#endif
597 if (!skb) {
598 pr_debug("%s: null skb\n", dev->name);
599 lec_vcc_close(priv, vcc);
600 return;
601 }
602#if DUMP_PACKETS >= 2
603#define MAX_SKB_DUMP 99
604#elif DUMP_PACKETS >= 1
605#define MAX_SKB_DUMP 30
606#endif
607#if DUMP_PACKETS > 0
608 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
609 dev->name, skb->len, priv->lecid);
610 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
611 skb->data, min(MAX_SKB_DUMP, skb->len), true);
612#endif /* DUMP_PACKETS > 0 */
613 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
614 /* Control frame, to daemon */
615 struct sock *sk = sk_atm(vcc);
616
617 pr_debug("%s: To daemon\n", dev->name);
618 skb_queue_tail(&sk->sk_receive_queue, skb);
619 sk->sk_data_ready(sk);
620 } else { /* Data frame, queue to protocol handlers */
621 struct lec_arp_table *entry;
622 unsigned char *src, *dst;
623
624 atm_return(vcc, skb->truesize);
625 if (*(__be16 *) skb->data == htons(priv->lecid) ||
626 !priv->lecd || !(dev->flags & IFF_UP)) {
627 /*
628 * Probably looping back, or if lecd is missing,
629 * lecd has gone down
630 */
631 pr_debug("Ignoring frame...\n");
632 dev_kfree_skb(skb);
633 return;
634 }
635 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
636
637 /*
638 * If this is a Data Direct VCC, and the VCC does not match
639 * the LE_ARP cache entry, delete the LE_ARP cache entry.
640 */
641 spin_lock_irqsave(&priv->lec_arp_lock, flags);
642 if (lec_is_data_direct(vcc)) {
643 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
644 entry = lec_arp_find(priv, src);
645 if (entry && entry->vcc != vcc) {
646 lec_arp_remove(priv, entry);
647 lec_arp_put(entry);
648 }
649 }
650 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
651
652 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
653 !priv->is_proxy && /* Proxy wants all the packets */
654 memcmp(dst, dev->dev_addr, dev->addr_len)) {
655 dev_kfree_skb(skb);
656 return;
657 }
658 if (!hlist_empty(&priv->lec_arp_empty_ones))
659 lec_arp_check_empties(priv, vcc, skb);
660 skb_pull(skb, 2); /* skip lec_id */
661 skb->protocol = eth_type_trans(skb, dev);
662 dev->stats.rx_packets++;
663 dev->stats.rx_bytes += skb->len;
664 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
665 netif_rx(skb);
666 }
667}
668
669static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
670{
671 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
672 struct net_device *dev = skb->dev;
673
674 if (vpriv == NULL) {
675 pr_info("vpriv = NULL!?!?!?\n");
676 return;
677 }
678
679 vpriv->old_pop(vcc, skb);
680
681 if (vpriv->xoff && atm_may_send(vcc, 0)) {
682 vpriv->xoff = 0;
683 if (netif_running(dev) && netif_queue_stopped(dev))
684 netif_wake_queue(dev);
685 }
686}
687
688static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
689{
690 struct lec_vcc_priv *vpriv;
691 int bytes_left;
692 struct atmlec_ioc ioc_data;
693
694 /* Lecd must be up in this case */
695 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
696 if (bytes_left != 0)
697 pr_info("copy from user failed for %d bytes\n", bytes_left);
698 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
699 !dev_lec[ioc_data.dev_num])
700 return -EINVAL;
701 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
702 if (!vpriv)
703 return -ENOMEM;
704 vpriv->xoff = 0;
705 vpriv->old_pop = vcc->pop;
706 vcc->user_back = vpriv;
707 vcc->pop = lec_pop;
708 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
709 &ioc_data, vcc, vcc->push);
710 vcc->proto_data = dev_lec[ioc_data.dev_num];
711 vcc->push = lec_push;
712 return 0;
713}
714
715static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
716{
717 if (arg < 0 || arg >= MAX_LEC_ITF || !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 i = 0;
731 else
732 i = arg;
733 if (arg >= MAX_LEC_ITF)
734 return -EINVAL;
735 if (!dev_lec[i]) {
736 int size;
737
738 size = sizeof(struct lec_priv);
739 dev_lec[i] = alloc_etherdev(size);
740 if (!dev_lec[i])
741 return -ENOMEM;
742 dev_lec[i]->netdev_ops = &lec_netdev_ops;
743 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
744 if (register_netdev(dev_lec[i])) {
745 free_netdev(dev_lec[i]);
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 int i;
803
804 for (i = 0; i < ETH_ALEN; i++)
805 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
806 seq_printf(seq, " ");
807 for (i = 0; i < ATM_ESA_LEN; i++)
808 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
809 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
810 entry->flags & 0xffff);
811 if (entry->vcc)
812 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
813 else
814 seq_printf(seq, " ");
815 if (entry->recv_vcc) {
816 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
817 entry->recv_vcc->vci);
818 }
819 seq_putc(seq, '\n');
820}
821
822struct lec_state {
823 unsigned long flags;
824 struct lec_priv *locked;
825 struct hlist_node *node;
826 struct net_device *dev;
827 int itf;
828 int arp_table;
829 int misc_table;
830};
831
832static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
833 loff_t *l)
834{
835 struct hlist_node *e = state->node;
836 struct lec_arp_table *tmp;
837
838 if (!e)
839 e = tbl->first;
840 if (e == SEQ_START_TOKEN) {
841 e = tbl->first;
842 --*l;
843 }
844
845 tmp = container_of(e, struct lec_arp_table, next);
846
847 hlist_for_each_entry_from(tmp, next) {
848 if (--*l < 0)
849 break;
850 }
851 state->node = e;
852
853 return (*l < 0) ? state : NULL;
854}
855
856static void *lec_arp_walk(struct lec_state *state, loff_t *l,
857 struct lec_priv *priv)
858{
859 void *v = NULL;
860 int p;
861
862 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
863 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
864 if (v)
865 break;
866 }
867 state->arp_table = p;
868 return v;
869}
870
871static void *lec_misc_walk(struct lec_state *state, loff_t *l,
872 struct lec_priv *priv)
873{
874 struct hlist_head *lec_misc_tables[] = {
875 &priv->lec_arp_empty_ones,
876 &priv->lec_no_forward,
877 &priv->mcast_fwds
878 };
879 void *v = NULL;
880 int q;
881
882 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
883 v = lec_tbl_walk(state, lec_misc_tables[q], l);
884 if (v)
885 break;
886 }
887 state->misc_table = q;
888 return v;
889}
890
891static void *lec_priv_walk(struct lec_state *state, loff_t *l,
892 struct lec_priv *priv)
893{
894 if (!state->locked) {
895 state->locked = priv;
896 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
897 }
898 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
899 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
900 state->locked = NULL;
901 /* Partial state reset for the next time we get called */
902 state->arp_table = state->misc_table = 0;
903 }
904 return state->locked;
905}
906
907static void *lec_itf_walk(struct lec_state *state, loff_t *l)
908{
909 struct net_device *dev;
910 void *v;
911
912 dev = state->dev ? state->dev : dev_lec[state->itf];
913 v = (dev && netdev_priv(dev)) ?
914 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
915 if (!v && dev) {
916 dev_put(dev);
917 /* Partial state reset for the next time we get called */
918 dev = NULL;
919 }
920 state->dev = dev;
921 return v;
922}
923
924static void *lec_get_idx(struct lec_state *state, loff_t l)
925{
926 void *v = NULL;
927
928 for (; state->itf < MAX_LEC_ITF; state->itf++) {
929 v = lec_itf_walk(state, &l);
930 if (v)
931 break;
932 }
933 return v;
934}
935
936static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
937{
938 struct lec_state *state = seq->private;
939
940 state->itf = 0;
941 state->dev = NULL;
942 state->locked = NULL;
943 state->arp_table = 0;
944 state->misc_table = 0;
945 state->node = SEQ_START_TOKEN;
946
947 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
948}
949
950static void lec_seq_stop(struct seq_file *seq, void *v)
951{
952 struct lec_state *state = seq->private;
953
954 if (state->dev) {
955 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
956 state->flags);
957 dev_put(state->dev);
958 }
959}
960
961static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
962{
963 struct lec_state *state = seq->private;
964
965 v = lec_get_idx(state, 1);
966 *pos += !!PTR_ERR(v);
967 return v;
968}
969
970static int lec_seq_show(struct seq_file *seq, void *v)
971{
972 static const char lec_banner[] =
973 "Itf MAC ATM destination"
974 " Status Flags "
975 "VPI/VCI Recv VPI/VCI\n";
976
977 if (v == SEQ_START_TOKEN)
978 seq_puts(seq, lec_banner);
979 else {
980 struct lec_state *state = seq->private;
981 struct net_device *dev = state->dev;
982 struct lec_arp_table *entry = hlist_entry(state->node,
983 struct lec_arp_table,
984 next);
985
986 seq_printf(seq, "%s ", dev->name);
987 lec_info(seq, entry);
988 }
989 return 0;
990}
991
992static const struct seq_operations lec_seq_ops = {
993 .start = lec_seq_start,
994 .next = lec_seq_next,
995 .stop = lec_seq_stop,
996 .show = lec_seq_show,
997};
998
999static int lec_seq_open(struct inode *inode, struct file *file)
1000{
1001 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1002}
1003
1004static const struct file_operations lec_seq_fops = {
1005 .owner = THIS_MODULE,
1006 .open = lec_seq_open,
1007 .read = seq_read,
1008 .llseek = seq_lseek,
1009 .release = seq_release_private,
1010};
1011#endif
1012
1013static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1014{
1015 struct atm_vcc *vcc = ATM_SD(sock);
1016 int err = 0;
1017
1018 switch (cmd) {
1019 case ATMLEC_CTRL:
1020 case ATMLEC_MCAST:
1021 case ATMLEC_DATA:
1022 if (!capable(CAP_NET_ADMIN))
1023 return -EPERM;
1024 break;
1025 default:
1026 return -ENOIOCTLCMD;
1027 }
1028
1029 switch (cmd) {
1030 case ATMLEC_CTRL:
1031 err = lecd_attach(vcc, (int)arg);
1032 if (err >= 0)
1033 sock->state = SS_CONNECTED;
1034 break;
1035 case ATMLEC_MCAST:
1036 err = lec_mcast_attach(vcc, (int)arg);
1037 break;
1038 case ATMLEC_DATA:
1039 err = lec_vcc_attach(vcc, (void __user *)arg);
1040 break;
1041 }
1042
1043 return err;
1044}
1045
1046static struct atm_ioctl lane_ioctl_ops = {
1047 .owner = THIS_MODULE,
1048 .ioctl = lane_ioctl,
1049};
1050
1051static int __init lane_module_init(void)
1052{
1053#ifdef CONFIG_PROC_FS
1054 struct proc_dir_entry *p;
1055
1056 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1057 if (!p) {
1058 pr_err("Unable to initialize /proc/net/atm/lec\n");
1059 return -ENOMEM;
1060 }
1061#endif
1062
1063 register_atm_ioctl(&lane_ioctl_ops);
1064 pr_info("lec.c: initialized\n");
1065 return 0;
1066}
1067
1068static void __exit lane_module_cleanup(void)
1069{
1070 int i;
1071
1072 remove_proc_entry("lec", atm_proc_root);
1073
1074 deregister_atm_ioctl(&lane_ioctl_ops);
1075
1076 for (i = 0; i < MAX_LEC_ITF; i++) {
1077 if (dev_lec[i] != NULL) {
1078 unregister_netdev(dev_lec[i]);
1079 free_netdev(dev_lec[i]);
1080 dev_lec[i] = NULL;
1081 }
1082 }
1083}
1084
1085module_init(lane_module_init);
1086module_exit(lane_module_cleanup);
1087
1088/*
1089 * LANE2: 3.1.3, LE_RESOLVE.request
1090 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1091 * If sizeoftlvs == NULL the default TLVs associated with with this
1092 * lec will be used.
1093 * If dst_mac == NULL, targetless LE_ARP will be sent
1094 */
1095static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1096 u8 **tlvs, u32 *sizeoftlvs)
1097{
1098 unsigned long flags;
1099 struct lec_priv *priv = netdev_priv(dev);
1100 struct lec_arp_table *table;
1101 struct sk_buff *skb;
1102 int retval;
1103
1104 if (force == 0) {
1105 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1106 table = lec_arp_find(priv, dst_mac);
1107 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1108 if (table == NULL)
1109 return -1;
1110
1111 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1112 if (*tlvs == NULL)
1113 return -1;
1114
1115 *sizeoftlvs = table->sizeoftlvs;
1116
1117 return 0;
1118 }
1119
1120 if (sizeoftlvs == NULL)
1121 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1122
1123 else {
1124 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1125 if (skb == NULL)
1126 return -1;
1127 skb->len = *sizeoftlvs;
1128 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1129 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1130 }
1131 return retval;
1132}
1133
1134/*
1135 * LANE2: 3.1.4, LE_ASSOCIATE.request
1136 * Associate the *tlvs with the *lan_dst address.
1137 * Will overwrite any previous association
1138 * Returns 1 for success, 0 for failure (out of memory)
1139 *
1140 */
1141static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1142 const u8 *tlvs, u32 sizeoftlvs)
1143{
1144 int retval;
1145 struct sk_buff *skb;
1146 struct lec_priv *priv = netdev_priv(dev);
1147
1148 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1149 return 0; /* not our mac address */
1150
1151 kfree(priv->tlvs); /* NULL if there was no previous association */
1152
1153 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1154 if (priv->tlvs == NULL)
1155 return 0;
1156 priv->sizeoftlvs = sizeoftlvs;
1157
1158 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1159 if (skb == NULL)
1160 return 0;
1161 skb->len = sizeoftlvs;
1162 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1163 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1164 if (retval != 0)
1165 pr_info("lec.c: lane2_associate_req() failed\n");
1166 /*
1167 * If the previous association has changed we must
1168 * somehow notify other LANE entities about the change
1169 */
1170 return 1;
1171}
1172
1173/*
1174 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1175 *
1176 */
1177static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1178 const u8 *tlvs, u32 sizeoftlvs)
1179{
1180#if 0
1181 int i = 0;
1182#endif
1183 struct lec_priv *priv = netdev_priv(dev);
1184#if 0 /*
1185 * Why have the TLVs in LE_ARP entries
1186 * since we do not use them? When you
1187 * uncomment this code, make sure the
1188 * TLVs get freed when entry is killed
1189 */
1190 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1191
1192 if (entry == NULL)
1193 return; /* should not happen */
1194
1195 kfree(entry->tlvs);
1196
1197 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1198 if (entry->tlvs == NULL)
1199 return;
1200 entry->sizeoftlvs = sizeoftlvs;
1201#endif
1202#if 0
1203 pr_info("\n");
1204 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1205 while (i < sizeoftlvs)
1206 pr_cont("%02x ", tlvs[i++]);
1207
1208 pr_cont("\n");
1209#endif
1210
1211 /* tell MPOA about the TLVs we saw */
1212 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1213 priv->lane2_ops->associate_indicator(dev, mac_addr,
1214 tlvs, sizeoftlvs);
1215 }
1216}
1217
1218/*
1219 * Here starts what used to lec_arpc.c
1220 *
1221 * lec_arpc.c was added here when making
1222 * lane client modular. October 1997
1223 */
1224
1225#include <linux/types.h>
1226#include <linux/timer.h>
1227#include <linux/param.h>
1228#include <linux/atomic.h>
1229#include <linux/inetdevice.h>
1230#include <net/route.h>
1231
1232#if 0
1233#define pr_debug(format, args...)
1234/*
1235 #define pr_debug printk
1236*/
1237#endif
1238#define DEBUG_ARP_TABLE 0
1239
1240#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1241
1242static void lec_arp_check_expire(struct work_struct *work);
1243static void lec_arp_expire_arp(unsigned long data);
1244
1245/*
1246 * Arp table funcs
1247 */
1248
1249#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1250
1251/*
1252 * Initialization of arp-cache
1253 */
1254static void lec_arp_init(struct lec_priv *priv)
1255{
1256 unsigned short i;
1257
1258 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1259 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1260 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1261 INIT_HLIST_HEAD(&priv->lec_no_forward);
1262 INIT_HLIST_HEAD(&priv->mcast_fwds);
1263 spin_lock_init(&priv->lec_arp_lock);
1264 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1265 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1266}
1267
1268static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1269{
1270 if (entry->vcc) {
1271 struct atm_vcc *vcc = entry->vcc;
1272 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1273 struct net_device *dev = (struct net_device *)vcc->proto_data;
1274
1275 vcc->pop = vpriv->old_pop;
1276 if (vpriv->xoff)
1277 netif_wake_queue(dev);
1278 kfree(vpriv);
1279 vcc->user_back = NULL;
1280 vcc->push = entry->old_push;
1281 vcc_release_async(vcc, -EPIPE);
1282 entry->vcc = NULL;
1283 }
1284 if (entry->recv_vcc) {
1285 entry->recv_vcc->push = entry->old_recv_push;
1286 vcc_release_async(entry->recv_vcc, -EPIPE);
1287 entry->recv_vcc = NULL;
1288 }
1289}
1290
1291/*
1292 * Insert entry to lec_arp_table
1293 * LANE2: Add to the end of the list to satisfy 8.1.13
1294 */
1295static inline void
1296lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1297{
1298 struct hlist_head *tmp;
1299
1300 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1301 hlist_add_head(&entry->next, tmp);
1302
1303 pr_debug("Added entry:%pM\n", entry->mac_addr);
1304}
1305
1306/*
1307 * Remove entry from lec_arp_table
1308 */
1309static int
1310lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1311{
1312 struct lec_arp_table *entry;
1313 int i, remove_vcc = 1;
1314
1315 if (!to_remove)
1316 return -1;
1317
1318 hlist_del(&to_remove->next);
1319 del_timer(&to_remove->timer);
1320
1321 /*
1322 * If this is the only MAC connected to this VCC,
1323 * also tear down the VCC
1324 */
1325 if (to_remove->status >= ESI_FLUSH_PENDING) {
1326 /*
1327 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1328 */
1329 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1330 hlist_for_each_entry(entry,
1331 &priv->lec_arp_tables[i], next) {
1332 if (memcmp(to_remove->atm_addr,
1333 entry->atm_addr, ATM_ESA_LEN) == 0) {
1334 remove_vcc = 0;
1335 break;
1336 }
1337 }
1338 }
1339 if (remove_vcc)
1340 lec_arp_clear_vccs(to_remove);
1341 }
1342 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1343
1344 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1345 return 0;
1346}
1347
1348#if DEBUG_ARP_TABLE
1349static const char *get_status_string(unsigned char st)
1350{
1351 switch (st) {
1352 case ESI_UNKNOWN:
1353 return "ESI_UNKNOWN";
1354 case ESI_ARP_PENDING:
1355 return "ESI_ARP_PENDING";
1356 case ESI_VC_PENDING:
1357 return "ESI_VC_PENDING";
1358 case ESI_FLUSH_PENDING:
1359 return "ESI_FLUSH_PENDING";
1360 case ESI_FORWARD_DIRECT:
1361 return "ESI_FORWARD_DIRECT";
1362 }
1363 return "<UNKNOWN>";
1364}
1365
1366static void dump_arp_table(struct lec_priv *priv)
1367{
1368 struct lec_arp_table *rulla;
1369 char buf[256];
1370 int i, j, offset;
1371
1372 pr_info("Dump %p:\n", priv);
1373 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1374 hlist_for_each_entry(rulla,
1375 &priv->lec_arp_tables[i], next) {
1376 offset = 0;
1377 offset += sprintf(buf, "%d: %p\n", i, rulla);
1378 offset += sprintf(buf + offset, "Mac: %pM",
1379 rulla->mac_addr);
1380 offset += sprintf(buf + offset, " Atm:");
1381 for (j = 0; j < ATM_ESA_LEN; j++) {
1382 offset += sprintf(buf + offset,
1383 "%2.2x ",
1384 rulla->atm_addr[j] & 0xff);
1385 }
1386 offset += sprintf(buf + offset,
1387 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1388 rulla->vcc ? rulla->vcc->vpi : 0,
1389 rulla->vcc ? rulla->vcc->vci : 0,
1390 rulla->recv_vcc ? rulla->recv_vcc->
1391 vpi : 0,
1392 rulla->recv_vcc ? rulla->recv_vcc->
1393 vci : 0, rulla->last_used,
1394 rulla->timestamp, rulla->no_tries);
1395 offset +=
1396 sprintf(buf + offset,
1397 "Flags:%x, Packets_flooded:%x, Status: %s ",
1398 rulla->flags, rulla->packets_flooded,
1399 get_status_string(rulla->status));
1400 pr_info("%s\n", buf);
1401 }
1402 }
1403
1404 if (!hlist_empty(&priv->lec_no_forward))
1405 pr_info("No forward\n");
1406 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1407 offset = 0;
1408 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1409 offset += sprintf(buf + offset, " Atm:");
1410 for (j = 0; j < ATM_ESA_LEN; j++) {
1411 offset += sprintf(buf + offset, "%2.2x ",
1412 rulla->atm_addr[j] & 0xff);
1413 }
1414 offset += sprintf(buf + offset,
1415 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1416 rulla->vcc ? rulla->vcc->vpi : 0,
1417 rulla->vcc ? rulla->vcc->vci : 0,
1418 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1419 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1420 rulla->last_used,
1421 rulla->timestamp, rulla->no_tries);
1422 offset += sprintf(buf + offset,
1423 "Flags:%x, Packets_flooded:%x, Status: %s ",
1424 rulla->flags, rulla->packets_flooded,
1425 get_status_string(rulla->status));
1426 pr_info("%s\n", buf);
1427 }
1428
1429 if (!hlist_empty(&priv->lec_arp_empty_ones))
1430 pr_info("Empty ones\n");
1431 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1432 offset = 0;
1433 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1434 offset += sprintf(buf + offset, " Atm:");
1435 for (j = 0; j < ATM_ESA_LEN; j++) {
1436 offset += sprintf(buf + offset, "%2.2x ",
1437 rulla->atm_addr[j] & 0xff);
1438 }
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", buf);
1452 }
1453
1454 if (!hlist_empty(&priv->mcast_fwds))
1455 pr_info("Multicast Forward VCCs\n");
1456 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1457 offset = 0;
1458 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1459 offset += sprintf(buf + offset, " Atm:");
1460 for (j = 0; j < ATM_ESA_LEN; j++) {
1461 offset += sprintf(buf + offset, "%2.2x ",
1462 rulla->atm_addr[j] & 0xff);
1463 }
1464 offset += sprintf(buf + offset,
1465 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1466 rulla->vcc ? rulla->vcc->vpi : 0,
1467 rulla->vcc ? rulla->vcc->vci : 0,
1468 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1469 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1470 rulla->last_used,
1471 rulla->timestamp, rulla->no_tries);
1472 offset += sprintf(buf + offset,
1473 "Flags:%x, Packets_flooded:%x, Status: %s ",
1474 rulla->flags, rulla->packets_flooded,
1475 get_status_string(rulla->status));
1476 pr_info("%s\n", buf);
1477 }
1478
1479}
1480#else
1481#define dump_arp_table(priv) do { } while (0)
1482#endif
1483
1484/*
1485 * Destruction of arp-cache
1486 */
1487static void lec_arp_destroy(struct lec_priv *priv)
1488{
1489 unsigned long flags;
1490 struct hlist_node *next;
1491 struct lec_arp_table *entry;
1492 int i;
1493
1494 cancel_delayed_work_sync(&priv->lec_arp_work);
1495
1496 /*
1497 * Remove all entries
1498 */
1499
1500 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1501 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1502 hlist_for_each_entry_safe(entry, next,
1503 &priv->lec_arp_tables[i], next) {
1504 lec_arp_remove(priv, entry);
1505 lec_arp_put(entry);
1506 }
1507 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1508 }
1509
1510 hlist_for_each_entry_safe(entry, next,
1511 &priv->lec_arp_empty_ones, next) {
1512 del_timer_sync(&entry->timer);
1513 lec_arp_clear_vccs(entry);
1514 hlist_del(&entry->next);
1515 lec_arp_put(entry);
1516 }
1517 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1518
1519 hlist_for_each_entry_safe(entry, next,
1520 &priv->lec_no_forward, next) {
1521 del_timer_sync(&entry->timer);
1522 lec_arp_clear_vccs(entry);
1523 hlist_del(&entry->next);
1524 lec_arp_put(entry);
1525 }
1526 INIT_HLIST_HEAD(&priv->lec_no_forward);
1527
1528 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1529 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1530 lec_arp_clear_vccs(entry);
1531 hlist_del(&entry->next);
1532 lec_arp_put(entry);
1533 }
1534 INIT_HLIST_HEAD(&priv->mcast_fwds);
1535 priv->mcast_vcc = NULL;
1536 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1537}
1538
1539/*
1540 * Find entry by mac_address
1541 */
1542static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1543 const unsigned char *mac_addr)
1544{
1545 struct hlist_head *head;
1546 struct lec_arp_table *entry;
1547
1548 pr_debug("%pM\n", mac_addr);
1549
1550 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1551 hlist_for_each_entry(entry, head, next) {
1552 if (ether_addr_equal(mac_addr, entry->mac_addr))
1553 return entry;
1554 }
1555 return NULL;
1556}
1557
1558static struct lec_arp_table *make_entry(struct lec_priv *priv,
1559 const unsigned char *mac_addr)
1560{
1561 struct lec_arp_table *to_return;
1562
1563 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1564 if (!to_return) {
1565 pr_info("LEC: Arp entry kmalloc failed\n");
1566 return NULL;
1567 }
1568 ether_addr_copy(to_return->mac_addr, mac_addr);
1569 INIT_HLIST_NODE(&to_return->next);
1570 setup_timer(&to_return->timer, lec_arp_expire_arp,
1571 (unsigned long)to_return);
1572 to_return->last_used = jiffies;
1573 to_return->priv = priv;
1574 skb_queue_head_init(&to_return->tx_wait);
1575 atomic_set(&to_return->usage, 1);
1576 return to_return;
1577}
1578
1579/* Arp sent timer expired */
1580static void lec_arp_expire_arp(unsigned long data)
1581{
1582 struct lec_arp_table *entry;
1583
1584 entry = (struct lec_arp_table *)data;
1585
1586 pr_debug("\n");
1587 if (entry->status == ESI_ARP_PENDING) {
1588 if (entry->no_tries <= entry->priv->max_retry_count) {
1589 if (entry->is_rdesc)
1590 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1591 entry->mac_addr, NULL, NULL);
1592 else
1593 send_to_lecd(entry->priv, l_arp_xmt,
1594 entry->mac_addr, NULL, NULL);
1595 entry->no_tries++;
1596 }
1597 mod_timer(&entry->timer, jiffies + (1 * HZ));
1598 }
1599}
1600
1601/* Unknown/unused vcc expire, remove associated entry */
1602static void lec_arp_expire_vcc(unsigned long data)
1603{
1604 unsigned long flags;
1605 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1606 struct lec_priv *priv = to_remove->priv;
1607
1608 del_timer(&to_remove->timer);
1609
1610 pr_debug("%p %p: vpi:%d vci:%d\n",
1611 to_remove, priv,
1612 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1613 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1614
1615 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1616 hlist_del(&to_remove->next);
1617 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1618
1619 lec_arp_clear_vccs(to_remove);
1620 lec_arp_put(to_remove);
1621}
1622
1623static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1624 unsigned long now,
1625 struct lec_priv *priv)
1626{
1627 unsigned long time_to_check;
1628
1629 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1630 time_to_check = priv->forward_delay_time;
1631 else
1632 time_to_check = priv->aging_time;
1633
1634 pr_debug("About to expire: %lx - %lx > %lx\n",
1635 now, entry->last_used, time_to_check);
1636 if (time_after(now, entry->last_used + time_to_check) &&
1637 !(entry->flags & LEC_PERMANENT_FLAG) &&
1638 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1639 /* Remove entry */
1640 pr_debug("Entry timed out\n");
1641 lec_arp_remove(priv, entry);
1642 lec_arp_put(entry);
1643 } else {
1644 /* Something else */
1645 if ((entry->status == ESI_VC_PENDING ||
1646 entry->status == ESI_ARP_PENDING) &&
1647 time_after_eq(now, entry->timestamp +
1648 priv->max_unknown_frame_time)) {
1649 entry->timestamp = jiffies;
1650 entry->packets_flooded = 0;
1651 if (entry->status == ESI_VC_PENDING)
1652 send_to_lecd(priv, l_svc_setup,
1653 entry->mac_addr,
1654 entry->atm_addr,
1655 NULL);
1656 }
1657 if (entry->status == ESI_FLUSH_PENDING &&
1658 time_after_eq(now, entry->timestamp +
1659 priv->path_switching_delay)) {
1660 lec_arp_hold(entry);
1661 return true;
1662 }
1663 }
1664
1665 return false;
1666}
1667/*
1668 * Expire entries.
1669 * 1. Re-set timer
1670 * 2. For each entry, delete entries that have aged past the age limit.
1671 * 3. For each entry, depending on the status of the entry, perform
1672 * the following maintenance.
1673 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1674 * tick_count is above the max_unknown_frame_time, clear
1675 * the tick_count to zero and clear the packets_flooded counter
1676 * to zero. This supports the packet rate limit per address
1677 * while flooding unknowns.
1678 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1679 * than or equal to the path_switching_delay, change the status
1680 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1681 * regardless of the progress of the flush protocol.
1682 */
1683static void lec_arp_check_expire(struct work_struct *work)
1684{
1685 unsigned long flags;
1686 struct lec_priv *priv =
1687 container_of(work, struct lec_priv, lec_arp_work.work);
1688 struct hlist_node *next;
1689 struct lec_arp_table *entry;
1690 unsigned long now;
1691 int i;
1692
1693 pr_debug("%p\n", priv);
1694 now = jiffies;
1695restart:
1696 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1697 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1698 hlist_for_each_entry_safe(entry, next,
1699 &priv->lec_arp_tables[i], next) {
1700 if (__lec_arp_check_expire(entry, now, priv)) {
1701 struct sk_buff *skb;
1702 struct atm_vcc *vcc = entry->vcc;
1703
1704 spin_unlock_irqrestore(&priv->lec_arp_lock,
1705 flags);
1706 while ((skb = skb_dequeue(&entry->tx_wait)))
1707 lec_send(vcc, skb);
1708 entry->last_used = jiffies;
1709 entry->status = ESI_FORWARD_DIRECT;
1710 lec_arp_put(entry);
1711
1712 goto restart;
1713 }
1714 }
1715 }
1716 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1717
1718 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1719}
1720
1721/*
1722 * Try to find vcc where mac_address is attached.
1723 *
1724 */
1725static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1726 const unsigned char *mac_to_find,
1727 int is_rdesc,
1728 struct lec_arp_table **ret_entry)
1729{
1730 unsigned long flags;
1731 struct lec_arp_table *entry;
1732 struct atm_vcc *found;
1733
1734 if (mac_to_find[0] & 0x01) {
1735 switch (priv->lane_version) {
1736 case 1:
1737 return priv->mcast_vcc;
1738 case 2: /* LANE2 wants arp for multicast addresses */
1739 if (ether_addr_equal(mac_to_find, bus_mac))
1740 return priv->mcast_vcc;
1741 break;
1742 default:
1743 break;
1744 }
1745 }
1746
1747 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1748 entry = lec_arp_find(priv, mac_to_find);
1749
1750 if (entry) {
1751 if (entry->status == ESI_FORWARD_DIRECT) {
1752 /* Connection Ok */
1753 entry->last_used = jiffies;
1754 lec_arp_hold(entry);
1755 *ret_entry = entry;
1756 found = entry->vcc;
1757 goto out;
1758 }
1759 /*
1760 * If the LE_ARP cache entry is still pending, reset count to 0
1761 * so another LE_ARP request can be made for this frame.
1762 */
1763 if (entry->status == ESI_ARP_PENDING)
1764 entry->no_tries = 0;
1765 /*
1766 * Data direct VC not yet set up, check to see if the unknown
1767 * frame count is greater than the limit. If the limit has
1768 * not been reached, allow the caller to send packet to
1769 * BUS.
1770 */
1771 if (entry->status != ESI_FLUSH_PENDING &&
1772 entry->packets_flooded <
1773 priv->maximum_unknown_frame_count) {
1774 entry->packets_flooded++;
1775 pr_debug("Flooding..\n");
1776 found = priv->mcast_vcc;
1777 goto out;
1778 }
1779 /*
1780 * We got here because entry->status == ESI_FLUSH_PENDING
1781 * or BUS flood limit was reached for an entry which is
1782 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1783 */
1784 lec_arp_hold(entry);
1785 *ret_entry = entry;
1786 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1787 entry->vcc);
1788 found = NULL;
1789 } else {
1790 /* No matching entry was found */
1791 entry = make_entry(priv, mac_to_find);
1792 pr_debug("Making entry\n");
1793 if (!entry) {
1794 found = priv->mcast_vcc;
1795 goto out;
1796 }
1797 lec_arp_add(priv, entry);
1798 /* We want arp-request(s) to be sent */
1799 entry->packets_flooded = 1;
1800 entry->status = ESI_ARP_PENDING;
1801 entry->no_tries = 1;
1802 entry->last_used = entry->timestamp = jiffies;
1803 entry->is_rdesc = is_rdesc;
1804 if (entry->is_rdesc)
1805 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1806 NULL);
1807 else
1808 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1809 entry->timer.expires = jiffies + (1 * HZ);
1810 entry->timer.function = lec_arp_expire_arp;
1811 add_timer(&entry->timer);
1812 found = priv->mcast_vcc;
1813 }
1814
1815out:
1816 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1817 return found;
1818}
1819
1820static int
1821lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1822 unsigned long permanent)
1823{
1824 unsigned long flags;
1825 struct hlist_node *next;
1826 struct lec_arp_table *entry;
1827 int i;
1828
1829 pr_debug("\n");
1830 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1831 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1832 hlist_for_each_entry_safe(entry, next,
1833 &priv->lec_arp_tables[i], next) {
1834 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1835 (permanent ||
1836 !(entry->flags & LEC_PERMANENT_FLAG))) {
1837 lec_arp_remove(priv, entry);
1838 lec_arp_put(entry);
1839 }
1840 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1841 return 0;
1842 }
1843 }
1844 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1845 return -1;
1846}
1847
1848/*
1849 * Notifies: Response to arp_request (atm_addr != NULL)
1850 */
1851static void
1852lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1853 const unsigned char *atm_addr, unsigned long remoteflag,
1854 unsigned int targetless_le_arp)
1855{
1856 unsigned long flags;
1857 struct hlist_node *next;
1858 struct lec_arp_table *entry, *tmp;
1859 int i;
1860
1861 pr_debug("%smac:%pM\n",
1862 (targetless_le_arp) ? "targetless " : "", mac_addr);
1863
1864 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1865 entry = lec_arp_find(priv, mac_addr);
1866 if (entry == NULL && targetless_le_arp)
1867 goto out; /*
1868 * LANE2: ignore targetless LE_ARPs for which
1869 * we have no entry in the cache. 7.1.30
1870 */
1871 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1872 hlist_for_each_entry_safe(entry, next,
1873 &priv->lec_arp_empty_ones, next) {
1874 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1875 hlist_del(&entry->next);
1876 del_timer(&entry->timer);
1877 tmp = lec_arp_find(priv, mac_addr);
1878 if (tmp) {
1879 del_timer(&tmp->timer);
1880 tmp->status = ESI_FORWARD_DIRECT;
1881 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1882 tmp->vcc = entry->vcc;
1883 tmp->old_push = entry->old_push;
1884 tmp->last_used = jiffies;
1885 del_timer(&entry->timer);
1886 lec_arp_put(entry);
1887 entry = tmp;
1888 } else {
1889 entry->status = ESI_FORWARD_DIRECT;
1890 ether_addr_copy(entry->mac_addr,
1891 mac_addr);
1892 entry->last_used = jiffies;
1893 lec_arp_add(priv, entry);
1894 }
1895 if (remoteflag)
1896 entry->flags |= LEC_REMOTE_FLAG;
1897 else
1898 entry->flags &= ~LEC_REMOTE_FLAG;
1899 pr_debug("After update\n");
1900 dump_arp_table(priv);
1901 goto out;
1902 }
1903 }
1904 }
1905
1906 entry = lec_arp_find(priv, mac_addr);
1907 if (!entry) {
1908 entry = make_entry(priv, mac_addr);
1909 if (!entry)
1910 goto out;
1911 entry->status = ESI_UNKNOWN;
1912 lec_arp_add(priv, entry);
1913 /* Temporary, changes before end of function */
1914 }
1915 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1916 del_timer(&entry->timer);
1917 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1918 hlist_for_each_entry(tmp,
1919 &priv->lec_arp_tables[i], next) {
1920 if (entry != tmp &&
1921 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1922 /* Vcc to this host exists */
1923 if (tmp->status > ESI_VC_PENDING) {
1924 /*
1925 * ESI_FLUSH_PENDING,
1926 * ESI_FORWARD_DIRECT
1927 */
1928 entry->vcc = tmp->vcc;
1929 entry->old_push = tmp->old_push;
1930 }
1931 entry->status = tmp->status;
1932 break;
1933 }
1934 }
1935 }
1936 if (remoteflag)
1937 entry->flags |= LEC_REMOTE_FLAG;
1938 else
1939 entry->flags &= ~LEC_REMOTE_FLAG;
1940 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1941 entry->status = ESI_VC_PENDING;
1942 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1943 }
1944 pr_debug("After update2\n");
1945 dump_arp_table(priv);
1946out:
1947 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1948}
1949
1950/*
1951 * Notifies: Vcc setup ready
1952 */
1953static void
1954lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1955 struct atm_vcc *vcc,
1956 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1957{
1958 unsigned long flags;
1959 struct lec_arp_table *entry;
1960 int i, found_entry = 0;
1961
1962 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1963 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
1964 if (ioc_data->receive == 2) {
1965 pr_debug("LEC_ARP: Attaching mcast forward\n");
1966#if 0
1967 entry = lec_arp_find(priv, bus_mac);
1968 if (!entry) {
1969 pr_info("LEC_ARP: Multicast entry not found!\n");
1970 goto out;
1971 }
1972 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1973 entry->recv_vcc = vcc;
1974 entry->old_recv_push = old_push;
1975#endif
1976 entry = make_entry(priv, bus_mac);
1977 if (entry == NULL)
1978 goto out;
1979 del_timer(&entry->timer);
1980 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1981 entry->recv_vcc = vcc;
1982 entry->old_recv_push = old_push;
1983 hlist_add_head(&entry->next, &priv->mcast_fwds);
1984 goto out;
1985 } else if (ioc_data->receive == 1) {
1986 /*
1987 * Vcc which we don't want to make default vcc,
1988 * attach it anyway.
1989 */
1990 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",
1991 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1992 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1993 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1994 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1995 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1996 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1997 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1998 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1999 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2000 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2001 entry = make_entry(priv, bus_mac);
2002 if (entry == NULL)
2003 goto out;
2004 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2005 memset(entry->mac_addr, 0, ETH_ALEN);
2006 entry->recv_vcc = vcc;
2007 entry->old_recv_push = old_push;
2008 entry->status = ESI_UNKNOWN;
2009 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2010 entry->timer.function = lec_arp_expire_vcc;
2011 hlist_add_head(&entry->next, &priv->lec_no_forward);
2012 add_timer(&entry->timer);
2013 dump_arp_table(priv);
2014 goto out;
2015 }
2016 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",
2017 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2018 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2019 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2020 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2021 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2022 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2023 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2024 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2025 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2026 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2027 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2028 hlist_for_each_entry(entry,
2029 &priv->lec_arp_tables[i], next) {
2030 if (memcmp
2031 (ioc_data->atm_addr, entry->atm_addr,
2032 ATM_ESA_LEN) == 0) {
2033 pr_debug("LEC_ARP: Attaching data direct\n");
2034 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2035 entry->vcc ? entry->vcc->vci : 0,
2036 entry->recv_vcc ? entry->recv_vcc->
2037 vci : 0);
2038 found_entry = 1;
2039 del_timer(&entry->timer);
2040 entry->vcc = vcc;
2041 entry->old_push = old_push;
2042 if (entry->status == ESI_VC_PENDING) {
2043 if (priv->maximum_unknown_frame_count
2044 == 0)
2045 entry->status =
2046 ESI_FORWARD_DIRECT;
2047 else {
2048 entry->timestamp = jiffies;
2049 entry->status =
2050 ESI_FLUSH_PENDING;
2051#if 0
2052 send_to_lecd(priv, l_flush_xmt,
2053 NULL,
2054 entry->atm_addr,
2055 NULL);
2056#endif
2057 }
2058 } else {
2059 /*
2060 * They were forming a connection
2061 * to us, and we to them. Our
2062 * ATM address is numerically lower
2063 * than theirs, so we make connection
2064 * we formed into default VCC (8.1.11).
2065 * Connection they made gets torn
2066 * down. This might confuse some
2067 * clients. Can be changed if
2068 * someone reports trouble...
2069 */
2070 ;
2071 }
2072 }
2073 }
2074 }
2075 if (found_entry) {
2076 pr_debug("After vcc was added\n");
2077 dump_arp_table(priv);
2078 goto out;
2079 }
2080 /*
2081 * Not found, snatch address from first data packet that arrives
2082 * from this vcc
2083 */
2084 entry = make_entry(priv, bus_mac);
2085 if (!entry)
2086 goto out;
2087 entry->vcc = vcc;
2088 entry->old_push = old_push;
2089 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2090 memset(entry->mac_addr, 0, ETH_ALEN);
2091 entry->status = ESI_UNKNOWN;
2092 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2093 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2094 entry->timer.function = lec_arp_expire_vcc;
2095 add_timer(&entry->timer);
2096 pr_debug("After vcc was added\n");
2097 dump_arp_table(priv);
2098out:
2099 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2100}
2101
2102static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2103{
2104 unsigned long flags;
2105 struct lec_arp_table *entry;
2106 int i;
2107
2108 pr_debug("%lx\n", tran_id);
2109restart:
2110 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2111 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2112 hlist_for_each_entry(entry,
2113 &priv->lec_arp_tables[i], next) {
2114 if (entry->flush_tran_id == tran_id &&
2115 entry->status == ESI_FLUSH_PENDING) {
2116 struct sk_buff *skb;
2117 struct atm_vcc *vcc = entry->vcc;
2118
2119 lec_arp_hold(entry);
2120 spin_unlock_irqrestore(&priv->lec_arp_lock,
2121 flags);
2122 while ((skb = skb_dequeue(&entry->tx_wait)))
2123 lec_send(vcc, skb);
2124 entry->last_used = jiffies;
2125 entry->status = ESI_FORWARD_DIRECT;
2126 lec_arp_put(entry);
2127 pr_debug("LEC_ARP: Flushed\n");
2128 goto restart;
2129 }
2130 }
2131 }
2132 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2133 dump_arp_table(priv);
2134}
2135
2136static void
2137lec_set_flush_tran_id(struct lec_priv *priv,
2138 const unsigned char *atm_addr, unsigned long tran_id)
2139{
2140 unsigned long flags;
2141 struct lec_arp_table *entry;
2142 int i;
2143
2144 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2145 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2146 hlist_for_each_entry(entry,
2147 &priv->lec_arp_tables[i], next) {
2148 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2149 entry->flush_tran_id = tran_id;
2150 pr_debug("Set flush transaction id to %lx for %p\n",
2151 tran_id, entry);
2152 }
2153 }
2154 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2155}
2156
2157static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2158{
2159 unsigned long flags;
2160 unsigned char mac_addr[] = {
2161 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2162 };
2163 struct lec_arp_table *to_add;
2164 struct lec_vcc_priv *vpriv;
2165 int err = 0;
2166
2167 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2168 if (!vpriv)
2169 return -ENOMEM;
2170 vpriv->xoff = 0;
2171 vpriv->old_pop = vcc->pop;
2172 vcc->user_back = vpriv;
2173 vcc->pop = lec_pop;
2174 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2175 to_add = make_entry(priv, mac_addr);
2176 if (!to_add) {
2177 vcc->pop = vpriv->old_pop;
2178 kfree(vpriv);
2179 err = -ENOMEM;
2180 goto out;
2181 }
2182 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2183 to_add->status = ESI_FORWARD_DIRECT;
2184 to_add->flags |= LEC_PERMANENT_FLAG;
2185 to_add->vcc = vcc;
2186 to_add->old_push = vcc->push;
2187 vcc->push = lec_push;
2188 priv->mcast_vcc = vcc;
2189 lec_arp_add(priv, to_add);
2190out:
2191 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2192 return err;
2193}
2194
2195static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2196{
2197 unsigned long flags;
2198 struct hlist_node *next;
2199 struct lec_arp_table *entry;
2200 int i;
2201
2202 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2203 dump_arp_table(priv);
2204
2205 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2206
2207 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2208 hlist_for_each_entry_safe(entry, next,
2209 &priv->lec_arp_tables[i], next) {
2210 if (vcc == entry->vcc) {
2211 lec_arp_remove(priv, entry);
2212 lec_arp_put(entry);
2213 if (priv->mcast_vcc == vcc)
2214 priv->mcast_vcc = NULL;
2215 }
2216 }
2217 }
2218
2219 hlist_for_each_entry_safe(entry, next,
2220 &priv->lec_arp_empty_ones, next) {
2221 if (entry->vcc == vcc) {
2222 lec_arp_clear_vccs(entry);
2223 del_timer(&entry->timer);
2224 hlist_del(&entry->next);
2225 lec_arp_put(entry);
2226 }
2227 }
2228
2229 hlist_for_each_entry_safe(entry, next,
2230 &priv->lec_no_forward, next) {
2231 if (entry->recv_vcc == vcc) {
2232 lec_arp_clear_vccs(entry);
2233 del_timer(&entry->timer);
2234 hlist_del(&entry->next);
2235 lec_arp_put(entry);
2236 }
2237 }
2238
2239 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2240 if (entry->recv_vcc == vcc) {
2241 lec_arp_clear_vccs(entry);
2242 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2243 hlist_del(&entry->next);
2244 lec_arp_put(entry);
2245 }
2246 }
2247
2248 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2249 dump_arp_table(priv);
2250}
2251
2252static void
2253lec_arp_check_empties(struct lec_priv *priv,
2254 struct atm_vcc *vcc, struct sk_buff *skb)
2255{
2256 unsigned long flags;
2257 struct hlist_node *next;
2258 struct lec_arp_table *entry, *tmp;
2259 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2260 unsigned char *src = hdr->h_source;
2261
2262 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2263 hlist_for_each_entry_safe(entry, next,
2264 &priv->lec_arp_empty_ones, next) {
2265 if (vcc == entry->vcc) {
2266 del_timer(&entry->timer);
2267 ether_addr_copy(entry->mac_addr, src);
2268 entry->status = ESI_FORWARD_DIRECT;
2269 entry->last_used = jiffies;
2270 /* We might have got an entry */
2271 tmp = lec_arp_find(priv, src);
2272 if (tmp) {
2273 lec_arp_remove(priv, tmp);
2274 lec_arp_put(tmp);
2275 }
2276 hlist_del(&entry->next);
2277 lec_arp_add(priv, entry);
2278 goto out;
2279 }
2280 }
2281 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2282out:
2283 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2284}
2285
2286MODULE_LICENSE("GPL");