2
* Ethernet netdevice using ATM AAL5 as underlying carrier
3
* (RFC1483 obsoleted by RFC2684) for Linux
5
* Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
6
* Eric Kinzie, 2006-2007, US Naval Research Laboratory
9
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
11
#include <linux/module.h>
12
#include <linux/init.h>
13
#include <linux/kernel.h>
14
#include <linux/list.h>
15
#include <linux/netdevice.h>
16
#include <linux/skbuff.h>
17
#include <linux/etherdevice.h>
18
#include <linux/rtnetlink.h>
20
#include <linux/uaccess.h>
21
#include <linux/slab.h>
23
#include <linux/atm.h>
24
#include <linux/atmdev.h>
25
#include <linux/capability.h>
26
#include <linux/seq_file.h>
28
#include <linux/atmbr2684.h>
32
static void skb_debug(const struct sk_buff *skb)
36
print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
37
16, 1, skb->data, min(NUM2PRINT, skb->len), true);
41
#define BR2684_ETHERTYPE_LEN 2
42
#define BR2684_PAD_LEN 2
44
#define LLC 0xaa, 0xaa, 0x03
45
#define SNAP_BRIDGED 0x00, 0x80, 0xc2
46
#define SNAP_ROUTED 0x00, 0x00, 0x00
47
#define PID_ETHERNET 0x00, 0x07
48
#define ETHERTYPE_IPV4 0x08, 0x00
49
#define ETHERTYPE_IPV6 0x86, 0xdd
50
#define PAD_BRIDGED 0x00, 0x00
52
static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
53
static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
54
static const unsigned char llc_oui_pid_pad[] =
55
{ LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
56
static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
57
static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
60
e_vc = BR2684_ENCAPS_VC,
61
e_llc = BR2684_ENCAPS_LLC,
65
struct atm_vcc *atmvcc;
66
struct net_device *device;
67
/* keep old push, pop functions for chaining */
68
void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
69
void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
70
enum br2684_encaps encaps;
71
struct list_head brvccs;
72
#ifdef CONFIG_ATM_BR2684_IPFILTER
73
struct br2684_filter filter;
74
#endif /* CONFIG_ATM_BR2684_IPFILTER */
75
unsigned copies_needed, copies_failed;
79
struct net_device *net_dev;
80
struct list_head br2684_devs;
82
struct list_head brvccs; /* one device <=> one vcc (before xmas) */
84
enum br2684_payload payload;
88
* This lock should be held for writing any time the list of devices or
89
* their attached vcc's could be altered. It should be held for reading
90
* any time these are being queried. Note that we sometimes need to
91
* do read-locking under interrupt context, so write locking must block
92
* the current CPU's interrupts
94
static DEFINE_RWLOCK(devs_lock);
96
static LIST_HEAD(br2684_devs);
98
static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
100
return netdev_priv(net_dev);
103
static inline struct net_device *list_entry_brdev(const struct list_head *le)
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return list_entry(le, struct br2684_dev, br2684_devs)->net_dev;
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static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
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return (struct br2684_vcc *)(atmvcc->user_back);
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static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
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return list_entry(le, struct br2684_vcc, brvccs);
118
/* Caller should hold read_lock(&devs_lock) */
119
static struct net_device *br2684_find_dev(const struct br2684_if_spec *s)
121
struct list_head *lh;
122
struct net_device *net_dev;
124
case BR2684_FIND_BYNUM:
125
list_for_each(lh, &br2684_devs) {
126
net_dev = list_entry_brdev(lh);
127
if (BRPRIV(net_dev)->number == s->spec.devnum)
131
case BR2684_FIND_BYIFNAME:
132
list_for_each(lh, &br2684_devs) {
133
net_dev = list_entry_brdev(lh);
134
if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ))
142
static int atm_dev_event(struct notifier_block *this, unsigned long event,
145
struct atm_dev *atm_dev = arg;
146
struct list_head *lh;
147
struct net_device *net_dev;
148
struct br2684_vcc *brvcc;
149
struct atm_vcc *atm_vcc;
152
pr_debug("event=%ld dev=%p\n", event, atm_dev);
154
read_lock_irqsave(&devs_lock, flags);
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list_for_each(lh, &br2684_devs) {
156
net_dev = list_entry_brdev(lh);
158
list_for_each_entry(brvcc, &BRPRIV(net_dev)->brvccs, brvccs) {
159
atm_vcc = brvcc->atmvcc;
160
if (atm_vcc && brvcc->atmvcc->dev == atm_dev) {
162
if (atm_vcc->dev->signal == ATM_PHY_SIG_LOST)
163
netif_carrier_off(net_dev);
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netif_carrier_on(net_dev);
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read_unlock_irqrestore(&devs_lock, flags);
175
static struct notifier_block atm_dev_notifier = {
176
.notifier_call = atm_dev_event,
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/* chained vcc->pop function. Check if we should wake the netif_queue */
180
static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
182
struct br2684_vcc *brvcc = BR2684_VCC(vcc);
183
struct net_device *net_dev = skb->dev;
185
pr_debug("(vcc %p ; net_dev %p )\n", vcc, net_dev);
186
brvcc->old_pop(vcc, skb);
191
if (atm_may_send(vcc, 0))
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netif_wake_queue(net_dev);
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* Send a packet out a particular vcc. Not to useful right now, but paves
197
* the way for multiple vcc's per itf. Returns true if we can send,
200
static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
201
struct br2684_vcc *brvcc)
203
struct br2684_dev *brdev = BRPRIV(dev);
204
struct atm_vcc *atmvcc;
205
int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
207
if (skb_headroom(skb) < minheadroom) {
208
struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
209
brvcc->copies_needed++;
212
brvcc->copies_failed++;
218
if (brvcc->encaps == e_llc) {
219
if (brdev->payload == p_bridged) {
220
skb_push(skb, sizeof(llc_oui_pid_pad));
221
skb_copy_to_linear_data(skb, llc_oui_pid_pad,
222
sizeof(llc_oui_pid_pad));
223
} else if (brdev->payload == p_routed) {
224
unsigned short prot = ntohs(skb->protocol);
226
skb_push(skb, sizeof(llc_oui_ipv4));
229
skb_copy_to_linear_data(skb, llc_oui_ipv4,
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sizeof(llc_oui_ipv4));
233
skb_copy_to_linear_data(skb, llc_oui_ipv6,
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sizeof(llc_oui_ipv6));
242
if (brdev->payload == p_bridged) {
244
memset(skb->data, 0, 2);
249
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
250
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
251
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
252
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
253
dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
255
atmvcc->send(atmvcc, skb);
257
if (!atm_may_send(atmvcc, 0)) {
258
netif_stop_queue(brvcc->device);
259
/*check for race with br2684_pop*/
260
if (atm_may_send(atmvcc, 0))
261
netif_start_queue(brvcc->device);
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static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
268
const struct br2684_dev *brdev)
270
return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
273
static netdev_tx_t br2684_start_xmit(struct sk_buff *skb,
274
struct net_device *dev)
276
struct br2684_dev *brdev = BRPRIV(dev);
277
struct br2684_vcc *brvcc;
279
pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
280
read_lock(&devs_lock);
281
brvcc = pick_outgoing_vcc(skb, brdev);
283
pr_debug("no vcc attached to dev %s\n", dev->name);
284
dev->stats.tx_errors++;
285
dev->stats.tx_carrier_errors++;
286
/* netif_stop_queue(dev); */
288
read_unlock(&devs_lock);
291
if (!br2684_xmit_vcc(skb, dev, brvcc)) {
293
* We should probably use netif_*_queue() here, but that
294
* involves added complication. We need to walk before
297
* Don't free here! this pointer might be no longer valid!
299
dev->stats.tx_errors++;
300
dev->stats.tx_fifo_errors++;
302
read_unlock(&devs_lock);
307
* We remember when the MAC gets set, so we don't override it later with
308
* the ESI of the ATM card of the first VC
310
static int br2684_mac_addr(struct net_device *dev, void *p)
312
int err = eth_mac_addr(dev, p);
314
BRPRIV(dev)->mac_was_set = 1;
318
#ifdef CONFIG_ATM_BR2684_IPFILTER
319
/* this IOCTL is experimental. */
320
static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
322
struct br2684_vcc *brvcc;
323
struct br2684_filter_set fs;
325
if (copy_from_user(&fs, arg, sizeof fs))
327
if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
329
* This is really a per-vcc thing, but we can also search
332
struct br2684_dev *brdev;
333
read_lock(&devs_lock);
334
brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
335
if (brdev == NULL || list_empty(&brdev->brvccs) ||
336
brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
339
brvcc = list_entry_brvcc(brdev->brvccs.next);
340
read_unlock(&devs_lock);
344
brvcc = BR2684_VCC(atmvcc);
345
memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
349
/* Returns 1 if packet should be dropped */
351
packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
353
if (brvcc->filter.netmask == 0)
354
return 0; /* no filter in place */
355
if (type == htons(ETH_P_IP) &&
356
(((struct iphdr *)(skb->data))->daddr & brvcc->filter.
357
netmask) == brvcc->filter.prefix)
359
if (type == htons(ETH_P_ARP))
362
* TODO: we should probably filter ARPs too.. don't want to have
363
* them returning values that don't make sense, or is that ok?
367
#endif /* CONFIG_ATM_BR2684_IPFILTER */
369
static void br2684_close_vcc(struct br2684_vcc *brvcc)
371
pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device);
372
write_lock_irq(&devs_lock);
373
list_del(&brvcc->brvccs);
374
write_unlock_irq(&devs_lock);
375
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
376
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
378
module_put(THIS_MODULE);
381
/* when AAL5 PDU comes in: */
382
static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
384
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
385
struct net_device *net_dev = brvcc->device;
386
struct br2684_dev *brdev = BRPRIV(net_dev);
390
if (unlikely(skb == NULL)) {
391
/* skb==NULL means VCC is being destroyed */
392
br2684_close_vcc(brvcc);
393
if (list_empty(&brdev->brvccs)) {
394
write_lock_irq(&devs_lock);
395
list_del(&brdev->br2684_devs);
396
write_unlock_irq(&devs_lock);
397
unregister_netdev(net_dev);
398
free_netdev(net_dev);
404
atm_return(atmvcc, skb->truesize);
405
pr_debug("skb from brdev %p\n", brdev);
406
if (brvcc->encaps == e_llc) {
408
if (skb->len > 7 && skb->data[7] == 0x01)
409
__skb_trim(skb, skb->len - 4);
411
/* accept packets that have "ipv[46]" in the snap header */
412
if ((skb->len >= (sizeof(llc_oui_ipv4))) &&
413
(memcmp(skb->data, llc_oui_ipv4,
414
sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
415
if (memcmp(skb->data + 6, ethertype_ipv6,
416
sizeof(ethertype_ipv6)) == 0)
417
skb->protocol = htons(ETH_P_IPV6);
418
else if (memcmp(skb->data + 6, ethertype_ipv4,
419
sizeof(ethertype_ipv4)) == 0)
420
skb->protocol = htons(ETH_P_IP);
423
skb_pull(skb, sizeof(llc_oui_ipv4));
424
skb_reset_network_header(skb);
425
skb->pkt_type = PACKET_HOST;
427
* Let us waste some time for checking the encapsulation.
428
* Note, that only 7 char is checked so frames with a valid FCS
429
* are also accepted (but FCS is not checked of course).
431
} else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
432
(memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
433
skb_pull(skb, sizeof(llc_oui_pid_pad));
434
skb->protocol = eth_type_trans(skb, net_dev);
439
if (brdev->payload == p_routed) {
442
skb_reset_network_header(skb);
444
if (iph->version == 4)
445
skb->protocol = htons(ETH_P_IP);
446
else if (iph->version == 6)
447
skb->protocol = htons(ETH_P_IPV6);
450
skb->pkt_type = PACKET_HOST;
451
} else { /* p_bridged */
452
/* first 2 chars should be 0 */
453
if (*((u16 *) (skb->data)) != 0)
455
skb_pull(skb, BR2684_PAD_LEN);
456
skb->protocol = eth_type_trans(skb, net_dev);
460
#ifdef CONFIG_ATM_BR2684_IPFILTER
461
if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
463
#endif /* CONFIG_ATM_BR2684_IPFILTER */
465
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
466
pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
468
/* sigh, interface is down? */
469
if (unlikely(!(net_dev->flags & IFF_UP)))
471
net_dev->stats.rx_packets++;
472
net_dev->stats.rx_bytes += skb->len;
473
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
478
net_dev->stats.rx_dropped++;
481
net_dev->stats.rx_errors++;
487
* Assign a vcc to a dev
488
* Note: we do not have explicit unassign, but look at _push()
490
static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
492
struct sk_buff_head queue;
494
struct br2684_vcc *brvcc;
495
struct sk_buff *skb, *tmp;
496
struct sk_buff_head *rq;
497
struct br2684_dev *brdev;
498
struct net_device *net_dev;
499
struct atm_backend_br2684 be;
502
if (copy_from_user(&be, arg, sizeof be))
504
brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
507
write_lock_irq(&devs_lock);
508
net_dev = br2684_find_dev(&be.ifspec);
509
if (net_dev == NULL) {
510
pr_err("tried to attach to non-existent device\n");
514
brdev = BRPRIV(net_dev);
515
if (atmvcc->push == NULL) {
519
if (!list_empty(&brdev->brvccs)) {
520
/* Only 1 VCC/dev right now */
524
if (be.fcs_in != BR2684_FCSIN_NO ||
525
be.fcs_out != BR2684_FCSOUT_NO ||
526
be.fcs_auto || be.has_vpiid || be.send_padding ||
527
(be.encaps != BR2684_ENCAPS_VC &&
528
be.encaps != BR2684_ENCAPS_LLC) ||
533
pr_debug("vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, brvcc);
534
if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
535
unsigned char *esi = atmvcc->dev->esi;
536
if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
537
memcpy(net_dev->dev_addr, esi, net_dev->addr_len);
539
net_dev->dev_addr[2] = 1;
541
list_add(&brvcc->brvccs, &brdev->brvccs);
542
write_unlock_irq(&devs_lock);
543
brvcc->device = net_dev;
544
brvcc->atmvcc = atmvcc;
545
atmvcc->user_back = brvcc;
546
brvcc->encaps = (enum br2684_encaps)be.encaps;
547
brvcc->old_push = atmvcc->push;
548
brvcc->old_pop = atmvcc->pop;
550
atmvcc->push = br2684_push;
551
atmvcc->pop = br2684_pop;
553
__skb_queue_head_init(&queue);
554
rq = &sk_atm(atmvcc)->sk_receive_queue;
556
spin_lock_irqsave(&rq->lock, flags);
557
skb_queue_splice_init(rq, &queue);
558
spin_unlock_irqrestore(&rq->lock, flags);
560
skb_queue_walk_safe(&queue, skb, tmp) {
561
struct net_device *dev;
563
br2684_push(atmvcc, skb);
566
dev->stats.rx_bytes -= skb->len;
567
dev->stats.rx_packets--;
570
/* initialize netdev carrier state */
571
if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
572
netif_carrier_off(net_dev);
574
netif_carrier_on(net_dev);
576
__module_get(THIS_MODULE);
580
write_unlock_irq(&devs_lock);
585
static const struct net_device_ops br2684_netdev_ops = {
586
.ndo_start_xmit = br2684_start_xmit,
587
.ndo_set_mac_address = br2684_mac_addr,
588
.ndo_change_mtu = eth_change_mtu,
589
.ndo_validate_addr = eth_validate_addr,
592
static const struct net_device_ops br2684_netdev_ops_routed = {
593
.ndo_start_xmit = br2684_start_xmit,
594
.ndo_set_mac_address = br2684_mac_addr,
595
.ndo_change_mtu = eth_change_mtu
598
static void br2684_setup(struct net_device *netdev)
600
struct br2684_dev *brdev = BRPRIV(netdev);
603
brdev->net_dev = netdev;
605
netdev->netdev_ops = &br2684_netdev_ops;
607
INIT_LIST_HEAD(&brdev->brvccs);
610
static void br2684_setup_routed(struct net_device *netdev)
612
struct br2684_dev *brdev = BRPRIV(netdev);
614
brdev->net_dev = netdev;
615
netdev->hard_header_len = 0;
616
netdev->netdev_ops = &br2684_netdev_ops_routed;
617
netdev->addr_len = 0;
619
netdev->type = ARPHRD_PPP;
620
netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
621
netdev->tx_queue_len = 100;
622
INIT_LIST_HEAD(&brdev->brvccs);
625
static int br2684_create(void __user *arg)
628
struct net_device *netdev;
629
struct br2684_dev *brdev;
630
struct atm_newif_br2684 ni;
631
enum br2684_payload payload;
635
if (copy_from_user(&ni, arg, sizeof ni))
638
if (ni.media & BR2684_FLAG_ROUTED)
642
ni.media &= 0xffff; /* strip flags */
644
if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500)
647
netdev = alloc_netdev(sizeof(struct br2684_dev),
648
ni.ifname[0] ? ni.ifname : "nas%d",
649
(payload == p_routed) ?
650
br2684_setup_routed : br2684_setup);
654
brdev = BRPRIV(netdev);
656
pr_debug("registered netdev %s\n", netdev->name);
657
/* open, stop, do_ioctl ? */
658
err = register_netdev(netdev);
660
pr_err("register_netdev failed\n");
665
write_lock_irq(&devs_lock);
667
brdev->payload = payload;
669
if (list_empty(&br2684_devs)) {
670
/* 1st br2684 device */
673
brdev->number = BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
675
list_add_tail(&brdev->br2684_devs, &br2684_devs);
676
write_unlock_irq(&devs_lock);
681
* This handles ioctls actually performed on our vcc - we must return
682
* -ENOIOCTLCMD for any unrecognized ioctl
684
static int br2684_ioctl(struct socket *sock, unsigned int cmd,
687
struct atm_vcc *atmvcc = ATM_SD(sock);
688
void __user *argp = (void __user *)arg;
694
case ATM_NEWBACKENDIF:
695
err = get_user(b, (atm_backend_t __user *) argp);
698
if (b != ATM_BACKEND_BR2684)
700
if (!capable(CAP_NET_ADMIN))
702
if (cmd == ATM_SETBACKEND)
703
return br2684_regvcc(atmvcc, argp);
705
return br2684_create(argp);
706
#ifdef CONFIG_ATM_BR2684_IPFILTER
708
if (atmvcc->push != br2684_push)
710
if (!capable(CAP_NET_ADMIN))
712
err = br2684_setfilt(atmvcc, argp);
715
#endif /* CONFIG_ATM_BR2684_IPFILTER */
720
static struct atm_ioctl br2684_ioctl_ops = {
721
.owner = THIS_MODULE,
722
.ioctl = br2684_ioctl,
725
#ifdef CONFIG_PROC_FS
726
static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
727
__acquires(devs_lock)
729
read_lock(&devs_lock);
730
return seq_list_start(&br2684_devs, *pos);
733
static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
735
return seq_list_next(v, &br2684_devs, pos);
738
static void br2684_seq_stop(struct seq_file *seq, void *v)
739
__releases(devs_lock)
741
read_unlock(&devs_lock);
744
static int br2684_seq_show(struct seq_file *seq, void *v)
746
const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
748
const struct net_device *net_dev = brdev->net_dev;
749
const struct br2684_vcc *brvcc;
751
seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
755
brdev->mac_was_set ? "set" : "auto");
757
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
758
seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s"
759
", failed copies %u/%u"
760
"\n", brvcc->atmvcc->dev->number,
761
brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
762
(brvcc->encaps == e_llc) ? "LLC" : "VC",
763
(brdev->payload == p_bridged) ? "bridged" : "routed",
764
brvcc->copies_failed, brvcc->copies_needed);
765
#ifdef CONFIG_ATM_BR2684_IPFILTER
766
#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
767
#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
768
if (brvcc->filter.netmask != 0)
769
seq_printf(seq, " filter=%d.%d.%d.%d/"
770
"%d.%d.%d.%d\n", bs(prefix), bs(netmask));
773
#endif /* CONFIG_ATM_BR2684_IPFILTER */
778
static const struct seq_operations br2684_seq_ops = {
779
.start = br2684_seq_start,
780
.next = br2684_seq_next,
781
.stop = br2684_seq_stop,
782
.show = br2684_seq_show,
785
static int br2684_proc_open(struct inode *inode, struct file *file)
787
return seq_open(file, &br2684_seq_ops);
790
static const struct file_operations br2684_proc_ops = {
791
.owner = THIS_MODULE,
792
.open = br2684_proc_open,
795
.release = seq_release,
798
extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
799
#endif /* CONFIG_PROC_FS */
801
static int __init br2684_init(void)
803
#ifdef CONFIG_PROC_FS
804
struct proc_dir_entry *p;
805
p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops);
809
register_atm_ioctl(&br2684_ioctl_ops);
810
register_atmdevice_notifier(&atm_dev_notifier);
814
static void __exit br2684_exit(void)
816
struct net_device *net_dev;
817
struct br2684_dev *brdev;
818
struct br2684_vcc *brvcc;
819
deregister_atm_ioctl(&br2684_ioctl_ops);
821
#ifdef CONFIG_PROC_FS
822
remove_proc_entry("br2684", atm_proc_root);
826
unregister_atmdevice_notifier(&atm_dev_notifier);
828
while (!list_empty(&br2684_devs)) {
829
net_dev = list_entry_brdev(br2684_devs.next);
830
brdev = BRPRIV(net_dev);
831
while (!list_empty(&brdev->brvccs)) {
832
brvcc = list_entry_brvcc(brdev->brvccs.next);
833
br2684_close_vcc(brvcc);
836
list_del(&brdev->br2684_devs);
837
unregister_netdev(net_dev);
838
free_netdev(net_dev);
842
module_init(br2684_init);
843
module_exit(br2684_exit);
845
MODULE_AUTHOR("Marcell GAL");
846
MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
847
MODULE_LICENSE("GPL");