blob: cc78538d163bbf05bd6bcf5aa5c8c4954fe8ac66 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Chas Williamsfb64c732007-12-30 23:18:29 -08002 * Ethernet netdevice using ATM AAL5 as underlying carrier
3 * (RFC1483 obsoleted by RFC2684) for Linux
4 *
5 * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
6 * Eric Kinzie, 2006-2007, US Naval Research Laboratory
7 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Joe Perches99824462010-01-26 11:40:00 +00009#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#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>
19#include <linux/ip.h>
Joe Perches641d7292010-01-26 11:40:04 +000020#include <linux/uaccess.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <net/arp.h>
23#include <linux/atm.h>
24#include <linux/atmdev.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080025#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/seq_file.h>
27
28#include <linux/atmbr2684.h>
29
30#include "common.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Linus Torvalds1da177e2005-04-16 15:20:36 -070032static void skb_debug(const struct sk_buff *skb)
33{
Joe Perches641d7292010-01-26 11:40:04 +000034#ifdef SKB_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#define NUM2PRINT 50
Joe Perches641d7292010-01-26 11:40:04 +000036 print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
37 16, 1, skb->data, min(NUM2PRINT, skb->len), true);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#endif
Joe Perches641d7292010-01-26 11:40:04 +000039}
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Eric Kinzie097b19a2007-12-30 23:17:53 -080041#define BR2684_ETHERTYPE_LEN 2
42#define BR2684_PAD_LEN 2
43
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
51
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070052static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
53static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
54static const unsigned char llc_oui_pid_pad[] =
Chas Williamsfb64c732007-12-30 23:18:29 -080055 { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
Pascal Hambourgbefc93f2011-08-17 08:37:52 +020056static const unsigned char pad[] = { PAD_BRIDGED };
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070057static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
58static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60enum br2684_encaps {
Chas Williamsfb64c732007-12-30 23:18:29 -080061 e_vc = BR2684_ENCAPS_VC,
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 e_llc = BR2684_ENCAPS_LLC,
63};
64
65struct br2684_vcc {
Chas Williamsfb64c732007-12-30 23:18:29 -080066 struct atm_vcc *atmvcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 struct net_device *device;
Chas Williamsfb64c732007-12-30 23:18:29 -080068 /* keep old push, pop functions for chaining */
Joe Perches641d7292010-01-26 11:40:04 +000069 void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
Karl Hiramoto137742c2009-09-02 23:26:39 -070070 void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
David Woodhouseb8958852012-11-27 23:28:36 +000071 void (*old_release_cb)(struct atm_vcc *vcc);
David Woodhoused71ffeb2012-11-28 00:46:45 +000072 struct module *old_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 enum br2684_encaps encaps;
74 struct list_head brvccs;
75#ifdef CONFIG_ATM_BR2684_IPFILTER
76 struct br2684_filter filter;
77#endif /* CONFIG_ATM_BR2684_IPFILTER */
Eric Dumazet95c96172012-04-15 05:58:06 +000078 unsigned int copies_needed, copies_failed;
David Woodhouseae088d62012-11-25 12:06:52 +000079 atomic_t qspace;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82struct br2684_dev {
83 struct net_device *net_dev;
84 struct list_head br2684_devs;
85 int number;
Chas Williamsfb64c732007-12-30 23:18:29 -080086 struct list_head brvccs; /* one device <=> one vcc (before xmas) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 int mac_was_set;
Eric Kinzie097b19a2007-12-30 23:17:53 -080088 enum br2684_payload payload;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089};
90
91/*
92 * This lock should be held for writing any time the list of devices or
93 * their attached vcc's could be altered. It should be held for reading
94 * any time these are being queried. Note that we sometimes need to
95 * do read-locking under interrupt context, so write locking must block
96 * the current CPU's interrupts
97 */
98static DEFINE_RWLOCK(devs_lock);
99
100static LIST_HEAD(br2684_devs);
101
102static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
103{
Joe Perches37d66802010-11-15 11:12:33 +0000104 return netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105}
106
107static inline struct net_device *list_entry_brdev(const struct list_head *le)
108{
109 return list_entry(le, struct br2684_dev, br2684_devs)->net_dev;
110}
111
112static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
113{
Chas Williamsfb64c732007-12-30 23:18:29 -0800114 return (struct br2684_vcc *)(atmvcc->user_back);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115}
116
117static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
118{
119 return list_entry(le, struct br2684_vcc, brvccs);
120}
121
122/* Caller should hold read_lock(&devs_lock) */
123static struct net_device *br2684_find_dev(const struct br2684_if_spec *s)
124{
125 struct list_head *lh;
126 struct net_device *net_dev;
127 switch (s->method) {
128 case BR2684_FIND_BYNUM:
129 list_for_each(lh, &br2684_devs) {
130 net_dev = list_entry_brdev(lh);
131 if (BRPRIV(net_dev)->number == s->spec.devnum)
132 return net_dev;
133 }
134 break;
135 case BR2684_FIND_BYIFNAME:
136 list_for_each(lh, &br2684_devs) {
137 net_dev = list_entry_brdev(lh);
138 if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ))
139 return net_dev;
140 }
141 break;
142 }
143 return NULL;
144}
145
Karl Hiramoto00506612010-07-08 20:55:31 +0000146static int atm_dev_event(struct notifier_block *this, unsigned long event,
147 void *arg)
148{
149 struct atm_dev *atm_dev = arg;
150 struct list_head *lh;
151 struct net_device *net_dev;
152 struct br2684_vcc *brvcc;
153 struct atm_vcc *atm_vcc;
154 unsigned long flags;
155
156 pr_debug("event=%ld dev=%p\n", event, atm_dev);
157
158 read_lock_irqsave(&devs_lock, flags);
159 list_for_each(lh, &br2684_devs) {
160 net_dev = list_entry_brdev(lh);
161
162 list_for_each_entry(brvcc, &BRPRIV(net_dev)->brvccs, brvccs) {
163 atm_vcc = brvcc->atmvcc;
164 if (atm_vcc && brvcc->atmvcc->dev == atm_dev) {
165
166 if (atm_vcc->dev->signal == ATM_PHY_SIG_LOST)
167 netif_carrier_off(net_dev);
168 else
169 netif_carrier_on(net_dev);
170
171 }
172 }
173 }
174 read_unlock_irqrestore(&devs_lock, flags);
175
176 return NOTIFY_DONE;
177}
178
179static struct notifier_block atm_dev_notifier = {
180 .notifier_call = atm_dev_event,
181};
182
Karl Hiramoto137742c2009-09-02 23:26:39 -0700183/* chained vcc->pop function. Check if we should wake the netif_queue */
184static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
185{
186 struct br2684_vcc *brvcc = BR2684_VCC(vcc);
Karl Hiramoto137742c2009-09-02 23:26:39 -0700187
David Woodhouseae088d62012-11-25 12:06:52 +0000188 pr_debug("(vcc %p ; net_dev %p )\n", vcc, brvcc->device);
Karl Hiramoto137742c2009-09-02 23:26:39 -0700189 brvcc->old_pop(vcc, skb);
190
David Woodhouseae088d62012-11-25 12:06:52 +0000191 /* If the queue space just went up from zero, wake */
192 if (atomic_inc_return(&brvcc->qspace) == 1)
193 netif_wake_queue(brvcc->device);
Karl Hiramoto137742c2009-09-02 23:26:39 -0700194}
David Woodhouseae088d62012-11-25 12:06:52 +0000195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196/*
197 * Send a packet out a particular vcc. Not to useful right now, but paves
198 * the way for multiple vcc's per itf. Returns true if we can send,
199 * otherwise false
200 */
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000201static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
Chas Williamsfb64c732007-12-30 23:18:29 -0800202 struct br2684_vcc *brvcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000204 struct br2684_dev *brdev = BRPRIV(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 struct atm_vcc *atmvcc;
Pascal Hambourg9e667b22011-08-17 08:37:18 +0200206 int minheadroom = (brvcc->encaps == e_llc) ?
207 ((brdev->payload == p_bridged) ?
208 sizeof(llc_oui_pid_pad) : sizeof(llc_oui_ipv4)) :
209 ((brdev->payload == p_bridged) ? BR2684_PAD_LEN : 0);
Eric Kinzie097b19a2007-12-30 23:17:53 -0800210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (skb_headroom(skb) < minheadroom) {
212 struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
213 brvcc->copies_needed++;
214 dev_kfree_skb(skb);
215 if (skb2 == NULL) {
216 brvcc->copies_failed++;
217 return 0;
218 }
219 skb = skb2;
220 }
Eric Kinzie097b19a2007-12-30 23:17:53 -0800221
222 if (brvcc->encaps == e_llc) {
223 if (brdev->payload == p_bridged) {
224 skb_push(skb, sizeof(llc_oui_pid_pad));
Chas Williamsfb64c732007-12-30 23:18:29 -0800225 skb_copy_to_linear_data(skb, llc_oui_pid_pad,
226 sizeof(llc_oui_pid_pad));
Eric Kinzie097b19a2007-12-30 23:17:53 -0800227 } else if (brdev->payload == p_routed) {
228 unsigned short prot = ntohs(skb->protocol);
229
230 skb_push(skb, sizeof(llc_oui_ipv4));
231 switch (prot) {
Chas Williamsfb64c732007-12-30 23:18:29 -0800232 case ETH_P_IP:
233 skb_copy_to_linear_data(skb, llc_oui_ipv4,
234 sizeof(llc_oui_ipv4));
235 break;
236 case ETH_P_IPV6:
237 skb_copy_to_linear_data(skb, llc_oui_ipv6,
238 sizeof(llc_oui_ipv6));
239 break;
240 default:
241 dev_kfree_skb(skb);
242 return 0;
Eric Kinzie097b19a2007-12-30 23:17:53 -0800243 }
244 }
Eric Kinzie7e903c22008-06-16 17:18:18 -0700245 } else { /* e_vc */
246 if (brdev->payload == p_bridged) {
247 skb_push(skb, 2);
Eric Kinzie097b19a2007-12-30 23:17:53 -0800248 memset(skb->data, 0, 2);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700249 }
Eric Kinzie097b19a2007-12-30 23:17:53 -0800250 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 skb_debug(skb);
252
253 ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
Stephen Hemminger52240062007-08-28 15:22:09 -0700254 pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
256 ATM_SKB(skb)->atm_options = atmvcc->atm_options;
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000257 dev->stats.tx_packets++;
258 dev->stats.tx_bytes += skb->len;
Karl Hiramoto137742c2009-09-02 23:26:39 -0700259
David Woodhouseae088d62012-11-25 12:06:52 +0000260 if (atomic_dec_return(&brvcc->qspace) < 1) {
261 /* No more please! */
Karl Hiramoto137742c2009-09-02 23:26:39 -0700262 netif_stop_queue(brvcc->device);
David Woodhouseae088d62012-11-25 12:06:52 +0000263 /* We might have raced with br2684_pop() */
264 if (unlikely(atomic_read(&brvcc->qspace) > 0))
265 netif_wake_queue(brvcc->device);
Karl Hiramoto137742c2009-09-02 23:26:39 -0700266 }
267
David Woodhouseae088d62012-11-25 12:06:52 +0000268 /* If this fails immediately, the skb will be freed and br2684_pop()
269 will wake the queue if appropriate. Just return an error so that
270 the stats are updated correctly */
271 return !atmvcc->send(atmvcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
David Woodhouseb8958852012-11-27 23:28:36 +0000274static void br2684_release_cb(struct atm_vcc *atmvcc)
275{
276 struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
277
278 if (atomic_read(&brvcc->qspace) > 0)
279 netif_wake_queue(brvcc->device);
280
281 if (brvcc->old_release_cb)
282 brvcc->old_release_cb(atmvcc);
283}
284
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -0700285static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
286 const struct br2684_dev *brdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Chas Williamsfb64c732007-12-30 23:18:29 -0800288 return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289}
290
Stephen Hemminger3c805a22009-08-31 19:50:42 +0000291static netdev_tx_t br2684_start_xmit(struct sk_buff *skb,
292 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
294 struct br2684_dev *brdev = BRPRIV(dev);
295 struct br2684_vcc *brvcc;
David Woodhouseb8958852012-11-27 23:28:36 +0000296 struct atm_vcc *atmvcc;
297 netdev_tx_t ret = NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Joe Perches99824462010-01-26 11:40:00 +0000299 pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 read_lock(&devs_lock);
301 brvcc = pick_outgoing_vcc(skb, brdev);
302 if (brvcc == NULL) {
Stephen Hemminger52240062007-08-28 15:22:09 -0700303 pr_debug("no vcc attached to dev %s\n", dev->name);
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000304 dev->stats.tx_errors++;
305 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 /* netif_stop_queue(dev); */
307 dev_kfree_skb(skb);
David Woodhouseb8958852012-11-27 23:28:36 +0000308 goto out_devs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 }
David Woodhouseb8958852012-11-27 23:28:36 +0000310 atmvcc = brvcc->atmvcc;
311
312 bh_lock_sock(sk_atm(atmvcc));
313
314 if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
315 test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
316 !test_bit(ATM_VF_READY, &atmvcc->flags)) {
317 dev->stats.tx_dropped++;
318 dev_kfree_skb(skb);
319 goto out;
320 }
321
322 if (sock_owned_by_user(sk_atm(atmvcc))) {
323 netif_stop_queue(brvcc->device);
324 ret = NETDEV_TX_BUSY;
325 goto out;
326 }
327
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000328 if (!br2684_xmit_vcc(skb, dev, brvcc)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 /*
330 * We should probably use netif_*_queue() here, but that
331 * involves added complication. We need to walk before
Chas Williamsfb64c732007-12-30 23:18:29 -0800332 * we can run.
333 *
334 * Don't free here! this pointer might be no longer valid!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 */
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000336 dev->stats.tx_errors++;
337 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
David Woodhouseb8958852012-11-27 23:28:36 +0000339 out:
340 bh_unlock_sock(sk_atm(atmvcc));
341 out_devs:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 read_unlock(&devs_lock);
David Woodhouseb8958852012-11-27 23:28:36 +0000343 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346/*
347 * We remember when the MAC gets set, so we don't override it later with
348 * the ESI of the ATM card of the first VC
349 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350static int br2684_mac_addr(struct net_device *dev, void *p)
351{
Stephen Hemminger0ba25ff2009-01-09 13:00:59 +0000352 int err = eth_mac_addr(dev, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 if (!err)
354 BRPRIV(dev)->mac_was_set = 1;
355 return err;
356}
357
358#ifdef CONFIG_ATM_BR2684_IPFILTER
359/* this IOCTL is experimental. */
Chas Williamsfb64c732007-12-30 23:18:29 -0800360static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 struct br2684_vcc *brvcc;
363 struct br2684_filter_set fs;
364
365 if (copy_from_user(&fs, arg, sizeof fs))
366 return -EFAULT;
367 if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
368 /*
369 * This is really a per-vcc thing, but we can also search
Chas Williamsfb64c732007-12-30 23:18:29 -0800370 * by device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 */
372 struct br2684_dev *brdev;
373 read_lock(&devs_lock);
374 brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
Joe Perches641d7292010-01-26 11:40:04 +0000375 if (brdev == NULL || list_empty(&brdev->brvccs) ||
376 brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 brvcc = NULL;
378 else
379 brvcc = list_entry_brvcc(brdev->brvccs.next);
380 read_unlock(&devs_lock);
381 if (brvcc == NULL)
382 return -ESRCH;
383 } else
384 brvcc = BR2684_VCC(atmvcc);
385 memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
386 return 0;
387}
388
389/* Returns 1 if packet should be dropped */
390static inline int
Al Viro30d492d2006-11-14 21:11:29 -0800391packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392{
393 if (brvcc->filter.netmask == 0)
Chas Williamsfb64c732007-12-30 23:18:29 -0800394 return 0; /* no filter in place */
YOSHIFUJI Hideakiacde4852007-03-25 20:12:32 -0700395 if (type == htons(ETH_P_IP) &&
Chas Williamsfb64c732007-12-30 23:18:29 -0800396 (((struct iphdr *)(skb->data))->daddr & brvcc->filter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 netmask) == brvcc->filter.prefix)
398 return 0;
YOSHIFUJI Hideakiacde4852007-03-25 20:12:32 -0700399 if (type == htons(ETH_P_ARP))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 return 0;
Chas Williamsfb64c732007-12-30 23:18:29 -0800401 /*
402 * TODO: we should probably filter ARPs too.. don't want to have
403 * them returning values that don't make sense, or is that ok?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 */
405 return 1; /* drop */
406}
407#endif /* CONFIG_ATM_BR2684_IPFILTER */
408
409static void br2684_close_vcc(struct br2684_vcc *brvcc)
410{
Stephen Hemminger52240062007-08-28 15:22:09 -0700411 pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 write_lock_irq(&devs_lock);
413 list_del(&brvcc->brvccs);
414 write_unlock_irq(&devs_lock);
415 brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
David Woodhouseb8958852012-11-27 23:28:36 +0000416 brvcc->atmvcc->release_cb = brvcc->old_release_cb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
David Woodhoused71ffeb2012-11-28 00:46:45 +0000418 module_put(brvcc->old_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 kfree(brvcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420}
421
422/* when AAL5 PDU comes in: */
423static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
424{
425 struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
426 struct net_device *net_dev = brvcc->device;
427 struct br2684_dev *brdev = BRPRIV(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Joe Perches99824462010-01-26 11:40:00 +0000429 pr_debug("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 if (unlikely(skb == NULL)) {
432 /* skb==NULL means VCC is being destroyed */
433 br2684_close_vcc(brvcc);
434 if (list_empty(&brdev->brvccs)) {
Pavel Emelyanov1e0ba002008-05-04 18:00:36 -0700435 write_lock_irq(&devs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 list_del(&brdev->br2684_devs);
Pavel Emelyanov1e0ba002008-05-04 18:00:36 -0700437 write_unlock_irq(&devs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 unregister_netdev(net_dev);
David S. Miller5f6b1ea2008-05-06 00:00:16 -0700439 free_netdev(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
441 return;
442 }
443
444 skb_debug(skb);
445 atm_return(atmvcc, skb->truesize);
Stephen Hemminger52240062007-08-28 15:22:09 -0700446 pr_debug("skb from brdev %p\n", brdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 if (brvcc->encaps == e_llc) {
Eric Kinzie097b19a2007-12-30 23:17:53 -0800448
449 if (skb->len > 7 && skb->data[7] == 0x01)
450 __skb_trim(skb, skb->len - 4);
451
452 /* accept packets that have "ipv[46]" in the snap header */
Joe Perches641d7292010-01-26 11:40:04 +0000453 if ((skb->len >= (sizeof(llc_oui_ipv4))) &&
454 (memcmp(skb->data, llc_oui_ipv4,
455 sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
456 if (memcmp(skb->data + 6, ethertype_ipv6,
457 sizeof(ethertype_ipv6)) == 0)
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -0700458 skb->protocol = htons(ETH_P_IPV6);
Joe Perches641d7292010-01-26 11:40:04 +0000459 else if (memcmp(skb->data + 6, ethertype_ipv4,
460 sizeof(ethertype_ipv4)) == 0)
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -0700461 skb->protocol = htons(ETH_P_IP);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700462 else
463 goto error;
Eric Kinzie097b19a2007-12-30 23:17:53 -0800464 skb_pull(skb, sizeof(llc_oui_ipv4));
465 skb_reset_network_header(skb);
466 skb->pkt_type = PACKET_HOST;
Joe Perches641d7292010-01-26 11:40:04 +0000467 /*
468 * Let us waste some time for checking the encapsulation.
469 * Note, that only 7 char is checked so frames with a valid FCS
470 * are also accepted (but FCS is not checked of course).
471 */
Eric Kinzie097b19a2007-12-30 23:17:53 -0800472 } else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
Chas Williamsfb64c732007-12-30 23:18:29 -0800473 (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
Eric Kinzie097b19a2007-12-30 23:17:53 -0800474 skb_pull(skb, sizeof(llc_oui_pid_pad));
475 skb->protocol = eth_type_trans(skb, net_dev);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700476 } else
477 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Eric Kinzie7e903c22008-06-16 17:18:18 -0700479 } else { /* e_vc */
480 if (brdev->payload == p_routed) {
481 struct iphdr *iph;
482
483 skb_reset_network_header(skb);
484 iph = ip_hdr(skb);
485 if (iph->version == 4)
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -0700486 skb->protocol = htons(ETH_P_IP);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700487 else if (iph->version == 6)
Arnaldo Carvalho de Melo60678042008-09-20 22:20:49 -0700488 skb->protocol = htons(ETH_P_IPV6);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700489 else
490 goto error;
491 skb->pkt_type = PACKET_HOST;
492 } else { /* p_bridged */
493 /* first 2 chars should be 0 */
Pascal Hambourgbefc93f2011-08-17 08:37:52 +0200494 if (memcmp(skb->data, pad, BR2684_PAD_LEN) != 0)
Eric Kinzie7e903c22008-06-16 17:18:18 -0700495 goto error;
496 skb_pull(skb, BR2684_PAD_LEN);
497 skb->protocol = eth_type_trans(skb, net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 }
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501#ifdef CONFIG_ATM_BR2684_IPFILTER
Eric Kinzie7e903c22008-06-16 17:18:18 -0700502 if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
503 goto dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504#endif /* CONFIG_ATM_BR2684_IPFILTER */
505 skb->dev = net_dev;
506 ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
Stephen Hemminger52240062007-08-28 15:22:09 -0700507 pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 skb_debug(skb);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700509 /* sigh, interface is down? */
510 if (unlikely(!(net_dev->flags & IFF_UP)))
511 goto dropped;
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000512 net_dev->stats.rx_packets++;
513 net_dev->stats.rx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
515 netif_rx(skb);
Eric Kinzie7e903c22008-06-16 17:18:18 -0700516 return;
517
518dropped:
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000519 net_dev->stats.rx_dropped++;
Eric Kinzie7e903c22008-06-16 17:18:18 -0700520 goto free_skb;
521error:
Stephen Hemminger410e9d82009-01-09 13:00:58 +0000522 net_dev->stats.rx_errors++;
Eric Kinzie7e903c22008-06-16 17:18:18 -0700523free_skb:
524 dev_kfree_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525}
526
Chas Williamsfb64c732007-12-30 23:18:29 -0800527/*
528 * Assign a vcc to a dev
529 * Note: we do not have explicit unassign, but look at _push()
530 */
531static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 struct br2684_vcc *brvcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 struct br2684_dev *brdev;
535 struct net_device *net_dev;
536 struct atm_backend_br2684 be;
Jorge Boncompte [DTI2]4e55f572011-11-21 10:25:57 +0000537 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
539 if (copy_from_user(&be, arg, sizeof be))
540 return -EFAULT;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700541 brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 if (!brvcc)
543 return -ENOMEM;
David Woodhouseae088d62012-11-25 12:06:52 +0000544 /*
545 * Allow two packets in the ATM queue. One actually being sent, and one
546 * for the ATM 'TX done' handler to send. It shouldn't take long to get
547 * the next one from the netdev queue, when we need it. More than that
548 * would be bufferbloat.
549 */
550 atomic_set(&brvcc->qspace, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 write_lock_irq(&devs_lock);
552 net_dev = br2684_find_dev(&be.ifspec);
553 if (net_dev == NULL) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300554 pr_err("tried to attach to non-existent device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 err = -ENXIO;
556 goto error;
557 }
558 brdev = BRPRIV(net_dev);
559 if (atmvcc->push == NULL) {
560 err = -EBADFD;
561 goto error;
562 }
563 if (!list_empty(&brdev->brvccs)) {
564 /* Only 1 VCC/dev right now */
565 err = -EEXIST;
566 goto error;
567 }
Joe Perches641d7292010-01-26 11:40:04 +0000568 if (be.fcs_in != BR2684_FCSIN_NO ||
569 be.fcs_out != BR2684_FCSOUT_NO ||
570 be.fcs_auto || be.has_vpiid || be.send_padding ||
571 (be.encaps != BR2684_ENCAPS_VC &&
572 be.encaps != BR2684_ENCAPS_LLC) ||
573 be.min_size != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 err = -EINVAL;
575 goto error;
576 }
Joe Perches99824462010-01-26 11:40:00 +0000577 pr_debug("vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, brvcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
579 unsigned char *esi = atmvcc->dev->esi;
580 if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
581 memcpy(net_dev->dev_addr, esi, net_dev->addr_len);
582 else
583 net_dev->dev_addr[2] = 1;
584 }
585 list_add(&brvcc->brvccs, &brdev->brvccs);
586 write_unlock_irq(&devs_lock);
587 brvcc->device = net_dev;
588 brvcc->atmvcc = atmvcc;
589 atmvcc->user_back = brvcc;
Chas Williamsfb64c732007-12-30 23:18:29 -0800590 brvcc->encaps = (enum br2684_encaps)be.encaps;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 brvcc->old_push = atmvcc->push;
Karl Hiramoto137742c2009-09-02 23:26:39 -0700592 brvcc->old_pop = atmvcc->pop;
David Woodhouseb8958852012-11-27 23:28:36 +0000593 brvcc->old_release_cb = atmvcc->release_cb;
David Woodhoused71ffeb2012-11-28 00:46:45 +0000594 brvcc->old_owner = atmvcc->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 barrier();
596 atmvcc->push = br2684_push;
Karl Hiramoto137742c2009-09-02 23:26:39 -0700597 atmvcc->pop = br2684_pop;
David Woodhouseb8958852012-11-27 23:28:36 +0000598 atmvcc->release_cb = br2684_release_cb;
David Woodhoused71ffeb2012-11-28 00:46:45 +0000599 atmvcc->owner = THIS_MODULE;
David S. Millerc40a27f2006-11-30 21:05:23 -0800600
Karl Hiramoto00506612010-07-08 20:55:31 +0000601 /* initialize netdev carrier state */
602 if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
603 netif_carrier_off(net_dev);
604 else
605 netif_carrier_on(net_dev);
606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 __module_get(THIS_MODULE);
Jorge Boncompte [DTI2]4e55f572011-11-21 10:25:57 +0000608
609 /* re-process everything received between connection setup and
610 backend setup */
611 vcc_process_recv_queue(atmvcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 return 0;
Joe Perches641d7292010-01-26 11:40:04 +0000613
614error:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 write_unlock_irq(&devs_lock);
616 kfree(brvcc);
617 return err;
618}
619
Stephen Hemminger0ba25ff2009-01-09 13:00:59 +0000620static const struct net_device_ops br2684_netdev_ops = {
621 .ndo_start_xmit = br2684_start_xmit,
622 .ndo_set_mac_address = br2684_mac_addr,
623 .ndo_change_mtu = eth_change_mtu,
624 .ndo_validate_addr = eth_validate_addr,
625};
626
chas williams - CONTRACTOR2e302eb2009-12-04 11:06:32 +0000627static const struct net_device_ops br2684_netdev_ops_routed = {
628 .ndo_start_xmit = br2684_start_xmit,
629 .ndo_set_mac_address = br2684_mac_addr,
630 .ndo_change_mtu = eth_change_mtu
631};
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633static void br2684_setup(struct net_device *netdev)
634{
635 struct br2684_dev *brdev = BRPRIV(netdev);
636
637 ether_setup(netdev);
Pascal Hambourg9e667b22011-08-17 08:37:18 +0200638 netdev->hard_header_len += sizeof(llc_oui_pid_pad); /* worst case */
Rabin Vincent902e5ea2009-05-02 13:49:36 -0700639 brdev->net_dev = netdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Stephen Hemminger0ba25ff2009-01-09 13:00:59 +0000641 netdev->netdev_ops = &br2684_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643 INIT_LIST_HEAD(&brdev->brvccs);
644}
645
Eric Kinzie097b19a2007-12-30 23:17:53 -0800646static void br2684_setup_routed(struct net_device *netdev)
647{
648 struct br2684_dev *brdev = BRPRIV(netdev);
chas williams - CONTRACTOR2e302eb2009-12-04 11:06:32 +0000649
Eric Kinzie097b19a2007-12-30 23:17:53 -0800650 brdev->net_dev = netdev;
Pascal Hambourg9e667b22011-08-17 08:37:18 +0200651 netdev->hard_header_len = sizeof(llc_oui_ipv4); /* worst case */
chas williams - CONTRACTOR2e302eb2009-12-04 11:06:32 +0000652 netdev->netdev_ops = &br2684_netdev_ops_routed;
Eric Kinzie097b19a2007-12-30 23:17:53 -0800653 netdev->addr_len = 0;
654 netdev->mtu = 1500;
655 netdev->type = ARPHRD_PPP;
656 netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
657 netdev->tx_queue_len = 100;
658 INIT_LIST_HEAD(&brdev->brvccs);
659}
660
Joe Perches641d7292010-01-26 11:40:04 +0000661static int br2684_create(void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662{
663 int err;
664 struct net_device *netdev;
665 struct br2684_dev *brdev;
666 struct atm_newif_br2684 ni;
Eric Kinzie097b19a2007-12-30 23:17:53 -0800667 enum br2684_payload payload;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Joe Perches99824462010-01-26 11:40:00 +0000669 pr_debug("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Joe Perches641d7292010-01-26 11:40:04 +0000671 if (copy_from_user(&ni, arg, sizeof ni))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 return -EFAULT;
Eric Kinzie097b19a2007-12-30 23:17:53 -0800673
674 if (ni.media & BR2684_FLAG_ROUTED)
675 payload = p_routed;
676 else
677 payload = p_bridged;
Chas Williamsfb64c732007-12-30 23:18:29 -0800678 ni.media &= 0xffff; /* strip flags */
Eric Kinzie097b19a2007-12-30 23:17:53 -0800679
Joe Perches641d7292010-01-26 11:40:04 +0000680 if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 netdev = alloc_netdev(sizeof(struct br2684_dev),
684 ni.ifname[0] ? ni.ifname : "nas%d",
Tom Gundersenc835a672014-07-14 16:37:24 +0200685 NET_NAME_UNKNOWN,
686 (payload == p_routed) ? br2684_setup_routed : br2684_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 if (!netdev)
688 return -ENOMEM;
689
690 brdev = BRPRIV(netdev);
691
Stephen Hemminger52240062007-08-28 15:22:09 -0700692 pr_debug("registered netdev %s\n", netdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 /* open, stop, do_ioctl ? */
694 err = register_netdev(netdev);
695 if (err < 0) {
Joe Perches99824462010-01-26 11:40:00 +0000696 pr_err("register_netdev failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 free_netdev(netdev);
698 return err;
699 }
700
701 write_lock_irq(&devs_lock);
Karl Hiramoto00506612010-07-08 20:55:31 +0000702
Eric Kinzie097b19a2007-12-30 23:17:53 -0800703 brdev->payload = payload;
Karl Hiramoto00506612010-07-08 20:55:31 +0000704
705 if (list_empty(&br2684_devs)) {
706 /* 1st br2684 device */
Karl Hiramoto00506612010-07-08 20:55:31 +0000707 brdev->number = 1;
708 } else
709 brdev->number = BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
710
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 list_add_tail(&brdev->br2684_devs, &br2684_devs);
712 write_unlock_irq(&devs_lock);
713 return 0;
714}
715
716/*
717 * This handles ioctls actually performed on our vcc - we must return
718 * -ENOIOCTLCMD for any unrecognized ioctl
719 */
720static int br2684_ioctl(struct socket *sock, unsigned int cmd,
Chas Williamsfb64c732007-12-30 23:18:29 -0800721 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722{
723 struct atm_vcc *atmvcc = ATM_SD(sock);
724 void __user *argp = (void __user *)arg;
Chas Williamsfb64c732007-12-30 23:18:29 -0800725 atm_backend_t b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
727 int err;
Chas Williamsfb64c732007-12-30 23:18:29 -0800728 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 case ATM_SETBACKEND:
Chas Williamsfb64c732007-12-30 23:18:29 -0800730 case ATM_NEWBACKENDIF:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 err = get_user(b, (atm_backend_t __user *) argp);
732 if (err)
733 return -EFAULT;
734 if (b != ATM_BACKEND_BR2684)
735 return -ENOIOCTLCMD;
736 if (!capable(CAP_NET_ADMIN))
737 return -EPERM;
Krzysztof Mazur9eba2522012-11-28 09:08:04 +0100738 if (cmd == ATM_SETBACKEND) {
739 if (sock->state != SS_CONNECTED)
740 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 return br2684_regvcc(atmvcc, argp);
Krzysztof Mazur9eba2522012-11-28 09:08:04 +0100742 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 return br2684_create(argp);
Krzysztof Mazur9eba2522012-11-28 09:08:04 +0100744 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745#ifdef CONFIG_ATM_BR2684_IPFILTER
746 case BR2684_SETFILT:
747 if (atmvcc->push != br2684_push)
748 return -ENOIOCTLCMD;
749 if (!capable(CAP_NET_ADMIN))
750 return -EPERM;
751 err = br2684_setfilt(atmvcc, argp);
Chas Williamsfb64c732007-12-30 23:18:29 -0800752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 return err;
754#endif /* CONFIG_ATM_BR2684_IPFILTER */
755 }
756 return -ENOIOCTLCMD;
757}
758
759static struct atm_ioctl br2684_ioctl_ops = {
Chas Williamsfb64c732007-12-30 23:18:29 -0800760 .owner = THIS_MODULE,
761 .ioctl = br2684_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762};
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764#ifdef CONFIG_PROC_FS
Chas Williamsfb64c732007-12-30 23:18:29 -0800765static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
Eric Dumazet5c17d5f2008-01-15 03:29:50 -0800766 __acquires(devs_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 read_lock(&devs_lock);
Pavel Emelianov9af97182007-07-09 13:12:24 -0700769 return seq_list_start(&br2684_devs, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770}
771
Chas Williamsfb64c732007-12-30 23:18:29 -0800772static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773{
Pavel Emelianov9af97182007-07-09 13:12:24 -0700774 return seq_list_next(v, &br2684_devs, pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775}
776
777static void br2684_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet5c17d5f2008-01-15 03:29:50 -0800778 __releases(devs_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
780 read_unlock(&devs_lock);
781}
782
783static int br2684_seq_show(struct seq_file *seq, void *v)
784{
Pavel Emelianov9af97182007-07-09 13:12:24 -0700785 const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
Chas Williamsfb64c732007-12-30 23:18:29 -0800786 br2684_devs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 const struct net_device *net_dev = brdev->net_dev;
788 const struct br2684_vcc *brvcc;
789
Johannes Berge1749612008-10-27 15:59:26 -0700790 seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
Joe Perches0795af52007-10-03 17:59:30 -0700791 net_dev->name,
792 brdev->number,
Johannes Berge1749612008-10-27 15:59:26 -0700793 net_dev->dev_addr,
Joe Perches0795af52007-10-03 17:59:30 -0700794 brdev->mac_was_set ? "set" : "auto");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
796 list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
Eric Kinzie097b19a2007-12-30 23:17:53 -0800797 seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s"
Chas Williamsfb64c732007-12-30 23:18:29 -0800798 ", failed copies %u/%u"
799 "\n", brvcc->atmvcc->dev->number,
800 brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
801 (brvcc->encaps == e_llc) ? "LLC" : "VC",
802 (brdev->payload == p_bridged) ? "bridged" : "routed",
803 brvcc->copies_failed, brvcc->copies_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804#ifdef CONFIG_ATM_BR2684_IPFILTER
805#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
806#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
Chas Williamsfb64c732007-12-30 23:18:29 -0800807 if (brvcc->filter.netmask != 0)
808 seq_printf(seq, " filter=%d.%d.%d.%d/"
809 "%d.%d.%d.%d\n", bs(prefix), bs(netmask));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810#undef bs
811#undef b1
812#endif /* CONFIG_ATM_BR2684_IPFILTER */
813 }
814 return 0;
815}
816
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700817static const struct seq_operations br2684_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 .start = br2684_seq_start,
Chas Williamsfb64c732007-12-30 23:18:29 -0800819 .next = br2684_seq_next,
820 .stop = br2684_seq_stop,
821 .show = br2684_seq_show,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822};
823
824static int br2684_proc_open(struct inode *inode, struct file *file)
825{
826 return seq_open(file, &br2684_seq_ops);
827}
828
Arjan van de Ven9a321442007-02-12 00:55:35 -0800829static const struct file_operations br2684_proc_ops = {
Chas Williamsfb64c732007-12-30 23:18:29 -0800830 .owner = THIS_MODULE,
831 .open = br2684_proc_open,
832 .read = seq_read,
833 .llseek = seq_lseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 .release = seq_release,
835};
836
837extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
Chas Williamsfb64c732007-12-30 23:18:29 -0800838#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840static int __init br2684_init(void)
841{
842#ifdef CONFIG_PROC_FS
843 struct proc_dir_entry *p;
Wang Chen16e297b2008-02-28 13:55:45 -0800844 p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops);
845 if (p == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847#endif
848 register_atm_ioctl(&br2684_ioctl_ops);
Karl Hiramotoa3d67132010-09-23 01:50:54 +0000849 register_atmdevice_notifier(&atm_dev_notifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 return 0;
851}
852
853static void __exit br2684_exit(void)
854{
855 struct net_device *net_dev;
856 struct br2684_dev *brdev;
857 struct br2684_vcc *brvcc;
858 deregister_atm_ioctl(&br2684_ioctl_ops);
859
860#ifdef CONFIG_PROC_FS
861 remove_proc_entry("br2684", atm_proc_root);
862#endif
863
Karl Hiramoto00506612010-07-08 20:55:31 +0000864
Karl Hiramotoa3d67132010-09-23 01:50:54 +0000865 unregister_atmdevice_notifier(&atm_dev_notifier);
Karl Hiramoto00506612010-07-08 20:55:31 +0000866
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 while (!list_empty(&br2684_devs)) {
868 net_dev = list_entry_brdev(br2684_devs.next);
869 brdev = BRPRIV(net_dev);
870 while (!list_empty(&brdev->brvccs)) {
871 brvcc = list_entry_brvcc(brdev->brvccs.next);
872 br2684_close_vcc(brvcc);
873 }
874
875 list_del(&brdev->br2684_devs);
876 unregister_netdev(net_dev);
David S. Miller5f6b1ea2008-05-06 00:00:16 -0700877 free_netdev(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 }
879}
880
881module_init(br2684_init);
882module_exit(br2684_exit);
883
884MODULE_AUTHOR("Marcell GAL");
885MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
886MODULE_LICENSE("GPL");