Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | Experimental ethernet netdevice using ATM AAL5 as underlying carrier | |
3 | (RFC1483 obsoleted by RFC2684) for Linux 2.4 | |
4 | Author: Marcell GAL, 2000, XDSL Ltd, Hungary | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
1da177e4 LT |
8 | #include <linux/init.h> |
9 | #include <linux/kernel.h> | |
10 | #include <linux/list.h> | |
11 | #include <linux/netdevice.h> | |
12 | #include <linux/skbuff.h> | |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/rtnetlink.h> | |
15 | #include <linux/ip.h> | |
16 | #include <asm/uaccess.h> | |
17 | #include <net/arp.h> | |
18 | #include <linux/atm.h> | |
19 | #include <linux/atmdev.h> | |
4fc268d2 | 20 | #include <linux/capability.h> |
1da177e4 LT |
21 | #include <linux/seq_file.h> |
22 | ||
23 | #include <linux/atmbr2684.h> | |
24 | ||
25 | #include "common.h" | |
1da177e4 | 26 | |
1da177e4 LT |
27 | #ifdef SKB_DEBUG |
28 | static void skb_debug(const struct sk_buff *skb) | |
29 | { | |
30 | #define NUM2PRINT 50 | |
31 | char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */ | |
32 | int i = 0; | |
33 | for (i = 0; i < skb->len && i < NUM2PRINT; i++) { | |
34 | sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); | |
35 | } | |
36 | printk(KERN_DEBUG "br2684: skb: %s\n", buf); | |
37 | } | |
38 | #else | |
39 | #define skb_debug(skb) do {} while (0) | |
40 | #endif | |
41 | ||
42 | static unsigned char llc_oui_pid_pad[] = | |
43 | { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 }; | |
44 | #define PADLEN (2) | |
45 | ||
46 | enum br2684_encaps { | |
47 | e_vc = BR2684_ENCAPS_VC, | |
48 | e_llc = BR2684_ENCAPS_LLC, | |
49 | }; | |
50 | ||
51 | struct br2684_vcc { | |
52 | struct atm_vcc *atmvcc; | |
53 | struct net_device *device; | |
54 | /* keep old push,pop functions for chaining */ | |
55 | void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb); | |
56 | /* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */ | |
57 | enum br2684_encaps encaps; | |
58 | struct list_head brvccs; | |
59 | #ifdef CONFIG_ATM_BR2684_IPFILTER | |
60 | struct br2684_filter filter; | |
61 | #endif /* CONFIG_ATM_BR2684_IPFILTER */ | |
1da177e4 | 62 | unsigned copies_needed, copies_failed; |
1da177e4 LT |
63 | }; |
64 | ||
65 | struct br2684_dev { | |
66 | struct net_device *net_dev; | |
67 | struct list_head br2684_devs; | |
68 | int number; | |
69 | struct list_head brvccs; /* one device <=> one vcc (before xmas) */ | |
70 | struct net_device_stats stats; | |
71 | int mac_was_set; | |
72 | }; | |
73 | ||
74 | /* | |
75 | * This lock should be held for writing any time the list of devices or | |
76 | * their attached vcc's could be altered. It should be held for reading | |
77 | * any time these are being queried. Note that we sometimes need to | |
78 | * do read-locking under interrupt context, so write locking must block | |
79 | * the current CPU's interrupts | |
80 | */ | |
81 | static DEFINE_RWLOCK(devs_lock); | |
82 | ||
83 | static LIST_HEAD(br2684_devs); | |
84 | ||
85 | static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev) | |
86 | { | |
87 | return (struct br2684_dev *) net_dev->priv; | |
88 | } | |
89 | ||
90 | static inline struct net_device *list_entry_brdev(const struct list_head *le) | |
91 | { | |
92 | return list_entry(le, struct br2684_dev, br2684_devs)->net_dev; | |
93 | } | |
94 | ||
95 | static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc) | |
96 | { | |
97 | return (struct br2684_vcc *) (atmvcc->user_back); | |
98 | } | |
99 | ||
100 | static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le) | |
101 | { | |
102 | return list_entry(le, struct br2684_vcc, brvccs); | |
103 | } | |
104 | ||
105 | /* Caller should hold read_lock(&devs_lock) */ | |
106 | static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) | |
107 | { | |
108 | struct list_head *lh; | |
109 | struct net_device *net_dev; | |
110 | switch (s->method) { | |
111 | case BR2684_FIND_BYNUM: | |
112 | list_for_each(lh, &br2684_devs) { | |
113 | net_dev = list_entry_brdev(lh); | |
114 | if (BRPRIV(net_dev)->number == s->spec.devnum) | |
115 | return net_dev; | |
116 | } | |
117 | break; | |
118 | case BR2684_FIND_BYIFNAME: | |
119 | list_for_each(lh, &br2684_devs) { | |
120 | net_dev = list_entry_brdev(lh); | |
121 | if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ)) | |
122 | return net_dev; | |
123 | } | |
124 | break; | |
125 | } | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | /* | |
130 | * Send a packet out a particular vcc. Not to useful right now, but paves | |
131 | * the way for multiple vcc's per itf. Returns true if we can send, | |
132 | * otherwise false | |
133 | */ | |
134 | static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, | |
135 | struct br2684_vcc *brvcc) | |
136 | { | |
137 | struct atm_vcc *atmvcc; | |
1da177e4 LT |
138 | int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; |
139 | if (skb_headroom(skb) < minheadroom) { | |
140 | struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); | |
141 | brvcc->copies_needed++; | |
142 | dev_kfree_skb(skb); | |
143 | if (skb2 == NULL) { | |
144 | brvcc->copies_failed++; | |
145 | return 0; | |
146 | } | |
147 | skb = skb2; | |
148 | } | |
149 | skb_push(skb, minheadroom); | |
150 | if (brvcc->encaps == e_llc) | |
27d7ff46 | 151 | skb_copy_to_linear_data(skb, llc_oui_pid_pad, 10); |
1da177e4 LT |
152 | else |
153 | memset(skb->data, 0, 2); | |
1da177e4 LT |
154 | skb_debug(skb); |
155 | ||
156 | ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; | |
52240062 | 157 | pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); |
1da177e4 | 158 | if (!atm_may_send(atmvcc, skb->truesize)) { |
f7d57453 | 159 | /* we free this here for now, because we cannot know in a higher |
1da177e4 LT |
160 | layer whether the skb point it supplied wasn't freed yet. |
161 | now, it always is. | |
162 | */ | |
163 | dev_kfree_skb(skb); | |
164 | return 0; | |
165 | } | |
166 | atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc); | |
167 | ATM_SKB(skb)->atm_options = atmvcc->atm_options; | |
168 | brdev->stats.tx_packets++; | |
169 | brdev->stats.tx_bytes += skb->len; | |
170 | atmvcc->send(atmvcc, skb); | |
171 | return 1; | |
172 | } | |
173 | ||
174 | static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb, | |
175 | struct br2684_dev *brdev) | |
176 | { | |
177 | return list_empty(&brdev->brvccs) ? NULL : | |
178 | list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */ | |
179 | } | |
180 | ||
181 | static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
182 | { | |
183 | struct br2684_dev *brdev = BRPRIV(dev); | |
184 | struct br2684_vcc *brvcc; | |
185 | ||
52240062 | 186 | pr_debug("br2684_start_xmit, skb->dst=%p\n", skb->dst); |
1da177e4 LT |
187 | read_lock(&devs_lock); |
188 | brvcc = pick_outgoing_vcc(skb, brdev); | |
189 | if (brvcc == NULL) { | |
52240062 | 190 | pr_debug("no vcc attached to dev %s\n", dev->name); |
1da177e4 LT |
191 | brdev->stats.tx_errors++; |
192 | brdev->stats.tx_carrier_errors++; | |
193 | /* netif_stop_queue(dev); */ | |
194 | dev_kfree_skb(skb); | |
195 | read_unlock(&devs_lock); | |
4f55cd10 | 196 | return 0; |
1da177e4 LT |
197 | } |
198 | if (!br2684_xmit_vcc(skb, brdev, brvcc)) { | |
199 | /* | |
200 | * We should probably use netif_*_queue() here, but that | |
201 | * involves added complication. We need to walk before | |
202 | * we can run | |
203 | */ | |
204 | /* don't free here! this pointer might be no longer valid! | |
205 | dev_kfree_skb(skb); | |
206 | */ | |
207 | brdev->stats.tx_errors++; | |
208 | brdev->stats.tx_fifo_errors++; | |
209 | } | |
210 | read_unlock(&devs_lock); | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static struct net_device_stats *br2684_get_stats(struct net_device *dev) | |
215 | { | |
52240062 | 216 | pr_debug("br2684_get_stats\n"); |
1da177e4 LT |
217 | return &BRPRIV(dev)->stats; |
218 | } | |
219 | ||
1da177e4 LT |
220 | |
221 | /* | |
222 | * We remember when the MAC gets set, so we don't override it later with | |
223 | * the ESI of the ATM card of the first VC | |
224 | */ | |
225 | static int (*my_eth_mac_addr)(struct net_device *, void *); | |
226 | static int br2684_mac_addr(struct net_device *dev, void *p) | |
227 | { | |
228 | int err = my_eth_mac_addr(dev, p); | |
229 | if (!err) | |
230 | BRPRIV(dev)->mac_was_set = 1; | |
231 | return err; | |
232 | } | |
233 | ||
234 | #ifdef CONFIG_ATM_BR2684_IPFILTER | |
235 | /* this IOCTL is experimental. */ | |
236 | static int br2684_setfilt(struct atm_vcc *atmvcc, void __user *arg) | |
237 | { | |
238 | struct br2684_vcc *brvcc; | |
239 | struct br2684_filter_set fs; | |
240 | ||
241 | if (copy_from_user(&fs, arg, sizeof fs)) | |
242 | return -EFAULT; | |
243 | if (fs.ifspec.method != BR2684_FIND_BYNOTHING) { | |
244 | /* | |
245 | * This is really a per-vcc thing, but we can also search | |
246 | * by device | |
247 | */ | |
248 | struct br2684_dev *brdev; | |
249 | read_lock(&devs_lock); | |
250 | brdev = BRPRIV(br2684_find_dev(&fs.ifspec)); | |
251 | if (brdev == NULL || list_empty(&brdev->brvccs) || | |
252 | brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */ | |
253 | brvcc = NULL; | |
254 | else | |
255 | brvcc = list_entry_brvcc(brdev->brvccs.next); | |
256 | read_unlock(&devs_lock); | |
257 | if (brvcc == NULL) | |
258 | return -ESRCH; | |
259 | } else | |
260 | brvcc = BR2684_VCC(atmvcc); | |
261 | memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter)); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | /* Returns 1 if packet should be dropped */ | |
266 | static inline int | |
30d492da | 267 | packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb) |
1da177e4 LT |
268 | { |
269 | if (brvcc->filter.netmask == 0) | |
270 | return 0; /* no filter in place */ | |
acde4855 | 271 | if (type == htons(ETH_P_IP) && |
1da177e4 LT |
272 | (((struct iphdr *) (skb->data))->daddr & brvcc->filter. |
273 | netmask) == brvcc->filter.prefix) | |
274 | return 0; | |
acde4855 | 275 | if (type == htons(ETH_P_ARP)) |
1da177e4 LT |
276 | return 0; |
277 | /* TODO: we should probably filter ARPs too.. don't want to have | |
278 | * them returning values that don't make sense, or is that ok? | |
279 | */ | |
280 | return 1; /* drop */ | |
281 | } | |
282 | #endif /* CONFIG_ATM_BR2684_IPFILTER */ | |
283 | ||
284 | static void br2684_close_vcc(struct br2684_vcc *brvcc) | |
285 | { | |
52240062 | 286 | pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device); |
1da177e4 LT |
287 | write_lock_irq(&devs_lock); |
288 | list_del(&brvcc->brvccs); | |
289 | write_unlock_irq(&devs_lock); | |
290 | brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */ | |
291 | brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */ | |
292 | kfree(brvcc); | |
293 | module_put(THIS_MODULE); | |
294 | } | |
295 | ||
296 | /* when AAL5 PDU comes in: */ | |
297 | static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) | |
298 | { | |
299 | struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); | |
300 | struct net_device *net_dev = brvcc->device; | |
301 | struct br2684_dev *brdev = BRPRIV(net_dev); | |
302 | int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN; | |
303 | ||
52240062 | 304 | pr_debug("br2684_push\n"); |
1da177e4 LT |
305 | |
306 | if (unlikely(skb == NULL)) { | |
307 | /* skb==NULL means VCC is being destroyed */ | |
308 | br2684_close_vcc(brvcc); | |
309 | if (list_empty(&brdev->brvccs)) { | |
310 | read_lock(&devs_lock); | |
311 | list_del(&brdev->br2684_devs); | |
312 | read_unlock(&devs_lock); | |
313 | unregister_netdev(net_dev); | |
314 | free_netdev(net_dev); | |
315 | } | |
316 | return; | |
317 | } | |
318 | ||
319 | skb_debug(skb); | |
320 | atm_return(atmvcc, skb->truesize); | |
52240062 | 321 | pr_debug("skb from brdev %p\n", brdev); |
1da177e4 LT |
322 | if (brvcc->encaps == e_llc) { |
323 | /* let us waste some time for checking the encapsulation. | |
324 | Note, that only 7 char is checked so frames with a valid FCS | |
325 | are also accepted (but FCS is not checked of course) */ | |
326 | if (memcmp(skb->data, llc_oui_pid_pad, 7)) { | |
327 | brdev->stats.rx_errors++; | |
328 | dev_kfree_skb(skb); | |
329 | return; | |
330 | } | |
331 | ||
332 | /* Strip FCS if present */ | |
333 | if (skb->len > 7 && skb->data[7] == 0x01) | |
334 | __skb_trim(skb, skb->len - 4); | |
335 | } else { | |
336 | plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */ | |
337 | /* first 2 chars should be 0 */ | |
338 | if (*((u16 *) (skb->data)) != 0) { | |
339 | brdev->stats.rx_errors++; | |
340 | dev_kfree_skb(skb); | |
341 | return; | |
342 | } | |
343 | } | |
344 | if (skb->len < plen) { | |
345 | brdev->stats.rx_errors++; | |
346 | dev_kfree_skb(skb); /* dev_ not needed? */ | |
347 | return; | |
348 | } | |
349 | ||
1da177e4 LT |
350 | skb_pull(skb, plen - ETH_HLEN); |
351 | skb->protocol = eth_type_trans(skb, net_dev); | |
1da177e4 LT |
352 | #ifdef CONFIG_ATM_BR2684_IPFILTER |
353 | if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) { | |
354 | brdev->stats.rx_dropped++; | |
355 | dev_kfree_skb(skb); | |
356 | return; | |
357 | } | |
358 | #endif /* CONFIG_ATM_BR2684_IPFILTER */ | |
359 | skb->dev = net_dev; | |
360 | ATM_SKB(skb)->vcc = atmvcc; /* needed ? */ | |
52240062 | 361 | pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol)); |
1da177e4 LT |
362 | skb_debug(skb); |
363 | if (unlikely(!(net_dev->flags & IFF_UP))) { | |
364 | /* sigh, interface is down */ | |
365 | brdev->stats.rx_dropped++; | |
366 | dev_kfree_skb(skb); | |
367 | return; | |
368 | } | |
369 | brdev->stats.rx_packets++; | |
370 | brdev->stats.rx_bytes += skb->len; | |
371 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); | |
372 | netif_rx(skb); | |
373 | } | |
374 | ||
375 | static int br2684_regvcc(struct atm_vcc *atmvcc, void __user *arg) | |
376 | { | |
377 | /* assign a vcc to a dev | |
378 | Note: we do not have explicit unassign, but look at _push() | |
379 | */ | |
380 | int err; | |
381 | struct br2684_vcc *brvcc; | |
1da177e4 | 382 | struct sk_buff *skb; |
c40a27f4 | 383 | struct sk_buff_head *rq; |
1da177e4 LT |
384 | struct br2684_dev *brdev; |
385 | struct net_device *net_dev; | |
386 | struct atm_backend_br2684 be; | |
c40a27f4 | 387 | unsigned long flags; |
1da177e4 LT |
388 | |
389 | if (copy_from_user(&be, arg, sizeof be)) | |
390 | return -EFAULT; | |
0da974f4 | 391 | brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL); |
1da177e4 LT |
392 | if (!brvcc) |
393 | return -ENOMEM; | |
1da177e4 LT |
394 | write_lock_irq(&devs_lock); |
395 | net_dev = br2684_find_dev(&be.ifspec); | |
396 | if (net_dev == NULL) { | |
397 | printk(KERN_ERR | |
398 | "br2684: tried to attach to non-existant device\n"); | |
399 | err = -ENXIO; | |
400 | goto error; | |
401 | } | |
402 | brdev = BRPRIV(net_dev); | |
403 | if (atmvcc->push == NULL) { | |
404 | err = -EBADFD; | |
405 | goto error; | |
406 | } | |
407 | if (!list_empty(&brdev->brvccs)) { | |
408 | /* Only 1 VCC/dev right now */ | |
409 | err = -EEXIST; | |
410 | goto error; | |
411 | } | |
412 | if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO || | |
413 | be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps != | |
414 | BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) || | |
415 | be.min_size != 0) { | |
416 | err = -EINVAL; | |
417 | goto error; | |
418 | } | |
52240062 | 419 | pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, |
1da177e4 LT |
420 | brvcc); |
421 | if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) { | |
422 | unsigned char *esi = atmvcc->dev->esi; | |
423 | if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5]) | |
424 | memcpy(net_dev->dev_addr, esi, net_dev->addr_len); | |
425 | else | |
426 | net_dev->dev_addr[2] = 1; | |
427 | } | |
428 | list_add(&brvcc->brvccs, &brdev->brvccs); | |
429 | write_unlock_irq(&devs_lock); | |
430 | brvcc->device = net_dev; | |
431 | brvcc->atmvcc = atmvcc; | |
432 | atmvcc->user_back = brvcc; | |
433 | brvcc->encaps = (enum br2684_encaps) be.encaps; | |
434 | brvcc->old_push = atmvcc->push; | |
435 | barrier(); | |
436 | atmvcc->push = br2684_push; | |
c40a27f4 DM |
437 | |
438 | rq = &sk_atm(atmvcc)->sk_receive_queue; | |
439 | ||
440 | spin_lock_irqsave(&rq->lock, flags); | |
441 | if (skb_queue_empty(rq)) { | |
442 | skb = NULL; | |
443 | } else { | |
444 | /* NULL terminate the list. */ | |
445 | rq->prev->next = NULL; | |
446 | skb = rq->next; | |
447 | } | |
448 | rq->prev = rq->next = (struct sk_buff *)rq; | |
449 | rq->qlen = 0; | |
450 | spin_unlock_irqrestore(&rq->lock, flags); | |
451 | ||
452 | while (skb) { | |
453 | struct sk_buff *next = skb->next; | |
454 | ||
455 | skb->next = skb->prev = NULL; | |
1da177e4 LT |
456 | BRPRIV(skb->dev)->stats.rx_bytes -= skb->len; |
457 | BRPRIV(skb->dev)->stats.rx_packets--; | |
458 | br2684_push(atmvcc, skb); | |
c40a27f4 DM |
459 | |
460 | skb = next; | |
1da177e4 LT |
461 | } |
462 | __module_get(THIS_MODULE); | |
463 | return 0; | |
464 | error: | |
465 | write_unlock_irq(&devs_lock); | |
466 | kfree(brvcc); | |
467 | return err; | |
468 | } | |
469 | ||
470 | static void br2684_setup(struct net_device *netdev) | |
471 | { | |
472 | struct br2684_dev *brdev = BRPRIV(netdev); | |
473 | ||
474 | ether_setup(netdev); | |
475 | brdev->net_dev = netdev; | |
476 | ||
1da177e4 LT |
477 | my_eth_mac_addr = netdev->set_mac_address; |
478 | netdev->set_mac_address = br2684_mac_addr; | |
479 | netdev->hard_start_xmit = br2684_start_xmit; | |
480 | netdev->get_stats = br2684_get_stats; | |
481 | ||
482 | INIT_LIST_HEAD(&brdev->brvccs); | |
483 | } | |
484 | ||
485 | static int br2684_create(void __user *arg) | |
486 | { | |
487 | int err; | |
488 | struct net_device *netdev; | |
489 | struct br2684_dev *brdev; | |
490 | struct atm_newif_br2684 ni; | |
491 | ||
52240062 | 492 | pr_debug("br2684_create\n"); |
1da177e4 LT |
493 | |
494 | if (copy_from_user(&ni, arg, sizeof ni)) { | |
495 | return -EFAULT; | |
496 | } | |
497 | if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) { | |
498 | return -EINVAL; | |
499 | } | |
500 | ||
501 | netdev = alloc_netdev(sizeof(struct br2684_dev), | |
502 | ni.ifname[0] ? ni.ifname : "nas%d", | |
503 | br2684_setup); | |
504 | if (!netdev) | |
505 | return -ENOMEM; | |
506 | ||
507 | brdev = BRPRIV(netdev); | |
508 | ||
52240062 | 509 | pr_debug("registered netdev %s\n", netdev->name); |
1da177e4 LT |
510 | /* open, stop, do_ioctl ? */ |
511 | err = register_netdev(netdev); | |
512 | if (err < 0) { | |
513 | printk(KERN_ERR "br2684_create: register_netdev failed\n"); | |
514 | free_netdev(netdev); | |
515 | return err; | |
516 | } | |
517 | ||
518 | write_lock_irq(&devs_lock); | |
519 | brdev->number = list_empty(&br2684_devs) ? 1 : | |
520 | BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1; | |
521 | list_add_tail(&brdev->br2684_devs, &br2684_devs); | |
522 | write_unlock_irq(&devs_lock); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* | |
527 | * This handles ioctls actually performed on our vcc - we must return | |
528 | * -ENOIOCTLCMD for any unrecognized ioctl | |
529 | */ | |
530 | static int br2684_ioctl(struct socket *sock, unsigned int cmd, | |
531 | unsigned long arg) | |
532 | { | |
533 | struct atm_vcc *atmvcc = ATM_SD(sock); | |
534 | void __user *argp = (void __user *)arg; | |
535 | ||
536 | int err; | |
537 | switch(cmd) { | |
538 | case ATM_SETBACKEND: | |
539 | case ATM_NEWBACKENDIF: { | |
540 | atm_backend_t b; | |
541 | err = get_user(b, (atm_backend_t __user *) argp); | |
542 | if (err) | |
543 | return -EFAULT; | |
544 | if (b != ATM_BACKEND_BR2684) | |
545 | return -ENOIOCTLCMD; | |
546 | if (!capable(CAP_NET_ADMIN)) | |
547 | return -EPERM; | |
548 | if (cmd == ATM_SETBACKEND) | |
549 | return br2684_regvcc(atmvcc, argp); | |
550 | else | |
551 | return br2684_create(argp); | |
552 | } | |
553 | #ifdef CONFIG_ATM_BR2684_IPFILTER | |
554 | case BR2684_SETFILT: | |
555 | if (atmvcc->push != br2684_push) | |
556 | return -ENOIOCTLCMD; | |
557 | if (!capable(CAP_NET_ADMIN)) | |
558 | return -EPERM; | |
559 | err = br2684_setfilt(atmvcc, argp); | |
560 | return err; | |
561 | #endif /* CONFIG_ATM_BR2684_IPFILTER */ | |
562 | } | |
563 | return -ENOIOCTLCMD; | |
564 | } | |
565 | ||
566 | static struct atm_ioctl br2684_ioctl_ops = { | |
567 | .owner = THIS_MODULE, | |
568 | .ioctl = br2684_ioctl, | |
569 | }; | |
570 | ||
571 | ||
572 | #ifdef CONFIG_PROC_FS | |
573 | static void *br2684_seq_start(struct seq_file *seq, loff_t *pos) | |
574 | { | |
1da177e4 | 575 | read_lock(&devs_lock); |
9af97186 | 576 | return seq_list_start(&br2684_devs, *pos); |
1da177e4 LT |
577 | } |
578 | ||
579 | static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
580 | { | |
9af97186 | 581 | return seq_list_next(v, &br2684_devs, pos); |
1da177e4 LT |
582 | } |
583 | ||
584 | static void br2684_seq_stop(struct seq_file *seq, void *v) | |
585 | { | |
586 | read_unlock(&devs_lock); | |
587 | } | |
588 | ||
589 | static int br2684_seq_show(struct seq_file *seq, void *v) | |
590 | { | |
9af97186 PE |
591 | const struct br2684_dev *brdev = list_entry(v, struct br2684_dev, |
592 | br2684_devs); | |
1da177e4 LT |
593 | const struct net_device *net_dev = brdev->net_dev; |
594 | const struct br2684_vcc *brvcc; | |
0795af57 | 595 | DECLARE_MAC_BUF(mac); |
1da177e4 | 596 | |
0795af57 JP |
597 | seq_printf(seq, "dev %.16s: num=%d, mac=%s (%s)\n", |
598 | net_dev->name, | |
599 | brdev->number, | |
600 | print_mac(mac, net_dev->dev_addr), | |
601 | brdev->mac_was_set ? "set" : "auto"); | |
1da177e4 LT |
602 | |
603 | list_for_each_entry(brvcc, &brdev->brvccs, brvccs) { | |
604 | seq_printf(seq, " vcc %d.%d.%d: encaps=%s" | |
1da177e4 | 605 | ", failed copies %u/%u" |
1da177e4 LT |
606 | "\n", brvcc->atmvcc->dev->number, |
607 | brvcc->atmvcc->vpi, brvcc->atmvcc->vci, | |
608 | (brvcc->encaps == e_llc) ? "LLC" : "VC" | |
1da177e4 LT |
609 | , brvcc->copies_failed |
610 | , brvcc->copies_needed | |
1da177e4 LT |
611 | ); |
612 | #ifdef CONFIG_ATM_BR2684_IPFILTER | |
613 | #define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte] | |
614 | #define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3) | |
615 | if (brvcc->filter.netmask != 0) | |
616 | seq_printf(seq, " filter=%d.%d.%d.%d/" | |
617 | "%d.%d.%d.%d\n", | |
618 | bs(prefix), bs(netmask)); | |
619 | #undef bs | |
620 | #undef b1 | |
621 | #endif /* CONFIG_ATM_BR2684_IPFILTER */ | |
622 | } | |
623 | return 0; | |
624 | } | |
625 | ||
56b3d975 | 626 | static const struct seq_operations br2684_seq_ops = { |
1da177e4 LT |
627 | .start = br2684_seq_start, |
628 | .next = br2684_seq_next, | |
629 | .stop = br2684_seq_stop, | |
630 | .show = br2684_seq_show, | |
631 | }; | |
632 | ||
633 | static int br2684_proc_open(struct inode *inode, struct file *file) | |
634 | { | |
635 | return seq_open(file, &br2684_seq_ops); | |
636 | } | |
637 | ||
9a32144e | 638 | static const struct file_operations br2684_proc_ops = { |
1da177e4 LT |
639 | .owner = THIS_MODULE, |
640 | .open = br2684_proc_open, | |
641 | .read = seq_read, | |
642 | .llseek = seq_lseek, | |
643 | .release = seq_release, | |
644 | }; | |
645 | ||
646 | extern struct proc_dir_entry *atm_proc_root; /* from proc.c */ | |
647 | #endif | |
648 | ||
649 | static int __init br2684_init(void) | |
650 | { | |
651 | #ifdef CONFIG_PROC_FS | |
652 | struct proc_dir_entry *p; | |
653 | if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL) | |
654 | return -ENOMEM; | |
655 | p->proc_fops = &br2684_proc_ops; | |
656 | #endif | |
657 | register_atm_ioctl(&br2684_ioctl_ops); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static void __exit br2684_exit(void) | |
662 | { | |
663 | struct net_device *net_dev; | |
664 | struct br2684_dev *brdev; | |
665 | struct br2684_vcc *brvcc; | |
666 | deregister_atm_ioctl(&br2684_ioctl_ops); | |
667 | ||
668 | #ifdef CONFIG_PROC_FS | |
669 | remove_proc_entry("br2684", atm_proc_root); | |
670 | #endif | |
671 | ||
672 | while (!list_empty(&br2684_devs)) { | |
673 | net_dev = list_entry_brdev(br2684_devs.next); | |
674 | brdev = BRPRIV(net_dev); | |
675 | while (!list_empty(&brdev->brvccs)) { | |
676 | brvcc = list_entry_brvcc(brdev->brvccs.next); | |
677 | br2684_close_vcc(brvcc); | |
678 | } | |
679 | ||
680 | list_del(&brdev->br2684_devs); | |
681 | unregister_netdev(net_dev); | |
682 | free_netdev(net_dev); | |
683 | } | |
684 | } | |
685 | ||
686 | module_init(br2684_init); | |
687 | module_exit(br2684_exit); | |
688 | ||
689 | MODULE_AUTHOR("Marcell GAL"); | |
690 | MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5"); | |
691 | MODULE_LICENSE("GPL"); |