Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and | |
3 | * James Leu (jleu@mindspring.net). | |
4 | * Copyright (C) 2001 by various other people who didn't put their name here. | |
5 | * Licensed under the GPL. | |
6 | */ | |
7 | ||
8 | #include "linux/config.h" | |
9 | #include "linux/kernel.h" | |
10 | #include "linux/netdevice.h" | |
11 | #include "linux/rtnetlink.h" | |
12 | #include "linux/skbuff.h" | |
13 | #include "linux/socket.h" | |
14 | #include "linux/spinlock.h" | |
15 | #include "linux/module.h" | |
16 | #include "linux/init.h" | |
17 | #include "linux/etherdevice.h" | |
18 | #include "linux/list.h" | |
19 | #include "linux/inetdevice.h" | |
20 | #include "linux/ctype.h" | |
21 | #include "linux/bootmem.h" | |
22 | #include "linux/ethtool.h" | |
d052d1be | 23 | #include "linux/platform_device.h" |
1da177e4 LT |
24 | #include "asm/uaccess.h" |
25 | #include "user_util.h" | |
26 | #include "kern_util.h" | |
27 | #include "net_kern.h" | |
28 | #include "net_user.h" | |
29 | #include "mconsole_kern.h" | |
30 | #include "init.h" | |
31 | #include "irq_user.h" | |
32 | #include "irq_kern.h" | |
33 | ||
bf61f50d PBG |
34 | static inline void set_ether_mac(struct net_device *dev, unsigned char *addr) |
35 | { | |
36 | memcpy(dev->dev_addr, addr, ETH_ALEN); | |
37 | } | |
38 | ||
1da177e4 LT |
39 | #define DRIVER_NAME "uml-netdev" |
40 | ||
41 | static DEFINE_SPINLOCK(opened_lock); | |
9010772c | 42 | static LIST_HEAD(opened); |
1da177e4 LT |
43 | |
44 | static int uml_net_rx(struct net_device *dev) | |
45 | { | |
46 | struct uml_net_private *lp = dev->priv; | |
47 | int pkt_len; | |
48 | struct sk_buff *skb; | |
49 | ||
50 | /* If we can't allocate memory, try again next round. */ | |
51 | skb = dev_alloc_skb(dev->mtu); | |
52 | if (skb == NULL) { | |
53 | lp->stats.rx_dropped++; | |
54 | return 0; | |
55 | } | |
56 | ||
57 | skb->dev = dev; | |
58 | skb_put(skb, dev->mtu); | |
59 | skb->mac.raw = skb->data; | |
60 | pkt_len = (*lp->read)(lp->fd, &skb, lp); | |
61 | ||
62 | if (pkt_len > 0) { | |
63 | skb_trim(skb, pkt_len); | |
64 | skb->protocol = (*lp->protocol)(skb); | |
65 | netif_rx(skb); | |
66 | ||
67 | lp->stats.rx_bytes += skb->len; | |
68 | lp->stats.rx_packets++; | |
69 | return pkt_len; | |
70 | } | |
71 | ||
72 | kfree_skb(skb); | |
73 | return pkt_len; | |
74 | } | |
75 | ||
71c8d4c3 PBG |
76 | static void uml_dev_close(void* dev) |
77 | { | |
78 | dev_close( (struct net_device *) dev); | |
79 | } | |
80 | ||
1da177e4 LT |
81 | irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
82 | { | |
83 | struct net_device *dev = dev_id; | |
84 | struct uml_net_private *lp = dev->priv; | |
85 | int err; | |
86 | ||
87 | if(!netif_running(dev)) | |
88 | return(IRQ_NONE); | |
89 | ||
90 | spin_lock(&lp->lock); | |
91 | while((err = uml_net_rx(dev)) > 0) ; | |
92 | if(err < 0) { | |
71c8d4c3 | 93 | DECLARE_WORK(close_work, uml_dev_close, dev); |
1da177e4 LT |
94 | printk(KERN_ERR |
95 | "Device '%s' read returned %d, shutting it down\n", | |
96 | dev->name, err); | |
71c8d4c3 PBG |
97 | /* dev_close can't be called in interrupt context, and takes |
98 | * again lp->lock. | |
99 | * And dev_close() can be safely called multiple times on the | |
100 | * same device, since it tests for (dev->flags & IFF_UP). So | |
101 | * there's no harm in delaying the device shutdown. */ | |
102 | schedule_work(&close_work); | |
1da177e4 LT |
103 | goto out; |
104 | } | |
105 | reactivate_fd(lp->fd, UM_ETH_IRQ); | |
106 | ||
71c8d4c3 | 107 | out: |
1da177e4 LT |
108 | spin_unlock(&lp->lock); |
109 | return(IRQ_HANDLED); | |
110 | } | |
111 | ||
112 | static int uml_net_open(struct net_device *dev) | |
113 | { | |
114 | struct uml_net_private *lp = dev->priv; | |
1da177e4 LT |
115 | int err; |
116 | ||
117 | spin_lock(&lp->lock); | |
118 | ||
119 | if(lp->fd >= 0){ | |
120 | err = -ENXIO; | |
121 | goto out; | |
122 | } | |
123 | ||
124 | if(!lp->have_mac){ | |
0e76422c | 125 | dev_ip_addr(dev, &lp->mac[2]); |
1da177e4 LT |
126 | set_ether_mac(dev, lp->mac); |
127 | } | |
128 | ||
129 | lp->fd = (*lp->open)(&lp->user); | |
130 | if(lp->fd < 0){ | |
131 | err = lp->fd; | |
132 | goto out; | |
133 | } | |
134 | ||
135 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 136 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
137 | if(err != 0){ |
138 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); | |
1da177e4 | 139 | err = -ENETUNREACH; |
14d9ead0 | 140 | goto out_close; |
1da177e4 LT |
141 | } |
142 | ||
143 | lp->tl.data = (unsigned long) &lp->user; | |
144 | netif_start_queue(dev); | |
145 | ||
146 | /* clear buffer - it can happen that the host side of the interface | |
147 | * is full when we get here. In this case, new data is never queued, | |
148 | * SIGIOs never arrive, and the net never works. | |
149 | */ | |
150 | while((err = uml_net_rx(dev)) > 0) ; | |
151 | ||
1da177e4 | 152 | spin_unlock(&lp->lock); |
14d9ead0 JD |
153 | |
154 | spin_lock(&opened_lock); | |
155 | list_add(&lp->list, &opened); | |
156 | spin_unlock(&opened_lock); | |
157 | ||
158 | return 0; | |
159 | out_close: | |
160 | if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); | |
161 | lp->fd = -1; | |
162 | out: | |
163 | spin_unlock(&lp->lock); | |
164 | return err; | |
1da177e4 LT |
165 | } |
166 | ||
167 | static int uml_net_close(struct net_device *dev) | |
168 | { | |
169 | struct uml_net_private *lp = dev->priv; | |
170 | ||
171 | netif_stop_queue(dev); | |
172 | spin_lock(&lp->lock); | |
173 | ||
1da177e4 LT |
174 | free_irq(dev->irq, dev); |
175 | if(lp->close != NULL) | |
176 | (*lp->close)(lp->fd, &lp->user); | |
177 | lp->fd = -1; | |
178 | ||
179 | spin_unlock(&lp->lock); | |
14d9ead0 JD |
180 | |
181 | spin_lock(&opened_lock); | |
182 | list_del(&lp->list); | |
183 | spin_unlock(&opened_lock); | |
184 | ||
1da177e4 LT |
185 | return 0; |
186 | } | |
187 | ||
188 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
189 | { | |
190 | struct uml_net_private *lp = dev->priv; | |
191 | unsigned long flags; | |
192 | int len; | |
193 | ||
194 | netif_stop_queue(dev); | |
195 | ||
196 | spin_lock_irqsave(&lp->lock, flags); | |
197 | ||
198 | len = (*lp->write)(lp->fd, &skb, lp); | |
199 | ||
200 | if(len == skb->len) { | |
201 | lp->stats.tx_packets++; | |
202 | lp->stats.tx_bytes += skb->len; | |
203 | dev->trans_start = jiffies; | |
204 | netif_start_queue(dev); | |
205 | ||
206 | /* this is normally done in the interrupt when tx finishes */ | |
207 | netif_wake_queue(dev); | |
208 | } | |
209 | else if(len == 0){ | |
210 | netif_start_queue(dev); | |
211 | lp->stats.tx_dropped++; | |
212 | } | |
213 | else { | |
214 | netif_start_queue(dev); | |
215 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
216 | } | |
217 | ||
218 | spin_unlock_irqrestore(&lp->lock, flags); | |
219 | ||
220 | dev_kfree_skb(skb); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) | |
226 | { | |
227 | struct uml_net_private *lp = dev->priv; | |
228 | return &lp->stats; | |
229 | } | |
230 | ||
231 | static void uml_net_set_multicast_list(struct net_device *dev) | |
232 | { | |
233 | if (dev->flags & IFF_PROMISC) return; | |
234 | else if (dev->mc_count) dev->flags |= IFF_ALLMULTI; | |
235 | else dev->flags &= ~IFF_ALLMULTI; | |
236 | } | |
237 | ||
238 | static void uml_net_tx_timeout(struct net_device *dev) | |
239 | { | |
240 | dev->trans_start = jiffies; | |
241 | netif_wake_queue(dev); | |
242 | } | |
243 | ||
244 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
245 | { | |
246 | struct uml_net_private *lp = dev->priv; | |
247 | struct sockaddr *hwaddr = addr; | |
248 | ||
249 | spin_lock(&lp->lock); | |
bf61f50d | 250 | set_ether_mac(dev, hwaddr->sa_data); |
1da177e4 LT |
251 | spin_unlock(&lp->lock); |
252 | ||
253 | return(0); | |
254 | } | |
255 | ||
256 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
257 | { | |
258 | struct uml_net_private *lp = dev->priv; | |
259 | int err = 0; | |
260 | ||
261 | spin_lock(&lp->lock); | |
262 | ||
263 | new_mtu = (*lp->set_mtu)(new_mtu, &lp->user); | |
264 | if(new_mtu < 0){ | |
265 | err = new_mtu; | |
266 | goto out; | |
267 | } | |
268 | ||
269 | dev->mtu = new_mtu; | |
270 | ||
271 | out: | |
272 | spin_unlock(&lp->lock); | |
273 | return err; | |
274 | } | |
275 | ||
6d387484 CH |
276 | static void uml_net_get_drvinfo(struct net_device *dev, |
277 | struct ethtool_drvinfo *info) | |
1da177e4 | 278 | { |
6d387484 CH |
279 | strcpy(info->driver, DRIVER_NAME); |
280 | strcpy(info->version, "42"); | |
1da177e4 LT |
281 | } |
282 | ||
6d387484 CH |
283 | static struct ethtool_ops uml_net_ethtool_ops = { |
284 | .get_drvinfo = uml_net_get_drvinfo, | |
285 | .get_link = ethtool_op_get_link, | |
286 | }; | |
287 | ||
1da177e4 LT |
288 | void uml_net_user_timer_expire(unsigned long _conn) |
289 | { | |
290 | #ifdef undef | |
291 | struct connection *conn = (struct connection *)_conn; | |
292 | ||
293 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
294 | do_connect(conn); | |
295 | #endif | |
296 | } | |
297 | ||
298 | static DEFINE_SPINLOCK(devices_lock); | |
9010772c | 299 | static LIST_HEAD(devices); |
1da177e4 | 300 | |
3ae5eaec RK |
301 | static struct platform_driver uml_net_driver = { |
302 | .driver = { | |
303 | .name = DRIVER_NAME, | |
304 | }, | |
1da177e4 LT |
305 | }; |
306 | static int driver_registered; | |
307 | ||
308 | static int eth_configure(int n, void *init, char *mac, | |
309 | struct transport *transport) | |
310 | { | |
311 | struct uml_net *device; | |
312 | struct net_device *dev; | |
313 | struct uml_net_private *lp; | |
314 | int save, err, size; | |
315 | ||
316 | size = transport->private_size + sizeof(struct uml_net_private) + | |
317 | sizeof(((struct uml_net_private *) 0)->user); | |
318 | ||
319 | device = kmalloc(sizeof(*device), GFP_KERNEL); | |
320 | if (device == NULL) { | |
321 | printk(KERN_ERR "eth_configure failed to allocate uml_net\n"); | |
322 | return(1); | |
323 | } | |
324 | ||
325 | memset(device, 0, sizeof(*device)); | |
326 | INIT_LIST_HEAD(&device->list); | |
327 | device->index = n; | |
328 | ||
329 | spin_lock(&devices_lock); | |
330 | list_add(&device->list, &devices); | |
331 | spin_unlock(&devices_lock); | |
332 | ||
333 | if (setup_etheraddr(mac, device->mac)) | |
334 | device->have_mac = 1; | |
335 | ||
336 | printk(KERN_INFO "Netdevice %d ", n); | |
337 | if (device->have_mac) | |
338 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", | |
339 | device->mac[0], device->mac[1], | |
340 | device->mac[2], device->mac[3], | |
341 | device->mac[4], device->mac[5]); | |
342 | printk(": "); | |
343 | dev = alloc_etherdev(size); | |
344 | if (dev == NULL) { | |
345 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); | |
346 | return 1; | |
347 | } | |
348 | ||
e56a7885 PBG |
349 | lp = dev->priv; |
350 | /* This points to the transport private data. It's still clear, but we | |
351 | * must memset it to 0 *now*. Let's help the drivers. */ | |
352 | memset(lp, 0, size); | |
353 | ||
1da177e4 LT |
354 | /* sysfs register */ |
355 | if (!driver_registered) { | |
3ae5eaec | 356 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
357 | driver_registered = 1; |
358 | } | |
359 | device->pdev.id = n; | |
360 | device->pdev.name = DRIVER_NAME; | |
361 | platform_device_register(&device->pdev); | |
362 | SET_NETDEV_DEV(dev,&device->pdev.dev); | |
363 | ||
364 | /* If this name ends up conflicting with an existing registered | |
365 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
366 | * and fail. | |
367 | */ | |
368 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); | |
369 | device->dev = dev; | |
370 | ||
371 | (*transport->kern->init)(dev, init); | |
372 | ||
373 | dev->mtu = transport->user->max_packet; | |
374 | dev->open = uml_net_open; | |
375 | dev->hard_start_xmit = uml_net_start_xmit; | |
376 | dev->stop = uml_net_close; | |
377 | dev->get_stats = uml_net_get_stats; | |
378 | dev->set_multicast_list = uml_net_set_multicast_list; | |
379 | dev->tx_timeout = uml_net_tx_timeout; | |
380 | dev->set_mac_address = uml_net_set_mac; | |
381 | dev->change_mtu = uml_net_change_mtu; | |
6d387484 | 382 | dev->ethtool_ops = ¨_net_ethtool_ops; |
1da177e4 LT |
383 | dev->watchdog_timeo = (HZ >> 1); |
384 | dev->irq = UM_ETH_IRQ; | |
385 | ||
386 | rtnl_lock(); | |
387 | err = register_netdevice(dev); | |
388 | rtnl_unlock(); | |
389 | if (err) { | |
390 | device->dev = NULL; | |
391 | /* XXX: should we call ->remove() here? */ | |
392 | free_netdev(dev); | |
393 | return 1; | |
394 | } | |
1da177e4 LT |
395 | |
396 | /* lp.user is the first four bytes of the transport data, which | |
397 | * has already been initialized. This structure assignment will | |
398 | * overwrite that, so we make sure that .user gets overwritten with | |
399 | * what it already has. | |
400 | */ | |
401 | save = lp->user[0]; | |
402 | *lp = ((struct uml_net_private) | |
403 | { .list = LIST_HEAD_INIT(lp->list), | |
404 | .dev = dev, | |
405 | .fd = -1, | |
406 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
407 | .have_mac = device->have_mac, | |
408 | .protocol = transport->kern->protocol, | |
409 | .open = transport->user->open, | |
410 | .close = transport->user->close, | |
411 | .remove = transport->user->remove, | |
412 | .read = transport->kern->read, | |
413 | .write = transport->kern->write, | |
414 | .add_address = transport->user->add_address, | |
415 | .delete_address = transport->user->delete_address, | |
416 | .set_mtu = transport->user->set_mtu, | |
417 | .user = { save } }); | |
418 | ||
419 | init_timer(&lp->tl); | |
420 | spin_lock_init(&lp->lock); | |
421 | lp->tl.function = uml_net_user_timer_expire; | |
422 | if (lp->have_mac) | |
423 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); | |
424 | ||
425 | if (transport->user->init) | |
426 | (*transport->user->init)(&lp->user, dev); | |
427 | ||
428 | if (device->have_mac) | |
429 | set_ether_mac(dev, device->mac); | |
430 | ||
14d9ead0 | 431 | return 0; |
1da177e4 LT |
432 | } |
433 | ||
434 | static struct uml_net *find_device(int n) | |
435 | { | |
436 | struct uml_net *device; | |
437 | struct list_head *ele; | |
438 | ||
439 | spin_lock(&devices_lock); | |
440 | list_for_each(ele, &devices){ | |
441 | device = list_entry(ele, struct uml_net, list); | |
442 | if(device->index == n) | |
443 | goto out; | |
444 | } | |
445 | device = NULL; | |
446 | out: | |
447 | spin_unlock(&devices_lock); | |
448 | return(device); | |
449 | } | |
450 | ||
451 | static int eth_parse(char *str, int *index_out, char **str_out) | |
452 | { | |
453 | char *end; | |
454 | int n; | |
455 | ||
456 | n = simple_strtoul(str, &end, 0); | |
457 | if(end == str){ | |
458 | printk(KERN_ERR "eth_setup: Failed to parse '%s'\n", str); | |
459 | return(1); | |
460 | } | |
461 | if(n < 0){ | |
462 | printk(KERN_ERR "eth_setup: device %d is negative\n", n); | |
463 | return(1); | |
464 | } | |
465 | str = end; | |
466 | if(*str != '='){ | |
467 | printk(KERN_ERR | |
468 | "eth_setup: expected '=' after device number\n"); | |
469 | return(1); | |
470 | } | |
471 | str++; | |
472 | if(find_device(n)){ | |
473 | printk(KERN_ERR "eth_setup: Device %d already configured\n", | |
474 | n); | |
475 | return(1); | |
476 | } | |
477 | if(index_out) *index_out = n; | |
478 | *str_out = str; | |
479 | return(0); | |
480 | } | |
481 | ||
482 | struct eth_init { | |
483 | struct list_head list; | |
484 | char *init; | |
485 | int index; | |
486 | }; | |
487 | ||
488 | /* Filled in at boot time. Will need locking if the transports become | |
489 | * modular. | |
490 | */ | |
491 | struct list_head transports = LIST_HEAD_INIT(transports); | |
492 | ||
493 | /* Filled in during early boot */ | |
494 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
495 | ||
496 | static int check_transport(struct transport *transport, char *eth, int n, | |
497 | void **init_out, char **mac_out) | |
498 | { | |
499 | int len; | |
500 | ||
501 | len = strlen(transport->name); | |
502 | if(strncmp(eth, transport->name, len)) | |
503 | return(0); | |
504 | ||
505 | eth += len; | |
506 | if(*eth == ',') | |
507 | eth++; | |
508 | else if(*eth != '\0') | |
509 | return(0); | |
510 | ||
511 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
512 | if(*init_out == NULL) | |
513 | return(1); | |
514 | ||
515 | if(!transport->setup(eth, mac_out, *init_out)){ | |
516 | kfree(*init_out); | |
517 | *init_out = NULL; | |
518 | } | |
519 | return(1); | |
520 | } | |
521 | ||
522 | void register_transport(struct transport *new) | |
523 | { | |
524 | struct list_head *ele, *next; | |
525 | struct eth_init *eth; | |
526 | void *init; | |
527 | char *mac = NULL; | |
528 | int match; | |
529 | ||
530 | list_add(&new->list, &transports); | |
531 | ||
532 | list_for_each_safe(ele, next, ð_cmd_line){ | |
533 | eth = list_entry(ele, struct eth_init, list); | |
534 | match = check_transport(new, eth->init, eth->index, &init, | |
535 | &mac); | |
536 | if(!match) | |
537 | continue; | |
538 | else if(init != NULL){ | |
539 | eth_configure(eth->index, init, mac, new); | |
540 | kfree(init); | |
541 | } | |
542 | list_del(ð->list); | |
543 | } | |
544 | } | |
545 | ||
546 | static int eth_setup_common(char *str, int index) | |
547 | { | |
548 | struct list_head *ele; | |
549 | struct transport *transport; | |
550 | void *init; | |
551 | char *mac = NULL; | |
552 | ||
553 | list_for_each(ele, &transports){ | |
554 | transport = list_entry(ele, struct transport, list); | |
555 | if(!check_transport(transport, str, index, &init, &mac)) | |
556 | continue; | |
557 | if(init != NULL){ | |
558 | eth_configure(index, init, mac, transport); | |
559 | kfree(init); | |
560 | } | |
561 | return(1); | |
562 | } | |
563 | return(0); | |
564 | } | |
565 | ||
566 | static int eth_setup(char *str) | |
567 | { | |
568 | struct eth_init *new; | |
569 | int n, err; | |
570 | ||
571 | err = eth_parse(str, &n, &str); | |
572 | if(err) return(1); | |
573 | ||
574 | new = alloc_bootmem(sizeof(new)); | |
575 | if (new == NULL){ | |
576 | printk("eth_init : alloc_bootmem failed\n"); | |
577 | return(1); | |
578 | } | |
579 | ||
580 | INIT_LIST_HEAD(&new->list); | |
581 | new->index = n; | |
582 | new->init = str; | |
583 | ||
584 | list_add_tail(&new->list, ð_cmd_line); | |
585 | return(1); | |
586 | } | |
587 | ||
588 | __setup("eth", eth_setup); | |
589 | __uml_help(eth_setup, | |
590 | "eth[0-9]+=<transport>,<options>\n" | |
591 | " Configure a network device.\n\n" | |
592 | ); | |
593 | ||
594 | #if 0 | |
595 | static int eth_init(void) | |
596 | { | |
597 | struct list_head *ele, *next; | |
598 | struct eth_init *eth; | |
599 | ||
600 | list_for_each_safe(ele, next, ð_cmd_line){ | |
601 | eth = list_entry(ele, struct eth_init, list); | |
602 | ||
603 | if(eth_setup_common(eth->init, eth->index)) | |
604 | list_del(ð->list); | |
605 | } | |
606 | ||
607 | return(1); | |
608 | } | |
609 | __initcall(eth_init); | |
610 | #endif | |
611 | ||
612 | static int net_config(char *str) | |
613 | { | |
614 | int n, err; | |
615 | ||
616 | err = eth_parse(str, &n, &str); | |
617 | if(err) return(err); | |
618 | ||
970d6e3a | 619 | str = kstrdup(str, GFP_KERNEL); |
1da177e4 LT |
620 | if(str == NULL){ |
621 | printk(KERN_ERR "net_config failed to strdup string\n"); | |
622 | return(-1); | |
623 | } | |
624 | err = !eth_setup_common(str, n); | |
625 | if(err) | |
626 | kfree(str); | |
627 | return(err); | |
628 | } | |
629 | ||
29d56cfe JD |
630 | static int net_id(char **str, int *start_out, int *end_out) |
631 | { | |
632 | char *end; | |
633 | int n; | |
634 | ||
635 | n = simple_strtoul(*str, &end, 0); | |
636 | if((*end != '\0') || (end == *str)) | |
637 | return -1; | |
638 | ||
639 | *start_out = n; | |
640 | *end_out = n; | |
641 | *str = end; | |
642 | return n; | |
643 | } | |
644 | ||
645 | static int net_remove(int n) | |
1da177e4 LT |
646 | { |
647 | struct uml_net *device; | |
648 | struct net_device *dev; | |
649 | struct uml_net_private *lp; | |
1da177e4 LT |
650 | |
651 | device = find_device(n); | |
652 | if(device == NULL) | |
29d56cfe | 653 | return -ENODEV; |
1da177e4 LT |
654 | |
655 | dev = device->dev; | |
656 | lp = dev->priv; | |
29d56cfe JD |
657 | if(lp->fd > 0) |
658 | return -EBUSY; | |
1da177e4 LT |
659 | if(lp->remove != NULL) (*lp->remove)(&lp->user); |
660 | unregister_netdev(dev); | |
661 | platform_device_unregister(&device->pdev); | |
662 | ||
663 | list_del(&device->list); | |
664 | kfree(device); | |
665 | free_netdev(dev); | |
29d56cfe | 666 | return 0; |
1da177e4 LT |
667 | } |
668 | ||
669 | static struct mc_device net_mc = { | |
670 | .name = "eth", | |
671 | .config = net_config, | |
672 | .get_config = NULL, | |
29d56cfe | 673 | .id = net_id, |
1da177e4 LT |
674 | .remove = net_remove, |
675 | }; | |
676 | ||
677 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, | |
678 | void *ptr) | |
679 | { | |
680 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
681 | struct net_device *dev = ifa->ifa_dev->dev; |
682 | struct uml_net_private *lp; | |
683 | void (*proc)(unsigned char *, unsigned char *, void *); | |
684 | unsigned char addr_buf[4], netmask_buf[4]; | |
685 | ||
686 | if(dev->open != uml_net_open) return(NOTIFY_DONE); | |
687 | ||
688 | lp = dev->priv; | |
689 | ||
690 | proc = NULL; | |
691 | switch (event){ | |
692 | case NETDEV_UP: | |
693 | proc = lp->add_address; | |
694 | break; | |
695 | case NETDEV_DOWN: | |
696 | proc = lp->delete_address; | |
697 | break; | |
698 | } | |
699 | if(proc != NULL){ | |
0e76422c BS |
700 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
701 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
702 | (*proc)(addr_buf, netmask_buf, &lp->user); |
703 | } | |
704 | return(NOTIFY_DONE); | |
705 | } | |
706 | ||
707 | struct notifier_block uml_inetaddr_notifier = { | |
708 | .notifier_call = uml_inetaddr_event, | |
709 | }; | |
710 | ||
711 | static int uml_net_init(void) | |
712 | { | |
713 | struct list_head *ele; | |
714 | struct uml_net_private *lp; | |
715 | struct in_device *ip; | |
716 | struct in_ifaddr *in; | |
717 | ||
718 | mconsole_register_dev(&net_mc); | |
719 | register_inetaddr_notifier(¨_inetaddr_notifier); | |
720 | ||
721 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
722 | * didn't get a chance to run for them. This fakes it so that | |
723 | * addresses which have already been set up get handled properly. | |
724 | */ | |
725 | list_for_each(ele, &opened){ | |
726 | lp = list_entry(ele, struct uml_net_private, list); | |
727 | ip = lp->dev->ip_ptr; | |
728 | if(ip == NULL) continue; | |
729 | in = ip->ifa_list; | |
730 | while(in != NULL){ | |
731 | uml_inetaddr_event(NULL, NETDEV_UP, in); | |
732 | in = in->ifa_next; | |
733 | } | |
734 | } | |
735 | ||
736 | return(0); | |
737 | } | |
738 | ||
739 | __initcall(uml_net_init); | |
740 | ||
741 | static void close_devices(void) | |
742 | { | |
743 | struct list_head *ele; | |
744 | struct uml_net_private *lp; | |
745 | ||
746 | list_for_each(ele, &opened){ | |
747 | lp = list_entry(ele, struct uml_net_private, list); | |
8d93c700 | 748 | free_irq(lp->dev->irq, lp->dev); |
1da177e4 LT |
749 | if((lp->close != NULL) && (lp->fd >= 0)) |
750 | (*lp->close)(lp->fd, &lp->user); | |
751 | if(lp->remove != NULL) (*lp->remove)(&lp->user); | |
752 | } | |
753 | } | |
754 | ||
755 | __uml_exitcall(close_devices); | |
756 | ||
757 | int setup_etheraddr(char *str, unsigned char *addr) | |
758 | { | |
759 | char *end; | |
760 | int i; | |
761 | ||
762 | if(str == NULL) | |
763 | return(0); | |
764 | for(i=0;i<6;i++){ | |
765 | addr[i] = simple_strtoul(str, &end, 16); | |
766 | if((end == str) || | |
767 | ((*end != ':') && (*end != ',') && (*end != '\0'))){ | |
768 | printk(KERN_ERR | |
769 | "setup_etheraddr: failed to parse '%s' " | |
770 | "as an ethernet address\n", str); | |
771 | return(0); | |
772 | } | |
773 | str = end + 1; | |
774 | } | |
775 | if(addr[0] & 1){ | |
776 | printk(KERN_ERR | |
777 | "Attempt to assign a broadcast ethernet address to a " | |
778 | "device disallowed\n"); | |
779 | return(0); | |
780 | } | |
781 | return(1); | |
782 | } | |
783 | ||
0e76422c | 784 | void dev_ip_addr(void *d, unsigned char *bin_buf) |
1da177e4 LT |
785 | { |
786 | struct net_device *dev = d; | |
787 | struct in_device *ip = dev->ip_ptr; | |
788 | struct in_ifaddr *in; | |
1da177e4 LT |
789 | |
790 | if((ip == NULL) || ((in = ip->ifa_list) == NULL)){ | |
791 | printk(KERN_WARNING "dev_ip_addr - device not assigned an " | |
792 | "IP address\n"); | |
793 | return; | |
794 | } | |
0e76422c | 795 | memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address)); |
1da177e4 LT |
796 | } |
797 | ||
1da177e4 LT |
798 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
799 | { | |
800 | if((skb != NULL) && (skb_tailroom(skb) < extra)){ | |
801 | struct sk_buff *skb2; | |
802 | ||
803 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
804 | dev_kfree_skb(skb); | |
805 | skb = skb2; | |
806 | } | |
807 | if(skb != NULL) skb_put(skb, extra); | |
808 | return(skb); | |
809 | } | |
810 | ||
811 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, | |
812 | void *), | |
813 | void *arg) | |
814 | { | |
815 | struct net_device *dev = d; | |
816 | struct in_device *ip = dev->ip_ptr; | |
817 | struct in_ifaddr *in; | |
818 | unsigned char address[4], netmask[4]; | |
819 | ||
820 | if(ip == NULL) return; | |
821 | in = ip->ifa_list; | |
822 | while(in != NULL){ | |
0e76422c BS |
823 | memcpy(address, &in->ifa_address, sizeof(address)); |
824 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
825 | (*cb)(address, netmask, arg); |
826 | in = in->ifa_next; | |
827 | } | |
828 | } | |
829 | ||
830 | int dev_netmask(void *d, void *m) | |
831 | { | |
832 | struct net_device *dev = d; | |
833 | struct in_device *ip = dev->ip_ptr; | |
834 | struct in_ifaddr *in; | |
835 | __u32 *mask_out = m; | |
836 | ||
837 | if(ip == NULL) | |
838 | return(1); | |
839 | ||
840 | in = ip->ifa_list; | |
841 | if(in == NULL) | |
842 | return(1); | |
843 | ||
844 | *mask_out = in->ifa_mask; | |
845 | return(0); | |
846 | } | |
847 | ||
848 | void *get_output_buffer(int *len_out) | |
849 | { | |
850 | void *ret; | |
851 | ||
852 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
853 | if(ret) *len_out = PAGE_SIZE; | |
854 | else *len_out = 0; | |
855 | return(ret); | |
856 | } | |
857 | ||
858 | void free_output_buffer(void *buffer) | |
859 | { | |
860 | free_pages((unsigned long) buffer, 0); | |
861 | } | |
862 | ||
863 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, | |
864 | char **gate_addr) | |
865 | { | |
866 | char *remain; | |
867 | ||
868 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
869 | if(remain != NULL){ | |
870 | printk("tap_setup_common - Extra garbage on specification : " | |
871 | "'%s'\n", remain); | |
872 | return(1); | |
873 | } | |
874 | ||
875 | return(0); | |
876 | } | |
877 | ||
878 | unsigned short eth_protocol(struct sk_buff *skb) | |
879 | { | |
880 | return(eth_type_trans(skb, skb->dev)); | |
881 | } | |
882 | ||
883 | /* | |
884 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
885 | * Emacs will notice this stuff at the end of the file and automatically | |
886 | * adjust the settings for this buffer only. This must remain at the end | |
887 | * of the file. | |
888 | * --------------------------------------------------------------------------- | |
889 | * Local variables: | |
890 | * c-file-style: "linux" | |
891 | * End: | |
892 | */ |