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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 | ||
1da177e4 LT |
117 | if(lp->fd >= 0){ |
118 | err = -ENXIO; | |
119 | goto out; | |
120 | } | |
121 | ||
122 | if(!lp->have_mac){ | |
0e76422c | 123 | dev_ip_addr(dev, &lp->mac[2]); |
1da177e4 LT |
124 | set_ether_mac(dev, lp->mac); |
125 | } | |
126 | ||
127 | lp->fd = (*lp->open)(&lp->user); | |
128 | if(lp->fd < 0){ | |
129 | err = lp->fd; | |
130 | goto out; | |
131 | } | |
132 | ||
133 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 134 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
135 | if(err != 0){ |
136 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); | |
1da177e4 | 137 | err = -ENETUNREACH; |
14d9ead0 | 138 | goto out_close; |
1da177e4 LT |
139 | } |
140 | ||
141 | lp->tl.data = (unsigned long) &lp->user; | |
142 | netif_start_queue(dev); | |
143 | ||
144 | /* clear buffer - it can happen that the host side of the interface | |
145 | * is full when we get here. In this case, new data is never queued, | |
146 | * SIGIOs never arrive, and the net never works. | |
147 | */ | |
148 | while((err = uml_net_rx(dev)) > 0) ; | |
149 | ||
14d9ead0 JD |
150 | spin_lock(&opened_lock); |
151 | list_add(&lp->list, &opened); | |
152 | spin_unlock(&opened_lock); | |
153 | ||
154 | return 0; | |
155 | out_close: | |
156 | if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); | |
157 | lp->fd = -1; | |
158 | out: | |
14d9ead0 | 159 | return err; |
1da177e4 LT |
160 | } |
161 | ||
162 | static int uml_net_close(struct net_device *dev) | |
163 | { | |
164 | struct uml_net_private *lp = dev->priv; | |
165 | ||
166 | netif_stop_queue(dev); | |
1da177e4 | 167 | |
1da177e4 LT |
168 | free_irq(dev->irq, dev); |
169 | if(lp->close != NULL) | |
170 | (*lp->close)(lp->fd, &lp->user); | |
171 | lp->fd = -1; | |
172 | ||
14d9ead0 JD |
173 | spin_lock(&opened_lock); |
174 | list_del(&lp->list); | |
175 | spin_unlock(&opened_lock); | |
176 | ||
1da177e4 LT |
177 | return 0; |
178 | } | |
179 | ||
180 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
181 | { | |
182 | struct uml_net_private *lp = dev->priv; | |
183 | unsigned long flags; | |
184 | int len; | |
185 | ||
186 | netif_stop_queue(dev); | |
187 | ||
188 | spin_lock_irqsave(&lp->lock, flags); | |
189 | ||
190 | len = (*lp->write)(lp->fd, &skb, lp); | |
191 | ||
192 | if(len == skb->len) { | |
193 | lp->stats.tx_packets++; | |
194 | lp->stats.tx_bytes += skb->len; | |
195 | dev->trans_start = jiffies; | |
196 | netif_start_queue(dev); | |
197 | ||
198 | /* this is normally done in the interrupt when tx finishes */ | |
199 | netif_wake_queue(dev); | |
200 | } | |
201 | else if(len == 0){ | |
202 | netif_start_queue(dev); | |
203 | lp->stats.tx_dropped++; | |
204 | } | |
205 | else { | |
206 | netif_start_queue(dev); | |
207 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
208 | } | |
209 | ||
210 | spin_unlock_irqrestore(&lp->lock, flags); | |
211 | ||
212 | dev_kfree_skb(skb); | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) | |
218 | { | |
219 | struct uml_net_private *lp = dev->priv; | |
220 | return &lp->stats; | |
221 | } | |
222 | ||
223 | static void uml_net_set_multicast_list(struct net_device *dev) | |
224 | { | |
225 | if (dev->flags & IFF_PROMISC) return; | |
226 | else if (dev->mc_count) dev->flags |= IFF_ALLMULTI; | |
227 | else dev->flags &= ~IFF_ALLMULTI; | |
228 | } | |
229 | ||
230 | static void uml_net_tx_timeout(struct net_device *dev) | |
231 | { | |
232 | dev->trans_start = jiffies; | |
233 | netif_wake_queue(dev); | |
234 | } | |
235 | ||
236 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
237 | { | |
238 | struct uml_net_private *lp = dev->priv; | |
239 | struct sockaddr *hwaddr = addr; | |
240 | ||
48af05ed | 241 | spin_lock_irq(&lp->lock); |
bf61f50d | 242 | set_ether_mac(dev, hwaddr->sa_data); |
48af05ed | 243 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
244 | |
245 | return(0); | |
246 | } | |
247 | ||
248 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
249 | { | |
250 | struct uml_net_private *lp = dev->priv; | |
251 | int err = 0; | |
252 | ||
48af05ed | 253 | spin_lock_irq(&lp->lock); |
1da177e4 LT |
254 | |
255 | new_mtu = (*lp->set_mtu)(new_mtu, &lp->user); | |
256 | if(new_mtu < 0){ | |
257 | err = new_mtu; | |
258 | goto out; | |
259 | } | |
260 | ||
261 | dev->mtu = new_mtu; | |
262 | ||
263 | out: | |
48af05ed | 264 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
265 | return err; |
266 | } | |
267 | ||
6d387484 CH |
268 | static void uml_net_get_drvinfo(struct net_device *dev, |
269 | struct ethtool_drvinfo *info) | |
1da177e4 | 270 | { |
6d387484 CH |
271 | strcpy(info->driver, DRIVER_NAME); |
272 | strcpy(info->version, "42"); | |
1da177e4 LT |
273 | } |
274 | ||
6d387484 CH |
275 | static struct ethtool_ops uml_net_ethtool_ops = { |
276 | .get_drvinfo = uml_net_get_drvinfo, | |
277 | .get_link = ethtool_op_get_link, | |
278 | }; | |
279 | ||
1da177e4 LT |
280 | void uml_net_user_timer_expire(unsigned long _conn) |
281 | { | |
282 | #ifdef undef | |
283 | struct connection *conn = (struct connection *)_conn; | |
284 | ||
285 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
286 | do_connect(conn); | |
287 | #endif | |
288 | } | |
289 | ||
290 | static DEFINE_SPINLOCK(devices_lock); | |
9010772c | 291 | static LIST_HEAD(devices); |
1da177e4 | 292 | |
3ae5eaec RK |
293 | static struct platform_driver uml_net_driver = { |
294 | .driver = { | |
295 | .name = DRIVER_NAME, | |
296 | }, | |
1da177e4 LT |
297 | }; |
298 | static int driver_registered; | |
299 | ||
300 | static int eth_configure(int n, void *init, char *mac, | |
301 | struct transport *transport) | |
302 | { | |
303 | struct uml_net *device; | |
304 | struct net_device *dev; | |
305 | struct uml_net_private *lp; | |
306 | int save, err, size; | |
307 | ||
308 | size = transport->private_size + sizeof(struct uml_net_private) + | |
309 | sizeof(((struct uml_net_private *) 0)->user); | |
310 | ||
311 | device = kmalloc(sizeof(*device), GFP_KERNEL); | |
312 | if (device == NULL) { | |
313 | printk(KERN_ERR "eth_configure failed to allocate uml_net\n"); | |
314 | return(1); | |
315 | } | |
316 | ||
317 | memset(device, 0, sizeof(*device)); | |
318 | INIT_LIST_HEAD(&device->list); | |
319 | device->index = n; | |
320 | ||
321 | spin_lock(&devices_lock); | |
322 | list_add(&device->list, &devices); | |
323 | spin_unlock(&devices_lock); | |
324 | ||
325 | if (setup_etheraddr(mac, device->mac)) | |
326 | device->have_mac = 1; | |
327 | ||
328 | printk(KERN_INFO "Netdevice %d ", n); | |
329 | if (device->have_mac) | |
330 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", | |
331 | device->mac[0], device->mac[1], | |
332 | device->mac[2], device->mac[3], | |
333 | device->mac[4], device->mac[5]); | |
334 | printk(": "); | |
335 | dev = alloc_etherdev(size); | |
336 | if (dev == NULL) { | |
337 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); | |
338 | return 1; | |
339 | } | |
340 | ||
e56a7885 PBG |
341 | lp = dev->priv; |
342 | /* This points to the transport private data. It's still clear, but we | |
343 | * must memset it to 0 *now*. Let's help the drivers. */ | |
344 | memset(lp, 0, size); | |
345 | ||
1da177e4 LT |
346 | /* sysfs register */ |
347 | if (!driver_registered) { | |
3ae5eaec | 348 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
349 | driver_registered = 1; |
350 | } | |
351 | device->pdev.id = n; | |
352 | device->pdev.name = DRIVER_NAME; | |
353 | platform_device_register(&device->pdev); | |
354 | SET_NETDEV_DEV(dev,&device->pdev.dev); | |
355 | ||
356 | /* If this name ends up conflicting with an existing registered | |
357 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
358 | * and fail. | |
359 | */ | |
360 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); | |
361 | device->dev = dev; | |
362 | ||
363 | (*transport->kern->init)(dev, init); | |
364 | ||
365 | dev->mtu = transport->user->max_packet; | |
366 | dev->open = uml_net_open; | |
367 | dev->hard_start_xmit = uml_net_start_xmit; | |
368 | dev->stop = uml_net_close; | |
369 | dev->get_stats = uml_net_get_stats; | |
370 | dev->set_multicast_list = uml_net_set_multicast_list; | |
371 | dev->tx_timeout = uml_net_tx_timeout; | |
372 | dev->set_mac_address = uml_net_set_mac; | |
373 | dev->change_mtu = uml_net_change_mtu; | |
6d387484 | 374 | dev->ethtool_ops = ¨_net_ethtool_ops; |
1da177e4 LT |
375 | dev->watchdog_timeo = (HZ >> 1); |
376 | dev->irq = UM_ETH_IRQ; | |
377 | ||
378 | rtnl_lock(); | |
379 | err = register_netdevice(dev); | |
380 | rtnl_unlock(); | |
381 | if (err) { | |
382 | device->dev = NULL; | |
383 | /* XXX: should we call ->remove() here? */ | |
384 | free_netdev(dev); | |
385 | return 1; | |
386 | } | |
1da177e4 LT |
387 | |
388 | /* lp.user is the first four bytes of the transport data, which | |
389 | * has already been initialized. This structure assignment will | |
390 | * overwrite that, so we make sure that .user gets overwritten with | |
391 | * what it already has. | |
392 | */ | |
393 | save = lp->user[0]; | |
394 | *lp = ((struct uml_net_private) | |
395 | { .list = LIST_HEAD_INIT(lp->list), | |
396 | .dev = dev, | |
397 | .fd = -1, | |
398 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
399 | .have_mac = device->have_mac, | |
400 | .protocol = transport->kern->protocol, | |
401 | .open = transport->user->open, | |
402 | .close = transport->user->close, | |
403 | .remove = transport->user->remove, | |
404 | .read = transport->kern->read, | |
405 | .write = transport->kern->write, | |
406 | .add_address = transport->user->add_address, | |
407 | .delete_address = transport->user->delete_address, | |
408 | .set_mtu = transport->user->set_mtu, | |
409 | .user = { save } }); | |
410 | ||
411 | init_timer(&lp->tl); | |
412 | spin_lock_init(&lp->lock); | |
413 | lp->tl.function = uml_net_user_timer_expire; | |
414 | if (lp->have_mac) | |
415 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); | |
416 | ||
417 | if (transport->user->init) | |
418 | (*transport->user->init)(&lp->user, dev); | |
419 | ||
420 | if (device->have_mac) | |
421 | set_ether_mac(dev, device->mac); | |
422 | ||
14d9ead0 | 423 | return 0; |
1da177e4 LT |
424 | } |
425 | ||
426 | static struct uml_net *find_device(int n) | |
427 | { | |
428 | struct uml_net *device; | |
429 | struct list_head *ele; | |
430 | ||
431 | spin_lock(&devices_lock); | |
432 | list_for_each(ele, &devices){ | |
433 | device = list_entry(ele, struct uml_net, list); | |
434 | if(device->index == n) | |
435 | goto out; | |
436 | } | |
437 | device = NULL; | |
438 | out: | |
439 | spin_unlock(&devices_lock); | |
440 | return(device); | |
441 | } | |
442 | ||
443 | static int eth_parse(char *str, int *index_out, char **str_out) | |
444 | { | |
445 | char *end; | |
446 | int n; | |
447 | ||
448 | n = simple_strtoul(str, &end, 0); | |
449 | if(end == str){ | |
450 | printk(KERN_ERR "eth_setup: Failed to parse '%s'\n", str); | |
451 | return(1); | |
452 | } | |
453 | if(n < 0){ | |
454 | printk(KERN_ERR "eth_setup: device %d is negative\n", n); | |
455 | return(1); | |
456 | } | |
457 | str = end; | |
458 | if(*str != '='){ | |
459 | printk(KERN_ERR | |
460 | "eth_setup: expected '=' after device number\n"); | |
461 | return(1); | |
462 | } | |
463 | str++; | |
464 | if(find_device(n)){ | |
465 | printk(KERN_ERR "eth_setup: Device %d already configured\n", | |
466 | n); | |
467 | return(1); | |
468 | } | |
469 | if(index_out) *index_out = n; | |
470 | *str_out = str; | |
471 | return(0); | |
472 | } | |
473 | ||
474 | struct eth_init { | |
475 | struct list_head list; | |
476 | char *init; | |
477 | int index; | |
478 | }; | |
479 | ||
480 | /* Filled in at boot time. Will need locking if the transports become | |
481 | * modular. | |
482 | */ | |
483 | struct list_head transports = LIST_HEAD_INIT(transports); | |
484 | ||
485 | /* Filled in during early boot */ | |
486 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
487 | ||
488 | static int check_transport(struct transport *transport, char *eth, int n, | |
489 | void **init_out, char **mac_out) | |
490 | { | |
491 | int len; | |
492 | ||
493 | len = strlen(transport->name); | |
494 | if(strncmp(eth, transport->name, len)) | |
495 | return(0); | |
496 | ||
497 | eth += len; | |
498 | if(*eth == ',') | |
499 | eth++; | |
500 | else if(*eth != '\0') | |
501 | return(0); | |
502 | ||
503 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
504 | if(*init_out == NULL) | |
505 | return(1); | |
506 | ||
507 | if(!transport->setup(eth, mac_out, *init_out)){ | |
508 | kfree(*init_out); | |
509 | *init_out = NULL; | |
510 | } | |
511 | return(1); | |
512 | } | |
513 | ||
514 | void register_transport(struct transport *new) | |
515 | { | |
516 | struct list_head *ele, *next; | |
517 | struct eth_init *eth; | |
518 | void *init; | |
519 | char *mac = NULL; | |
520 | int match; | |
521 | ||
522 | list_add(&new->list, &transports); | |
523 | ||
524 | list_for_each_safe(ele, next, ð_cmd_line){ | |
525 | eth = list_entry(ele, struct eth_init, list); | |
526 | match = check_transport(new, eth->init, eth->index, &init, | |
527 | &mac); | |
528 | if(!match) | |
529 | continue; | |
530 | else if(init != NULL){ | |
531 | eth_configure(eth->index, init, mac, new); | |
532 | kfree(init); | |
533 | } | |
534 | list_del(ð->list); | |
535 | } | |
536 | } | |
537 | ||
538 | static int eth_setup_common(char *str, int index) | |
539 | { | |
540 | struct list_head *ele; | |
541 | struct transport *transport; | |
542 | void *init; | |
543 | char *mac = NULL; | |
544 | ||
545 | list_for_each(ele, &transports){ | |
546 | transport = list_entry(ele, struct transport, list); | |
547 | if(!check_transport(transport, str, index, &init, &mac)) | |
548 | continue; | |
549 | if(init != NULL){ | |
550 | eth_configure(index, init, mac, transport); | |
551 | kfree(init); | |
552 | } | |
553 | return(1); | |
554 | } | |
555 | return(0); | |
556 | } | |
557 | ||
558 | static int eth_setup(char *str) | |
559 | { | |
560 | struct eth_init *new; | |
561 | int n, err; | |
562 | ||
563 | err = eth_parse(str, &n, &str); | |
1183dc94 JD |
564 | if(err) |
565 | return 1; | |
1da177e4 | 566 | |
1183dc94 | 567 | new = alloc_bootmem(sizeof(*new)); |
1da177e4 LT |
568 | if (new == NULL){ |
569 | printk("eth_init : alloc_bootmem failed\n"); | |
1183dc94 | 570 | return 1; |
1da177e4 LT |
571 | } |
572 | ||
573 | INIT_LIST_HEAD(&new->list); | |
574 | new->index = n; | |
575 | new->init = str; | |
576 | ||
577 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 578 | return 1; |
1da177e4 LT |
579 | } |
580 | ||
581 | __setup("eth", eth_setup); | |
582 | __uml_help(eth_setup, | |
583 | "eth[0-9]+=<transport>,<options>\n" | |
584 | " Configure a network device.\n\n" | |
585 | ); | |
586 | ||
587 | #if 0 | |
588 | static int eth_init(void) | |
589 | { | |
590 | struct list_head *ele, *next; | |
591 | struct eth_init *eth; | |
592 | ||
593 | list_for_each_safe(ele, next, ð_cmd_line){ | |
594 | eth = list_entry(ele, struct eth_init, list); | |
595 | ||
596 | if(eth_setup_common(eth->init, eth->index)) | |
597 | list_del(ð->list); | |
598 | } | |
599 | ||
600 | return(1); | |
601 | } | |
602 | __initcall(eth_init); | |
603 | #endif | |
604 | ||
605 | static int net_config(char *str) | |
606 | { | |
607 | int n, err; | |
608 | ||
609 | err = eth_parse(str, &n, &str); | |
610 | if(err) return(err); | |
611 | ||
970d6e3a | 612 | str = kstrdup(str, GFP_KERNEL); |
1da177e4 LT |
613 | if(str == NULL){ |
614 | printk(KERN_ERR "net_config failed to strdup string\n"); | |
615 | return(-1); | |
616 | } | |
617 | err = !eth_setup_common(str, n); | |
618 | if(err) | |
619 | kfree(str); | |
620 | return(err); | |
621 | } | |
622 | ||
29d56cfe JD |
623 | static int net_id(char **str, int *start_out, int *end_out) |
624 | { | |
625 | char *end; | |
626 | int n; | |
627 | ||
628 | n = simple_strtoul(*str, &end, 0); | |
629 | if((*end != '\0') || (end == *str)) | |
630 | return -1; | |
631 | ||
632 | *start_out = n; | |
633 | *end_out = n; | |
634 | *str = end; | |
635 | return n; | |
636 | } | |
637 | ||
638 | static int net_remove(int n) | |
1da177e4 LT |
639 | { |
640 | struct uml_net *device; | |
641 | struct net_device *dev; | |
642 | struct uml_net_private *lp; | |
1da177e4 LT |
643 | |
644 | device = find_device(n); | |
645 | if(device == NULL) | |
29d56cfe | 646 | return -ENODEV; |
1da177e4 LT |
647 | |
648 | dev = device->dev; | |
649 | lp = dev->priv; | |
29d56cfe JD |
650 | if(lp->fd > 0) |
651 | return -EBUSY; | |
1da177e4 LT |
652 | if(lp->remove != NULL) (*lp->remove)(&lp->user); |
653 | unregister_netdev(dev); | |
654 | platform_device_unregister(&device->pdev); | |
655 | ||
656 | list_del(&device->list); | |
657 | kfree(device); | |
658 | free_netdev(dev); | |
29d56cfe | 659 | return 0; |
1da177e4 LT |
660 | } |
661 | ||
662 | static struct mc_device net_mc = { | |
663 | .name = "eth", | |
664 | .config = net_config, | |
665 | .get_config = NULL, | |
29d56cfe | 666 | .id = net_id, |
1da177e4 LT |
667 | .remove = net_remove, |
668 | }; | |
669 | ||
670 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, | |
671 | void *ptr) | |
672 | { | |
673 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
674 | struct net_device *dev = ifa->ifa_dev->dev; |
675 | struct uml_net_private *lp; | |
676 | void (*proc)(unsigned char *, unsigned char *, void *); | |
677 | unsigned char addr_buf[4], netmask_buf[4]; | |
678 | ||
679 | if(dev->open != uml_net_open) return(NOTIFY_DONE); | |
680 | ||
681 | lp = dev->priv; | |
682 | ||
683 | proc = NULL; | |
684 | switch (event){ | |
685 | case NETDEV_UP: | |
686 | proc = lp->add_address; | |
687 | break; | |
688 | case NETDEV_DOWN: | |
689 | proc = lp->delete_address; | |
690 | break; | |
691 | } | |
692 | if(proc != NULL){ | |
0e76422c BS |
693 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
694 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
695 | (*proc)(addr_buf, netmask_buf, &lp->user); |
696 | } | |
697 | return(NOTIFY_DONE); | |
698 | } | |
699 | ||
700 | struct notifier_block uml_inetaddr_notifier = { | |
701 | .notifier_call = uml_inetaddr_event, | |
702 | }; | |
703 | ||
704 | static int uml_net_init(void) | |
705 | { | |
706 | struct list_head *ele; | |
707 | struct uml_net_private *lp; | |
708 | struct in_device *ip; | |
709 | struct in_ifaddr *in; | |
710 | ||
711 | mconsole_register_dev(&net_mc); | |
712 | register_inetaddr_notifier(¨_inetaddr_notifier); | |
713 | ||
714 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
715 | * didn't get a chance to run for them. This fakes it so that | |
716 | * addresses which have already been set up get handled properly. | |
717 | */ | |
718 | list_for_each(ele, &opened){ | |
719 | lp = list_entry(ele, struct uml_net_private, list); | |
720 | ip = lp->dev->ip_ptr; | |
721 | if(ip == NULL) continue; | |
722 | in = ip->ifa_list; | |
723 | while(in != NULL){ | |
724 | uml_inetaddr_event(NULL, NETDEV_UP, in); | |
725 | in = in->ifa_next; | |
726 | } | |
727 | } | |
728 | ||
729 | return(0); | |
730 | } | |
731 | ||
732 | __initcall(uml_net_init); | |
733 | ||
734 | static void close_devices(void) | |
735 | { | |
736 | struct list_head *ele; | |
737 | struct uml_net_private *lp; | |
738 | ||
739 | list_for_each(ele, &opened){ | |
740 | lp = list_entry(ele, struct uml_net_private, list); | |
8d93c700 | 741 | free_irq(lp->dev->irq, lp->dev); |
1da177e4 LT |
742 | if((lp->close != NULL) && (lp->fd >= 0)) |
743 | (*lp->close)(lp->fd, &lp->user); | |
744 | if(lp->remove != NULL) (*lp->remove)(&lp->user); | |
745 | } | |
746 | } | |
747 | ||
748 | __uml_exitcall(close_devices); | |
749 | ||
750 | int setup_etheraddr(char *str, unsigned char *addr) | |
751 | { | |
752 | char *end; | |
753 | int i; | |
754 | ||
755 | if(str == NULL) | |
756 | return(0); | |
757 | for(i=0;i<6;i++){ | |
758 | addr[i] = simple_strtoul(str, &end, 16); | |
759 | if((end == str) || | |
760 | ((*end != ':') && (*end != ',') && (*end != '\0'))){ | |
761 | printk(KERN_ERR | |
762 | "setup_etheraddr: failed to parse '%s' " | |
763 | "as an ethernet address\n", str); | |
764 | return(0); | |
765 | } | |
766 | str = end + 1; | |
767 | } | |
768 | if(addr[0] & 1){ | |
769 | printk(KERN_ERR | |
770 | "Attempt to assign a broadcast ethernet address to a " | |
771 | "device disallowed\n"); | |
772 | return(0); | |
773 | } | |
774 | return(1); | |
775 | } | |
776 | ||
0e76422c | 777 | void dev_ip_addr(void *d, unsigned char *bin_buf) |
1da177e4 LT |
778 | { |
779 | struct net_device *dev = d; | |
780 | struct in_device *ip = dev->ip_ptr; | |
781 | struct in_ifaddr *in; | |
1da177e4 LT |
782 | |
783 | if((ip == NULL) || ((in = ip->ifa_list) == NULL)){ | |
784 | printk(KERN_WARNING "dev_ip_addr - device not assigned an " | |
785 | "IP address\n"); | |
786 | return; | |
787 | } | |
0e76422c | 788 | memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address)); |
1da177e4 LT |
789 | } |
790 | ||
1da177e4 LT |
791 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
792 | { | |
793 | if((skb != NULL) && (skb_tailroom(skb) < extra)){ | |
794 | struct sk_buff *skb2; | |
795 | ||
796 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
797 | dev_kfree_skb(skb); | |
798 | skb = skb2; | |
799 | } | |
800 | if(skb != NULL) skb_put(skb, extra); | |
801 | return(skb); | |
802 | } | |
803 | ||
804 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, | |
805 | void *), | |
806 | void *arg) | |
807 | { | |
808 | struct net_device *dev = d; | |
809 | struct in_device *ip = dev->ip_ptr; | |
810 | struct in_ifaddr *in; | |
811 | unsigned char address[4], netmask[4]; | |
812 | ||
813 | if(ip == NULL) return; | |
814 | in = ip->ifa_list; | |
815 | while(in != NULL){ | |
0e76422c BS |
816 | memcpy(address, &in->ifa_address, sizeof(address)); |
817 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
818 | (*cb)(address, netmask, arg); |
819 | in = in->ifa_next; | |
820 | } | |
821 | } | |
822 | ||
823 | int dev_netmask(void *d, void *m) | |
824 | { | |
825 | struct net_device *dev = d; | |
826 | struct in_device *ip = dev->ip_ptr; | |
827 | struct in_ifaddr *in; | |
828 | __u32 *mask_out = m; | |
829 | ||
830 | if(ip == NULL) | |
831 | return(1); | |
832 | ||
833 | in = ip->ifa_list; | |
834 | if(in == NULL) | |
835 | return(1); | |
836 | ||
837 | *mask_out = in->ifa_mask; | |
838 | return(0); | |
839 | } | |
840 | ||
841 | void *get_output_buffer(int *len_out) | |
842 | { | |
843 | void *ret; | |
844 | ||
845 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
846 | if(ret) *len_out = PAGE_SIZE; | |
847 | else *len_out = 0; | |
848 | return(ret); | |
849 | } | |
850 | ||
851 | void free_output_buffer(void *buffer) | |
852 | { | |
853 | free_pages((unsigned long) buffer, 0); | |
854 | } | |
855 | ||
856 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, | |
857 | char **gate_addr) | |
858 | { | |
859 | char *remain; | |
860 | ||
861 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
862 | if(remain != NULL){ | |
863 | printk("tap_setup_common - Extra garbage on specification : " | |
864 | "'%s'\n", remain); | |
865 | return(1); | |
866 | } | |
867 | ||
868 | return(0); | |
869 | } | |
870 | ||
871 | unsigned short eth_protocol(struct sk_buff *skb) | |
872 | { | |
873 | return(eth_type_trans(skb, skb->dev)); | |
874 | } | |
875 | ||
876 | /* | |
877 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
878 | * Emacs will notice this stuff at the end of the file and automatically | |
879 | * adjust the settings for this buffer only. This must remain at the end | |
880 | * of the file. | |
881 | * --------------------------------------------------------------------------- | |
882 | * Local variables: | |
883 | * c-file-style: "linux" | |
884 | * End: | |
885 | */ |