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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 | ||
1da177e4 LT |
122 | lp->fd = (*lp->open)(&lp->user); |
123 | if(lp->fd < 0){ | |
124 | err = lp->fd; | |
125 | goto out; | |
126 | } | |
127 | ||
128 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 129 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
130 | if(err != 0){ |
131 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); | |
1da177e4 | 132 | err = -ENETUNREACH; |
14d9ead0 | 133 | goto out_close; |
1da177e4 LT |
134 | } |
135 | ||
136 | lp->tl.data = (unsigned long) &lp->user; | |
137 | netif_start_queue(dev); | |
138 | ||
139 | /* clear buffer - it can happen that the host side of the interface | |
140 | * is full when we get here. In this case, new data is never queued, | |
141 | * SIGIOs never arrive, and the net never works. | |
142 | */ | |
143 | while((err = uml_net_rx(dev)) > 0) ; | |
144 | ||
14d9ead0 JD |
145 | spin_lock(&opened_lock); |
146 | list_add(&lp->list, &opened); | |
147 | spin_unlock(&opened_lock); | |
148 | ||
149 | return 0; | |
150 | out_close: | |
151 | if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); | |
152 | lp->fd = -1; | |
153 | out: | |
14d9ead0 | 154 | return err; |
1da177e4 LT |
155 | } |
156 | ||
157 | static int uml_net_close(struct net_device *dev) | |
158 | { | |
159 | struct uml_net_private *lp = dev->priv; | |
160 | ||
161 | netif_stop_queue(dev); | |
1da177e4 | 162 | |
1da177e4 LT |
163 | free_irq(dev->irq, dev); |
164 | if(lp->close != NULL) | |
165 | (*lp->close)(lp->fd, &lp->user); | |
166 | lp->fd = -1; | |
167 | ||
14d9ead0 JD |
168 | spin_lock(&opened_lock); |
169 | list_del(&lp->list); | |
170 | spin_unlock(&opened_lock); | |
171 | ||
1da177e4 LT |
172 | return 0; |
173 | } | |
174 | ||
175 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
176 | { | |
177 | struct uml_net_private *lp = dev->priv; | |
178 | unsigned long flags; | |
179 | int len; | |
180 | ||
181 | netif_stop_queue(dev); | |
182 | ||
183 | spin_lock_irqsave(&lp->lock, flags); | |
184 | ||
185 | len = (*lp->write)(lp->fd, &skb, lp); | |
186 | ||
187 | if(len == skb->len) { | |
188 | lp->stats.tx_packets++; | |
189 | lp->stats.tx_bytes += skb->len; | |
190 | dev->trans_start = jiffies; | |
191 | netif_start_queue(dev); | |
192 | ||
193 | /* this is normally done in the interrupt when tx finishes */ | |
194 | netif_wake_queue(dev); | |
195 | } | |
196 | else if(len == 0){ | |
197 | netif_start_queue(dev); | |
198 | lp->stats.tx_dropped++; | |
199 | } | |
200 | else { | |
201 | netif_start_queue(dev); | |
202 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
203 | } | |
204 | ||
205 | spin_unlock_irqrestore(&lp->lock, flags); | |
206 | ||
207 | dev_kfree_skb(skb); | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) | |
213 | { | |
214 | struct uml_net_private *lp = dev->priv; | |
215 | return &lp->stats; | |
216 | } | |
217 | ||
218 | static void uml_net_set_multicast_list(struct net_device *dev) | |
219 | { | |
220 | if (dev->flags & IFF_PROMISC) return; | |
221 | else if (dev->mc_count) dev->flags |= IFF_ALLMULTI; | |
222 | else dev->flags &= ~IFF_ALLMULTI; | |
223 | } | |
224 | ||
225 | static void uml_net_tx_timeout(struct net_device *dev) | |
226 | { | |
227 | dev->trans_start = jiffies; | |
228 | netif_wake_queue(dev); | |
229 | } | |
230 | ||
231 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
232 | { | |
233 | struct uml_net_private *lp = dev->priv; | |
234 | struct sockaddr *hwaddr = addr; | |
235 | ||
48af05ed | 236 | spin_lock_irq(&lp->lock); |
bf61f50d | 237 | set_ether_mac(dev, hwaddr->sa_data); |
48af05ed | 238 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
239 | |
240 | return(0); | |
241 | } | |
242 | ||
243 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
244 | { | |
245 | struct uml_net_private *lp = dev->priv; | |
246 | int err = 0; | |
247 | ||
48af05ed | 248 | spin_lock_irq(&lp->lock); |
1da177e4 LT |
249 | |
250 | new_mtu = (*lp->set_mtu)(new_mtu, &lp->user); | |
251 | if(new_mtu < 0){ | |
252 | err = new_mtu; | |
253 | goto out; | |
254 | } | |
255 | ||
256 | dev->mtu = new_mtu; | |
257 | ||
258 | out: | |
48af05ed | 259 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
260 | return err; |
261 | } | |
262 | ||
6d387484 CH |
263 | static void uml_net_get_drvinfo(struct net_device *dev, |
264 | struct ethtool_drvinfo *info) | |
1da177e4 | 265 | { |
6d387484 CH |
266 | strcpy(info->driver, DRIVER_NAME); |
267 | strcpy(info->version, "42"); | |
1da177e4 LT |
268 | } |
269 | ||
6d387484 CH |
270 | static struct ethtool_ops uml_net_ethtool_ops = { |
271 | .get_drvinfo = uml_net_get_drvinfo, | |
272 | .get_link = ethtool_op_get_link, | |
273 | }; | |
274 | ||
1da177e4 LT |
275 | void uml_net_user_timer_expire(unsigned long _conn) |
276 | { | |
277 | #ifdef undef | |
278 | struct connection *conn = (struct connection *)_conn; | |
279 | ||
280 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
281 | do_connect(conn); | |
282 | #endif | |
283 | } | |
284 | ||
b10aeeef JD |
285 | static void setup_etheraddr(char *str, unsigned char *addr) |
286 | { | |
287 | char *end; | |
288 | int i; | |
289 | ||
290 | if(str == NULL) | |
291 | goto random; | |
292 | ||
293 | for(i=0;i<6;i++){ | |
294 | addr[i] = simple_strtoul(str, &end, 16); | |
295 | if((end == str) || | |
296 | ((*end != ':') && (*end != ',') && (*end != '\0'))){ | |
297 | printk(KERN_ERR | |
298 | "setup_etheraddr: failed to parse '%s' " | |
299 | "as an ethernet address\n", str); | |
300 | goto random; | |
301 | } | |
302 | str = end + 1; | |
303 | } | |
304 | if(addr[0] & 1){ | |
305 | printk(KERN_ERR | |
306 | "Attempt to assign a broadcast ethernet address to a " | |
307 | "device disallowed\n"); | |
308 | goto random; | |
309 | } | |
310 | return; | |
311 | ||
312 | random: | |
fade5d54 | 313 | random_ether_addr(addr) |
b10aeeef JD |
314 | } |
315 | ||
1da177e4 | 316 | static DEFINE_SPINLOCK(devices_lock); |
9010772c | 317 | static LIST_HEAD(devices); |
1da177e4 | 318 | |
3ae5eaec RK |
319 | static struct platform_driver uml_net_driver = { |
320 | .driver = { | |
321 | .name = DRIVER_NAME, | |
322 | }, | |
1da177e4 LT |
323 | }; |
324 | static int driver_registered; | |
325 | ||
326 | static int eth_configure(int n, void *init, char *mac, | |
327 | struct transport *transport) | |
328 | { | |
329 | struct uml_net *device; | |
330 | struct net_device *dev; | |
331 | struct uml_net_private *lp; | |
332 | int save, err, size; | |
333 | ||
334 | size = transport->private_size + sizeof(struct uml_net_private) + | |
335 | sizeof(((struct uml_net_private *) 0)->user); | |
336 | ||
337 | device = kmalloc(sizeof(*device), GFP_KERNEL); | |
338 | if (device == NULL) { | |
339 | printk(KERN_ERR "eth_configure failed to allocate uml_net\n"); | |
340 | return(1); | |
341 | } | |
342 | ||
343 | memset(device, 0, sizeof(*device)); | |
344 | INIT_LIST_HEAD(&device->list); | |
345 | device->index = n; | |
346 | ||
347 | spin_lock(&devices_lock); | |
348 | list_add(&device->list, &devices); | |
349 | spin_unlock(&devices_lock); | |
350 | ||
b10aeeef | 351 | setup_etheraddr(mac, device->mac); |
1da177e4 LT |
352 | |
353 | printk(KERN_INFO "Netdevice %d ", n); | |
b10aeeef JD |
354 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", |
355 | device->mac[0], device->mac[1], | |
356 | device->mac[2], device->mac[3], | |
357 | device->mac[4], device->mac[5]); | |
1da177e4 LT |
358 | printk(": "); |
359 | dev = alloc_etherdev(size); | |
360 | if (dev == NULL) { | |
361 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); | |
362 | return 1; | |
363 | } | |
364 | ||
e56a7885 PBG |
365 | lp = dev->priv; |
366 | /* This points to the transport private data. It's still clear, but we | |
367 | * must memset it to 0 *now*. Let's help the drivers. */ | |
368 | memset(lp, 0, size); | |
369 | ||
1da177e4 LT |
370 | /* sysfs register */ |
371 | if (!driver_registered) { | |
3ae5eaec | 372 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
373 | driver_registered = 1; |
374 | } | |
375 | device->pdev.id = n; | |
376 | device->pdev.name = DRIVER_NAME; | |
377 | platform_device_register(&device->pdev); | |
378 | SET_NETDEV_DEV(dev,&device->pdev.dev); | |
379 | ||
380 | /* If this name ends up conflicting with an existing registered | |
381 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
382 | * and fail. | |
383 | */ | |
384 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); | |
385 | device->dev = dev; | |
386 | ||
387 | (*transport->kern->init)(dev, init); | |
388 | ||
389 | dev->mtu = transport->user->max_packet; | |
390 | dev->open = uml_net_open; | |
391 | dev->hard_start_xmit = uml_net_start_xmit; | |
392 | dev->stop = uml_net_close; | |
393 | dev->get_stats = uml_net_get_stats; | |
394 | dev->set_multicast_list = uml_net_set_multicast_list; | |
395 | dev->tx_timeout = uml_net_tx_timeout; | |
396 | dev->set_mac_address = uml_net_set_mac; | |
397 | dev->change_mtu = uml_net_change_mtu; | |
6d387484 | 398 | dev->ethtool_ops = ¨_net_ethtool_ops; |
1da177e4 LT |
399 | dev->watchdog_timeo = (HZ >> 1); |
400 | dev->irq = UM_ETH_IRQ; | |
401 | ||
402 | rtnl_lock(); | |
403 | err = register_netdevice(dev); | |
404 | rtnl_unlock(); | |
405 | if (err) { | |
406 | device->dev = NULL; | |
407 | /* XXX: should we call ->remove() here? */ | |
408 | free_netdev(dev); | |
409 | return 1; | |
410 | } | |
1da177e4 LT |
411 | |
412 | /* lp.user is the first four bytes of the transport data, which | |
413 | * has already been initialized. This structure assignment will | |
414 | * overwrite that, so we make sure that .user gets overwritten with | |
415 | * what it already has. | |
416 | */ | |
417 | save = lp->user[0]; | |
418 | *lp = ((struct uml_net_private) | |
419 | { .list = LIST_HEAD_INIT(lp->list), | |
420 | .dev = dev, | |
421 | .fd = -1, | |
422 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
1da177e4 LT |
423 | .protocol = transport->kern->protocol, |
424 | .open = transport->user->open, | |
425 | .close = transport->user->close, | |
426 | .remove = transport->user->remove, | |
427 | .read = transport->kern->read, | |
428 | .write = transport->kern->write, | |
429 | .add_address = transport->user->add_address, | |
430 | .delete_address = transport->user->delete_address, | |
431 | .set_mtu = transport->user->set_mtu, | |
432 | .user = { save } }); | |
433 | ||
434 | init_timer(&lp->tl); | |
435 | spin_lock_init(&lp->lock); | |
436 | lp->tl.function = uml_net_user_timer_expire; | |
b10aeeef | 437 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); |
1da177e4 LT |
438 | |
439 | if (transport->user->init) | |
440 | (*transport->user->init)(&lp->user, dev); | |
441 | ||
b10aeeef | 442 | set_ether_mac(dev, device->mac); |
1da177e4 | 443 | |
14d9ead0 | 444 | return 0; |
1da177e4 LT |
445 | } |
446 | ||
447 | static struct uml_net *find_device(int n) | |
448 | { | |
449 | struct uml_net *device; | |
450 | struct list_head *ele; | |
451 | ||
452 | spin_lock(&devices_lock); | |
453 | list_for_each(ele, &devices){ | |
454 | device = list_entry(ele, struct uml_net, list); | |
455 | if(device->index == n) | |
456 | goto out; | |
457 | } | |
458 | device = NULL; | |
459 | out: | |
460 | spin_unlock(&devices_lock); | |
461 | return(device); | |
462 | } | |
463 | ||
464 | static int eth_parse(char *str, int *index_out, char **str_out) | |
465 | { | |
466 | char *end; | |
467 | int n; | |
468 | ||
469 | n = simple_strtoul(str, &end, 0); | |
470 | if(end == str){ | |
471 | printk(KERN_ERR "eth_setup: Failed to parse '%s'\n", str); | |
472 | return(1); | |
473 | } | |
474 | if(n < 0){ | |
475 | printk(KERN_ERR "eth_setup: device %d is negative\n", n); | |
476 | return(1); | |
477 | } | |
478 | str = end; | |
479 | if(*str != '='){ | |
480 | printk(KERN_ERR | |
481 | "eth_setup: expected '=' after device number\n"); | |
482 | return(1); | |
483 | } | |
484 | str++; | |
485 | if(find_device(n)){ | |
486 | printk(KERN_ERR "eth_setup: Device %d already configured\n", | |
487 | n); | |
488 | return(1); | |
489 | } | |
490 | if(index_out) *index_out = n; | |
491 | *str_out = str; | |
492 | return(0); | |
493 | } | |
494 | ||
495 | struct eth_init { | |
496 | struct list_head list; | |
497 | char *init; | |
498 | int index; | |
499 | }; | |
500 | ||
501 | /* Filled in at boot time. Will need locking if the transports become | |
502 | * modular. | |
503 | */ | |
504 | struct list_head transports = LIST_HEAD_INIT(transports); | |
505 | ||
506 | /* Filled in during early boot */ | |
507 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
508 | ||
509 | static int check_transport(struct transport *transport, char *eth, int n, | |
510 | void **init_out, char **mac_out) | |
511 | { | |
512 | int len; | |
513 | ||
514 | len = strlen(transport->name); | |
515 | if(strncmp(eth, transport->name, len)) | |
516 | return(0); | |
517 | ||
518 | eth += len; | |
519 | if(*eth == ',') | |
520 | eth++; | |
521 | else if(*eth != '\0') | |
522 | return(0); | |
523 | ||
524 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
525 | if(*init_out == NULL) | |
526 | return(1); | |
527 | ||
528 | if(!transport->setup(eth, mac_out, *init_out)){ | |
529 | kfree(*init_out); | |
530 | *init_out = NULL; | |
531 | } | |
532 | return(1); | |
533 | } | |
534 | ||
535 | void register_transport(struct transport *new) | |
536 | { | |
537 | struct list_head *ele, *next; | |
538 | struct eth_init *eth; | |
539 | void *init; | |
540 | char *mac = NULL; | |
541 | int match; | |
542 | ||
543 | list_add(&new->list, &transports); | |
544 | ||
545 | list_for_each_safe(ele, next, ð_cmd_line){ | |
546 | eth = list_entry(ele, struct eth_init, list); | |
547 | match = check_transport(new, eth->init, eth->index, &init, | |
548 | &mac); | |
549 | if(!match) | |
550 | continue; | |
551 | else if(init != NULL){ | |
552 | eth_configure(eth->index, init, mac, new); | |
553 | kfree(init); | |
554 | } | |
555 | list_del(ð->list); | |
556 | } | |
557 | } | |
558 | ||
559 | static int eth_setup_common(char *str, int index) | |
560 | { | |
561 | struct list_head *ele; | |
562 | struct transport *transport; | |
563 | void *init; | |
564 | char *mac = NULL; | |
565 | ||
566 | list_for_each(ele, &transports){ | |
567 | transport = list_entry(ele, struct transport, list); | |
568 | if(!check_transport(transport, str, index, &init, &mac)) | |
569 | continue; | |
570 | if(init != NULL){ | |
571 | eth_configure(index, init, mac, transport); | |
572 | kfree(init); | |
573 | } | |
574 | return(1); | |
575 | } | |
576 | return(0); | |
577 | } | |
578 | ||
579 | static int eth_setup(char *str) | |
580 | { | |
581 | struct eth_init *new; | |
582 | int n, err; | |
583 | ||
584 | err = eth_parse(str, &n, &str); | |
1183dc94 JD |
585 | if(err) |
586 | return 1; | |
1da177e4 | 587 | |
1183dc94 | 588 | new = alloc_bootmem(sizeof(*new)); |
1da177e4 LT |
589 | if (new == NULL){ |
590 | printk("eth_init : alloc_bootmem failed\n"); | |
1183dc94 | 591 | return 1; |
1da177e4 LT |
592 | } |
593 | ||
594 | INIT_LIST_HEAD(&new->list); | |
595 | new->index = n; | |
596 | new->init = str; | |
597 | ||
598 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 599 | return 1; |
1da177e4 LT |
600 | } |
601 | ||
602 | __setup("eth", eth_setup); | |
603 | __uml_help(eth_setup, | |
604 | "eth[0-9]+=<transport>,<options>\n" | |
605 | " Configure a network device.\n\n" | |
606 | ); | |
607 | ||
608 | #if 0 | |
609 | static int eth_init(void) | |
610 | { | |
611 | struct list_head *ele, *next; | |
612 | struct eth_init *eth; | |
613 | ||
614 | list_for_each_safe(ele, next, ð_cmd_line){ | |
615 | eth = list_entry(ele, struct eth_init, list); | |
616 | ||
617 | if(eth_setup_common(eth->init, eth->index)) | |
618 | list_del(ð->list); | |
619 | } | |
620 | ||
621 | return(1); | |
622 | } | |
623 | __initcall(eth_init); | |
624 | #endif | |
625 | ||
626 | static int net_config(char *str) | |
627 | { | |
628 | int n, err; | |
629 | ||
630 | err = eth_parse(str, &n, &str); | |
631 | if(err) return(err); | |
632 | ||
970d6e3a | 633 | str = kstrdup(str, GFP_KERNEL); |
1da177e4 LT |
634 | if(str == NULL){ |
635 | printk(KERN_ERR "net_config failed to strdup string\n"); | |
636 | return(-1); | |
637 | } | |
638 | err = !eth_setup_common(str, n); | |
639 | if(err) | |
640 | kfree(str); | |
641 | return(err); | |
642 | } | |
643 | ||
29d56cfe JD |
644 | static int net_id(char **str, int *start_out, int *end_out) |
645 | { | |
646 | char *end; | |
647 | int n; | |
648 | ||
649 | n = simple_strtoul(*str, &end, 0); | |
650 | if((*end != '\0') || (end == *str)) | |
651 | return -1; | |
652 | ||
653 | *start_out = n; | |
654 | *end_out = n; | |
655 | *str = end; | |
656 | return n; | |
657 | } | |
658 | ||
659 | static int net_remove(int n) | |
1da177e4 LT |
660 | { |
661 | struct uml_net *device; | |
662 | struct net_device *dev; | |
663 | struct uml_net_private *lp; | |
1da177e4 LT |
664 | |
665 | device = find_device(n); | |
666 | if(device == NULL) | |
29d56cfe | 667 | return -ENODEV; |
1da177e4 LT |
668 | |
669 | dev = device->dev; | |
670 | lp = dev->priv; | |
29d56cfe JD |
671 | if(lp->fd > 0) |
672 | return -EBUSY; | |
1da177e4 LT |
673 | if(lp->remove != NULL) (*lp->remove)(&lp->user); |
674 | unregister_netdev(dev); | |
675 | platform_device_unregister(&device->pdev); | |
676 | ||
677 | list_del(&device->list); | |
678 | kfree(device); | |
679 | free_netdev(dev); | |
29d56cfe | 680 | return 0; |
1da177e4 LT |
681 | } |
682 | ||
683 | static struct mc_device net_mc = { | |
684 | .name = "eth", | |
685 | .config = net_config, | |
686 | .get_config = NULL, | |
29d56cfe | 687 | .id = net_id, |
1da177e4 LT |
688 | .remove = net_remove, |
689 | }; | |
690 | ||
691 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, | |
692 | void *ptr) | |
693 | { | |
694 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
695 | struct net_device *dev = ifa->ifa_dev->dev; |
696 | struct uml_net_private *lp; | |
697 | void (*proc)(unsigned char *, unsigned char *, void *); | |
698 | unsigned char addr_buf[4], netmask_buf[4]; | |
699 | ||
700 | if(dev->open != uml_net_open) return(NOTIFY_DONE); | |
701 | ||
702 | lp = dev->priv; | |
703 | ||
704 | proc = NULL; | |
705 | switch (event){ | |
706 | case NETDEV_UP: | |
707 | proc = lp->add_address; | |
708 | break; | |
709 | case NETDEV_DOWN: | |
710 | proc = lp->delete_address; | |
711 | break; | |
712 | } | |
713 | if(proc != NULL){ | |
0e76422c BS |
714 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
715 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
716 | (*proc)(addr_buf, netmask_buf, &lp->user); |
717 | } | |
718 | return(NOTIFY_DONE); | |
719 | } | |
720 | ||
721 | struct notifier_block uml_inetaddr_notifier = { | |
722 | .notifier_call = uml_inetaddr_event, | |
723 | }; | |
724 | ||
725 | static int uml_net_init(void) | |
726 | { | |
727 | struct list_head *ele; | |
728 | struct uml_net_private *lp; | |
729 | struct in_device *ip; | |
730 | struct in_ifaddr *in; | |
731 | ||
732 | mconsole_register_dev(&net_mc); | |
733 | register_inetaddr_notifier(¨_inetaddr_notifier); | |
734 | ||
735 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
736 | * didn't get a chance to run for them. This fakes it so that | |
737 | * addresses which have already been set up get handled properly. | |
738 | */ | |
739 | list_for_each(ele, &opened){ | |
740 | lp = list_entry(ele, struct uml_net_private, list); | |
741 | ip = lp->dev->ip_ptr; | |
742 | if(ip == NULL) continue; | |
743 | in = ip->ifa_list; | |
744 | while(in != NULL){ | |
745 | uml_inetaddr_event(NULL, NETDEV_UP, in); | |
746 | in = in->ifa_next; | |
747 | } | |
748 | } | |
749 | ||
750 | return(0); | |
751 | } | |
752 | ||
753 | __initcall(uml_net_init); | |
754 | ||
755 | static void close_devices(void) | |
756 | { | |
757 | struct list_head *ele; | |
758 | struct uml_net_private *lp; | |
759 | ||
760 | list_for_each(ele, &opened){ | |
761 | lp = list_entry(ele, struct uml_net_private, list); | |
8d93c700 | 762 | free_irq(lp->dev->irq, lp->dev); |
1da177e4 LT |
763 | if((lp->close != NULL) && (lp->fd >= 0)) |
764 | (*lp->close)(lp->fd, &lp->user); | |
765 | if(lp->remove != NULL) (*lp->remove)(&lp->user); | |
766 | } | |
767 | } | |
768 | ||
769 | __uml_exitcall(close_devices); | |
770 | ||
1da177e4 LT |
771 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
772 | { | |
773 | if((skb != NULL) && (skb_tailroom(skb) < extra)){ | |
774 | struct sk_buff *skb2; | |
775 | ||
776 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
777 | dev_kfree_skb(skb); | |
778 | skb = skb2; | |
779 | } | |
780 | if(skb != NULL) skb_put(skb, extra); | |
781 | return(skb); | |
782 | } | |
783 | ||
784 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, | |
785 | void *), | |
786 | void *arg) | |
787 | { | |
788 | struct net_device *dev = d; | |
789 | struct in_device *ip = dev->ip_ptr; | |
790 | struct in_ifaddr *in; | |
791 | unsigned char address[4], netmask[4]; | |
792 | ||
793 | if(ip == NULL) return; | |
794 | in = ip->ifa_list; | |
795 | while(in != NULL){ | |
0e76422c BS |
796 | memcpy(address, &in->ifa_address, sizeof(address)); |
797 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
798 | (*cb)(address, netmask, arg); |
799 | in = in->ifa_next; | |
800 | } | |
801 | } | |
802 | ||
803 | int dev_netmask(void *d, void *m) | |
804 | { | |
805 | struct net_device *dev = d; | |
806 | struct in_device *ip = dev->ip_ptr; | |
807 | struct in_ifaddr *in; | |
a144ea4b | 808 | __be32 *mask_out = m; |
1da177e4 LT |
809 | |
810 | if(ip == NULL) | |
811 | return(1); | |
812 | ||
813 | in = ip->ifa_list; | |
814 | if(in == NULL) | |
815 | return(1); | |
816 | ||
817 | *mask_out = in->ifa_mask; | |
818 | return(0); | |
819 | } | |
820 | ||
821 | void *get_output_buffer(int *len_out) | |
822 | { | |
823 | void *ret; | |
824 | ||
825 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
826 | if(ret) *len_out = PAGE_SIZE; | |
827 | else *len_out = 0; | |
828 | return(ret); | |
829 | } | |
830 | ||
831 | void free_output_buffer(void *buffer) | |
832 | { | |
833 | free_pages((unsigned long) buffer, 0); | |
834 | } | |
835 | ||
836 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, | |
837 | char **gate_addr) | |
838 | { | |
839 | char *remain; | |
840 | ||
841 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
842 | if(remain != NULL){ | |
843 | printk("tap_setup_common - Extra garbage on specification : " | |
844 | "'%s'\n", remain); | |
845 | return(1); | |
846 | } | |
847 | ||
848 | return(0); | |
849 | } | |
850 | ||
851 | unsigned short eth_protocol(struct sk_buff *skb) | |
852 | { | |
853 | return(eth_type_trans(skb, skb->dev)); | |
854 | } | |
855 | ||
856 | /* | |
857 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
858 | * Emacs will notice this stuff at the end of the file and automatically | |
859 | * adjust the settings for this buffer only. This must remain at the end | |
860 | * of the file. | |
861 | * --------------------------------------------------------------------------- | |
862 | * Local variables: | |
863 | * c-file-style: "linux" | |
864 | * End: | |
865 | */ |