Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f28169d2 | 2 | * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and |
1da177e4 LT |
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 | ||
1da177e4 LT |
8 | #include "linux/kernel.h" |
9 | #include "linux/netdevice.h" | |
10 | #include "linux/rtnetlink.h" | |
11 | #include "linux/skbuff.h" | |
12 | #include "linux/socket.h" | |
13 | #include "linux/spinlock.h" | |
14 | #include "linux/module.h" | |
15 | #include "linux/init.h" | |
16 | #include "linux/etherdevice.h" | |
17 | #include "linux/list.h" | |
18 | #include "linux/inetdevice.h" | |
19 | #include "linux/ctype.h" | |
20 | #include "linux/bootmem.h" | |
21 | #include "linux/ethtool.h" | |
d052d1be | 22 | #include "linux/platform_device.h" |
1da177e4 | 23 | #include "asm/uaccess.h" |
1da177e4 LT |
24 | #include "kern_util.h" |
25 | #include "net_kern.h" | |
26 | #include "net_user.h" | |
27 | #include "mconsole_kern.h" | |
28 | #include "init.h" | |
29 | #include "irq_user.h" | |
30 | #include "irq_kern.h" | |
31 | ||
bf61f50d PBG |
32 | static inline void set_ether_mac(struct net_device *dev, unsigned char *addr) |
33 | { | |
34 | memcpy(dev->dev_addr, addr, ETH_ALEN); | |
35 | } | |
36 | ||
1da177e4 LT |
37 | #define DRIVER_NAME "uml-netdev" |
38 | ||
39 | static DEFINE_SPINLOCK(opened_lock); | |
9010772c | 40 | static LIST_HEAD(opened); |
1da177e4 LT |
41 | |
42 | static int uml_net_rx(struct net_device *dev) | |
43 | { | |
44 | struct uml_net_private *lp = dev->priv; | |
45 | int pkt_len; | |
46 | struct sk_buff *skb; | |
47 | ||
48 | /* If we can't allocate memory, try again next round. */ | |
49 | skb = dev_alloc_skb(dev->mtu); | |
50 | if (skb == NULL) { | |
51 | lp->stats.rx_dropped++; | |
52 | return 0; | |
53 | } | |
54 | ||
55 | skb->dev = dev; | |
56 | skb_put(skb, dev->mtu); | |
459a98ed | 57 | skb_reset_mac_header(skb); |
1da177e4 LT |
58 | pkt_len = (*lp->read)(lp->fd, &skb, lp); |
59 | ||
60 | if (pkt_len > 0) { | |
61 | skb_trim(skb, pkt_len); | |
62 | skb->protocol = (*lp->protocol)(skb); | |
63 | netif_rx(skb); | |
64 | ||
65 | lp->stats.rx_bytes += skb->len; | |
66 | lp->stats.rx_packets++; | |
67 | return pkt_len; | |
68 | } | |
69 | ||
70 | kfree_skb(skb); | |
71 | return pkt_len; | |
72 | } | |
73 | ||
eff3b634 | 74 | static void uml_dev_close(struct work_struct *work) |
71c8d4c3 | 75 | { |
eff3b634 PZ |
76 | struct uml_net_private *lp = |
77 | container_of(work, struct uml_net_private, work); | |
78 | dev_close(lp->dev); | |
71c8d4c3 PBG |
79 | } |
80 | ||
7bea96fd | 81 | irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
1da177e4 LT |
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) { | |
f28169d2 JD |
93 | printk(KERN_ERR |
94 | "Device '%s' read returned %d, shutting it down\n", | |
1da177e4 | 95 | dev->name, err); |
71c8d4c3 PBG |
96 | /* dev_close can't be called in interrupt context, and takes |
97 | * again lp->lock. | |
98 | * And dev_close() can be safely called multiple times on the | |
99 | * same device, since it tests for (dev->flags & IFF_UP). So | |
eff3b634 PZ |
100 | * there's no harm in delaying the device shutdown. |
101 | * Furthermore, the workqueue will not re-enqueue an already | |
102 | * enqueued work item. */ | |
103 | schedule_work(&lp->work); | |
1da177e4 LT |
104 | goto out; |
105 | } | |
106 | reactivate_fd(lp->fd, UM_ETH_IRQ); | |
107 | ||
71c8d4c3 | 108 | out: |
1da177e4 | 109 | spin_unlock(&lp->lock); |
4ea21cd9 | 110 | return IRQ_HANDLED; |
1da177e4 LT |
111 | } |
112 | ||
113 | static int uml_net_open(struct net_device *dev) | |
114 | { | |
115 | struct uml_net_private *lp = dev->priv; | |
1da177e4 LT |
116 | int err; |
117 | ||
1da177e4 LT |
118 | if(lp->fd >= 0){ |
119 | err = -ENXIO; | |
120 | goto out; | |
121 | } | |
122 | ||
1da177e4 LT |
123 | lp->fd = (*lp->open)(&lp->user); |
124 | if(lp->fd < 0){ | |
125 | err = lp->fd; | |
126 | goto out; | |
127 | } | |
128 | ||
129 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 130 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
131 | if(err != 0){ |
132 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); | |
1da177e4 | 133 | err = -ENETUNREACH; |
14d9ead0 | 134 | goto out_close; |
1da177e4 LT |
135 | } |
136 | ||
137 | lp->tl.data = (unsigned long) &lp->user; | |
138 | netif_start_queue(dev); | |
139 | ||
140 | /* clear buffer - it can happen that the host side of the interface | |
141 | * is full when we get here. In this case, new data is never queued, | |
142 | * SIGIOs never arrive, and the net never works. | |
143 | */ | |
144 | while((err = uml_net_rx(dev)) > 0) ; | |
145 | ||
14d9ead0 JD |
146 | spin_lock(&opened_lock); |
147 | list_add(&lp->list, &opened); | |
148 | spin_unlock(&opened_lock); | |
149 | ||
150 | return 0; | |
151 | out_close: | |
152 | if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); | |
153 | lp->fd = -1; | |
154 | out: | |
14d9ead0 | 155 | return err; |
1da177e4 LT |
156 | } |
157 | ||
158 | static int uml_net_close(struct net_device *dev) | |
159 | { | |
160 | struct uml_net_private *lp = dev->priv; | |
f28169d2 | 161 | |
1da177e4 | 162 | netif_stop_queue(dev); |
1da177e4 | 163 | |
1da177e4 LT |
164 | free_irq(dev->irq, dev); |
165 | if(lp->close != NULL) | |
166 | (*lp->close)(lp->fd, &lp->user); | |
167 | lp->fd = -1; | |
168 | ||
14d9ead0 JD |
169 | spin_lock(&opened_lock); |
170 | list_del(&lp->list); | |
171 | spin_unlock(&opened_lock); | |
172 | ||
1da177e4 LT |
173 | return 0; |
174 | } | |
175 | ||
176 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
177 | { | |
178 | struct uml_net_private *lp = dev->priv; | |
179 | unsigned long flags; | |
180 | int len; | |
181 | ||
182 | netif_stop_queue(dev); | |
183 | ||
184 | spin_lock_irqsave(&lp->lock, flags); | |
185 | ||
186 | len = (*lp->write)(lp->fd, &skb, lp); | |
187 | ||
188 | if(len == skb->len) { | |
189 | lp->stats.tx_packets++; | |
190 | lp->stats.tx_bytes += skb->len; | |
191 | dev->trans_start = jiffies; | |
192 | netif_start_queue(dev); | |
193 | ||
194 | /* this is normally done in the interrupt when tx finishes */ | |
195 | netif_wake_queue(dev); | |
f28169d2 | 196 | } |
1da177e4 LT |
197 | else if(len == 0){ |
198 | netif_start_queue(dev); | |
199 | lp->stats.tx_dropped++; | |
200 | } | |
201 | else { | |
202 | netif_start_queue(dev); | |
203 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
204 | } | |
205 | ||
206 | spin_unlock_irqrestore(&lp->lock, flags); | |
207 | ||
208 | dev_kfree_skb(skb); | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) | |
214 | { | |
215 | struct uml_net_private *lp = dev->priv; | |
216 | return &lp->stats; | |
217 | } | |
218 | ||
219 | static void uml_net_set_multicast_list(struct net_device *dev) | |
220 | { | |
221 | if (dev->flags & IFF_PROMISC) return; | |
222 | else if (dev->mc_count) dev->flags |= IFF_ALLMULTI; | |
223 | else dev->flags &= ~IFF_ALLMULTI; | |
224 | } | |
225 | ||
226 | static void uml_net_tx_timeout(struct net_device *dev) | |
227 | { | |
228 | dev->trans_start = jiffies; | |
229 | netif_wake_queue(dev); | |
230 | } | |
231 | ||
232 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
233 | { | |
234 | struct uml_net_private *lp = dev->priv; | |
235 | struct sockaddr *hwaddr = addr; | |
236 | ||
48af05ed | 237 | spin_lock_irq(&lp->lock); |
bf61f50d | 238 | set_ether_mac(dev, hwaddr->sa_data); |
48af05ed | 239 | spin_unlock_irq(&lp->lock); |
1da177e4 | 240 | |
4ea21cd9 | 241 | return 0; |
1da177e4 LT |
242 | } |
243 | ||
244 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
245 | { | |
246 | struct uml_net_private *lp = dev->priv; | |
247 | int err = 0; | |
248 | ||
48af05ed | 249 | spin_lock_irq(&lp->lock); |
1da177e4 LT |
250 | |
251 | new_mtu = (*lp->set_mtu)(new_mtu, &lp->user); | |
252 | if(new_mtu < 0){ | |
253 | err = new_mtu; | |
254 | goto out; | |
255 | } | |
256 | ||
257 | dev->mtu = new_mtu; | |
258 | ||
259 | out: | |
48af05ed | 260 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
261 | return err; |
262 | } | |
263 | ||
6d387484 CH |
264 | static void uml_net_get_drvinfo(struct net_device *dev, |
265 | struct ethtool_drvinfo *info) | |
1da177e4 | 266 | { |
6d387484 CH |
267 | strcpy(info->driver, DRIVER_NAME); |
268 | strcpy(info->version, "42"); | |
1da177e4 LT |
269 | } |
270 | ||
6d387484 CH |
271 | static struct ethtool_ops uml_net_ethtool_ops = { |
272 | .get_drvinfo = uml_net_get_drvinfo, | |
273 | .get_link = ethtool_op_get_link, | |
274 | }; | |
275 | ||
1da177e4 LT |
276 | void uml_net_user_timer_expire(unsigned long _conn) |
277 | { | |
278 | #ifdef undef | |
279 | struct connection *conn = (struct connection *)_conn; | |
280 | ||
281 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
282 | do_connect(conn); | |
283 | #endif | |
284 | } | |
285 | ||
e024715f | 286 | static void setup_etheraddr(char *str, unsigned char *addr, char *name) |
b10aeeef JD |
287 | { |
288 | char *end; | |
289 | int i; | |
290 | ||
291 | if(str == NULL) | |
292 | goto random; | |
293 | ||
294 | for(i=0;i<6;i++){ | |
295 | addr[i] = simple_strtoul(str, &end, 16); | |
296 | if((end == str) || | |
297 | ((*end != ':') && (*end != ',') && (*end != '\0'))){ | |
298 | printk(KERN_ERR | |
299 | "setup_etheraddr: failed to parse '%s' " | |
300 | "as an ethernet address\n", str); | |
301 | goto random; | |
302 | } | |
303 | str = end + 1; | |
304 | } | |
e024715f | 305 | if (is_multicast_ether_addr(addr)) { |
b10aeeef | 306 | printk(KERN_ERR |
e024715f | 307 | "Attempt to assign a multicast ethernet address to a " |
b10aeeef JD |
308 | "device disallowed\n"); |
309 | goto random; | |
310 | } | |
e024715f PBG |
311 | if (!is_valid_ether_addr(addr)) { |
312 | printk(KERN_ERR | |
313 | "Attempt to assign an invalid ethernet address to a " | |
314 | "device disallowed\n"); | |
315 | goto random; | |
316 | } | |
317 | if (!is_local_ether_addr(addr)) { | |
318 | printk(KERN_WARNING | |
319 | "Warning: attempt to assign a globally valid ethernet address to a " | |
320 | "device\n"); | |
321 | printk(KERN_WARNING "You should better enable the 2nd rightmost bit " | |
322 | "in the first byte of the MAC, i.e. " | |
323 | "%02x:%02x:%02x:%02x:%02x:%02x\n", | |
324 | addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4], addr[5]); | |
325 | } | |
b10aeeef JD |
326 | return; |
327 | ||
328 | random: | |
e024715f PBG |
329 | printk(KERN_INFO |
330 | "Choosing a random ethernet address for device %s\n", name); | |
d6c64102 | 331 | random_ether_addr(addr); |
b10aeeef JD |
332 | } |
333 | ||
1da177e4 | 334 | static DEFINE_SPINLOCK(devices_lock); |
9010772c | 335 | static LIST_HEAD(devices); |
1da177e4 | 336 | |
3ae5eaec RK |
337 | static struct platform_driver uml_net_driver = { |
338 | .driver = { | |
339 | .name = DRIVER_NAME, | |
340 | }, | |
1da177e4 LT |
341 | }; |
342 | static int driver_registered; | |
343 | ||
f34d9d2d JD |
344 | static void eth_configure(int n, void *init, char *mac, |
345 | struct transport *transport) | |
1da177e4 LT |
346 | { |
347 | struct uml_net *device; | |
348 | struct net_device *dev; | |
349 | struct uml_net_private *lp; | |
350 | int save, err, size; | |
351 | ||
f28169d2 | 352 | size = transport->private_size + sizeof(struct uml_net_private) + |
1da177e4 LT |
353 | sizeof(((struct uml_net_private *) 0)->user); |
354 | ||
0268bd0a | 355 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
1da177e4 | 356 | if (device == NULL) { |
8c840835 PBG |
357 | printk(KERN_ERR "eth_configure failed to allocate struct " |
358 | "uml_net\n"); | |
f34d9d2d | 359 | return; |
1da177e4 LT |
360 | } |
361 | ||
8c840835 PBG |
362 | dev = alloc_etherdev(size); |
363 | if (dev == NULL) { | |
364 | printk(KERN_ERR "eth_configure: failed to allocate struct " | |
365 | "net_device for eth%d\n", n); | |
366 | goto out_free_device; | |
367 | } | |
368 | ||
1da177e4 LT |
369 | INIT_LIST_HEAD(&device->list); |
370 | device->index = n; | |
371 | ||
e024715f PBG |
372 | /* If this name ends up conflicting with an existing registered |
373 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
374 | * and fail. | |
375 | */ | |
8c840835 | 376 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
e024715f | 377 | |
8c840835 | 378 | setup_etheraddr(mac, device->mac, dev->name); |
1da177e4 LT |
379 | |
380 | printk(KERN_INFO "Netdevice %d ", n); | |
b10aeeef JD |
381 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", |
382 | device->mac[0], device->mac[1], | |
383 | device->mac[2], device->mac[3], | |
384 | device->mac[4], device->mac[5]); | |
1da177e4 | 385 | printk(": "); |
1da177e4 | 386 | |
e56a7885 PBG |
387 | lp = dev->priv; |
388 | /* This points to the transport private data. It's still clear, but we | |
389 | * must memset it to 0 *now*. Let's help the drivers. */ | |
390 | memset(lp, 0, size); | |
eff3b634 | 391 | INIT_WORK(&lp->work, uml_dev_close); |
e56a7885 | 392 | |
1da177e4 LT |
393 | /* sysfs register */ |
394 | if (!driver_registered) { | |
3ae5eaec | 395 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
396 | driver_registered = 1; |
397 | } | |
398 | device->pdev.id = n; | |
399 | device->pdev.name = DRIVER_NAME; | |
f34d9d2d JD |
400 | if(platform_device_register(&device->pdev)) |
401 | goto out_free_netdev; | |
1da177e4 LT |
402 | SET_NETDEV_DEV(dev,&device->pdev.dev); |
403 | ||
1da177e4 LT |
404 | device->dev = dev; |
405 | ||
f34d9d2d JD |
406 | /* |
407 | * These just fill in a data structure, so there's no failure | |
408 | * to be worried about. | |
409 | */ | |
1da177e4 LT |
410 | (*transport->kern->init)(dev, init); |
411 | ||
1da177e4 LT |
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 | 438 | |
f34d9d2d JD |
439 | if ((transport->user->init != NULL) && |
440 | ((*transport->user->init)(&lp->user, dev) != 0)) | |
441 | goto out_unregister; | |
1da177e4 | 442 | |
b10aeeef | 443 | set_ether_mac(dev, device->mac); |
f34d9d2d JD |
444 | dev->mtu = transport->user->max_packet; |
445 | dev->open = uml_net_open; | |
446 | dev->hard_start_xmit = uml_net_start_xmit; | |
447 | dev->stop = uml_net_close; | |
448 | dev->get_stats = uml_net_get_stats; | |
449 | dev->set_multicast_list = uml_net_set_multicast_list; | |
450 | dev->tx_timeout = uml_net_tx_timeout; | |
451 | dev->set_mac_address = uml_net_set_mac; | |
452 | dev->change_mtu = uml_net_change_mtu; | |
453 | dev->ethtool_ops = ¨_net_ethtool_ops; | |
454 | dev->watchdog_timeo = (HZ >> 1); | |
455 | dev->irq = UM_ETH_IRQ; | |
1da177e4 | 456 | |
f34d9d2d JD |
457 | rtnl_lock(); |
458 | err = register_netdevice(dev); | |
459 | rtnl_unlock(); | |
460 | if (err) | |
461 | goto out_undo_user_init; | |
462 | ||
463 | spin_lock(&devices_lock); | |
464 | list_add(&device->list, &devices); | |
465 | spin_unlock(&devices_lock); | |
466 | ||
467 | return; | |
468 | ||
469 | out_undo_user_init: | |
8c840835 | 470 | if (transport->user->remove != NULL) |
f34d9d2d JD |
471 | (*transport->user->remove)(&lp->user); |
472 | out_unregister: | |
473 | platform_device_unregister(&device->pdev); | |
474 | out_free_netdev: | |
475 | free_netdev(dev); | |
8c840835 | 476 | out_free_device: |
f34d9d2d | 477 | kfree(device); |
1da177e4 LT |
478 | } |
479 | ||
480 | static struct uml_net *find_device(int n) | |
481 | { | |
482 | struct uml_net *device; | |
483 | struct list_head *ele; | |
484 | ||
485 | spin_lock(&devices_lock); | |
486 | list_for_each(ele, &devices){ | |
487 | device = list_entry(ele, struct uml_net, list); | |
488 | if(device->index == n) | |
489 | goto out; | |
490 | } | |
491 | device = NULL; | |
492 | out: | |
493 | spin_unlock(&devices_lock); | |
4ea21cd9 | 494 | return device; |
1da177e4 LT |
495 | } |
496 | ||
f28169d2 JD |
497 | static int eth_parse(char *str, int *index_out, char **str_out, |
498 | char **error_out) | |
1da177e4 LT |
499 | { |
500 | char *end; | |
f28169d2 | 501 | int n, err = -EINVAL;; |
1da177e4 LT |
502 | |
503 | n = simple_strtoul(str, &end, 0); | |
504 | if(end == str){ | |
f28169d2 JD |
505 | *error_out = "Bad device number"; |
506 | return err; | |
1da177e4 | 507 | } |
f28169d2 | 508 | |
1da177e4 LT |
509 | str = end; |
510 | if(*str != '='){ | |
f28169d2 JD |
511 | *error_out = "Expected '=' after device number"; |
512 | return err; | |
1da177e4 | 513 | } |
f28169d2 | 514 | |
1da177e4 LT |
515 | str++; |
516 | if(find_device(n)){ | |
f28169d2 JD |
517 | *error_out = "Device already configured"; |
518 | return err; | |
1da177e4 | 519 | } |
f28169d2 JD |
520 | |
521 | *index_out = n; | |
1da177e4 | 522 | *str_out = str; |
f28169d2 | 523 | return 0; |
1da177e4 LT |
524 | } |
525 | ||
526 | struct eth_init { | |
527 | struct list_head list; | |
528 | char *init; | |
529 | int index; | |
530 | }; | |
531 | ||
d3b7f69d JD |
532 | static DEFINE_SPINLOCK(transports_lock); |
533 | static LIST_HEAD(transports); | |
1da177e4 LT |
534 | |
535 | /* Filled in during early boot */ | |
c862fc32 | 536 | static LIST_HEAD(eth_cmd_line); |
1da177e4 LT |
537 | |
538 | static int check_transport(struct transport *transport, char *eth, int n, | |
539 | void **init_out, char **mac_out) | |
540 | { | |
541 | int len; | |
542 | ||
543 | len = strlen(transport->name); | |
544 | if(strncmp(eth, transport->name, len)) | |
4ea21cd9 | 545 | return 0; |
1da177e4 LT |
546 | |
547 | eth += len; | |
548 | if(*eth == ',') | |
549 | eth++; | |
550 | else if(*eth != '\0') | |
4ea21cd9 | 551 | return 0; |
1da177e4 LT |
552 | |
553 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
554 | if(*init_out == NULL) | |
4ea21cd9 | 555 | return 1; |
1da177e4 LT |
556 | |
557 | if(!transport->setup(eth, mac_out, *init_out)){ | |
558 | kfree(*init_out); | |
559 | *init_out = NULL; | |
560 | } | |
4ea21cd9 | 561 | return 1; |
1da177e4 LT |
562 | } |
563 | ||
564 | void register_transport(struct transport *new) | |
565 | { | |
566 | struct list_head *ele, *next; | |
567 | struct eth_init *eth; | |
568 | void *init; | |
569 | char *mac = NULL; | |
570 | int match; | |
571 | ||
d3b7f69d JD |
572 | spin_lock(&transports_lock); |
573 | BUG_ON(!list_empty(&new->list)); | |
1da177e4 | 574 | list_add(&new->list, &transports); |
d3b7f69d | 575 | spin_unlock(&transports_lock); |
1da177e4 LT |
576 | |
577 | list_for_each_safe(ele, next, ð_cmd_line){ | |
578 | eth = list_entry(ele, struct eth_init, list); | |
579 | match = check_transport(new, eth->init, eth->index, &init, | |
580 | &mac); | |
581 | if(!match) | |
582 | continue; | |
583 | else if(init != NULL){ | |
584 | eth_configure(eth->index, init, mac, new); | |
585 | kfree(init); | |
586 | } | |
587 | list_del(ð->list); | |
588 | } | |
589 | } | |
590 | ||
591 | static int eth_setup_common(char *str, int index) | |
592 | { | |
593 | struct list_head *ele; | |
594 | struct transport *transport; | |
595 | void *init; | |
596 | char *mac = NULL; | |
c862fc32 | 597 | int found = 0; |
1da177e4 | 598 | |
c862fc32 | 599 | spin_lock(&transports_lock); |
1da177e4 LT |
600 | list_for_each(ele, &transports){ |
601 | transport = list_entry(ele, struct transport, list); | |
602 | if(!check_transport(transport, str, index, &init, &mac)) | |
603 | continue; | |
604 | if(init != NULL){ | |
605 | eth_configure(index, init, mac, transport); | |
606 | kfree(init); | |
607 | } | |
c862fc32 JD |
608 | found = 1; |
609 | break; | |
1da177e4 | 610 | } |
c862fc32 JD |
611 | |
612 | spin_unlock(&transports_lock); | |
613 | return found; | |
1da177e4 LT |
614 | } |
615 | ||
616 | static int eth_setup(char *str) | |
617 | { | |
618 | struct eth_init *new; | |
f28169d2 | 619 | char *error; |
1da177e4 LT |
620 | int n, err; |
621 | ||
f28169d2 JD |
622 | err = eth_parse(str, &n, &str, &error); |
623 | if(err){ | |
624 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", | |
625 | str, error); | |
1183dc94 | 626 | return 1; |
f28169d2 | 627 | } |
1da177e4 | 628 | |
1183dc94 | 629 | new = alloc_bootmem(sizeof(*new)); |
1da177e4 LT |
630 | if (new == NULL){ |
631 | printk("eth_init : alloc_bootmem failed\n"); | |
1183dc94 | 632 | return 1; |
1da177e4 LT |
633 | } |
634 | ||
635 | INIT_LIST_HEAD(&new->list); | |
636 | new->index = n; | |
637 | new->init = str; | |
638 | ||
639 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 640 | return 1; |
1da177e4 LT |
641 | } |
642 | ||
643 | __setup("eth", eth_setup); | |
644 | __uml_help(eth_setup, | |
645 | "eth[0-9]+=<transport>,<options>\n" | |
646 | " Configure a network device.\n\n" | |
647 | ); | |
648 | ||
f28169d2 | 649 | static int net_config(char *str, char **error_out) |
1da177e4 LT |
650 | { |
651 | int n, err; | |
652 | ||
f28169d2 JD |
653 | err = eth_parse(str, &n, &str, error_out); |
654 | if(err) | |
655 | return err; | |
1da177e4 | 656 | |
f28169d2 JD |
657 | /* This string is broken up and the pieces used by the underlying |
658 | * driver. So, it is freed only if eth_setup_common fails. | |
659 | */ | |
970d6e3a | 660 | str = kstrdup(str, GFP_KERNEL); |
1da177e4 | 661 | if(str == NULL){ |
f28169d2 JD |
662 | *error_out = "net_config failed to strdup string"; |
663 | return -ENOMEM; | |
1da177e4 LT |
664 | } |
665 | err = !eth_setup_common(str, n); | |
f28169d2 | 666 | if(err) |
1da177e4 LT |
667 | kfree(str); |
668 | return(err); | |
669 | } | |
670 | ||
29d56cfe JD |
671 | static int net_id(char **str, int *start_out, int *end_out) |
672 | { | |
673 | char *end; | |
674 | int n; | |
675 | ||
676 | n = simple_strtoul(*str, &end, 0); | |
677 | if((*end != '\0') || (end == *str)) | |
678 | return -1; | |
679 | ||
680 | *start_out = n; | |
681 | *end_out = n; | |
682 | *str = end; | |
683 | return n; | |
684 | } | |
685 | ||
f28169d2 | 686 | static int net_remove(int n, char **error_out) |
1da177e4 LT |
687 | { |
688 | struct uml_net *device; | |
689 | struct net_device *dev; | |
690 | struct uml_net_private *lp; | |
1da177e4 LT |
691 | |
692 | device = find_device(n); | |
693 | if(device == NULL) | |
29d56cfe | 694 | return -ENODEV; |
1da177e4 LT |
695 | |
696 | dev = device->dev; | |
697 | lp = dev->priv; | |
29d56cfe | 698 | if(lp->fd > 0) |
4ea21cd9 | 699 | return -EBUSY; |
1da177e4 LT |
700 | if(lp->remove != NULL) (*lp->remove)(&lp->user); |
701 | unregister_netdev(dev); | |
702 | platform_device_unregister(&device->pdev); | |
703 | ||
704 | list_del(&device->list); | |
705 | kfree(device); | |
706 | free_netdev(dev); | |
29d56cfe | 707 | return 0; |
1da177e4 LT |
708 | } |
709 | ||
710 | static struct mc_device net_mc = { | |
84f48d4f | 711 | .list = LIST_HEAD_INIT(net_mc.list), |
1da177e4 LT |
712 | .name = "eth", |
713 | .config = net_config, | |
714 | .get_config = NULL, | |
4ea21cd9 | 715 | .id = net_id, |
1da177e4 LT |
716 | .remove = net_remove, |
717 | }; | |
718 | ||
719 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, | |
720 | void *ptr) | |
721 | { | |
722 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
723 | struct net_device *dev = ifa->ifa_dev->dev; |
724 | struct uml_net_private *lp; | |
725 | void (*proc)(unsigned char *, unsigned char *, void *); | |
726 | unsigned char addr_buf[4], netmask_buf[4]; | |
727 | ||
4ea21cd9 JD |
728 | if(dev->open != uml_net_open) |
729 | return NOTIFY_DONE; | |
1da177e4 LT |
730 | |
731 | lp = dev->priv; | |
732 | ||
733 | proc = NULL; | |
734 | switch (event){ | |
735 | case NETDEV_UP: | |
736 | proc = lp->add_address; | |
737 | break; | |
738 | case NETDEV_DOWN: | |
739 | proc = lp->delete_address; | |
740 | break; | |
741 | } | |
742 | if(proc != NULL){ | |
0e76422c BS |
743 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
744 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
745 | (*proc)(addr_buf, netmask_buf, &lp->user); |
746 | } | |
4ea21cd9 | 747 | return NOTIFY_DONE; |
1da177e4 LT |
748 | } |
749 | ||
c862fc32 | 750 | /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
1da177e4 LT |
751 | struct notifier_block uml_inetaddr_notifier = { |
752 | .notifier_call = uml_inetaddr_event, | |
753 | }; | |
754 | ||
755 | static int uml_net_init(void) | |
756 | { | |
757 | struct list_head *ele; | |
f28169d2 | 758 | struct uml_net_private *lp; |
1da177e4 LT |
759 | struct in_device *ip; |
760 | struct in_ifaddr *in; | |
761 | ||
762 | mconsole_register_dev(&net_mc); | |
763 | register_inetaddr_notifier(¨_inetaddr_notifier); | |
764 | ||
765 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
766 | * didn't get a chance to run for them. This fakes it so that | |
767 | * addresses which have already been set up get handled properly. | |
768 | */ | |
c862fc32 | 769 | spin_lock(&opened_lock); |
1da177e4 LT |
770 | list_for_each(ele, &opened){ |
771 | lp = list_entry(ele, struct uml_net_private, list); | |
772 | ip = lp->dev->ip_ptr; | |
c862fc32 JD |
773 | if(ip == NULL) |
774 | continue; | |
1da177e4 LT |
775 | in = ip->ifa_list; |
776 | while(in != NULL){ | |
777 | uml_inetaddr_event(NULL, NETDEV_UP, in); | |
778 | in = in->ifa_next; | |
779 | } | |
f28169d2 | 780 | } |
c862fc32 | 781 | spin_unlock(&opened_lock); |
1da177e4 | 782 | |
c862fc32 | 783 | return 0; |
1da177e4 LT |
784 | } |
785 | ||
786 | __initcall(uml_net_init); | |
787 | ||
788 | static void close_devices(void) | |
789 | { | |
790 | struct list_head *ele; | |
791 | struct uml_net_private *lp; | |
792 | ||
c862fc32 | 793 | spin_lock(&opened_lock); |
1da177e4 LT |
794 | list_for_each(ele, &opened){ |
795 | lp = list_entry(ele, struct uml_net_private, list); | |
8d93c700 | 796 | free_irq(lp->dev->irq, lp->dev); |
1da177e4 LT |
797 | if((lp->close != NULL) && (lp->fd >= 0)) |
798 | (*lp->close)(lp->fd, &lp->user); | |
c862fc32 JD |
799 | if(lp->remove != NULL) |
800 | (*lp->remove)(&lp->user); | |
1da177e4 | 801 | } |
c862fc32 | 802 | spin_unlock(&opened_lock); |
1da177e4 LT |
803 | } |
804 | ||
805 | __uml_exitcall(close_devices); | |
806 | ||
1da177e4 LT |
807 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
808 | { | |
809 | if((skb != NULL) && (skb_tailroom(skb) < extra)){ | |
810 | struct sk_buff *skb2; | |
811 | ||
812 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
813 | dev_kfree_skb(skb); | |
814 | skb = skb2; | |
815 | } | |
816 | if(skb != NULL) skb_put(skb, extra); | |
817 | return(skb); | |
818 | } | |
819 | ||
f28169d2 JD |
820 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
821 | void *), | |
1da177e4 LT |
822 | void *arg) |
823 | { | |
824 | struct net_device *dev = d; | |
825 | struct in_device *ip = dev->ip_ptr; | |
826 | struct in_ifaddr *in; | |
827 | unsigned char address[4], netmask[4]; | |
828 | ||
829 | if(ip == NULL) return; | |
830 | in = ip->ifa_list; | |
831 | while(in != NULL){ | |
0e76422c BS |
832 | memcpy(address, &in->ifa_address, sizeof(address)); |
833 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
834 | (*cb)(address, netmask, arg); |
835 | in = in->ifa_next; | |
836 | } | |
837 | } | |
838 | ||
839 | int dev_netmask(void *d, void *m) | |
840 | { | |
841 | struct net_device *dev = d; | |
842 | struct in_device *ip = dev->ip_ptr; | |
843 | struct in_ifaddr *in; | |
a144ea4b | 844 | __be32 *mask_out = m; |
1da177e4 | 845 | |
f28169d2 | 846 | if(ip == NULL) |
1da177e4 LT |
847 | return(1); |
848 | ||
849 | in = ip->ifa_list; | |
f28169d2 | 850 | if(in == NULL) |
1da177e4 LT |
851 | return(1); |
852 | ||
853 | *mask_out = in->ifa_mask; | |
854 | return(0); | |
855 | } | |
856 | ||
857 | void *get_output_buffer(int *len_out) | |
858 | { | |
859 | void *ret; | |
860 | ||
861 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
862 | if(ret) *len_out = PAGE_SIZE; | |
863 | else *len_out = 0; | |
4ea21cd9 | 864 | return ret; |
1da177e4 LT |
865 | } |
866 | ||
867 | void free_output_buffer(void *buffer) | |
868 | { | |
869 | free_pages((unsigned long) buffer, 0); | |
870 | } | |
871 | ||
f28169d2 | 872 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
1da177e4 LT |
873 | char **gate_addr) |
874 | { | |
875 | char *remain; | |
876 | ||
877 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
878 | if(remain != NULL){ | |
879 | printk("tap_setup_common - Extra garbage on specification : " | |
880 | "'%s'\n", remain); | |
881 | return(1); | |
882 | } | |
883 | ||
884 | return(0); | |
885 | } | |
886 | ||
887 | unsigned short eth_protocol(struct sk_buff *skb) | |
888 | { | |
889 | return(eth_type_trans(skb, skb->dev)); | |
890 | } |