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 LT |
23 | #include "asm/uaccess.h" |
24 | #include "user_util.h" | |
25 | #include "kern_util.h" | |
26 | #include "net_kern.h" | |
27 | #include "net_user.h" | |
28 | #include "mconsole_kern.h" | |
29 | #include "init.h" | |
30 | #include "irq_user.h" | |
31 | #include "irq_kern.h" | |
32 | ||
bf61f50d PBG |
33 | static inline void set_ether_mac(struct net_device *dev, unsigned char *addr) |
34 | { | |
35 | memcpy(dev->dev_addr, addr, ETH_ALEN); | |
36 | } | |
37 | ||
1da177e4 LT |
38 | #define DRIVER_NAME "uml-netdev" |
39 | ||
40 | static DEFINE_SPINLOCK(opened_lock); | |
9010772c | 41 | static LIST_HEAD(opened); |
1da177e4 LT |
42 | |
43 | static int uml_net_rx(struct net_device *dev) | |
44 | { | |
45 | struct uml_net_private *lp = dev->priv; | |
46 | int pkt_len; | |
47 | struct sk_buff *skb; | |
48 | ||
49 | /* If we can't allocate memory, try again next round. */ | |
50 | skb = dev_alloc_skb(dev->mtu); | |
51 | if (skb == NULL) { | |
52 | lp->stats.rx_dropped++; | |
53 | return 0; | |
54 | } | |
55 | ||
56 | skb->dev = dev; | |
57 | skb_put(skb, dev->mtu); | |
58 | skb->mac.raw = skb->data; | |
59 | pkt_len = (*lp->read)(lp->fd, &skb, lp); | |
60 | ||
61 | if (pkt_len > 0) { | |
62 | skb_trim(skb, pkt_len); | |
63 | skb->protocol = (*lp->protocol)(skb); | |
64 | netif_rx(skb); | |
65 | ||
66 | lp->stats.rx_bytes += skb->len; | |
67 | lp->stats.rx_packets++; | |
68 | return pkt_len; | |
69 | } | |
70 | ||
71 | kfree_skb(skb); | |
72 | return pkt_len; | |
73 | } | |
74 | ||
eff3b634 | 75 | static void uml_dev_close(struct work_struct *work) |
71c8d4c3 | 76 | { |
eff3b634 PZ |
77 | struct uml_net_private *lp = |
78 | container_of(work, struct uml_net_private, work); | |
79 | dev_close(lp->dev); | |
71c8d4c3 PBG |
80 | } |
81 | ||
7bea96fd | 82 | irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
1da177e4 LT |
83 | { |
84 | struct net_device *dev = dev_id; | |
85 | struct uml_net_private *lp = dev->priv; | |
86 | int err; | |
87 | ||
88 | if(!netif_running(dev)) | |
89 | return(IRQ_NONE); | |
90 | ||
91 | spin_lock(&lp->lock); | |
92 | while((err = uml_net_rx(dev)) > 0) ; | |
93 | if(err < 0) { | |
f28169d2 JD |
94 | printk(KERN_ERR |
95 | "Device '%s' read returned %d, shutting it down\n", | |
1da177e4 | 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 | |
eff3b634 PZ |
101 | * there's no harm in delaying the device shutdown. |
102 | * Furthermore, the workqueue will not re-enqueue an already | |
103 | * enqueued work item. */ | |
104 | schedule_work(&lp->work); | |
1da177e4 LT |
105 | goto out; |
106 | } | |
107 | reactivate_fd(lp->fd, UM_ETH_IRQ); | |
108 | ||
71c8d4c3 | 109 | out: |
1da177e4 | 110 | spin_unlock(&lp->lock); |
4ea21cd9 | 111 | return IRQ_HANDLED; |
1da177e4 LT |
112 | } |
113 | ||
114 | static int uml_net_open(struct net_device *dev) | |
115 | { | |
116 | struct uml_net_private *lp = dev->priv; | |
1da177e4 LT |
117 | int err; |
118 | ||
1da177e4 LT |
119 | if(lp->fd >= 0){ |
120 | err = -ENXIO; | |
121 | goto out; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | lp->fd = (*lp->open)(&lp->user); |
125 | if(lp->fd < 0){ | |
126 | err = lp->fd; | |
127 | goto out; | |
128 | } | |
129 | ||
130 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 131 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
1da177e4 LT |
132 | if(err != 0){ |
133 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); | |
1da177e4 | 134 | err = -ENETUNREACH; |
14d9ead0 | 135 | goto out_close; |
1da177e4 LT |
136 | } |
137 | ||
138 | lp->tl.data = (unsigned long) &lp->user; | |
139 | netif_start_queue(dev); | |
140 | ||
141 | /* clear buffer - it can happen that the host side of the interface | |
142 | * is full when we get here. In this case, new data is never queued, | |
143 | * SIGIOs never arrive, and the net never works. | |
144 | */ | |
145 | while((err = uml_net_rx(dev)) > 0) ; | |
146 | ||
14d9ead0 JD |
147 | spin_lock(&opened_lock); |
148 | list_add(&lp->list, &opened); | |
149 | spin_unlock(&opened_lock); | |
150 | ||
151 | return 0; | |
152 | out_close: | |
153 | if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); | |
154 | lp->fd = -1; | |
155 | out: | |
14d9ead0 | 156 | return err; |
1da177e4 LT |
157 | } |
158 | ||
159 | static int uml_net_close(struct net_device *dev) | |
160 | { | |
161 | struct uml_net_private *lp = dev->priv; | |
f28169d2 | 162 | |
1da177e4 | 163 | netif_stop_queue(dev); |
1da177e4 | 164 | |
1da177e4 LT |
165 | free_irq(dev->irq, dev); |
166 | if(lp->close != NULL) | |
167 | (*lp->close)(lp->fd, &lp->user); | |
168 | lp->fd = -1; | |
169 | ||
14d9ead0 JD |
170 | spin_lock(&opened_lock); |
171 | list_del(&lp->list); | |
172 | spin_unlock(&opened_lock); | |
173 | ||
1da177e4 LT |
174 | return 0; |
175 | } | |
176 | ||
177 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
178 | { | |
179 | struct uml_net_private *lp = dev->priv; | |
180 | unsigned long flags; | |
181 | int len; | |
182 | ||
183 | netif_stop_queue(dev); | |
184 | ||
185 | spin_lock_irqsave(&lp->lock, flags); | |
186 | ||
187 | len = (*lp->write)(lp->fd, &skb, lp); | |
188 | ||
189 | if(len == skb->len) { | |
190 | lp->stats.tx_packets++; | |
191 | lp->stats.tx_bytes += skb->len; | |
192 | dev->trans_start = jiffies; | |
193 | netif_start_queue(dev); | |
194 | ||
195 | /* this is normally done in the interrupt when tx finishes */ | |
196 | netif_wake_queue(dev); | |
f28169d2 | 197 | } |
1da177e4 LT |
198 | else if(len == 0){ |
199 | netif_start_queue(dev); | |
200 | lp->stats.tx_dropped++; | |
201 | } | |
202 | else { | |
203 | netif_start_queue(dev); | |
204 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
205 | } | |
206 | ||
207 | spin_unlock_irqrestore(&lp->lock, flags); | |
208 | ||
209 | dev_kfree_skb(skb); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) | |
215 | { | |
216 | struct uml_net_private *lp = dev->priv; | |
217 | return &lp->stats; | |
218 | } | |
219 | ||
220 | static void uml_net_set_multicast_list(struct net_device *dev) | |
221 | { | |
222 | if (dev->flags & IFF_PROMISC) return; | |
223 | else if (dev->mc_count) dev->flags |= IFF_ALLMULTI; | |
224 | else dev->flags &= ~IFF_ALLMULTI; | |
225 | } | |
226 | ||
227 | static void uml_net_tx_timeout(struct net_device *dev) | |
228 | { | |
229 | dev->trans_start = jiffies; | |
230 | netif_wake_queue(dev); | |
231 | } | |
232 | ||
233 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
234 | { | |
235 | struct uml_net_private *lp = dev->priv; | |
236 | struct sockaddr *hwaddr = addr; | |
237 | ||
48af05ed | 238 | spin_lock_irq(&lp->lock); |
bf61f50d | 239 | set_ether_mac(dev, hwaddr->sa_data); |
48af05ed | 240 | spin_unlock_irq(&lp->lock); |
1da177e4 | 241 | |
4ea21cd9 | 242 | return 0; |
1da177e4 LT |
243 | } |
244 | ||
245 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
246 | { | |
247 | struct uml_net_private *lp = dev->priv; | |
248 | int err = 0; | |
249 | ||
48af05ed | 250 | spin_lock_irq(&lp->lock); |
1da177e4 LT |
251 | |
252 | new_mtu = (*lp->set_mtu)(new_mtu, &lp->user); | |
253 | if(new_mtu < 0){ | |
254 | err = new_mtu; | |
255 | goto out; | |
256 | } | |
257 | ||
258 | dev->mtu = new_mtu; | |
259 | ||
260 | out: | |
48af05ed | 261 | spin_unlock_irq(&lp->lock); |
1da177e4 LT |
262 | return err; |
263 | } | |
264 | ||
6d387484 CH |
265 | static void uml_net_get_drvinfo(struct net_device *dev, |
266 | struct ethtool_drvinfo *info) | |
1da177e4 | 267 | { |
6d387484 CH |
268 | strcpy(info->driver, DRIVER_NAME); |
269 | strcpy(info->version, "42"); | |
1da177e4 LT |
270 | } |
271 | ||
6d387484 CH |
272 | static struct ethtool_ops uml_net_ethtool_ops = { |
273 | .get_drvinfo = uml_net_get_drvinfo, | |
274 | .get_link = ethtool_op_get_link, | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | void uml_net_user_timer_expire(unsigned long _conn) |
278 | { | |
279 | #ifdef undef | |
280 | struct connection *conn = (struct connection *)_conn; | |
281 | ||
282 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
283 | do_connect(conn); | |
284 | #endif | |
285 | } | |
286 | ||
b10aeeef JD |
287 | static void setup_etheraddr(char *str, unsigned char *addr) |
288 | { | |
289 | char *end; | |
290 | int i; | |
291 | ||
292 | if(str == NULL) | |
293 | goto random; | |
294 | ||
295 | for(i=0;i<6;i++){ | |
296 | addr[i] = simple_strtoul(str, &end, 16); | |
297 | if((end == str) || | |
298 | ((*end != ':') && (*end != ',') && (*end != '\0'))){ | |
299 | printk(KERN_ERR | |
300 | "setup_etheraddr: failed to parse '%s' " | |
301 | "as an ethernet address\n", str); | |
302 | goto random; | |
303 | } | |
304 | str = end + 1; | |
305 | } | |
306 | if(addr[0] & 1){ | |
307 | printk(KERN_ERR | |
308 | "Attempt to assign a broadcast ethernet address to a " | |
309 | "device disallowed\n"); | |
310 | goto random; | |
311 | } | |
312 | return; | |
313 | ||
314 | random: | |
d6c64102 | 315 | random_ether_addr(addr); |
b10aeeef JD |
316 | } |
317 | ||
1da177e4 | 318 | static DEFINE_SPINLOCK(devices_lock); |
9010772c | 319 | static LIST_HEAD(devices); |
1da177e4 | 320 | |
3ae5eaec RK |
321 | static struct platform_driver uml_net_driver = { |
322 | .driver = { | |
323 | .name = DRIVER_NAME, | |
324 | }, | |
1da177e4 LT |
325 | }; |
326 | static int driver_registered; | |
327 | ||
328 | static int eth_configure(int n, void *init, char *mac, | |
329 | struct transport *transport) | |
330 | { | |
331 | struct uml_net *device; | |
332 | struct net_device *dev; | |
333 | struct uml_net_private *lp; | |
334 | int save, err, size; | |
335 | ||
f28169d2 | 336 | size = transport->private_size + sizeof(struct uml_net_private) + |
1da177e4 LT |
337 | sizeof(((struct uml_net_private *) 0)->user); |
338 | ||
0268bd0a | 339 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
1da177e4 LT |
340 | if (device == NULL) { |
341 | printk(KERN_ERR "eth_configure failed to allocate uml_net\n"); | |
342 | return(1); | |
343 | } | |
344 | ||
1da177e4 LT |
345 | INIT_LIST_HEAD(&device->list); |
346 | device->index = n; | |
347 | ||
348 | spin_lock(&devices_lock); | |
349 | list_add(&device->list, &devices); | |
350 | spin_unlock(&devices_lock); | |
351 | ||
b10aeeef | 352 | setup_etheraddr(mac, device->mac); |
1da177e4 LT |
353 | |
354 | printk(KERN_INFO "Netdevice %d ", n); | |
b10aeeef JD |
355 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", |
356 | device->mac[0], device->mac[1], | |
357 | device->mac[2], device->mac[3], | |
358 | device->mac[4], device->mac[5]); | |
1da177e4 LT |
359 | printk(": "); |
360 | dev = alloc_etherdev(size); | |
361 | if (dev == NULL) { | |
362 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); | |
363 | return 1; | |
364 | } | |
365 | ||
e56a7885 PBG |
366 | lp = dev->priv; |
367 | /* This points to the transport private data. It's still clear, but we | |
368 | * must memset it to 0 *now*. Let's help the drivers. */ | |
369 | memset(lp, 0, size); | |
eff3b634 | 370 | INIT_WORK(&lp->work, uml_dev_close); |
e56a7885 | 371 | |
1da177e4 LT |
372 | /* sysfs register */ |
373 | if (!driver_registered) { | |
3ae5eaec | 374 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
375 | driver_registered = 1; |
376 | } | |
377 | device->pdev.id = n; | |
378 | device->pdev.name = DRIVER_NAME; | |
379 | platform_device_register(&device->pdev); | |
380 | SET_NETDEV_DEV(dev,&device->pdev.dev); | |
381 | ||
382 | /* If this name ends up conflicting with an existing registered | |
383 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
384 | * and fail. | |
385 | */ | |
386 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); | |
387 | device->dev = dev; | |
388 | ||
389 | (*transport->kern->init)(dev, init); | |
390 | ||
391 | dev->mtu = transport->user->max_packet; | |
392 | dev->open = uml_net_open; | |
393 | dev->hard_start_xmit = uml_net_start_xmit; | |
394 | dev->stop = uml_net_close; | |
395 | dev->get_stats = uml_net_get_stats; | |
396 | dev->set_multicast_list = uml_net_set_multicast_list; | |
397 | dev->tx_timeout = uml_net_tx_timeout; | |
398 | dev->set_mac_address = uml_net_set_mac; | |
399 | dev->change_mtu = uml_net_change_mtu; | |
6d387484 | 400 | dev->ethtool_ops = ¨_net_ethtool_ops; |
1da177e4 LT |
401 | dev->watchdog_timeo = (HZ >> 1); |
402 | dev->irq = UM_ETH_IRQ; | |
403 | ||
404 | rtnl_lock(); | |
405 | err = register_netdevice(dev); | |
406 | rtnl_unlock(); | |
407 | if (err) { | |
408 | device->dev = NULL; | |
409 | /* XXX: should we call ->remove() here? */ | |
410 | free_netdev(dev); | |
411 | return 1; | |
412 | } | |
1da177e4 LT |
413 | |
414 | /* lp.user is the first four bytes of the transport data, which | |
415 | * has already been initialized. This structure assignment will | |
416 | * overwrite that, so we make sure that .user gets overwritten with | |
417 | * what it already has. | |
418 | */ | |
419 | save = lp->user[0]; | |
420 | *lp = ((struct uml_net_private) | |
421 | { .list = LIST_HEAD_INIT(lp->list), | |
422 | .dev = dev, | |
423 | .fd = -1, | |
424 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
1da177e4 LT |
425 | .protocol = transport->kern->protocol, |
426 | .open = transport->user->open, | |
427 | .close = transport->user->close, | |
428 | .remove = transport->user->remove, | |
429 | .read = transport->kern->read, | |
430 | .write = transport->kern->write, | |
431 | .add_address = transport->user->add_address, | |
432 | .delete_address = transport->user->delete_address, | |
433 | .set_mtu = transport->user->set_mtu, | |
434 | .user = { save } }); | |
435 | ||
436 | init_timer(&lp->tl); | |
437 | spin_lock_init(&lp->lock); | |
438 | lp->tl.function = uml_net_user_timer_expire; | |
b10aeeef | 439 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); |
1da177e4 | 440 | |
f28169d2 | 441 | if (transport->user->init) |
1da177e4 LT |
442 | (*transport->user->init)(&lp->user, dev); |
443 | ||
b10aeeef | 444 | set_ether_mac(dev, device->mac); |
1da177e4 | 445 | |
14d9ead0 | 446 | return 0; |
1da177e4 LT |
447 | } |
448 | ||
449 | static struct uml_net *find_device(int n) | |
450 | { | |
451 | struct uml_net *device; | |
452 | struct list_head *ele; | |
453 | ||
454 | spin_lock(&devices_lock); | |
455 | list_for_each(ele, &devices){ | |
456 | device = list_entry(ele, struct uml_net, list); | |
457 | if(device->index == n) | |
458 | goto out; | |
459 | } | |
460 | device = NULL; | |
461 | out: | |
462 | spin_unlock(&devices_lock); | |
4ea21cd9 | 463 | return device; |
1da177e4 LT |
464 | } |
465 | ||
f28169d2 JD |
466 | static int eth_parse(char *str, int *index_out, char **str_out, |
467 | char **error_out) | |
1da177e4 LT |
468 | { |
469 | char *end; | |
f28169d2 | 470 | int n, err = -EINVAL;; |
1da177e4 LT |
471 | |
472 | n = simple_strtoul(str, &end, 0); | |
473 | if(end == str){ | |
f28169d2 JD |
474 | *error_out = "Bad device number"; |
475 | return err; | |
1da177e4 | 476 | } |
f28169d2 | 477 | |
1da177e4 LT |
478 | str = end; |
479 | if(*str != '='){ | |
f28169d2 JD |
480 | *error_out = "Expected '=' after device number"; |
481 | return err; | |
1da177e4 | 482 | } |
f28169d2 | 483 | |
1da177e4 LT |
484 | str++; |
485 | if(find_device(n)){ | |
f28169d2 JD |
486 | *error_out = "Device already configured"; |
487 | return err; | |
1da177e4 | 488 | } |
f28169d2 JD |
489 | |
490 | *index_out = n; | |
1da177e4 | 491 | *str_out = str; |
f28169d2 | 492 | return 0; |
1da177e4 LT |
493 | } |
494 | ||
495 | struct eth_init { | |
496 | struct list_head list; | |
497 | char *init; | |
498 | int index; | |
499 | }; | |
500 | ||
d3b7f69d JD |
501 | static DEFINE_SPINLOCK(transports_lock); |
502 | static LIST_HEAD(transports); | |
1da177e4 LT |
503 | |
504 | /* Filled in during early boot */ | |
505 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
506 | ||
507 | static int check_transport(struct transport *transport, char *eth, int n, | |
508 | void **init_out, char **mac_out) | |
509 | { | |
510 | int len; | |
511 | ||
512 | len = strlen(transport->name); | |
513 | if(strncmp(eth, transport->name, len)) | |
4ea21cd9 | 514 | return 0; |
1da177e4 LT |
515 | |
516 | eth += len; | |
517 | if(*eth == ',') | |
518 | eth++; | |
519 | else if(*eth != '\0') | |
4ea21cd9 | 520 | return 0; |
1da177e4 LT |
521 | |
522 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
523 | if(*init_out == NULL) | |
4ea21cd9 | 524 | return 1; |
1da177e4 LT |
525 | |
526 | if(!transport->setup(eth, mac_out, *init_out)){ | |
527 | kfree(*init_out); | |
528 | *init_out = NULL; | |
529 | } | |
4ea21cd9 | 530 | return 1; |
1da177e4 LT |
531 | } |
532 | ||
533 | void register_transport(struct transport *new) | |
534 | { | |
535 | struct list_head *ele, *next; | |
536 | struct eth_init *eth; | |
537 | void *init; | |
538 | char *mac = NULL; | |
539 | int match; | |
540 | ||
d3b7f69d JD |
541 | spin_lock(&transports_lock); |
542 | BUG_ON(!list_empty(&new->list)); | |
1da177e4 | 543 | list_add(&new->list, &transports); |
d3b7f69d | 544 | spin_unlock(&transports_lock); |
1da177e4 LT |
545 | |
546 | list_for_each_safe(ele, next, ð_cmd_line){ | |
547 | eth = list_entry(ele, struct eth_init, list); | |
548 | match = check_transport(new, eth->init, eth->index, &init, | |
549 | &mac); | |
550 | if(!match) | |
551 | continue; | |
552 | else if(init != NULL){ | |
553 | eth_configure(eth->index, init, mac, new); | |
554 | kfree(init); | |
555 | } | |
556 | list_del(ð->list); | |
557 | } | |
558 | } | |
559 | ||
560 | static int eth_setup_common(char *str, int index) | |
561 | { | |
562 | struct list_head *ele; | |
563 | struct transport *transport; | |
564 | void *init; | |
565 | char *mac = NULL; | |
566 | ||
567 | list_for_each(ele, &transports){ | |
568 | transport = list_entry(ele, struct transport, list); | |
569 | if(!check_transport(transport, str, index, &init, &mac)) | |
570 | continue; | |
571 | if(init != NULL){ | |
572 | eth_configure(index, init, mac, transport); | |
573 | kfree(init); | |
574 | } | |
4ea21cd9 | 575 | return 1; |
1da177e4 | 576 | } |
4ea21cd9 | 577 | return 0; |
1da177e4 LT |
578 | } |
579 | ||
580 | static int eth_setup(char *str) | |
581 | { | |
582 | struct eth_init *new; | |
f28169d2 | 583 | char *error; |
1da177e4 LT |
584 | int n, err; |
585 | ||
f28169d2 JD |
586 | err = eth_parse(str, &n, &str, &error); |
587 | if(err){ | |
588 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", | |
589 | str, error); | |
1183dc94 | 590 | return 1; |
f28169d2 | 591 | } |
1da177e4 | 592 | |
1183dc94 | 593 | new = alloc_bootmem(sizeof(*new)); |
1da177e4 LT |
594 | if (new == NULL){ |
595 | printk("eth_init : alloc_bootmem failed\n"); | |
1183dc94 | 596 | return 1; |
1da177e4 LT |
597 | } |
598 | ||
599 | INIT_LIST_HEAD(&new->list); | |
600 | new->index = n; | |
601 | new->init = str; | |
602 | ||
603 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 604 | return 1; |
1da177e4 LT |
605 | } |
606 | ||
607 | __setup("eth", eth_setup); | |
608 | __uml_help(eth_setup, | |
609 | "eth[0-9]+=<transport>,<options>\n" | |
610 | " Configure a network device.\n\n" | |
611 | ); | |
612 | ||
613 | #if 0 | |
614 | static int eth_init(void) | |
615 | { | |
616 | struct list_head *ele, *next; | |
617 | struct eth_init *eth; | |
618 | ||
619 | list_for_each_safe(ele, next, ð_cmd_line){ | |
620 | eth = list_entry(ele, struct eth_init, list); | |
621 | ||
622 | if(eth_setup_common(eth->init, eth->index)) | |
623 | list_del(ð->list); | |
624 | } | |
f28169d2 | 625 | |
1da177e4 LT |
626 | return(1); |
627 | } | |
628 | __initcall(eth_init); | |
629 | #endif | |
630 | ||
f28169d2 | 631 | static int net_config(char *str, char **error_out) |
1da177e4 LT |
632 | { |
633 | int n, err; | |
634 | ||
f28169d2 JD |
635 | err = eth_parse(str, &n, &str, error_out); |
636 | if(err) | |
637 | return err; | |
1da177e4 | 638 | |
f28169d2 JD |
639 | /* This string is broken up and the pieces used by the underlying |
640 | * driver. So, it is freed only if eth_setup_common fails. | |
641 | */ | |
970d6e3a | 642 | str = kstrdup(str, GFP_KERNEL); |
1da177e4 | 643 | if(str == NULL){ |
f28169d2 JD |
644 | *error_out = "net_config failed to strdup string"; |
645 | return -ENOMEM; | |
1da177e4 LT |
646 | } |
647 | err = !eth_setup_common(str, n); | |
f28169d2 | 648 | if(err) |
1da177e4 LT |
649 | kfree(str); |
650 | return(err); | |
651 | } | |
652 | ||
29d56cfe JD |
653 | static int net_id(char **str, int *start_out, int *end_out) |
654 | { | |
655 | char *end; | |
656 | int n; | |
657 | ||
658 | n = simple_strtoul(*str, &end, 0); | |
659 | if((*end != '\0') || (end == *str)) | |
660 | return -1; | |
661 | ||
662 | *start_out = n; | |
663 | *end_out = n; | |
664 | *str = end; | |
665 | return n; | |
666 | } | |
667 | ||
f28169d2 | 668 | static int net_remove(int n, char **error_out) |
1da177e4 LT |
669 | { |
670 | struct uml_net *device; | |
671 | struct net_device *dev; | |
672 | struct uml_net_private *lp; | |
1da177e4 LT |
673 | |
674 | device = find_device(n); | |
675 | if(device == NULL) | |
29d56cfe | 676 | return -ENODEV; |
1da177e4 LT |
677 | |
678 | dev = device->dev; | |
679 | lp = dev->priv; | |
29d56cfe | 680 | if(lp->fd > 0) |
4ea21cd9 | 681 | return -EBUSY; |
1da177e4 LT |
682 | if(lp->remove != NULL) (*lp->remove)(&lp->user); |
683 | unregister_netdev(dev); | |
684 | platform_device_unregister(&device->pdev); | |
685 | ||
686 | list_del(&device->list); | |
687 | kfree(device); | |
688 | free_netdev(dev); | |
29d56cfe | 689 | return 0; |
1da177e4 LT |
690 | } |
691 | ||
692 | static struct mc_device net_mc = { | |
84f48d4f | 693 | .list = LIST_HEAD_INIT(net_mc.list), |
1da177e4 LT |
694 | .name = "eth", |
695 | .config = net_config, | |
696 | .get_config = NULL, | |
4ea21cd9 | 697 | .id = net_id, |
1da177e4 LT |
698 | .remove = net_remove, |
699 | }; | |
700 | ||
701 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, | |
702 | void *ptr) | |
703 | { | |
704 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
705 | struct net_device *dev = ifa->ifa_dev->dev; |
706 | struct uml_net_private *lp; | |
707 | void (*proc)(unsigned char *, unsigned char *, void *); | |
708 | unsigned char addr_buf[4], netmask_buf[4]; | |
709 | ||
4ea21cd9 JD |
710 | if(dev->open != uml_net_open) |
711 | return NOTIFY_DONE; | |
1da177e4 LT |
712 | |
713 | lp = dev->priv; | |
714 | ||
715 | proc = NULL; | |
716 | switch (event){ | |
717 | case NETDEV_UP: | |
718 | proc = lp->add_address; | |
719 | break; | |
720 | case NETDEV_DOWN: | |
721 | proc = lp->delete_address; | |
722 | break; | |
723 | } | |
724 | if(proc != NULL){ | |
0e76422c BS |
725 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
726 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
727 | (*proc)(addr_buf, netmask_buf, &lp->user); |
728 | } | |
4ea21cd9 | 729 | return NOTIFY_DONE; |
1da177e4 LT |
730 | } |
731 | ||
732 | struct notifier_block uml_inetaddr_notifier = { | |
733 | .notifier_call = uml_inetaddr_event, | |
734 | }; | |
735 | ||
736 | static int uml_net_init(void) | |
737 | { | |
738 | struct list_head *ele; | |
f28169d2 | 739 | struct uml_net_private *lp; |
1da177e4 LT |
740 | struct in_device *ip; |
741 | struct in_ifaddr *in; | |
742 | ||
743 | mconsole_register_dev(&net_mc); | |
744 | register_inetaddr_notifier(¨_inetaddr_notifier); | |
745 | ||
746 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
747 | * didn't get a chance to run for them. This fakes it so that | |
748 | * addresses which have already been set up get handled properly. | |
749 | */ | |
750 | list_for_each(ele, &opened){ | |
751 | lp = list_entry(ele, struct uml_net_private, list); | |
752 | ip = lp->dev->ip_ptr; | |
753 | if(ip == NULL) continue; | |
754 | in = ip->ifa_list; | |
755 | while(in != NULL){ | |
756 | uml_inetaddr_event(NULL, NETDEV_UP, in); | |
757 | in = in->ifa_next; | |
758 | } | |
f28169d2 | 759 | } |
1da177e4 LT |
760 | |
761 | return(0); | |
762 | } | |
763 | ||
764 | __initcall(uml_net_init); | |
765 | ||
766 | static void close_devices(void) | |
767 | { | |
768 | struct list_head *ele; | |
769 | struct uml_net_private *lp; | |
770 | ||
771 | list_for_each(ele, &opened){ | |
772 | lp = list_entry(ele, struct uml_net_private, list); | |
8d93c700 | 773 | free_irq(lp->dev->irq, lp->dev); |
1da177e4 LT |
774 | if((lp->close != NULL) && (lp->fd >= 0)) |
775 | (*lp->close)(lp->fd, &lp->user); | |
776 | if(lp->remove != NULL) (*lp->remove)(&lp->user); | |
777 | } | |
778 | } | |
779 | ||
780 | __uml_exitcall(close_devices); | |
781 | ||
1da177e4 LT |
782 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
783 | { | |
784 | if((skb != NULL) && (skb_tailroom(skb) < extra)){ | |
785 | struct sk_buff *skb2; | |
786 | ||
787 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
788 | dev_kfree_skb(skb); | |
789 | skb = skb2; | |
790 | } | |
791 | if(skb != NULL) skb_put(skb, extra); | |
792 | return(skb); | |
793 | } | |
794 | ||
f28169d2 JD |
795 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
796 | void *), | |
1da177e4 LT |
797 | void *arg) |
798 | { | |
799 | struct net_device *dev = d; | |
800 | struct in_device *ip = dev->ip_ptr; | |
801 | struct in_ifaddr *in; | |
802 | unsigned char address[4], netmask[4]; | |
803 | ||
804 | if(ip == NULL) return; | |
805 | in = ip->ifa_list; | |
806 | while(in != NULL){ | |
0e76422c BS |
807 | memcpy(address, &in->ifa_address, sizeof(address)); |
808 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
809 | (*cb)(address, netmask, arg); |
810 | in = in->ifa_next; | |
811 | } | |
812 | } | |
813 | ||
814 | int dev_netmask(void *d, void *m) | |
815 | { | |
816 | struct net_device *dev = d; | |
817 | struct in_device *ip = dev->ip_ptr; | |
818 | struct in_ifaddr *in; | |
a144ea4b | 819 | __be32 *mask_out = m; |
1da177e4 | 820 | |
f28169d2 | 821 | if(ip == NULL) |
1da177e4 LT |
822 | return(1); |
823 | ||
824 | in = ip->ifa_list; | |
f28169d2 | 825 | if(in == NULL) |
1da177e4 LT |
826 | return(1); |
827 | ||
828 | *mask_out = in->ifa_mask; | |
829 | return(0); | |
830 | } | |
831 | ||
832 | void *get_output_buffer(int *len_out) | |
833 | { | |
834 | void *ret; | |
835 | ||
836 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
837 | if(ret) *len_out = PAGE_SIZE; | |
838 | else *len_out = 0; | |
4ea21cd9 | 839 | return ret; |
1da177e4 LT |
840 | } |
841 | ||
842 | void free_output_buffer(void *buffer) | |
843 | { | |
844 | free_pages((unsigned long) buffer, 0); | |
845 | } | |
846 | ||
f28169d2 | 847 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
1da177e4 LT |
848 | char **gate_addr) |
849 | { | |
850 | char *remain; | |
851 | ||
852 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
853 | if(remain != NULL){ | |
854 | printk("tap_setup_common - Extra garbage on specification : " | |
855 | "'%s'\n", remain); | |
856 | return(1); | |
857 | } | |
858 | ||
859 | return(0); | |
860 | } | |
861 | ||
862 | unsigned short eth_protocol(struct sk_buff *skb) | |
863 | { | |
864 | return(eth_type_trans(skb, skb->dev)); | |
865 | } |