Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
cd1ae0e4 | 2 | * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
f28169d2 | 3 | * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and |
1da177e4 LT |
4 | * James Leu (jleu@mindspring.net). |
5 | * Copyright (C) 2001 by various other people who didn't put their name here. | |
6 | * Licensed under the GPL. | |
7 | */ | |
8 | ||
cd1ae0e4 JD |
9 | #include <linux/bootmem.h> |
10 | #include <linux/etherdevice.h> | |
11 | #include <linux/ethtool.h> | |
12 | #include <linux/inetdevice.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <linux/skbuff.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
cd1ae0e4 | 20 | #include <linux/spinlock.h> |
1da177e4 | 21 | #include "init.h" |
1da177e4 | 22 | #include "irq_kern.h" |
cd1ae0e4 JD |
23 | #include "irq_user.h" |
24 | #include "mconsole_kern.h" | |
25 | #include "net_kern.h" | |
26 | #include "net_user.h" | |
1da177e4 LT |
27 | |
28 | #define DRIVER_NAME "uml-netdev" | |
29 | ||
30 | static DEFINE_SPINLOCK(opened_lock); | |
9010772c | 31 | static LIST_HEAD(opened); |
1da177e4 | 32 | |
605c1e57 JD |
33 | /* |
34 | * The drop_skb is used when we can't allocate an skb. The | |
35 | * packet is read into drop_skb in order to get the data off the | |
36 | * connection to the host. | |
37 | * It is reallocated whenever a maximum packet size is seen which is | |
38 | * larger than any seen before. update_drop_skb is called from | |
39 | * eth_configure when a new interface is added. | |
40 | */ | |
41 | static DEFINE_SPINLOCK(drop_lock); | |
42 | static struct sk_buff *drop_skb; | |
43 | static int drop_max; | |
44 | ||
45 | static int update_drop_skb(int max) | |
46 | { | |
47 | struct sk_buff *new; | |
48 | unsigned long flags; | |
49 | int err = 0; | |
50 | ||
51 | spin_lock_irqsave(&drop_lock, flags); | |
52 | ||
53 | if (max <= drop_max) | |
54 | goto out; | |
55 | ||
56 | err = -ENOMEM; | |
57 | new = dev_alloc_skb(max); | |
58 | if (new == NULL) | |
59 | goto out; | |
60 | ||
61 | skb_put(new, max); | |
62 | ||
63 | kfree_skb(drop_skb); | |
64 | drop_skb = new; | |
65 | drop_max = max; | |
66 | err = 0; | |
67 | out: | |
68 | spin_unlock_irqrestore(&drop_lock, flags); | |
69 | ||
70 | return err; | |
71 | } | |
72 | ||
1da177e4 LT |
73 | static int uml_net_rx(struct net_device *dev) |
74 | { | |
17c324fa | 75 | struct uml_net_private *lp = netdev_priv(dev); |
1da177e4 LT |
76 | int pkt_len; |
77 | struct sk_buff *skb; | |
78 | ||
79 | /* If we can't allocate memory, try again next round. */ | |
b53f35a8 | 80 | skb = dev_alloc_skb(lp->max_packet); |
1da177e4 | 81 | if (skb == NULL) { |
605c1e57 JD |
82 | drop_skb->dev = dev; |
83 | /* Read a packet into drop_skb and don't do anything with it. */ | |
84 | (*lp->read)(lp->fd, drop_skb, lp); | |
cfa8707a | 85 | dev->stats.rx_dropped++; |
1da177e4 LT |
86 | return 0; |
87 | } | |
88 | ||
89 | skb->dev = dev; | |
b53f35a8 | 90 | skb_put(skb, lp->max_packet); |
459a98ed | 91 | skb_reset_mac_header(skb); |
b53f35a8 | 92 | pkt_len = (*lp->read)(lp->fd, skb, lp); |
1da177e4 LT |
93 | |
94 | if (pkt_len > 0) { | |
95 | skb_trim(skb, pkt_len); | |
96 | skb->protocol = (*lp->protocol)(skb); | |
1da177e4 | 97 | |
cfa8707a SH |
98 | dev->stats.rx_bytes += skb->len; |
99 | dev->stats.rx_packets++; | |
505a41d4 | 100 | netif_rx(skb); |
1da177e4 LT |
101 | return pkt_len; |
102 | } | |
103 | ||
104 | kfree_skb(skb); | |
105 | return pkt_len; | |
106 | } | |
107 | ||
eff3b634 | 108 | static void uml_dev_close(struct work_struct *work) |
71c8d4c3 | 109 | { |
eff3b634 PZ |
110 | struct uml_net_private *lp = |
111 | container_of(work, struct uml_net_private, work); | |
112 | dev_close(lp->dev); | |
71c8d4c3 PBG |
113 | } |
114 | ||
074a0db8 | 115 | static irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
1da177e4 LT |
116 | { |
117 | struct net_device *dev = dev_id; | |
17c324fa | 118 | struct uml_net_private *lp = netdev_priv(dev); |
1da177e4 LT |
119 | int err; |
120 | ||
cd1ae0e4 JD |
121 | if (!netif_running(dev)) |
122 | return IRQ_NONE; | |
1da177e4 LT |
123 | |
124 | spin_lock(&lp->lock); | |
cd1ae0e4 JD |
125 | while ((err = uml_net_rx(dev)) > 0) ; |
126 | if (err < 0) { | |
f28169d2 JD |
127 | printk(KERN_ERR |
128 | "Device '%s' read returned %d, shutting it down\n", | |
1da177e4 | 129 | dev->name, err); |
71c8d4c3 PBG |
130 | /* dev_close can't be called in interrupt context, and takes |
131 | * again lp->lock. | |
132 | * And dev_close() can be safely called multiple times on the | |
133 | * same device, since it tests for (dev->flags & IFF_UP). So | |
eff3b634 PZ |
134 | * there's no harm in delaying the device shutdown. |
135 | * Furthermore, the workqueue will not re-enqueue an already | |
136 | * enqueued work item. */ | |
137 | schedule_work(&lp->work); | |
1da177e4 LT |
138 | goto out; |
139 | } | |
140 | reactivate_fd(lp->fd, UM_ETH_IRQ); | |
141 | ||
71c8d4c3 | 142 | out: |
1da177e4 | 143 | spin_unlock(&lp->lock); |
4ea21cd9 | 144 | return IRQ_HANDLED; |
1da177e4 LT |
145 | } |
146 | ||
147 | static int uml_net_open(struct net_device *dev) | |
148 | { | |
17c324fa | 149 | struct uml_net_private *lp = netdev_priv(dev); |
1da177e4 LT |
150 | int err; |
151 | ||
cd1ae0e4 | 152 | if (lp->fd >= 0) { |
1da177e4 LT |
153 | err = -ENXIO; |
154 | goto out; | |
155 | } | |
156 | ||
1da177e4 | 157 | lp->fd = (*lp->open)(&lp->user); |
cd1ae0e4 | 158 | if (lp->fd < 0) { |
1da177e4 LT |
159 | err = lp->fd; |
160 | goto out; | |
161 | } | |
162 | ||
163 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, | |
bd6aa650 | 164 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
cd1ae0e4 | 165 | if (err != 0) { |
1da177e4 | 166 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); |
1da177e4 | 167 | err = -ENETUNREACH; |
14d9ead0 | 168 | goto out_close; |
1da177e4 LT |
169 | } |
170 | ||
171 | lp->tl.data = (unsigned long) &lp->user; | |
172 | netif_start_queue(dev); | |
173 | ||
174 | /* clear buffer - it can happen that the host side of the interface | |
175 | * is full when we get here. In this case, new data is never queued, | |
176 | * SIGIOs never arrive, and the net never works. | |
177 | */ | |
cd1ae0e4 | 178 | while ((err = uml_net_rx(dev)) > 0) ; |
1da177e4 | 179 | |
14d9ead0 JD |
180 | spin_lock(&opened_lock); |
181 | list_add(&lp->list, &opened); | |
182 | spin_unlock(&opened_lock); | |
183 | ||
184 | return 0; | |
185 | out_close: | |
cd1ae0e4 | 186 | if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user); |
14d9ead0 JD |
187 | lp->fd = -1; |
188 | out: | |
14d9ead0 | 189 | return err; |
1da177e4 LT |
190 | } |
191 | ||
192 | static int uml_net_close(struct net_device *dev) | |
193 | { | |
17c324fa | 194 | struct uml_net_private *lp = netdev_priv(dev); |
f28169d2 | 195 | |
1da177e4 | 196 | netif_stop_queue(dev); |
1da177e4 | 197 | |
1da177e4 | 198 | free_irq(dev->irq, dev); |
cd1ae0e4 | 199 | if (lp->close != NULL) |
1da177e4 LT |
200 | (*lp->close)(lp->fd, &lp->user); |
201 | lp->fd = -1; | |
202 | ||
14d9ead0 JD |
203 | spin_lock(&opened_lock); |
204 | list_del(&lp->list); | |
205 | spin_unlock(&opened_lock); | |
206 | ||
1da177e4 LT |
207 | return 0; |
208 | } | |
209 | ||
210 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
211 | { | |
17c324fa | 212 | struct uml_net_private *lp = netdev_priv(dev); |
1da177e4 LT |
213 | unsigned long flags; |
214 | int len; | |
215 | ||
216 | netif_stop_queue(dev); | |
217 | ||
218 | spin_lock_irqsave(&lp->lock, flags); | |
219 | ||
b53f35a8 | 220 | len = (*lp->write)(lp->fd, skb, lp); |
1da177e4 | 221 | |
cd1ae0e4 | 222 | if (len == skb->len) { |
cfa8707a SH |
223 | dev->stats.tx_packets++; |
224 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
225 | dev->trans_start = jiffies; |
226 | netif_start_queue(dev); | |
227 | ||
228 | /* this is normally done in the interrupt when tx finishes */ | |
229 | netif_wake_queue(dev); | |
f28169d2 | 230 | } |
cd1ae0e4 | 231 | else if (len == 0) { |
1da177e4 | 232 | netif_start_queue(dev); |
cfa8707a | 233 | dev->stats.tx_dropped++; |
1da177e4 LT |
234 | } |
235 | else { | |
236 | netif_start_queue(dev); | |
237 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
238 | } | |
239 | ||
240 | spin_unlock_irqrestore(&lp->lock, flags); | |
241 | ||
242 | dev_kfree_skb(skb); | |
243 | ||
6ed10654 | 244 | return NETDEV_TX_OK; |
1da177e4 LT |
245 | } |
246 | ||
1da177e4 LT |
247 | static void uml_net_set_multicast_list(struct net_device *dev) |
248 | { | |
f70c1766 | 249 | return; |
1da177e4 LT |
250 | } |
251 | ||
252 | static void uml_net_tx_timeout(struct net_device *dev) | |
253 | { | |
254 | dev->trans_start = jiffies; | |
255 | netif_wake_queue(dev); | |
256 | } | |
257 | ||
258 | static int uml_net_set_mac(struct net_device *dev, void *addr) | |
259 | { | |
17c324fa | 260 | struct uml_net_private *lp = netdev_priv(dev); |
1da177e4 LT |
261 | struct sockaddr *hwaddr = addr; |
262 | ||
48af05ed | 263 | spin_lock_irq(&lp->lock); |
f25c80a4 | 264 | eth_mac_addr(dev, hwaddr->sa_data); |
48af05ed | 265 | spin_unlock_irq(&lp->lock); |
1da177e4 | 266 | |
4ea21cd9 | 267 | return 0; |
1da177e4 LT |
268 | } |
269 | ||
270 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) | |
271 | { | |
1da177e4 LT |
272 | dev->mtu = new_mtu; |
273 | ||
b53f35a8 | 274 | return 0; |
1da177e4 LT |
275 | } |
276 | ||
6d387484 CH |
277 | static void uml_net_get_drvinfo(struct net_device *dev, |
278 | struct ethtool_drvinfo *info) | |
1da177e4 | 279 | { |
6d387484 CH |
280 | strcpy(info->driver, DRIVER_NAME); |
281 | strcpy(info->version, "42"); | |
1da177e4 LT |
282 | } |
283 | ||
0fc0b732 | 284 | static const struct ethtool_ops uml_net_ethtool_ops = { |
6d387484 CH |
285 | .get_drvinfo = uml_net_get_drvinfo, |
286 | .get_link = ethtool_op_get_link, | |
287 | }; | |
288 | ||
074a0db8 | 289 | static void uml_net_user_timer_expire(unsigned long _conn) |
1da177e4 LT |
290 | { |
291 | #ifdef undef | |
292 | struct connection *conn = (struct connection *)_conn; | |
293 | ||
294 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
295 | do_connect(conn); | |
296 | #endif | |
297 | } | |
298 | ||
e024715f | 299 | static void setup_etheraddr(char *str, unsigned char *addr, char *name) |
b10aeeef JD |
300 | { |
301 | char *end; | |
302 | int i; | |
303 | ||
cd1ae0e4 | 304 | if (str == NULL) |
b10aeeef JD |
305 | goto random; |
306 | ||
2278c5ac | 307 | for (i = 0; i < 6; i++) { |
b10aeeef | 308 | addr[i] = simple_strtoul(str, &end, 16); |
cd1ae0e4 JD |
309 | if ((end == str) || |
310 | ((*end != ':') && (*end != ',') && (*end != '\0'))) { | |
b10aeeef JD |
311 | printk(KERN_ERR |
312 | "setup_etheraddr: failed to parse '%s' " | |
313 | "as an ethernet address\n", str); | |
314 | goto random; | |
315 | } | |
316 | str = end + 1; | |
317 | } | |
e024715f | 318 | if (is_multicast_ether_addr(addr)) { |
b10aeeef | 319 | printk(KERN_ERR |
e024715f | 320 | "Attempt to assign a multicast ethernet address to a " |
b10aeeef JD |
321 | "device disallowed\n"); |
322 | goto random; | |
323 | } | |
e024715f PBG |
324 | if (!is_valid_ether_addr(addr)) { |
325 | printk(KERN_ERR | |
326 | "Attempt to assign an invalid ethernet address to a " | |
327 | "device disallowed\n"); | |
328 | goto random; | |
329 | } | |
330 | if (!is_local_ether_addr(addr)) { | |
331 | printk(KERN_WARNING | |
2278c5ac | 332 | "Warning: Assigning a globally valid ethernet " |
7d98230a | 333 | "address to a device\n"); |
2278c5ac JD |
334 | printk(KERN_WARNING "You should set the 2nd rightmost bit in " |
335 | "the first byte of the MAC,\n"); | |
7d98230a JD |
336 | printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n", |
337 | addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4], | |
338 | addr[5]); | |
e024715f | 339 | } |
b10aeeef JD |
340 | return; |
341 | ||
342 | random: | |
e024715f PBG |
343 | printk(KERN_INFO |
344 | "Choosing a random ethernet address for device %s\n", name); | |
d6c64102 | 345 | random_ether_addr(addr); |
b10aeeef JD |
346 | } |
347 | ||
1da177e4 | 348 | static DEFINE_SPINLOCK(devices_lock); |
9010772c | 349 | static LIST_HEAD(devices); |
1da177e4 | 350 | |
3ae5eaec RK |
351 | static struct platform_driver uml_net_driver = { |
352 | .driver = { | |
353 | .name = DRIVER_NAME, | |
354 | }, | |
1da177e4 | 355 | }; |
1da177e4 | 356 | |
2e3f5251 JD |
357 | static void net_device_release(struct device *dev) |
358 | { | |
8691b97b | 359 | struct uml_net *device = dev_get_drvdata(dev); |
2e3f5251 | 360 | struct net_device *netdev = device->dev; |
17c324fa | 361 | struct uml_net_private *lp = netdev_priv(netdev); |
2e3f5251 | 362 | |
cd1ae0e4 | 363 | if (lp->remove != NULL) |
2e3f5251 JD |
364 | (*lp->remove)(&lp->user); |
365 | list_del(&device->list); | |
366 | kfree(device); | |
367 | free_netdev(netdev); | |
368 | } | |
369 | ||
8bb95b39 SH |
370 | static const struct net_device_ops uml_netdev_ops = { |
371 | .ndo_open = uml_net_open, | |
372 | .ndo_stop = uml_net_close, | |
373 | .ndo_start_xmit = uml_net_start_xmit, | |
374 | .ndo_set_multicast_list = uml_net_set_multicast_list, | |
375 | .ndo_tx_timeout = uml_net_tx_timeout, | |
376 | .ndo_set_mac_address = uml_net_set_mac, | |
377 | .ndo_change_mtu = uml_net_change_mtu, | |
8bb95b39 SH |
378 | .ndo_validate_addr = eth_validate_addr, |
379 | }; | |
380 | ||
80e39311 JD |
381 | /* |
382 | * Ensures that platform_driver_register is called only once by | |
383 | * eth_configure. Will be set in an initcall. | |
384 | */ | |
385 | static int driver_registered; | |
386 | ||
f34d9d2d JD |
387 | static void eth_configure(int n, void *init, char *mac, |
388 | struct transport *transport) | |
1da177e4 LT |
389 | { |
390 | struct uml_net *device; | |
391 | struct net_device *dev; | |
392 | struct uml_net_private *lp; | |
c74c69b4 | 393 | int err, size; |
1da177e4 | 394 | |
c74c69b4 | 395 | size = transport->private_size + sizeof(struct uml_net_private); |
1da177e4 | 396 | |
0268bd0a | 397 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
1da177e4 | 398 | if (device == NULL) { |
8c840835 PBG |
399 | printk(KERN_ERR "eth_configure failed to allocate struct " |
400 | "uml_net\n"); | |
f34d9d2d | 401 | return; |
1da177e4 LT |
402 | } |
403 | ||
8c840835 PBG |
404 | dev = alloc_etherdev(size); |
405 | if (dev == NULL) { | |
406 | printk(KERN_ERR "eth_configure: failed to allocate struct " | |
407 | "net_device for eth%d\n", n); | |
408 | goto out_free_device; | |
409 | } | |
410 | ||
1da177e4 LT |
411 | INIT_LIST_HEAD(&device->list); |
412 | device->index = n; | |
413 | ||
e024715f PBG |
414 | /* If this name ends up conflicting with an existing registered |
415 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
416 | * and fail. | |
417 | */ | |
8c840835 | 418 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
e024715f | 419 | |
8c840835 | 420 | setup_etheraddr(mac, device->mac, dev->name); |
1da177e4 | 421 | |
7c510e4b | 422 | printk(KERN_INFO "Netdevice %d (%pM) : ", n, device->mac); |
1da177e4 | 423 | |
17c324fa | 424 | lp = netdev_priv(dev); |
e56a7885 PBG |
425 | /* This points to the transport private data. It's still clear, but we |
426 | * must memset it to 0 *now*. Let's help the drivers. */ | |
427 | memset(lp, 0, size); | |
eff3b634 | 428 | INIT_WORK(&lp->work, uml_dev_close); |
e56a7885 | 429 | |
1da177e4 LT |
430 | /* sysfs register */ |
431 | if (!driver_registered) { | |
3ae5eaec | 432 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
433 | driver_registered = 1; |
434 | } | |
435 | device->pdev.id = n; | |
436 | device->pdev.name = DRIVER_NAME; | |
2e3f5251 | 437 | device->pdev.dev.release = net_device_release; |
8691b97b | 438 | dev_set_drvdata(&device->pdev.dev, device); |
cd1ae0e4 | 439 | if (platform_device_register(&device->pdev)) |
f34d9d2d | 440 | goto out_free_netdev; |
1da177e4 LT |
441 | SET_NETDEV_DEV(dev,&device->pdev.dev); |
442 | ||
1da177e4 LT |
443 | device->dev = dev; |
444 | ||
f34d9d2d JD |
445 | /* |
446 | * These just fill in a data structure, so there's no failure | |
447 | * to be worried about. | |
448 | */ | |
1da177e4 LT |
449 | (*transport->kern->init)(dev, init); |
450 | ||
1da177e4 LT |
451 | *lp = ((struct uml_net_private) |
452 | { .list = LIST_HEAD_INIT(lp->list), | |
453 | .dev = dev, | |
454 | .fd = -1, | |
455 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
b53f35a8 | 456 | .max_packet = transport->user->max_packet, |
1da177e4 LT |
457 | .protocol = transport->kern->protocol, |
458 | .open = transport->user->open, | |
459 | .close = transport->user->close, | |
460 | .remove = transport->user->remove, | |
461 | .read = transport->kern->read, | |
462 | .write = transport->kern->write, | |
463 | .add_address = transport->user->add_address, | |
b53f35a8 | 464 | .delete_address = transport->user->delete_address }); |
1da177e4 LT |
465 | |
466 | init_timer(&lp->tl); | |
467 | spin_lock_init(&lp->lock); | |
468 | lp->tl.function = uml_net_user_timer_expire; | |
b10aeeef | 469 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); |
1da177e4 | 470 | |
f34d9d2d JD |
471 | if ((transport->user->init != NULL) && |
472 | ((*transport->user->init)(&lp->user, dev) != 0)) | |
473 | goto out_unregister; | |
1da177e4 | 474 | |
f25c80a4 | 475 | eth_mac_addr(dev, device->mac); |
b53f35a8 | 476 | dev->mtu = transport->user->mtu; |
8bb95b39 | 477 | dev->netdev_ops = ¨_netdev_ops; |
f34d9d2d JD |
478 | dev->ethtool_ops = ¨_net_ethtool_ops; |
479 | dev->watchdog_timeo = (HZ >> 1); | |
480 | dev->irq = UM_ETH_IRQ; | |
1da177e4 | 481 | |
605c1e57 JD |
482 | err = update_drop_skb(lp->max_packet); |
483 | if (err) | |
484 | goto out_undo_user_init; | |
485 | ||
f34d9d2d JD |
486 | rtnl_lock(); |
487 | err = register_netdevice(dev); | |
488 | rtnl_unlock(); | |
489 | if (err) | |
490 | goto out_undo_user_init; | |
491 | ||
492 | spin_lock(&devices_lock); | |
493 | list_add(&device->list, &devices); | |
494 | spin_unlock(&devices_lock); | |
495 | ||
496 | return; | |
497 | ||
498 | out_undo_user_init: | |
8c840835 | 499 | if (transport->user->remove != NULL) |
f34d9d2d JD |
500 | (*transport->user->remove)(&lp->user); |
501 | out_unregister: | |
502 | platform_device_unregister(&device->pdev); | |
7d98230a | 503 | return; /* platform_device_unregister frees dev and device */ |
f34d9d2d JD |
504 | out_free_netdev: |
505 | free_netdev(dev); | |
8c840835 | 506 | out_free_device: |
f34d9d2d | 507 | kfree(device); |
1da177e4 LT |
508 | } |
509 | ||
510 | static struct uml_net *find_device(int n) | |
511 | { | |
512 | struct uml_net *device; | |
513 | struct list_head *ele; | |
514 | ||
515 | spin_lock(&devices_lock); | |
cd1ae0e4 | 516 | list_for_each(ele, &devices) { |
1da177e4 | 517 | device = list_entry(ele, struct uml_net, list); |
cd1ae0e4 | 518 | if (device->index == n) |
1da177e4 LT |
519 | goto out; |
520 | } | |
521 | device = NULL; | |
522 | out: | |
523 | spin_unlock(&devices_lock); | |
4ea21cd9 | 524 | return device; |
1da177e4 LT |
525 | } |
526 | ||
f28169d2 JD |
527 | static int eth_parse(char *str, int *index_out, char **str_out, |
528 | char **error_out) | |
1da177e4 LT |
529 | { |
530 | char *end; | |
a419aef8 | 531 | int n, err = -EINVAL; |
1da177e4 LT |
532 | |
533 | n = simple_strtoul(str, &end, 0); | |
cd1ae0e4 | 534 | if (end == str) { |
f28169d2 JD |
535 | *error_out = "Bad device number"; |
536 | return err; | |
1da177e4 | 537 | } |
f28169d2 | 538 | |
1da177e4 | 539 | str = end; |
cd1ae0e4 | 540 | if (*str != '=') { |
f28169d2 JD |
541 | *error_out = "Expected '=' after device number"; |
542 | return err; | |
1da177e4 | 543 | } |
f28169d2 | 544 | |
1da177e4 | 545 | str++; |
cd1ae0e4 | 546 | if (find_device(n)) { |
f28169d2 JD |
547 | *error_out = "Device already configured"; |
548 | return err; | |
1da177e4 | 549 | } |
f28169d2 JD |
550 | |
551 | *index_out = n; | |
1da177e4 | 552 | *str_out = str; |
f28169d2 | 553 | return 0; |
1da177e4 LT |
554 | } |
555 | ||
556 | struct eth_init { | |
557 | struct list_head list; | |
558 | char *init; | |
559 | int index; | |
560 | }; | |
561 | ||
d3b7f69d JD |
562 | static DEFINE_SPINLOCK(transports_lock); |
563 | static LIST_HEAD(transports); | |
1da177e4 LT |
564 | |
565 | /* Filled in during early boot */ | |
c862fc32 | 566 | static LIST_HEAD(eth_cmd_line); |
1da177e4 LT |
567 | |
568 | static int check_transport(struct transport *transport, char *eth, int n, | |
569 | void **init_out, char **mac_out) | |
570 | { | |
571 | int len; | |
572 | ||
573 | len = strlen(transport->name); | |
cd1ae0e4 | 574 | if (strncmp(eth, transport->name, len)) |
4ea21cd9 | 575 | return 0; |
1da177e4 LT |
576 | |
577 | eth += len; | |
cd1ae0e4 | 578 | if (*eth == ',') |
1da177e4 | 579 | eth++; |
cd1ae0e4 | 580 | else if (*eth != '\0') |
4ea21cd9 | 581 | return 0; |
1da177e4 LT |
582 | |
583 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
cd1ae0e4 | 584 | if (*init_out == NULL) |
4ea21cd9 | 585 | return 1; |
1da177e4 | 586 | |
cd1ae0e4 | 587 | if (!transport->setup(eth, mac_out, *init_out)) { |
1da177e4 LT |
588 | kfree(*init_out); |
589 | *init_out = NULL; | |
590 | } | |
4ea21cd9 | 591 | return 1; |
1da177e4 LT |
592 | } |
593 | ||
594 | void register_transport(struct transport *new) | |
595 | { | |
596 | struct list_head *ele, *next; | |
597 | struct eth_init *eth; | |
598 | void *init; | |
599 | char *mac = NULL; | |
600 | int match; | |
601 | ||
d3b7f69d JD |
602 | spin_lock(&transports_lock); |
603 | BUG_ON(!list_empty(&new->list)); | |
1da177e4 | 604 | list_add(&new->list, &transports); |
d3b7f69d | 605 | spin_unlock(&transports_lock); |
1da177e4 | 606 | |
cd1ae0e4 | 607 | list_for_each_safe(ele, next, ð_cmd_line) { |
1da177e4 LT |
608 | eth = list_entry(ele, struct eth_init, list); |
609 | match = check_transport(new, eth->init, eth->index, &init, | |
610 | &mac); | |
cd1ae0e4 | 611 | if (!match) |
1da177e4 | 612 | continue; |
cd1ae0e4 | 613 | else if (init != NULL) { |
1da177e4 LT |
614 | eth_configure(eth->index, init, mac, new); |
615 | kfree(init); | |
616 | } | |
617 | list_del(ð->list); | |
618 | } | |
619 | } | |
620 | ||
621 | static int eth_setup_common(char *str, int index) | |
622 | { | |
623 | struct list_head *ele; | |
624 | struct transport *transport; | |
625 | void *init; | |
626 | char *mac = NULL; | |
c862fc32 | 627 | int found = 0; |
1da177e4 | 628 | |
c862fc32 | 629 | spin_lock(&transports_lock); |
cd1ae0e4 | 630 | list_for_each(ele, &transports) { |
1da177e4 | 631 | transport = list_entry(ele, struct transport, list); |
cd1ae0e4 | 632 | if (!check_transport(transport, str, index, &init, &mac)) |
1da177e4 | 633 | continue; |
cd1ae0e4 | 634 | if (init != NULL) { |
1da177e4 LT |
635 | eth_configure(index, init, mac, transport); |
636 | kfree(init); | |
637 | } | |
c862fc32 JD |
638 | found = 1; |
639 | break; | |
1da177e4 | 640 | } |
c862fc32 JD |
641 | |
642 | spin_unlock(&transports_lock); | |
643 | return found; | |
1da177e4 LT |
644 | } |
645 | ||
97a1fcbb | 646 | static int __init eth_setup(char *str) |
1da177e4 LT |
647 | { |
648 | struct eth_init *new; | |
f28169d2 | 649 | char *error; |
1da177e4 LT |
650 | int n, err; |
651 | ||
f28169d2 | 652 | err = eth_parse(str, &n, &str, &error); |
cd1ae0e4 | 653 | if (err) { |
f28169d2 JD |
654 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", |
655 | str, error); | |
1183dc94 | 656 | return 1; |
f28169d2 | 657 | } |
1da177e4 | 658 | |
1183dc94 | 659 | new = alloc_bootmem(sizeof(*new)); |
cd1ae0e4 JD |
660 | if (new == NULL) { |
661 | printk(KERN_ERR "eth_init : alloc_bootmem failed\n"); | |
1183dc94 | 662 | return 1; |
1da177e4 LT |
663 | } |
664 | ||
665 | INIT_LIST_HEAD(&new->list); | |
666 | new->index = n; | |
667 | new->init = str; | |
668 | ||
669 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 670 | return 1; |
1da177e4 LT |
671 | } |
672 | ||
673 | __setup("eth", eth_setup); | |
674 | __uml_help(eth_setup, | |
675 | "eth[0-9]+=<transport>,<options>\n" | |
676 | " Configure a network device.\n\n" | |
677 | ); | |
678 | ||
f28169d2 | 679 | static int net_config(char *str, char **error_out) |
1da177e4 LT |
680 | { |
681 | int n, err; | |
682 | ||
f28169d2 | 683 | err = eth_parse(str, &n, &str, error_out); |
cd1ae0e4 | 684 | if (err) |
f28169d2 | 685 | return err; |
1da177e4 | 686 | |
f28169d2 JD |
687 | /* This string is broken up and the pieces used by the underlying |
688 | * driver. So, it is freed only if eth_setup_common fails. | |
689 | */ | |
970d6e3a | 690 | str = kstrdup(str, GFP_KERNEL); |
cd1ae0e4 | 691 | if (str == NULL) { |
f28169d2 JD |
692 | *error_out = "net_config failed to strdup string"; |
693 | return -ENOMEM; | |
1da177e4 LT |
694 | } |
695 | err = !eth_setup_common(str, n); | |
cd1ae0e4 | 696 | if (err) |
1da177e4 | 697 | kfree(str); |
cd1ae0e4 | 698 | return err; |
1da177e4 LT |
699 | } |
700 | ||
29d56cfe JD |
701 | static int net_id(char **str, int *start_out, int *end_out) |
702 | { | |
cd1ae0e4 JD |
703 | char *end; |
704 | int n; | |
29d56cfe JD |
705 | |
706 | n = simple_strtoul(*str, &end, 0); | |
cd1ae0e4 | 707 | if ((*end != '\0') || (end == *str)) |
29d56cfe JD |
708 | return -1; |
709 | ||
cd1ae0e4 JD |
710 | *start_out = n; |
711 | *end_out = n; | |
712 | *str = end; | |
713 | return n; | |
29d56cfe JD |
714 | } |
715 | ||
f28169d2 | 716 | static int net_remove(int n, char **error_out) |
1da177e4 LT |
717 | { |
718 | struct uml_net *device; | |
719 | struct net_device *dev; | |
720 | struct uml_net_private *lp; | |
1da177e4 LT |
721 | |
722 | device = find_device(n); | |
cd1ae0e4 | 723 | if (device == NULL) |
29d56cfe | 724 | return -ENODEV; |
1da177e4 LT |
725 | |
726 | dev = device->dev; | |
17c324fa | 727 | lp = netdev_priv(dev); |
cd1ae0e4 | 728 | if (lp->fd > 0) |
4ea21cd9 | 729 | return -EBUSY; |
1da177e4 LT |
730 | unregister_netdev(dev); |
731 | platform_device_unregister(&device->pdev); | |
732 | ||
29d56cfe | 733 | return 0; |
1da177e4 LT |
734 | } |
735 | ||
736 | static struct mc_device net_mc = { | |
84f48d4f | 737 | .list = LIST_HEAD_INIT(net_mc.list), |
1da177e4 LT |
738 | .name = "eth", |
739 | .config = net_config, | |
740 | .get_config = NULL, | |
4ea21cd9 | 741 | .id = net_id, |
1da177e4 LT |
742 | .remove = net_remove, |
743 | }; | |
744 | ||
32f862c3 | 745 | #ifdef CONFIG_INET |
1da177e4 LT |
746 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, |
747 | void *ptr) | |
748 | { | |
749 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
750 | struct net_device *dev = ifa->ifa_dev->dev; |
751 | struct uml_net_private *lp; | |
752 | void (*proc)(unsigned char *, unsigned char *, void *); | |
753 | unsigned char addr_buf[4], netmask_buf[4]; | |
754 | ||
ebe28bb4 | 755 | if (dev->netdev_ops->ndo_open != uml_net_open) |
4ea21cd9 | 756 | return NOTIFY_DONE; |
1da177e4 | 757 | |
17c324fa | 758 | lp = netdev_priv(dev); |
1da177e4 LT |
759 | |
760 | proc = NULL; | |
cd1ae0e4 | 761 | switch (event) { |
1da177e4 LT |
762 | case NETDEV_UP: |
763 | proc = lp->add_address; | |
764 | break; | |
765 | case NETDEV_DOWN: | |
766 | proc = lp->delete_address; | |
767 | break; | |
768 | } | |
cd1ae0e4 | 769 | if (proc != NULL) { |
0e76422c BS |
770 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
771 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
772 | (*proc)(addr_buf, netmask_buf, &lp->user); |
773 | } | |
4ea21cd9 | 774 | return NOTIFY_DONE; |
1da177e4 LT |
775 | } |
776 | ||
c862fc32 | 777 | /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
074a0db8 | 778 | static struct notifier_block uml_inetaddr_notifier = { |
1da177e4 LT |
779 | .notifier_call = uml_inetaddr_event, |
780 | }; | |
781 | ||
32f862c3 | 782 | static void inet_register(void) |
1da177e4 LT |
783 | { |
784 | struct list_head *ele; | |
f28169d2 | 785 | struct uml_net_private *lp; |
1da177e4 LT |
786 | struct in_device *ip; |
787 | struct in_ifaddr *in; | |
788 | ||
1da177e4 LT |
789 | register_inetaddr_notifier(¨_inetaddr_notifier); |
790 | ||
791 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
792 | * didn't get a chance to run for them. This fakes it so that | |
793 | * addresses which have already been set up get handled properly. | |
794 | */ | |
c862fc32 | 795 | spin_lock(&opened_lock); |
cd1ae0e4 | 796 | list_for_each(ele, &opened) { |
1da177e4 LT |
797 | lp = list_entry(ele, struct uml_net_private, list); |
798 | ip = lp->dev->ip_ptr; | |
cd1ae0e4 | 799 | if (ip == NULL) |
c862fc32 | 800 | continue; |
1da177e4 | 801 | in = ip->ifa_list; |
cd1ae0e4 | 802 | while (in != NULL) { |
1da177e4 LT |
803 | uml_inetaddr_event(NULL, NETDEV_UP, in); |
804 | in = in->ifa_next; | |
805 | } | |
f28169d2 | 806 | } |
c862fc32 | 807 | spin_unlock(&opened_lock); |
32f862c3 JD |
808 | } |
809 | #else | |
810 | static inline void inet_register(void) | |
811 | { | |
812 | } | |
813 | #endif | |
1da177e4 | 814 | |
32f862c3 JD |
815 | static int uml_net_init(void) |
816 | { | |
817 | mconsole_register_dev(&net_mc); | |
818 | inet_register(); | |
c862fc32 | 819 | return 0; |
1da177e4 LT |
820 | } |
821 | ||
822 | __initcall(uml_net_init); | |
823 | ||
824 | static void close_devices(void) | |
825 | { | |
826 | struct list_head *ele; | |
827 | struct uml_net_private *lp; | |
828 | ||
c862fc32 | 829 | spin_lock(&opened_lock); |
cd1ae0e4 | 830 | list_for_each(ele, &opened) { |
1da177e4 | 831 | lp = list_entry(ele, struct uml_net_private, list); |
8d93c700 | 832 | free_irq(lp->dev->irq, lp->dev); |
cd1ae0e4 | 833 | if ((lp->close != NULL) && (lp->fd >= 0)) |
1da177e4 | 834 | (*lp->close)(lp->fd, &lp->user); |
cd1ae0e4 | 835 | if (lp->remove != NULL) |
c862fc32 | 836 | (*lp->remove)(&lp->user); |
1da177e4 | 837 | } |
c862fc32 | 838 | spin_unlock(&opened_lock); |
1da177e4 LT |
839 | } |
840 | ||
841 | __uml_exitcall(close_devices); | |
842 | ||
f28169d2 JD |
843 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
844 | void *), | |
1da177e4 LT |
845 | void *arg) |
846 | { | |
847 | struct net_device *dev = d; | |
848 | struct in_device *ip = dev->ip_ptr; | |
849 | struct in_ifaddr *in; | |
850 | unsigned char address[4], netmask[4]; | |
851 | ||
cd1ae0e4 | 852 | if (ip == NULL) return; |
1da177e4 | 853 | in = ip->ifa_list; |
cd1ae0e4 | 854 | while (in != NULL) { |
0e76422c BS |
855 | memcpy(address, &in->ifa_address, sizeof(address)); |
856 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
857 | (*cb)(address, netmask, arg); |
858 | in = in->ifa_next; | |
859 | } | |
860 | } | |
861 | ||
862 | int dev_netmask(void *d, void *m) | |
863 | { | |
864 | struct net_device *dev = d; | |
865 | struct in_device *ip = dev->ip_ptr; | |
866 | struct in_ifaddr *in; | |
a144ea4b | 867 | __be32 *mask_out = m; |
1da177e4 | 868 | |
cd1ae0e4 JD |
869 | if (ip == NULL) |
870 | return 1; | |
1da177e4 LT |
871 | |
872 | in = ip->ifa_list; | |
cd1ae0e4 JD |
873 | if (in == NULL) |
874 | return 1; | |
1da177e4 LT |
875 | |
876 | *mask_out = in->ifa_mask; | |
cd1ae0e4 | 877 | return 0; |
1da177e4 LT |
878 | } |
879 | ||
880 | void *get_output_buffer(int *len_out) | |
881 | { | |
882 | void *ret; | |
883 | ||
884 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
cd1ae0e4 | 885 | if (ret) *len_out = PAGE_SIZE; |
1da177e4 | 886 | else *len_out = 0; |
4ea21cd9 | 887 | return ret; |
1da177e4 LT |
888 | } |
889 | ||
890 | void free_output_buffer(void *buffer) | |
891 | { | |
892 | free_pages((unsigned long) buffer, 0); | |
893 | } | |
894 | ||
f28169d2 | 895 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
1da177e4 LT |
896 | char **gate_addr) |
897 | { | |
898 | char *remain; | |
899 | ||
900 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
cd1ae0e4 JD |
901 | if (remain != NULL) { |
902 | printk(KERN_ERR "tap_setup_common - Extra garbage on " | |
903 | "specification : '%s'\n", remain); | |
904 | return 1; | |
1da177e4 LT |
905 | } |
906 | ||
cd1ae0e4 | 907 | return 0; |
1da177e4 LT |
908 | } |
909 | ||
910 | unsigned short eth_protocol(struct sk_buff *skb) | |
911 | { | |
cd1ae0e4 | 912 | return eth_type_trans(skb, skb->dev); |
1da177e4 | 913 | } |