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> |
37185b33 AV |
21 | #include <init.h> |
22 | #include <irq_kern.h> | |
23 | #include <irq_user.h> | |
cd1ae0e4 | 24 | #include "mconsole_kern.h" |
37185b33 AV |
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, | |
c0b79a90 | 164 | 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 | |
fa7a0449 | 198 | um_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); |
55ea1cfa | 221 | skb_tx_timestamp(skb); |
1da177e4 | 222 | |
cd1ae0e4 | 223 | if (len == skb->len) { |
cfa8707a SH |
224 | dev->stats.tx_packets++; |
225 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
226 | dev->trans_start = jiffies; |
227 | netif_start_queue(dev); | |
228 | ||
229 | /* this is normally done in the interrupt when tx finishes */ | |
230 | netif_wake_queue(dev); | |
f28169d2 | 231 | } |
cd1ae0e4 | 232 | else if (len == 0) { |
1da177e4 | 233 | netif_start_queue(dev); |
cfa8707a | 234 | dev->stats.tx_dropped++; |
1da177e4 LT |
235 | } |
236 | else { | |
237 | netif_start_queue(dev); | |
238 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); | |
239 | } | |
240 | ||
241 | spin_unlock_irqrestore(&lp->lock, flags); | |
242 | ||
fabfb91d | 243 | dev_consume_skb_any(skb); |
1da177e4 | 244 | |
6ed10654 | 245 | return NETDEV_TX_OK; |
1da177e4 LT |
246 | } |
247 | ||
1da177e4 LT |
248 | static void uml_net_set_multicast_list(struct net_device *dev) |
249 | { | |
f70c1766 | 250 | return; |
1da177e4 LT |
251 | } |
252 | ||
253 | static void uml_net_tx_timeout(struct net_device *dev) | |
254 | { | |
255 | dev->trans_start = jiffies; | |
256 | netif_wake_queue(dev); | |
257 | } | |
258 | ||
1da177e4 LT |
259 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) |
260 | { | |
1da177e4 LT |
261 | dev->mtu = new_mtu; |
262 | ||
b53f35a8 | 263 | return 0; |
1da177e4 LT |
264 | } |
265 | ||
dd71dc4c RW |
266 | #ifdef CONFIG_NET_POLL_CONTROLLER |
267 | static void uml_net_poll_controller(struct net_device *dev) | |
268 | { | |
269 | disable_irq(dev->irq); | |
270 | uml_net_interrupt(dev->irq, dev); | |
271 | enable_irq(dev->irq); | |
272 | } | |
273 | #endif | |
274 | ||
6d387484 CH |
275 | static void uml_net_get_drvinfo(struct net_device *dev, |
276 | struct ethtool_drvinfo *info) | |
1da177e4 | 277 | { |
7826d43f JP |
278 | strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); |
279 | strlcpy(info->version, "42", sizeof(info->version)); | |
1da177e4 LT |
280 | } |
281 | ||
0fc0b732 | 282 | static const struct ethtool_ops uml_net_ethtool_ops = { |
6d387484 CH |
283 | .get_drvinfo = uml_net_get_drvinfo, |
284 | .get_link = ethtool_op_get_link, | |
55ea1cfa | 285 | .get_ts_info = ethtool_op_get_ts_info, |
6d387484 CH |
286 | }; |
287 | ||
074a0db8 | 288 | static void uml_net_user_timer_expire(unsigned long _conn) |
1da177e4 LT |
289 | { |
290 | #ifdef undef | |
291 | struct connection *conn = (struct connection *)_conn; | |
292 | ||
293 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); | |
294 | do_connect(conn); | |
295 | #endif | |
296 | } | |
297 | ||
646cbcda | 298 | static void setup_etheraddr(struct net_device *dev, char *str) |
b10aeeef | 299 | { |
646cbcda | 300 | unsigned char *addr = dev->dev_addr; |
b10aeeef JD |
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 | } |
646cbcda | 340 | return; |
b10aeeef JD |
341 | |
342 | random: | |
e024715f | 343 | printk(KERN_INFO |
646cbcda JP |
344 | "Choosing a random ethernet address for device %s\n", dev->name); |
345 | eth_hw_addr_random(dev); | |
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, | |
afc4b13d | 374 | .ndo_set_rx_mode = uml_net_set_multicast_list, |
8bb95b39 | 375 | .ndo_tx_timeout = uml_net_tx_timeout, |
9337057d | 376 | .ndo_set_mac_address = eth_mac_addr, |
8bb95b39 | 377 | .ndo_change_mtu = uml_net_change_mtu, |
8bb95b39 | 378 | .ndo_validate_addr = eth_validate_addr, |
dd71dc4c RW |
379 | #ifdef CONFIG_NET_POLL_CONTROLLER |
380 | .ndo_poll_controller = uml_net_poll_controller, | |
381 | #endif | |
8bb95b39 SH |
382 | }; |
383 | ||
80e39311 JD |
384 | /* |
385 | * Ensures that platform_driver_register is called only once by | |
386 | * eth_configure. Will be set in an initcall. | |
387 | */ | |
388 | static int driver_registered; | |
389 | ||
f34d9d2d JD |
390 | static void eth_configure(int n, void *init, char *mac, |
391 | struct transport *transport) | |
1da177e4 LT |
392 | { |
393 | struct uml_net *device; | |
394 | struct net_device *dev; | |
395 | struct uml_net_private *lp; | |
c74c69b4 | 396 | int err, size; |
1da177e4 | 397 | |
c74c69b4 | 398 | size = transport->private_size + sizeof(struct uml_net_private); |
1da177e4 | 399 | |
0268bd0a | 400 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
1da177e4 | 401 | if (device == NULL) { |
8c840835 PBG |
402 | printk(KERN_ERR "eth_configure failed to allocate struct " |
403 | "uml_net\n"); | |
f34d9d2d | 404 | return; |
1da177e4 LT |
405 | } |
406 | ||
8c840835 PBG |
407 | dev = alloc_etherdev(size); |
408 | if (dev == NULL) { | |
409 | printk(KERN_ERR "eth_configure: failed to allocate struct " | |
410 | "net_device for eth%d\n", n); | |
411 | goto out_free_device; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | INIT_LIST_HEAD(&device->list); |
415 | device->index = n; | |
416 | ||
e024715f PBG |
417 | /* If this name ends up conflicting with an existing registered |
418 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
419 | * and fail. | |
420 | */ | |
8c840835 | 421 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
e024715f | 422 | |
646cbcda | 423 | setup_etheraddr(dev, mac); |
1da177e4 | 424 | |
646cbcda | 425 | printk(KERN_INFO "Netdevice %d (%pM) : ", n, dev->dev_addr); |
1da177e4 | 426 | |
17c324fa | 427 | lp = netdev_priv(dev); |
e56a7885 PBG |
428 | /* This points to the transport private data. It's still clear, but we |
429 | * must memset it to 0 *now*. Let's help the drivers. */ | |
430 | memset(lp, 0, size); | |
eff3b634 | 431 | INIT_WORK(&lp->work, uml_dev_close); |
e56a7885 | 432 | |
1da177e4 LT |
433 | /* sysfs register */ |
434 | if (!driver_registered) { | |
3ae5eaec | 435 | platform_driver_register(¨_net_driver); |
1da177e4 LT |
436 | driver_registered = 1; |
437 | } | |
438 | device->pdev.id = n; | |
439 | device->pdev.name = DRIVER_NAME; | |
2e3f5251 | 440 | device->pdev.dev.release = net_device_release; |
8691b97b | 441 | dev_set_drvdata(&device->pdev.dev, device); |
cd1ae0e4 | 442 | if (platform_device_register(&device->pdev)) |
f34d9d2d | 443 | goto out_free_netdev; |
1da177e4 LT |
444 | SET_NETDEV_DEV(dev,&device->pdev.dev); |
445 | ||
1da177e4 LT |
446 | device->dev = dev; |
447 | ||
f34d9d2d JD |
448 | /* |
449 | * These just fill in a data structure, so there's no failure | |
450 | * to be worried about. | |
451 | */ | |
1da177e4 LT |
452 | (*transport->kern->init)(dev, init); |
453 | ||
1da177e4 LT |
454 | *lp = ((struct uml_net_private) |
455 | { .list = LIST_HEAD_INIT(lp->list), | |
456 | .dev = dev, | |
457 | .fd = -1, | |
458 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, | |
b53f35a8 | 459 | .max_packet = transport->user->max_packet, |
1da177e4 LT |
460 | .protocol = transport->kern->protocol, |
461 | .open = transport->user->open, | |
462 | .close = transport->user->close, | |
463 | .remove = transport->user->remove, | |
464 | .read = transport->kern->read, | |
465 | .write = transport->kern->write, | |
466 | .add_address = transport->user->add_address, | |
b53f35a8 | 467 | .delete_address = transport->user->delete_address }); |
1da177e4 LT |
468 | |
469 | init_timer(&lp->tl); | |
470 | spin_lock_init(&lp->lock); | |
471 | lp->tl.function = uml_net_user_timer_expire; | |
646cbcda | 472 | memcpy(lp->mac, dev->dev_addr, sizeof(lp->mac)); |
1da177e4 | 473 | |
f34d9d2d JD |
474 | if ((transport->user->init != NULL) && |
475 | ((*transport->user->init)(&lp->user, dev) != 0)) | |
476 | goto out_unregister; | |
1da177e4 | 477 | |
b53f35a8 | 478 | dev->mtu = transport->user->mtu; |
8bb95b39 | 479 | dev->netdev_ops = ¨_netdev_ops; |
f34d9d2d JD |
480 | dev->ethtool_ops = ¨_net_ethtool_ops; |
481 | dev->watchdog_timeo = (HZ >> 1); | |
482 | dev->irq = UM_ETH_IRQ; | |
1da177e4 | 483 | |
605c1e57 JD |
484 | err = update_drop_skb(lp->max_packet); |
485 | if (err) | |
486 | goto out_undo_user_init; | |
487 | ||
f34d9d2d JD |
488 | rtnl_lock(); |
489 | err = register_netdevice(dev); | |
490 | rtnl_unlock(); | |
491 | if (err) | |
492 | goto out_undo_user_init; | |
493 | ||
494 | spin_lock(&devices_lock); | |
495 | list_add(&device->list, &devices); | |
496 | spin_unlock(&devices_lock); | |
497 | ||
498 | return; | |
499 | ||
500 | out_undo_user_init: | |
8c840835 | 501 | if (transport->user->remove != NULL) |
f34d9d2d JD |
502 | (*transport->user->remove)(&lp->user); |
503 | out_unregister: | |
504 | platform_device_unregister(&device->pdev); | |
7d98230a | 505 | return; /* platform_device_unregister frees dev and device */ |
f34d9d2d JD |
506 | out_free_netdev: |
507 | free_netdev(dev); | |
8c840835 | 508 | out_free_device: |
f34d9d2d | 509 | kfree(device); |
1da177e4 LT |
510 | } |
511 | ||
512 | static struct uml_net *find_device(int n) | |
513 | { | |
514 | struct uml_net *device; | |
515 | struct list_head *ele; | |
516 | ||
517 | spin_lock(&devices_lock); | |
cd1ae0e4 | 518 | list_for_each(ele, &devices) { |
1da177e4 | 519 | device = list_entry(ele, struct uml_net, list); |
cd1ae0e4 | 520 | if (device->index == n) |
1da177e4 LT |
521 | goto out; |
522 | } | |
523 | device = NULL; | |
524 | out: | |
525 | spin_unlock(&devices_lock); | |
4ea21cd9 | 526 | return device; |
1da177e4 LT |
527 | } |
528 | ||
f28169d2 JD |
529 | static int eth_parse(char *str, int *index_out, char **str_out, |
530 | char **error_out) | |
1da177e4 LT |
531 | { |
532 | char *end; | |
a419aef8 | 533 | int n, err = -EINVAL; |
1da177e4 LT |
534 | |
535 | n = simple_strtoul(str, &end, 0); | |
cd1ae0e4 | 536 | if (end == str) { |
f28169d2 JD |
537 | *error_out = "Bad device number"; |
538 | return err; | |
1da177e4 | 539 | } |
f28169d2 | 540 | |
1da177e4 | 541 | str = end; |
cd1ae0e4 | 542 | if (*str != '=') { |
f28169d2 JD |
543 | *error_out = "Expected '=' after device number"; |
544 | return err; | |
1da177e4 | 545 | } |
f28169d2 | 546 | |
1da177e4 | 547 | str++; |
cd1ae0e4 | 548 | if (find_device(n)) { |
f28169d2 JD |
549 | *error_out = "Device already configured"; |
550 | return err; | |
1da177e4 | 551 | } |
f28169d2 JD |
552 | |
553 | *index_out = n; | |
1da177e4 | 554 | *str_out = str; |
f28169d2 | 555 | return 0; |
1da177e4 LT |
556 | } |
557 | ||
558 | struct eth_init { | |
559 | struct list_head list; | |
560 | char *init; | |
561 | int index; | |
562 | }; | |
563 | ||
d3b7f69d JD |
564 | static DEFINE_SPINLOCK(transports_lock); |
565 | static LIST_HEAD(transports); | |
1da177e4 LT |
566 | |
567 | /* Filled in during early boot */ | |
c862fc32 | 568 | static LIST_HEAD(eth_cmd_line); |
1da177e4 LT |
569 | |
570 | static int check_transport(struct transport *transport, char *eth, int n, | |
571 | void **init_out, char **mac_out) | |
572 | { | |
573 | int len; | |
574 | ||
575 | len = strlen(transport->name); | |
cd1ae0e4 | 576 | if (strncmp(eth, transport->name, len)) |
4ea21cd9 | 577 | return 0; |
1da177e4 LT |
578 | |
579 | eth += len; | |
cd1ae0e4 | 580 | if (*eth == ',') |
1da177e4 | 581 | eth++; |
cd1ae0e4 | 582 | else if (*eth != '\0') |
4ea21cd9 | 583 | return 0; |
1da177e4 LT |
584 | |
585 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); | |
cd1ae0e4 | 586 | if (*init_out == NULL) |
4ea21cd9 | 587 | return 1; |
1da177e4 | 588 | |
cd1ae0e4 | 589 | if (!transport->setup(eth, mac_out, *init_out)) { |
1da177e4 LT |
590 | kfree(*init_out); |
591 | *init_out = NULL; | |
592 | } | |
4ea21cd9 | 593 | return 1; |
1da177e4 LT |
594 | } |
595 | ||
596 | void register_transport(struct transport *new) | |
597 | { | |
598 | struct list_head *ele, *next; | |
599 | struct eth_init *eth; | |
600 | void *init; | |
601 | char *mac = NULL; | |
602 | int match; | |
603 | ||
d3b7f69d JD |
604 | spin_lock(&transports_lock); |
605 | BUG_ON(!list_empty(&new->list)); | |
1da177e4 | 606 | list_add(&new->list, &transports); |
d3b7f69d | 607 | spin_unlock(&transports_lock); |
1da177e4 | 608 | |
cd1ae0e4 | 609 | list_for_each_safe(ele, next, ð_cmd_line) { |
1da177e4 LT |
610 | eth = list_entry(ele, struct eth_init, list); |
611 | match = check_transport(new, eth->init, eth->index, &init, | |
612 | &mac); | |
cd1ae0e4 | 613 | if (!match) |
1da177e4 | 614 | continue; |
cd1ae0e4 | 615 | else if (init != NULL) { |
1da177e4 LT |
616 | eth_configure(eth->index, init, mac, new); |
617 | kfree(init); | |
618 | } | |
619 | list_del(ð->list); | |
620 | } | |
621 | } | |
622 | ||
623 | static int eth_setup_common(char *str, int index) | |
624 | { | |
625 | struct list_head *ele; | |
626 | struct transport *transport; | |
627 | void *init; | |
628 | char *mac = NULL; | |
c862fc32 | 629 | int found = 0; |
1da177e4 | 630 | |
c862fc32 | 631 | spin_lock(&transports_lock); |
cd1ae0e4 | 632 | list_for_each(ele, &transports) { |
1da177e4 | 633 | transport = list_entry(ele, struct transport, list); |
cd1ae0e4 | 634 | if (!check_transport(transport, str, index, &init, &mac)) |
1da177e4 | 635 | continue; |
cd1ae0e4 | 636 | if (init != NULL) { |
1da177e4 LT |
637 | eth_configure(index, init, mac, transport); |
638 | kfree(init); | |
639 | } | |
c862fc32 JD |
640 | found = 1; |
641 | break; | |
1da177e4 | 642 | } |
c862fc32 JD |
643 | |
644 | spin_unlock(&transports_lock); | |
645 | return found; | |
1da177e4 LT |
646 | } |
647 | ||
97a1fcbb | 648 | static int __init eth_setup(char *str) |
1da177e4 LT |
649 | { |
650 | struct eth_init *new; | |
f28169d2 | 651 | char *error; |
1da177e4 LT |
652 | int n, err; |
653 | ||
f28169d2 | 654 | err = eth_parse(str, &n, &str, &error); |
cd1ae0e4 | 655 | if (err) { |
f28169d2 JD |
656 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", |
657 | str, error); | |
1183dc94 | 658 | return 1; |
f28169d2 | 659 | } |
1da177e4 | 660 | |
1183dc94 | 661 | new = alloc_bootmem(sizeof(*new)); |
1da177e4 LT |
662 | |
663 | INIT_LIST_HEAD(&new->list); | |
664 | new->index = n; | |
665 | new->init = str; | |
666 | ||
667 | list_add_tail(&new->list, ð_cmd_line); | |
1183dc94 | 668 | return 1; |
1da177e4 LT |
669 | } |
670 | ||
671 | __setup("eth", eth_setup); | |
672 | __uml_help(eth_setup, | |
673 | "eth[0-9]+=<transport>,<options>\n" | |
674 | " Configure a network device.\n\n" | |
675 | ); | |
676 | ||
f28169d2 | 677 | static int net_config(char *str, char **error_out) |
1da177e4 LT |
678 | { |
679 | int n, err; | |
680 | ||
f28169d2 | 681 | err = eth_parse(str, &n, &str, error_out); |
cd1ae0e4 | 682 | if (err) |
f28169d2 | 683 | return err; |
1da177e4 | 684 | |
f28169d2 JD |
685 | /* This string is broken up and the pieces used by the underlying |
686 | * driver. So, it is freed only if eth_setup_common fails. | |
687 | */ | |
970d6e3a | 688 | str = kstrdup(str, GFP_KERNEL); |
cd1ae0e4 | 689 | if (str == NULL) { |
f28169d2 JD |
690 | *error_out = "net_config failed to strdup string"; |
691 | return -ENOMEM; | |
1da177e4 LT |
692 | } |
693 | err = !eth_setup_common(str, n); | |
cd1ae0e4 | 694 | if (err) |
1da177e4 | 695 | kfree(str); |
cd1ae0e4 | 696 | return err; |
1da177e4 LT |
697 | } |
698 | ||
29d56cfe JD |
699 | static int net_id(char **str, int *start_out, int *end_out) |
700 | { | |
cd1ae0e4 JD |
701 | char *end; |
702 | int n; | |
29d56cfe JD |
703 | |
704 | n = simple_strtoul(*str, &end, 0); | |
cd1ae0e4 | 705 | if ((*end != '\0') || (end == *str)) |
29d56cfe JD |
706 | return -1; |
707 | ||
cd1ae0e4 JD |
708 | *start_out = n; |
709 | *end_out = n; | |
710 | *str = end; | |
711 | return n; | |
29d56cfe JD |
712 | } |
713 | ||
f28169d2 | 714 | static int net_remove(int n, char **error_out) |
1da177e4 LT |
715 | { |
716 | struct uml_net *device; | |
717 | struct net_device *dev; | |
718 | struct uml_net_private *lp; | |
1da177e4 LT |
719 | |
720 | device = find_device(n); | |
cd1ae0e4 | 721 | if (device == NULL) |
29d56cfe | 722 | return -ENODEV; |
1da177e4 LT |
723 | |
724 | dev = device->dev; | |
17c324fa | 725 | lp = netdev_priv(dev); |
cd1ae0e4 | 726 | if (lp->fd > 0) |
4ea21cd9 | 727 | return -EBUSY; |
1da177e4 LT |
728 | unregister_netdev(dev); |
729 | platform_device_unregister(&device->pdev); | |
730 | ||
29d56cfe | 731 | return 0; |
1da177e4 LT |
732 | } |
733 | ||
734 | static struct mc_device net_mc = { | |
84f48d4f | 735 | .list = LIST_HEAD_INIT(net_mc.list), |
1da177e4 LT |
736 | .name = "eth", |
737 | .config = net_config, | |
738 | .get_config = NULL, | |
4ea21cd9 | 739 | .id = net_id, |
1da177e4 LT |
740 | .remove = net_remove, |
741 | }; | |
742 | ||
32f862c3 | 743 | #ifdef CONFIG_INET |
1da177e4 LT |
744 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, |
745 | void *ptr) | |
746 | { | |
747 | struct in_ifaddr *ifa = ptr; | |
1da177e4 LT |
748 | struct net_device *dev = ifa->ifa_dev->dev; |
749 | struct uml_net_private *lp; | |
750 | void (*proc)(unsigned char *, unsigned char *, void *); | |
751 | unsigned char addr_buf[4], netmask_buf[4]; | |
752 | ||
ebe28bb4 | 753 | if (dev->netdev_ops->ndo_open != uml_net_open) |
4ea21cd9 | 754 | return NOTIFY_DONE; |
1da177e4 | 755 | |
17c324fa | 756 | lp = netdev_priv(dev); |
1da177e4 LT |
757 | |
758 | proc = NULL; | |
cd1ae0e4 | 759 | switch (event) { |
1da177e4 LT |
760 | case NETDEV_UP: |
761 | proc = lp->add_address; | |
762 | break; | |
763 | case NETDEV_DOWN: | |
764 | proc = lp->delete_address; | |
765 | break; | |
766 | } | |
cd1ae0e4 | 767 | if (proc != NULL) { |
0e76422c BS |
768 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
769 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); | |
1da177e4 LT |
770 | (*proc)(addr_buf, netmask_buf, &lp->user); |
771 | } | |
4ea21cd9 | 772 | return NOTIFY_DONE; |
1da177e4 LT |
773 | } |
774 | ||
c862fc32 | 775 | /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
074a0db8 | 776 | static struct notifier_block uml_inetaddr_notifier = { |
1da177e4 LT |
777 | .notifier_call = uml_inetaddr_event, |
778 | }; | |
779 | ||
32f862c3 | 780 | static void inet_register(void) |
1da177e4 LT |
781 | { |
782 | struct list_head *ele; | |
f28169d2 | 783 | struct uml_net_private *lp; |
1da177e4 LT |
784 | struct in_device *ip; |
785 | struct in_ifaddr *in; | |
786 | ||
1da177e4 LT |
787 | register_inetaddr_notifier(¨_inetaddr_notifier); |
788 | ||
789 | /* Devices may have been opened already, so the uml_inetaddr_notifier | |
790 | * didn't get a chance to run for them. This fakes it so that | |
791 | * addresses which have already been set up get handled properly. | |
792 | */ | |
c862fc32 | 793 | spin_lock(&opened_lock); |
cd1ae0e4 | 794 | list_for_each(ele, &opened) { |
1da177e4 LT |
795 | lp = list_entry(ele, struct uml_net_private, list); |
796 | ip = lp->dev->ip_ptr; | |
cd1ae0e4 | 797 | if (ip == NULL) |
c862fc32 | 798 | continue; |
1da177e4 | 799 | in = ip->ifa_list; |
cd1ae0e4 | 800 | while (in != NULL) { |
1da177e4 LT |
801 | uml_inetaddr_event(NULL, NETDEV_UP, in); |
802 | in = in->ifa_next; | |
803 | } | |
f28169d2 | 804 | } |
c862fc32 | 805 | spin_unlock(&opened_lock); |
32f862c3 JD |
806 | } |
807 | #else | |
808 | static inline void inet_register(void) | |
809 | { | |
810 | } | |
811 | #endif | |
1da177e4 | 812 | |
32f862c3 JD |
813 | static int uml_net_init(void) |
814 | { | |
815 | mconsole_register_dev(&net_mc); | |
816 | inet_register(); | |
c862fc32 | 817 | return 0; |
1da177e4 LT |
818 | } |
819 | ||
820 | __initcall(uml_net_init); | |
821 | ||
822 | static void close_devices(void) | |
823 | { | |
824 | struct list_head *ele; | |
825 | struct uml_net_private *lp; | |
826 | ||
c862fc32 | 827 | spin_lock(&opened_lock); |
cd1ae0e4 | 828 | list_for_each(ele, &opened) { |
1da177e4 | 829 | lp = list_entry(ele, struct uml_net_private, list); |
fa7a0449 | 830 | um_free_irq(lp->dev->irq, lp->dev); |
cd1ae0e4 | 831 | if ((lp->close != NULL) && (lp->fd >= 0)) |
1da177e4 | 832 | (*lp->close)(lp->fd, &lp->user); |
cd1ae0e4 | 833 | if (lp->remove != NULL) |
c862fc32 | 834 | (*lp->remove)(&lp->user); |
1da177e4 | 835 | } |
c862fc32 | 836 | spin_unlock(&opened_lock); |
1da177e4 LT |
837 | } |
838 | ||
839 | __uml_exitcall(close_devices); | |
840 | ||
f28169d2 JD |
841 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
842 | void *), | |
1da177e4 LT |
843 | void *arg) |
844 | { | |
845 | struct net_device *dev = d; | |
846 | struct in_device *ip = dev->ip_ptr; | |
847 | struct in_ifaddr *in; | |
848 | unsigned char address[4], netmask[4]; | |
849 | ||
cd1ae0e4 | 850 | if (ip == NULL) return; |
1da177e4 | 851 | in = ip->ifa_list; |
cd1ae0e4 | 852 | while (in != NULL) { |
0e76422c BS |
853 | memcpy(address, &in->ifa_address, sizeof(address)); |
854 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); | |
1da177e4 LT |
855 | (*cb)(address, netmask, arg); |
856 | in = in->ifa_next; | |
857 | } | |
858 | } | |
859 | ||
860 | int dev_netmask(void *d, void *m) | |
861 | { | |
862 | struct net_device *dev = d; | |
863 | struct in_device *ip = dev->ip_ptr; | |
864 | struct in_ifaddr *in; | |
a144ea4b | 865 | __be32 *mask_out = m; |
1da177e4 | 866 | |
cd1ae0e4 JD |
867 | if (ip == NULL) |
868 | return 1; | |
1da177e4 LT |
869 | |
870 | in = ip->ifa_list; | |
cd1ae0e4 JD |
871 | if (in == NULL) |
872 | return 1; | |
1da177e4 LT |
873 | |
874 | *mask_out = in->ifa_mask; | |
cd1ae0e4 | 875 | return 0; |
1da177e4 LT |
876 | } |
877 | ||
878 | void *get_output_buffer(int *len_out) | |
879 | { | |
880 | void *ret; | |
881 | ||
882 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); | |
cd1ae0e4 | 883 | if (ret) *len_out = PAGE_SIZE; |
1da177e4 | 884 | else *len_out = 0; |
4ea21cd9 | 885 | return ret; |
1da177e4 LT |
886 | } |
887 | ||
888 | void free_output_buffer(void *buffer) | |
889 | { | |
890 | free_pages((unsigned long) buffer, 0); | |
891 | } | |
892 | ||
f28169d2 | 893 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
1da177e4 LT |
894 | char **gate_addr) |
895 | { | |
896 | char *remain; | |
897 | ||
898 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); | |
cd1ae0e4 JD |
899 | if (remain != NULL) { |
900 | printk(KERN_ERR "tap_setup_common - Extra garbage on " | |
901 | "specification : '%s'\n", remain); | |
902 | return 1; | |
1da177e4 LT |
903 | } |
904 | ||
cd1ae0e4 | 905 | return 0; |
1da177e4 LT |
906 | } |
907 | ||
908 | unsigned short eth_protocol(struct sk_buff *skb) | |
909 | { | |
cd1ae0e4 | 910 | return eth_type_trans(skb, skb->dev); |
1da177e4 | 911 | } |