Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 2 | * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 3 | * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 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> |
| 19 | #include <linux/spinlock.h> |
| 20 | #include "init.h" |
| 21 | #include "irq_kern.h" |
| 22 | #include "irq_user.h" |
| 23 | #include "mconsole_kern.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "net_kern.h" |
| 25 | #include "net_user.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Paolo 'Blaisorblade' Giarrusso | bf61f50 | 2006-09-25 23:33:07 -0700 | [diff] [blame] | 27 | static inline void set_ether_mac(struct net_device *dev, unsigned char *addr) |
| 28 | { |
| 29 | memcpy(dev->dev_addr, addr, ETH_ALEN); |
| 30 | } |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #define DRIVER_NAME "uml-netdev" |
| 33 | |
| 34 | static DEFINE_SPINLOCK(opened_lock); |
Jeff Dike | 9010772 | 2006-01-06 00:18:54 -0800 | [diff] [blame] | 35 | static LIST_HEAD(opened); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 37 | /* |
| 38 | * The drop_skb is used when we can't allocate an skb. The |
| 39 | * packet is read into drop_skb in order to get the data off the |
| 40 | * connection to the host. |
| 41 | * It is reallocated whenever a maximum packet size is seen which is |
| 42 | * larger than any seen before. update_drop_skb is called from |
| 43 | * eth_configure when a new interface is added. |
| 44 | */ |
| 45 | static DEFINE_SPINLOCK(drop_lock); |
| 46 | static struct sk_buff *drop_skb; |
| 47 | static int drop_max; |
| 48 | |
| 49 | static int update_drop_skb(int max) |
| 50 | { |
| 51 | struct sk_buff *new; |
| 52 | unsigned long flags; |
| 53 | int err = 0; |
| 54 | |
| 55 | spin_lock_irqsave(&drop_lock, flags); |
| 56 | |
| 57 | if (max <= drop_max) |
| 58 | goto out; |
| 59 | |
| 60 | err = -ENOMEM; |
| 61 | new = dev_alloc_skb(max); |
| 62 | if (new == NULL) |
| 63 | goto out; |
| 64 | |
| 65 | skb_put(new, max); |
| 66 | |
| 67 | kfree_skb(drop_skb); |
| 68 | drop_skb = new; |
| 69 | drop_max = max; |
| 70 | err = 0; |
| 71 | out: |
| 72 | spin_unlock_irqrestore(&drop_lock, flags); |
| 73 | |
| 74 | return err; |
| 75 | } |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static int uml_net_rx(struct net_device *dev) |
| 78 | { |
| 79 | struct uml_net_private *lp = dev->priv; |
| 80 | int pkt_len; |
| 81 | struct sk_buff *skb; |
| 82 | |
| 83 | /* If we can't allocate memory, try again next round. */ |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 84 | skb = dev_alloc_skb(lp->max_packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | if (skb == NULL) { |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 86 | drop_skb->dev = dev; |
| 87 | /* Read a packet into drop_skb and don't do anything with it. */ |
| 88 | (*lp->read)(lp->fd, drop_skb, lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | lp->stats.rx_dropped++; |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | skb->dev = dev; |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 94 | skb_put(skb, lp->max_packet); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 95 | skb_reset_mac_header(skb); |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 96 | pkt_len = (*lp->read)(lp->fd, skb, lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | if (pkt_len > 0) { |
| 99 | skb_trim(skb, pkt_len); |
| 100 | skb->protocol = (*lp->protocol)(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | lp->stats.rx_bytes += skb->len; |
| 103 | lp->stats.rx_packets++; |
Julia Lawall | 505a41d | 2007-12-10 17:14:46 -0800 | [diff] [blame] | 104 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return pkt_len; |
| 106 | } |
| 107 | |
| 108 | kfree_skb(skb); |
| 109 | return pkt_len; |
| 110 | } |
| 111 | |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 112 | static void uml_dev_close(struct work_struct *work) |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 113 | { |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 114 | struct uml_net_private *lp = |
| 115 | container_of(work, struct uml_net_private, work); |
| 116 | dev_close(lp->dev); |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 117 | } |
| 118 | |
Al Viro | 7bea96f | 2006-10-08 22:49:34 +0100 | [diff] [blame] | 119 | irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
| 121 | struct net_device *dev = dev_id; |
| 122 | struct uml_net_private *lp = dev->priv; |
| 123 | int err; |
| 124 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 125 | if (!netif_running(dev)) |
| 126 | return IRQ_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | spin_lock(&lp->lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 129 | while ((err = uml_net_rx(dev)) > 0) ; |
| 130 | if (err < 0) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 131 | printk(KERN_ERR |
| 132 | "Device '%s' read returned %d, shutting it down\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | dev->name, err); |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 134 | /* dev_close can't be called in interrupt context, and takes |
| 135 | * again lp->lock. |
| 136 | * And dev_close() can be safely called multiple times on the |
| 137 | * same device, since it tests for (dev->flags & IFF_UP). So |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 138 | * there's no harm in delaying the device shutdown. |
| 139 | * Furthermore, the workqueue will not re-enqueue an already |
| 140 | * enqueued work item. */ |
| 141 | schedule_work(&lp->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | goto out; |
| 143 | } |
| 144 | reactivate_fd(lp->fd, UM_ETH_IRQ); |
| 145 | |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 146 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | spin_unlock(&lp->lock); |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 148 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | static int uml_net_open(struct net_device *dev) |
| 152 | { |
| 153 | struct uml_net_private *lp = dev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | int err; |
| 155 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 156 | if (lp->fd >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | err = -ENXIO; |
| 158 | goto out; |
| 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | lp->fd = (*lp->open)(&lp->user); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 162 | if (lp->fd < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | err = lp->fd; |
| 164 | goto out; |
| 165 | } |
| 166 | |
| 167 | err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, |
Thomas Gleixner | bd6aa65 | 2006-07-01 19:29:27 -0700 | [diff] [blame] | 168 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 169 | if (err != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | err = -ENETUNREACH; |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 172 | goto out_close; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | lp->tl.data = (unsigned long) &lp->user; |
| 176 | netif_start_queue(dev); |
| 177 | |
| 178 | /* clear buffer - it can happen that the host side of the interface |
| 179 | * is full when we get here. In this case, new data is never queued, |
| 180 | * SIGIOs never arrive, and the net never works. |
| 181 | */ |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 182 | while ((err = uml_net_rx(dev)) > 0) ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 184 | spin_lock(&opened_lock); |
| 185 | list_add(&lp->list, &opened); |
| 186 | spin_unlock(&opened_lock); |
| 187 | |
| 188 | return 0; |
| 189 | out_close: |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 190 | if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user); |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 191 | lp->fd = -1; |
| 192 | out: |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 193 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | static int uml_net_close(struct net_device *dev) |
| 197 | { |
| 198 | struct uml_net_private *lp = dev->priv; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | netif_stop_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | free_irq(dev->irq, dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 203 | if (lp->close != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | (*lp->close)(lp->fd, &lp->user); |
| 205 | lp->fd = -1; |
| 206 | |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 207 | spin_lock(&opened_lock); |
| 208 | list_del(&lp->list); |
| 209 | spin_unlock(&opened_lock); |
| 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 215 | { |
| 216 | struct uml_net_private *lp = dev->priv; |
| 217 | unsigned long flags; |
| 218 | int len; |
| 219 | |
| 220 | netif_stop_queue(dev); |
| 221 | |
| 222 | spin_lock_irqsave(&lp->lock, flags); |
| 223 | |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 224 | len = (*lp->write)(lp->fd, skb, lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 226 | if (len == skb->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | lp->stats.tx_packets++; |
| 228 | lp->stats.tx_bytes += skb->len; |
| 229 | dev->trans_start = jiffies; |
| 230 | netif_start_queue(dev); |
| 231 | |
| 232 | /* this is normally done in the interrupt when tx finishes */ |
| 233 | netif_wake_queue(dev); |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 234 | } |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 235 | else if (len == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | netif_start_queue(dev); |
| 237 | lp->stats.tx_dropped++; |
| 238 | } |
| 239 | else { |
| 240 | netif_start_queue(dev); |
| 241 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); |
| 242 | } |
| 243 | |
| 244 | spin_unlock_irqrestore(&lp->lock, flags); |
| 245 | |
| 246 | dev_kfree_skb(skb); |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static struct net_device_stats *uml_net_get_stats(struct net_device *dev) |
| 252 | { |
| 253 | struct uml_net_private *lp = dev->priv; |
| 254 | return &lp->stats; |
| 255 | } |
| 256 | |
| 257 | static void uml_net_set_multicast_list(struct net_device *dev) |
| 258 | { |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 259 | if (dev->flags & IFF_PROMISC) |
| 260 | return; |
| 261 | else if (dev->mc_count) |
| 262 | dev->flags |= IFF_ALLMULTI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | else dev->flags &= ~IFF_ALLMULTI; |
| 264 | } |
| 265 | |
| 266 | static void uml_net_tx_timeout(struct net_device *dev) |
| 267 | { |
| 268 | dev->trans_start = jiffies; |
| 269 | netif_wake_queue(dev); |
| 270 | } |
| 271 | |
| 272 | static int uml_net_set_mac(struct net_device *dev, void *addr) |
| 273 | { |
| 274 | struct uml_net_private *lp = dev->priv; |
| 275 | struct sockaddr *hwaddr = addr; |
| 276 | |
Paolo 'Blaisorblade' Giarrusso | 48af05e | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 277 | spin_lock_irq(&lp->lock); |
Paolo 'Blaisorblade' Giarrusso | bf61f50 | 2006-09-25 23:33:07 -0700 | [diff] [blame] | 278 | set_ether_mac(dev, hwaddr->sa_data); |
Paolo 'Blaisorblade' Giarrusso | 48af05e | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 279 | spin_unlock_irq(&lp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 281 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) |
| 285 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | dev->mtu = new_mtu; |
| 287 | |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 288 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 291 | static void uml_net_get_drvinfo(struct net_device *dev, |
| 292 | struct ethtool_drvinfo *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 294 | strcpy(info->driver, DRIVER_NAME); |
| 295 | strcpy(info->version, "42"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 298 | static struct ethtool_ops uml_net_ethtool_ops = { |
| 299 | .get_drvinfo = uml_net_get_drvinfo, |
| 300 | .get_link = ethtool_op_get_link, |
| 301 | }; |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | void uml_net_user_timer_expire(unsigned long _conn) |
| 304 | { |
| 305 | #ifdef undef |
| 306 | struct connection *conn = (struct connection *)_conn; |
| 307 | |
| 308 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); |
| 309 | do_connect(conn); |
| 310 | #endif |
| 311 | } |
| 312 | |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 313 | static void setup_etheraddr(char *str, unsigned char *addr, char *name) |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 314 | { |
| 315 | char *end; |
| 316 | int i; |
| 317 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 318 | if (str == NULL) |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 319 | goto random; |
| 320 | |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 321 | for (i = 0; i < 6; i++) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 322 | addr[i] = simple_strtoul(str, &end, 16); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 323 | if ((end == str) || |
| 324 | ((*end != ':') && (*end != ',') && (*end != '\0'))) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 325 | printk(KERN_ERR |
| 326 | "setup_etheraddr: failed to parse '%s' " |
| 327 | "as an ethernet address\n", str); |
| 328 | goto random; |
| 329 | } |
| 330 | str = end + 1; |
| 331 | } |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 332 | if (is_multicast_ether_addr(addr)) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 333 | printk(KERN_ERR |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 334 | "Attempt to assign a multicast ethernet address to a " |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 335 | "device disallowed\n"); |
| 336 | goto random; |
| 337 | } |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 338 | if (!is_valid_ether_addr(addr)) { |
| 339 | printk(KERN_ERR |
| 340 | "Attempt to assign an invalid ethernet address to a " |
| 341 | "device disallowed\n"); |
| 342 | goto random; |
| 343 | } |
| 344 | if (!is_local_ether_addr(addr)) { |
| 345 | printk(KERN_WARNING |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 346 | "Warning: Assigning a globally valid ethernet " |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 347 | "address to a device\n"); |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 348 | printk(KERN_WARNING "You should set the 2nd rightmost bit in " |
| 349 | "the first byte of the MAC,\n"); |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 350 | printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 351 | addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4], |
| 352 | addr[5]); |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 353 | } |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 354 | return; |
| 355 | |
| 356 | random: |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 357 | printk(KERN_INFO |
| 358 | "Choosing a random ethernet address for device %s\n", name); |
Ollie Wild | d6c6410 | 2006-09-29 15:50:28 -0700 | [diff] [blame] | 359 | random_ether_addr(addr); |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 360 | } |
| 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | static DEFINE_SPINLOCK(devices_lock); |
Jeff Dike | 9010772 | 2006-01-06 00:18:54 -0800 | [diff] [blame] | 363 | static LIST_HEAD(devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 365 | static struct platform_driver uml_net_driver = { |
| 366 | .driver = { |
| 367 | .name = DRIVER_NAME, |
| 368 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 371 | static void net_device_release(struct device *dev) |
| 372 | { |
| 373 | struct uml_net *device = dev->driver_data; |
| 374 | struct net_device *netdev = device->dev; |
| 375 | struct uml_net_private *lp = netdev->priv; |
| 376 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 377 | if (lp->remove != NULL) |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 378 | (*lp->remove)(&lp->user); |
| 379 | list_del(&device->list); |
| 380 | kfree(device); |
| 381 | free_netdev(netdev); |
| 382 | } |
| 383 | |
Jeff Dike | 80e3931 | 2008-02-04 22:31:17 -0800 | [diff] [blame] | 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 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 390 | static void eth_configure(int n, void *init, char *mac, |
| 391 | struct transport *transport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
| 393 | struct uml_net *device; |
| 394 | struct net_device *dev; |
| 395 | struct uml_net_private *lp; |
Paolo 'Blaisorblade' Giarrusso | c74c69b | 2007-05-06 14:51:15 -0700 | [diff] [blame] | 396 | int err, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
Paolo 'Blaisorblade' Giarrusso | c74c69b | 2007-05-06 14:51:15 -0700 | [diff] [blame] | 398 | size = transport->private_size + sizeof(struct uml_net_private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Yan Burman | 0268bd0 | 2006-12-12 19:54:52 +0100 | [diff] [blame] | 400 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | if (device == NULL) { |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 402 | printk(KERN_ERR "eth_configure failed to allocate struct " |
| 403 | "uml_net\n"); |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 404 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | INIT_LIST_HEAD(&device->list); |
| 415 | device->index = n; |
| 416 | |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 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 | */ |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 421 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 422 | |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 423 | setup_etheraddr(mac, device->mac, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
| 425 | printk(KERN_INFO "Netdevice %d ", n); |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 426 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", |
| 427 | device->mac[0], device->mac[1], |
| 428 | device->mac[2], device->mac[3], |
| 429 | device->mac[4], device->mac[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | printk(": "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Paolo 'Blaisorblade' Giarrusso | e56a788 | 2006-01-18 17:42:55 -0800 | [diff] [blame] | 432 | lp = dev->priv; |
| 433 | /* This points to the transport private data. It's still clear, but we |
| 434 | * must memset it to 0 *now*. Let's help the drivers. */ |
| 435 | memset(lp, 0, size); |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 436 | INIT_WORK(&lp->work, uml_dev_close); |
Paolo 'Blaisorblade' Giarrusso | e56a788 | 2006-01-18 17:42:55 -0800 | [diff] [blame] | 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | /* sysfs register */ |
| 439 | if (!driver_registered) { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 440 | platform_driver_register(¨_net_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | driver_registered = 1; |
| 442 | } |
| 443 | device->pdev.id = n; |
| 444 | device->pdev.name = DRIVER_NAME; |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 445 | device->pdev.dev.release = net_device_release; |
| 446 | device->pdev.dev.driver_data = device; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 447 | if (platform_device_register(&device->pdev)) |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 448 | goto out_free_netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | SET_NETDEV_DEV(dev,&device->pdev.dev); |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | device->dev = dev; |
| 452 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 453 | /* |
| 454 | * These just fill in a data structure, so there's no failure |
| 455 | * to be worried about. |
| 456 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | (*transport->kern->init)(dev, init); |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | *lp = ((struct uml_net_private) |
| 460 | { .list = LIST_HEAD_INIT(lp->list), |
| 461 | .dev = dev, |
| 462 | .fd = -1, |
| 463 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 464 | .max_packet = transport->user->max_packet, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | .protocol = transport->kern->protocol, |
| 466 | .open = transport->user->open, |
| 467 | .close = transport->user->close, |
| 468 | .remove = transport->user->remove, |
| 469 | .read = transport->kern->read, |
| 470 | .write = transport->kern->write, |
| 471 | .add_address = transport->user->add_address, |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 472 | .delete_address = transport->user->delete_address }); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | init_timer(&lp->tl); |
| 475 | spin_lock_init(&lp->lock); |
| 476 | lp->tl.function = uml_net_user_timer_expire; |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 477 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 479 | if ((transport->user->init != NULL) && |
| 480 | ((*transport->user->init)(&lp->user, dev) != 0)) |
| 481 | goto out_unregister; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 483 | set_ether_mac(dev, device->mac); |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 484 | dev->mtu = transport->user->mtu; |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 485 | dev->open = uml_net_open; |
| 486 | dev->hard_start_xmit = uml_net_start_xmit; |
| 487 | dev->stop = uml_net_close; |
| 488 | dev->get_stats = uml_net_get_stats; |
| 489 | dev->set_multicast_list = uml_net_set_multicast_list; |
| 490 | dev->tx_timeout = uml_net_tx_timeout; |
| 491 | dev->set_mac_address = uml_net_set_mac; |
| 492 | dev->change_mtu = uml_net_change_mtu; |
| 493 | dev->ethtool_ops = ¨_net_ethtool_ops; |
| 494 | dev->watchdog_timeo = (HZ >> 1); |
| 495 | dev->irq = UM_ETH_IRQ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 497 | err = update_drop_skb(lp->max_packet); |
| 498 | if (err) |
| 499 | goto out_undo_user_init; |
| 500 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 501 | rtnl_lock(); |
| 502 | err = register_netdevice(dev); |
| 503 | rtnl_unlock(); |
| 504 | if (err) |
| 505 | goto out_undo_user_init; |
| 506 | |
| 507 | spin_lock(&devices_lock); |
| 508 | list_add(&device->list, &devices); |
| 509 | spin_unlock(&devices_lock); |
| 510 | |
| 511 | return; |
| 512 | |
| 513 | out_undo_user_init: |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 514 | if (transport->user->remove != NULL) |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 515 | (*transport->user->remove)(&lp->user); |
| 516 | out_unregister: |
| 517 | platform_device_unregister(&device->pdev); |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 518 | return; /* platform_device_unregister frees dev and device */ |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 519 | out_free_netdev: |
| 520 | free_netdev(dev); |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 521 | out_free_device: |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 522 | kfree(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | } |
| 524 | |
| 525 | static struct uml_net *find_device(int n) |
| 526 | { |
| 527 | struct uml_net *device; |
| 528 | struct list_head *ele; |
| 529 | |
| 530 | spin_lock(&devices_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 531 | list_for_each(ele, &devices) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | device = list_entry(ele, struct uml_net, list); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 533 | if (device->index == n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | goto out; |
| 535 | } |
| 536 | device = NULL; |
| 537 | out: |
| 538 | spin_unlock(&devices_lock); |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 539 | return device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | } |
| 541 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 542 | static int eth_parse(char *str, int *index_out, char **str_out, |
| 543 | char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | { |
| 545 | char *end; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 546 | int n, err = -EINVAL;; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | n = simple_strtoul(str, &end, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 549 | if (end == str) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 550 | *error_out = "Bad device number"; |
| 551 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | str = end; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 555 | if (*str != '=') { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 556 | *error_out = "Expected '=' after device number"; |
| 557 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | str++; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 561 | if (find_device(n)) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 562 | *error_out = "Device already configured"; |
| 563 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 565 | |
| 566 | *index_out = n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | *str_out = str; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 568 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | struct eth_init { |
| 572 | struct list_head list; |
| 573 | char *init; |
| 574 | int index; |
| 575 | }; |
| 576 | |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 577 | static DEFINE_SPINLOCK(transports_lock); |
| 578 | static LIST_HEAD(transports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
| 580 | /* Filled in during early boot */ |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 581 | static LIST_HEAD(eth_cmd_line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | static int check_transport(struct transport *transport, char *eth, int n, |
| 584 | void **init_out, char **mac_out) |
| 585 | { |
| 586 | int len; |
| 587 | |
| 588 | len = strlen(transport->name); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 589 | if (strncmp(eth, transport->name, len)) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 590 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
| 592 | eth += len; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 593 | if (*eth == ',') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | eth++; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 595 | else if (*eth != '\0') |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 596 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
| 598 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 599 | if (*init_out == NULL) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 600 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 602 | if (!transport->setup(eth, mac_out, *init_out)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | kfree(*init_out); |
| 604 | *init_out = NULL; |
| 605 | } |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 606 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | void register_transport(struct transport *new) |
| 610 | { |
| 611 | struct list_head *ele, *next; |
| 612 | struct eth_init *eth; |
| 613 | void *init; |
| 614 | char *mac = NULL; |
| 615 | int match; |
| 616 | |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 617 | spin_lock(&transports_lock); |
| 618 | BUG_ON(!list_empty(&new->list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | list_add(&new->list, &transports); |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 620 | spin_unlock(&transports_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 622 | list_for_each_safe(ele, next, ð_cmd_line) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | eth = list_entry(ele, struct eth_init, list); |
| 624 | match = check_transport(new, eth->init, eth->index, &init, |
| 625 | &mac); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 626 | if (!match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | continue; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 628 | else if (init != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | eth_configure(eth->index, init, mac, new); |
| 630 | kfree(init); |
| 631 | } |
| 632 | list_del(ð->list); |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | static int eth_setup_common(char *str, int index) |
| 637 | { |
| 638 | struct list_head *ele; |
| 639 | struct transport *transport; |
| 640 | void *init; |
| 641 | char *mac = NULL; |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 642 | int found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 644 | spin_lock(&transports_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 645 | list_for_each(ele, &transports) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | transport = list_entry(ele, struct transport, list); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 647 | if (!check_transport(transport, str, index, &init, &mac)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | continue; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 649 | if (init != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | eth_configure(index, init, mac, transport); |
| 651 | kfree(init); |
| 652 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 653 | found = 1; |
| 654 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 656 | |
| 657 | spin_unlock(&transports_lock); |
| 658 | return found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | } |
| 660 | |
Jeff Dike | 97a1fcb | 2007-07-23 18:43:48 -0700 | [diff] [blame] | 661 | static int __init eth_setup(char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | { |
| 663 | struct eth_init *new; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 664 | char *error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | int n, err; |
| 666 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 667 | err = eth_parse(str, &n, &str, &error); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 668 | if (err) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 669 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", |
| 670 | str, error); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 671 | return 1; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 672 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 674 | new = alloc_bootmem(sizeof(*new)); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 675 | if (new == NULL) { |
| 676 | printk(KERN_ERR "eth_init : alloc_bootmem failed\n"); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 677 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | INIT_LIST_HEAD(&new->list); |
| 681 | new->index = n; |
| 682 | new->init = str; |
| 683 | |
| 684 | list_add_tail(&new->list, ð_cmd_line); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 685 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | __setup("eth", eth_setup); |
| 689 | __uml_help(eth_setup, |
| 690 | "eth[0-9]+=<transport>,<options>\n" |
| 691 | " Configure a network device.\n\n" |
| 692 | ); |
| 693 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 694 | static int net_config(char *str, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
| 696 | int n, err; |
| 697 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 698 | err = eth_parse(str, &n, &str, error_out); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 699 | if (err) |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 700 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 702 | /* This string is broken up and the pieces used by the underlying |
| 703 | * driver. So, it is freed only if eth_setup_common fails. |
| 704 | */ |
Jeff Dike | 970d6e3 | 2006-01-06 00:18:48 -0800 | [diff] [blame] | 705 | str = kstrdup(str, GFP_KERNEL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 706 | if (str == NULL) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 707 | *error_out = "net_config failed to strdup string"; |
| 708 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | err = !eth_setup_common(str, n); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 711 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | kfree(str); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 713 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | } |
| 715 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 716 | static int net_id(char **str, int *start_out, int *end_out) |
| 717 | { |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 718 | char *end; |
| 719 | int n; |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 720 | |
| 721 | n = simple_strtoul(*str, &end, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 722 | if ((*end != '\0') || (end == *str)) |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 723 | return -1; |
| 724 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 725 | *start_out = n; |
| 726 | *end_out = n; |
| 727 | *str = end; |
| 728 | return n; |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 729 | } |
| 730 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 731 | static int net_remove(int n, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | { |
| 733 | struct uml_net *device; |
| 734 | struct net_device *dev; |
| 735 | struct uml_net_private *lp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | device = find_device(n); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 738 | if (device == NULL) |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 739 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
| 741 | dev = device->dev; |
| 742 | lp = dev->priv; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 743 | if (lp->fd > 0) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 744 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | unregister_netdev(dev); |
| 746 | platform_device_unregister(&device->pdev); |
| 747 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 748 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | static struct mc_device net_mc = { |
Jeff Dike | 84f48d4 | 2007-02-10 01:44:01 -0800 | [diff] [blame] | 752 | .list = LIST_HEAD_INIT(net_mc.list), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | .name = "eth", |
| 754 | .config = net_config, |
| 755 | .get_config = NULL, |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 756 | .id = net_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | .remove = net_remove, |
| 758 | }; |
| 759 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 760 | #ifdef CONFIG_INET |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, |
| 762 | void *ptr) |
| 763 | { |
| 764 | struct in_ifaddr *ifa = ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | struct net_device *dev = ifa->ifa_dev->dev; |
| 766 | struct uml_net_private *lp; |
| 767 | void (*proc)(unsigned char *, unsigned char *, void *); |
| 768 | unsigned char addr_buf[4], netmask_buf[4]; |
| 769 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 770 | if (dev->open != uml_net_open) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 771 | return NOTIFY_DONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | lp = dev->priv; |
| 774 | |
| 775 | proc = NULL; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 776 | switch (event) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | case NETDEV_UP: |
| 778 | proc = lp->add_address; |
| 779 | break; |
| 780 | case NETDEV_DOWN: |
| 781 | proc = lp->delete_address; |
| 782 | break; |
| 783 | } |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 784 | if (proc != NULL) { |
Bodo Stroesser | 0e76422 | 2005-11-07 00:58:47 -0800 | [diff] [blame] | 785 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
| 786 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | (*proc)(addr_buf, netmask_buf, &lp->user); |
| 788 | } |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 789 | return NOTIFY_DONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
| 791 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 792 | /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | struct notifier_block uml_inetaddr_notifier = { |
| 794 | .notifier_call = uml_inetaddr_event, |
| 795 | }; |
| 796 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 797 | static void inet_register(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | { |
| 799 | struct list_head *ele; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 800 | struct uml_net_private *lp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | struct in_device *ip; |
| 802 | struct in_ifaddr *in; |
| 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | register_inetaddr_notifier(¨_inetaddr_notifier); |
| 805 | |
| 806 | /* Devices may have been opened already, so the uml_inetaddr_notifier |
| 807 | * didn't get a chance to run for them. This fakes it so that |
| 808 | * addresses which have already been set up get handled properly. |
| 809 | */ |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 810 | spin_lock(&opened_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 811 | list_for_each(ele, &opened) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | lp = list_entry(ele, struct uml_net_private, list); |
| 813 | ip = lp->dev->ip_ptr; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 814 | if (ip == NULL) |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 815 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 817 | while (in != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | uml_inetaddr_event(NULL, NETDEV_UP, in); |
| 819 | in = in->ifa_next; |
| 820 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 821 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 822 | spin_unlock(&opened_lock); |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 823 | } |
| 824 | #else |
| 825 | static inline void inet_register(void) |
| 826 | { |
| 827 | } |
| 828 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 830 | static int uml_net_init(void) |
| 831 | { |
| 832 | mconsole_register_dev(&net_mc); |
| 833 | inet_register(); |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 834 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | __initcall(uml_net_init); |
| 838 | |
| 839 | static void close_devices(void) |
| 840 | { |
| 841 | struct list_head *ele; |
| 842 | struct uml_net_private *lp; |
| 843 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 844 | spin_lock(&opened_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 845 | list_for_each(ele, &opened) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | lp = list_entry(ele, struct uml_net_private, list); |
Jeff Dike | 8d93c70 | 2006-01-06 00:19:06 -0800 | [diff] [blame] | 847 | free_irq(lp->dev->irq, lp->dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 848 | if ((lp->close != NULL) && (lp->fd >= 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | (*lp->close)(lp->fd, &lp->user); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 850 | if (lp->remove != NULL) |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 851 | (*lp->remove)(&lp->user); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 853 | spin_unlock(&opened_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | __uml_exitcall(close_devices); |
| 857 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 858 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
| 859 | void *), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | void *arg) |
| 861 | { |
| 862 | struct net_device *dev = d; |
| 863 | struct in_device *ip = dev->ip_ptr; |
| 864 | struct in_ifaddr *in; |
| 865 | unsigned char address[4], netmask[4]; |
| 866 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 867 | if (ip == NULL) return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 869 | while (in != NULL) { |
Bodo Stroesser | 0e76422 | 2005-11-07 00:58:47 -0800 | [diff] [blame] | 870 | memcpy(address, &in->ifa_address, sizeof(address)); |
| 871 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | (*cb)(address, netmask, arg); |
| 873 | in = in->ifa_next; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | int dev_netmask(void *d, void *m) |
| 878 | { |
| 879 | struct net_device *dev = d; |
| 880 | struct in_device *ip = dev->ip_ptr; |
| 881 | struct in_ifaddr *in; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 882 | __be32 *mask_out = m; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 884 | if (ip == NULL) |
| 885 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 888 | if (in == NULL) |
| 889 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | *mask_out = in->ifa_mask; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 892 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | void *get_output_buffer(int *len_out) |
| 896 | { |
| 897 | void *ret; |
| 898 | |
| 899 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 900 | if (ret) *len_out = PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | else *len_out = 0; |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 902 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | void free_output_buffer(void *buffer) |
| 906 | { |
| 907 | free_pages((unsigned long) buffer, 0); |
| 908 | } |
| 909 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 910 | int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | char **gate_addr) |
| 912 | { |
| 913 | char *remain; |
| 914 | |
| 915 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 916 | if (remain != NULL) { |
| 917 | printk(KERN_ERR "tap_setup_common - Extra garbage on " |
| 918 | "specification : '%s'\n", remain); |
| 919 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | } |
| 921 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 922 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | unsigned short eth_protocol(struct sk_buff *skb) |
| 926 | { |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 927 | return eth_type_trans(skb, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |