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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 20 | #include <linux/spinlock.h> |
| 21 | #include "init.h" |
| 22 | #include "irq_kern.h" |
| 23 | #include "irq_user.h" |
| 24 | #include "mconsole_kern.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "net_kern.h" |
| 26 | #include "net_user.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Paolo 'Blaisorblade' Giarrusso | bf61f50 | 2006-09-25 23:33:07 -0700 | [diff] [blame] | 28 | static inline void set_ether_mac(struct net_device *dev, unsigned char *addr) |
| 29 | { |
| 30 | memcpy(dev->dev_addr, addr, ETH_ALEN); |
| 31 | } |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define DRIVER_NAME "uml-netdev" |
| 34 | |
| 35 | static DEFINE_SPINLOCK(opened_lock); |
Jeff Dike | 9010772 | 2006-01-06 00:18:54 -0800 | [diff] [blame] | 36 | static LIST_HEAD(opened); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 38 | /* |
| 39 | * The drop_skb is used when we can't allocate an skb. The |
| 40 | * packet is read into drop_skb in order to get the data off the |
| 41 | * connection to the host. |
| 42 | * It is reallocated whenever a maximum packet size is seen which is |
| 43 | * larger than any seen before. update_drop_skb is called from |
| 44 | * eth_configure when a new interface is added. |
| 45 | */ |
| 46 | static DEFINE_SPINLOCK(drop_lock); |
| 47 | static struct sk_buff *drop_skb; |
| 48 | static int drop_max; |
| 49 | |
| 50 | static int update_drop_skb(int max) |
| 51 | { |
| 52 | struct sk_buff *new; |
| 53 | unsigned long flags; |
| 54 | int err = 0; |
| 55 | |
| 56 | spin_lock_irqsave(&drop_lock, flags); |
| 57 | |
| 58 | if (max <= drop_max) |
| 59 | goto out; |
| 60 | |
| 61 | err = -ENOMEM; |
| 62 | new = dev_alloc_skb(max); |
| 63 | if (new == NULL) |
| 64 | goto out; |
| 65 | |
| 66 | skb_put(new, max); |
| 67 | |
| 68 | kfree_skb(drop_skb); |
| 69 | drop_skb = new; |
| 70 | drop_max = max; |
| 71 | err = 0; |
| 72 | out: |
| 73 | spin_unlock_irqrestore(&drop_lock, flags); |
| 74 | |
| 75 | return err; |
| 76 | } |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static int uml_net_rx(struct net_device *dev) |
| 79 | { |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 80 | struct uml_net_private *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | int pkt_len; |
| 82 | struct sk_buff *skb; |
| 83 | |
| 84 | /* If we can't allocate memory, try again next round. */ |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 85 | skb = dev_alloc_skb(lp->max_packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (skb == NULL) { |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 87 | drop_skb->dev = dev; |
| 88 | /* Read a packet into drop_skb and don't do anything with it. */ |
| 89 | (*lp->read)(lp->fd, drop_skb, lp); |
Stephen Hemminger | cfa8707 | 2009-03-26 15:11:16 +0000 | [diff] [blame] | 90 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | skb->dev = dev; |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 95 | skb_put(skb, lp->max_packet); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 96 | skb_reset_mac_header(skb); |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 97 | pkt_len = (*lp->read)(lp->fd, skb, lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | if (pkt_len > 0) { |
| 100 | skb_trim(skb, pkt_len); |
| 101 | skb->protocol = (*lp->protocol)(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Stephen Hemminger | cfa8707 | 2009-03-26 15:11:16 +0000 | [diff] [blame] | 103 | dev->stats.rx_bytes += skb->len; |
| 104 | dev->stats.rx_packets++; |
Julia Lawall | 505a41d | 2007-12-10 17:14:46 -0800 | [diff] [blame] | 105 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return pkt_len; |
| 107 | } |
| 108 | |
| 109 | kfree_skb(skb); |
| 110 | return pkt_len; |
| 111 | } |
| 112 | |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 113 | static void uml_dev_close(struct work_struct *work) |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 114 | { |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 115 | struct uml_net_private *lp = |
| 116 | container_of(work, struct uml_net_private, work); |
| 117 | dev_close(lp->dev); |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 118 | } |
| 119 | |
WANG Cong | 074a0db | 2008-04-28 02:13:57 -0700 | [diff] [blame] | 120 | static irqreturn_t uml_net_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | { |
| 122 | struct net_device *dev = dev_id; |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 123 | struct uml_net_private *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | int err; |
| 125 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 126 | if (!netif_running(dev)) |
| 127 | return IRQ_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | spin_lock(&lp->lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 130 | while ((err = uml_net_rx(dev)) > 0) ; |
| 131 | if (err < 0) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 132 | printk(KERN_ERR |
| 133 | "Device '%s' read returned %d, shutting it down\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | dev->name, err); |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 135 | /* dev_close can't be called in interrupt context, and takes |
| 136 | * again lp->lock. |
| 137 | * And dev_close() can be safely called multiple times on the |
| 138 | * same device, since it tests for (dev->flags & IFF_UP). So |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 139 | * there's no harm in delaying the device shutdown. |
| 140 | * Furthermore, the workqueue will not re-enqueue an already |
| 141 | * enqueued work item. */ |
| 142 | schedule_work(&lp->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | goto out; |
| 144 | } |
| 145 | reactivate_fd(lp->fd, UM_ETH_IRQ); |
| 146 | |
Paolo 'Blaisorblade' Giarrusso | 71c8d4c | 2006-01-18 17:42:56 -0800 | [diff] [blame] | 147 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | spin_unlock(&lp->lock); |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 149 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static int uml_net_open(struct net_device *dev) |
| 153 | { |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 154 | struct uml_net_private *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | int err; |
| 156 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 157 | if (lp->fd >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | err = -ENXIO; |
| 159 | goto out; |
| 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | lp->fd = (*lp->open)(&lp->user); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 163 | if (lp->fd < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | err = lp->fd; |
| 165 | goto out; |
| 166 | } |
| 167 | |
| 168 | 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] | 169 | IRQF_DISABLED | IRQF_SHARED, dev->name, dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 170 | if (err != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | 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] | 172 | err = -ENETUNREACH; |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 173 | goto out_close; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | lp->tl.data = (unsigned long) &lp->user; |
| 177 | netif_start_queue(dev); |
| 178 | |
| 179 | /* clear buffer - it can happen that the host side of the interface |
| 180 | * is full when we get here. In this case, new data is never queued, |
| 181 | * SIGIOs never arrive, and the net never works. |
| 182 | */ |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 183 | while ((err = uml_net_rx(dev)) > 0) ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 185 | spin_lock(&opened_lock); |
| 186 | list_add(&lp->list, &opened); |
| 187 | spin_unlock(&opened_lock); |
| 188 | |
| 189 | return 0; |
| 190 | out_close: |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 191 | if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user); |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 192 | lp->fd = -1; |
| 193 | out: |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 194 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static int uml_net_close(struct net_device *dev) |
| 198 | { |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 199 | struct uml_net_private *lp = netdev_priv(dev); |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | netif_stop_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | free_irq(dev->irq, dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 204 | if (lp->close != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | (*lp->close)(lp->fd, &lp->user); |
| 206 | lp->fd = -1; |
| 207 | |
Jeff Dike | 14d9ead | 2006-02-07 12:58:42 -0800 | [diff] [blame] | 208 | spin_lock(&opened_lock); |
| 209 | list_del(&lp->list); |
| 210 | spin_unlock(&opened_lock); |
| 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 216 | { |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 217 | struct uml_net_private *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | unsigned long flags; |
| 219 | int len; |
| 220 | |
| 221 | netif_stop_queue(dev); |
| 222 | |
| 223 | spin_lock_irqsave(&lp->lock, flags); |
| 224 | |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 225 | len = (*lp->write)(lp->fd, skb, lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 227 | if (len == skb->len) { |
Stephen Hemminger | cfa8707 | 2009-03-26 15:11:16 +0000 | [diff] [blame] | 228 | dev->stats.tx_packets++; |
| 229 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | dev->trans_start = jiffies; |
| 231 | netif_start_queue(dev); |
| 232 | |
| 233 | /* this is normally done in the interrupt when tx finishes */ |
| 234 | netif_wake_queue(dev); |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 235 | } |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 236 | else if (len == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | netif_start_queue(dev); |
Stephen Hemminger | cfa8707 | 2009-03-26 15:11:16 +0000 | [diff] [blame] | 238 | dev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
| 240 | else { |
| 241 | netif_start_queue(dev); |
| 242 | printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len); |
| 243 | } |
| 244 | |
| 245 | spin_unlock_irqrestore(&lp->lock, flags); |
| 246 | |
| 247 | dev_kfree_skb(skb); |
| 248 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 249 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | static void uml_net_set_multicast_list(struct net_device *dev) |
| 253 | { |
Patrick McHardy | f70c176 | 2008-03-26 00:16:29 -0700 | [diff] [blame] | 254 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static void uml_net_tx_timeout(struct net_device *dev) |
| 258 | { |
| 259 | dev->trans_start = jiffies; |
| 260 | netif_wake_queue(dev); |
| 261 | } |
| 262 | |
| 263 | static int uml_net_set_mac(struct net_device *dev, void *addr) |
| 264 | { |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 265 | struct uml_net_private *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | struct sockaddr *hwaddr = addr; |
| 267 | |
Paolo 'Blaisorblade' Giarrusso | 48af05e | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 268 | spin_lock_irq(&lp->lock); |
Paolo 'Blaisorblade' Giarrusso | bf61f50 | 2006-09-25 23:33:07 -0700 | [diff] [blame] | 269 | set_ether_mac(dev, hwaddr->sa_data); |
Paolo 'Blaisorblade' Giarrusso | 48af05e | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 270 | spin_unlock_irq(&lp->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 272 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static int uml_net_change_mtu(struct net_device *dev, int new_mtu) |
| 276 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | dev->mtu = new_mtu; |
| 278 | |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 279 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 282 | static void uml_net_get_drvinfo(struct net_device *dev, |
| 283 | struct ethtool_drvinfo *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | { |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 285 | strcpy(info->driver, DRIVER_NAME); |
| 286 | strcpy(info->version, "42"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Stephen Hemminger | 0fc0b73 | 2009-09-02 01:03:33 -0700 | [diff] [blame] | 289 | static const struct ethtool_ops uml_net_ethtool_ops = { |
Christoph Hellwig | 6d38748 | 2005-11-07 06:21:21 +0100 | [diff] [blame] | 290 | .get_drvinfo = uml_net_get_drvinfo, |
| 291 | .get_link = ethtool_op_get_link, |
| 292 | }; |
| 293 | |
WANG Cong | 074a0db | 2008-04-28 02:13:57 -0700 | [diff] [blame] | 294 | static void uml_net_user_timer_expire(unsigned long _conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
| 296 | #ifdef undef |
| 297 | struct connection *conn = (struct connection *)_conn; |
| 298 | |
| 299 | dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn); |
| 300 | do_connect(conn); |
| 301 | #endif |
| 302 | } |
| 303 | |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 304 | static void setup_etheraddr(char *str, unsigned char *addr, char *name) |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 305 | { |
| 306 | char *end; |
| 307 | int i; |
| 308 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 309 | if (str == NULL) |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 310 | goto random; |
| 311 | |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 312 | for (i = 0; i < 6; i++) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 313 | addr[i] = simple_strtoul(str, &end, 16); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 314 | if ((end == str) || |
| 315 | ((*end != ':') && (*end != ',') && (*end != '\0'))) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 316 | printk(KERN_ERR |
| 317 | "setup_etheraddr: failed to parse '%s' " |
| 318 | "as an ethernet address\n", str); |
| 319 | goto random; |
| 320 | } |
| 321 | str = end + 1; |
| 322 | } |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 323 | if (is_multicast_ether_addr(addr)) { |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 324 | printk(KERN_ERR |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 325 | "Attempt to assign a multicast ethernet address to a " |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 326 | "device disallowed\n"); |
| 327 | goto random; |
| 328 | } |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 329 | if (!is_valid_ether_addr(addr)) { |
| 330 | printk(KERN_ERR |
| 331 | "Attempt to assign an invalid ethernet address to a " |
| 332 | "device disallowed\n"); |
| 333 | goto random; |
| 334 | } |
| 335 | if (!is_local_ether_addr(addr)) { |
| 336 | printk(KERN_WARNING |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 337 | "Warning: Assigning a globally valid ethernet " |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 338 | "address to a device\n"); |
Jeff Dike | 2278c5a | 2008-02-04 22:31:25 -0800 | [diff] [blame] | 339 | printk(KERN_WARNING "You should set the 2nd rightmost bit in " |
| 340 | "the first byte of the MAC,\n"); |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 341 | printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 342 | addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4], |
| 343 | addr[5]); |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 344 | } |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 345 | return; |
| 346 | |
| 347 | random: |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 348 | printk(KERN_INFO |
| 349 | "Choosing a random ethernet address for device %s\n", name); |
Ollie Wild | d6c6410 | 2006-09-29 15:50:28 -0700 | [diff] [blame] | 350 | random_ether_addr(addr); |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | static DEFINE_SPINLOCK(devices_lock); |
Jeff Dike | 9010772 | 2006-01-06 00:18:54 -0800 | [diff] [blame] | 354 | static LIST_HEAD(devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 356 | static struct platform_driver uml_net_driver = { |
| 357 | .driver = { |
| 358 | .name = DRIVER_NAME, |
| 359 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 362 | static void net_device_release(struct device *dev) |
| 363 | { |
Greg Kroah-Hartman | 8691b97 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 364 | struct uml_net *device = dev_get_drvdata(dev); |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 365 | struct net_device *netdev = device->dev; |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 366 | struct uml_net_private *lp = netdev_priv(netdev); |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 367 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 368 | if (lp->remove != NULL) |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 369 | (*lp->remove)(&lp->user); |
| 370 | list_del(&device->list); |
| 371 | kfree(device); |
| 372 | free_netdev(netdev); |
| 373 | } |
| 374 | |
Stephen Hemminger | 8bb95b3 | 2009-03-26 15:11:17 +0000 | [diff] [blame] | 375 | static const struct net_device_ops uml_netdev_ops = { |
| 376 | .ndo_open = uml_net_open, |
| 377 | .ndo_stop = uml_net_close, |
| 378 | .ndo_start_xmit = uml_net_start_xmit, |
| 379 | .ndo_set_multicast_list = uml_net_set_multicast_list, |
| 380 | .ndo_tx_timeout = uml_net_tx_timeout, |
| 381 | .ndo_set_mac_address = uml_net_set_mac, |
| 382 | .ndo_change_mtu = uml_net_change_mtu, |
| 383 | .ndo_set_mac_address = eth_mac_addr, |
| 384 | .ndo_validate_addr = eth_validate_addr, |
| 385 | }; |
| 386 | |
Jeff Dike | 80e3931 | 2008-02-04 22:31:17 -0800 | [diff] [blame] | 387 | /* |
| 388 | * Ensures that platform_driver_register is called only once by |
| 389 | * eth_configure. Will be set in an initcall. |
| 390 | */ |
| 391 | static int driver_registered; |
| 392 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 393 | static void eth_configure(int n, void *init, char *mac, |
| 394 | struct transport *transport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
| 396 | struct uml_net *device; |
| 397 | struct net_device *dev; |
| 398 | struct uml_net_private *lp; |
Paolo 'Blaisorblade' Giarrusso | c74c69b4 | 2007-05-06 14:51:15 -0700 | [diff] [blame] | 399 | int err, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Paolo 'Blaisorblade' Giarrusso | c74c69b4 | 2007-05-06 14:51:15 -0700 | [diff] [blame] | 401 | size = transport->private_size + sizeof(struct uml_net_private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Yan Burman | 0268bd0 | 2006-12-12 19:54:52 +0100 | [diff] [blame] | 403 | device = kzalloc(sizeof(*device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (device == NULL) { |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 405 | printk(KERN_ERR "eth_configure failed to allocate struct " |
| 406 | "uml_net\n"); |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 407 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 410 | dev = alloc_etherdev(size); |
| 411 | if (dev == NULL) { |
| 412 | printk(KERN_ERR "eth_configure: failed to allocate struct " |
| 413 | "net_device for eth%d\n", n); |
| 414 | goto out_free_device; |
| 415 | } |
| 416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | INIT_LIST_HEAD(&device->list); |
| 418 | device->index = n; |
| 419 | |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 420 | /* If this name ends up conflicting with an existing registered |
| 421 | * netdevice, that is OK, register_netdev{,ice}() will notice this |
| 422 | * and fail. |
| 423 | */ |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 424 | snprintf(dev->name, sizeof(dev->name), "eth%d", n); |
Paolo 'Blaisorblade' Giarrusso | e024715 | 2007-05-06 14:51:13 -0700 | [diff] [blame] | 425 | |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 426 | setup_etheraddr(mac, device->mac, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Johannes Berg | 7c510e4 | 2008-10-27 17:47:26 -0700 | [diff] [blame] | 428 | printk(KERN_INFO "Netdevice %d (%pM) : ", n, device->mac); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 430 | lp = netdev_priv(dev); |
Paolo 'Blaisorblade' Giarrusso | e56a788 | 2006-01-18 17:42:55 -0800 | [diff] [blame] | 431 | /* This points to the transport private data. It's still clear, but we |
| 432 | * must memset it to 0 *now*. Let's help the drivers. */ |
| 433 | memset(lp, 0, size); |
Peter Zijlstra | eff3b63 | 2006-12-13 00:33:50 -0800 | [diff] [blame] | 434 | INIT_WORK(&lp->work, uml_dev_close); |
Paolo 'Blaisorblade' Giarrusso | e56a788 | 2006-01-18 17:42:55 -0800 | [diff] [blame] | 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | /* sysfs register */ |
| 437 | if (!driver_registered) { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 438 | platform_driver_register(¨_net_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | driver_registered = 1; |
| 440 | } |
| 441 | device->pdev.id = n; |
| 442 | device->pdev.name = DRIVER_NAME; |
Jeff Dike | 2e3f525 | 2007-05-06 14:51:29 -0700 | [diff] [blame] | 443 | device->pdev.dev.release = net_device_release; |
Greg Kroah-Hartman | 8691b97 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 444 | dev_set_drvdata(&device->pdev.dev, device); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 445 | if (platform_device_register(&device->pdev)) |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 446 | goto out_free_netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | SET_NETDEV_DEV(dev,&device->pdev.dev); |
| 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | device->dev = dev; |
| 450 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 451 | /* |
| 452 | * These just fill in a data structure, so there's no failure |
| 453 | * to be worried about. |
| 454 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | (*transport->kern->init)(dev, init); |
| 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | *lp = ((struct uml_net_private) |
| 458 | { .list = LIST_HEAD_INIT(lp->list), |
| 459 | .dev = dev, |
| 460 | .fd = -1, |
| 461 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0}, |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 462 | .max_packet = transport->user->max_packet, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | .protocol = transport->kern->protocol, |
| 464 | .open = transport->user->open, |
| 465 | .close = transport->user->close, |
| 466 | .remove = transport->user->remove, |
| 467 | .read = transport->kern->read, |
| 468 | .write = transport->kern->write, |
| 469 | .add_address = transport->user->add_address, |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 470 | .delete_address = transport->user->delete_address }); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
| 472 | init_timer(&lp->tl); |
| 473 | spin_lock_init(&lp->lock); |
| 474 | lp->tl.function = uml_net_user_timer_expire; |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 475 | memcpy(lp->mac, device->mac, sizeof(lp->mac)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 477 | if ((transport->user->init != NULL) && |
| 478 | ((*transport->user->init)(&lp->user, dev) != 0)) |
| 479 | goto out_unregister; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Jeff Dike | b10aeee | 2006-09-29 01:58:50 -0700 | [diff] [blame] | 481 | set_ether_mac(dev, device->mac); |
Jeff Dike | b53f35a | 2007-10-16 01:27:31 -0700 | [diff] [blame] | 482 | dev->mtu = transport->user->mtu; |
Stephen Hemminger | 8bb95b3 | 2009-03-26 15:11:17 +0000 | [diff] [blame] | 483 | dev->netdev_ops = ¨_netdev_ops; |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 484 | dev->ethtool_ops = ¨_net_ethtool_ops; |
| 485 | dev->watchdog_timeo = (HZ >> 1); |
| 486 | dev->irq = UM_ETH_IRQ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Jeff Dike | 605c1e5 | 2007-10-16 01:27:32 -0700 | [diff] [blame] | 488 | err = update_drop_skb(lp->max_packet); |
| 489 | if (err) |
| 490 | goto out_undo_user_init; |
| 491 | |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 492 | rtnl_lock(); |
| 493 | err = register_netdevice(dev); |
| 494 | rtnl_unlock(); |
| 495 | if (err) |
| 496 | goto out_undo_user_init; |
| 497 | |
| 498 | spin_lock(&devices_lock); |
| 499 | list_add(&device->list, &devices); |
| 500 | spin_unlock(&devices_lock); |
| 501 | |
| 502 | return; |
| 503 | |
| 504 | out_undo_user_init: |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 505 | if (transport->user->remove != NULL) |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 506 | (*transport->user->remove)(&lp->user); |
| 507 | out_unregister: |
| 508 | platform_device_unregister(&device->pdev); |
Jeff Dike | 7d98230 | 2007-05-08 00:35:04 -0700 | [diff] [blame] | 509 | return; /* platform_device_unregister frees dev and device */ |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 510 | out_free_netdev: |
| 511 | free_netdev(dev); |
Paolo 'Blaisorblade' Giarrusso | 8c84083 | 2007-05-06 14:51:14 -0700 | [diff] [blame] | 512 | out_free_device: |
Jeff Dike | f34d9d2 | 2007-05-06 14:51:04 -0700 | [diff] [blame] | 513 | kfree(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | static struct uml_net *find_device(int n) |
| 517 | { |
| 518 | struct uml_net *device; |
| 519 | struct list_head *ele; |
| 520 | |
| 521 | spin_lock(&devices_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 522 | list_for_each(ele, &devices) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | device = list_entry(ele, struct uml_net, list); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 524 | if (device->index == n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | goto out; |
| 526 | } |
| 527 | device = NULL; |
| 528 | out: |
| 529 | spin_unlock(&devices_lock); |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 530 | return device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 533 | static int eth_parse(char *str, int *index_out, char **str_out, |
| 534 | char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | { |
| 536 | char *end; |
Joe Perches | a419aef | 2009-08-18 11:18:35 -0700 | [diff] [blame] | 537 | int n, err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
| 539 | n = simple_strtoul(str, &end, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 540 | if (end == str) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 541 | *error_out = "Bad device number"; |
| 542 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | str = end; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 546 | if (*str != '=') { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 547 | *error_out = "Expected '=' after device number"; |
| 548 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | str++; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 552 | if (find_device(n)) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 553 | *error_out = "Device already configured"; |
| 554 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 556 | |
| 557 | *index_out = n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | *str_out = str; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 559 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | struct eth_init { |
| 563 | struct list_head list; |
| 564 | char *init; |
| 565 | int index; |
| 566 | }; |
| 567 | |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 568 | static DEFINE_SPINLOCK(transports_lock); |
| 569 | static LIST_HEAD(transports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | /* Filled in during early boot */ |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 572 | static LIST_HEAD(eth_cmd_line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | static int check_transport(struct transport *transport, char *eth, int n, |
| 575 | void **init_out, char **mac_out) |
| 576 | { |
| 577 | int len; |
| 578 | |
| 579 | len = strlen(transport->name); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 580 | if (strncmp(eth, transport->name, len)) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 581 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | eth += len; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 584 | if (*eth == ',') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | eth++; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 586 | else if (*eth != '\0') |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 587 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
| 589 | *init_out = kmalloc(transport->setup_size, GFP_KERNEL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 590 | if (*init_out == NULL) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 591 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 593 | if (!transport->setup(eth, mac_out, *init_out)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | kfree(*init_out); |
| 595 | *init_out = NULL; |
| 596 | } |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 597 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | void register_transport(struct transport *new) |
| 601 | { |
| 602 | struct list_head *ele, *next; |
| 603 | struct eth_init *eth; |
| 604 | void *init; |
| 605 | char *mac = NULL; |
| 606 | int match; |
| 607 | |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 608 | spin_lock(&transports_lock); |
| 609 | BUG_ON(!list_empty(&new->list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | list_add(&new->list, &transports); |
Jeff Dike | d3b7f69 | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 611 | spin_unlock(&transports_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 613 | list_for_each_safe(ele, next, ð_cmd_line) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | eth = list_entry(ele, struct eth_init, list); |
| 615 | match = check_transport(new, eth->init, eth->index, &init, |
| 616 | &mac); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 617 | if (!match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | continue; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 619 | else if (init != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | eth_configure(eth->index, init, mac, new); |
| 621 | kfree(init); |
| 622 | } |
| 623 | list_del(ð->list); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | static int eth_setup_common(char *str, int index) |
| 628 | { |
| 629 | struct list_head *ele; |
| 630 | struct transport *transport; |
| 631 | void *init; |
| 632 | char *mac = NULL; |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 633 | int found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 635 | spin_lock(&transports_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 636 | list_for_each(ele, &transports) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | transport = list_entry(ele, struct transport, list); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 638 | if (!check_transport(transport, str, index, &init, &mac)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | continue; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 640 | if (init != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | eth_configure(index, init, mac, transport); |
| 642 | kfree(init); |
| 643 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 644 | found = 1; |
| 645 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 647 | |
| 648 | spin_unlock(&transports_lock); |
| 649 | return found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
| 651 | |
Jeff Dike | 97a1fcb | 2007-07-23 18:43:48 -0700 | [diff] [blame] | 652 | static int __init eth_setup(char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | { |
| 654 | struct eth_init *new; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 655 | char *error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | int n, err; |
| 657 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 658 | err = eth_parse(str, &n, &str, &error); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 659 | if (err) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 660 | printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n", |
| 661 | str, error); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 662 | return 1; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 663 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 665 | new = alloc_bootmem(sizeof(*new)); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 666 | if (new == NULL) { |
| 667 | printk(KERN_ERR "eth_init : alloc_bootmem failed\n"); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 668 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | INIT_LIST_HEAD(&new->list); |
| 672 | new->index = n; |
| 673 | new->init = str; |
| 674 | |
| 675 | list_add_tail(&new->list, ð_cmd_line); |
Jeff Dike | 1183dc9 | 2006-09-27 01:50:43 -0700 | [diff] [blame] | 676 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | __setup("eth", eth_setup); |
| 680 | __uml_help(eth_setup, |
| 681 | "eth[0-9]+=<transport>,<options>\n" |
| 682 | " Configure a network device.\n\n" |
| 683 | ); |
| 684 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 685 | static int net_config(char *str, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | { |
| 687 | int n, err; |
| 688 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 689 | err = eth_parse(str, &n, &str, error_out); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 690 | if (err) |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 691 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 693 | /* This string is broken up and the pieces used by the underlying |
| 694 | * driver. So, it is freed only if eth_setup_common fails. |
| 695 | */ |
Jeff Dike | 970d6e3 | 2006-01-06 00:18:48 -0800 | [diff] [blame] | 696 | str = kstrdup(str, GFP_KERNEL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 697 | if (str == NULL) { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 698 | *error_out = "net_config failed to strdup string"; |
| 699 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | } |
| 701 | err = !eth_setup_common(str, n); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 702 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | kfree(str); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 704 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | } |
| 706 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 707 | static int net_id(char **str, int *start_out, int *end_out) |
| 708 | { |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 709 | char *end; |
| 710 | int n; |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 711 | |
| 712 | n = simple_strtoul(*str, &end, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 713 | if ((*end != '\0') || (end == *str)) |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 714 | return -1; |
| 715 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 716 | *start_out = n; |
| 717 | *end_out = n; |
| 718 | *str = end; |
| 719 | return n; |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 720 | } |
| 721 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 722 | static int net_remove(int n, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | { |
| 724 | struct uml_net *device; |
| 725 | struct net_device *dev; |
| 726 | struct uml_net_private *lp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | device = find_device(n); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 729 | if (device == NULL) |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 730 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | dev = device->dev; |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 733 | lp = netdev_priv(dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 734 | if (lp->fd > 0) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 735 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | unregister_netdev(dev); |
| 737 | platform_device_unregister(&device->pdev); |
| 738 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 739 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | static struct mc_device net_mc = { |
Jeff Dike | 84f48d4 | 2007-02-10 01:44:01 -0800 | [diff] [blame] | 743 | .list = LIST_HEAD_INIT(net_mc.list), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | .name = "eth", |
| 745 | .config = net_config, |
| 746 | .get_config = NULL, |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 747 | .id = net_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | .remove = net_remove, |
| 749 | }; |
| 750 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 751 | #ifdef CONFIG_INET |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, |
| 753 | void *ptr) |
| 754 | { |
| 755 | struct in_ifaddr *ifa = ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | struct net_device *dev = ifa->ifa_dev->dev; |
| 757 | struct uml_net_private *lp; |
| 758 | void (*proc)(unsigned char *, unsigned char *, void *); |
| 759 | unsigned char addr_buf[4], netmask_buf[4]; |
| 760 | |
Miklos Szeredi | ebe28bb | 2009-04-02 16:56:49 -0700 | [diff] [blame] | 761 | if (dev->netdev_ops->ndo_open != uml_net_open) |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 762 | return NOTIFY_DONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
Wang Chen | 17c324f | 2008-12-04 15:07:33 -0800 | [diff] [blame] | 764 | lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | proc = NULL; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 767 | switch (event) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | case NETDEV_UP: |
| 769 | proc = lp->add_address; |
| 770 | break; |
| 771 | case NETDEV_DOWN: |
| 772 | proc = lp->delete_address; |
| 773 | break; |
| 774 | } |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 775 | if (proc != NULL) { |
Bodo Stroesser | 0e76422 | 2005-11-07 00:58:47 -0800 | [diff] [blame] | 776 | memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); |
| 777 | memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | (*proc)(addr_buf, netmask_buf, &lp->user); |
| 779 | } |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 780 | return NOTIFY_DONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 783 | /* uml_net_init shouldn't be called twice on two CPUs at the same time */ |
WANG Cong | 074a0db | 2008-04-28 02:13:57 -0700 | [diff] [blame] | 784 | static struct notifier_block uml_inetaddr_notifier = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | .notifier_call = uml_inetaddr_event, |
| 786 | }; |
| 787 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 788 | static void inet_register(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
| 790 | struct list_head *ele; |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 791 | struct uml_net_private *lp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | struct in_device *ip; |
| 793 | struct in_ifaddr *in; |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | register_inetaddr_notifier(¨_inetaddr_notifier); |
| 796 | |
| 797 | /* Devices may have been opened already, so the uml_inetaddr_notifier |
| 798 | * didn't get a chance to run for them. This fakes it so that |
| 799 | * addresses which have already been set up get handled properly. |
| 800 | */ |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 801 | spin_lock(&opened_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 802 | list_for_each(ele, &opened) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | lp = list_entry(ele, struct uml_net_private, list); |
| 804 | ip = lp->dev->ip_ptr; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 805 | if (ip == NULL) |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 806 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 808 | while (in != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | uml_inetaddr_event(NULL, NETDEV_UP, in); |
| 810 | in = in->ifa_next; |
| 811 | } |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 812 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 813 | spin_unlock(&opened_lock); |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 814 | } |
| 815 | #else |
| 816 | static inline void inet_register(void) |
| 817 | { |
| 818 | } |
| 819 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Jeff Dike | 32f862c | 2007-11-14 17:00:28 -0800 | [diff] [blame] | 821 | static int uml_net_init(void) |
| 822 | { |
| 823 | mconsole_register_dev(&net_mc); |
| 824 | inet_register(); |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 825 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | __initcall(uml_net_init); |
| 829 | |
| 830 | static void close_devices(void) |
| 831 | { |
| 832 | struct list_head *ele; |
| 833 | struct uml_net_private *lp; |
| 834 | |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 835 | spin_lock(&opened_lock); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 836 | list_for_each(ele, &opened) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | lp = list_entry(ele, struct uml_net_private, list); |
Jeff Dike | 8d93c70 | 2006-01-06 00:19:06 -0800 | [diff] [blame] | 838 | free_irq(lp->dev->irq, lp->dev); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 839 | if ((lp->close != NULL) && (lp->fd >= 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | (*lp->close)(lp->fd, &lp->user); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 841 | if (lp->remove != NULL) |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 842 | (*lp->remove)(&lp->user); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
Jeff Dike | c862fc3 | 2007-02-10 01:44:04 -0800 | [diff] [blame] | 844 | spin_unlock(&opened_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | __uml_exitcall(close_devices); |
| 848 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 849 | void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, |
| 850 | void *), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | void *arg) |
| 852 | { |
| 853 | struct net_device *dev = d; |
| 854 | struct in_device *ip = dev->ip_ptr; |
| 855 | struct in_ifaddr *in; |
| 856 | unsigned char address[4], netmask[4]; |
| 857 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 858 | if (ip == NULL) return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 860 | while (in != NULL) { |
Bodo Stroesser | 0e76422 | 2005-11-07 00:58:47 -0800 | [diff] [blame] | 861 | memcpy(address, &in->ifa_address, sizeof(address)); |
| 862 | memcpy(netmask, &in->ifa_mask, sizeof(netmask)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | (*cb)(address, netmask, arg); |
| 864 | in = in->ifa_next; |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | int dev_netmask(void *d, void *m) |
| 869 | { |
| 870 | struct net_device *dev = d; |
| 871 | struct in_device *ip = dev->ip_ptr; |
| 872 | struct in_ifaddr *in; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 873 | __be32 *mask_out = m; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 875 | if (ip == NULL) |
| 876 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | |
| 878 | in = ip->ifa_list; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 879 | if (in == NULL) |
| 880 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
| 882 | *mask_out = in->ifa_mask; |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 883 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | void *get_output_buffer(int *len_out) |
| 887 | { |
| 888 | void *ret; |
| 889 | |
| 890 | ret = (void *) __get_free_pages(GFP_KERNEL, 0); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 891 | if (ret) *len_out = PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | else *len_out = 0; |
Jeff Dike | 4ea21cd | 2007-02-10 01:43:56 -0800 | [diff] [blame] | 893 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | void free_output_buffer(void *buffer) |
| 897 | { |
| 898 | free_pages((unsigned long) buffer, 0); |
| 899 | } |
| 900 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 901 | 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] | 902 | char **gate_addr) |
| 903 | { |
| 904 | char *remain; |
| 905 | |
| 906 | remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL); |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 907 | if (remain != NULL) { |
| 908 | printk(KERN_ERR "tap_setup_common - Extra garbage on " |
| 909 | "specification : '%s'\n", remain); |
| 910 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | } |
| 912 | |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 913 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | |
| 916 | unsigned short eth_protocol(struct sk_buff *skb) |
| 917 | { |
Jeff Dike | cd1ae0e | 2007-10-16 01:27:29 -0700 | [diff] [blame] | 918 | return eth_type_trans(skb, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |