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https://github.com/torvalds/linux.git
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bd6aa6502e
Use the new IRQF_ constants and remove the SA_INTERRUPT define Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
895 lines
19 KiB
C
895 lines
19 KiB
C
/*
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* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
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* James Leu (jleu@mindspring.net).
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* Copyright (C) 2001 by various other people who didn't put their name here.
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* Licensed under the GPL.
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*/
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#include "linux/config.h"
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#include "linux/kernel.h"
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#include "linux/netdevice.h"
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#include "linux/rtnetlink.h"
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#include "linux/skbuff.h"
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#include "linux/socket.h"
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#include "linux/spinlock.h"
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#include "linux/module.h"
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#include "linux/init.h"
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#include "linux/etherdevice.h"
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#include "linux/list.h"
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#include "linux/inetdevice.h"
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#include "linux/ctype.h"
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#include "linux/bootmem.h"
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#include "linux/ethtool.h"
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#include "linux/platform_device.h"
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#include "asm/uaccess.h"
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#include "user_util.h"
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#include "kern_util.h"
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#include "net_kern.h"
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#include "net_user.h"
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#include "mconsole_kern.h"
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#include "init.h"
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#include "irq_user.h"
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#include "irq_kern.h"
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#define DRIVER_NAME "uml-netdev"
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static DEFINE_SPINLOCK(opened_lock);
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static LIST_HEAD(opened);
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static int uml_net_rx(struct net_device *dev)
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{
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struct uml_net_private *lp = dev->priv;
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int pkt_len;
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struct sk_buff *skb;
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/* If we can't allocate memory, try again next round. */
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skb = dev_alloc_skb(dev->mtu);
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if (skb == NULL) {
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lp->stats.rx_dropped++;
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return 0;
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}
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skb->dev = dev;
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skb_put(skb, dev->mtu);
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skb->mac.raw = skb->data;
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pkt_len = (*lp->read)(lp->fd, &skb, lp);
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if (pkt_len > 0) {
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skb_trim(skb, pkt_len);
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skb->protocol = (*lp->protocol)(skb);
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netif_rx(skb);
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lp->stats.rx_bytes += skb->len;
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lp->stats.rx_packets++;
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return pkt_len;
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}
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kfree_skb(skb);
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return pkt_len;
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}
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static void uml_dev_close(void* dev)
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{
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dev_close( (struct net_device *) dev);
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}
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irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct net_device *dev = dev_id;
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struct uml_net_private *lp = dev->priv;
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int err;
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if(!netif_running(dev))
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return(IRQ_NONE);
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spin_lock(&lp->lock);
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while((err = uml_net_rx(dev)) > 0) ;
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if(err < 0) {
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DECLARE_WORK(close_work, uml_dev_close, dev);
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printk(KERN_ERR
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"Device '%s' read returned %d, shutting it down\n",
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dev->name, err);
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/* dev_close can't be called in interrupt context, and takes
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* again lp->lock.
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* And dev_close() can be safely called multiple times on the
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* same device, since it tests for (dev->flags & IFF_UP). So
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* there's no harm in delaying the device shutdown. */
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schedule_work(&close_work);
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goto out;
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}
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reactivate_fd(lp->fd, UM_ETH_IRQ);
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out:
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spin_unlock(&lp->lock);
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return(IRQ_HANDLED);
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}
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static int uml_net_open(struct net_device *dev)
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{
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struct uml_net_private *lp = dev->priv;
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int err;
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spin_lock(&lp->lock);
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if(lp->fd >= 0){
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err = -ENXIO;
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goto out;
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}
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if(!lp->have_mac){
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dev_ip_addr(dev, &lp->mac[2]);
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set_ether_mac(dev, lp->mac);
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}
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lp->fd = (*lp->open)(&lp->user);
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if(lp->fd < 0){
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err = lp->fd;
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goto out;
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}
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err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt,
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IRQF_DISABLED | IRQF_SHARED, dev->name, dev);
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if(err != 0){
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printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err);
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err = -ENETUNREACH;
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goto out_close;
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}
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lp->tl.data = (unsigned long) &lp->user;
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netif_start_queue(dev);
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/* clear buffer - it can happen that the host side of the interface
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* is full when we get here. In this case, new data is never queued,
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* SIGIOs never arrive, and the net never works.
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*/
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while((err = uml_net_rx(dev)) > 0) ;
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spin_unlock(&lp->lock);
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spin_lock(&opened_lock);
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list_add(&lp->list, &opened);
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spin_unlock(&opened_lock);
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return 0;
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out_close:
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if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user);
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lp->fd = -1;
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out:
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spin_unlock(&lp->lock);
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return err;
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}
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static int uml_net_close(struct net_device *dev)
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{
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struct uml_net_private *lp = dev->priv;
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netif_stop_queue(dev);
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spin_lock(&lp->lock);
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free_irq(dev->irq, dev);
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if(lp->close != NULL)
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(*lp->close)(lp->fd, &lp->user);
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lp->fd = -1;
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spin_unlock(&lp->lock);
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spin_lock(&opened_lock);
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list_del(&lp->list);
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spin_unlock(&opened_lock);
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return 0;
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}
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static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct uml_net_private *lp = dev->priv;
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unsigned long flags;
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int len;
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netif_stop_queue(dev);
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spin_lock_irqsave(&lp->lock, flags);
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len = (*lp->write)(lp->fd, &skb, lp);
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if(len == skb->len) {
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lp->stats.tx_packets++;
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lp->stats.tx_bytes += skb->len;
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dev->trans_start = jiffies;
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netif_start_queue(dev);
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/* this is normally done in the interrupt when tx finishes */
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netif_wake_queue(dev);
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}
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else if(len == 0){
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netif_start_queue(dev);
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lp->stats.tx_dropped++;
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}
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else {
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netif_start_queue(dev);
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printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len);
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}
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spin_unlock_irqrestore(&lp->lock, flags);
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dev_kfree_skb(skb);
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return 0;
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}
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static struct net_device_stats *uml_net_get_stats(struct net_device *dev)
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{
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struct uml_net_private *lp = dev->priv;
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return &lp->stats;
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}
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static void uml_net_set_multicast_list(struct net_device *dev)
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{
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if (dev->flags & IFF_PROMISC) return;
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else if (dev->mc_count) dev->flags |= IFF_ALLMULTI;
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else dev->flags &= ~IFF_ALLMULTI;
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}
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static void uml_net_tx_timeout(struct net_device *dev)
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{
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dev->trans_start = jiffies;
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netif_wake_queue(dev);
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}
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static int uml_net_set_mac(struct net_device *dev, void *addr)
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{
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struct uml_net_private *lp = dev->priv;
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struct sockaddr *hwaddr = addr;
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spin_lock(&lp->lock);
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memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN);
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spin_unlock(&lp->lock);
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return(0);
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}
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static int uml_net_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct uml_net_private *lp = dev->priv;
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int err = 0;
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spin_lock(&lp->lock);
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new_mtu = (*lp->set_mtu)(new_mtu, &lp->user);
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if(new_mtu < 0){
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err = new_mtu;
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goto out;
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}
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dev->mtu = new_mtu;
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out:
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spin_unlock(&lp->lock);
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return err;
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}
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static void uml_net_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strcpy(info->driver, DRIVER_NAME);
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strcpy(info->version, "42");
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}
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static struct ethtool_ops uml_net_ethtool_ops = {
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.get_drvinfo = uml_net_get_drvinfo,
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.get_link = ethtool_op_get_link,
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};
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void uml_net_user_timer_expire(unsigned long _conn)
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{
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#ifdef undef
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struct connection *conn = (struct connection *)_conn;
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dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn);
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do_connect(conn);
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#endif
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}
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static DEFINE_SPINLOCK(devices_lock);
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static LIST_HEAD(devices);
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static struct platform_driver uml_net_driver = {
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.driver = {
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.name = DRIVER_NAME,
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},
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};
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static int driver_registered;
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static int eth_configure(int n, void *init, char *mac,
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struct transport *transport)
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{
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struct uml_net *device;
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struct net_device *dev;
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struct uml_net_private *lp;
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int save, err, size;
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size = transport->private_size + sizeof(struct uml_net_private) +
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sizeof(((struct uml_net_private *) 0)->user);
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device = kmalloc(sizeof(*device), GFP_KERNEL);
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if (device == NULL) {
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printk(KERN_ERR "eth_configure failed to allocate uml_net\n");
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return(1);
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}
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memset(device, 0, sizeof(*device));
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INIT_LIST_HEAD(&device->list);
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device->index = n;
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spin_lock(&devices_lock);
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list_add(&device->list, &devices);
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spin_unlock(&devices_lock);
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if (setup_etheraddr(mac, device->mac))
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device->have_mac = 1;
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printk(KERN_INFO "Netdevice %d ", n);
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if (device->have_mac)
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printk("(%02x:%02x:%02x:%02x:%02x:%02x) ",
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device->mac[0], device->mac[1],
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device->mac[2], device->mac[3],
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device->mac[4], device->mac[5]);
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printk(": ");
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dev = alloc_etherdev(size);
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if (dev == NULL) {
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printk(KERN_ERR "eth_configure: failed to allocate device\n");
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return 1;
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}
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lp = dev->priv;
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/* This points to the transport private data. It's still clear, but we
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* must memset it to 0 *now*. Let's help the drivers. */
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memset(lp, 0, size);
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/* sysfs register */
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if (!driver_registered) {
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platform_driver_register(¨_net_driver);
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driver_registered = 1;
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}
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device->pdev.id = n;
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device->pdev.name = DRIVER_NAME;
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platform_device_register(&device->pdev);
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SET_NETDEV_DEV(dev,&device->pdev.dev);
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/* If this name ends up conflicting with an existing registered
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* netdevice, that is OK, register_netdev{,ice}() will notice this
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* and fail.
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*/
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snprintf(dev->name, sizeof(dev->name), "eth%d", n);
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device->dev = dev;
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(*transport->kern->init)(dev, init);
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dev->mtu = transport->user->max_packet;
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dev->open = uml_net_open;
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dev->hard_start_xmit = uml_net_start_xmit;
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dev->stop = uml_net_close;
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dev->get_stats = uml_net_get_stats;
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dev->set_multicast_list = uml_net_set_multicast_list;
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dev->tx_timeout = uml_net_tx_timeout;
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dev->set_mac_address = uml_net_set_mac;
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dev->change_mtu = uml_net_change_mtu;
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dev->ethtool_ops = ¨_net_ethtool_ops;
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dev->watchdog_timeo = (HZ >> 1);
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dev->irq = UM_ETH_IRQ;
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rtnl_lock();
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err = register_netdevice(dev);
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rtnl_unlock();
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if (err) {
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device->dev = NULL;
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/* XXX: should we call ->remove() here? */
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free_netdev(dev);
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return 1;
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}
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/* lp.user is the first four bytes of the transport data, which
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* has already been initialized. This structure assignment will
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* overwrite that, so we make sure that .user gets overwritten with
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* what it already has.
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*/
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save = lp->user[0];
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*lp = ((struct uml_net_private)
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{ .list = LIST_HEAD_INIT(lp->list),
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.dev = dev,
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.fd = -1,
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.mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},
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.have_mac = device->have_mac,
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.protocol = transport->kern->protocol,
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.open = transport->user->open,
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.close = transport->user->close,
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.remove = transport->user->remove,
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.read = transport->kern->read,
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.write = transport->kern->write,
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.add_address = transport->user->add_address,
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.delete_address = transport->user->delete_address,
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.set_mtu = transport->user->set_mtu,
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.user = { save } });
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init_timer(&lp->tl);
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spin_lock_init(&lp->lock);
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lp->tl.function = uml_net_user_timer_expire;
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if (lp->have_mac)
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memcpy(lp->mac, device->mac, sizeof(lp->mac));
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if (transport->user->init)
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(*transport->user->init)(&lp->user, dev);
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if (device->have_mac)
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set_ether_mac(dev, device->mac);
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return 0;
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}
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static struct uml_net *find_device(int n)
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{
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struct uml_net *device;
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struct list_head *ele;
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spin_lock(&devices_lock);
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list_for_each(ele, &devices){
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device = list_entry(ele, struct uml_net, list);
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if(device->index == n)
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goto out;
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}
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device = NULL;
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out:
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spin_unlock(&devices_lock);
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return(device);
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}
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static int eth_parse(char *str, int *index_out, char **str_out)
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{
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char *end;
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int n;
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n = simple_strtoul(str, &end, 0);
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if(end == str){
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printk(KERN_ERR "eth_setup: Failed to parse '%s'\n", str);
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return(1);
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}
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if(n < 0){
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printk(KERN_ERR "eth_setup: device %d is negative\n", n);
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return(1);
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}
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str = end;
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if(*str != '='){
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printk(KERN_ERR
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"eth_setup: expected '=' after device number\n");
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return(1);
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}
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str++;
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if(find_device(n)){
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printk(KERN_ERR "eth_setup: Device %d already configured\n",
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n);
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return(1);
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}
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if(index_out) *index_out = n;
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*str_out = str;
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return(0);
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}
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struct eth_init {
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struct list_head list;
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char *init;
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int index;
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};
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|
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/* Filled in at boot time. Will need locking if the transports become
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* modular.
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*/
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struct list_head transports = LIST_HEAD_INIT(transports);
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|
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/* Filled in during early boot */
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struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line);
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|
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static int check_transport(struct transport *transport, char *eth, int n,
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void **init_out, char **mac_out)
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{
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int len;
|
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len = strlen(transport->name);
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if(strncmp(eth, transport->name, len))
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return(0);
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eth += len;
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if(*eth == ',')
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eth++;
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else if(*eth != '\0')
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return(0);
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|
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*init_out = kmalloc(transport->setup_size, GFP_KERNEL);
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if(*init_out == NULL)
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return(1);
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|
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if(!transport->setup(eth, mac_out, *init_out)){
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kfree(*init_out);
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*init_out = NULL;
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}
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return(1);
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}
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|
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void register_transport(struct transport *new)
|
|
{
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|
struct list_head *ele, *next;
|
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struct eth_init *eth;
|
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void *init;
|
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char *mac = NULL;
|
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int match;
|
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|
|
list_add(&new->list, &transports);
|
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|
|
list_for_each_safe(ele, next, ð_cmd_line){
|
|
eth = list_entry(ele, struct eth_init, list);
|
|
match = check_transport(new, eth->init, eth->index, &init,
|
|
&mac);
|
|
if(!match)
|
|
continue;
|
|
else if(init != NULL){
|
|
eth_configure(eth->index, init, mac, new);
|
|
kfree(init);
|
|
}
|
|
list_del(ð->list);
|
|
}
|
|
}
|
|
|
|
static int eth_setup_common(char *str, int index)
|
|
{
|
|
struct list_head *ele;
|
|
struct transport *transport;
|
|
void *init;
|
|
char *mac = NULL;
|
|
|
|
list_for_each(ele, &transports){
|
|
transport = list_entry(ele, struct transport, list);
|
|
if(!check_transport(transport, str, index, &init, &mac))
|
|
continue;
|
|
if(init != NULL){
|
|
eth_configure(index, init, mac, transport);
|
|
kfree(init);
|
|
}
|
|
return(1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static int eth_setup(char *str)
|
|
{
|
|
struct eth_init *new;
|
|
int n, err;
|
|
|
|
err = eth_parse(str, &n, &str);
|
|
if(err) return(1);
|
|
|
|
new = alloc_bootmem(sizeof(new));
|
|
if (new == NULL){
|
|
printk("eth_init : alloc_bootmem failed\n");
|
|
return(1);
|
|
}
|
|
|
|
INIT_LIST_HEAD(&new->list);
|
|
new->index = n;
|
|
new->init = str;
|
|
|
|
list_add_tail(&new->list, ð_cmd_line);
|
|
return(1);
|
|
}
|
|
|
|
__setup("eth", eth_setup);
|
|
__uml_help(eth_setup,
|
|
"eth[0-9]+=<transport>,<options>\n"
|
|
" Configure a network device.\n\n"
|
|
);
|
|
|
|
#if 0
|
|
static int eth_init(void)
|
|
{
|
|
struct list_head *ele, *next;
|
|
struct eth_init *eth;
|
|
|
|
list_for_each_safe(ele, next, ð_cmd_line){
|
|
eth = list_entry(ele, struct eth_init, list);
|
|
|
|
if(eth_setup_common(eth->init, eth->index))
|
|
list_del(ð->list);
|
|
}
|
|
|
|
return(1);
|
|
}
|
|
__initcall(eth_init);
|
|
#endif
|
|
|
|
static int net_config(char *str)
|
|
{
|
|
int n, err;
|
|
|
|
err = eth_parse(str, &n, &str);
|
|
if(err) return(err);
|
|
|
|
str = kstrdup(str, GFP_KERNEL);
|
|
if(str == NULL){
|
|
printk(KERN_ERR "net_config failed to strdup string\n");
|
|
return(-1);
|
|
}
|
|
err = !eth_setup_common(str, n);
|
|
if(err)
|
|
kfree(str);
|
|
return(err);
|
|
}
|
|
|
|
static int net_id(char **str, int *start_out, int *end_out)
|
|
{
|
|
char *end;
|
|
int n;
|
|
|
|
n = simple_strtoul(*str, &end, 0);
|
|
if((*end != '\0') || (end == *str))
|
|
return -1;
|
|
|
|
*start_out = n;
|
|
*end_out = n;
|
|
*str = end;
|
|
return n;
|
|
}
|
|
|
|
static int net_remove(int n)
|
|
{
|
|
struct uml_net *device;
|
|
struct net_device *dev;
|
|
struct uml_net_private *lp;
|
|
|
|
device = find_device(n);
|
|
if(device == NULL)
|
|
return -ENODEV;
|
|
|
|
dev = device->dev;
|
|
lp = dev->priv;
|
|
if(lp->fd > 0)
|
|
return -EBUSY;
|
|
if(lp->remove != NULL) (*lp->remove)(&lp->user);
|
|
unregister_netdev(dev);
|
|
platform_device_unregister(&device->pdev);
|
|
|
|
list_del(&device->list);
|
|
kfree(device);
|
|
free_netdev(dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct mc_device net_mc = {
|
|
.name = "eth",
|
|
.config = net_config,
|
|
.get_config = NULL,
|
|
.id = net_id,
|
|
.remove = net_remove,
|
|
};
|
|
|
|
static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct in_ifaddr *ifa = ptr;
|
|
struct net_device *dev = ifa->ifa_dev->dev;
|
|
struct uml_net_private *lp;
|
|
void (*proc)(unsigned char *, unsigned char *, void *);
|
|
unsigned char addr_buf[4], netmask_buf[4];
|
|
|
|
if(dev->open != uml_net_open) return(NOTIFY_DONE);
|
|
|
|
lp = dev->priv;
|
|
|
|
proc = NULL;
|
|
switch (event){
|
|
case NETDEV_UP:
|
|
proc = lp->add_address;
|
|
break;
|
|
case NETDEV_DOWN:
|
|
proc = lp->delete_address;
|
|
break;
|
|
}
|
|
if(proc != NULL){
|
|
memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf));
|
|
memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf));
|
|
(*proc)(addr_buf, netmask_buf, &lp->user);
|
|
}
|
|
return(NOTIFY_DONE);
|
|
}
|
|
|
|
struct notifier_block uml_inetaddr_notifier = {
|
|
.notifier_call = uml_inetaddr_event,
|
|
};
|
|
|
|
static int uml_net_init(void)
|
|
{
|
|
struct list_head *ele;
|
|
struct uml_net_private *lp;
|
|
struct in_device *ip;
|
|
struct in_ifaddr *in;
|
|
|
|
mconsole_register_dev(&net_mc);
|
|
register_inetaddr_notifier(¨_inetaddr_notifier);
|
|
|
|
/* Devices may have been opened already, so the uml_inetaddr_notifier
|
|
* didn't get a chance to run for them. This fakes it so that
|
|
* addresses which have already been set up get handled properly.
|
|
*/
|
|
list_for_each(ele, &opened){
|
|
lp = list_entry(ele, struct uml_net_private, list);
|
|
ip = lp->dev->ip_ptr;
|
|
if(ip == NULL) continue;
|
|
in = ip->ifa_list;
|
|
while(in != NULL){
|
|
uml_inetaddr_event(NULL, NETDEV_UP, in);
|
|
in = in->ifa_next;
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
__initcall(uml_net_init);
|
|
|
|
static void close_devices(void)
|
|
{
|
|
struct list_head *ele;
|
|
struct uml_net_private *lp;
|
|
|
|
list_for_each(ele, &opened){
|
|
lp = list_entry(ele, struct uml_net_private, list);
|
|
free_irq(lp->dev->irq, lp->dev);
|
|
if((lp->close != NULL) && (lp->fd >= 0))
|
|
(*lp->close)(lp->fd, &lp->user);
|
|
if(lp->remove != NULL) (*lp->remove)(&lp->user);
|
|
}
|
|
}
|
|
|
|
__uml_exitcall(close_devices);
|
|
|
|
int setup_etheraddr(char *str, unsigned char *addr)
|
|
{
|
|
char *end;
|
|
int i;
|
|
|
|
if(str == NULL)
|
|
return(0);
|
|
for(i=0;i<6;i++){
|
|
addr[i] = simple_strtoul(str, &end, 16);
|
|
if((end == str) ||
|
|
((*end != ':') && (*end != ',') && (*end != '\0'))){
|
|
printk(KERN_ERR
|
|
"setup_etheraddr: failed to parse '%s' "
|
|
"as an ethernet address\n", str);
|
|
return(0);
|
|
}
|
|
str = end + 1;
|
|
}
|
|
if(addr[0] & 1){
|
|
printk(KERN_ERR
|
|
"Attempt to assign a broadcast ethernet address to a "
|
|
"device disallowed\n");
|
|
return(0);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
void dev_ip_addr(void *d, unsigned char *bin_buf)
|
|
{
|
|
struct net_device *dev = d;
|
|
struct in_device *ip = dev->ip_ptr;
|
|
struct in_ifaddr *in;
|
|
|
|
if((ip == NULL) || ((in = ip->ifa_list) == NULL)){
|
|
printk(KERN_WARNING "dev_ip_addr - device not assigned an "
|
|
"IP address\n");
|
|
return;
|
|
}
|
|
memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address));
|
|
}
|
|
|
|
void set_ether_mac(void *d, unsigned char *addr)
|
|
{
|
|
struct net_device *dev = d;
|
|
|
|
memcpy(dev->dev_addr, addr, ETH_ALEN);
|
|
}
|
|
|
|
struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra)
|
|
{
|
|
if((skb != NULL) && (skb_tailroom(skb) < extra)){
|
|
struct sk_buff *skb2;
|
|
|
|
skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC);
|
|
dev_kfree_skb(skb);
|
|
skb = skb2;
|
|
}
|
|
if(skb != NULL) skb_put(skb, extra);
|
|
return(skb);
|
|
}
|
|
|
|
void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *,
|
|
void *),
|
|
void *arg)
|
|
{
|
|
struct net_device *dev = d;
|
|
struct in_device *ip = dev->ip_ptr;
|
|
struct in_ifaddr *in;
|
|
unsigned char address[4], netmask[4];
|
|
|
|
if(ip == NULL) return;
|
|
in = ip->ifa_list;
|
|
while(in != NULL){
|
|
memcpy(address, &in->ifa_address, sizeof(address));
|
|
memcpy(netmask, &in->ifa_mask, sizeof(netmask));
|
|
(*cb)(address, netmask, arg);
|
|
in = in->ifa_next;
|
|
}
|
|
}
|
|
|
|
int dev_netmask(void *d, void *m)
|
|
{
|
|
struct net_device *dev = d;
|
|
struct in_device *ip = dev->ip_ptr;
|
|
struct in_ifaddr *in;
|
|
__u32 *mask_out = m;
|
|
|
|
if(ip == NULL)
|
|
return(1);
|
|
|
|
in = ip->ifa_list;
|
|
if(in == NULL)
|
|
return(1);
|
|
|
|
*mask_out = in->ifa_mask;
|
|
return(0);
|
|
}
|
|
|
|
void *get_output_buffer(int *len_out)
|
|
{
|
|
void *ret;
|
|
|
|
ret = (void *) __get_free_pages(GFP_KERNEL, 0);
|
|
if(ret) *len_out = PAGE_SIZE;
|
|
else *len_out = 0;
|
|
return(ret);
|
|
}
|
|
|
|
void free_output_buffer(void *buffer)
|
|
{
|
|
free_pages((unsigned long) buffer, 0);
|
|
}
|
|
|
|
int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out,
|
|
char **gate_addr)
|
|
{
|
|
char *remain;
|
|
|
|
remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL);
|
|
if(remain != NULL){
|
|
printk("tap_setup_common - Extra garbage on specification : "
|
|
"'%s'\n", remain);
|
|
return(1);
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
unsigned short eth_protocol(struct sk_buff *skb)
|
|
{
|
|
return(eth_type_trans(skb, skb->dev));
|
|
}
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|