8210fd2a9f
When the UML network driver generates random MACs for its devices, it was possible for a number of UMLs to get the same MACs because the ethernet initialization was done before the random pool was properly seeded. This patch moves the initialization later so that it gets better randomness. Signed-off-by: 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>
102 lines
2.5 KiB
C
102 lines
2.5 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/kernel.h"
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#include "linux/init.h"
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#include "linux/netdevice.h"
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#include "linux/etherdevice.h"
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#include "net_kern.h"
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#include "net_user.h"
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#include "daemon.h"
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struct daemon_init {
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char *sock_type;
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char *ctl_sock;
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};
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static void daemon_init(struct net_device *dev, void *data)
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{
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struct uml_net_private *pri;
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struct daemon_data *dpri;
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struct daemon_init *init = data;
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pri = dev->priv;
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dpri = (struct daemon_data *) pri->user;
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dpri->sock_type = init->sock_type;
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dpri->ctl_sock = init->ctl_sock;
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dpri->fd = -1;
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dpri->control = -1;
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dpri->dev = dev;
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/* We will free this pointer. If it contains crap we're burned. */
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dpri->ctl_addr = NULL;
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dpri->data_addr = NULL;
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dpri->local_addr = NULL;
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printk("daemon backend (uml_switch version %d) - %s:%s",
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SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
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printk("\n");
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}
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static int daemon_read(int fd, struct sk_buff **skb,
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struct uml_net_private *lp)
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{
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*skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
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if(*skb == NULL) return(-ENOMEM);
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return(net_recvfrom(fd, (*skb)->mac.raw,
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(*skb)->dev->mtu + ETH_HEADER_OTHER));
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}
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static int daemon_write(int fd, struct sk_buff **skb,
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struct uml_net_private *lp)
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{
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return(daemon_user_write(fd, (*skb)->data, (*skb)->len,
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(struct daemon_data *) &lp->user));
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}
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static const struct net_kern_info daemon_kern_info = {
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.init = daemon_init,
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.protocol = eth_protocol,
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.read = daemon_read,
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.write = daemon_write,
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};
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static int daemon_setup(char *str, char **mac_out, void *data)
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{
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struct daemon_init *init = data;
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char *remain;
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*init = ((struct daemon_init)
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{ .sock_type = "unix",
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.ctl_sock = "/tmp/uml.ctl" });
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remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
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NULL);
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if(remain != NULL)
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printk(KERN_WARNING "daemon_setup : Ignoring data socket "
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"specification\n");
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return(1);
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}
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static struct transport daemon_transport = {
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.list = LIST_HEAD_INIT(daemon_transport.list),
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.name = "daemon",
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.setup = daemon_setup,
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.user = &daemon_user_info,
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.kern = &daemon_kern_info,
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.private_size = sizeof(struct daemon_data),
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.setup_size = sizeof(struct daemon_init),
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};
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static int register_daemon(void)
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{
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register_transport(&daemon_transport);
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return 0;
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}
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late_initcall(register_daemon);
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