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>
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
#include "linux/kernel.h"
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#include "linux/stddef.h"
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#include "linux/init.h"
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#include "linux/netdevice.h"
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#include "linux/if_arp.h"
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#include "net_kern.h"
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#include "net_user.h"
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#include "kern.h"
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#include "slip.h"
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struct slip_init {
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char *gate_addr;
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};
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void slip_init(struct net_device *dev, void *data)
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{
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struct uml_net_private *private;
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struct slip_data *spri;
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struct slip_init *init = data;
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private = dev->priv;
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spri = (struct slip_data *) private->user;
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memset(spri->name, 0, sizeof(spri->name));
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spri->addr = NULL;
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spri->gate_addr = init->gate_addr;
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spri->slave = -1;
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spri->dev = dev;
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slip_proto_init(&spri->slip);
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dev->init = NULL;
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dev->header_cache_update = NULL;
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dev->hard_header_cache = NULL;
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dev->hard_header = NULL;
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dev->hard_header_len = 0;
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dev->addr_len = 0;
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dev->type = ARPHRD_SLIP;
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dev->tx_queue_len = 256;
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dev->flags = IFF_NOARP;
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printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
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}
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static unsigned short slip_protocol(struct sk_buff *skbuff)
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{
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return(htons(ETH_P_IP));
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}
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static int slip_read(int fd, struct sk_buff **skb,
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struct uml_net_private *lp)
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{
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return(slip_user_read(fd, (*skb)->mac.raw, (*skb)->dev->mtu,
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(struct slip_data *) &lp->user));
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}
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static int slip_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(slip_user_write(fd, (*skb)->data, (*skb)->len,
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(struct slip_data *) &lp->user));
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}
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const struct net_kern_info slip_kern_info = {
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.init = slip_init,
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.protocol = slip_protocol,
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.read = slip_read,
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.write = slip_write,
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};
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static int slip_setup(char *str, char **mac_out, void *data)
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{
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struct slip_init *init = data;
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*init = ((struct slip_init)
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{ .gate_addr = NULL });
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if(str[0] != '\0')
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init->gate_addr = str;
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return(1);
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}
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static struct transport slip_transport = {
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.list = LIST_HEAD_INIT(slip_transport.list),
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.name = "slip",
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.setup = slip_setup,
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.user = &slip_user_info,
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.kern = &slip_kern_info,
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.private_size = sizeof(struct slip_data),
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.setup_size = sizeof(struct slip_init),
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};
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static int register_slip(void)
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{
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register_transport(&slip_transport);
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return 0;
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}
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late_initcall(register_slip);
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