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[IPV4] ipconfig: Fix regression in ip command line processing

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The recent changes for ip command line processing fixed some problems
but unfortunately broke some common usage scenarios.  In current
2.6.24-rc6 the following command line results in no IP address
assignment, which is surely a regression:

 ip=10.0.2.15::10.0.2.2:255.255.255.0::eth0:off

Please find below a patch that works for all cases I can find.

Signed-off-by: Amos Waterland <apw@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amos Waterland 2008-01-05 23:23:06 -08:00 committed by David S. Miller
parent f844c74fe0
commit 92ffb85dd3
2 changed files with 19 additions and 4 deletions
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1
Documentation/nfsroot.txt
View file

@ -145,6 +145,7 @@ ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>
this option.
off or none: don't use autoconfiguration
(do static IP assignment instead)
on or any: use any protocol available in the kernel
(default)
dhcp: use DHCP

22
net/ipv4/ipconfig.c
View file

@ -1404,8 +1404,7 @@ static int __init ic_proto_name(char *name)
return 1;
}
if (!strcmp(name, "off") || !strcmp(name, "none")) {
ic_enable = 0;
return 1;
return 0;
}
#ifdef CONFIG_IP_PNP_DHCP
else if (!strcmp(name, "dhcp")) {
@ -1442,10 +1441,22 @@ static int __init ip_auto_config_setup(char *addrs)
ic_set_manually = 1;
ic_enable = 1;
/*
* If any dhcp, bootp etc options are set, leave autoconfig on
* and skip the below static IP processing.
*/
if (ic_proto_name(addrs))
return 1;
/* Parse the whole string */
/* If no static IP is given, turn off autoconfig and bail. */
if (*addrs == 0 ||
strcmp(addrs, "off") == 0 ||
strcmp(addrs, "none") == 0) {
ic_enable = 0;
return 1;
}
/* Parse string for static IP assignment. */
ip = addrs;
while (ip && *ip) {
if ((cp = strchr(ip, ':')))
@ -1483,7 +1494,10 @@ static int __init ip_auto_config_setup(char *addrs)
strlcpy(user_dev_name, ip, sizeof(user_dev_name));
break;
case 6:
ic_proto_name(ip);
if (ic_proto_name(ip) == 0 &&
ic_myaddr == NONE) {
ic_enable = 0;
}
break;
}
}