iscsi tools: support hostnames in node mode

You can now pass in hostnames as the portal argument.

If you had:

iscsiadm -m node -P 1
Target: iqn.2008-09.com.meanminna:3
	Portal: 20.15.0.12:3260,1
		Iface Name: default

Then you can do

iscsiadm -m node -T iqn.2008-09.com.meanminna:3 -p somehostname -l

and iscsiadm will match this.

For discovery mode we already support hostnames, but we do not support
mixing. So if you used a hostname for discovery:

iscsiadm -m discoverdb -t st -p somehostname -D

Then when you run other discovery commands you have to use the hostname.

iscsiadm -m discoverydb -t st -p somehostname -o update -n someval -v
val

will work, but

iscsiadm -m discoverydb -t st -p 20.15.0.12 -o update -n someval -v val

would not.

For node mode, you do not have any control what the target returns
(and it probably returns a address) but for discovery you can pass
in what you want, so I think this should be ok.

1 files changed, 8 insertions, 2 deletions

diff --git a/doc/iscsiadm.8 b/doc/iscsiadm.8
index 177d3cd..53900a9 100644
--- a/doc/iscsiadm.8
+++ b/doc/iscsiadm.8
@@ -171,8 +171,14 @@ sid is passed in.
 
 .TP
 \fB\-p\fR, \fB\-\-portal=\fIip[:port]\fR
-Use target portal with ip-address \fIip\fR and \fIport\fR, the default
-\fIport\fR value is 3260.
+Use target portal with ip-address \fIip\fR and \fIport\fR. If port is not passed
+in the default \fIport\fR value is 3260.
+.IP
+IPv6 addresses can bs specified as [ddd.ddd.ddd.ddd]:port or
+ddd.ddd.ddd.ddd.
+.IP
+Hostnames can also be used for the ip argument.
+
 .IP
 This option is only valid for discovery, or for node operations with
 the \fInew\fR operator.