bin/111354: Mountd replies using wrong source address

[Tom Judge]

>Number:         111354
>Category:       bin
>Synopsis:       Mountd replies using wrong source address
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Apr 07 12:00:12 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Tom Judge
>Release:        6.2-RELEASE
>Organization:
>Environment:
FreeBSD beaker.mintel.co.uk 6.2-RELEASE FreeBSD 6.2-RELEASE #2: Tue Mar 20 10:32:46 GMT 2007     root at bob.mintel.co.uk:/usr/obj/usr/src/sys/BUNSEN_BEAKER  i386
>Description:
When using an IP alias to provide NFS services to a network mountd will reply to requests sent to the alias IP from the main IP on that network:

ifconfig em0
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 8192
        options=b<RXCSUM,TXCSUM,VLAN_MTU>
        inet 172.31.0.19 netmask 0xffffff00 broadcast 172.31.0.255
        inet 172.31.0.200 netmask 0xffffffff broadcast 172.31.0.200
        ether 00:13:72:5c:89:67
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active

Relevant line from client fstab:
172.31.0.200:/cfarm/ports /usr/ports      nfs     ro              0       0


When the client mounts the file system replies from mountd originate from 172.31.0.19 rather than from 172.31.0.200.

Could this be solved by adding the -h option mountd that is already present in nfsd and rpcbind,  so that the bind address of mountd could be specified?

>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: