Public bug reported: It appears that on Ubuntu 8.04 the binary /sbin/mount.nfs no longer understands certain (standard?) mount options which work on Ubuntu 7.10. This is bad for compatibility!
Instructions to reproduce the behaviour: 1.) both on Ubuntu 8.04 and 7.10: Configure an NFS server and have it export a directory "/smb" ... e.g. my /etc/exports looks like this: /smb *(rw,async,no_root_squash,no_subtree_check) 2.) Now try to mount it onto your localhost with this command: sudo mount -t nfs -o rw,udp,mountvers=2,port=4242 localhost:/smb /smb Results you will get: * Ubuntu 7.10: Everything OK, works tip top. A simple "mount" returns this: ~$ mount ... localhost:/smb on /smb type nfs (rw,udp,mountvers=2,port=4242,addr=127.0.0.1) The application (please see below for details) I have to do this for also works tip top with Ubuntu 7.10. * Ubuntu 8.04: Does not work! The "mount" binary immediately exists with this error message: "mount.nfs: an incorrect mount option was specified" If I modify above command e.g. so that it now looks like this (leaving away the "mountvers=2" parameter) ...: sudo mount -t nfs -o rw,udp,port=4242 localhost:/smb /smb ... then "mount" seems to hang for quite a while and then after several minutes simply exits with this message: "mount.nfs: internal error" ... Without giving any further explanation of what might be wrong! "dmesg" shows this line: "[718405.028275] nfs: server localhost not responding, timed out" ... But according to the "nfs-kernel-server" itself it is running: # /etc/init.d/nfs-kernel-server status nfsd running The same message about "nfs: server localhost not responding, timed out" is also present in /var/log/messages but other than this there are no indications of why this does not work anymore (again: it works tip top in Ubuntu 7.10 and other Linux distributions). Background: We are using "Sun Secure Global Desktop" (see here: http://www.sun.com/software/products/sgd/get.jsp) and Ubuntu as application server (e.g. Ubuntu's Gnome desktop session is served as application to our SGD users) and for everything (= audio forwarding, client drive mapping, seamless window mode) to work it is necessary to install the "SGD Client Enhancement Module". Details about that one can be found here: http://docs.sun.com/source/820-2550/cdm.html This page explains in detail how NFS and exporting the "/smb" share is needed for "Client Drive Mapping" to work: http://docs.sun.com/source/820-2550/cdm.html#unixappserver As per these instructions by SUN, when you issue this command: /opt/tta_tem/bin/tem startcdm ... to trigger the "client drive mapping" functionality then this script "/opt/tta_tem/bin/tem" is executed which ultimately triggers the mount command I give above (I checked via "strace"): "mount -t nfs -o rw,udp,mountvers=2,port=4242 localhost:/smb /smb" So this explains why I need above command to work, no matter how strange and pointless it may look. As explained above, I can use "Sun Secure Global Desktop" with Ubuntu 7.10 and with "client drive mapping" (and therefore via that funny- looking "mount" command above!) users who login get the drives of their client PC (e.g. their C:\ .... or their $HOME directory) mapped onto the remotely running desktop session (e.g. Ubuntu's Gnome session) as if it were connected directly to the server. Trust me, this is a very cool feature. With Ubuntu 8.04 however this does not work anymore. So it all boils down to the fact that this command (regardless how odd and pointless it may look): sudo mount -t nfs -o rw,udp,mountvers=2,port=4242 localhost:/smb /smb ... works tip top on Ubuntu 7.10 ... but does not work at all on Ubuntu 8.04 ... Which means that we cannot use Ubuntu 8.04 in connection with "Sun Secure Global Desktop" and maybe other enterprise products as well. So am I right to assume that something was changed in the "mount.nfs" binary and that this might be a bug? If it's not a bug .... could we please have 7.10's binaries back? :-) ** Affects: nfs-utils (Ubuntu) Importance: Undecided Status: New ** Tags: gutsy hardy mount nfs options -- Ubuntu 8.04: /sbin/mount.nfs no longer understands certain (standard?) mount options https://bugs.launchpad.net/bugs/251923 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
