> Package: nfs-common > Version: 1:1.2.6-4 > Severity: normal > > Dear Maintainer, > > I met a strange behavour of mount.nfs. > When I run "mount -o remount /nfs/mntpnt", it terminated silently but > the exit status was 32. Actually when I add "-v" option, it prints > "mount.nfs: mount(2): Invalid argument".
I think I could see the scenario. - on wheezy, /etc/mtab becomes a symlink to /proc/mounts. - mount.nfs writes the given mount options to /etc/mtab, (but not to /proc/mounts.) - I found the problematic option is "sec=sys". - when /etc/mtab is a regular file, "sec=sys" is not written since it was not specified explicitly at the mount-time. - but /proc/mounts always shows "sec=". - when /etc/mtab is a symlink, mount(8) retrives the option strings from /proc/mounts including "sec=sys" and passes it to mount.nfs. - NFS in kernel-space parses the given options, compares them with the internally stored flags, and found that + "sec=sys" is given explicitly. + but the internal status doesn't have "sec=sys" flag set. - finally this un-matching is the cause of "mount.nfs: mount(2): Invalid argument." In order to fix the problem, there may exist several ways. But I am not sure which is best. - stop /etc/mtab symlink-ing /proc/mounts (by Debian developers). - at the mount-time of NFS, set "sec=sys" (NFS_MOUNT_SECFLAVOUR) by default (by NFS developers). - mount.nfs always writes the "sec=sys" string (by mount.nfs developers). I suppose the best way should be decided after the discussion between NFS developers, mount.nfs developers and Debian developers. J. R. Okajima -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/7803.1374511839@jrobl
