On 12/08/2010 09:56 AM, Ondrej Valousek wrote: > On 08.12.2010 14:45, Ian Kent wrote: >> On Wed, 2010-12-08 at 13:51 +0100, Ondrej Valousek wrote: >>> On 08.12.2010 13:36, Ian Kent wrote: >>>> The default should be determined by mount.nfs(8) since that's what >>>> autofs uses to perform mounts. >>> I see, but it works only if the nfs4 root export is the same as /. It >>> does not work otherwise. Example: >>> Server 'dorado' exporting directory /exports which is also fsid=0 for >>> nfs4. >>> There is (also shared) subdirectory 'ext1' in this one. When I do: >>> >>> cd /net/dorado/exports/ext1 >>> >>> ... the export is mounted using NFSv3. Theoretically if I did: >>> >>> cd /net/dorado/ext1 >>> >>> ... I should have the same mounted via NFSv4, right? Unfortunately it >>> does not work. But it should because: >>> >>> mount dorado:/ext1 /mnt >>> >>> works (giving nfs4 mount).... >> The only information the hosts map has to go on is the export list >> received from the server. >> >> There is no way for autofs to know that /exports is the global root from >> the mountd exports information. It only knows that /exports is an export >> and neither does it know what NFS version the server may offer for this >> mount. That information just isn't available. >> >> As I said, I thought in recent Fedora releases (not sure now when this >> should have happened), that >> >> mount <server>:/exports /<some mount point> >> >> and >> >> mount <server>:/ /<some mount point> >> >> should both work and mount as NFSv4. Correct me if I'm wrong but your >> point is that it is mounting as NFSv3 so perhaps we should log a bug and >> see what the experts have to say on this. >> >> Ian >> >> > Hi Ian, > > I understand that autofs can not know that /exports is a global root. I just > thought that mine: > > cd /net/dorado/ext1 > > ... (i.e. omitting the "exports" word) should work as this way should autofs > pass something like this : "mount.nfs dorado:/ext1 /net/dorado/ext1" which > would succeed then, resulting in a nfs4 mount. What happens now is > (obviously) that autofs can not find 'ext1' in the exports information from > 'dorado' and so it fails even without trying.... It depends on your server... If your server does not support v4, the mount will roll back to v3. An rpcinfo -p <server> will show if the server support v4.
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