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SubjectRe: [NFS] attempt to use V1 mount protocol on V3 server
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>>>>> " " == Pascal Schmidt <der.eremit@email.de> writes:

> a) when unmounting an NFS volume, the server gets sent an umount
> request indicating version 1 of the protocol, sending a
> version 3 umount is not even attempted

> b) when something goes wrong during the NFSv3 mount, the kernel
> seems to fall back to NFSv2, re-attempting the mount with
> mount protocol version 1

> I think both of this should not be done when the remote side
> does not advertise mount protocol version 1 support.

> Question: is this a problem of the user-space mount utility or
> is it an in-kernel problem?


a) Is a feature of the 'mount' program. An NFS server should in any
case not rely on the umount being sent: a client may have crashed
or been firewalled, or whatever...

b) Is a kernel feature which will never trigger if you are passing a
correct filehandle from your mountd.

Cheers,
Trond
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