Re: [PATCH 2/2] Enable v4 mounts when either "nfsvers=4" or "vers=4" option are set (vers-02)

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On Aug 28, 2009, at 12:41 PM, Christoph Hellwig wrote:
On Fri, Aug 28, 2009 at 12:35:29PM -0400, Steve Dickson wrote:
Question... How are will it be to back out of this? Meaning the
kernel tries a v4 mount only to see the server does not support v4
or for some other recoverable error and then has to restart back
down the mount NFS again... This is very fairly trivial in user space...

Same as we do now?  As soon as it doesn't work return an error, unwind
and return to userspace?

If we handle NFSv4 in nfs_get_sb(), then we can handle version/ transport negotiation entirely in the kernel, which is another long term goal.

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



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