Re: ctime set by truncate even if NOCMTIME requested

[Miklos Szeredi]

> > However if you know the cases where time is set implicitly by the
> > server, why can't you simply optimise away the ATTR_CTIME and/or
> > ATTR_MTIME?
> 
> How?  By checking whether ATTR_SIZE is also set?  Yes, that would work
> for truncate(), but it's rather more ugly than the proposed check for
> IS_NOCMTIME.

I have to correct myself: it seems, the check is not needed.  Ctime is
never set explicitly.  So filesystem can simply ignore ATTR_CTIME, and
do the right thing without it.

ATTR_MTIME is _only_ set in utime[s], which all filesystems want to
honor.

So I think the only thing CIFS needs is simply to ignore ATTR_CTIME.

Miklos
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