On Mon, 2017-01-23 at 17:26 +0100, hch wrote:
> On Mon, Jan 23, 2017 at 04:20:45PM +0000, Trond Myklebust wrote:
> > Note that the POSIX spec seems to have changed recently. The
> > current
> > spec appears to state that we should set the mtime and ctime (and
> > change attribute) on success in open(O_TRUNC), truncate() and
> > ftruncate(). In previous incarnations of the spec, truncate() would
> > only set the time if the size was changed:
>
> Interesting. But in this case historical Posix and thus Linux
> behavior
> still takes precedence and we're not suddently going to change
> behavior.
>
In that case the client will be required to continue to need to send
mtime/ctime in order to ensure that we get the same historical
semantics w.r.t. ftruncate() vs truncate().
IOW: It's not a question of the client being lazy about clearing the
flags. It's a question of enforcing the correct semantics.
--
Trond Myklebust
Linux NFS client maintainer, PrimaryData
trond.myklebust@xxxxxxxxxxxxxxx
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