Re: [PATCH RFC v3] vfs: make fstatat retry once on ESTALE errors from getattr call

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Jeff Layton <jlayton@xxxxxxxxxx> writes:

> Ok, but again, that only applies to the lookup. It has no bearing on
> the subsequent operation. For instance, if we're doing:
>      rename("/foo", "/bar");
> ...and another client is simultaneously doing:
>      creat("/bar/baz", 0600);
> ...and we get back ESTALE from the server on the create because the
> "old" /bar got replaced after the lookup of it. Then it seems like
> returning -ENOENT would not be correct since there was never a time
> where /bar didn't exist...

It may not be "correct" according to some standard.  But it's what Linux
does since day one on *all* filesystems.  And probably other OS's that
have remotely scalable lookup routines.

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