Re: [PATCH 1/6] statx: Add a system call to make enhanced file info available

David Howells
2016-05-09T13:00:25Z

David Howells <dhowells@redhat.com> wrote:

> > > st_gen is
> > > the inode generation number, st_btime is the file creation time, st_version
> > > is the data version number (i_version),
> >
> > Please define semantics for st_gen and st_version.
>
> I've been asked to drop st_gen for security reasons.
>
> I can't offhand think of a way to define st_version (or i_version, for that
> matter) that would be consistent across all filesystems. I would lean towards
> "gets incremented monotonically by 1 for each data write operation committed,
> but not for any metadata operations", but I'm fairly certain this won't jibe
> with disk operations.

I meant disk filesystems that we have now, not disk operations.

David