Date: Fri, 19 May 2023 08:00:02 -0700 From: Rick Macklem <rick.macklem@gmail.com> To: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: RFC: MFC'ng a change to struct mount Message-ID: <CAM5tNy7SdXOF7DXGYVHLEUENQmjHf8FZQwRQ_dGVRr2Ki52KbA@mail.gmail.com>
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Hi,
Since there seemed to be interest in it, I have MFC'd most of
the changes needed to run nfsd(8) in a vnet jail to stable/13.
However, there is one change that *might* affect the VFS KAPI.
I need to add a pointer called mnt_exjail to struct mount.
There is a field called mnt_pad0. It is 32bits, but is followed
by a field that is a structure. As such, replacing it with the pointer
does not change the offsets of subsequent fields for amd64.
--> Since mnt_exjail is only used in generic code, this should
not break the VFS KAPI for amd64, I think?
I will check i386, but since it will be replacing a 32bit field with a
32bit pointer, I suspect it will be ok.
Does anyone think some other architecture will be broken by this
or know an easy way I can check all arches?
Thanks for any input, rick
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