[Bug 281990] offset of sa_family in sockaddr_ib inconsistent with sockaddr

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281990

--- Comment #4 from Konstantin Belousov <kib@FreeBSD.org> ---
Besides ABI issue already pointed out.

I suspect that such change is very complex and not limited to recompilation and
dso versions bump.  We need to ensure that len field is filled, and perhaps
checked at right places.  Since OFED code comes from Linux where no len field
exists AFAIR, it means the full audit of the vendor code.  Also it means a
serious incompatibility with the Linux code, where IB/RDMA apps cannot be
recompiled on FreeBSD without even more code changes.

Well, I do not object against making this right, but it is huge work IMO.

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