[Bug 185619] [VNET] Name conflict not checked when a child vnet goes away and returns its interface(s) back to the parent
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Date: Wed, 21 Feb 2024 22:08:51 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=185619
c433li@gmail.com changed:
What |Removed |Added
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CC| |c433li@gmail.com
--- Comment #6 from c433li@gmail.com ---
Just encountered this issue on 14.0-RELEASE.
> Option 1: Give the returned interface a random, unique name.
Since jids are never recycled, does this approach really have to be
non-deterministic? I mean, it seems to me that we could make up some sort of
convention that interfaces recycled from a destroyed vnet be given a special
name such as `<if_type>_recycle_<jid>`, and for hierarchical jails we can
append the nested jids to it, such as `<if_type>_recycle_<jid>_<nested_jid>`.
It is still possible to have naming conflict if the user insist on renaming
their interface to one of these "special" names, but this approach can
eliminate the majority of these conflicts without architectural changes.
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