pfSense

Moving from internal Redmine 6304 since this affects CE and Plus and isn't hardware-dependent.

Original Description:

In current 21.02 snaps re-root works fine in ZFS.

From notes:

For reference:

This was prevented in the past because it led to a crash with ZFS, but that was 4 years and many versions ago:

https://redmine.pfsense.org/issues/6045#note-7
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210721

Looks like that PR was fixed up long ago and so it should be safe now.

--

Done on CE:

3f70683931a2d00856bca5f0061b41ca98844916

And for Plus:

https://gitlab.netgate.com/pfSense/factory/-/commit/fdb04ade48f74909150c419e2a3e75dda8e33164 (21.05)
https://gitlab.netgate.com/pfSense/factory/-/commit/a4c95d0d108c0aa3bd49188d964e7c9534a9b2fa (plus-master)