riastradh fcabfbde55 Add a flag to dk_dump for virtual disk devices.
If a disk is backed by a physical medium other than itself, such as
cgd(4), then it passes DK_DUMP_RECURSIVE to disable the recursion
detection for dk_dump.

If, however, a device represents a physical medium on its own, such
as wd(4), then it passes 0 instead.

With this, I can now dump to dk on cgd on dk on wd.
2020-03-01 03:21:54 +00:00
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