Don't panic if setting vdev properties is unsupported for this vdev type #15063
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Return EINVAL instead of panicking if vdev does not support setting vdev properties.
Motivation and Context
Panicking is a really bad way of communicating to user that this vdev type does not support setting vdev properties.
Description
Check that vdev has valid zap and bail out early.
While here, move objid selection out of the loop, it's not going to change.
How Has This Been Tested?
Types of changes
Checklist:
Signed-off-by
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