Can nilfs "roll back" to a previous state of the file system?
For example, at some time = T(N), I have a file system in a known good
state. So I check point it before taking a risky action. Then I take a
risky action which leads me to the file system state at T(N+1).
Sometimes, my risky action will be fine and I'll want to continue on.
Other times, my risky action will result in a polluted, useless
collection of data which I would like to discard.
I understand that at time T(N+1) nilfs will allow me to create a
checkpoint of T(N) which can be mounted read-only. What I'm asking is
if nilfs can discard the state at T(N+1) and "roll back" to the state at
T(N) as though T(N+1) had never happened.
Can nilfs do this kind of "roll back"?
--rich
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