Device Mapper Query

[Satyajeet]

Does the dmsetup <dm-dev> <table-file> command, calls the constructor* *
dm_ctr_fn??

If yes what are the argv passed in the dm_ctr_fn, are they the args you
pass to dmsetup??

Is this constructor a callback from dm layer? when it is invoked and how it
is invoked?

Replies will be appreciated.

Regards,
satyajeet
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