HAMMER Utilities: Mirroring and pseudo-fs directives
* Add mirror-read, mirror-write, and mirror-copy.
* Replace the pseudofs directive with pfs-status, pfs-create, and pfs-update.
Create a pseudofs configuration infrastructure. Configuration parameters
can be specified via pfs-create and pfs-update for any HAMMER filesystem or
HAMMER pseudo-filesystem. This is basically how you tell HAMMER that
a particular pfs is a master or slave, and allows both a unique and a shared
uuid to be associated with the pfs. The mirroring code will only mirror
to targets with the same shared uuid as the master sourcing the data.