tree 4ef87d05240e90480749c345274a83094caf66f0
parent 9555c6c180600b40f6e86bd4dc53bf47e06ed663
author Ilya Dryomov <idryomov@gmail.com> 1326744289 +0200
committer Ilya Dryomov <idryomov@gmail.com> 1326744289 +0200

Btrfs: allow for pausing restriper

Implement an ioctl for pausing restriper.  This pauses the relocation,
but balance is still considered to be "in progress": balance item is
not deleted, other volume operations cannot be started, etc.  If paused
in the middle of profile changing operation we will continue making
allocations with the target profile.

Add a hook to close_ctree() to pause restriper and free its data
structures on unmount.  (It's safe to unmount when restriper is in
"paused" state, we will resume with the same parameters on the next
mount)

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>