add key stability checking interface

Needed for resuming from chunks.

Url keys are considered not stable. I considered treating url keys with a
known size as stable, but just don't feel that is enough information.
This commit is contained in:
Joey Hess 2014-07-27 12:33:46 -04:00
parent aad8cfe718
commit 13bbb61a51
5 changed files with 18 additions and 1 deletions

View file

@ -23,6 +23,7 @@ backend = Backend
, fsckKey = Nothing
, canUpgradeKey = Nothing
, fastMigrate = Nothing
, isStableKey = const True
}
{- The key includes the file size, modification time, and the