In current design, we have two elements for a helper operation: a helper, which is specific to a storage, and a helper context which is specific to

.

There are several problems with the design:

• Helper for a storage can change on-the-fly, requiring us to detect and convert the context on-the-fly as well (and we don't have any data needed to create the new context).
• The context is converted every time a context from a different helper is used
• Some logic is ill-suited for either level (file or storage), e.g. a per-user connection in Ceph shouldn't be per-file (in helper context) nor per-storage (in helper)
• The interface is dynamic to the point of being silly (e.g. everything is passed as <string,string> map)

Some thoughts:

• Decouple context from helper
• Introduce another, user-level context