In satellite/accounting/rollup Service.RollupStorage we have a few
potential error scenarios that return time.Now(). Especially in the case
where we exit early because we have received 0 tallies since the *last*
rollup, this creates a potential race condition.
Between the time we call GetTalliesSince and realize it is empty, it's
possible a tally was inserted in that interval. As currently written we
are returning a latestTally time that excludes that tally.
We are currently protected because in Service.Rollup we don't save the
rollup unless we have populated the rollupStats. However, this change is
more correct and future-proof, because Service.RollupStorage should
always return a correct latestTally time, which in case of errors and
empty tallies, is the last successful tally.
Change-Id: I2521a2cc9802c8f06e512dde4422803a272e2a0a
* rename pkg/linksharing to linksharing
* rename pkg/httpserver to linksharing/httpserver
* rename pkg/eestream to uplink/eestream
* rename pkg/stream to uplink/stream
* rename pkg/metainfo/kvmetainfo to uplink/metainfo/kvmetainfo
* rename pkg/auth/signing to pkg/signing
* rename pkg/storage to uplink/storage
* rename pkg/accounting to satellite/accounting
* rename pkg/audit to satellite/audit
* rename pkg/certdb to satellite/certdb
* rename pkg/discovery to satellite/discovery
* rename pkg/overlay to satellite/overlay
* rename pkg/datarepair to satellite/repair
