tree 32d0af298c1a757eeecf83bbd8e832f309c81a61
parent f7001fad6f30e20291870b9ce8558df28ea7221e
author Daniel Rosenberg <drosen@google.com> 1624667979 -0700
committer Daniel Rosenberg <drosen@google.com> 1625696607 +0000

libsnapshot: Add CowRevMergeOpIter

This presents cow ops in the reverse of their merge order, as requested
when we perform a merge. It starts with sorted non-ordered ops sorted by
blocks, and then the ordered ops. Already merged ops are removed.

Bug: 177104308
Test: cow_api_test
Change-Id: I864bcab5cda447cf4a197abc02d954f9db08b744