While deploying rpm 4.14.3-21.3.hsx.el8, we found out that hardlinks stopped working.

The TL;DR is that since rpm GH#1534, files are being copied to a temporary location which is the actual filename with ;${tid} appended to it.

This broke with the following error:

error: reflink: Unable to hard link /foo/hello -> /foo/hello-bar;6207219c due to No such file or directory
error: Plugin reflink: hook fsm_file_install failed
error: unpacking of archive failed on file /foo/hello-bar;6207219c:
cpio: (error 0x2)
error: hlinktest-1.0-1.noarch: install failed

The fix is to get reflink to keep tab on the hardlink path vs the index, which we used to then fetch the file path from the header.

Here is the patch https://gist.github.com/chantra/261747b4aaed07a4f04e54be01f2b7a4