Re: [libvirt] [Qemu-devel] [RFC PATCH 0/4] block: file descriptor passing using -filefd and getfd_file

> This patch series adds the -filefd command-line option and the > getfd_file monitor command. This will enable libvirt to open a > file and push the corresponding filename and file descriptor to > QEMU. When QEMU needs to "open" a file, it will first check if the > file descriptor was passed by either of these methods before > attempting to actually open the file. I thought we decided to avoid making some file names magic, and instead go for the obvious /dev/fd/42?