[Xen-devel] [PATCH 0 of 7 v2] blktap3: Introduce the tapback daemon (most of blkback in user-space).

[Thanos Makatos <thanos.makatos@xxxxxxxxxx>]

This patch series introduces the tapback daemon, the user space daemon that
acts as a device's back-end, essentially most of blkback in user space. The
daemon is responsible for coordinating the front-end and tapdisk. It instructs
the tapdisk to connect to/disconnect from the shared ring, and manages the
state of the back-end.

The shared ring between the front-end and tapdisk is created by a library that
will be introduced in another patch series (the entry point is function
tap_ctl_connect_xenblkif in frontend.c). This library also contains the
functionality that enables tapdisk to directly access the shared ring.

This series requires the RFC series described in
http://lists.xen.org/archives/html/xen-devel/2012-12/msg00254.html
in order to compile.

---
Changes since v1:
The series has been largely reorganised:
* Renamed the daemon from xenio to tapback.
* Improved description in patch 0.
* Merged structures and functions.
* Disaggregated functionality from the core daemon source file to smaller ones
  in order to facilitate the review process and improve maintenance.

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