[Qemu-devel] [PATCH v2 0/3] gluster: conversion to coroutines and supporting write_zeroes

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

Hi,

This series is about converting all the bdrv_aio* implementations in gluster
driver to coroutine based implementations. Read, write, flush and discard
routines are converted.

This also adds support for .bdrv_co_write_zeroes() in gluster and provides
a new preallocation option with qemu-img (-o preallocation=full) that can
be used for raw images on GlusterFS backend to create fully allocated and
zero-filled images.

Changes in v2
-------------
- Don't use QEMU's AIO infrastructure (BlockDriverAIOCB, qemu_aio_get/release)
  at all, instead manage the request structure completely within gluster driver.
- Minor code cleanups.

Changes in v1
-------------
- Removed qemu_gluster_aio_cancel() and associated code.
- Calling qemu_aio_release() from where aiocb is created.
- s/qemu_gluster_aio_rw/qemu_gluster_co_rw.
- Use errno appropriately from read, write, flush, discard and zerofill routines
  in gluster driver.
- Fix a memory leak in qemu_gluster_create().
- Proceed with glfs_zerofill() only if glfs_ftruncate() succeeds in
  qemu_gluster_create().


Bharata B Rao (3):
  gluster: Convert aio routines into coroutines
  gluster: Implement .bdrv_co_write_zeroes for gluster
  gluster: Add support for creating zero-filled image

 block/gluster.c | 318 +++++++++++++++++++++++++++++---------------------------
 configure       |   8 ++
 2 files changed, 175 insertions(+), 151 deletions(-)

-- 
1.7.11.7