qemu-block: deprecated/defunct, remove from tree

qemu-block xlator is not used by anyone, or so I'm told.

It's also substantially out of date. There's little reason to keep
it in our sources. (And FedoraProject doesn't like bundled software
either.)

Change-Id: I4aeb2fdfd962ec6d93de6bae126874121272220a
Signed-off-by: Kaleb S KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/13473
Smoke: Gluster Build System <jenkins@build.gluster.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>

13 files changed, 2 insertions, 2759 deletions

diff --git a/xlators/features/Makefile.am b/xlators/features/Makefile.am
index 649d9d8e9fa..3543ce7a465 100644
--- a/xlators/features/Makefile.am
+++ b/xlators/features/Makefile.am
@@ -1,6 +1,6 @@
 SUBDIRS = locks quota read-only mac-compat quiesce marker index barrier \
 	  arbiter protect compress changelog changetimerecorder ganesha \
-	  gfid-access $(GLUPY_SUBDIR) qemu-block upcall snapview-client \
-	  snapview-server trash shard bit-rot
+	  gfid-access $(GLUPY_SUBDIR) upcall snapview-client snapview-server \
+	  trash shard bit-rot
 
 CLEANFILES =
diff --git a/xlators/features/qemu-block/Makefile.am b/xlators/features/qemu-block/Makefile.am
deleted file mode 100644
index af437a64d6d..00000000000
--- a/xlators/features/qemu-block/Makefile.am
+++ /dev/null
@@ -1 +0,0 @@
-SUBDIRS = src
diff --git a/xlators/features/qemu-block/src/Makefile.am b/xlators/features/qemu-block/src/Makefile.am
deleted file mode 100644
index e32fc54605b..00000000000
--- a/xlators/features/qemu-block/src/Makefile.am
+++ /dev/null
@@ -1,156 +0,0 @@
-if ENABLE_QEMU_BLOCK
-xlator_LTLIBRARIES = qemu-block.la
-xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
-
-qemu_block_la_LDFLAGS = -module -avoid-version
-qemu_block_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
-	$(GLIB_LIBS) $(ZLIB_LIBS)
-
-qemu_block_la_SOURCES_qemu = \
-	$(CONTRIBDIR)/qemu/qemu-coroutine.c \
-	$(CONTRIBDIR)/qemu/qemu-coroutine-lock.c \
-	$(CONTRIBDIR)/qemu/qemu-coroutine-sleep.c \
-	$(CONTRIBDIR)/qemu/coroutine-ucontext.c \
-	$(CONTRIBDIR)/qemu/block.c \
-	$(CONTRIBDIR)/qemu/nop-symbols.c
-
-qemu_block_la_SOURCES_qemu_util = \
-	$(CONTRIBDIR)/qemu/util/aes.c \
-	$(CONTRIBDIR)/qemu/util/bitmap.c \
-	$(CONTRIBDIR)/qemu/util/bitops.c \
-	$(CONTRIBDIR)/qemu/util/cutils.c \
-	$(CONTRIBDIR)/qemu/util/error.c \
-	$(CONTRIBDIR)/qemu/util/hbitmap.c \
-	$(CONTRIBDIR)/qemu/util/iov.c \
-	$(CONTRIBDIR)/qemu/util/module.c \
-	$(CONTRIBDIR)/qemu/util/oslib-posix.c \
-	$(CONTRIBDIR)/qemu/util/qemu-option.c \
-	$(CONTRIBDIR)/qemu/util/qemu-error.c \
-	$(CONTRIBDIR)/qemu/util/qemu-thread-posix.c \
-	$(CONTRIBDIR)/qemu/util/unicode.c \
-	$(CONTRIBDIR)/qemu/util/hexdump.c
-
-qemu_block_la_SOURCES_qemu_block = \
-	$(CONTRIBDIR)/qemu/block/snapshot.c \
-	$(CONTRIBDIR)/qemu/block/qcow2-cache.c \
-	$(CONTRIBDIR)/qemu/block/qcow2-cluster.c \
-	$(CONTRIBDIR)/qemu/block/qcow2-refcount.c \
-	$(CONTRIBDIR)/qemu/block/qcow2-snapshot.c \
-	$(CONTRIBDIR)/qemu/block/qcow2.c \
-	$(CONTRIBDIR)/qemu/block/qed-check.c \
-	$(CONTRIBDIR)/qemu/block/qed-cluster.c \
-	$(CONTRIBDIR)/qemu/block/qed-gencb.c \
-	$(CONTRIBDIR)/qemu/block/qed-l2-cache.c \
-	$(CONTRIBDIR)/qemu/block/qed-table.c \
-	$(CONTRIBDIR)/qemu/block/qed.c
-
-qemu_block_la_SOURCES_qemu_qobject = \
-	$(CONTRIBDIR)/qemu/qobject/json-lexer.c \
-	$(CONTRIBDIR)/qemu/qobject/json-parser.c \
-	$(CONTRIBDIR)/qemu/qobject/json-streamer.c \
-	$(CONTRIBDIR)/qemu/qobject/qbool.c \
-	$(CONTRIBDIR)/qemu/qobject/qdict.c \
-	$(CONTRIBDIR)/qemu/qobject/qerror.c \
-	$(CONTRIBDIR)/qemu/qobject/qfloat.c \
-	$(CONTRIBDIR)/qemu/qobject/qint.c \
-	$(CONTRIBDIR)/qemu/qobject/qjson.c \
-	$(CONTRIBDIR)/qemu/qobject/qlist.c \
-	$(CONTRIBDIR)/qemu/qobject/qstring.c
-
-qemu_block_la_SOURCES = \
-	$(qemu_block_la_SOURCES_qemu) \
-	$(qemu_block_la_SOURCES_qemu_util) \
-	$(qemu_block_la_SOURCES_qemu_block) \
-	$(qemu_block_la_SOURCES_qemu_qobject) \
-	bdrv-xlator.c \
-	coroutine-synctask.c \
-	bh-syncop.c \
-	monitor-logging.c \
-	clock-timer.c \
-	qemu-block.c \
-	qb-coroutines.c
-
-noinst_HEADERS_qemu = \
-	$(CONTRIBDIR)/qemu/config-host.h \
-	$(CONTRIBDIR)/qemu/qapi-types.h \
-	$(CONTRIBDIR)/qemu/qmp-commands.h \
-	$(CONTRIBDIR)/qemu/trace/generated-tracers.h \
-	$(CONTRIBDIR)/qemu/include/config.h \
-	$(CONTRIBDIR)/qemu/include/glib-compat.h \
-	$(CONTRIBDIR)/qemu/include/qemu-common.h \
-	$(CONTRIBDIR)/qemu/include/trace.h \
-	$(CONTRIBDIR)/qemu/include/block/coroutine.h \
-	$(CONTRIBDIR)/qemu/include/block/aio.h \
-	$(CONTRIBDIR)/qemu/include/block/block.h \
-	$(CONTRIBDIR)/qemu/include/block/block_int.h \
-	$(CONTRIBDIR)/qemu/include/block/blockjob.h \
-	$(CONTRIBDIR)/qemu/include/block/coroutine.h \
-	$(CONTRIBDIR)/qemu/include/block/coroutine_int.h \
-	$(CONTRIBDIR)/qemu/include/block/snapshot.h \
-	$(CONTRIBDIR)/qemu/include/exec/cpu-common.h \
-	$(CONTRIBDIR)/qemu/include/exec/hwaddr.h \
-	$(CONTRIBDIR)/qemu/include/exec/poison.h \
-	$(CONTRIBDIR)/qemu/include/fpu/softfloat.h \
-	$(CONTRIBDIR)/qemu/include/migration/migration.h \
-	$(CONTRIBDIR)/qemu/include/migration/qemu-file.h \
-	$(CONTRIBDIR)/qemu/include/migration/vmstate.h \
-	$(CONTRIBDIR)/qemu/include/monitor/monitor.h \
-	$(CONTRIBDIR)/qemu/include/monitor/readline.h \
-	$(CONTRIBDIR)/qemu/include/qapi/error.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/json-lexer.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/json-parser.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/json-streamer.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qbool.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qdict.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qerror.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qfloat.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qint.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qjson.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qlist.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qobject.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/qstring.h \
-	$(CONTRIBDIR)/qemu/include/qapi/qmp/types.h \
-	$(CONTRIBDIR)/qemu/include/qemu/aes.h \
-	$(CONTRIBDIR)/qemu/include/qemu/atomic.h \
-	$(CONTRIBDIR)/qemu/include/qemu/bitmap.h \
-	$(CONTRIBDIR)/qemu/include/qemu/bitops.h \
-	$(CONTRIBDIR)/qemu/include/qemu/bswap.h \
-	$(CONTRIBDIR)/qemu/include/qemu/compiler.h \
-	$(CONTRIBDIR)/qemu/include/qemu/error-report.h \
-	$(CONTRIBDIR)/qemu/include/qemu/event_notifier.h \
-	$(CONTRIBDIR)/qemu/include/qemu/hbitmap.h \
-	$(CONTRIBDIR)/qemu/include/qemu/host-utils.h \
-	$(CONTRIBDIR)/qemu/include/qemu/iov.h \
-	$(CONTRIBDIR)/qemu/include/qemu/main-loop.h \
-	$(CONTRIBDIR)/qemu/include/qemu/module.h \
-	$(CONTRIBDIR)/qemu/include/qemu/notify.h \
-	$(CONTRIBDIR)/qemu/include/qemu/option.h \
-	$(CONTRIBDIR)/qemu/include/qemu/option_int.h \
-	$(CONTRIBDIR)/qemu/include/qemu/osdep.h \
-	$(CONTRIBDIR)/qemu/include/qemu/queue.h \
-	$(CONTRIBDIR)/qemu/include/qemu/sockets.h \
-	$(CONTRIBDIR)/qemu/include/qemu/thread-posix.h \
-	$(CONTRIBDIR)/qemu/include/qemu/thread.h \
-	$(CONTRIBDIR)/qemu/include/qemu/timer.h \
-	$(CONTRIBDIR)/qemu/include/qemu/typedefs.h \
-	$(CONTRIBDIR)/qemu/include/sysemu/sysemu.h \
-	$(CONTRIBDIR)/qemu/include/sysemu/os-posix.h \
-	$(CONTRIBDIR)/qemu/block/qcow2.h \
-	$(CONTRIBDIR)/qemu/block/qed.h
-
-noinst_HEADERS = \
-	$(noinst_HEADERS_qemu) \
-	qemu-block.h \
-	qemu-block-memory-types.h \
-	qb-coroutines.h
-
-AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src \
-            -I$(CONTRIBDIR)/qemu \
-            -I$(CONTRIBDIR)/qemu/include \
-            -DGLUSTER_XLATOR
-
-AM_CFLAGS = -fno-strict-aliasing -Wall $(GF_CFLAGS) $(GLIB_CFLAGS)
-
-CLEANFILES =
-
-endif
diff --git a/xlators/features/qemu-block/src/bdrv-xlator.c b/xlators/features/qemu-block/src/bdrv-xlator.c
deleted file mode 100644
index dcb8304712d..00000000000
--- a/xlators/features/qemu-block/src/bdrv-xlator.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "inode.h"
-#include "syncop.h"
-#include "qemu-block.h"
-#include "block/block_int.h"
-
-typedef struct BDRVGlusterState {
-	inode_t *inode;
-} BDRVGlusterState;
-
-static QemuOptsList runtime_opts = {
-	.name = "gluster",
-	.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
-	.desc = {
-		{
-			.name = "filename",
-			.type = QEMU_OPT_STRING,
-			.help = "GFID of file",
-		},
-		{ /* end of list */ }
-	},
-};
-
-inode_t *
-qb_inode_from_filename (const char *filename)
-{
-	const char *iptr = NULL;
-	inode_t *inode = NULL;
-
-	iptr = filename + 17;
-	sscanf (iptr, "%p", &inode);
-
-	return inode;
-}
-
-
-int
-qb_inode_to_filename (inode_t *inode, char *filename, int size)
-{
-	return snprintf (filename, size, "gluster://inodep:%p", inode);
-}
-
-
-static fd_t *
-fd_from_bs (BlockDriverState *bs)
-{
-	BDRVGlusterState *s = bs->opaque;
-
-	return fd_anonymous (s->inode);
-}
-
-
-static int
-qemu_gluster_open (BlockDriverState *bs, QDict *options, int bdrv_flags)
-{
-	inode_t *inode = NULL;
-	BDRVGlusterState *s = bs->opaque;
-	QemuOpts *opts = NULL;
-	Error *local_err = NULL;
-	const char *filename = NULL;
-	char gfid_str[128];
-	int ret;
-	qb_conf_t *conf = THIS->private;
-
-	opts = qemu_opts_create_nofail(&runtime_opts);
-	qemu_opts_absorb_qdict(opts, options, &local_err);
-	if (error_is_set(&local_err)) {
-		qerror_report_err(local_err);
-		error_free(local_err);
-		return -EINVAL;
-	}
-
-	filename = qemu_opt_get(opts, "filename");
-
-	/*
-	 * gfid:<gfid> format means we're opening a backing image.
-	 */
-	ret = sscanf(filename, "gluster://gfid:%s", gfid_str);
-	if (ret) {
-		loc_t loc = {0,};
-		struct iatt buf = {0,};
-		uuid_t gfid;
-
-		gf_uuid_parse(gfid_str, gfid);
-
-		loc.inode = inode_find(conf->root_inode->table, gfid);
-		if (!loc.inode) {
-			loc.inode = inode_new(conf->root_inode->table);
-			gf_uuid_copy(loc.inode->gfid, gfid);
-		}
-
-		gf_uuid_copy(loc.gfid, loc.inode->gfid);
-		ret = syncop_lookup(FIRST_CHILD(THIS), &loc, &buf, NULL,
-                                    NULL, NULL);
-		if (ret) {
-			loc_wipe(&loc);
-			return ret;
-		}
-
-		s->inode = inode_ref(loc.inode);
-		loc_wipe(&loc);
-	} else {
-		inode = qb_inode_from_filename (filename);
-		if (!inode)
-			return -EINVAL;
-
-		s->inode = inode_ref(inode);
-	}
-
-	return 0;
-}
-
-
-static int
-qemu_gluster_create (const char *filename, QEMUOptionParameter *options)
-{
-	uint64_t total_size = 0;
-	inode_t *inode = NULL;
-	fd_t *fd = NULL;
-	struct iatt stat = {0, };
-	int ret = 0;
-
-	inode = qb_inode_from_filename (filename);
-	if (!inode)
-		return -EINVAL;
-
-	while (options && options->name) {
-		if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-			total_size = options->value.n / BDRV_SECTOR_SIZE;
-		}
-		options++;
-	}
-
-	fd = fd_anonymous (inode);
-	if (!fd)
-		return -ENOMEM;
-
-	ret = syncop_fstat (FIRST_CHILD(THIS), fd, &stat, NULL, NULL);
-	if (ret) {
-		fd_unref (fd);
-		return ret;
-	}
-
-	if (stat.ia_size) {
-		/* format ONLY if the filesize is 0 bytes */
-		fd_unref (fd);
-		return -EFBIG;
-	}
-
-	if (total_size) {
-		ret = syncop_ftruncate (FIRST_CHILD(THIS), fd, total_size,
-                                        NULL, NULL);
-		if (ret) {
-			fd_unref (fd);
-			return ret;
-		}
-	}
-
-	fd_unref (fd);
-	return 0;
-}
-
-
-static int
-qemu_gluster_co_readv (BlockDriverState *bs, int64_t sector_num, int nb_sectors,
-		       QEMUIOVector *qiov)
-{
-	fd_t *fd = NULL;
-	off_t offset = 0;
-	size_t size = 0;
-	struct iovec *iov = NULL;
-	int count = 0;
-	struct iobref *iobref = NULL;
-	int ret = 0;
-
-	fd = fd_from_bs (bs);
-	if (!fd)
-		return -EIO;
-
-	offset = sector_num * BDRV_SECTOR_SIZE;
-	size = nb_sectors * BDRV_SECTOR_SIZE;
-
-	ret = syncop_readv (FIRST_CHILD(THIS), fd, size, offset, 0,
-			    &iov, &count, &iobref, NULL, NULL);
-	if (ret < 0)
-		goto out;
-
-	iov_copy (qiov->iov, qiov->niov, iov, count); /* *choke!* */
-
-out:
-	GF_FREE (iov);
-	if (iobref)
-		iobref_unref (iobref);
-	fd_unref (fd);
-	return ret;
-}
-
-
-static int
-qemu_gluster_co_writev (BlockDriverState *bs, int64_t sector_num, int nb_sectors,
-			QEMUIOVector *qiov)
-{
-	fd_t *fd = NULL;
-	off_t offset = 0;
-	size_t size = 0;
-	struct iobref *iobref = NULL;
-	struct iobuf *iobuf = NULL;
-	struct iovec iov = {0, };
-	int ret = -ENOMEM;
-
-	fd = fd_from_bs (bs);
-	if (!fd)
-		return -EIO;
-
-	offset = sector_num * BDRV_SECTOR_SIZE;
-	size = nb_sectors * BDRV_SECTOR_SIZE;
-
-	iobuf = iobuf_get2 (THIS->ctx->iobuf_pool, size);
-	if (!iobuf)
-		goto out;
-
-	iobref = iobref_new ();
-	if (!iobref) {
-		goto out;
-	}
-
-	iobref_add (iobref, iobuf);
-
-	iov_unload (iobuf_ptr (iobuf), qiov->iov, qiov->niov); /* *choke!* */
-
-	iov.iov_base = iobuf_ptr (iobuf);
-	iov.iov_len = size;
-
-	ret = syncop_writev (FIRST_CHILD(THIS), fd, &iov, 1, offset, iobref, 0,
-                             NULL, NULL);
-
-out:
-	if (iobuf)
-		iobuf_unref (iobuf);
-	if (iobref)
-		iobref_unref (iobref);
-	fd_unref (fd);
-	return ret;
-}
-
-
-static int
-qemu_gluster_co_flush (BlockDriverState *bs)
-{
-	fd_t *fd = NULL;
-	int ret = 0;
-
-	fd = fd_from_bs (bs);
-
-	ret = syncop_flush (FIRST_CHILD(THIS), fd, NULL, NULL);
-
-	fd_unref (fd);
-
-	return ret;
-}
-
-
-static int
-qemu_gluster_co_fsync (BlockDriverState *bs)
-{
-	fd_t *fd = NULL;
-	int ret = 0;
-
-	fd = fd_from_bs (bs);
-
-	ret = syncop_fsync (FIRST_CHILD(THIS), fd, 0, NULL, NULL);
-
-	fd_unref (fd);
-
-	return ret;
-}
-
-
-static int
-qemu_gluster_truncate (BlockDriverState *bs, int64_t offset)
-{
-	fd_t *fd = NULL;
-	int ret = 0;
-
-	fd = fd_from_bs (bs);
-
-	ret = syncop_ftruncate (FIRST_CHILD(THIS), fd, offset, NULL, NULL);
-
-	fd_unref (fd);
-
-	return ret;
-}
-
-
-static int64_t
-qemu_gluster_getlength (BlockDriverState *bs)
-{
-	fd_t *fd = NULL;
-	int ret = 0;
-	struct iatt iatt = {0, };
-
-	fd = fd_from_bs (bs);
-
-	ret = syncop_fstat (FIRST_CHILD(THIS), fd, &iatt, NULL, NULL);
-	if (ret < 0)
-		return -1;
-
-	return iatt.ia_size;
-}
-
-
-static int64_t
-qemu_gluster_allocated_file_size (BlockDriverState *bs)
-{
-	fd_t *fd = NULL;
-	int ret = 0;
-	struct iatt iatt = {0, };
-
-	fd = fd_from_bs (bs);
-
-	ret = syncop_fstat (FIRST_CHILD(THIS), fd, &iatt, NULL, NULL);
-	if (ret < 0)
-		return -1;
-
-	return iatt.ia_blocks * 512;
-}
-
-
-static void
-qemu_gluster_close (BlockDriverState *bs)
-{
-	BDRVGlusterState *s = NULL;
-
-	s = bs->opaque;
-
-	inode_unref (s->inode);
-
-	return;
-}
-
-
-static QEMUOptionParameter qemu_gluster_create_options[] = {
-	{
-		.name = BLOCK_OPT_SIZE,
-		.type = OPT_SIZE,
-		.help = "Virtual disk size"
-	},
-	{ NULL }
-};
-
-
-static BlockDriver bdrv_gluster = {
-	.format_name                  = "gluster",
-	.protocol_name                = "gluster",
-	.instance_size                = sizeof(BDRVGlusterState),
-	.bdrv_file_open               = qemu_gluster_open,
-	.bdrv_close                   = qemu_gluster_close,
-	.bdrv_create                  = qemu_gluster_create,
-	.bdrv_getlength               = qemu_gluster_getlength,
-	.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
-	.bdrv_co_readv                = qemu_gluster_co_readv,
-	.bdrv_co_writev               = qemu_gluster_co_writev,
-	.bdrv_co_flush_to_os          = qemu_gluster_co_flush,
-	.bdrv_co_flush_to_disk        = qemu_gluster_co_fsync,
-	.bdrv_truncate                = qemu_gluster_truncate,
-	.create_options               = qemu_gluster_create_options,
-};
-
-
-static void bdrv_gluster_init(void)
-{
-	bdrv_register(&bdrv_gluster);
-}
-
-
-block_init(bdrv_gluster_init);
diff --git a/xlators/features/qemu-block/src/bh-syncop.c b/xlators/features/qemu-block/src/bh-syncop.c
deleted file mode 100644
index 4374b5abcee..00000000000
--- a/xlators/features/qemu-block/src/bh-syncop.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "syncop.h"
-#include "qemu-block-memory-types.h"
-
-#include "block/aio.h"
-
-void
-qemu_bh_schedule (QEMUBH *bh)
-{
-	return;
-}
-
-void
-qemu_bh_cancel (QEMUBH *bh)
-{
-	return;
-}
-
-void
-qemu_bh_delete (QEMUBH *bh)
-{
-
-}
-
-QEMUBH *
-qemu_bh_new (QEMUBHFunc *cb, void *opaque)
-{
-	return NULL;
-}
diff --git a/xlators/features/qemu-block/src/clock-timer.c b/xlators/features/qemu-block/src/clock-timer.c
deleted file mode 100644
index 36c08a2e766..00000000000
--- a/xlators/features/qemu-block/src/clock-timer.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "syncop.h"
-#include "qemu-block-memory-types.h"
-
-#include "qemu/timer.h"
-
-QEMUClock *vm_clock;
-int use_rt_clock = 0;
-
-QEMUTimer *qemu_new_timer (QEMUClock *clock, int scale,
-			   QEMUTimerCB *cb, void *opaque)
-{
-	return NULL;
-}
-
-int64_t qemu_get_clock_ns (QEMUClock *clock)
-{
-	return 0;
-}
-
-void qemu_mod_timer (QEMUTimer *ts, int64_t expire_time)
-{
-	return;
-}
-
-void qemu_free_timer (QEMUTimer *ts)
-{
-
-}
-
-void qemu_del_timer (QEMUTimer *ts)
-{
-
-}
-
-bool qemu_aio_wait()
-{
-	synctask_wake (synctask_get());
-	synctask_yield (synctask_get());
-	return 0;
-}
diff --git a/xlators/features/qemu-block/src/coroutine-synctask.c b/xlators/features/qemu-block/src/coroutine-synctask.c
deleted file mode 100644
index d7d43831af4..00000000000
--- a/xlators/features/qemu-block/src/coroutine-synctask.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "syncop.h"
-#include "qemu-block-memory-types.h"
-
-#include "qemu-block.h"
-
-/*
- * This code serves as the bridge from the main glusterfs context to the qemu
- * coroutine context via synctask. We create a single threaded syncenv with a
- * single synctask responsible for processing a queue of coroutines. The qemu
- * code invoked from within the synctask function handlers uses the ucontext
- * coroutine implementation and scheduling logic internal to qemu. This
- * effectively donates a thread of execution to qemu and its internal coroutine
- * management.
- *
- * NOTE: The existence of concurrent synctasks has proven quite racy with regard
- * to qemu coroutine management, particularly related to the lifecycle
- * differences with top-level synctasks and internally created coroutines and
- * interactions with qemu-internal queues (and locks, in turn). We explicitly
- * disallow this scenario, via the queue, until it is more well supported.
- */
-
-static struct {
-	struct list_head	queue;
-	gf_lock_t		lock;
-	struct synctask		*task;
-} qb_co;
-
-static void
-init_qbco()
-{
-	INIT_LIST_HEAD(&qb_co.queue);
-	LOCK_INIT(&qb_co.lock);
-}
-
-static int
-synctask_nop_cbk (int ret, call_frame_t *frame, void *opaque)
-{
-	return 0;
-}
-
-static int
-qb_synctask_wrap (void *opaque)
-{
-	qb_local_t *qb_local, *tmp;
-
-	LOCK(&qb_co.lock);
-
-	while (!list_empty(&qb_co.queue)) {
-		list_for_each_entry_safe(qb_local, tmp, &qb_co.queue, list) {
-			list_del_init(&qb_local->list);
-			break;
-		}
-
-		UNLOCK(&qb_co.lock);
-
-		qb_local->synctask_fn(qb_local);
-		/* qb_local is now unwound and gone! */
-
-		LOCK(&qb_co.lock);
-	}
-
-	qb_co.task = NULL;
-
-	UNLOCK(&qb_co.lock);
-
-	return 0;
-}
-
-int
-qb_coroutine (call_frame_t *frame, synctask_fn_t fn)
-{
-	qb_local_t *qb_local = NULL;
-	qb_conf_t *qb_conf = NULL;
-	static int init = 0;
-
-	qb_local = frame->local;
-	qb_local->synctask_fn = fn;
-	qb_conf = frame->this->private;
-
-	if (!init) {
-		init = 1;
-		init_qbco();
-	}
-
-	LOCK(&qb_co.lock);
-
-	if (!qb_co.task)
-		qb_co.task = synctask_create(qb_conf->env, 0, qb_synctask_wrap,
-					     synctask_nop_cbk, frame, NULL);
-
-	list_add_tail(&qb_local->list, &qb_co.queue);
-
-	UNLOCK(&qb_co.lock);
-
-	return 0;
-}
diff --git a/xlators/features/qemu-block/src/monitor-logging.c b/xlators/features/qemu-block/src/monitor-logging.c
deleted file mode 100644
index c4dc12c1d5e..00000000000
--- a/xlators/features/qemu-block/src/monitor-logging.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "qemu-block-memory-types.h"
-
-#include "block/block_int.h"
-
-Monitor *cur_mon;
-
-int
-monitor_cur_is_qmp()
-{
-	/* No QMP support here */
-	return 0;
-}
-
-void
-monitor_set_error (Monitor *mon, QError *qerror)
-{
-	/* NOP here */
-	return;
-}
-
-
-void
-monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
-{
-	char buf[4096];
-
-	vsnprintf(buf, sizeof(buf), fmt, ap);
-
-	gf_log (THIS->name, GF_LOG_ERROR, "%s", buf);
-}
diff --git a/xlators/features/qemu-block/src/qb-coroutines.c b/xlators/features/qemu-block/src/qb-coroutines.c
deleted file mode 100644
index 0c2fa62bb4f..00000000000
--- a/xlators/features/qemu-block/src/qb-coroutines.c
+++ /dev/null
@@ -1,662 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "inode.h"
-#include "call-stub.h"
-#include "defaults.h"
-#include "qemu-block-memory-types.h"
-#include "qemu-block.h"
-#include "qb-coroutines.h"
-
-
-int
-qb_format_and_resume (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	char filename[64];
-	char base_filename[128];
-	int use_base = 0;
-	qb_inode_t *qb_inode = NULL;
-	Error *local_err = NULL;
-	fd_t *fd = NULL;
-	dict_t *xattr = NULL;
-	qb_conf_t *qb_conf = NULL;
-	int ret = -1;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-	qb_conf = frame->this->private;
-
-	qb_inode_to_filename (inode, filename, 64);
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-
-	/*
-	 * See if the caller specified a backing image.
-	 */
-	if (!gf_uuid_is_null(qb_inode->backing_gfid) || qb_inode->backing_fname) {
-		loc_t loc = {0,};
-		char gfid_str[64];
-		struct iatt buf;
-
-		if (!gf_uuid_is_null(qb_inode->backing_gfid)) {
-			loc.inode = inode_find(qb_conf->root_inode->table,
-					qb_inode->backing_gfid);
-			if (!loc.inode) {
-				loc.inode = inode_new(qb_conf->root_inode->table);
-				gf_uuid_copy(loc.inode->gfid,
-					qb_inode->backing_gfid);
-			}
-			gf_uuid_copy(loc.gfid, loc.inode->gfid);
-		} else if (qb_inode->backing_fname) {
-			loc.inode = inode_new(qb_conf->root_inode->table);
-			loc.name = qb_inode->backing_fname;
-			loc.parent = inode_parent(inode, NULL, NULL);
-			loc_path(&loc, loc.name);
-		}
-
-		/*
-		 * Lookup the backing image. Verify existence and/or get the
-		 * gfid if we don't already have it.
-		 */
-		ret = syncop_lookup(FIRST_CHILD(frame->this), &loc, &buf, NULL,
-                                    NULL, NULL);
-		GF_FREE(qb_inode->backing_fname);
-		if (ret) {
-			loc_wipe(&loc);
-			ret = -ret;
-			goto err;
-		}
-
-		gf_uuid_copy(qb_inode->backing_gfid, buf.ia_gfid);
-		loc_wipe(&loc);
-
-		/*
-		 * We pass the filename of the backing image into the qemu block
-		 * subsystem as the associated gfid. This is embedded into the
-		 * clone image and passed along to the gluster bdrv backend when
-		 * the block subsystem needs to operate on the backing image on
-		 * behalf of the clone.
-		 */
-		gf_uuid_unparse(qb_inode->backing_gfid, gfid_str);
-		snprintf(base_filename, sizeof(base_filename),
-			 "gluster://gfid:%s", gfid_str);
-		use_base = 1;
-	}
-
-	bdrv_img_create (filename, qb_inode->fmt,
-			 use_base ? base_filename : NULL, 0, 0, qb_inode->size,
-			 0, &local_err, true);
-
-	if (error_is_set (&local_err)) {
-		gf_log (frame->this->name, GF_LOG_ERROR, "%s",
-			error_get_pretty (local_err));
-		error_free (local_err);
-		QB_STUB_UNWIND (stub, -1, EIO);
-		return 0;
-	}
-
-	fd = fd_anonymous (inode);
-	if (!fd) {
-		gf_log (frame->this->name, GF_LOG_ERROR,
-			"could not create anonymous fd for %s",
-			uuid_utoa (inode->gfid));
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		return 0;
-	}
-
-	xattr = dict_new ();
-	if (!xattr) {
-		gf_log (frame->this->name, GF_LOG_ERROR,
-			"could not allocate xattr dict for %s",
-			uuid_utoa (inode->gfid));
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		fd_unref (fd);
-		return 0;
-	}
-
-	ret = dict_set_str (xattr, qb_conf->qb_xattr_key, local->fmt);
-	if (ret) {
-		gf_log (frame->this->name, GF_LOG_ERROR,
-			"could not dict_set for %s",
-			uuid_utoa (inode->gfid));
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		fd_unref (fd);
-		dict_unref (xattr);
-		return 0;
-	}
-
-	ret = syncop_fsetxattr (FIRST_CHILD(THIS), fd, xattr, 0, NULL, NULL);
-	if (ret) {
-		gf_log (frame->this->name, GF_LOG_ERROR,
-			"failed to setxattr for %s",
-			uuid_utoa (inode->gfid));
-		QB_STUB_UNWIND (stub, -1, -ret);
-		fd_unref (fd);
-		dict_unref (xattr);
-		return 0;
-	}
-
-	fd_unref (fd);
-	dict_unref (xattr);
-
-	QB_STUB_UNWIND (stub, 0, 0);
-
-	return 0;
-
-err:
-	QB_STUB_UNWIND(stub, -1, ret);
-	return 0;
-}
-
-
-static BlockDriverState *
-qb_bs_create (inode_t *inode, const char *fmt)
-{
-	char filename[64];
-	BlockDriverState *bs = NULL;
-	BlockDriver *drv = NULL;
-	int op_errno = 0;
-	int ret = 0;
-
-	bs = bdrv_new (uuid_utoa (inode->gfid));
-	if (!bs) {
-		op_errno = ENOMEM;
-		gf_log (THIS->name, GF_LOG_ERROR,
-			"could not allocate @bdrv for gfid:%s",
-			uuid_utoa (inode->gfid));
-		goto err;
-	}
-
-	drv = bdrv_find_format (fmt);
-	if (!drv) {
-		op_errno = EINVAL;
-		gf_log (THIS->name, GF_LOG_ERROR,
-			"Unknown file format: %s for gfid:%s",
-			fmt, uuid_utoa (inode->gfid));
-		goto err;
-	}
-
-	qb_inode_to_filename (inode, filename, 64);
-
-	ret = bdrv_open (bs, filename, NULL, BDRV_O_RDWR, drv);
-	if (ret < 0) {
-		op_errno = -ret;
-		gf_log (THIS->name, GF_LOG_ERROR,
-			"Unable to bdrv_open() gfid:%s (%s)",
-			uuid_utoa (inode->gfid), strerror (op_errno));
-		goto err;
-	}
-
-	return bs;
-err:
-	errno = op_errno;
-	return NULL;
-}
-
-
-int
-qb_co_open (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-	qb_inode->refcnt++;
-
-	QB_STUB_RESUME (stub);
-
-	return 0;
-}
-
-
-int
-qb_co_writev (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	QEMUIOVector qiov = {0, };
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	qemu_iovec_init_external (&qiov, stub->args.vector, stub->args.count);
-
-	ret = bdrv_pwritev (qb_inode->bs, stub->args.offset, &qiov);
-
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
-
-
-int
-qb_co_readv (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	struct iobuf *iobuf = NULL;
-	struct iobref *iobref = NULL;
-	struct iovec iov = {0, };
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	if (stub->args.offset >= qb_inode->size) {
-		QB_STUB_UNWIND (stub, 0, 0);
-		return 0;
-	}
-
-	iobuf = iobuf_get2 (frame->this->ctx->iobuf_pool, stub->args.size);
-	if (!iobuf) {
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		return 0;
-	}
-
-	iobref = iobref_new ();
-	if (!iobref) {
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		iobuf_unref (iobuf);
-		return 0;
-	}
-
-	if (iobref_add (iobref, iobuf) < 0) {
-		iobuf_unref (iobuf);
-		iobref_unref (iobref);
-		QB_STUB_UNWIND (stub, -1, ENOMEM);
-		return 0;
-	}
-
-	ret = bdrv_pread (qb_inode->bs, stub->args.offset, iobuf_ptr (iobuf),
-			  stub->args.size);
-
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-		iobref_unref (iobref);
-		return 0;
-	}
-
-	iov.iov_base = iobuf_ptr (iobuf);
-	iov.iov_len = ret;
-
-	stub->args_cbk.vector = iov_dup (&iov, 1);
-	stub->args_cbk.count = 1;
-	stub->args_cbk.iobref = iobref;
-
-	QB_STUB_UNWIND (stub, ret, 0);
-
-	return 0;
-}
-
-
-int
-qb_co_fsync (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	ret = bdrv_flush (qb_inode->bs);
-
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
-
-
-static void
-qb_update_size_xattr (xlator_t *this, fd_t *fd, const char *fmt, off_t offset)
-{
-	char val[QB_XATTR_VAL_MAX];
-	qb_conf_t *qb_conf = NULL;
-	dict_t *xattr = NULL;
-
-	qb_conf = this->private;
-
-	snprintf (val, QB_XATTR_VAL_MAX, "%s:%llu",
-		  fmt, (long long unsigned) offset);
-
-	xattr = dict_new ();
-	if (!xattr)
-		return;
-
-	if (dict_set_str (xattr, qb_conf->qb_xattr_key, val) != 0) {
-		dict_unref (xattr);
-		return;
-	}
-
-	syncop_fsetxattr (FIRST_CHILD(this), fd, xattr, 0, NULL, NULL);
-	dict_unref (xattr);
-}
-
-
-int
-qb_co_truncate (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	int ret = 0;
-	off_t offset = 0;
-	xlator_t *this = NULL;
-
-	this = THIS;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	ret = syncop_fstat (FIRST_CHILD(this), local->fd,
-                            &stub->args_cbk.prestat, NULL, NULL);
-        if (ret < 0)
-                goto out;
-	stub->args_cbk.prestat.ia_size = qb_inode->size;
-
-	ret = bdrv_truncate (qb_inode->bs, stub->args.offset);
-	if (ret < 0)
-		goto out;
-
-	offset = bdrv_getlength (qb_inode->bs);
-
-	qb_inode->size = offset;
-
-	ret = syncop_fstat (FIRST_CHILD(this), local->fd,
-                            &stub->args_cbk.poststat, NULL, NULL);
-        if (ret < 0)
-                goto out;
-	stub->args_cbk.poststat.ia_size = qb_inode->size;
-
-	qb_update_size_xattr (this, local->fd, qb_inode->fmt, qb_inode->size);
-
-out:
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
-
-
-int
-qb_co_close (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	BlockDriverState *bs = NULL;
-
-	local = opaque;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (THIS, inode);
-
-	if (!--qb_inode->refcnt) {
-		bs = qb_inode->bs;
-		qb_inode->bs = NULL;
-		bdrv_delete (bs);
-	}
-
-	frame = local->frame;
-	frame->local = NULL;
-	qb_local_free (THIS, local);
-	STACK_DESTROY (frame->root);
-
-	return 0;
-}
-
-
-int
-qb_snapshot_create (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	QEMUSnapshotInfo sn;
-	struct timeval tv = {0, };
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	memset (&sn, 0, sizeof (sn));
-        pstrcpy (sn.name, sizeof(sn.name), local->name);
-        gettimeofday (&tv, NULL);
-        sn.date_sec = tv.tv_sec;
-        sn.date_nsec = tv.tv_usec * 1000;
-
-        ret = bdrv_snapshot_create (qb_inode->bs, &sn);
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
-
-
-int
-qb_snapshot_delete (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	ret = bdrv_snapshot_delete (qb_inode->bs, local->name);
-
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
-
-
-int
-qb_snapshot_goto (void *opaque)
-{
-	qb_local_t *local = NULL;
-	call_frame_t *frame = NULL;
-	call_stub_t *stub = NULL;
-	inode_t *inode = NULL;
-	qb_inode_t *qb_inode = NULL;
-	int ret = 0;
-
-	local = opaque;
-	frame = local->frame;
-	stub = local->stub;
-	inode = local->inode;
-
-	qb_inode = qb_inode_ctx_get (frame->this, inode);
-	if (!qb_inode->bs) {
-		/* FIXME: we need locks around this when
-		   enabling multithreaded syncop/coroutine
-		   for qemu-block
-		*/
-
-		qb_inode->bs = qb_bs_create (inode, qb_inode->fmt);
-		if (!qb_inode->bs) {
-			QB_STUB_UNWIND (stub, -1, errno);
-			return 0;
-		}
-	}
-
-	ret = bdrv_snapshot_goto (qb_inode->bs, local->name);
-
-	if (ret < 0) {
-		QB_STUB_UNWIND (stub, -1, -ret);
-	} else {
-		QB_STUB_UNWIND (stub, ret, 0);
-	}
-
-	return 0;
-}
diff --git a/xlators/features/qemu-block/src/qb-coroutines.h b/xlators/features/qemu-block/src/qb-coroutines.h
deleted file mode 100644
index 583319f3b06..00000000000
--- a/xlators/features/qemu-block/src/qb-coroutines.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef __QB_COROUTINES_H
-#define __QB_COROUTINES_H
-
-#include "syncop.h"
-#include "call-stub.h"
-#include "block/block_int.h"
-#include "monitor/monitor.h"
-
-int qb_format_and_resume (void *opaque);
-int qb_snapshot_create (void *opaque);
-int qb_snapshot_delete (void *opaque);
-int qb_snapshot_goto (void *opaque);
-int qb_co_open (void *opaque);
-int qb_co_close (void *opaque);
-int qb_co_writev (void *opaque);
-int qb_co_readv (void *opaque);
-int qb_co_fsync (void *opaque);
-int qb_co_truncate (void *opaque);
-
-#endif /* __QB_COROUTINES_H */
diff --git a/xlators/features/qemu-block/src/qemu-block-memory-types.h b/xlators/features/qemu-block/src/qemu-block-memory-types.h
deleted file mode 100644
index 267b3893fed..00000000000
--- a/xlators/features/qemu-block/src/qemu-block-memory-types.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
-  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#ifndef __QB_MEM_TYPES_H__
-#define __QB_MEM_TYPES_H__
-
-#include "mem-types.h"
-
-enum gf_qb_mem_types_ {
-        gf_qb_mt_qb_conf_t   = gf_common_mt_end + 1,
-        gf_qb_mt_qb_inode_t,
-        gf_qb_mt_qb_local_t,
-	gf_qb_mt_coroutinesynctask_t,
-        gf_qb_mt_end
-};
-#endif
-
diff --git a/xlators/features/qemu-block/src/qemu-block.c b/xlators/features/qemu-block/src/qemu-block.c
deleted file mode 100644
index 9aa9f43ab19..00000000000
--- a/xlators/features/qemu-block/src/qemu-block.c
+++ /dev/null
@@ -1,1134 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-
-#include "glusterfs.h"
-#include "logging.h"
-#include "dict.h"
-#include "xlator.h"
-#include "inode.h"
-#include "call-stub.h"
-#include "defaults.h"
-#include "qemu-block-memory-types.h"
-#include "qemu-block.h"
-#include "qb-coroutines.h"
-
-
-qb_inode_t *
-__qb_inode_ctx_get (xlator_t *this, inode_t *inode)
-{
-        uint64_t    value    = 0;
-        qb_inode_t *qb_inode = NULL;
-
-        __inode_ctx_get (inode, this, &value);
-        qb_inode = (qb_inode_t *)(unsigned long) value;
-
-        return qb_inode;
-}
-
-
-qb_inode_t *
-qb_inode_ctx_get (xlator_t *this, inode_t *inode)
-{
-        qb_inode_t *qb_inode = NULL;
-
-        LOCK (&inode->lock);
-        {
-                qb_inode = __qb_inode_ctx_get (this, inode);
-        }
-        UNLOCK (&inode->lock);
-
-        return qb_inode;
-}
-
-
-qb_inode_t *
-qb_inode_ctx_del (xlator_t *this, inode_t *inode)
-{
-        uint64_t    value    = 0;
-        qb_inode_t *qb_inode = NULL;
-
-        inode_ctx_del (inode, this, &value);
-        qb_inode = (qb_inode_t *)(unsigned long) value;
-
-        return qb_inode;
-}
-
-
-int
-qb_inode_cleanup (xlator_t *this, inode_t *inode, int warn)
-{
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_del (this, inode);
-
-	if (!qb_inode)
-		return 0;
-
-	if (warn)
-		gf_log (this->name, GF_LOG_WARNING,
-			"inode %s no longer block formatted",
-			uuid_utoa (inode->gfid));
-
-	/* free (qb_inode->bs); */
-
-	GF_FREE (qb_inode);
-
-	return 0;
-}
-
-
-int
-qb_iatt_fixup (xlator_t *this, inode_t *inode, struct iatt *iatt)
-{
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, inode);
-	if (!qb_inode)
-		return 0;
-
-	iatt->ia_size = qb_inode->size;
-
-	return 0;
-}
-
-
-int
-qb_format_extract (xlator_t *this, char *format, inode_t *inode)
-{
-	char       *s, *save;
-	uint64_t    size = 0;
-	char        fmt[QB_XATTR_VAL_MAX+1] = {0, };
-	qb_inode_t *qb_inode = NULL;
-	char *formatstr = NULL;
-	uuid_t gfid = {0,};
-	char gfid_str[64] = {0,};
-	int ret;
-
-	strncpy(fmt, format, QB_XATTR_VAL_MAX);
-
-	s = strtok_r(fmt, ":", &save);
-	if (!s)
-		goto invalid;
-	formatstr = gf_strdup(s);
-
-	s = strtok_r(NULL, ":", &save);
-	if (!s)
-		goto invalid;
-	if (gf_string2bytesize (s, &size))
-		goto invalid;
-	if (!size)
-		goto invalid;
-
-	s = strtok_r(NULL, "\0", &save);
-	if (s && !strncmp(s, "<gfid:", strlen("<gfid:"))) {
-		/*
-		 * Check for valid gfid backing image specifier.
-		 */
-		if (strlen(s) + 1 > sizeof(gfid_str))
-			goto invalid;
-		ret = sscanf(s, "<gfid:%[^>]s", gfid_str);
-		if (ret == 1) {
-			ret = gf_uuid_parse(gfid_str, gfid);
-			if (ret < 0)
-				goto invalid;
-		}
-	}
-
-	qb_inode = qb_inode_ctx_get (this, inode);
-	if (!qb_inode)
-		qb_inode = GF_CALLOC (1, sizeof (*qb_inode),
-				      gf_qb_mt_qb_inode_t);
-	if (!qb_inode) {
-		GF_FREE(formatstr);
-		return ENOMEM;
-	}
-
-	strncpy(qb_inode->fmt, formatstr, QB_XATTR_VAL_MAX);
-	qb_inode->size = size;
-
-	/*
-	 * If a backing gfid was not specified, interpret any remaining bytes
-	 * associated with a backing image as a filename local to the parent
-	 * directory. The format processing will validate further.
-	 */
-	if (!gf_uuid_is_null(gfid))
-		gf_uuid_copy(qb_inode->backing_gfid, gfid);
-	else if (s)
-		qb_inode->backing_fname = gf_strdup(s);
-
-	inode_ctx_set (inode, this, (void *)&qb_inode);
-
-	GF_FREE(formatstr);
-
-	return 0;
-
-invalid:
-	GF_FREE(formatstr);
-
-	gf_log (this->name, GF_LOG_WARNING,
-		"invalid format '%s' in inode %s", format,
-		uuid_utoa (inode->gfid));
-	return EINVAL;
-}
-
-
-void
-qb_local_free (xlator_t *this, qb_local_t *local)
-{
-	if (local->inode)
-		inode_unref (local->inode);
-	if (local->fd)
-		fd_unref (local->fd);
-	GF_FREE (local);
-}
-
-
-int
-qb_local_init (call_frame_t *frame)
-{
-	qb_local_t *qb_local = NULL;
-
-	qb_local = GF_CALLOC (1, sizeof (*qb_local), gf_qb_mt_qb_local_t);
-	if (!qb_local)
-		return -1;
-	INIT_LIST_HEAD(&qb_local->list);
-
-	qb_local->frame = frame;
-	frame->local = qb_local;
-
-	return 0;
-}
-
-
-int
-qb_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	       int op_ret, int op_errno, inode_t *inode, struct iatt *buf,
-	       dict_t *xdata, struct iatt *postparent)
-{
-	char *format = NULL;
-	qb_conf_t *conf = NULL;
-
-	conf = this->private;
-
-	if (op_ret == -1)
-		goto out;
-
-	/*
-	 * Cache the root inode for dealing with backing images. The format
-	 * coroutine and the gluster qemu backend driver both use the root inode
-	 * table to verify and/or redirect I/O to the backing image via
-	 * anonymous fd's.
-	 */
-	if (!conf->root_inode && __is_root_gfid(inode->gfid))
-		conf->root_inode = inode_ref(inode);
-
-	if (!xdata)
-		goto out;
-
-	if (dict_get_str (xdata, conf->qb_xattr_key, &format))
-		goto out;
-
-	if (!format) {
-		qb_inode_cleanup (this, inode, 1);
-		goto out;
-	}
-
-	op_errno = qb_format_extract (this, format, inode);
-	if (op_errno)
-		op_ret = -1;
-
-	qb_iatt_fixup (this, inode, buf);
-out:
-	QB_STACK_UNWIND (lookup, frame, op_ret, op_errno, inode, buf,
-			 xdata, postparent);
-	return 0;
-}
-
-
-int
-qb_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-	qb_conf_t *conf = NULL;
-
-	conf = this->private;
-
-	xdata = xdata ? dict_ref (xdata) : dict_new ();
-
-	if (!xdata)
-		goto enomem;
-
-	if (dict_set_int32 (xdata, conf->qb_xattr_key, 0))
-		goto enomem;
-
-	STACK_WIND (frame, qb_lookup_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->lookup, loc, xdata);
-	dict_unref (xdata);
-	return 0;
-enomem:
-	QB_STACK_UNWIND (lookup, frame, -1, ENOMEM, 0, 0, 0, 0);
-	if (xdata)
-		dict_unref (xdata);
-	return 0;
-}
-
-
-int
-qb_setxattr_format (call_frame_t *frame, xlator_t *this, call_stub_t *stub,
-		    dict_t *xattr, inode_t *inode)
-{
-	char *format = NULL;
-	int op_errno = 0;
-	qb_local_t *qb_local = NULL;
-	data_t *data = NULL;
-	qb_inode_t *qb_inode;
-
-	if (!(data = dict_get (xattr, "trusted.glusterfs.block-format"))) {
-		QB_STUB_RESUME (stub);
-		return 0;
-	}
-
-	format = alloca (data->len + 1);
-	memcpy (format, data->data, data->len);
-	format[data->len] = 0;
-
-	op_errno = qb_format_extract (this, format, inode);
-	if (op_errno) {
-		QB_STUB_UNWIND (stub, -1, op_errno);
-		return 0;
-	}
-	qb_inode = qb_inode_ctx_get(this, inode);
-
-	qb_local = frame->local;
-
-	qb_local->stub = stub;
-	qb_local->inode = inode_ref (inode);
-
-	snprintf(qb_local->fmt, QB_XATTR_VAL_MAX, "%s:%" PRId64, qb_inode->fmt,
-		 qb_inode->size);
-
-	qb_coroutine (frame, qb_format_and_resume);
-
-	return 0;
-}
-
-
-int
-qb_setxattr_snapshot_create (call_frame_t *frame, xlator_t *this,
-			     call_stub_t *stub, dict_t *xattr, inode_t *inode)
-{
-	qb_local_t *qb_local = NULL;
-	char *name = NULL;
-	data_t *data = NULL;
-
-	if (!(data = dict_get (xattr, "trusted.glusterfs.block-snapshot-create"))) {
-		QB_STUB_RESUME (stub);
-		return 0;
-	}
-
-	name = alloca (data->len + 1);
-	memcpy (name, data->data, data->len);
-	name[data->len] = 0;
-
-	qb_local = frame->local;
-
-	qb_local->stub = stub;
-	qb_local->inode = inode_ref (inode);
-	strncpy (qb_local->name, name, 128);
-
-	qb_coroutine (frame, qb_snapshot_create);
-
-	return 0;
-}
-
-
-int
-qb_setxattr_snapshot_delete (call_frame_t *frame, xlator_t *this,
-			     call_stub_t *stub, dict_t *xattr, inode_t *inode)
-{
-	qb_local_t *qb_local = NULL;
-	char *name = NULL;
-	data_t *data = NULL;
-
-	if (!(data = dict_get (xattr, "trusted.glusterfs.block-snapshot-delete"))) {
-		QB_STUB_RESUME (stub);
-		return 0;
-	}
-
-	name = alloca (data->len + 1);
-	memcpy (name, data->data, data->len);
-	name[data->len] = 0;
-
-	qb_local = frame->local;
-
-	qb_local->stub = stub;
-	qb_local->inode = inode_ref (inode);
-	strncpy (qb_local->name, name, 128);
-
-	qb_coroutine (frame, qb_snapshot_delete);
-
-	return 0;
-}
-
-int
-qb_setxattr_snapshot_goto (call_frame_t *frame, xlator_t *this,
-			   call_stub_t *stub, dict_t *xattr, inode_t *inode)
-{
-	qb_local_t *qb_local = NULL;
-	char *name = NULL;
-	data_t *data = NULL;
-
-	if (!(data = dict_get (xattr, "trusted.glusterfs.block-snapshot-goto"))) {
-		QB_STUB_RESUME (stub);
-		return 0;
-	}
-
-	name = alloca (data->len + 1);
-	memcpy (name, data->data, data->len);
-	name[data->len] = 0;
-
-	qb_local = frame->local;
-
-	qb_local->stub = stub;
-	qb_local->inode = inode_ref (inode);
-	strncpy (qb_local->name, name, 128);
-
-	qb_coroutine (frame, qb_snapshot_goto);
-
-	return 0;
-}
-
-
-int
-qb_setxattr_common (call_frame_t *frame, xlator_t *this, call_stub_t *stub,
-		    dict_t *xattr, inode_t *inode)
-{
-
-	if (dict_get (xattr, "trusted.glusterfs.block-format")) {
-		qb_setxattr_format (frame, this, stub, xattr, inode);
-		return 0;
-	}
-
-	if (dict_get (xattr, "trusted.glusterfs.block-snapshot-create")) {
-		qb_setxattr_snapshot_create (frame, this, stub, xattr, inode);
-		return 0;
-	}
-
-	if (dict_get (xattr, "trusted.glusterfs.block-snapshot-delete")) {
-		qb_setxattr_snapshot_delete (frame, this, stub, xattr, inode);
-		return 0;
-	}
-
-	if (dict_get (xattr, "trusted.glusterfs.block-snapshot-goto")) {
-		qb_setxattr_snapshot_goto (frame, this, stub, xattr, inode);
-		return 0;
-	}
-
-	QB_STUB_RESUME (stub);
-
-	return 0;
-}
-
-
-int
-qb_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr,
-	     int flags, dict_t *xdata)
-{
-	call_stub_t *stub = NULL;
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	stub = fop_setxattr_stub (frame, default_setxattr_resume, loc, xattr,
-				  flags, xdata);
-	if (!stub)
-		goto enomem;
-
-	qb_setxattr_common (frame, this, stub, xattr, loc->inode);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (setxattr, frame, -1, ENOMEM, 0);
-	return 0;
-}
-
-
-int
-qb_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xattr,
-	      int flags, dict_t *xdata)
-{
-	call_stub_t *stub = NULL;
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	stub = fop_fsetxattr_stub (frame, default_fsetxattr_resume, fd, xattr,
-				   flags, xdata);
-	if (!stub)
-		goto enomem;
-
-	qb_setxattr_common (frame, this, stub, xattr, fd->inode);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (fsetxattr, frame, -1, ENOMEM, 0);
-	return 0;
-}
-
-
-int
-qb_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	     int op_ret, int op_errno, fd_t *fd, dict_t *xdata)
-{
-	call_stub_t *stub = NULL;
-	qb_local_t *qb_local = NULL;
-
-	qb_local = frame->local;
-
-	if (op_ret < 0)
-		goto unwind;
-
-	if (!qb_inode_ctx_get (this, qb_local->inode))
-		goto unwind;
-
-	stub = fop_open_cbk_stub (frame, NULL, op_ret, op_errno, fd, xdata);
-	if (!stub) {
-		op_ret = -1;
-		op_errno = ENOMEM;
-		goto unwind;
-	}
-
-	qb_local->stub = stub;
-
-	qb_coroutine (frame, qb_co_open);
-
-	return 0;
-unwind:
-	QB_STACK_UNWIND (open, frame, op_ret, op_errno, fd, xdata);
-	return 0;
-}
-
-
-int
-qb_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
-	 fd_t *fd, dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, loc->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_open_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->open, loc, flags, fd,
-			    xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (loc->inode);
-	qb_local->fd = fd_ref (fd);
-
-	STACK_WIND (frame, qb_open_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
-	return 0;
-enomem:
-	QB_STACK_UNWIND (open, frame, -1, ENOMEM, 0, 0);
-	return 0;
-}
-
-
-int
-qb_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
-	   int count, off_t offset, uint32_t flags, struct iobref *iobref,
-	   dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, fd->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_writev_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->writev, fd, vector, count,
-			    offset, flags, iobref, xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (fd->inode);
-	qb_local->fd = fd_ref (fd);
-
-	qb_local->stub = fop_writev_stub (frame, NULL, fd, vector, count,
-					  offset, flags, iobref, xdata);
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_writev);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (writev, frame, -1, ENOMEM, 0, 0, 0);
-	return 0;
-}
-
-
-int
-qb_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-	  off_t offset, uint32_t flags, dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, fd->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_readv_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->readv, fd, size, offset,
-			    flags, xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (fd->inode);
-	qb_local->fd = fd_ref (fd);
-
-	qb_local->stub = fop_readv_stub (frame, NULL, fd, size, offset,
-					  flags, xdata);
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_readv);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (readv, frame, -1, ENOMEM, 0, 0, 0, 0, 0);
-	return 0;
-}
-
-
-int
-qb_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int dsync,
-	  dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, fd->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_fsync_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->fsync, fd, dsync, xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (fd->inode);
-	qb_local->fd = fd_ref (fd);
-
-	qb_local->stub = fop_fsync_stub (frame, NULL, fd, dsync, xdata);
-
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_fsync);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (fsync, frame, -1, ENOMEM, 0, 0, 0);
-	return 0;
-}
-
-
-int
-qb_flush (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, fd->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_flush_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->flush, fd, xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (fd->inode);
-	qb_local->fd = fd_ref (fd);
-
-	qb_local->stub = fop_flush_stub (frame, NULL, fd, xdata);
-
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_fsync);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (flush, frame, -1, ENOMEM, 0);
-	return 0;
-}
-
-static int32_t
-qb_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-		int32_t op_ret, int32_t op_errno, gf_dirent_t *entries,
-		dict_t *xdata)
-{
-	qb_conf_t *conf = this->private;
-	gf_dirent_t *entry;
-	char *format;
-
-	list_for_each_entry(entry, &entries->list, list) {
-		if (!entry->inode || !entry->dict)
-			continue;
-
-		format = NULL;
-		if (dict_get_str(entry->dict, conf->qb_xattr_key, &format))
-			continue;
-
-		if (!format) {
-			qb_inode_cleanup(this, entry->inode, 1);
-			continue;
-		}
-
-		if (qb_format_extract(this, format, entry->inode))
-			continue;
-
-		qb_iatt_fixup(this, entry->inode, &entry->d_stat);
-	}
-
-	STACK_UNWIND_STRICT(readdirp, frame, op_ret, op_errno, entries, xdata);
-	return 0;
-}
-
-static int32_t
-qb_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-	    off_t off, dict_t *xdata)
-{
-	qb_conf_t *conf = this->private;
-
-	xdata = xdata ? dict_ref(xdata) : dict_new();
-	if (!xdata)
-		goto enomem;
-
-	if (dict_set_int32 (xdata, conf->qb_xattr_key, 0))
-		goto enomem;
-
-	STACK_WIND(frame, qb_readdirp_cbk, FIRST_CHILD(this),
-		   FIRST_CHILD(this)->fops->readdirp, fd, size, off, xdata);
-
-	dict_unref(xdata);
-	return 0;
-
-enomem:
-	QB_STACK_UNWIND(readdirp, frame, -1, ENOMEM, NULL, NULL);
-	if (xdata)
-		dict_unref(xdata);
-	return 0;
-}
-
-int
-qb_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
-	     dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, loc->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_truncate_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->truncate, loc, offset,
-			    xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (loc->inode);
-	qb_local->fd = fd_anonymous (loc->inode);
-
-	qb_local->stub = fop_truncate_stub (frame, NULL, loc, offset, xdata);
-
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_truncate);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (truncate, frame, -1, ENOMEM, 0, 0, 0);
-	return 0;
-}
-
-
-int
-qb_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-	     dict_t *xdata)
-{
-	qb_local_t *qb_local = NULL;
-	qb_inode_t *qb_inode = NULL;
-
-	qb_inode = qb_inode_ctx_get (this, fd->inode);
-	if (!qb_inode) {
-		STACK_WIND (frame, default_ftruncate_cbk, FIRST_CHILD(this),
-			    FIRST_CHILD(this)->fops->ftruncate, fd, offset,
-			    xdata);
-		return 0;
-	}
-
-	if (qb_local_init (frame) != 0)
-		goto enomem;
-
-	qb_local = frame->local;
-
-	qb_local->inode = inode_ref (fd->inode);
-	qb_local->fd = fd_ref (fd);
-
-	qb_local->stub = fop_ftruncate_stub (frame, NULL, fd, offset, xdata);
-
-	if (!qb_local->stub)
-		goto enomem;
-
-	qb_coroutine (frame, qb_co_truncate);
-
-	return 0;
-enomem:
-	QB_STACK_UNWIND (ftruncate, frame, -1, ENOMEM, 0, 0, 0);
-	return 0;
-}
-
-
-int
-qb_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	     int op_ret, int op_errno, struct iatt *iatt, dict_t *xdata)
-{
-	inode_t *inode = NULL;
-
-	inode = frame->local;
-	frame->local = NULL;
-
-	if (inode) {
-		qb_iatt_fixup (this, inode, iatt);
-		inode_unref (inode);
-	}
-
-	QB_STACK_UNWIND (stat, frame, op_ret, op_errno, iatt, xdata);
-
-	return 0;
-}
-
-int
-qb_stat (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-	if (qb_inode_ctx_get (this, loc->inode))
-		frame->local = inode_ref (loc->inode);
-
-	STACK_WIND (frame, qb_stat_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->stat, loc, xdata);
-	return 0;
-}
-
-
-int
-qb_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	      int op_ret, int op_errno, struct iatt *iatt, dict_t *xdata)
-{
-	inode_t *inode = NULL;
-
-	inode = frame->local;
-	frame->local = NULL;
-
-	if (inode) {
-		qb_iatt_fixup (this, inode, iatt);
-		inode_unref (inode);
-	}
-
-	QB_STACK_UNWIND (fstat, frame, op_ret, op_errno, iatt, xdata);
-
-	return 0;
-}
-
-
-int
-qb_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
-{
-	if (qb_inode_ctx_get (this, fd->inode))
-		frame->local = inode_ref (fd->inode);
-
-	STACK_WIND (frame, qb_fstat_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->fstat, fd, xdata);
-	return 0;
-}
-
-
-int
-qb_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		int op_ret, int op_errno, struct iatt *pre, struct iatt *post,
-		dict_t *xdata)
-{
-	inode_t *inode = NULL;
-
-	inode = frame->local;
-	frame->local = NULL;
-
-	if (inode) {
-		qb_iatt_fixup (this, inode, pre);
-		qb_iatt_fixup (this, inode, post);
-		inode_unref (inode);
-	}
-
-	QB_STACK_UNWIND (setattr, frame, op_ret, op_errno, pre, post, xdata);
-
-	return 0;
-}
-
-
-int
-qb_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *buf,
-	    int valid, dict_t *xdata)
-{
-	if (qb_inode_ctx_get (this, loc->inode))
-		frame->local = inode_ref (loc->inode);
-
-	STACK_WIND (frame, qb_setattr_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->setattr, loc, buf, valid, xdata);
-	return 0;
-}
-
-
-int
-qb_fsetattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		 int op_ret, int op_errno, struct iatt *pre, struct iatt *post,
-		 dict_t *xdata)
-{
-	inode_t *inode = NULL;
-
-	inode = frame->local;
-	frame->local = NULL;
-
-	if (inode) {
-		qb_iatt_fixup (this, inode, pre);
-		qb_iatt_fixup (this, inode, post);
-		inode_unref (inode);
-	}
-
-	QB_STACK_UNWIND (fsetattr, frame, op_ret, op_errno, pre, post, xdata);
-
-	return 0;
-}
-
-
-int
-qb_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *buf,
-	     int valid, dict_t *xdata)
-{
-	if (qb_inode_ctx_get (this, fd->inode))
-		frame->local = inode_ref (fd->inode);
-
-	STACK_WIND (frame, qb_setattr_cbk, FIRST_CHILD(this),
-		    FIRST_CHILD(this)->fops->fsetattr, fd, buf, valid, xdata);
-	return 0;
-}
-
-
-int
-qb_forget (xlator_t *this, inode_t *inode)
-{
-	return qb_inode_cleanup (this, inode, 0);
-}
-
-
-int
-qb_release (xlator_t *this, fd_t *fd)
-{
-	call_frame_t *frame = NULL;
-
-	frame = create_frame (this, this->ctx->pool);
-	if (!frame) {
-		gf_log (this->name, GF_LOG_ERROR,
-			"Could not allocate frame. "
-			"Leaking QEMU BlockDriverState");
-		return -1;
-	}
-
-	if (qb_local_init (frame) != 0) {
-		gf_log (this->name, GF_LOG_ERROR,
-			"Could not allocate local. "
-			"Leaking QEMU BlockDriverState");
-		STACK_DESTROY (frame->root);
-		return -1;
-	}
-
-	if (qb_coroutine (frame, qb_co_close) != 0) {
-		gf_log (this->name, GF_LOG_ERROR,
-			"Could not allocate coroutine. "
-			"Leaking QEMU BlockDriverState");
-		qb_local_free (this, frame->local);
-		frame->local = NULL;
-		STACK_DESTROY (frame->root);
-	}
-
-	return 0;
-}
-
-int
-mem_acct_init (xlator_t *this)
-{
-        int     ret = -1;
-
-        ret = xlator_mem_acct_init (this, gf_qb_mt_end + 1);
-
-        if (ret)
-                gf_log (this->name, GF_LOG_ERROR, "Memory accounting init "
-                        "failed");
-        return ret;
-}
-
-
-int
-reconfigure (xlator_t *this, dict_t *options)
-{
-	return 0;
-}
-
-
-int
-init (xlator_t *this)
-{
-        qb_conf_t *conf    = NULL;
-        int32_t    ret     = -1;
-	static int bdrv_inited = 0;
-
-        if (!this->children || this->children->next) {
-                gf_log (this->name, GF_LOG_ERROR,
-                        "FATAL: qemu-block (%s) not configured with exactly "
-                        "one child", this->name);
-                goto out;
-        }
-
-        conf = GF_CALLOC (1, sizeof (*conf), gf_qb_mt_qb_conf_t);
-        if (!conf)
-                goto out;
-
-        /* configure 'option window-size <size>' */
-        GF_OPTION_INIT ("default-password", conf->default_password, str, out);
-
-	/* qemu coroutines use "co_mutex" for synchronizing among themselves.
-	   However "co_mutex" itself is not threadsafe if the coroutine framework
-	   is multithreaded (which usually is not). However synctasks are
-	   fundamentally multithreaded, so for now create a syncenv which has
-	   scaling limits set to max 1 thread so that the qemu coroutines can
-	   execute "safely".
-
-	   Future work: provide an implementation of "co_mutex" which is
-	   threadsafe and use the global multithreaded ctx->env syncenv.
-	*/
-	conf->env = syncenv_new (0, 1, 1);
-
-        this->private = conf;
-
-        ret = 0;
-
-	snprintf (conf->qb_xattr_key, QB_XATTR_KEY_MAX, QB_XATTR_KEY_FMT,
-		  this->name);
-
-	cur_mon = (void *) 1;
-
-	if (!bdrv_inited) {
-		bdrv_init ();
-		bdrv_inited = 1;
-	}
-
-out:
-        if (ret)
-                GF_FREE (conf);
-
-        return ret;
-}
-
-
-void
-fini (xlator_t *this)
-{
-        qb_conf_t *conf = NULL;
-
-        conf = this->private;
-
-        this->private = NULL;
-
-        /* No need to do inode_unref of conf->root_inode as ref/unref doesn't
-         * apply for it*/
-        GF_FREE (conf);
-
-	return;
-}
-
-
-struct xlator_fops fops = {
-	.lookup      = qb_lookup,
-	.fsetxattr   = qb_fsetxattr,
-	.setxattr    = qb_setxattr,
-	.open        = qb_open,
-        .writev      = qb_writev,
-        .readv       = qb_readv,
-        .fsync       = qb_fsync,
-        .truncate    = qb_truncate,
-        .ftruncate   = qb_ftruncate,
-        .stat        = qb_stat,
-        .fstat       = qb_fstat,
-	.setattr     = qb_setattr,
-	.fsetattr    = qb_fsetattr,
-        .flush       = qb_flush,
-/*
-	.getxattr    = qb_getxattr,
-	.fgetxattr   = qb_fgetxattr
-*/
-	.readdirp    = qb_readdirp,
-};
-
-
-struct xlator_cbks cbks = {
-        .forget   = qb_forget,
-	.release  = qb_release,
-};
-
-
-struct xlator_dumpops dumpops = {
-};
-
-
-struct volume_options options[] = {
-        { .key  = {"default-password"},
-          .type = GF_OPTION_TYPE_STR,
-          .default_value = "",
-          .description = "Default password for the AES encrypted block images."
-        },
-        { .key = {NULL} },
-};
diff --git a/xlators/features/qemu-block/src/qemu-block.h b/xlators/features/qemu-block/src/qemu-block.h
deleted file mode 100644
index 21cdcec2613..00000000000
--- a/xlators/features/qemu-block/src/qemu-block.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
-  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef __QEMU_BLOCK_H
-#define __QEMU_BLOCK_H
-
-#include "syncop.h"
-#include "call-stub.h"
-#include "block/block_int.h"
-#include "monitor/monitor.h"
-
-/* QB_XATTR_KEY_FMT is the on-disk xattr stored in the inode which
-   indicates that the file must be "interpreted" by the block format
-   logic. The value of the key is of the pattern:
-
-   "format:virtual_size"
-
-   e.g
-
-   "qcow2:20GB" or "qed:100GB"
-
-   The format and virtual size are colon separated. The format is
-   a case sensitive string which qemu recognizes. virtual_size is
-   specified as a size which glusterfs recognizes as size (i.e.,
-   value accepted by gf_string2bytesize())
-*/
-#define QB_XATTR_KEY_FMT "trusted.glusterfs.%s.format"
-
-#define QB_XATTR_KEY_MAX 64
-
-#define QB_XATTR_VAL_MAX 64
-
-
-typedef struct qb_inode {
-	char fmt[QB_XATTR_VAL_MAX]; /* this is only the format, not "format:size" */
-	uint64_t size; /* virtual size in bytes */
-	BlockDriverState *bs;
-	int refcnt;
-	uuid_t backing_gfid;
-	char *backing_fname;
-} qb_inode_t;
-
-
-typedef struct qb_conf {
-	Monitor *mon;
-	struct syncenv *env;
-	char qb_xattr_key[QB_XATTR_KEY_MAX];
-	char *default_password;
-	inode_t *root_inode;
-} qb_conf_t;
-
-
-typedef struct qb_local {
-	call_frame_t      *frame; /* backpointer */
-	call_stub_t       *stub;
-	inode_t           *inode;
-	fd_t              *fd;
-	char               fmt[QB_XATTR_VAL_MAX+1];
-	char               name[256];
-	synctask_fn_t      synctask_fn;
-	struct list_head   list;
-} qb_local_t;
-
-void qb_local_free (xlator_t *this, qb_local_t *local);
-int qb_coroutine (call_frame_t *frame, synctask_fn_t fn);
-inode_t *qb_inode_from_filename (const char *filename);
-int qb_inode_to_filename (inode_t *inode, char *filename, int size);
-int qb_format_extract (xlator_t *this, char *format, inode_t *inode);
-
-qb_inode_t *qb_inode_ctx_get (xlator_t *this, inode_t *inode);
-
-#define QB_STACK_UNWIND(typ, frame, args ...) do {	\
-	qb_local_t *__local = frame->local;		\
-	xlator_t *__this = frame->this;			\
-							\
-	frame->local = NULL;				\
-	STACK_UNWIND_STRICT (typ, frame, args);		\
-	if (__local)					\
-		qb_local_free (__this, __local);	\
-	} while (0)
-
-#define QB_STUB_UNWIND(stub, op_ret, op_errno) do {	\
-	qb_local_t *__local = stub->frame->local;	\
-	xlator_t *__this = stub->frame->this;		\
-							\
-	stub->frame->local = NULL;			\
-	call_unwind_error (stub, op_ret, op_errno);	\
-	if (__local)					\
-		qb_local_free (__this, __local);	\
-	} while (0)
-
-#define QB_STUB_RESUME(stub_errno) do {			\
-	qb_local_t *__local = stub->frame->local;	\
-	xlator_t *__this = stub->frame->this;		\
-							\
-	stub->frame->local = NULL;			\
-	call_resume (stub);				\
-	if (__local)					\
-		qb_local_free (__this, __local);	\
-	} while (0)
-
-#endif /* !__QEMU_BLOCK_H */