Fix nocow typos in manpage

Signed-off-by: Chunyan Liu <cyliu@suse.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
mirror: Fix qiov size for short requests

When mirroring an image of a size that is not a multiple of the
mirror job granularity, the last request would have the right nb_sectors
argument, but a qiov that is rounded up to the next multiple of the
granularity. Don't do this.

This fixes a segfault that is caused by raw-posix being confused by this
and allocating a buffer with request length, but operating on it with
qiov length.

[s/Driver/Drive/ in qemu-iotests 041 as suggested by Eric
--Stefan]

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
MAINTAINERS: add Stefan Hajnoczi to IDE maintainers

Make Stefan officially co-maintain hw/ide/ with Kevin.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
ahci.c: mask unused flags when reading size PRDT DBC

The data byte count(DBC) read from the description information is defined for
bits 21:00. Bits 30:22 are reserved and bit 31 is the Interrupt on Completion
(I) flag.

Completion interrupts are triggered after every transaction instead of on
I-flag in QEMU. tbl_entry_size is a signed integer and improperly reading the
DBC leads to a negative offset that causes sglist allocation to fail.

Signed-off-by: Reza Jelveh <reza.jelveh@tuhh.de>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
qemu-iotests: Disable Quorum testing in 041 when Quorum is not builtin

This avoid breaking tests on RHEL6 where gnutls is too old for quorum to be
built by default.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
raw-posix: Fix raw_getlength() to always return -errno on error

We got a merry mix of -1 and -errno here.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
ahci: map memory via device's address space instead of address_space_memory

In map_page() in hw/ide/ahci.c, replace cpu_physical_memory_map() and
cpu_physical_memory_unmap() with dma_memory_map() and dma_memory_unmap(),
because ahci devices should not access memory directly but via their address
space. Add an AddressSpace parameter to map_page(). In order to call
map_page(), we should pass the AHCIState.as as the AddressSpace argument.

Signed-off-by: Le Tan <tamlokveer@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
block: block: introduce APIs for submitting IO as a batch

This patch introduces three APIs so that following
patches can support queuing I/O requests and submitting them
as a batch for improving I/O performance.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
linux-aio: implement io plug, unplug and flush io queue

This patch implements .bdrv_io_plug, .bdrv_io_unplug and
.bdrv_flush_io_queue callbacks for linux-aio Block Drivers,
so that submitting I/O as a batch can be supported on linux-aio.

[Unprocessed requests are completed with -EIO instead of a bogus ret
value.
--Stefan]

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
dataplane: submit I/O as a batch

Before commit 580b6b2aa2(dataplane: use the QEMU block
layer for I/O), dataplane for virtio-blk submits block
I/O as a batch.

This commit 580b6b2aa2 replaces the custom linux AIO
implementation(including submit I/O as a batch) with QEMU
block layer, but this commit causes ~40% throughput regression
on virtio-blk performance, and removing submitting I/O
as a batch is one of the causes.

This patch applies the newly introduced bdrv_io_plug() and
bdrv_io_unplug() interfaces to support submitting I/O
at batch for Qemu block layer, and in my test, the change
can improve throughput by ~30% with 'aio=native'.

Following my fio test script:

	[global]
	direct=1
	size=4G
	bsrange=4k-4k
	timeout=40
	numjobs=4
	ioengine=libaio
	iodepth=64
	filename=/dev/vdc
	group_reporting=1

	[f]
	rw=randread

Result on one of my small machine(host: x86_64, 2cores, 4thread, guest: 4cores):
	- qemu master: 65K IOPS
	- qemu master with these patches: 92K IOPS
	- 2.0.0 release(dataplane using custom linux aio): 104K IOPS

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
qmp: show QOM properties in device-list-properties

Devices can use a mix of qdev and QOM properties.  Currently only the
qdev properties are displayed by device-list-properties.

This patch extends the property enumeration algorithm to also display
QOM properties (excluding the implicit "type", "realized",
"hotpluggable", and "parent_bus" properties).

When a qdev property exists, use the qdev type name to preserve
backwards compatibility.  QOM type names can be different for bool (qdev
on/off) and str (used by qdev pointers).

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
xen_backend: introduce xenstore_read_uint64 and xenstore_read_fe_uint64

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
xen: build on ARM

Collection of fixes to build QEMU with Xen support on ARM:
- use xenstore_read_fe_uint64 to retrieve the page-ref (xenfb);
- use xen_pfn_t instead of unsigned long in xenfb;
- unsigned long/xenpfn_t in xen_remove_from_physmap;
- in xen-mapcache.c use HOST_LONG_BITS to check for QEMU's address space
size.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Merge remote-tracking branch 'remotes/sstabellini/xen_arm_20140707' into staging

* remotes/sstabellini/xen_arm_20140707:
  xen: build on ARM
  xen_backend: introduce xenstore_read_uint64 and xenstore_read_fe_uint64

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Block pull request

# gpg: Signature made Mon 07 Jul 2014 13:27:20 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/block-pull-request:
  qmp: show QOM properties in device-list-properties
  dataplane: submit I/O as a batch
  linux-aio: implement io plug, unplug and flush io queue
  block: block: introduce APIs for submitting IO as a batch
  ahci: map memory via device's address space instead of address_space_memory
  raw-posix: Fix raw_getlength() to always return -errno on error
  qemu-iotests: Disable Quorum testing in 041 when Quorum is not builtin
  ahci.c: mask unused flags when reading size PRDT DBC
  MAINTAINERS: add Stefan Hajnoczi to IDE maintainers
  mirror: Fix qiov size for short requests
  Fix nocow typos in manpage

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
QEMUSizedBuffer/QEMUFile

Stefan Berger's to create a QEMUFile that goes to a memory buffer;
from:

http://lists.gnu.org/archive/html/qemu-devel/2013-03/msg05036.html

Using the QEMUFile interface, this patch adds support functions for
operating
on in-memory sized buffers that can be written to or read from.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Joel Schopp <jschopp@linux.vnet.ibm.com>
Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
VMState test: basic vmstate testing mechanism

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
VMState test: hmp interface for vmstate testing

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
VMState test: set the frequency of the vmstate testing process

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
VMState test: cancel mechanism for an already running vmstate testing process

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>