Original Xbox Emulator for Windows, macOS, and Linux (Active Development)
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Andrey Shinkevich 205736f488 block: apply COR-filter to block-stream jobs
This patch completes the series with the COR-filter applied to
block-stream operations.

Adding the filter makes it possible in future implement discarding
copied regions in backing files during the block-stream job, to reduce
the disk overuse (we need control on permissions).

Also, the filter now is smart enough to do copy-on-read with specified
base, so we have benefit on guest reads even when doing block-stream of
the part of the backing chain.

Several iotests are slightly modified due to filter insertion.

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20201216061703.70908-14-vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2021-01-26 14:36:37 +01:00
.github
.gitlab-ci.d gitlab-ci: Add alpine to pipeline 2021-01-20 10:46:54 +01:00
accel tcg: Restart code generation when we run out of temps 2021-01-24 08:03:27 -10:00
audio audio: space prohibited between function name and parenthesis'(' 2021-01-15 11:49:26 +01:00
authz authz-simple: Check that 'identity' property is set 2020-11-18 10:51:35 +00:00
backends bugfix: hostmem: Free host_nodes list right after visited 2020-12-18 15:20:23 -05:00
block block: apply COR-filter to block-stream jobs 2021-01-26 14:36:37 +01:00
bsd-user gdbstub: drop CPUEnv from gdb_exit() 2021-01-18 10:05:06 +00:00
capstone@f8b1b83301 capstone: Update to upstream "next" branch 2020-10-03 04:23:14 -05:00
chardev chardev/char-socket.c: Add yank feature 2021-01-13 10:21:17 +01:00
contrib elf2dmp: Rename PAGE_SIZE to ELF2DMP_PAGE_SIZE 2021-01-20 10:46:54 +01:00
crypto crypto: Move the creation of the library to the main meson.build 2020-10-12 11:50:20 -04:00
default-configs Testing, gdbstub and semihosting patches: 2021-01-18 12:10:20 +00:00
disas build-system: clean up TCG/TCI configury 2021-01-21 13:00:41 +01:00
docs qemu-option: warn for short-form boolean options 2021-01-23 15:55:08 -05:00
dtc@85e5d83984
dump monitor: Use getter/setter functions for cur_mon 2020-10-09 07:08:19 +02:00
fpu
fsdev meson: Declare have_virtfs_proxy_helper in main meson.build 2021-01-23 15:55:04 -05:00
gdb-xml target/riscv: Remove built-in GDB XML files for CSRs 2021-01-16 10:57:21 -08:00
hw -----BEGIN PGP SIGNATURE----- 2021-01-25 15:56:13 +00:00
include qapi: block-stream: add "bottom" argument 2021-01-26 14:36:37 +01:00
io Yank patches patches for 2021-01-13 2021-01-13 14:19:24 +00:00
libdecnumber
linux-headers Update linux headers to 5.11-rc2 2021-01-21 11:19:45 +01:00
linux-user linux-user: Remove obsolete F_SHLCK and F_EXLCK translation 2021-01-21 13:27:34 +01:00
meson@776acd2a80 submodules: bump meson to 0.55.3 2020-10-17 10:45:42 -04:00
migration migration: Add yank feature 2021-01-13 10:21:17 +01:00
monitor qmp: remove deprecated "change" command 2021-01-23 15:55:07 -05:00
nbd nbd/server: Quiesce coroutines on context switch 2021-01-20 14:48:54 -06:00
net net: checksum: Introduce fine control over checksum type 2021-01-25 17:04:56 +08:00
pc-bios meson.build: Detect bzip2 program 2021-01-23 15:55:07 -05:00
plugins cfi: Initial support for cfi-icall in QEMU 2021-01-02 21:03:35 +01:00
po configure: move gettext detection to meson.build 2021-01-02 21:03:09 +01:00
python python: add __repr__ to ConsoleSocket to aid debugging 2021-01-02 21:03:09 +01:00
qapi qapi: block-stream: add "bottom" argument 2021-01-26 14:36:37 +01:00
qga meson: convert wixl detection to Meson 2021-01-23 15:55:05 -05:00
qobject qobject: Make QString immutable 2020-12-19 10:39:41 +01:00
qom qom: Assert that objects being destroyed have no parent 2021-01-02 21:03:09 +01:00
replay Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
roms qboot: update to latest upstream 2020-11-20 10:48:53 -05:00
scripts update-linux-headers: Include const.h 2021-01-21 11:19:45 +01:00
scsi scsi/utils: Add INVALID_PARAM_VALUE sense code definition 2021-01-22 14:51:35 +01:00
slirp@8f43a99191 slirp: update to fix CVE-2020-29129 CVE-2020-29130 2020-11-27 20:57:11 +04:00
softmmu vnc: support "-vnc help" 2021-01-23 15:55:07 -05:00
storage-daemon meson: Propagate gnutls dependency 2021-01-12 12:38:03 +01:00
stubs Fix build with new yank feature by adding stubs 2021-01-18 10:04:31 +00:00
subprojects/libvhost-user build-sys: add libvhost-user missing dependencies 2021-01-23 09:26:41 -05:00
target * Make MinGW respect --bindir (Joshua) 2021-01-23 22:34:21 +00:00
tcg tcg: Restart code generation when we run out of temps 2021-01-24 08:03:27 -10:00
tests block: apply COR-filter to block-stream jobs 2021-01-26 14:36:37 +01:00
tools cap_ng: convert to meson 2021-01-06 10:21:20 +01:00
trace From Alex's pull request: 2021-01-06 15:55:29 +00:00
ui vnc: support "-vnc help" 2021-01-23 15:55:07 -05:00
util SD/MMC patches 2021-01-25 11:52:00 +00:00
.cirrus.yml cirrus/msys2: Cache msys2 mingw in a better way. 2021-01-12 12:38:03 +01:00
.dir-locals.el
.editorconfig
.exrc
.gdbinit
.gitattributes buildsys: Help git-diff adding .gitattributes config file 2020-11-18 09:33:16 +01:00
.gitignore Makefile: add GNU global tags support 2021-01-18 10:04:31 +00:00
.gitlab-ci.yml gitlab-ci: Add alpine to pipeline 2021-01-20 10:46:54 +01:00
.gitmodules
.gitpublish
.mailmap MAINTAINERS: chenhc@lemote.com -> chenhuacai@kernel.org 2020-12-13 16:00:58 +01:00
.patchew.yml
.readthedocs.yml readthedocs: build with Python 3.6 2020-10-05 16:30:45 +01:00
.shippable.yml shippable.yml: Remove jobs duplicated on Gitlab-CI 2021-01-18 10:04:31 +00:00
.travis.yml gitlab: migrate the minimal tools and unit tests from Travis 2021-01-18 10:04:31 +00:00
block.c block: add API function to insert a node 2021-01-26 11:26:54 +01:00
blockdev-nbd.c nbd: Update qapi to support exporting multiple bitmaps 2020-10-30 15:10:15 -05:00
blockdev.c qapi: block-stream: add "bottom" argument 2021-01-26 14:36:37 +01:00
blockjob.c
CODING_STYLE.rst CODING_STYLE.rst: Be less strict about 80 character limit 2020-12-13 17:51:33 +01:00
configure meson: convert wixl detection to Meson 2021-01-23 15:55:05 -05:00
COPYING
COPYING.LIB
cpu.c remove TCG includes from common code 2021-01-02 21:03:36 +01:00
cpus-common.c overall/alpha tcg cpus|hppa: Fix Lesser GPL version number 2020-11-15 16:43:54 +01:00
disas.c disas: Push const down through host disassembly 2021-01-07 05:09:42 -10:00
exec-vary.c nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
gdbstub.c gdbstub: ensure we clean-up when terminated 2021-01-18 10:05:06 +00:00
gitdm.config
hmp-commands-info.hx replay: introduce info hmp/qmp command 2020-10-06 08:34:49 +02:00
hmp-commands.hx hmp: remove "change vnc TARGET" command 2021-01-23 15:55:07 -05:00
iothread.c
job-qmp.c
job.c
Kconfig
Kconfig.host
LICENSE
MAINTAINERS MAINTAINERS: Make status spellings consistent 2021-01-20 10:46:54 +01:00
Makefile meson: convert wixl detection to Meson 2021-01-23 15:55:05 -05:00
memory_ldst.c.inc nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
meson_options.txt meson: convert wixl detection to Meson 2021-01-23 15:55:05 -05:00
meson.build meson.build: Detect bzip2 program 2021-01-23 15:55:07 -05:00
module-common.c
os-posix.c
os-win32.c
qemu-bridge-helper.c qemu-bridge-helper: relocate path to default ACL 2020-09-30 19:11:36 +02:00
qemu-edid.c qemu-edid: drop cast 2020-10-14 06:05:56 +02:00
qemu-img-cmds.hx qemu-img: add support for rate limit in qemu-img convert 2020-10-27 15:26:20 +01:00
qemu-img.c qobject: Change qobject_to_json()'s value to GString 2020-12-19 10:38:43 +01:00
qemu-io-cmds.c qemu-io: add preallocate mode parameter for truncate command 2020-12-18 12:35:55 +01:00
qemu-io.c trace: remove argument from trace_init_file 2020-11-11 13:08:09 +00:00
qemu-keymap.c
qemu-nbd.c qemu-nbd: Fix a memleak in nbd_client_thread() 2021-01-20 14:48:05 -06:00
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx runstate: cleanup reboot and panic actions 2021-01-21 13:00:41 +01:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl
README.rst CHANGELOG: remove disused file 2020-10-27 16:48:50 +01:00
replication.c
replication.h
thunk.c overall usermode...: Fix Lesser GPL version number 2020-11-15 16:43:40 +01:00
trace-events
VERSION Open 6.0 development tree 2020-12-08 21:04:57 +00:00
version.rc configure: remove CONFIG_FILEVERSION and CONFIG_PRODUCTVERSION 2021-01-02 21:03:37 +01:00

===========
QEMU README
===========

QEMU is a generic and open source machine & userspace emulator and
virtualizer.

QEMU is capable of emulating a complete machine in software without any
need for hardware virtualization support. By using dynamic translation,
it achieves very good performance. QEMU can also integrate with the Xen
and KVM hypervisors to provide emulated hardware while allowing the
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
near native performance for CPUs. When QEMU emulates CPUs directly it is
capable of running operating systems made for one machine (e.g. an ARMv7
board) on a different machine (e.g. an x86_64 PC board).

QEMU is also capable of providing userspace API virtualization for Linux
and BSD kernel interfaces. This allows binaries compiled against one
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
different architecture ABI (e.g. the Linux x86_64 ABI). This does not
involve any hardware emulation, simply CPU and syscall emulation.

QEMU aims to fit into a variety of use cases. It can be invoked directly
by users wishing to have full control over its behaviour and settings.
It also aims to facilitate integration into higher level management
layers, by providing a stable command line interface and monitor API.
It is commonly invoked indirectly via the libvirt library when using
open source applications such as oVirt, OpenStack and virt-manager.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


Building
========

QEMU is multi-platform software intended to be buildable on all modern
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
of other UNIX targets. The simple steps to build QEMU are:


.. code-block:: shell

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

* `<https://qemu.org/Hosts/Linux>`_
* `<https://qemu.org/Hosts/Mac>`_
* `<https://qemu.org/Hosts/W32>`_


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

.. code-block:: shell

   git clone https://git.qemu.org/git/qemu.git

When submitting patches, one common approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the
qemu-devel@nongnu.org mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the CODING_STYLE.rst file.

Additional information on submitting patches can be found online via
the QEMU website

* `<https://qemu.org/Contribute/SubmitAPatch>`_
* `<https://qemu.org/Contribute/TrivialPatches>`_

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://git.qemu.org/git/qemu-web.git

* `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_

A 'git-publish' utility was created to make above process less
cumbersome, and is highly recommended for making regular contributions,
or even just for sending consecutive patch series revisions. It also
requires a working 'git send-email' setup, and by default doesn't
automate everything, so you may want to go through the above steps
manually for once.

For installation instructions, please go to

*  `<https://github.com/stefanha/git-publish>`_

The workflow with 'git-publish' is:

.. code-block:: shell

  $ git checkout master -b my-feature
  $ # work on new commits, add your 'Signed-off-by' lines to each
  $ git publish

Your patch series will be sent and tagged as my-feature-v1 if you need to refer
back to it in the future.

Sending v2:

.. code-block:: shell

  $ git checkout my-feature # same topic branch
  $ # making changes to the commits (using 'git rebase', for example)
  $ git publish

Your patch series will be sent with 'v2' tag in the subject and the git tip
will be tagged as my-feature-v2.

Bug reporting
=============

The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://bugs.launchpad.net/qemu/>`_

If using QEMU via an operating system vendor pre-built binary package, it
is preferable to report bugs to the vendor's own bug tracker first. If
the bug is also known to affect latest upstream code, it can also be
reported via launchpad.

For additional information on bug reporting consult:

* `<https://qemu.org/Contribute/ReportABug>`_


ChangeLog
=========

For version history and release notes, please visit
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for
more detailed information.


Contact
=======

The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

* `<mailto:qemu-devel@nongnu.org>`_
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_
* #qemu on irc.oftc.net

Information on additional methods of contacting the community can be
found online via the QEMU website:

* `<https://qemu.org/Contribute/StartHere>`_