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Peter Lieven fc176116cd block/rbd: workaround for ceph issue #53784
librbd had a bug until early 2022 that affected all versions of ceph that
supported fast-diff. This bug results in reporting of incorrect offsets
if the offset parameter to rbd_diff_iterate2 is not object aligned.

This patch works around this bug for pre Quincy versions of librbd.

Fixes: 0347a8fd4c
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Lieven <pl@kamp.de>
Message-Id: <20220113144426.4036493-3-pl@kamp.de>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Tested-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2022-02-01 15:16:32 +01:00
.github/workflows .github: move repo lockdown to the v2 configuration 2021-10-12 08:38:10 +01:00
.gitlab/issue_templates GitLab: Add "Feature Request" issue template. 2021-06-25 10:08:37 +01:00
.gitlab-ci.d roms/opensbi: Remove ELF images 2022-01-21 15:52:57 +10:00
accel monitor: move x-query-profile into accel/tcg to fix build 2022-01-18 16:42:42 +00:00
audio dsoundaudio: fix crackling audio recordings 2022-01-13 10:47:52 +01:00
authz configure, meson: convert pam detection to meson 2021-06-25 10:54:10 +02:00
backends docs: move D-Bus VMState documentation to source XML 2021-12-21 10:50:21 +04:00
block block/rbd: workaround for ceph issue #53784 2022-02-01 15:16:32 +01:00
bsd-user user: move common-user includes to a subdirectory of {bsd,linux}-user/ 2022-01-12 14:08:29 +01:00
capstone@f8b1b83301
chardev chardev/char-socket: tcp_chr_sync_read: don't clobber errno 2022-01-07 05:19:55 -05:00
common-user meson: cleanup common-user/ build 2022-01-12 14:08:29 +01:00
configs hw/display: Rename VGA_ISA_MM -> VGA_MMIO 2022-01-13 10:58:54 +01:00
contrib meson: build contrib/ executables after generated headers 2022-01-12 14:09:06 +01:00
crypto crypto: add gnutls pbkdf provider 2021-07-14 14:15:52 +01:00
disas target/riscv: setup everything for rv64 to support rv128 execution 2022-01-08 15:46:10 +10:00
docs qemu-img: Unify [-b [-F]] documentation 2022-02-01 13:49:15 +01:00
dtc@b6910bec11 dtc: Update to version 1.6.1 2021-10-14 08:08:11 +02:00
dump dump: Remove is_zero_page() 2021-12-15 10:31:42 +01:00
ebpf ebpf: only include in system emulators 2021-09-17 16:07:52 +08:00
fpu softfloat: Add float64r32 arithmetic routines 2021-12-17 17:57:15 +01:00
fsdev 9pfs: make V9fsPath usable via P9Array API 2021-10-27 14:45:22 +02:00
gdb-xml target/arm: Advertise MVE to gdb when present 2021-11-02 14:14:55 -04:00
hw ppc 7.0 queue: 2022-01-31 11:10:08 +00:00
include block.h: remove outdated comment 2022-02-01 13:49:15 +01:00
io aio-posix: split poll check from ready handler 2022-01-12 17:09:39 +00:00
libdecnumber libdecnumber: Introduce decNumberIntegralToInt128 2021-11-09 10:32:52 +11:00
linux-headers update-linux-headers: Add asm-riscv/kvm.h 2022-01-21 15:52:56 +10:00
linux-user Various testing and other misc updates: 2022-01-19 11:49:56 +00:00
meson@12f9f04ba0 meson: bump submodule to 0.59.3 2021-11-02 15:57:28 +01:00
migration migration: Move temp page setup and cleanup into separate functions 2022-01-28 15:38:23 +01:00
monitor migration: Tally pre-copy, downtime and post-copy bytes independently 2022-01-28 15:38:23 +01:00
nbd nbd/server.c: Remove unused field 2022-01-28 16:48:28 -06:00
net rtc: Move RTC function prototypes to their own header 2022-01-28 14:29:46 +00:00
pc-bios roms/opensbi: Remove ELF images 2022-01-21 15:52:57 +10:00
plugins configure: simplify creation of plugin symbol list 2022-01-12 14:09:06 +01:00
po po: update turkish translation 2021-10-22 18:07:30 +02:00
python python: move qmp-shell under the AQMP package 2022-01-21 16:01:31 -05:00
qapi nbd patches for 2022-01-28 2022-01-30 10:00:28 +00:00
qga * configure and meson fixes 2022-01-28 14:04:01 +00:00
qobject qobject: braces {} are necessary for all arms of this statement 2021-02-04 13:20:29 +01:00
qom monitor: Fix find_device_state() for IDs containing slashes 2021-11-10 06:14:51 +01:00
replay replay: notify CPU on event 2021-04-01 10:37:20 +02:00
roms roms/opensbi: Remove ELF images 2022-01-21 15:52:57 +10:00
scripts target-arm queue: 2022-01-28 16:59:57 +00:00
scsi error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
semihosting target/riscv: Replace riscv_cpu_is_32bit with riscv_cpu_mxl 2021-10-22 07:47:51 +10:00
slirp@a88d9ace23 Update libslirp to v4.6.1 2021-08-03 16:07:22 +04:00
softmmu rtc: Move RTC function prototypes to their own header 2022-01-28 14:29:46 +00:00
storage-daemon qsd: Document fuse's allow-other option 2022-02-01 13:49:15 +01:00
stubs hw/pci: Restrict pci-bus stub to sysemu 2022-01-18 10:45:35 +01:00
subprojects/libvhost-user libvhost-user: fix VHOST_USER_REM_MEM_REG skipping mmap_addr 2021-10-20 04:37:55 -04:00
target ppc 7.0 queue: 2022-01-31 11:10:08 +00:00
tcg exec/memop: Adding signedness to quad definitions 2022-01-08 15:46:10 +10:00
tests iotests/block-status-cache: New test 2022-01-28 16:55:23 -06:00
tools virtiofsd: Drop membership of all supplementary groups (CVE-2022-0358) 2022-01-26 10:32:05 +00:00
trace meson: generate trace events for qmp commands 2022-01-27 11:26:40 +01:00
ui spice: Update QXLInterface for spice >= 0.15.0 2022-01-18 16:42:41 +00:00
util block/export: Fix vhost-user-blk shutdown with requests in flight 2022-02-01 13:49:15 +01:00
.cirrus.yml cirrus: delete FreeBSD and macOS jobs 2021-07-14 14:33:53 +01:00
.dir-locals.el
.editorconfig .editorconfig: update the automatic mode setting for Emacs 2021-03-10 15:34:11 +00:00
.exrc
.gdbinit
.gitattributes maint: Tell git that *.py files should use python diff hunks 2021-02-15 22:13:34 -05:00
.gitignore gitignore: Update with some filetypes 2021-07-23 17:22:15 +01:00
.gitlab-ci.yml docs: Document GitLab custom CI/CD variables 2021-07-29 07:56:01 +02:00
.gitmodules tests: integrate lcitool for generating build env manifests 2022-01-18 16:42:41 +00:00
.gitpublish
.mailmap MAINTAINERS: Change philmd's email address 2021-12-31 13:42:54 +01:00
.patchew.yml scripts/checkpatch: roll diff tweaking into checkpatch itself 2021-06-25 10:08:33 +01:00
.readthedocs.yml
.travis.yml travis.yml: Remove the "Release tarball" job 2021-10-12 08:37:05 +01:00
block.c block: bdrv_set_backing_hd(): use drained section 2022-02-01 13:49:15 +01:00
blockdev-nbd.c block/nbd: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:29:47 +01:00
blockdev.c include/sysemu/blockdev.h: remove drive_get_max_devs 2022-01-14 12:03:16 +01:00
blockjob.c blockjob: drop BlockJob.blk field 2021-12-28 15:18:59 +01:00
configure configure: fix parameter expansion of --cross-cc-cflags options 2022-01-28 11:13:33 +01:00
COPYING
COPYING.LIB
cpu.c linux-user: Add code for PR_GET/SET_UNALIGN 2022-01-06 11:40:52 +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 Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
gdbstub.c gdbstub, kvm: let KVM report supported singlestep flags 2021-12-10 09:47:18 +01:00
gitdm.config contrib/gitdm: add a new interns group-map for GSoC/Outreachy work 2021-07-23 17:22:16 +01:00
hmp-commands-info.hx monitor: move x-query-profile into accel/tcg to fix build 2022-01-18 16:42:42 +00:00
hmp-commands.hx hmp: Add shortcut to stop command to match cont 2021-11-09 10:11:27 +01:00
iothread.c iothread: use IOThreadParamInfo in iothread_[set|get]_param() 2021-10-07 15:29:50 +01:00
job-qmp.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
job.c job.c: add missing notifier initialization 2021-12-28 15:16:31 +01:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
Kconfig.host kconfig: split CONFIG_SPARSE_MEM from fuzzing 2021-10-14 09:50:56 +02:00
LICENSE
MAINTAINERS MAINTAINERS: Remove myself (for raspi). 2022-01-28 14:29:47 +00:00
Makefile tests: integrate lcitool for generating build env manifests 2022-01-18 16:42:41 +00:00
memory_ldst.c.inc exec/memory_ldst: Use correct type sizes 2021-05-26 08:35:51 -07:00
meson_options.txt ui: add a D-Bus display backend 2021-12-21 10:50:22 +04:00
meson.build * configure and meson fixes 2022-01-28 14:04:01 +00:00
module-common.c
os-posix.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
os-win32.c remove qemu-options* from root directory 2021-05-26 14:49:46 +02:00
page-vary-common.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
page-vary.c exec: Build page-vary-common.c with -fno-lto 2021-03-23 19:36:47 -06:00
qemu-bridge-helper.c
qemu-edid.c edid: set default resolution to 1280x800 (WXGA) 2022-01-13 10:59:16 +01:00
qemu-img-cmds.hx qemu-img: Unify [-b [-F]] documentation 2022-02-01 13:49:15 +01:00
qemu-img.c qemu-img: make is_allocated_sectors() more efficient 2022-01-14 12:03:16 +01:00
qemu-io-cmds.c block: Acquire AioContexts during bdrv_reopen_multiple() 2021-07-09 13:19:11 +02:00
qemu-io.c error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
qemu-keymap.c qemu-keymap: Add license in generated files 2021-12-17 10:41:50 +01:00
qemu-nbd.c nbd/server: Add --selinux-label option 2021-11-16 10:16:38 -06:00
qemu-options.hx hw/arm/virt: Support CPU cluster on ARM virt machine 2022-01-20 11:47:52 +00:00
qemu.nsi nsis: adjust for new MinGW paths 2021-01-23 15:55:05 -05:00
qemu.sasl sasl: remove comment about obsolete kerberos versions 2021-06-14 13:28:50 +01:00
README.rst README: Fix some documentation URLs 2021-10-23 20:28:12 +02:00
replication.c replication: move include out of root directory 2021-05-26 14:49:46 +02:00
trace-events trace: Split guest_mem_before 2021-10-05 16:53:17 -07:00
VERSION Open 6.3 development tree 2021-12-14 12:40:12 -08:00
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.


Documentation
=============

Documentation can be found hosted online at
`<https://www.qemu.org/documentation/>`_. The documentation for the
current development version that is available at
`<https://www.qemu.org/docs/master/>`_ is generated from the ``docs/``
folder in the source tree, and is built by `Sphinx
<https://www.sphinx-doc.org/en/master/>_`.


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


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

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

.. code-block:: shell

   git clone https://gitlab.com/qemu-project/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 `style section
<https://www.qemu.org/docs/master/devel/style.html>` of
the Developers Guide.

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

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

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://gitlab.com/qemu-project/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 GitLab issues to track bugs. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://gitlab.com/qemu-project/qemu/-/issues>`_

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 GitLab.

For additional information on bug reporting consult:

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