Merge tag 'pull-block-2022-04-25' of https://gitlab.com/hreitz/qemu into staging

Block patches:
- New @force parameter for blockdev-change-medium
- Improvements to the iotests to help with debugging

Merge tag 'pull-block-2022-04-25' of https://gitlab.com/hreitz/qemu into staging

Block patches:
- New @force parameter for blockdev-change-medium
- Improvements to the iotests to help with debugging
- Fix iotest 108 on systems without user_allow_other in fuse.conf

# -----BEGIN PGP SIGNATURE-----
#
# iQJGBAABCAAwFiEEy2LXoO44KeRfAE00ofpA0JgBnN8FAmJmqyISHGhyZWl0ekBy
# ZWRoYXQuY29tAAoJEKH6QNCYAZzf7uEP/RKNblyIuFjHkPgaMzWqdGUjHpbRzKBi
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# bGmX+h38AK1omSR2iWRhu4ue4VAPeu9gLoHNYJ5vZlylWD3eHdppN7K2KFf7Aeo5
# /BnhwHiU2IQ7WkLlo5Pdb96+LqZfmCGYJGWO6eWx123+j+bpjLfpmV9+Kjzb1pDc
# FN60OFlp8RozXHKpqh4ZoThtJ+t3sYdlo6yvg1K18Y5JcXTx5d4D24HGo1ZIRxqz
# XgJbi+bSr8hnxCjvdUZlr3IpbjAE5DVbCjtDxyjGnim6vjIwhxCSWM7Bvzw2tm60
# TYNl2zxyIe5831v6Xv/YfYJFqtos/orZf87TSqx/uWrfinbxZ1nN/8zi5z9lC8tg
# S6IlNpKPK0wv33BmLVHcsnMABLY2YiJPx/Ngl0CvAEGvkQdaHzgcYGbmeEMrZTv7
# hVpBb1t+AKmnXYYZdCh4ulfJLUg3R9mXf0oI3otbcpNMwExB6hqcVI23VYC00Ct5
# m3Tb6bddIkBih25l9B7i6FPWfXG+0zu6Q4kIQiXmfNkqKseQ96aDY1aAU/GWoTZH
# MOOPqIhmLRgyYpJ3+am9AseczaMybC4DIfx1VXzjwS/X3YwHvHEbZ7iPR6C0630Z
# yslJbuH4ERl7
# =url0
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 25 Apr 2022 07:07:30 AM PDT
# gpg: using RSA key CB62D7A0EE3829E45F004D34A1FA40D098019CDF
# gpg: issuer "hreitz@redhat.com"
# gpg: Good signature from "Hanna Reitz <hreitz@redhat.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: CB62 D7A0 EE38 29E4 5F00 4D34 A1FA 40D0 9801 9CDF

* tag 'pull-block-2022-04-25' of https://gitlab.com/hreitz/qemu:
iotests/108: Fix when missing user_allow_other
iotests: make qemu_io_log() check return codes by default
iotests: remove qemu_io_silent() and qemu_io_silent_check().
iotests: remove qemu_io_pipe_and_status()
iotests/image-fleecing: switch to qemu_io()
iotests/migration-permissions: use assertRaises() for qemu_io() negative test
iotests: rebase qemu_io() on top of qemu_tool()
iotests: create generic qemu_tool() function
iotests/040: Fix TestCommitWithFilters test
iotests/040: Don't check image pattern on zero-length image
iotests: Don't check qemu_io() output for specific error strings
iotests/163: Fix broken qemu-io invocation
iotests: replace calls to log(qemu_io(...)) with qemu_io_log()
block: add 'force' parameter to 'blockdev-change-medium' command

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

iotests: replace calls to log(qemu_io(...)) with qemu_io_log()

This makes these callsites a little simpler, but the real motivation is
a forthcoming commit will change the return type of qemu_io(),

iotests: replace calls to log(qemu_io(...)) with qemu_io_log()

This makes these callsites a little simpler, but the real motivation is
a forthcoming commit will change the return type of qemu_io(), so removing
users of the return value now is helpful.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220418211504.943969-2-jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>

show more ...

Merge tag 'pull-block-2022-03-22' of https://gitlab.com/hreitz/qemu into staging

Block patches for 7.0-rc1:
- iotest fixes:
- Fix some iotests for riscv targets
- Use GNU sed in more places wher

Merge tag 'pull-block-2022-03-22' of https://gitlab.com/hreitz/qemu into staging

Block patches for 7.0-rc1:
- iotest fixes:
- Fix some iotests for riscv targets
- Use GNU sed in more places where required
- Meson-related fixes (i.e. to print errors when they occur)
- Have qemu-img calls (from Python tests) generally raise nicely
formattable exceptions on errors
- Fix iotest 207
- Allow RBD images to be growable by writing zeroes past the end of
file, fixing qcow2 on rbd

# gpg: Signature made Tue 22 Mar 2022 11:51:10 GMT
# gpg: using RSA key CB62D7A0EE3829E45F004D34A1FA40D098019CDF
# gpg: issuer "hreitz@redhat.com"
# gpg: Good signature from "Hanna Reitz <hreitz@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: CB62 D7A0 EE38 29E4 5F00 4D34 A1FA 40D0 9801 9CDF

* tag 'pull-block-2022-03-22' of https://gitlab.com/hreitz/qemu: (25 commits)
iotests/207: Filter host fingerprint
iotests.py: Filters for VM.run_job()
iotests: make qemu_img_log and img_info_log raise on error
iotests: remove qemu_img_pipe_and_status()
iotests: replace qemu_img_log('create', ...) calls
iotests: use qemu_img() in has_working_luks()
iotests: remove remaining calls to qemu_img_pipe()
iotests/149: Remove qemu_img_pipe() call
iotests: replace unchecked calls to qemu_img_pipe()
iotests: change supports_quorum to use qemu_img
iotests: add qemu_img_map() function
iotests/remove-bitmap-from-backing: use qemu_img_info()
iotests: add qemu_img_info()
iotests: use qemu_img_json() when applicable
iotests: add qemu_img_json()
iotests: fortify compare_images() against crashes
iotests: make qemu_img raise on non-zero rc by default
iotests: Remove explicit checks for qemu_img() == 0
python/utils: add VerboseProcessError
python/utils: add add_visual_margin() text decoration utility
...

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

show more ...

iotests: replace qemu_img_log('create', ...) calls

qemu_img_log() calls into qemu_img_pipe(), which always removes output
for 'create' commands on success anyway. Replace all of these calls to
the s

iotests: replace qemu_img_log('create', ...) calls

qemu_img_log() calls into qemu_img_pipe(), which always removes output
for 'create' commands on success anyway. Replace all of these calls to
the simpler qemu_img_create(...) which doesn't log, but raises a
detailed exception object on failure instead.

Blank lines are removed from output files where appropriate.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220321201618.903471-17-jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/jsnow/tags/python-pull-request' into staging

Pull request

# gpg: Signature made Mon 01 Nov 2021 01:29:49 PM EDT
# gpg: using RSA key F9B7ABDBBCA

Merge remote-tracking branch 'remotes/jsnow/tags/python-pull-request' into staging

Pull request

# gpg: Signature made Mon 01 Nov 2021 01:29:49 PM EDT
# gpg: using RSA key F9B7ABDBBCACDF95BE76CBD07DEF8106AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>" [full]

* remotes/jsnow/tags/python-pull-request: (22 commits)
python, iotests: replace qmp with aqmp
python/aqmp: Create sync QMP wrapper for iotests
iotests/300: avoid abnormal shutdown race condition
iotests: Conditionally silence certain AQMP errors
iotests: Accommodate async QMP Exception classes
python/aqmp: Remove scary message
python/machine: Handle QMP errors on close more meticulously
python/machine: remove has_quit argument
python: Add iotest linters to test suite
iotests/linters: Add workaround for mypy bug #9852
iotests/linters: Add entry point for linting via Python CI
iotests: split linters.py out from 297
iotests/297: split test into sub-cases
iotests/297: update tool availability checks
iotests/297: Change run_linter() to raise an exception on failure
iotests/297: refactor run_[mypy|pylint] as generic execution shim
iotests/297: Split run_linters apart into run_pylint and run_mypy
iotests/297: Don't rely on distro-specific linter binaries
iotests/297: Create main() function
iotests/297: Add get_files() function
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

python/machine: remove has_quit argument

If we spy on the QMP commands instead, we don't need callers to remember
to pass it. Seems like a fair trade-off.

The one slightly weird bit is overloading

python/machine: remove has_quit argument

If we spy on the QMP commands instead, we don't need callers to remember
to pass it. Seems like a fair trade-off.

The one slightly weird bit is overloading this instance variable for
wait(), where we use it to mean "don't issue the qmp 'quit'
command". This means that wait() will "fail" if the QEMU process does
not terminate of its own accord.

In most cases, we probably did already actually issue quit -- some
iotests do this -- but in some others, we may be waiting for QEMU to
terminate for some other reason, such as a test wherein we tell the
guest (directly) to shut down.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20211026175612.4127598-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-01-20' into staging

nbd patches for 2021-01-20

- minor resource leak fixes in qemu-nbd
- ensure proper aio context when nbd server use

Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-01-20' into staging

nbd patches for 2021-01-20

- minor resource leak fixes in qemu-nbd
- ensure proper aio context when nbd server uses iothreads
- iotest refactorings in preparation for rewriting ./check to be more
flexible, and preparing for more nbd server reconnect features

# gpg: Signature made Thu 21 Jan 2021 02:28:19 GMT
# gpg: using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg: aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg: aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2 F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2021-01-20:
iotests.py: qemu_io(): reuse qemu_tool_pipe_and_status()
iotests.py: fix qemu_tool_pipe_and_status()
iotests/264: fix style
iotests: define group in each iotest
iotests/294: add shebang line
iotests: make tests executable
iotests: fix some whitespaces in test output files
iotests/303: use dot slash for qcow2.py running
iotests/277: use dot slash for nbd-fault-injector.py running
nbd/server: Quiesce coroutines on context switch
block: Honor blk_set_aio_context() context requirements
qemu-nbd: Fix a memleak in nbd_client_thread()
qemu-nbd: Fix a memleak in qemu_nbd_client_list()

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

show more ...

iotests: define group in each iotest

We are going to drop group file. Define group in tests as a preparatory
step.

The patch is generated by

cd tests/qemu-iotests

grep '^[0-9]\{3\} ' grou

iotests: define group in each iotest

We are going to drop group file. Define group in tests as a preparatory
step.

The patch is generated by

cd tests/qemu-iotests

grep '^[0-9]\{3\} ' group | while read line; do
file=$(awk '{print $1}' <<< "$line");
groups=$(sed -e 's/^... //' <<< "$line");
awk "NR==2{print \"# group: $groups\"}1" $file > tmp;
cat tmp > $file;
done

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210116134424.82867-7-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2020-05-05' into staging

Block patches:
- Asynchronous copying for block-copy (i.e., the backup job)
- Allow resizing of qcow2 images w

Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2020-05-05' into staging

Block patches:
- Asynchronous copying for block-copy (i.e., the backup job)
- Allow resizing of qcow2 images when they have internal snapshots
- iotests: Logging improvements for Python tests
- iotest 153 fix, and block comment cleanups

# gpg: Signature made Tue 05 May 2020 13:56:58 BST
# gpg: using RSA key 91BEB60A30DB3E8857D11829F407DB0061D5CF40
# gpg: issuer "mreitz@redhat.com"
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>" [full]
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40

* remotes/maxreitz/tags/pull-block-2020-05-05: (24 commits)
block/block-copy: use aio-task-pool API
block/block-copy: refactor task creation
block/block-copy: add state pointer to BlockCopyTask
block/block-copy: alloc task on each iteration
block/block-copy: rename in-flight requests to tasks
Fix iotest 153
block: Comment cleanups
qcow2: Tweak comment about bitmaps vs. resize
qcow2: Allow resize of images with internal snapshots
block: Add blk_new_with_bs() helper
iotests: use python logging for iotests.log()
iotests: Mark verify functions as private
iotest 258: use script_main
iotests: add script_initialize
iotests: add hmp helper with logging
iotests: limit line length to 79 chars
iotests: touch up log function signature
iotests: drop pre-Python 3.4 compatibility code
iotests: alphabetize standard imports
iotests: add pylintrc file
...

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

show more ...

iotests: add script_initialize

Like script_main, but doesn't require a single point of entry.
Replace all existing initialization sections with this drop-in replacement.

This brings debug support t

iotests: add script_initialize

Like script_main, but doesn't require a single point of entry.
Replace all existing initialization sections with this drop-in replacement.

This brings debug support to all existing script-style iotests.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200331000014.11581-12-jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
[mreitz: Give 274 the same treatment]
Signed-off-by: Max Reitz <mreitz@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/philmd-gitlab/tags/python-next-20200207' into staging

- Python 3 cleanups:
. Remove text about Python 2 in qemu-deprecated (Thomas)
. Remove shebang header

Merge remote-tracking branch 'remotes/philmd-gitlab/tags/python-next-20200207' into staging

- Python 3 cleanups:
. Remove text about Python 2 in qemu-deprecated (Thomas)
. Remove shebang header (Paolo, Philippe)
. scripts/checkpatch.pl now allows Python 3 interpreter (Philippe)
. Explicit usage of Python 3 interpreter in scripts (Philippe)
. Fix Python scripts permissions (Paolo, Philippe)
. Drop 'from __future__ import print_function' (Paolo)
. Specify minimum python requirements in ReadTheDocs configuration (Alex)
- Test UNIX/EXEC transports with migration (Oksana)
- Added extract_from_rpm helper, improved extract_from_deb (Liam)
- Allow to use other serial consoles than default one (Philippe)
- Various improvements in QEMUMonitorProtocol (Wainer)
- Fix kvm_available() on ppc64le (Wainer)

# gpg: Signature made Fri 07 Feb 2020 15:01:56 GMT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* remotes/philmd-gitlab/tags/python-next-20200207: (46 commits)
.readthedocs.yml: specify some minimum python requirements
drop "from __future__ import print_function"
make all Python scripts executable
scripts/signrom: remove Python 2 support, add shebang
tests/qemu-iotests/check: Only check for Python 3 interpreter
scripts: Explicit usage of Python 3 (scripts without __main__)
tests/qemu-iotests: Explicit usage of Python3 (scripts without __main__)
tests/vm: Remove shebang header
tests/acceptance: Remove shebang header
scripts/tracetool: Remove shebang header
scripts/minikconf: Explicit usage of Python 3
scripts: Explicit usage of Python 3 (scripts with __main__)
tests: Explicit usage of Python 3
tests/qemu-iotests: Explicit usage of Python 3 (scripts with __main__)
tests/qemu-iotests/check: Allow use of python3 interpreter
scripts/checkpatch.pl: Only allow Python 3 interpreter
tests/acceptance/migration: Default to -nodefaults
tests/acceptance/migration: Add the 'migration' tag
tests/acceptance/migration: Test EXEC transport when migrating
tests/acceptance/migration: Test UNIX transport when migrating
...

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

show more ...

tests/qemu-iotests: Explicit usage of Python3 (scripts without __main__)

Use the program search path to find the Python 3 interpreter.

Patch created mechanically by running:

$ sed -i "s,^#\!/usr

tests/qemu-iotests: Explicit usage of Python3 (scripts without __main__)

Use the program search path to find the Python 3 interpreter.

Patch created mechanically by running:

$ sed -i "s,^#\!/usr/bin/\(env\ \)\?python$,#\!/usr/bin/env python3," \
$(git grep -lF '#!/usr/bin/env python' \
| xargs grep -L 'if __name__.*__main__')

Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200130163232.10446-11-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- qemu-img: fix info --backing-chain --image-opts
- Error out on image creation with conflicting siz

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- qemu-img: fix info --backing-chain --image-opts
- Error out on image creation with conflicting size options
- Fix external snapshot with VM state
- hmp: Allow using qdev ID for qemu-io command
- Misc code cleanup
- Many iotests improvements

# gpg: Signature made Thu 19 Dec 2019 17:23:11 GMT
# gpg: using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (30 commits)
iotests: Test external snapshot with VM state
hmp: Allow using qdev ID for qemu-io command
block: Activate recursively even for already active nodes
iotests: 211: Remove duplication with VM.blockdev_create()
iotests: 207: Remove duplication with VM.blockdev_create()
iotests: 266: Convert to VM.blockdev_create()
iotests: 237: Convert to VM.blockdev_create()
iotests: 213: Convert to VM.blockdev_create()
iotests: 212: Convert to VM.blockdev_create()
iotests: 210: Convert to VM.blockdev_create()
iotests: 206: Convert to VM.blockdev_create()
iotests: 255: Drop blockdev_create()
iotests: Create VM.blockdev_create()
qcow2: Move error check of local_err near its assignment
iotests: Fix IMGOPTSSYNTAX for nbd
iotests/273: Filter format-specific information
iotests: Add more "_require_drivers" checks to the shell-based tests
MAINTAINERS: fix qcow2-bitmap.c under Dirty Bitmaps header
qcow2: Use offset_into_cluster()
iotests: Support job-complete in run_job()
...

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

show more ...

iotests: 255: Drop blockdev_create()

blockdev_create() is completely unused in this test case, so we can just
drop it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: Fix forbidden use of polling in drained_end
- block: Don't wait for I/O throttling while ex

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: Fix forbidden use of polling in drained_end
- block: Don't wait for I/O throttling while exiting QEMU
- iotests: Use read-zeroes for the null driver to be Valgrind-friendly

# gpg: Signature made Fri 19 Jul 2019 14:30:14 BST
# gpg: using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
iotests: Test quitting with job on throttled node
vl: Drain before (block) job cancel when quitting
iotests: Test commit with a filter on the chain
iotests: Add @has_quit to vm.shutdown()
block: Loop unsafely in bdrv*drained_end()
tests: Extend commit by drained_end test
block: Do not poll in bdrv_do_drained_end()
tests: Lock AioContexts in test-block-iothread
block: Make bdrv_parent_drained_[^_]*() static
block: Add @drained_end_counter
tests: Add job commit by drained_end test
block: Introduce BdrvChild.parent_quiesce_counter
iotests: Set read-zeroes on in null block driver for Valgrind

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

show more ...

iotests: Add @has_quit to vm.shutdown()

If a test has issued a quit command already (which may be useful to do
explicitly because the test wants to show its effects),
QEMUMachine.shutdown() should n

iotests: Add @has_quit to vm.shutdown()

If a test has issued a quit command already (which may be useful to do
explicitly because the test wants to show its effects),
QEMUMachine.shutdown() should not do so again. Otherwise, the VM may
well return an ECONNRESET which will lead QEMUMachine.shutdown() to
killing it, which then turns into a "qemu received signal 9" line.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: AioContext management, part 2
- Avoid recursive block_status call (i.e. lseek() calls) if p

Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: AioContext management, part 2
- Avoid recursive block_status call (i.e. lseek() calls) if possible
- linux-aio: Drop unused BlockAIOCB submission method
- nvme: add Get/Set Feature Timestamp support
- Fix crash on commit job start with active I/O on base node
- Fix crash in bdrv_drained_end
- Fix integer overflow in qcow2 discard

# gpg: Signature made Tue 04 Jun 2019 16:20:02 BST
# gpg: using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (29 commits)
iotests: Fix duplicated diff output on failure
iotests: test big qcow2 shrink
block/io: bdrv_pdiscard: support int64_t bytes parameter
block/qcow2-refcount: add trace-point to qcow2_process_discards
block: Remove bdrv_set_aio_context()
test-bdrv-drain: Use bdrv_try_set_aio_context()
iotests: Attach new devices to node in non-default iothread
virtio-scsi-test: Test attaching new overlay with iothreads
block: Remove wrong bdrv_set_aio_context() calls
blockdev: Use bdrv_try_set_aio_context() for monitor commands
block: Move node without parents to main AioContext
test-block-iothread: BlockBackend AioContext across root node change
test-block-iothread: Test adding parent to iothread node
block: Adjust AioContexts when attaching nodes
scsi-disk: Use qdev_prop_drive_iothread
block: Add qdev_prop_drive_iothread property type
block: Add BlockBackend.ctx
block: Add Error to blk_set_aio_context()
nbd-server: Call blk_set_allow_aio_context_change()
test-block-iothread: Check filter node in test_propagate_mirror
...

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

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iotests: Test cancelling a job and closing the VM

This patch adds a test where we cancel a throttled mirror job and
immediately close the VM before it can be cancelled. Doing so will
invoke bdrv_dr

iotests: Test cancelling a job and closing the VM

This patch adds a test where we cancel a throttled mirror job and
immediately close the VM before it can be cancelled. Doing so will
invoke bdrv_drain_all() while the mirror job tries to drain the
throttled node. When bdrv_drain_all_end() tries to lift its drain on
the throttle node, the job will exit and replace the current root node
of the BB drive0 (which is the job's filter node) by the throttle node.
Before the previous patch, this replacement did not increase drive0's
quiesce_counter by a sufficient amount, so when
bdrv_parent_drained_end() (invoked by bdrv_do_drained_end(), invoked by
bdrv_drain_all_end()) tried to end the drain on all of the throttle
node's parents, it decreased drive0's quiesce_counter below 0 -- which
fails an assertion.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

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iotests: Test commit job start with concurrent I/O

This tests that concurrent requests are correctly drained before making
graph modifications instead of running into assertions in
bdrv_replace_node

iotests: Test commit job start with concurrent I/O

This tests that concurrent requests are correctly drained before making
graph modifications instead of running into assertions in
bdrv_replace_node().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>

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