Commit Graph

63386 Commits

Author SHA1 Message Date
Markus Armbruster
4ff184689b qobject: New qobject_from_vjsonf_nofail(), qdict_from_vjsonf_nofail()
Every printf()-like function sooner or later needs its vprintf()-like
buddy.  The next commit will need qobject_from_jsonf_nofail()'s buddy,
and qdict_from_jsonf_nofail()'s buddy will be used later in this
series.  Add both.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-8-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Markus Armbruster
6ce80fd803 qobject: Replace qobject_from_jsonf() by qobject_from_jsonf_nofail()
Commit ab45015a96 "qobject: Let qobject_from_jsonf() fail instead of
abort" fails to accomplish its stated aim: the function can still
abort due to its use of &error_abort.

Its rationale for letting it fail is that all remaining users cope
fine with failure.  Well, they're just fine with aborting, too; it's
what they do on failure.

Simply reverting the broken commit would bring back the unfortunate
asymmetry between qobject_from_jsonf() and qobject_from_jsonv(): one
aborts, the other returns null.  So also rename it to
qobject_from_jsonf_nofail().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-7-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Eric Blake
bb340eb238 libqtest: Document calling conventions
We have two flavors of vararg usage in qtest: qtest_hmp() etc. work
like sprintf(), and qtest_qmp() etc. work like qobject_from_jsonf().
Spell that out in the comments.

Also add GCC_FMT_ATTR() to qtest_hmp() etc. so that the compiler can
flag incorrect use.

We have some cleanup work to do before we can do the same for
qtest_qmp() etc.  This would get us the same better-than-nothing
checking we already have for qobject_from_jsonf(): common incorrect
uses of supported conversion specifications will be flagged
(e.g. passing a double for %d), but use of unsupported ones won't.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Rebased, comment wording tweaked, commit message rewritten]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180806065344.7103-6-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Markus Armbruster
055a1efc7c libqtest: Remove qtest_qmp_discard_response() & friends
qtest_qmp_discard_response(...) is shorthand for
qobject_unref(qtest_qmp(...), except it's not actually shorter.
Moreover, the presence of these functions encourage sloppy testing.
Remove them from libqtest.  Add them as macros to the tests that use
them, with a TODO comment asking for cleanup.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-5-armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
2018-08-16 08:42:06 +02:00
Markus Armbruster
be62e1724f libqtest: Clean up how we read the QMP greeting
qtest_init() still uses the qtest_qmp_discard_response(s, "") hack to
receive the greeting, even though we have qtest_qmp_receive() since
commit 66e0c7b187.  Put it to use.

Bonus: gets rid of an empty format string.  A step towards
compile-time format string checking without triggering
-Wformat-zero-length.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-4-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Markus Armbruster
f94648fe3d libqtest: Clean up how we read device_del messages
qtest_qmp_device_del() still uses the qmp("") hack to receive a
message, even though we have qmp_receive() since commit 66e0c7b187.
Put it to use.

Bonus: gets rid of empty format strings.  A step towards compile-time
format string checking without triggering -Wformat-zero-length.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-3-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Markus Armbruster
4277f1ebd9 libqtest: Rename functions to send QMP messages
The functions to receive messages are called qtest_qmp_receive() and
qmp_receive(), qmp_fd_receive().  The ones to send messages are called
qtest_async_qmp(), qtest_async_qmpv(), qmp_async(), qmp_fd_send(),
qmp_fd_sendv().  Inconsistent.  Rename the *_async* ones to
qmp_send(), qtest_qmp_send(), qtest_qmp_vsend().  Rename
qmp_fd_sendv() to qmp_fd_vsend().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180806065344.7103-2-armbru@redhat.com>
2018-08-16 08:42:06 +02:00
Peter Maydell
d3bd57d9f6 Block layer patches:
- Remove deprecated -drive options for geometry/serial/addr
 - luks: Allow shared writers if the parents allow them (share-rw=on)
 - qemu-img: Fix error when trying to convert to encrypted target image
 - mirror: Fail gracefully for source == target
 - I/O throttling: Fix behaviour during drain (always ignore the limits)
 - bdrv_reopen() related fixes for bs->options/explicit_options content
 - Documentation improvements
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- Remove deprecated -drive options for geometry/serial/addr
- luks: Allow shared writers if the parents allow them (share-rw=on)
- qemu-img: Fix error when trying to convert to encrypted target image
- mirror: Fail gracefully for source == target
- I/O throttling: Fix behaviour during drain (always ignore the limits)
- bdrv_reopen() related fixes for bs->options/explicit_options content
- Documentation improvements

# gpg: Signature made Wed 15 Aug 2018 12:11:43 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (21 commits)
  qapi: block: Remove mentions of error types which were removed
  block: Simplify append_open_options()
  block: Update bs->options if bdrv_reopen() succeeds
  block: Simplify bdrv_reopen_abort()
  block: Remove children options from bs->{options,explicit_options}
  qdict: Make qdict_extract_subqdict() accept dst = NULL
  block: drop empty .bdrv_close handlers
  block: make .bdrv_close optional
  qemu-img: fix regression copying secrets during convert
  mirror: Fail gracefully for source == target
  qapi/block: Document restrictions for node names
  block: Remove dead deprecation warning code
  block: Remove deprecated -drive option serial
  block: Remove deprecated -drive option addr
  block: Remove deprecated -drive geometry options
  luks: Allow share-rw=on
  throttle-groups: Don't allow timers without throttled requests
  qemu-iotests: Update 093 to improve the draining test
  throttle-groups: Skip the round-robin if a member is being drained
  qemu-iotests: Test removing a throttle group member with a pending timer
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-15 22:11:08 +01:00
Peter Maydell
c146b54c7f Miscellaneous patches for 2018-08-15
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Merge remote-tracking branch 'remotes/armbru/tags/pull-misc-2018-08-15' into staging

Miscellaneous patches for 2018-08-15

# gpg: Signature made Wed 15 Aug 2018 07:15:31 BST
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-misc-2018-08-15:
  monitor: fix oob command leak
  tests: fix crumple/recursive leak
  qapi: Fix some pycodestyle-3 complaints
  tests: change /0.15/* tests to /qmp/*
  qmp-shell: learn to send commands with quoted arguments

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-15 20:20:34 +01:00
Peter Maydell
1d746ee95d Block and testing patches for 3.1
- aio fixes by me
 - nvme fixes by Paolo and me
 - test improvements by Peter, Phil and me
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Merge remote-tracking branch 'remotes/famz/tags/block-and-testing-pull-request' into staging

Block and testing patches for 3.1

- aio fixes by me
- nvme fixes by Paolo and me
- test improvements by Peter, Phil and me

# gpg: Signature made Wed 15 Aug 2018 04:11:43 BST
# gpg:                using RSA key CA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021  AD56 CA35 624C 6A91 71C6

* remotes/famz/tags/block-and-testing-pull-request:
  aio-posix: Improve comment around marking node deleted
  tests/vm: Add vm-build-all/vm-clean-all in help text
  tests/vm: Use make's --output-sync option
  tests/vm: Bump guest RAM up from 2G to 4G
  tests/vm: Propagate V=1 down into the make inside the VM
  tests/vm: Pass the jobs parallelism setting to 'make check'
  tests: vm: Add vm-clean-all
  tests: Add centos VM testing
  tests: Allow overriding archive path with SRC_ARCHIVE
  tests: Add an option for snapshot (default: off)
  docker: Install more packages in centos7
  aio: Do aio_notify_accept only during blocking aio_poll
  aio-posix: Don't count ctx->notifier as progress when polling
  nvme: simplify plug/unplug
  nvme: Fix nvme_init error handling
  tests/vm: Add flex and bison to the vm image
  tests/vm: Only use -cpu 'host' if KVM is available

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-15 13:29:53 +01:00
Peter Maydell
48a539df4a target-arm queue:
* Implement more of ARMv6-M support
  * Support direct execution from non-RAM regions;
    use this to implmeent execution from small (<1K) MPU regions
  * GICv2: implement the virtualization extensions
  * support a virtualization-capable GICv2 in the virt and
    xlnx-zynqmp boards
  * arm: Fix return code of arm_load_elf() so we can detect
    failure to load the file correctly
  * Implement HCR_EL2.TGE ("trap general exceptions") bit
  * Implement tailchaining for M profile cores
  * Fix bugs in SVE compare, saturating add/sub, WHILE, MOVZ
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20180814' into staging

target-arm queue:
 * Implement more of ARMv6-M support
 * Support direct execution from non-RAM regions;
   use this to implmeent execution from small (<1K) MPU regions
 * GICv2: implement the virtualization extensions
 * support a virtualization-capable GICv2 in the virt and
   xlnx-zynqmp boards
 * arm: Fix return code of arm_load_elf() so we can detect
   failure to load the file correctly
 * Implement HCR_EL2.TGE ("trap general exceptions") bit
 * Implement tailchaining for M profile cores
 * Fix bugs in SVE compare, saturating add/sub, WHILE, MOVZ

# gpg: Signature made Tue 14 Aug 2018 17:23:38 BST
# gpg:                using RSA key 3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20180814: (45 commits)
  target/arm: Fix typo in helper_sve_movz_d
  target/arm: Reorganize SVE WHILE
  target/arm: Fix typo in do_sat_addsub_64
  target/arm: Fix sign of sve_cmpeq_ppzw/sve_cmpne_ppzw
  target/arm: Implement tailchaining for M profile cores
  target/arm: Restore M-profile CONTROL.SPSEL before any tailchaining
  target/arm: Initialize exc_secure correctly in do_v7m_exception_exit()
  target/arm: Improve exception-taken logging
  target/arm: Treat SCTLR_EL1.M as if it were zero when HCR_EL2.TGE is set
  target/arm: Provide accessor functions for HCR_EL2.{IMO, FMO, AMO}
  target/arm: Honour HCR_EL2.TGE when raising synchronous exceptions
  target/arm: Honour HCR_EL2.TGE and MDCR_EL2.TDE in debug register access checks
  target/arm: Mask virtual interrupts if HCR_EL2.TGE is set
  arm: Fix return code of arm_load_elf
  arm/virt: Add support for GICv2 virtualization extensions
  xlnx-zynqmp: Improve GIC wiring and MMIO mapping
  intc/arm_gic: Improve traces
  intc/arm_gic: Implement maintenance interrupt generation
  intc/arm_gic: Implement gic_update_virt() function
  intc/arm_gic: Implement the virtual interface registers
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-15 12:00:53 +01:00
Peter Krempa
b5fc2d3066 qapi: block: Remove mentions of error types which were removed
Most of the various error classes were removed prior to the 1.2 release.
Remove mentions of the error classes which did not make it.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
261dbcb18f block: Simplify append_open_options()
This function returns a BDS's driver-specific options, excluding also
those from its children. Since we have just removed all children
options from bs->options there's no need to do this last step.

We allow references to children, though ("backing": "node0"), so those
we still have to remove.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
4c8350fe17 block: Update bs->options if bdrv_reopen() succeeds
If bdrv_reopen() succeeds then bs->explicit_options is updated with
the new values, but bs->options never changes.

Here's an example:

   { "execute": "blockdev-add",
     "arguments": {
       "driver": "qcow2",
       "node-name": "hd0",
       "overlap-check": "all",
       "file": {
         "driver": "file",
         "filename": "hd0.qcow2"
       }
     }
   }

After this, both bs->options and bs->explicit_options contain
"overlap-check": "all".

Now let's change that using qemu-io's reopen command:

   (qemu) qemu-io hd0 "reopen -o overlap-check=none"

After this, bs->explicit_options contains the new value but
bs->options still keeps the old one.

This patch updates bs->options after a BDS has been successfully
reopened.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
1bab38e7bd block: Simplify bdrv_reopen_abort()
If a bdrv_reopen_multiple() call fails, then the explicit_options
QDict has to be deleted for every entry in the reopen queue. This must
happen regardless of whether that entry's bdrv_reopen_prepare() call
succeeded or not.

This patch simplifies the cleanup code a bit.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
2f624b80ba block: Remove children options from bs->{options,explicit_options}
When bdrv_open_inherit() opens a BlockDriverState the options QDict
can contain options for some of its children, passed in the form of
child-name.option=value

So while each child is opened with that subset of options, those same
options remain stored in the parent BDS, leaving (at least) two copies
of each one of them ("child-name.option=value" in the parent and
"option=value" in the child).

Having the children options stored in the parent is unnecessary and it
can easily lead to an inconsistent state:

  $ qemu-img create -f qcow2 hd0.qcow2 10M
  $ qemu-img create -f qcow2 -b hd0.qcow2 hd1.qcow2
  $ qemu-img create -f qcow2 -b hd1.qcow2 hd2.qcow2

  $ $QEMU -drive file=hd2.qcow2,node-name=hd2,backing.node-name=hd1

This opens a chain of images hd0 <- hd1 <- hd2. Now let's remove hd1
using block_stream:

  (qemu) block_stream hd2 0 hd0.qcow2

After this hd2 contains backing.node-name=hd1, which is no longer
correct because hd1 doesn't exist anymore.

This patch removes all children options from the parent dictionaries
at the end of bdrv_open_inherit() and bdrv_reopen_queue_child().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
655b4b67e3 qdict: Make qdict_extract_subqdict() accept dst = NULL
This function extracts all options from a QDict starting with a
certain prefix and puts them in a new QDict.

We'll have a couple of cases where we simply want to discard those
options instead of copying them, and that's what this patch does.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Vladimir Sementsov-Ogievskiy
f66b1f0e27 block: drop empty .bdrv_close handlers
.bdrv_close handler is optional after previous commit, no needs to keep
empty functions more.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Vladimir Sementsov-Ogievskiy
3c005293c2 block: make .bdrv_close optional
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Daniel P. Berrangé
8d65a3ccfd qemu-img: fix regression copying secrets during convert
When the convert command is creating an output file that needs
secrets, we need to ensure those secrets are passed to both the
blk_new_open and bdrv_create API calls.

This is done by qemu-img extracting all opts matching the name
suffix "key-secret". Unfortunately the code doing this was run after the
call to bdrv_create(), which meant the QemuOpts it was extracting
secrets from was now empty.

Previously this worked by luks as a bug meant the "key-secret"
parameters were not purged from the QemuOpts. This bug was fixed in

  commit b76b4f6045
  Author: Kevin Wolf <kwolf@redhat.com>
  Date:   Thu Jan 11 16:18:08 2018 +0100

    qcow2: Use visitor for options in qcow2_create()

Exposing the latent bug in qemu-img. This fix simply moves the copying
of secrets to before the bdrv_create() call.

Cc: qemu-stable@nongnu.org
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
86fae10c64 mirror: Fail gracefully for source == target
blockdev-mirror with the same node for source and target segfaults
today: A node is in its own backing chain, so mirror_start_job() decides
that this is an active commit. When adding the intermediate nodes with
block_job_add_bdrv(), it starts the iteration through the subchain with
the backing file of source, though, so it never reaches target and
instead runs into NULL at the base.

While we could fix that by starting with source itself, there is no
point in allowing mirroring a node into itself and I wouldn't be
surprised if this caused more problems later.

So just check for this scenario and error out.

Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
dbfdf6cb36 qapi/block: Document restrictions for node names
blockdev-add fails if an invalid node name is given, so we should
document what a valid node name even is.

Reported-by: Cong Li <coli@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Cong Li <coli@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
6984eb8da2 block: Remove dead deprecation warning code
This reinstates commit 6266e900b8,
which was temporarily reverted for the 3.0 release so that libvirt gets
some extra time to update their command lines.

We removed all options from the 'deprecated' array, so the code is dead
and can be removed as well.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
572023f7b2 block: Remove deprecated -drive option serial
This reinstates commit b008326744,
which was temporarily reverted for the 3.0 release so that libvirt gets
some extra time to update their command lines.

The -drive option serial was deprecated in QEMU 2.10. It's time to
remove it.

Tests need to be updated to set the serial number with -global instead
of using the -drive option.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
7f8fc97155 block: Remove deprecated -drive option addr
This reinstates commit eae3bd1eb7,
which was temporarily reverted for the 3.0 release so that libvirt gets
some extra time to update their command lines.

The -drive option addr was deprecated in QEMU 2.10. It's time to remove
it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
b24ec3c462 block: Remove deprecated -drive geometry options
This reinstates commit a7aff6dd10,
which was temporarily reverted for the 3.0 release so that libvirt gets
some extra time to update their command lines.

The -drive options cyls, heads, secs and trans were deprecated in
QEMU 2.10. It's time to remove them.

hd-geo-test tested both the old version with geometry options in -drive
and the new one with -device. Therefore the code using -drive doesn't
have to be replaced there, we just need to remove the -drive test cases.
This in turn allows some simplification of the code.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 12:50:39 +02:00
Fam Zheng
497da8236a luks: Allow share-rw=on
Format drivers such as qcow2 don't allow sharing the same image between
two QEMU instances in order to prevent image corruptions, because of
metadata cache. LUKS driver don't modify metadata except for when
creating image, so it is safe to relax the permission. This makes
share-rw=on property work on virtual devices.

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
25b8e4db7f throttle-groups: Don't allow timers without throttled requests
Commit 6fccbb475b fixed a bug caused by
QEMU attempting to remove a throttle group member with no pending
requests but an active timer set. This was the result of a previous
bdrv_drained_begin() call processing the throttled requests but
leaving the timer untouched.

Although the commit does solve the problem, the situation shouldn't
happen in the first place. If we try to drain a throttle group member
which has a timer set, we should cancel the timer instead of ignoring
it.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
3db3e9c621 qemu-iotests: Update 093 to improve the draining test
The previous patch fixes a problem in which draining a block device
with more than one throttled request can make it wait first for the
completion of requests in other members of the same group.

This patch updates test_remove_group_member() in iotest 093 to
reproduce that scenario. This updated test would hang QEMU without the
fix from the previous patch.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
5d8e4ca035 throttle-groups: Skip the round-robin if a member is being drained
In the throttling code after an I/O request has been completed the
next one is selected from a different member using a round-robin
algorithm. This ensures that all members get a chance to finish their
pending I/O requests.

However, if a group member has its I/O limits disabled (because it's
being drained) then we should always give it priority in order to have
all its pending requests finished as soon as possible.

If we don't do this we could have a member in the process of being
drained waiting for the throttled requests of other members, for which
the I/O limits still apply.

This can have additional consequences: if we're running in qtest mode
(with QEMU_CLOCK_VIRTUAL) then timers can only fire if we advance the
clock manually, so attempting to drain a block device can hang QEMU in
the BDRV_POLL_WHILE() loop at the end of bdrv_do_drained_begin().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Alberto Garcia
ef7a6a3c2a qemu-iotests: Test removing a throttle group member with a pending timer
A throttle group can have several members, and each one of them can
have several pending requests in the queue.

The requests are processed in a round-robin fashion, so the algorithm
decides the drive that is going to run the next request and sets a
timer in it. Once the timer fires and the throttled request is run
then the next drive from the group is selected and a new timer is set.

If the user tried to remove a drive from a group and that drive had a
timer set then the code was not taking care of setting up a new timer
in one of the remaining members of the group, freezing their I/O.

This problem was fixed in 6fccbb475b,
and this patch adds a new test case that reproduces this exact
scenario.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
Kevin Wolf
f62492bb8d block/qapi: Fix memory leak in qmp_query_blockstats()
For BlockBackends that are skipped in query-blockstats, we would leak
info since commit 567dcb31. Allocate info only later to avoid the memory
leak.

Fixes: CID 1394727
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
2018-08-15 12:50:39 +02:00
Marc-André Lureau
cb9ec42f33 monitor: fix oob command leak
Spotted by ASAN, during make check...

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7f8e27262c48 in malloc (/lib64/libasan.so.5+0xeec48)
    #1 0x7f8e26a5f3c5 in g_malloc (/lib64/libglib-2.0.so.0+0x523c5)
    #2 0x555ab67078a8 in qstring_from_str /home/elmarco/src/qq/qobject/qstring.c:67
    #3 0x555ab67071e4 in qstring_new /home/elmarco/src/qq/qobject/qstring.c:24
    #4 0x555ab6713fbf in qstring_from_escaped_str /home/elmarco/src/qq/qobject/json-parser.c:144
    #5 0x555ab671738c in parse_literal /home/elmarco/src/qq/qobject/json-parser.c:506
    #6 0x555ab67179c3 in parse_value /home/elmarco/src/qq/qobject/json-parser.c:569
    #7 0x555ab6715123 in parse_pair /home/elmarco/src/qq/qobject/json-parser.c:306
    #8 0x555ab6715483 in parse_object /home/elmarco/src/qq/qobject/json-parser.c:357
    #9 0x555ab671798b in parse_value /home/elmarco/src/qq/qobject/json-parser.c:561
    #10 0x555ab6717a6b in json_parser_parse_err /home/elmarco/src/qq/qobject/json-parser.c:592
    #11 0x555ab4fd4dcf in handle_qmp_command /home/elmarco/src/qq/monitor.c:4257
    #12 0x555ab6712c4d in json_message_process_token /home/elmarco/src/qq/qobject/json-streamer.c:105
    #13 0x555ab67e01e2 in json_lexer_feed_char /home/elmarco/src/qq/qobject/json-lexer.c:323
    #14 0x555ab67e0af6 in json_lexer_feed /home/elmarco/src/qq/qobject/json-lexer.c:373
    #15 0x555ab6713010 in json_message_parser_feed /home/elmarco/src/qq/qobject/json-streamer.c:124
    #16 0x555ab4fd58ec in monitor_qmp_read /home/elmarco/src/qq/monitor.c:4337
    #17 0x555ab6559df2 in qemu_chr_be_write_impl /home/elmarco/src/qq/chardev/char.c:175
    #18 0x555ab6559e95 in qemu_chr_be_write /home/elmarco/src/qq/chardev/char.c:187
    #19 0x555ab6560127 in fd_chr_read /home/elmarco/src/qq/chardev/char-fd.c:66
    #20 0x555ab65d9c73 in qio_channel_fd_source_dispatch /home/elmarco/src/qq/io/channel-watch.c:84
    #21 0x7f8e26a598ac in g_main_context_dispatch (/lib64/libglib-2.0.so.0+0x4c8ac)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180809114417.28718-4-marcandre.lureau@redhat.com>
[Screwed up in commit b27314567d]
Cc: qemu-stable@nongnu.org
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 08:12:57 +02:00
Marc-André Lureau
42478dacc8 tests: fix crumple/recursive leak
Spotted by ASAN:

=================================================================
==27907==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4120 byte(s) in 1 object(s) allocated from:
    #0 0x7f913458ce50 in calloc (/lib64/libasan.so.5+0xeee50)
    #1 0x7f9133fd641d in g_malloc0 (/lib64/libglib-2.0.so.0+0x5241d)
    #2 0x5561c6643c95 in qdict_crumple_test_recursive /home/elmarco/src/qq/tests/check-block-qdict.c:438
    #3 0x7f9133ff7c49  (/lib64/libglib-2.0.so.0+0x73c49)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180809114417.28718-2-marcandre.lureau@redhat.com>
[Screwed up in commit 2860b2b2cb]
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 08:12:19 +02:00
Markus Armbruster
b736e25a18 qapi: Fix some pycodestyle-3 complaints
Fix the following issues:

    common.py:873:13: E129 visually indented line with same indent as next logical line
    common.py:1766:5: E741 ambiguous variable name 'l'
    common.py:1784:1: E305 expected 2 blank lines after class or function definition, found 1
    common.py:1833:1: E305 expected 2 blank lines after class or function definition, found 1
    common.py:1843:1: E305 expected 2 blank lines after class or function definition, found 1
    visit.py:181:18: E127 continuation line over-indented for visual indent

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180621083551.775-1-armbru@redhat.com>
[Fixup squashed in:]
Message-ID: <871sd0nzw9.fsf@dusky.pond.sub.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2018-08-15 07:24:22 +02:00
Marc-André Lureau
214e4a5b38 tests: change /0.15/* tests to /qmp/*
Presumably 0.15 was the version it was first introduced, but
qmp keeps evolving. There is no point in having that version
as test prefix, 'qmp' makes more sense here.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180326150916.9602-12-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 07:24:22 +02:00
Marc-André Lureau
fcfab75410 qmp-shell: learn to send commands with quoted arguments
Use shlex to split the CLI command, respecting quoted arguments, and
also comments. This allows to call for ex:

(QEMU) human-monitor-command command-line="screendump /dev/null"
{"execute": "human-monitor-command", "arguments": {"command-line": "screendump /dev/null"}}

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180326150916.9602-3-marcandre.lureau@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-08-15 07:24:22 +02:00
Fam Zheng
37a81812f7 aio-posix: Improve comment around marking node deleted
The counter is for qemu_lockcnt_inc/dec sections (read side),
qemu_lockcnt_lock/unlock is for the write side.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180803063917.30292-1-famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
af7e916869 tests/vm: Add vm-build-all/vm-clean-all in help text
Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180727083445.21436-1-famz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Peter Maydell
f2d4becdc7 tests/vm: Use make's --output-sync option
Use make's --output-sync option when running tests inside VMs,
so that if we're building with parallelization the output doesn't
get scrambled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180803085230.30574-6-peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Peter Maydell
eb2712f568 tests/vm: Bump guest RAM up from 2G to 4G
Currently we run the guests in a VM which is given only 2G of RAM.
Since the guests are configured without any swap space, builds
can fail because the system runs out of memory and kills the
compiler, especially if the job count is set for a lot of
parallelism. Bump the setting up from 2G to 4G to give us some
more headroom.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180803085230.30574-5-peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Peter Maydell
41e3340afe tests/vm: Propagate V=1 down into the make inside the VM
Invoking 'make vm-build-freebsd' and friends with V=1 should
propagate that verbosity setting down into the build run
inside the VM. Make sure we do that. This brings it into
line with how the container tests handle V=1.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180803085230.30574-4-peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Peter Maydell
ebb61f804d tests/vm: Pass the jobs parallelism setting to 'make check'
Our test suite works for parallel execution too, and this can
noticeably speed up a test run; pass the 'jobs' setting to
it as well as to the build proper.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180803085230.30574-3-peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
ebe95fa094 tests: vm: Add vm-clean-all
The images are big. Add a rule to clean up easily.

Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180716020008.31468-1-famz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
1bd2698808 tests: Add centos VM testing
This one does docker testing in the VM. It is intended to replace the
native docker testing on patchew testers.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180712012829.20231-5-famz@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
73fb4f1de3 tests: Allow overriding archive path with SRC_ARCHIVE
In VM based tests, the source archive is created in host, we don't have
to run archive-source.sh again, as it complicates the Makefile and
scripts.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180712012829.20231-4-famz@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
983c2a777b tests: Add an option for snapshot (default: off)
Not using snapshot has the benefit of automatically persisting useful
test harnesses, such as docker images and ccache database. Although it
will lose some cleanness, it is imaginably useful for patchew.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180712012829.20231-2-famz@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
8158ed48bb docker: Install more packages in centos7
This makes test-block work.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180711065813.14894-1-famz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
b37548fcd1 aio: Do aio_notify_accept only during blocking aio_poll
An aio_notify() pairs with an aio_notify_accept(). The former should
happen in the main thread or a vCPU thread, and the latter should be
done in the IOThread.

There is one rare case that the main thread or vCPU thread may "steal"
the aio_notify() event just raised by itself, in bdrv_set_aio_context()
[1]. The sequence is like this:

    main thread                     IO Thread
    ===============================================================
    bdrv_drained_begin()
      aio_disable_external(ctx)
                                    aio_poll(ctx, true)
                                      ctx->notify_me += 2
    ...
    bdrv_drained_end()
      ...
        aio_notify()
    ...
    bdrv_set_aio_context()
      aio_poll(ctx, false)
[1]     aio_notify_accept(ctx)
                                      ppoll() /* Hang! */

[1] is problematic. It will clear the ctx->notifier event so that
the blocked ppoll() will not return.

(For the curious, this bug was noticed when booting a number of VMs
simultaneously in RHV.  One or two of the VMs will hit this race
condition, making the VIRTIO device unresponsive to I/O commands. When
it hangs, Seabios is busy waiting for a read request to complete (read
MBR), right after initializing the virtio-blk-pci device, using 100%
guest CPU. See also https://bugzilla.redhat.com/show_bug.cgi?id=1562750
for the original bug analysis.)

aio_notify() only injects an event when ctx->notify_me is set,
correspondingly aio_notify_accept() is only useful when ctx->notify_me
_was_ set. Move the call to it into the "blocking" branch. This will
effectively skip [1] and fix the hang.

Furthermore, blocking aio_poll is only allowed on home thread
(in_aio_context_home_thread), because otherwise two blocking
aio_poll()'s can steal each other's ctx->notifier event and cause
hanging just like described above.

Cc: qemu-stable@nongnu.org
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180809132259.18402-3-famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00
Fam Zheng
70232b5253 aio-posix: Don't count ctx->notifier as progress when polling
The same logic exists in fd polling. This change is especially important
to avoid busy loop once we limit aio_notify_accept() to blocking
aio_poll().

Cc: qemu-stable@nongnu.org
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180809132259.18402-2-famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2018-08-15 10:12:35 +08:00