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  1. Dec 14, 2022
    • Markus Armbruster's avatar
      qapi chardev: Elide redundant has_FOO in generated C · 8de69efa
      Markus Armbruster authored 
      
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/char.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221104160712.3005652-12-armbru@redhat.com>
      8de69efa
    • Markus Armbruster's avatar
      qapi block: Elide redundant has_FOO in generated C · 54fde4ff
      Markus Armbruster authored 
      
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/block*.json.

Said commit explains the transformation in more detail.

There is one instance of the invariant violation mentioned there:
qcow2_signal_corruption() passes false, "" when node_name is an empty
string.  Take care to pass NULL then.

The previous two commits cleaned up two more.

Additionally, helper bdrv_latency_histogram_stats() loses its output
parameters and returns a value instead.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Hanna Reitz <hreitz@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Message-Id: <20221104160712.3005652-11-armbru@redhat.com>
[Fixes for #ifndef LIBRBD_SUPPORTS_ENCRYPTION and MacOS squashed in]
      54fde4ff
  3. Dec 13, 2022
    • Markus Armbruster's avatar
      nbd/server: Clean up abuse of BlockExportOptionsNbd member @arg · 8461b4d6
      Markus Armbruster authored 
      
block-export-add argument @name defaults to the value of argument
@node-name.

nbd_export_create() implements this by copying @node_name to @name.
It leaves @has_node_name false, violating the "has_node_name ==
!!node_name" invariant.  Unclean.  Falls apart when we elide
@has_node_name (next commit): then QAPI frees the same value twice,
once for @node_name and once @name.  iotest 307 duly explodes.

Goes back to commit c62d24e9 "blockdev-nbd: Boxed argument type for
nbd-server-add" (v5.0.0).  Got moved from qmp_nbd_server_add() to
nbd_export_create() (commit 56ee8626), then copied back (commit
b6076afc).  Commit 8675cbd6 "nbd: Utilize QAPI_CLONE for type
conversion" (v5.2.0) cleaned up the copy in qmp_nbd_server_add()
noting

    Second, our assignment to arg->name is fishy: the generated QAPI code
    for qapi_free_NbdServerAddOptions does not visit arg->name if
    arg->has_name is false, but if it DID visit it, we would have
    introduced a double-free situation when arg is finally freed.

Exactly.  However, the copy in nbd_export_create() remained dirty.

Clean it up.  Since the value stored in member @name is not actually
used outside this function, use a local variable instead of modifying
the QAPI object.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
Cc: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Cc: qemu-block@nongnu.org
Message-Id: <20221104160712.3005652-10-armbru@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Reviewed-by: default avatarVladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
      8461b4d6
    • Markus Armbruster's avatar
      blockdev: Clean up abuse of DriveBackup member format · 04658a5b
      Markus Armbruster authored 
      
drive-backup argument @format defaults to the format of the source
unless @mode is "existing".

drive_backup_prepare() implements this by copying the source's
@format_name to DriveBackup member @format.  It leaves @has_format
false, violating the "has_format == !!format" invariant.  Unclean.
Falls apart when we elide @has_format (commit after next): then QAPI
passes @format, which is a string constant, to g_free().  iotest 056
duly explodes.

Clean it up.  Since the value stored in member @format is not actually
used outside this function, use a local variable instead of modifying
the QAPI object.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Hanna Reitz <hreitz@redhat.com>
Cc: qemu-block@nongnu.org
Message-Id: <20221104160712.3005652-9-armbru@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
      04658a5b
    • Markus Armbruster's avatar
      qapi audio: Elide redundant has_FOO in generated C · ceb19c8f
      Markus Armbruster authored 
      
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/audio.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Additionally, helper get_str() loses its @has_dst parameter.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221104160712.3005652-8-armbru@redhat.com>
      ceb19c8f
    • Markus Armbruster's avatar
      qapi acpi: Elide redundant has_FOO in generated C · b94ba62f
      Markus Armbruster authored 
      
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/acpi.py.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Ani Sinha <ani@anisinha.ca>
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarIgor Mammedov <imammedo@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-7-armbru@redhat.com>
      b94ba62f
    • Markus Armbruster's avatar
      qapi tests: Elide redundant has_FOO in generated C · 4b2fc7db
      Markus Armbruster authored 
      
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for
tests/qapi-schema/qapi-schema-test.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-6-armbru@redhat.com>
      4b2fc7db
    • Markus Armbruster's avatar
      qapi: Start to elide redundant has_FOO in generated C · 44ea9d9b
      Markus Armbruster authored 
      
In QAPI, absent optional members are distinct from any present value.
We thus represent an optional schema member FOO as two C members: a
FOO with the member's type, and a bool has_FOO.  Likewise for function
arguments.

However, has_FOO is actually redundant for a pointer-valued FOO, which
can be null only when has_FOO is false, i.e. has_FOO == !!FOO.  Except
for arrays, where we a null FOO can also be a present empty array.

The redundant has_FOO are a nuisance to work with.  Improve the
generator to elide them.  Uses of has_FOO need to be replaced as
follows.

Tests of has_FOO become the equivalent comparison of FOO with null.
For brevity, this is commonly done by implicit conversion to bool.

Assignments to has_FOO get dropped.

Likewise for arguments to has_FOO parameters.

Beware: code may violate the invariant has_FOO == !!FOO before the
transformation, and get away with it.  The above transformation can
then break things.  Two cases:

* Absent: if code ignores FOO entirely when !has_FOO (except for
  freeing it if necessary), even non-null / uninitialized FOO works.
  Such code is known to exist.

* Present: if code ignores FOO entirely when has_FOO, even null FOO
  works.  Such code should not exist.

In both cases, replacing tests of has_FOO by FOO reverts their sense.
We have to fix the value of FOO then.

To facilitate review of the necessary updates to handwritten code, add
means to opt out of this change, and opt out for all QAPI schema
modules where the change requires updates to handwritten code.  The
next few commits will remove these opt-outs in reviewable chunks, then
drop the means to opt out.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-5-armbru@redhat.com>
      44ea9d9b
    • Markus Armbruster's avatar
      docs/devel/qapi-code-gen: Extend example for next commit's change · 94f9bd33
      Markus Armbruster authored 
      
The next commit will change the code generated for some optional
members.  The example schema contains an optional member affected by
the change.  Add one that is not affected.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-4-armbru@redhat.com>
      94f9bd33
    • Markus Armbruster's avatar
      qapi: Tidy up whitespace in generated code · 7df18461
      Markus Armbruster authored 
      
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-3-armbru@redhat.com>
      7df18461
    • Markus Armbruster's avatar
      docs/devel/qapi-code-gen: Update example to match current code · a680ea07
      Markus Armbruster authored 
      
Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221104160712.3005652-2-armbru@redhat.com>
      a680ea07
  5. Dec 07, 2022
  7. Dec 05, 2022
  9. Dec 04, 2022
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-request-2022-12-04' of https://gitlab.com/thuth/qemu into staging · aaf47c7e
      Stefan Hajnoczi authored 
      * Fix potential undefined behavior in cleanup of migration-test
* Fix a s390x instruction that causes Java to crash
* Fix a typo in a comment in next-fb.c

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# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* tag 'pull-request-2022-12-04' of https://gitlab.com/thuth/qemu

:
  hw/display/next-fb: Fix comment typo
  target/s390x/tcg: Fix and improve the SACF instruction
  tests/qtest/migration-test: Fix unlink error and memory leaks

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      aaf47c7e
    • Stefan Hajnoczi's avatar
      Merge tag 'pull-loongarch-20221202' of https://gitlab.com/gaosong/qemu into staging · 777fa063
      Stefan Hajnoczi authored 
      pull for 7.2-rc4

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* tag 'pull-loongarch-20221202' of https://gitlab.com/gaosong/qemu

:
  hw/loongarch/virt: Add cfi01 pflash device

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      777fa063
    • Stefan Hajnoczi's avatar
      Merge tag 'nvme-next-pull-request' of git://git.infradead.org/qemu-nvme into staging · bb94fa86
      Stefan Hajnoczi authored 
      hw/nvme fixes

  * fixes for aio cancellation in commands that may issue several
    aios

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* tag 'nvme-next-pull-request' of git://git.infradead.org/qemu-nvme

:
  hw/nvme: remove copy bh scheduling
  hw/nvme: fix aio cancel in dsm
  hw/nvme: fix aio cancel in zone reset
  hw/nvme: fix aio cancel in flush
  hw/nvme: fix aio cancel in format

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      bb94fa86
    • Stefan Hajnoczi's avatar
      Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging · 4bd638ac
      Stefan Hajnoczi authored 
      * Fix MMX instructions for system emulators
* Fix uninitialized TranslateFault after canonical address checks

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu

:
  target/i386: Always completely initialize TranslateFault
  target/i386: allow MMX instructions with CR4.OSFXSR=0

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      4bd638ac
    • Stefan Hajnoczi's avatar
      Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging · 42f3253c
      Stefan Hajnoczi authored 
      
virtio: regression fix

Fixes regression with migration and vsock, as fixing that
exposes some known issues in vhost user cleanup, this attempts
to fix those as well. More work on vhost user is needed :)

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>

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# gpg: Signature made Thu 01 Dec 2022 02:37:05 EST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu

:
  include/hw: VM state takes precedence in virtio_device_should_start
  hw/virtio: generalise CHR_EVENT_CLOSED handling
  hw/virtio: add started_vu status field to vhost-user-gpio
  vhost: enable vrings in vhost_dev_start() for vhost-user devices
  tests/qtests: override "force-legacy" for gpio virtio-mmio tests

Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
      42f3253c
  11. Dec 03, 2022
  13. Dec 02, 2022
  15. Dec 01, 2022
  17. Nov 29, 2022