The edk2-stabe201903 release introduced Python3 support to edk2's
BaseTools; however the Python3 enablement breaks in a corner case (which
is nevertheless supported by the edk2 community), namely the in-module
parallelization that we utilize.
This is tracked under
<https://bugzilla.tianocore.org/show_bug.cgi?id=1607>. For now, work
around the issue (in advance) by forcing Python2. (The workaround is a
no-op before we move to edk2-stabe201903 in the roms/edk2 submodule.)
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Extract the dense logic for architecture and toolchain massaging from
"tests/uefi-test-tools/build.sh", to a set of small functions. We'll reuse
these functions for building full platform firmware images.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Filter the qemu-nbd server output to get rid of a direct reference
to my build directory.
Fixes: e9dce9cb
Reported-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
tmpfs does not support O_DIRECT. Detect this case, and skip flipping
@direct if the filesystem does not support it.
Fixes: bf3e50f623
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
drive_new() returns null without setting an error when it provided
help. add_init_drive() assumes null means failure, and crashes trying
to report a null error.
Fixes: c4f26c9f37
Cc: qemu-stable@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The test uses the trick:
if (!opts) {
opts = &(QOSGraph...Options) { };
}
in a couple of places, however the temporary created
by the &() {} goes out of scope at the bottom of the if,
and results in a seg or assert when opts-> fields are
used (on fedora 30's gcc 9).
Fixes: fc281c8020
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190405184037.16799-1-dgilbert@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Clean up wrong usage of FALSE and TRUE in places that use "bool" from stdbool.h.
FALSE and TRUE (with capital letters) are the constants defined by glib for
being used with the "gboolean" type of glib. But some parts of the code also use
TRUE and FALSE for variables that are declared as "bool" (the type from <stdbool.h>).
Signed-off-by: Jafar Abdi <cafer.abdi@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <1553351197-14581-4-git-send-email-cafer.abdi@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Clean up wrong usage of FALSE and TRUE in places that use "bool" from stdbool.h.
FALSE and TRUE (with capital letters) are the constants defined by glib for
being used with the "gboolean" type of glib. But some parts of the code also use
TRUE and FALSE for variables that are declared as "bool" (the type from <stdbool.h>).
Signed-off-by: Jafar Abdi <cafer.abdi@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1553351197-14581-3-git-send-email-cafer.abdi@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Ensure watch IDs unique within a monitor and avoid integer wraparound
issues when many watches are set & unset over time.
-----BEGIN PGP SIGNATURE-----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=qriK
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/berrange/tags/filemon-next-pull-request' into staging
filemon: various fixes / improvements to file monitor for USB MTP
Ensure watch IDs unique within a monitor and avoid integer wraparound
issues when many watches are set & unset over time.
# gpg: Signature made Tue 02 Apr 2019 13:53:40 BST
# gpg: using RSA key BE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg: aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF
* remotes/berrange/tags/filemon-next-pull-request:
filemon: fix watch IDs to avoid potential wraparound issues
filemon: ensure watch IDs are unique to QFileMonitor scope
tests: refactor file monitor test to make it more understandable
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
iotest 235 currently only works with KVM - this is bad for systems where
it is not available, e.g. CI pipelines. The test also works when using
"tcg" as accelerator, so we can simply add that to the list of accelerators,
too.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The base node of a block-stream operation indicates the first image
from the backing chain starting from which no data is copied to the
top node.
The block-stream job allows others to use that base image, so a second
block-stream job could be writing to it at the same time. An important
restriction is that the base image must not disappear while the stream
job is ongoing. stream_start() freezes the backing chain from top to
base with that purpose but it does it too late in the code so there is
a race condition there.
This bug was fixed in the previous commit, and this patch contains an
iotest for this scenario.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The file tests/qemu-iotests/COPYING is the same text as in the
COPYING file in the main directory. So as far as I can see, we don't
need the duplicate here.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
virtio-pci is optional on s390x, e.g. in downstream RHEL builds, it
is disabled. On s390x, virtio-ccw should be used instead. Other tests
like 051 or 240 already use virtio-scsi-ccw instead of virtio-scsi-pci
on s390x, so let's do the same here and always use virtio-scsi-ccw on
s390x.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Both NBD_CMD_BLOCK_STATUS and structured NBD_CMD_READ will split their
reply according to bdrv_block_status() boundaries. If the block device
has a request_alignment smaller than 512, but we advertise a block
alignment of 512 to the client, then this can result in the server
reply violating client expectations by reporting a smaller region of
the export than what the client is permitted to address (although this
is less of an issue for qemu 4.0 clients, given recent client patches
to overlook our non-compliance at EOF). Since it's always better to
be strict in what we send, it is worth advertising the actual minimum
block limit rather than blindly rounding it up to 512.
Note that this patch is not foolproof - it is still possible to
provoke non-compliant server behavior using:
$ qemu-nbd --image-opts driver=blkdebug,align=512,image.driver=file,image.filename=/path/to/non-aligned-file
That is arguably a bug in the blkdebug driver (it should never pass
back block status smaller than its alignment, even if it has to make
multiple bdrv_get_status calls and determine the
least-common-denominator status among the group to return). It may
also be possible to observe issues with a backing layer with smaller
alignment than the active layer, although so far I have been unable to
write a reliable iotest for that scenario (but again, an issue like
that could be argued to be a bug in the block layer, or something
where we need a flag to bdrv_block_status() to state whether the
result must be aligned to the current layer's limits or can be
subdivided for accuracy when chasing backing files).
Anyways, as blkdebug is not normally used, and as this patch makes our
server more interoperable with qemu 3.1 clients, it is worth applying
now, even while we still work on a larger patch series for the 4.1
timeframe to have byte-accurate file lengths.
Note that the iotests output changes - for 223 and 233, we can see the
server's better granularity advertisement; and for 241, the three test
cases have the following effects:
- natural alignment: the server's smaller alignment is now advertised,
and the hole reported at EOF is now the right result; we've gotten rid
of the server's non-compliance
- forced server alignment: the server still advertises 512 bytes, but
still sends a mid-sector hole. This is still a server compliance bug,
which needs to be fixed in the block layer in a later patch; output
does not change because the client is already being tolerant of the
non-compliance
- forced client alignment: the server's smaller alignment means that
the client now sees the server's status change mid-sector without any
protocol violations, but the fact that the map shows an unaligned
mid-sector hole is evidence of the block layer problems with aligned
block status, to be fixed in a later patch
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190329042750.14704-7-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: rebase to enhanced iotest 241 coverage]
It is desirable for 'qemu-img map' to have the same output for a file
whether it is served over file or nbd protocols. However, ever since
we implemented block status for NBD (2.12), the NBD protocol forgot to
inform the block layer that as the final layer in the chain, the
offset is valid; without an offset, the human-readable form of
qemu-img map gives up with the unhelpful:
$ nbdkit -U - data data="1" size=512 --run 'qemu-img map $nbd'
Offset Length Mapped to File
qemu-img: File contains external, encrypted or compressed clusters.
The --output=json form always works, because it is reporting the
lower-level bdrv_block_status results directly rather than trying to
filter out sparse ranges for human consumption - but now it also
shows the offset member.
With this patch, the human output changes to:
Offset Length Mapped to File
0 0x200 0 nbd+unix://?socket=/tmp/nbdkitOxeoLa/socket
This change is observable to several iotests.
Fixes: 78a33ab5
Reported-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190329042750.14704-4-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Add a test for the NBD client workaround in the previous patch. It's
not really feasible for an iotest to assume a specific tracing engine,
so we can't really probe trace_nbd_parse_blockstatus_compliance to see
if the server was fixed vs. whether the client just worked around the
server (other than by rearranging order between code patches and this
test). But having a successful exchange sure beats the previous state
of an error message. Since format probing can change alignment, we can
use that as an easy way to test several configurations.
Not tested yet, but worth adding to this test in future patches: an
NBD server that can advertise a non-sector-aligned size (such as
nbdkit) causes qemu as the NBD client to misbehave when it rounds the
size up and accesses beyond the advertised size. Qemu as NBD server
never advertises a non-sector-aligned size (since bdrv_getlength()
currently rounds up to sector boundaries); until qemu can act as such
a server, testing that flaw will have to rely on external binaries.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190329042750.14704-2-eblake@redhat.com>
Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: add forced-512 alignment, and nbdkit reproducer comment]
Test that mirror job actually resume on resume command after being
automatically paused on ENOSPC error.
It's a follow-up test for 8d9648cbf3
"blockjob: fix user pause in block_job_error_action"
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Tested-by: John Snow <jsnow@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Drop test_fail: we know that exit simcall works. Now that it's not run
automatically there's no point in keeping it.
Drop test_pipeline: we're not modeling pipeline, we don't control ccount
and there's no plan to do so.
Enable test_boolean: it won't break on cores without boolean option, it
will do testing on cores with boolean option.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
break_dependency incorrectly handles the case of dependency on an opcode
that references the same register multiple times. E.g. the following
instruction is translated incorrectly:
{ or a2, a3, a3 ; or a3, a2, a2 }
This happens because resource indices of both dependency graph nodes are
incremented, and a copy for the second instance of the same register in
the ending node is not done.
Only increment resource index of the ending node of the dependency.
Add test.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Currently, the Cascadelake-Server, Icelake-Client, and
Icelake-Server are always generating the following warning:
qemu-system-x86_64: warning: \
host doesn't support requested feature: CPUID.07H:ECX [bit 4]
This happens because OSPKE was never returned by
GET_SUPPORTED_CPUID or x86_cpu_get_supported_feature_word().
OSPKE is a runtime flag automatically set by the KVM module or by
TCG code, was always cleared by x86_cpu_filter_features(), and
was not supposed to appear on the CPU model table.
Remove the OSPKE flag from the CPU model table entries, to avoid
the bogus warning and avoid returning invalid feature data on
query-cpu-* QMP commands. As OSPKE was always cleared by
x86_cpu_filter_features(), this won't have any guest-visible
impact.
Include a test case that should detect the problem if we introduce
a similar bug again.
Fixes: c7a88b52f6 ("i386: Add new model of Cascadelake-Server")
Fixes: 8a11c62da9 ("i386: Add new CPU model Icelake-{Server,Client}")
Cc: Tao Xu <tao3.xu@intel.com>
Cc: Robert Hoo <robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190319200515.14999-1-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This removes the duplicated initialization code.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
232 is marked as generic, but commit 12efe428c9 added code that assumes
qcow2. What the new test really needs is backing files and support for
updating the backing file link (.bdrv_change_backing_file).
Split the non-generic code into a new test case 247 and make it work
with qed, too.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
There are various actions in this test that must be executed
sequentially, as the result of it depends on the state triggered by the
previous one.
If the last argument of _send_qemu_cmd() is an empty string, it just
sends the QMP commands without waiting for an answer. While unlikely, it
may happen that the next action in the test gets invoked before QEMU
processes the QMP request.
This issue seems to be easier to reproduce on servers with limited
resources or highly loaded.
With this change, we wait for an answer on all _send_qemu_cmd() calls.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Commit 5d75648b56 generates 'tests/test-qapi-emit-events.[ch]' but
did not ignore them for in-tree builds.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190314104622.101715-3-sgarzare@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
- file-posix: Make auto-read-only dynamic
- Add x-blockdev-reopen QMP command
- Finalize block-latency-histogram QMP command
- gluster: Build fixes for newer lib version
-----BEGIN PGP SIGNATURE-----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=dQt+
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Block layer patches:
- file-posix: Make auto-read-only dynamic
- Add x-blockdev-reopen QMP command
- Finalize block-latency-histogram QMP command
- gluster: Build fixes for newer lib version
# gpg: Signature made Tue 12 Mar 2019 19:30:31 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: (28 commits)
qemu-iotests: Test the x-blockdev-reopen QMP command
block: Add an 'x-blockdev-reopen' QMP command
block: Remove the AioContext parameter from bdrv_reopen_multiple()
block: Add bdrv_reset_options_allowed()
block: Add a 'mutable_opts' field to BlockDriver
block: Allow changing the backing file on reopen
block: Allow omitting the 'backing' option in certain cases
block: Handle child references in bdrv_reopen_queue()
block: Add 'keep_old_opts' parameter to bdrv_reopen_queue()
block: Freeze the backing chain for the duration of the stream job
block: Freeze the backing chain for the duration of the mirror job
block: Freeze the backing chain for the duration of the commit job
block: Allow freezing BdrvChild links
nvme: fix write zeroes offset and count
file-posix: Make auto-read-only dynamic
file-posix: Prepare permission code for fd switching
file-posix: Lock new fd in raw_reopen_prepare()
file-posix: Store BDRVRawState.reopen_state during reopen
file-posix: Factor out raw_reconfigure_getfd()
file-posix: Fix bdrv_open_flags() for snapshot=on
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add support for pattern groups.
Other misc cleanups for multiple decode functions.
-----BEGIN PGP SIGNATURE-----
iQEcBAABAgAGBQJch+V5AAoJEGTfOOivfiFfsFsH/1KW6UWAiieZ1+HPYEp24Ku8
hCNxlfj0iKe1ZEuC8qp2U27GzePi71IlIJ7p5AuAhiTQBBWz8bPzJJUALm3EliaI
V4/13fLnTYALnPWoUJclU5frdHBhpIWxFUtnLdB50dSU1cTbFFyS+63JsW3wSSXt
UqntlhSsAmAQr3ULnKufwDZQJgQoft/8G4YzvMOm/7E0ZeV3B9mARAkn6m/30gLx
nXgLI2OQrA1ATLeTfzNRup9G+YjLx0nW2LRhAseIWcQAW8PyfJsfW6tJeou93+bf
fK6BkLMgor74QH37Y3u7KVJGJ04u2Gtu0p2JzBA9MU/0l07WihWPA0eJGnP396I=
=BxBC
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/rth/tags/pull-dt-20190312' into staging
Break out documentation to docs/devel/.
Add support for pattern groups.
Other misc cleanups for multiple decode functions.
# gpg: Signature made Tue 12 Mar 2019 16:59:37 GMT
# gpg: using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F
* remotes/rth/tags/pull-dt-20190312:
decodetree: Properly diagnose fields overflowing an insn
decodetree: Prefix extract function names with decode_function
decodetree: Allow +- to begin a number initializing a field
decodetree: Produce clean output for an empty input file
decodetree: Add --static-decode option
test/decode: Add tests for PatternGroups
decodetree: Allow grouping of overlapping patterns
decodetree: Do not unconditionaly return from Pattern.output_code
decodetree: Ensure build_tree does not include values outside insnmask
decodetree: Document the usefulness of argument sets
decodetree: Move documentation to docs/devel/decodetree.rst
MAINTAINERS: Add scripts/decodetree.py to the TCG section
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This patch adds several tests for the x-blockdev-reopen QMP command.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Until now, with auto-read-only=on we tried to open the file read-write
first and if that failed, read-only was tried. This is actually not good
enough for libvirt, which gives QEMU SELinux permissions for read-write
only as soon as it actually intends to write to the image. So we need to
be able to switch between read-only and read-write at runtime.
This patch makes auto-read-only dynamic, i.e. the file is opened
read-only as long as no user of the node has requested write
permissions, but it is automatically reopened read-write as soon as the
first writer is attached. Conversely, if the last writer goes away, the
file is reopened read-only again.
bs->read_only is no longer set for auto-read-only=on files even if the
file descriptor is opened read-only because it will be transparently
upgraded as soon as a writer is attached. This changes the output of
qemu-iotests 232.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Using a different read-only setting for bs->open_flags than for the
flags to the driver's open function is just inconsistent and a bad idea.
After this patch, the temporary snapshot keeps being opened read-only if
read-only=on,snapshot=on is passed.
If we wanted to change this behaviour to make only the orginal image
file read-only, but the temporary overlay read-write (as the comment in
the removed code suggests), that change would have to be made in
bdrv_temp_snapshot_options() (where the comment suggests otherwise).
Addressing this inconsistency before introducing dynamic auto-read-only
is important because otherwise we would immediately try to reopen the
temporary overlay even though the file is already unlinked.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
tests/virtio-blk-test uses a temporary image file that it deletes while
QEMU is still running, so it can't be reopened when writers are
attached or detached. Disable auto-read-only to keep it always writable.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Test that we can actually resize qcow2 images with persistent bitmaps
correctly. Throw some other goofy stuff at the test while we're at it,
like adding bitmaps of different granularities and at different times.
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Tested-by: Eric Blake <eblake@redhat.com>
Message-id: 20190311185147.52309-5-vsementsov@virtuozzo.com
[vsmentsov: drop \n from the end of test output,
test output changed a bit: some bitmaps goes in other order
int the output]
Signed-off-by: John Snow <jsnow@redhat.com>
