Extend the hash benchmark so that it can validate all algorithms
supported by QEMU instead of being limited to sha256.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently if you attampt to create too large file with luks you
get the following error message:
Formatting 'test.luks', fmt=luks size=17592186044416 key-secret=sec0
qemu-img: test.luks: Could not resize file: File too large
While for raw format the error message is
qemu-img: test.img: The image size is too large for file format 'raw'
The reason for this is that qemu-img checks for errono of the failure,
and presents the later error when it is -EFBIG
However crypto generic code 'swallows' the errno and replaces it
with -EIO.
As an attempt to make it better, we can make luks driver,
detect -EFBIG and in this case present a better error message,
which is what this patch does
The new error message is:
qemu-img: error creating test.luks: The requested file size is too large
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1534898
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
We can delete the redundant type conversion if
we set the the AES_KEY parameter with 'const' in
qcrypto_cipher_aes_ecb_(en|de)crypt() function.
Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Change condition from QCRYPTO_SECRET_FORMAT_RAW
to QCRYPTO_SECRET_FORMAT_BASE64 in if-operator, because
this is potential error if you add another format value.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alexey Krasikov <alex-krasikov@yandex-team.ru>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This fixes the condition-check done by the "loaded" property
getter, such that the property returns true even when the
secret is loaded by the 'file' option.
Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2020-05-06-1' into staging
Merge tpm 2020/05/06 v1
# gpg: Signature made Wed 06 May 2020 15:16:17 BST
# gpg: using RSA key B818B9CADF9089C2D5CEC66B75AD65802A0B4211
# gpg: Good signature from "Stefan Berger <stefanb@linux.vnet.ibm.com>" [unknown]
# 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: B818 B9CA DF90 89C2 D5CE C66B 75AD 6580 2A0B 4211
* remotes/stefanberger/tags/pull-tpm-2020-05-06-1:
hw: add compat machines for 5.1
hw/arm/virt: Remove the compat forcing tpm-tis-device PPI to off
tpm: tpm-tis-device: set PPI to false by default
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
For the benefit of compatibility of function pointer types,
we have standardized on int32_t and int64_t as the integral
argument to tcg expanders.
We converted most of them in 474b2e8f0f, but missed the rotates.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We have this same parameter for GVecGen2i, GVecGen3,
and GVecGen3i. This will make some SVE2 insns easier
to parameterize.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Better handling of non-power-of-2 tails as seen with Arm 8-byte
vector operations.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
For use when a target needs to pass a configure-specific
target_ulong value to duplicate.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These interfaces are now unused.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Replace the outgoing interface.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
In a few cases, we're able to remove some manual replication.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We can now unify the implementation of the 3 VSPLTI instructions.
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The gen_gvec_dupi switch is unnecessary with the new function.
Replace it with a local gen_gvec_dup_imm that takes care of the
register to offset conversion and length arguments.
Drop zero_vec and use use gen_gvec_dup_imm with 0.
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add a version of tcg_gen_dup_* that takes both immediate and
a vector element size operand. This will replace the set of
tcg_gen_gvec_dup{8,16,32,64}i functions that encode the element
size within the function name.
Reviewed-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This is a single patch to add support to the RegisterAPI for different
data sizes.
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Merge remote-tracking branch 'remotes/alistair/tags/pull-reg-to-apply-20200505' into staging
Pull request for RegisterAPI
This is a single patch to add support to the RegisterAPI for different
data sizes.
# gpg: Signature made Wed 06 May 2020 00:08:15 BST
# gpg: using RSA key F6C4AC46D4934868D3B8CE8F21E10D29DF977054
# gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [full]
# Primary key fingerprint: F6C4 AC46 D493 4868 D3B8 CE8F 21E1 0D29 DF97 7054
* remotes/alistair/tags/pull-reg-to-apply-20200505:
hw/core/register: Add register_init_block8 helper.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now that the tpm-tis-device device PPI property is off by default,
we can remove the compat used for the same goal.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Message-id: 20200427143145.16251-3-eric.auger@redhat.com
The tpm-tis-device device does not support PPI. Let's
change the default value for the corresponding property
instead of tricking this latter in the mach-virt machine.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Message-id: 20200427143145.16251-2-eric.auger@redhat.com
- travis: drop macosx, tweak ppc64 native
- cirrus: fix FreeBSD, guard against future breakage
- gdbstub: support socket debug for linux-user
- gdbstub: add multiarch tests
- gdbstub: fixes for m68k
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-and-gdbstub-060520-1' into staging
Testing and gdbstub updates:
- travis: drop macosx, tweak ppc64 native
- cirrus: fix FreeBSD, guard against future breakage
- gdbstub: support socket debug for linux-user
- gdbstub: add multiarch tests
- gdbstub: fixes for m68k
# gpg: Signature made Wed 06 May 2020 09:33:17 BST
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-testing-and-gdbstub-060520-1:
target/m68k: fix gdb for m68xxx
tests/tcg: add a multiarch linux-user gdb test
tests/guest-debug: use the unix socket for linux-user tests
gdbstub/linux-user: support debugging over a unix socket
gdbstub: eliminate gdbserver_fd global
tests/tcg: drop inferior.was_attached() test
tests/tcg: better trap gdb failures
gdbstub: Introduce gdb_get_float64() to get 64-bit float registers
configure: favour gdb-multiarch if we have it
.travis.yml: reduce the load on [ppc64] GCC check-tcg
.cirrus.yml: bootstrap pkg unconditionally
.cirrus.yml: bump FreeBSD to the current stable release
.travis.yml: drop MacOSX
.travis.yml: show free disk space at end of run
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Currently "cf-core.xml" is sent to GDB when using any m68k flavor. Thing is
it uses the "org.gnu.gdb.coldfire.core" feature name and gdb 8.3 then expects
a coldfire FPU instead of the default m68881 FPU.
This is not OK because the m68881 floats registers are 96 bits wide so it
crashes GDB with the following error message:
(gdb) target remote localhost:7960
Remote debugging using localhost:7960
warning: Register "fp0" has an unsupported size (96 bits)
warning: Register "fp1" has an unsupported size (96 bits)
...
Remote 'g' packet reply is too long (expected 148 bytes, got 180 bytes): \
00000000000[...]0000
With this patch: qemu-system-m68k -M none -cpu m68020 -s -S
(gdb) tar rem :1234
Remote debugging using :1234
warning: No executable has been specified and target does not support
determining executable automatically. Try using the "file" command.
0x00000000 in ?? ()
(gdb) p $fp0
$1 = nan(0xffffffffffffffff)
Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1588094279-17913-3-git-send-email-frederic.konrad@adacore.com>
Message-Id: <20200430190122.4592-10-alex.bennee@linaro.org>
When the gdbstub code was converted to the new API we missed a few
snafus in the various guests. Add a simple gdb test script which can
be used on all our linux-user guests to check for obvious failures.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200430190122.4592-9-alex.bennee@linaro.org>
Now we have support for debugging over a unix socket for linux-user
lets use it in our test harness.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200430190122.4592-8-alex.bennee@linaro.org>
While debugging over TCP is fairly straightforward now we have test
cases that want to orchestrate via make and currently a parallel build
fails as two processes can't use the same listening port. While system
emulation offers a wide cornucopia of connection methods thanks to the
chardev abstraction we are a little more limited for linux user.
Thankfully the programming API for a TCP socket and a local UNIX
socket is pretty much the same once it's set up.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200430190122.4592-7-alex.bennee@linaro.org>
We don't really need to track this fd beyond the initial creation of
the socket. We already know if the system has been initialised by
virtue of the gdbserver_state so lets remove it. This makes the later
re-factoring easier.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200430190122.4592-6-alex.bennee@linaro.org>
This test seems flaky and reports attachment even when we failed to
negotiate the architecture. However the fetching of the guest
architecture will fail tripping up the gdb AttributeError which will
trigger our early no error status exit from the test
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200430190122.4592-5-alex.bennee@linaro.org>
It seems older and non-multiarach aware GDBs might not fail gracefully
when faced with something they don't know. For example when faced with
a target XML for s390x the Ubuntu 18.04 gdb will generate an internal
fault and prompt for a core dump.
Work around this by invoking GDB in a more batch orientated way and
then trying to filter out between test failures and gdb failures.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200430190122.4592-4-alex.bennee@linaro.org>
When converted to use GByteArray in commits 462474d760 and
a010bdbe71, the call to stfq_p() was removed. This call
serialize a float.
Since we now use a GByteArray, we can not use stfq_p() directly.
Introduce the gdb_get_float64() helper to load a float64 register.
Fixes: 462474d760 ("target/m68k: use gdb_get_reg helpers")
Fixes: a010bdbe71 ("extend GByteArray to read register helpers")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200414163853.12164-3-philmd@redhat.com>
Message-Id: <20200430190122.4592-3-alex.bennee@linaro.org>
As gdb will generally be talking to "foreign" guests lets use that if
we can. Otherwise the chances of gdb barfing are considerably higher.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200430190122.4592-2-alex.bennee@linaro.org>
This seems to be timing out quite often and occasionally running out
of disk space. Relegate it to light duties.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200501111505.4225-5-alex.bennee@linaro.org>
Hopefully this will un-stick the test which has been broken for a long
time.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Li-Wen Hsu <lwhsu@freebsd.org>
Tested-by: Li-Wen Hsu <lwhsu@freebsd.org>
Message-Id: <20200501111505.4225-4-alex.bennee@linaro.org>
This keeps breaking on Travis so lets just fall back to the Cirrus CI
builds which seem to be better maintained. Fix up the comments while
we are doing this as we never had a windows build.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200501111505.4225-3-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200501111505.4225-2-alex.bennee@linaro.org>
There was no support for 8 bits block registers. Changed
register_init_block32 to be generic and static, adding register
size in bits as parameter. Created one helper for each size.
Signed-off-by: Joaquin de Andres <me@xcancerberox.com.ar>
Message-Id: <20200402162839.76636-1-me@xcancerberox.com.ar>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
- reduce client-side fragmentation of NBD trim and status requests
- fix iotest 41 when run in deep tree
- fix socket activation in qemu-nbd
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Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2020-05-04' into staging
nbd patches for 2020-05-04
- reduce client-side fragmentation of NBD trim and status requests
- fix iotest 41 when run in deep tree
- fix socket activation in qemu-nbd
# gpg: Signature made Mon 04 May 2020 22:12:21 BST
# 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-2020-05-04:
block/nbd-client: drop max_block restriction from discard
block/nbd-client: drop max_block restriction from block_status
iotests/041: Fix NBD socket path
tools: Fix use of fcntl(F_SETFD) during socket activation
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Silent static analyzer warning
Remove dead assignments
Support -chardev serial on macOS
Update MAINTAINERS
Some cosmetic changes
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Merge remote-tracking branch 'remotes/vivier2/tags/trivial-branch-for-5.1-pull-request' into staging
trivial patches (20200504)
Silent static analyzer warning
Remove dead assignments
Support -chardev serial on macOS
Update MAINTAINERS
Some cosmetic changes
# gpg: Signature made Mon 04 May 2020 16:45:18 BST
# gpg: using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg: issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg: aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C
* remotes/vivier2/tags/trivial-branch-for-5.1-pull-request:
hw/timer/pxa2xx_timer: Add assertion to silent static analyzer warning
hw/timer/stm32f2xx_timer: Remove dead assignment
hw/gpio/aspeed_gpio: Remove dead assignment
hw/isa/i82378: Remove dead assignment
hw/ide/sii3112: Remove dead assignment
hw/input/adb-kbd: Remove dead assignment
hw/i2c/pm_smbus: Remove dead assignment
blockdev: Remove dead assignment
block: Avoid dead assignment
Compress lines for immediate return
chardev: Add macOS to list of OSes that support -chardev serial
MAINTAINERS: Update Keith Busch's email address
elf_ops: Don't try to g_mapped_file_unref(NULL)
hw/mem/pc-dimm: Fix line over 80 characters warning
hw/mem/pc-dimm: Print slot number on error at pc_dimm_pre_plug()
MAINTAINERS: Mark the LatticeMico32 target as orphan
timer/exynos4210_mct: Remove redundant statement in exynos4210_mct_write()
display/blizzard: use extract16() for fix clang analyzer warning in blizzard_draw_line16_32()
scsi/esp-pci: add g_assert() for fix clang analyzer warning in esp_pci_io_write()
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Run block_copy iterations in parallel in aio tasks.
Changes:
- BlockCopyTask becomes aio task structure. Add zeroes field to pass
it to block_copy_do_copy
- add call state - it's a state of one call of block_copy(), shared
between parallel tasks. For now used only to keep information about
first error: is it read or not.
- convert block_copy_dirty_clusters to aio-task loop.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200429130847.28124-6-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Instead of just relying on the comment "Called only on full-dirty
region" in block_copy_task_create() let's move initial dirty area
search directly to block_copy_task_create(). Let's also use effective
bdrv_dirty_bitmap_next_dirty_area instead of looping through all
non-dirty clusters.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429130847.28124-5-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
We are going to use aio-task-pool API, so we'll need state pointer in
BlockCopyTask anyway. Add it now and use where possible.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429130847.28124-4-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
We are going to use aio-task-pool API, so tasks will be handled in
parallel. We need therefore separate allocated task on each iteration.
Introduce this logic now.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429130847.28124-3-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
We are going to use aio-task-pool API and extend in-flight request
structure to be a successor of AioTask, so rename things appropriately.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429130847.28124-2-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Commit f62514b3de made qemu-img reject -o "" but this test uses it.
Since this test only tries to do a dry-run run of qemu-img amend,
replace the -o "" with dummy -o "size=$size".
Fixes: f62514b3de
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200504131959.9533-1-mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
It's been a while since we got rid of the sector-based bdrv_read and
bdrv_write (commit 2e11d756); let's finish the job on a few remaining
comments.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428213807.776655-1-eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Our comment did not actually match the code. Rewrite the comment to
be less sensitive to any future changes to qcow2-bitmap.c that might
implement scenarios that we currently reject.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200428192648.749066-4-eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
We originally refused to allow resize of images with internal
snapshots because the v2 image format did not require the tracking of
snapshot size, making it impossible to safely revert to a snapshot
with a different size than the current view of the image. But the
snapshot size tracking was rectified in v3, and our recent fixes to
qemu-img amend (see 0a85af35) guarantee that we always have a valid
snapshot size. Thus, we no longer need to artificially limit image
resizes, but it does become one more thing that would prevent a
downgrade back to v2. And now that we support different-sized
snapshots, it's also easy to fix reverting to a snapshot to apply the
new size.
Upgrade iotest 61 to cover this (we previously had NO coverage of
refusal to resize while snapshots exist). Note that the amend process
can fail but still have effects: in particular, since we break things
into upgrade, resize, downgrade, a failure during resize does not roll
back changes made during upgrade, nor does failure in downgrade roll
back a resize. But this situation is pre-existing even without this
patch; and without journaling, the best we could do is minimize the
chance of partial failure by collecting all changes prior to doing any
writes - which adds a lot of complexity but could still fail with EIO.
On the other hand, we are careful that even if we have partial
modification but then fail, the image is left viable (that is, we are
careful to sequence things so that after each successful cluster
write, there may be transient leaked clusters but no corrupt
metadata). And complicating the code to make it more transaction-like
is not worth the effort: a user can always request multiple 'qemu-img
amend' changing one thing each, if they need finer-grained control
over detecting the first failure than what they get by letting qemu
decide how to sequence multiple changes.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200428192648.749066-3-eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
There are several callers that need to create a new block backend from
an existing BDS; make the task slightly easier with a common helper
routine.
Suggested-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200424190903.522087-2-eblake@redhat.com>
[mreitz: Set @ret only in error paths, see
https://lists.nongnu.org/archive/html/qemu-block/2020-04/msg01216.html]
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200428192648.749066-2-eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
