- minor refactoring of constants
- drop LIT64 macro
- re-organise header inclusion
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-softfloat-headers-190819-1' into staging
Softfloat updates
- minor refactoring of constants
- drop LIT64 macro
- re-organise header inclusion
# gpg: Signature made Mon 19 Aug 2019 12:08:37 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-softfloat-headers-190819-1:
targets (various): use softfloat-helpers.h where we can
target/riscv: rationalise softfloat includes
target/mips: rationalise softfloat includes
fpu: rename softfloat-specialize.h -> .inc.c
fpu: make softfloat-macros "self-contained"
fpu: move inline helpers into a separate header
fpu: remove the LIT64 macro
target/m68k: replace LIT64 with UINT64_C macros
fpu: replace LIT64 with UINT64_C macros
fpu: use min/max values from stdint.h for integral overflow
fpu: convert float[16/32/64]_squash_denormal to new modern style
fpu: replace LIT64 usage with UINT64_C for specialize constants
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Stable notes: patches one and two can be considered
for the next -stable release.
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Merge remote-tracking branch 'remotes/jnsnow/tags/ide-pull-request' into staging
Pull request
Stable notes: patches one and two can be considered
for the next -stable release.
# gpg: Signature made Sat 17 Aug 2019 00:15:50 BST
# gpg: using RSA key F9B7ABDBBCACDF95BE76CBD07DEF8106AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>" [full]
# Primary key fingerprint: FAEB 9711 A12C F475 812F 18F2 88A9 064D 1835 61EB
# Subkey fingerprint: F9B7 ABDB BCAC DF95 BE76 CBD0 7DEF 8106 AAFC 390E
* remotes/jnsnow/tags/ide-pull-request:
hw/ide/atapi: Use the ldst API
Revert "ide/ahci: Check for -ECANCELED in aio callbacks"
dma-helpers: ensure AIO callback is invoked after cancellation
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Generally the cpu and non-FP helper files just want to manipulate the
softfloat flags. For this they can just use the -helpers.h include
which brings in a minimal number of inline helpers.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
We should avoid including the whole of softfloat headers in cpu.h and
explicitly include it only where we will be calling softfloat
functions. We can use the -types.h and -helpers.h in cpu.h for the few
bits that are global.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Palmer Dabbelt <palmer@sifive.com>
We should avoid including the whole of softfloat headers in cpu.h and
explicitly include it only where we will be calling softfloat
functions. We can use the -types.h in cpu.h for the few bits that are
global. We also move the restore_snan_bit_mode into internal.h and
include -helpers.h there.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
This is not a normal header and should only be included in the main
softfloat.c file to bring in the various target specific
specialisations. Indeed as it contains non-inlined C functions it is
not even a legal header. Rename it to match our included C convention.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
The macros use the "flags" type and to be consistent if anyone just
needs the macros we should bring in the header we need. There is an
outstanding TODO to audit the use of "flags" and replace with bool at
which point this include could be dropped.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
There are a bunch of users of the inline helpers who do not need
access to the entire softfloat API. Move those inline helpers into a
new header file which can be included without bringing in the rest of
the world.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Now the rest of the code has been cleaned up we can remove this.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
In our quest to eliminate the home rolled LIT64 macro we fixup usage
inside for m68k's many constants.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
In our quest to eliminate the home rolled LIT64 macro we fixup usage
inside the softfloat code. While we are at it we remove some of the
extraneous spaces to closer fit the house style.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Remove some more use of LIT64 while making the meaning more clear. We
also avoid the need of casts as the results by definition fit into the
return type.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This also allows us to remove the extractFloat16exp/frac helpers. We
avoid using the floatXX_pack_raw functions as they are slight overkill
for masking out all but the top bit of the number. The generated code
is almost exactly the same as makes no difference to the
pre-conversion code.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
We have a wrapper that does the right thing from stdint.h so lets use
it for our constants in softfloat-specialize.h
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Rebase notes:
011/36:[0003] [FC] 'block/backup: upgrade copy_bitmap to BdrvDirtyBitmap'
016/36:[----] [-C] 'iotests: Add virtio-scsi device helper'
017/36:[0002] [FC] 'iotests: add test 257 for bitmap-mode backups'
030/36:[0011] [FC] 'block/backup: teach TOP to never copy unallocated regions'
032/36:[0018] [FC] 'iotests/257: test traditional sync modes'
11: A new hbitmap call was added late in 4.1, changed to
bdrv_dirty_bitmap_next_zero.
16: Context-only (self.has_quit is new context in 040)
17: Removed 'auto' to follow upstream trends in iotest fashion
30: Handled explicitly on-list with R-B from Max.
32: Fix capitalization in test, as mentioned on-list.
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Merge remote-tracking branch 'remotes/jnsnow/tags/bitmaps-pull-request' into staging
Pull request
Rebase notes:
011/36:[0003] [FC] 'block/backup: upgrade copy_bitmap to BdrvDirtyBitmap'
016/36:[----] [-C] 'iotests: Add virtio-scsi device helper'
017/36:[0002] [FC] 'iotests: add test 257 for bitmap-mode backups'
030/36:[0011] [FC] 'block/backup: teach TOP to never copy unallocated regions'
032/36:[0018] [FC] 'iotests/257: test traditional sync modes'
11: A new hbitmap call was added late in 4.1, changed to
bdrv_dirty_bitmap_next_zero.
16: Context-only (self.has_quit is new context in 040)
17: Removed 'auto' to follow upstream trends in iotest fashion
30: Handled explicitly on-list with R-B from Max.
32: Fix capitalization in test, as mentioned on-list.
# gpg: Signature made Sat 17 Aug 2019 00:12:13 BST
# gpg: using RSA key F9B7ABDBBCACDF95BE76CBD07DEF8106AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>" [full]
# Primary key fingerprint: FAEB 9711 A12C F475 812F 18F2 88A9 064D 1835 61EB
# Subkey fingerprint: F9B7 ABDB BCAC DF95 BE76 CBD0 7DEF 8106 AAFC 390E
* remotes/jnsnow/tags/bitmaps-pull-request: (36 commits)
tests/test-hbitmap: test next_zero and _next_dirty_area after truncate
block/backup: refactor write_flags
block/backup: deal with zero detection
qapi: add dirty-bitmaps to query-named-block-nodes result
iotests/257: test traditional sync modes
block/backup: support bitmap sync modes for non-bitmap backups
block/backup: teach TOP to never copy unallocated regions
block/backup: add backup_is_cluster_allocated
block/backup: centralize copy_bitmap initialization
block/backup: improve sync=bitmap work estimates
iotests/257: test API failures
block/backup: hoist bitmap check into QMP interface
iotests/257: Refactor backup helpers
iotests/257: add EmulatedBitmap class
iotests/257: add Pattern class
iotests: test bitmap moving inside 254
qapi: implement block-dirty-bitmap-remove transaction action
blockdev: reduce aio_context locked sections in bitmap add/remove
block/backup: loosen restriction on readonly bitmaps
iotests: add test 257 for bitmap-mode backups
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since most iotests are now run during "make check" already, we do not
need to test them explicitly from the gitlab-ci.yml script anymore.
And while we're at it, add some of the new non-auto tests >= 246 instead.
Message-Id: <20190717111947.30356-5-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
People often forget to run the iotests before submitting patches or pull
requests - this is likely due to the fact that we do not run the tests
during our mandatory "make check" tests yet. Now that we've got a proper
"auto" group of iotests that should be fine to run in every environment,
we can enable the iotests during "make check" again by running the "auto"
tests by default from the check-block.sh script.
Some cases still need to be checked first, though: iotests need bash and
GNU sed (otherwise they fail), and if gprof is enabled, it spoils the
output of some test cases causing them to fail. So if we detect that one
of the required programs is missing or that gprof is enabled, we still
have to skip the iotests to avoid failures.
And finally, since we are using check-block.sh now again, this patch also
removes the qemu-iotests-quick.sh script since we do not need that anymore
(and having two shell wrapper scripts around the block tests seems rather
confusing than helpful).
Message-Id: <20190717111947.30356-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
[AJB: -makecheck to check-block.sh, move check-block to start and gate it]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Opening a block device on NetBSD has an additional step compared to other OSes,
corresponding to raw_normalize_devicepath. The error message in that function
is slightly different from that in raw_open_common and this was causing spurious
failures in qemu-iotests. However, in general it is not important to know what
exact step was failing, for example in the qemu-iotests case the error message
contains the fairly unequivocal "No such file or directory" text from strerror.
We can thus fix the failures by standardizing on a single error message for
both raw_open_common and raw_normalize_devicepath; in fact, we can even
use error_setg_file_open to make sure the error message is the same as in
the rest of QEMU.
Message-Id: <20190725095920.28419-1-pbonzini@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The big-endian load/store functions are already provided
by "qemu/bswap.h".
Avoid code duplication, use the generic API.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190808130454.9930-1-philmd@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This reverts commit 0d910cfeaf.
It's not correct to just ignore an error code in a callback; we need to
handle that error and possible report failure to the guest so that they
don't wait indefinitely for an operation that will now never finish.
This ought to help cases reported by Nutanix where iSCSI returns a
legitimate -ECANCELED for certain operations which should be propagated
normally.
Reported-by: Shaju Abraham <shaju.abraham@nutanix.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20190729223605.7163-1-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
dma_aio_cancel unschedules the BH if there is one, which corresponds
to the reschedule_dma case of dma_blk_cb. This can stall the DMA
permanently, because dma_complete will never get invoked and therefore
nobody will ever invoke the original AIO callback in dbs->common.cb.
Fix this by invoking the callback (which is ensured to happen after
a bdrv_aio_cancel_async, or done manually in the dbs->bh case), and
add assertions to check that the DMA state machine is indeed waiting
for dma_complete or reschedule_dma, but never both.
Reported-by: John Snow <jsnow@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20190729213416.1972-1-pbonzini@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Test that hbitmap_next_zero and hbitmap_next_dirty_area can find things
after old bitmap end.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190805164652.42409-1-vsementsov@virtuozzo.com
Tested-by: John Snow <jsnow@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
write flags are constant, let's store it in BackupBlockJob instead of
recalculating. It also makes two boolean fields to be unused, so,
drop them.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190730163251.755248-4-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
We have detect_zeroes option, so at least for blockdev-backup user
should define it if zero-detection is needed. For drive-backup leave
detection enabled by default but do it through existing option instead
of open-coding.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190730163251.755248-2-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
Let's add a possibility to query dirty-bitmaps not only on root nodes.
It is useful when dealing both with snapshots and incremental backups.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20190717173937.18747-1-jsnow@redhat.com
[Added deprecation information. --js]
Signed-off-by: John Snow <jsnow@redhat.com>
[Fixed spelling --js]
Accept bitmaps and sync policies for the other backup modes.
This allows us to do things like create a bitmap synced to a full backup
without a transaction, or start a resumable backup process.
Some combinations don't make sense, though:
- NEVER policy combined with any non-BITMAP mode doesn't do anything,
because the bitmap isn't used for input or output.
It's harmless, but is almost certainly never what the user wanted.
- sync=NONE is more questionable. It can't use on-success because this
job never completes with success anyway, and the resulting artifact
of 'always' is suspect: because we start with a full bitmap and only
copy out segments that get written to, the final output bitmap will
always be ... a fully set bitmap.
Maybe there's contexts in which bitmaps make sense for sync=none,
but not without more severe changes to the current job, and omitting
it here doesn't prevent us from adding it later.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-11-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Presently, If sync=TOP is selected, we mark the entire bitmap as dirty.
In the write notifier handler, we dutifully copy out such regions.
Fix this in three parts:
1. Mark the bitmap as being initialized before the first yield.
2. After the first yield but before the backup loop, interrogate the
allocation status asynchronously and initialize the bitmap.
3. Teach the write notifier to interrogate allocation status if it is
invoked during bitmap initialization.
As an effect of this patch, the job progress for TOP backups
now behaves like this:
- total progress starts at bdrv_length.
- As allocation status is interrogated, total progress decreases.
- As blocks are copied, current progress increases.
Taken together, the floor and ceiling move to meet each other.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20190716000117.25219-10-jsnow@redhat.com
[Remove ret = -ECANCELED change. --js]
[Squash in conflict resolution based on Max's patch --js]
Message-id: c8b0ab36-79c8-0b4b-3193-4e12ed8c848b@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Modify bdrv_is_unallocated_range to utilize the pnum return from
bdrv_is_allocated, and in the process change the semantics from
"is unallocated" to "is allocated."
Optionally returns a full number of clusters that share the same
allocation status.
This will be used to carefully toggle bits in the bitmap for sync=top
initialization in the following commits.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-9-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Just a few housekeeping changes that keeps the following commit easier
to read; perform the initial copy_bitmap initialization in one place.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-8-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
When making backups based on bitmaps, the work estimate can be more
accurate. Update iotests to reflect the new strategy.
TOP work estimates are broken, but do not get worse with this commit.
That issue is addressed in the following commits instead.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-7-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-6-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This is nicer to do in the unified QMP interface that we have now,
because it lets us use the right terminology back at the user.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-5-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This test needs support for non-bitmap backups and missing or
unspecified bitmap sync modes, so rewrite the helpers to be a little
more generic.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Represent a bitmap with an object that we can mark and clear bits in.
This makes it easier to manage partial writes when we don't write a
full group's worth of patterns before an error.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Just kidding, this is easier to manage with a full class instead of a
namedtuple.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190716000117.25219-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Test persistent bitmap copying with and without removal of original
bitmap.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190708220502.12977-4-jsnow@redhat.com
[Edited comment "bitmap1" --> "bitmap2" as per review. --js]
Signed-off-by: John Snow <jsnow@redhat.com>
It is used to do transactional movement of the bitmap (which is
possible in conjunction with merge command). Transactional bitmap
movement is needed in scenarios with external snapshot, when we don't
want to leave copy of the bitmap in the base image.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190708220502.12977-3-jsnow@redhat.com
[Edited "since" version to 4.2 --js]
Signed-off-by: John Snow <jsnow@redhat.com>
Commit 0a6c86d024 returned these locks back to add/remove
functionality, to protect from intersection of persistent bitmap
related IO with other IO. But other bitmap-related functions called
here are unrelated to the problem, and there are no needs to keep these
calls inside critical sections.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190708220502.12977-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
With the "never" sync policy, we actually can utilize readonly bitmaps
now. Loosen the check at the QMP level, and tighten it based on
provided arguments down at the job creation level instead.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-19-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-18-jsnow@redhat.com
[Removed 'auto' group, as per new testing config guidelines --js]
Signed-off-by: John Snow <jsnow@redhat.com>
Seems that it comes up enough.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-17-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Use "FilePaths" instead of "FilePath" to request multiple files be
cleaned up after we leave that object's scope.
This is not crucial; but it saves a little typing.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-16-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
run_job can cancel pending jobs to simulate failure. This lets us use
the pending callback to issue test commands while the job is open, but
then still have the job fail in the end.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-15-jsnow@redhat.com
[Maintainer edit: Merge conflict resolution in run_job]
Signed-off-by: John Snow <jsnow@redhat.com>
Because the new-style python tests don't use the iotests.main() test
launcher, we don't turn on the debugger logging for these scripts
when invoked via ./check -d.
Refactor the launcher shim into new and old style shims so that they
share environmental configuration.
Two cleanup notes: debug was not actually used as a global, and there
was no reason to create a class in an inner scope just to achieve
default variables; we can simply create an instance of the runner with
the values we want instead.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-14-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This adds an "always" policy for bitmap synchronization. Regardless of if
the job succeeds or fails, the bitmap is *always* synchronized. This means
that for backups that fail part-way through, the bitmap retains a record of
which sectors need to be copied out to accomplish a new backup using the
old, partial result.
In effect, this allows us to "resume" a failed backup; however the new backup
will be from the new point in time, so it isn't a "resume" as much as it is
an "incremental retry." This can be useful in the case of extremely large
backups that fail considerably through the operation and we'd like to not waste
the work that was already performed.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-13-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This simplifies some interface matters; namely the initialization and
(later) merging the manifest back into the sync_bitmap if it was
provided.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-12-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Add a public interface for get. While we're at it,
rename "bdrv_get_dirty_bitmap_locked" to "bdrv_dirty_bitmap_get_locked".
(There are more functions to rename to the bdrv_dirty_bitmap_VERB form,
but they will wait until the conclusion of this series.)
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-11-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
I'm surprised it didn't come up sooner, but sometimes we have a +busy
bitmap as a source. This is dangerous from the QMP API, but if we are
the owner that marked the bitmap busy, it's safe to merge it using it as
a read only source.
It is not safe in the general case to allow users to read from in-use
bitmaps, so create an internal variant that foregoes the safety
checking.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-10-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
