Follow the model set up for contiguous loads. This handles
watchpoints correctly for contiguous stores, recognizing the
exception before any changes to memory.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-16-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
With sve_cont_ldst_pages, the differences between first-fault and no-fault
are minimal, so unify the routines. With cpu_probe_watchpoint, we are able
to make progress through pages with TLB_WATCHPOINT set when the watchpoint
does not actually fire.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-14-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Handle all of the watchpoints for active elements all at once,
before we've modified the vector register. This removes the
TLB_WATCHPOINT bit from page[].flags, which means that we can
use the normal fast path via RAM.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
First use of the new helper functions, so we can remove the
unused markup. No longer need a scratch for user-only, as
we completely probe the page set before reading; system mode
still requires a scratch for MMIO.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The current interface includes a loop; change it to load a
single element. We will then be able to use the function
for ld{2,3,4} where individual vector elements are not adjacent.
Replace each call with the simplest possible loop over active
elements.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
For contiguous predicated memory operations, we want to
minimize the number of tlb lookups performed. We have
open-coded this for sve_ld1_r, but for correctness with
MTE we will need this for all of the memory operations.
Create a structure that holds the bounds of active elements,
and metadata for two pages. Add routines to find those
active elements, lookup the pages, and run watchpoints
for those pages.
Temporarily mark the functions unused to avoid Werror.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-10-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since we converted back to cpu_*_data_ra, we do not need to
do this ourselves.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Use the "normal" memory access functions, rather than the
softmmu internal helper functions directly.
Since fb901c905d, cpu_mem_index is now a simple extract
from env->hflags and not a large computation. Which means
that it's now more work to pass around this value than it
is to recompute it.
This only adjusts the primitives, and does not clean up
all of the uses within sve_helper.c.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We currently have target-endian versions of these operations,
but no easy way to force a specific endianness. This can be
helpful if the target has endian-specific operations, or a mode
that swaps endianness.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This new interface will allow targets to probe for a page
and then handle watchpoints themselves. This will be most
useful for vector predicated memory operations, where one
page lookup can be used for many operations, and one test
can avoid many watchpoint checks.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-6-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We have validated that addr+size does not cross a page boundary.
Therefore we need to validate exactly one page. We can achieve
that passing any value 1 <= x <= size to page_check_range.
Passing 1 will simplify the next patch.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-5-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The only caller of cpu_watchpoint_address_matches passes
TARGET_PAGE_SIZE, so the bug is not currently visible.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200508154359.7494-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200508154359.7494-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add trace event to display timer's counter value updates.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200504072822.18799-5-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The NRF51 series SoC have 3 timer peripherals, each having
4 counters. To help differentiate which peripheral is accessed,
display the timer ID in the trace events.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200504072822.18799-4-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
On the NRF51 series, all peripherals have a fixed I/O size
of 4KiB. Define NRF51_PERIPHERAL_SIZE and use it.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200504072822.18799-2-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The AST2600 handles this differently with the extra 'hardlock' state, so
move the testing to the soc specific class' write callback.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20200505090136.341426-1-joel@jms.id.au
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
There are minimal differences from Qemu's point of view between the A0
and A1 silicon revisions.
As the A1 exercises different code paths in u-boot it is desirable to
emulate that instead.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20200504093703.261135-1-joel@jms.id.au
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Calling access_el3_aa32ns() works for AArch32 only cores
but it does not handle 32-bit EL2 on top of 64-bit EL3
for mixed 32/64-bit cores.
Merge access_el3_aa32ns_aa64any() into access_el3_aa32ns()
and only use the latter.
Fixes: 68e9c2fe65 ("target-arm: Add VTCR_EL2")
Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20200505141729.31930-2-edgar.iglesias@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This is a boot stub that is similar to the code u-boot runs, allowing
the kernel to boot the secondary CPU.
u-boot works as follows:
1. Initialises the SMP mailbox area in the SCU at 0x1e6e2180 with default values
2. Copies a stub named 'mailbox_insn' from flash to the SCU, just above the
mailbox area
3. Sets AST_SMP_MBOX_FIELD_READY to a magic value to indicate the
secondary can begin execution from the stub
4. The stub waits until the AST_SMP_MBOX_FIELD_GOSIGN register is set to
a magic value
5. Jumps to the address in AST_SMP_MBOX_FIELD_ENTRY, starting Linux
Linux indicates it is ready by writing the address of its entrypoint
function to AST_SMP_MBOX_FIELD_ENTRY and the 'go' magic number to
AST_SMP_MBOX_FIELD_GOSIGN. The secondary CPU sees this at step 4 and
breaks out of it's loop.
To be compatible, a fixed qemu stub is loaded into the mailbox area. As
qemu can ensure the stub is loaded before execution starts, we do not
need to emulate the AST_SMP_MBOX_FIELD_READY behaviour of u-boot. The
secondary CPU's program counter points to the beginning of the stub,
allowing qemu to start secondaries at step four.
Reboot behaviour is preserved by resetting AST_SMP_MBOX_FIELD_GOSIGN
when the secondaries are reset.
This is only configured when the system is booted with -kernel and qemu
does not execute u-boot first.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
- qcow2: Fix preallocation on block devices
- backup: Make sure that source and target size match
- vmdk: Fix zero cluster handling
- Follow-up cleanups and fixes for the truncate changes
- iotests: Skip more tests if required drivers are missing
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Block layer patches:
- qcow2: Fix preallocation on block devices
- backup: Make sure that source and target size match
- vmdk: Fix zero cluster handling
- Follow-up cleanups and fixes for the truncate changes
- iotests: Skip more tests if required drivers are missing
# gpg: Signature made Fri 08 May 2020 13:39:55 BST
# gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg: issuer "kwolf@redhat.com"
# 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: (30 commits)
block: Drop unused .bdrv_has_zero_init_truncate
vhdx: Rework truncation logic
parallels: Rework truncation logic
ssh: Support BDRV_REQ_ZERO_WRITE for truncate
sheepdog: Support BDRV_REQ_ZERO_WRITE for truncate
rbd: Support BDRV_REQ_ZERO_WRITE for truncate
nfs: Support BDRV_REQ_ZERO_WRITE for truncate
file-win32: Support BDRV_REQ_ZERO_WRITE for truncate
gluster: Drop useless has_zero_init callback
qcow2: Fix preallocation on block devices
iotests/055: Use cache.no-flush for vmdk target
iotests: Backup with different source/target size
backup: Make sure that source and target size match
backup: Improve error for bdrv_getlength() failure
iotests/283: Use consistent size for source and target
iotests: vmdk: Enable zeroed_grained=on by default
vmdk: Flush only once in vmdk_L2update()
vmdk: Don't update L2 table for zero write on zero cluster
vmdk: Fix partial overwrite of zero cluster
vmdk: Fix zero cluster allocation
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now that there are no clients of bdrv_has_zero_init_truncate, none of
the drivers need to worry about providing it.
What's more, this eliminates a source of some confusion: a literal
reading of the documentation as written in ceaca56f and implemented in
commit 1dcaf527 claims that a driver which returns 0 for
bdrv_has_zero_init_truncate() must not return 1 for
bdrv_has_zero_init(); this condition was violated for parallels, qcow,
and sometimes for vdi, although in practice it did not matter since
those drivers also lacked .bdrv_co_truncate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-10-eblake@redhat.com>
Acked-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The vhdx driver uses truncation for image growth, with a special case
for blocks that already read as zero but which are only being
partially written. But with a bit of rearranging, it's just as easy
to defer the decision on whether truncation resulted in zeroes to the
actual allocation attempt, reducing the number of places that still
use bdrv_has_zero_init_truncate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-9-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The parallels driver tries to use truncation for image growth, but can
only do so when reads are guaranteed as zero. Now that we have a way
to request zero contents from truncation, we can defer the decision to
actual allocation attempts rather than up front, reducing the number
of places that still use bdrv_has_zero_init_truncate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-8-eblake@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Our .bdrv_has_zero_init_truncate can detect when the remote side
always zero fills; we can reuse that same knowledge to implement
BDRV_REQ_ZERO_WRITE by ignoring it when the server gives it to us for
free.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-7-eblake@redhat.com>
Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Our .bdrv_has_zero_init_truncate always returns 1 because sheepdog
always 0-fills; we can use that same knowledge to implement
BDRV_REQ_ZERO_WRITE by ignoring it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-6-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Our .bdrv_has_zero_init_truncate always returns 1 because rbd always
0-fills; we can use that same knowledge to implement
BDRV_REQ_ZERO_WRITE by ignoring it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-5-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Our .bdrv_has_zero_init_truncate returns 1 if we detect that the OS
always 0-fills; we can use that same knowledge to implement
BDRV_REQ_ZERO_WRITE by ignoring it when the OS gives it to us for
free.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-4-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When using bdrv_file, .bdrv_has_zero_init_truncate always returns 1;
therefore, we can behave just like file-posix, and always implement
BDRV_REQ_ZERO_WRITE by ignoring it since the OS gives it to us for
free (note that file-posix.c had to use an 'if' because it shared code
between regular files and block devices, but in file-win32.c,
bdrv_host_device uses a separate .bdrv_file_open).
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-3-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block.c already defaults to 0 if we don't provide a callback; there's
no need to write a callback that always fails.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200428202905.770727-2-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Calling bdrv_getlength() to get the pre-truncate file size will not
really work on block devices, because they have always the same length,
and trying to write beyond it will fail with a rather cryptic error
message.
Instead, we should use qcow2_get_last_cluster() and bdrv_getlength()
only as a fallback.
Before this patch:
$ truncate -s 1G test.img
$ sudo losetup -f --show test.img
/dev/loop0
$ sudo qemu-img create -f qcow2 -o preallocation=full /dev/loop0 64M
Formatting '/dev/loop0', fmt=qcow2 size=67108864 cluster_size=65536
preallocation=full lazy_refcounts=off refcount_bits=16
qemu-img: /dev/loop0: Could not resize image: Failed to resize refcount
structures: No space left on device
With this patch:
$ sudo qemu-img create -f qcow2 -o preallocation=full /dev/loop0 64M
Formatting '/dev/loop0', fmt=qcow2 size=67108864 cluster_size=65536
preallocation=full lazy_refcounts=off refcount_bits=16
qemu-img: /dev/loop0: Could not resize image: Failed to resize
underlying file: Preallocation mode 'full' unsupported for this
non-regular file
So as you can see, it still fails, but now the problem is missing
support on the block device level, so we at least get a better error
message.
Note that we cannot preallocate block devices on truncate by design,
because we do not know what area to preallocate. Their length is always
the same, the truncate operation does not change it.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200505141801.1096763-1-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
055 uses the backup block job to create a compressed backup of an
$IMGFMT image with both qcow2 and vmdk targets. However, cluster
allocation in vmdk is very slow because it flushes the image file after
each L2 update.
There is no reason why we need this level of safety in this test, so
let's disable flushes for vmdk. For the blockdev-backup tests this is
achieved by simply adding the cache.no-flush=on to the drive_add() for
the target. For drive-backup, the caching flags are copied from the
source node, so we'll also add the flag to the source node, even though
it is not vmdk.
This can make the test run significantly faster (though it doesn't make
a difference on tmpfs). In my usual setup it goes from ~45s to ~15s.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200505064618.16267-1-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This tests that the backup job catches situations where the target node
has a different size than the source node. It must also forbid resize
operations when the job is already running.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430142755.315494-5-kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Since the introduction of a backup filter node in commit 00e30f05d, the
backup block job crashes when the target image is smaller than the
source image because it will try to write after the end of the target
node without having BLK_PERM_RESIZE. (Previously, the BlockBackend layer
would have caught this and errored out gracefully.)
We can fix this and even do better than the old behaviour: Check that
source and target have the same image size at the start of the block job
and unshare BLK_PERM_RESIZE. (This permission was already unshared
before the same commit 00e30f05d, but the BlockBackend that was used to
make the restriction was removed without a replacement.) This will
immediately error out when starting the job instead of only when writing
to a block that doesn't exist in the target.
Longer target than source would technically work because we would never
write to blocks that don't exist, but semantically these are invalid,
too, because a backup is supposed to create a copy, not just an image
that starts with a copy.
Fixes: 00e30f05de
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1778593
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430142755.315494-4-kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_get_device_name() will be an empty string with modern management
tools that don't use -drive. Use bdrv_get_device_or_node_name() instead
so that the node name is used if the BlockBackend is anonymous.
While at it, start with upper case to make the message consistent with
the rest of the function.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200430142755.315494-3-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The test case forgot to specify the null-co size for the target node.
When adding a check to backup that both sizes match, this would fail
because of the size mismatch and not the behaviour that the test really
wanted to test.
Fixes: a541fcc27c
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430142755.315494-2-kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In order to avoid bitrot in the zero cluster code in VMDK, enable
zeroed_grain=on by default for the tests.
059 now unsets the default options because zeroed_grain=on works only
with some subformats and the test case tests many different subformats,
including those for which it doesn't work.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-7-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
If we have a backup L2 table, we currently flush once after writing to
the active L2 table and again after writing to the backup table. A
single flush is enough and makes things a little less slow.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-6-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
If a cluster is already zeroed, we don't have to call vmdk_L2update(),
which is rather slow because it flushes the image file.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-5-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When overwriting a zero cluster, we must not perform copy-on-write from
the backing file, but from a zeroed buffer.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-4-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
m_data must contain valid data even for zero clusters when no cluster
was allocated in the image file. Without this, zero writes segfault with
images that have zeroed_grain=on.
For zero writes, we don't want to allocate a cluster in the image file
even in compressed files.
Fixes: 524089bce4
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-3-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
m_data is used for zero clusters even though valid == 0. It really only
means that a new cluster was allocated in the image file. Rename it to
reflect this.
While at it, change it from int to bool, too.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-2-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
After commit f01643fb8b when an image is
extended and BDRV_REQ_ZERO_WRITE is set then the new clusters are
zeroized.
The code however does not detect correctly situations when the old and
the new end of the image are within the same cluster. The problem can
be reproduced with these steps:
qemu-img create -f qcow2 backing.qcow2 1M
qemu-img create -f qcow2 -F qcow2 -b backing.qcow2 top.qcow2
qemu-img resize --shrink top.qcow2 520k
qemu-img resize top.qcow2 567k
In the last step offset - zero_start causes an integer wraparound.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200504155217.10325-1-berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200430124713.3067-9-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200430124713.3067-8-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200430124713.3067-7-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Instead of looping in each test, let's better refactor vmdk target case
as a subclass.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200430124713.3067-6-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Drop check for no block-jobs: it's obvious that there no jobs
immediately after vm.launch().
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200430124713.3067-5-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Richard Henderson
Philippe Mathieu-Daudé
Joel Stanley
Edgar E. Iglesias
Peter Maydell
Eric Blake
Max Reitz
Kevin Wolf
Alberto Garcia
Vladimir Sementsov-Ogievskiy