Currently, qemu-img convert writes zeroes when it reads zeroes.
Sometimes it does not because the target is initialized to zeroes
anyway, so we do not need to overwrite (and thus potentially allocate)
it. This is never the case for targets with backing files, though. But
even they may have an area that is initialized to zeroes, and that is
the area past the end of the backing file (if that is shorter than the
overlay).
So if the target format's unallocated blocks are zero and there is a gap
between the target's backing file's end and the target's end, we do not
have to explicitly write zeroes there.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1527898
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180501165750.19242-2-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509182002.8044-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Currently, rebase interprets a relative path for the new backing image
as follows:
(1) Open the new backing image with the given relative path (thus relative to
qemu-img's working directory).
(2) Write it directly into the overlay's backing path field (thus
relative to the overlay).
If the overlay is not in qemu-img's working directory, both will be
different interpretations, which may either lead to an error somewhere
(either rebase fails because it cannot open the new backing image, or
your overlay becomes unusable because its backing path does not point to
a file), or, even worse, it may result in your rebase being performed
for a different backing file than what your overlay will point to after
the rebase.
Fix this by interpreting the target backing path as relative to the
overlay, like qemu-img does everywhere else.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1569835
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180509182002.8044-2-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
As a showcase of how you can use qemu-io's exit code to determine
success or failure (same for qemu-img), this test is changed to use
qemu_io_silent() instead of qemu_io(), and to assert the exit code
instead of logging the filtered result.
One real advantage of this is that in case of an error, you get a
backtrace that helps you locate the issue in the test file quickly.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-6-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
With qemu-io now returning a useful exit code, some tests may find it
sufficient to just query that instead of logging (and filtering) the
whole output.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-5-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Currently, qemu-io basically always returns success when it gets to
interactive mode (so once the whole command line has been parsed; even
before the commands on the command line are interpreted). That is not
very useful.
This patch makes qemu-io return failure when any of the executed
commands failed.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1519617
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-4-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This is basically what everything else in the qemu code base does, so we
can do it here, too.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
For qemu-io, a function returns an integer with two possible values: 0
for "qemu-io may continue execution", or 1 for "qemu-io should exit".
However, there is only a single command that returns 1, and that is
"quit".
So let's turn this case into a global variable instead so we can make
better use of the return value in a later patch.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This adds a test for an I/O error during snapshot deletion, and maybe
more importantly, for how to repair the resulting image. If the
snapshot has been deleted before the error occurs, the only negative
result will be leaked clusters -- and those should be repairable with
qemu-img check -r leaks.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509200059.31125-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Repairing OFLAG_COPIED is usually safe because it is done after the
refcounts have been repaired. Therefore, it we did not find anyone else
referencing a data or L2 cluster, it makes no sense to not set
OFLAG_COPIED -- and the other direction (clearing OFLAG_COPIED) is
always safe, anyway, it may just induce leaks.
Furthermore, if OFLAG_COPIED is actually consistent with a wrong (leaky)
refcount, we will decrement the refcount with -r leaks, but OFLAG_COPIED
will then be wrong. qemu-img check should not produce images that are
more corrupted afterwards then they were before.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1527085
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509200059.31125-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This test case has been broken since 398e6ad014 (roughly half a
year). qemu-img amend requires its output image to be R/W, so it opens
it as such; the node is then turned into an read-only node automatically
which is now accompanied by a warning, however. This warning has not
been part of the reference output.
For one thing, this warning shows that we cannot keep the test case as
it is. We would need a format that has no create_opts but that does
have write support -- we do not have such a format, though.
Another thing is that qemu now actually checks whether an image format
supports amendment instead of whether it has create_opts (since the
former always implies the latter). So we can now use any format that
does not support amendment (even if it supports creation) and thus test
the same code path.
The reason nobody has noticed the breakage until now of course is the
fact that nobody runs the iotests for nbd+bochs. There actually was
never any reason to set the protocol to "nbd" but because that was
technically correct; functionally it made no difference. So that is the
first thing we are going to change: Make the protocol "file" instead so
that people might actually notice breakage here.
Secondly, now that bochs no longer works for the amend test case, we
have to change the format there anyway. Set let us just bend the truth
a bit, declare this test a raw test. In fact, that does not even
concern the bochs test cases, other than the output now reading 'bochs'
instead of 'IMGFMT'.
So with this test now being a raw test, we can rework the amend test
case to use raw instead.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20180509210023.20283-8-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This adds test cases to 082 for qemu-img create/convert/amend "-o help"
on formats that do not support creation or amendment, respectively.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509210023.20283-7-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
The only users of print_block_option_help() are qemu-img create and
qemu-img convert for the output image, so this function is always used
for image creation (it used to be used for amendment also, but that is
no longer the case).
So if image creation is not supported by either the format or the
protocol, there is no need to print any option description, because the
user cannot create an image like this anyway.
This also fixes an assertion failure:
$ qemu-img create -f bochs -o help
Supported options:
qemu-img: util/qemu-option.c:219:
qemu_opts_print_help: Assertion `list' failed.
[1] 24831 abort (core dumped) qemu-img create -f bochs -o help
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509210023.20283-6-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
The more generic print_block_option_help() function is not really
suitable for qemu-img amend, for a couple of reasons:
(1) We do not need to append the protocol-level options, as amendment
happens only on one node and does not descend downwards to its
children.
(2) print_block_option_help() says those options are "supported". For
option amendment, we do not really know that. So this new function
explicitly says that those options are the creation options, and not
all of them may be supported.
(3) If the driver does not support option amendment, we should not print
anything (except for an error message that amendment is not
supported).
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1537956
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509210023.20283-5-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
It really is up to the caller to decide what this list of options means.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509210023.20283-4-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Looking at the qcow2 code that is riddled with error_report() calls,
this is really how it should have been from the start.
Along the way, turn the target_version/current_version comparisons at
the beginning of qcow2_downgrade() into assertions (the caller has to
make sure these conditions are met), and rephrase the error message on
using compat=1.1 to get refcount widths other than 16 bits.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180509210023.20283-3-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Instead of checking whether a driver has a non-NULL create_opts we
should check whether it supports image amendment in the first place. If
it does, it must have create_opts.
On the other hand, if it does not have create_opts (so it does not
support amendment either), the error message "does not support any
options" is a bit useless. Stating clearly that the driver has no
amendment support whatsoever is probably better.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509210023.20283-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This patch adds a test case to 153 which tries to overwrite an image
(using qemu-img create) while it is in use. Without the original user
explicitly sharing the necessary permissions (writing and truncation),
this should not be allowed.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20180509215336.31304-4-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
When creating a file, we should take the WRITE and RESIZE permissions.
We do not need either for the creation itself, but we do need them for
clearing and resizing it. So we can take the proper permissions by
replacing O_TRUNC with an explicit truncation to 0, and by taking the
appropriate file locks between those two steps.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180509215336.31304-3-mreitz@redhat.com
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
raw_apply_lock_bytes() and raw_check_lock_bytes() currently take a
BDRVRawState *, but they only use the lock_fd field. During image
creation, we do not have a BDRVRawState, but we do have an FD; so if we
want to reuse the functions there, we should modify them to receive only
the FD.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20180509215336.31304-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
These were named incorrectly, going so far as to invade strace.list.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180607184844.30126-2-richard.henderson@linaro.org>
[lv: replace tabs by spaces]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Most of the binaries have a value of "UNIX - System V" for the OS/ABI.
But cc1 has a value of "UNIX - GNU", and if we don't update the binfmt
mask to ignore the OS/ABI field, gcc fails to execute it:
gcc: error trying to exec '/usr/lib/gcc/m68k-linux-gnu/7/cc1': execv: Exec format error
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180605194725.8585-1-laurent@vivier.eu>
linux-user targets don't need them, and if we ask to build statically
linked binaries, some static libraries they need are not available.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180605160958.5434-1-laurent@vivier.eu>
Rather than limit total TB size to PAGE-32 bytes, end the TB when
near the end of a page. This should provide proper semantics of
SIGSEGV when executing near the end of a page.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-9-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Removed ctx->insn_pc in favour of ctx->base.pc_next.
Yes, it is annoying, but didn't want to waste its 4 bytes.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-7-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The name gen_lookup_tb is at odds with tcg_gen_lookup_and_goto_tb.
For these cases, we do indeed want to exit back to the main loop.
Similarly, DISAS_UPDATE performs no actual update, whereas DISAS_EXIT
does what it says.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-6-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
These are all indirect or out-of-page direct jumps.
We can indirectly chain to the next TB without going
back to the main loop.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-5-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
We have exited the TB after using goto_tb; there is no
distinction from DISAS_NORETURN.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The raise_exception helper does not return. Do not generate
any code following that.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180512050250.12774-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
commit f548222c added PC_COMPAT_2_12 to the 3.0 PC machine-types.
I believe this happened during manual conflict resolution when
applying the patch.
Cc: Xiao Guangrong <xiaoguangrong@tencent.com>
Cc: Juan Quintela <quintela@redhat.com>
Fixes: f548222c24
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608192940.19548-1-ehabkost@redhat.com>
Reviewed-by: Marcel Apfelbaum<marcel.apfelbaum@gmail.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Python 2.7 (the minimum Python version we require) provides
collections.OrderedDict on the standard library, so we don't need
to carry our own implementation.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608175252.25110-3-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Python 2.7 (the minimum Python version we require) already
provides the argparse module on the standard library.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608175252.25110-2-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
All of the supported build platforms documented in qemu-doc.texi
should already support Python 2.7.
Removing support for Python 2.6 will allow us to remove some
compatibility modules we carry in the QEMU tree:
* scripts/argparse.py
* scripts/ordereddict.py
Python 2.6 is also not receiving bug fixes upstream and is not
supported by pylint, which makes it harder to keep the code
compatible with both Python 2 and Python 3.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608143026.20167-1-ehabkost@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Add information for cpuid 0x8000001D leaf. Populate cache topology information
for different cache types (Data Cache, Instruction Cache, L2 and L3) supported
by 0x8000001D leaf. Please refer to the Processor Programming Reference (PPR)
for AMD Family 17h Model for more details.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1527176614-26271-3-git-send-email-babu.moger@amd.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Always initialize CPUCaches structs with cache information, even
if legacy_cache=true. Use different CPUCaches struct for
CPUID[2], CPUID[4], and the AMD CPUID leaves.
This will simplify a lot the logic inside cpu_x86_cpuid().
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1527176614-26271-2-git-send-email-babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
