It is never called outside of block.c.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-2-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
The stubbed out Rocker monitor commands are the last remaining users
of QERR_FEATURE_DISABLED. They fail like this:
(qemu) info rocker mumble
Error: The feature 'rocker' is not enabled
The real rocker commands fail like this when the named object doesn't
exist:
Error: rocker mumble not found
If that's good enough when Rocker is enabled, then it's good enough
when it's disabled, so replace QERR_FEATURE_DISABLED with that, and
drop the macro.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-13-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
Get rid of a use of QERR_FEATURE_DISABLED, and improve the somewhat
imprecise error message
(qemu) x_colo_lost_heartbeat
Error: The feature 'colo' is not enabled
to
Error: VM is not in COLO mode
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-12-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
Get rid of a use of QERR_FEATURE_DISABLED, and improve the slightly
awkward error message
(qemu) info hotpluggable-cpus
Error: The feature 'query-hotpluggable-cpus' is not enabled
to
Error: machine does not support hot-plugging CPUs
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-11-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
replay_add_blocker() takes an Error *. All callers pass one created
like this:
error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "some feature");
Folding this into replay_add_blocker() simplifies the callers, losing
a bit of generality we haven't needed in more than six years.
Since there are no other uses of macro QERR_REPLAY_NOT_SUPPORTED,
replace the remaining one by its expansion, and drop the macro.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-10-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
slog()'s function comment advises to use QERR_QGA_LOGGING_DISABLED.
This macro never existed. The reference got added in commit
e3d4d25206 "guest agent: add guest agent RPCs/commands" along with
QERR_QGA_LOGGING_FAILED, so maybe that one was meant. However,
QERR_QGA_LOGGING_FAILED was never actually used, and was removed in
commit d73f0beadb "qerror.h: Remove unused error classes".
Drop the dangling reference.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-9-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
qmp_query_vm_generation_id() in stubs/vmgenid.c is the last user of
QERR_UNSUPPORTED outside qga/. Unlike the stubs we just dropped, it
is actually reachable, namely when CONFIG_ACPI_VMGENID is off. It
always fails like
(qemu) info vm-generation-id
Error: this feature or command is not currently supported
Turns out the real qmp_query_vm_generation_id() doesn't actually
depend on CONFIG_ACPI_VMGENID, and fails safely when it's off. Move
it to hw/core/machine-qmp-cmds.c, and drop the stub. The error
message becomes
Error: VM Generation ID device not found
Feels like an improvement to me.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
acpi_table_add() is only ever called on behalf of CLI option
-acpitable. Since qemu-options.hx sets @arch_mask to QEMU_ARCH_I386,
it is reachable only for these targets. Since they provide a real
acpi_table_add(), the stub is unreachable.
There's no point in unreachable code keeping QERR_UNSUPPORTED alive.
Dumb it down to g_assert_not_reached().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-7-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
smbios_entry_add() is only ever called on behalf of CLI option
-smbios. Since qemu-options.hx sets @arch_mask to QEMU_ARCH_I386 |
QEMU_ARCH_ARM, it is reachable only for these targets. Since they
provide a real smbios_entry_add(), the stub is unreachable.
There's no point in unreachable code keeping QERR_UNSUPPORTED alive.
Dumb it down to g_assert_not_reached().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-6-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
Get rid of a use of QERR_UNSUPPORTED, and improve the rather vague
error message
(qemu) nmi
Error: this feature or command is not currently supported
to
Error: machine does not provide NMIs
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-5-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The only way cpu_get_note_size() can return a negative value is
integer overflow in the non-stub versions, which is a programming
error. The stub version is not actually reachable, because the
cpu_get_dump_info() stub will fail first. Use assert(). This gets
rid of another use of QERR_UNSUPPORTED.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-4-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
Get rid of a use of QERR_UNSUPPORTED, and improve the rather vague
error message
(qemu) dump-guest-memory mumble
Error: this feature or command is not currently supported
to
Error: dumping guest memory is not supported on this target
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-3-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[Error message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
With the two major JSON-ish type hierarchies clarified for distinct
purposes; QAPIExpression for parsed expressions and JSONValue for
introspection data, remove this FIXME as no longer an action item.
A third JSON-y data type, _ExprValue, is not meant to represent JSON in
the abstract but rather only the possible legal return values from a
single function, get_expr(). It isn't appropriate to attempt to merge it
with either of the above two types.
In theory, it may be possible to define a completely agnostic
one-size-fits-all JSON type hierarchy that any other user could borrow -
in practice, it's tough to wrangle the differences between invariant,
covariant and contravariant types: input and output parameters demand
different properties of such a structure.
However, QAPIExpression serves to authoritatively type user input to the
QAPI parser, while JSONValue serves to authoritatively type qapi
generator *output* to be served back to client users at runtime via
QMP. The AST for these two types are different and cannot be wholly
merged into a unified syntax.
They could, in theory, share some JSON primitive definitions. In
practice, this is currently more trouble than it's worth with mypy's
current expressive power. As such, declare this "done enough for now".
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-7-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
We can remove this alias as it only has two usages now, and no longer
pays for the confusion of "yet another type".
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-6-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
This patch creates a new type, QAPIExpression, which represents a parsed
expression complete with QAPIDoc and QAPISourceInfo.
This patch turns parser.exprs into a list of QAPIExpression instead,
and adjusts expr.py to match.
This allows the types we specify in parser.py to be "remembered" all the
way through expr.py and into schema.py. Several assertions around
packing and unpacking this data can be removed as a result.
It also corrects a harmless typing error. Before the patch,
check_exprs() allegedly takes a List[_JSONObject]. It actually takes
a list of dicts of the form
{'expr': E, 'info': I, 'doc': D}
where E is of type _ExprValue, I is of type QAPISourceInfo, and D is
of type QAPIDoc. Key 'doc' is optional. This is not a _JSONObject!
Passes type checking anyway, because _JSONObject is Dict[str, object].
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-5-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message amended to point out the typing fix]
Pylint under 3.6 does not believe that Collection is subscriptable at
runtime. It is, making this a Pylint
bug. https://github.com/PyCQA/pylint/issues/2377
They closed it as fixed, but that doesn't seem to be true as of Pylint
2.13.9, the latest version you can install under Python 3.6. 2.13.9 was
released 2022-05-13, about seven months after the bug was closed.
The least-annoying fix here is to just use the concret type.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-4-jsnow@redhat.com>
[Dumbed down from Sequence[str] to List[str], commit message adjusted]
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Newer versions of pylint disable the "no-self-use" message by
default. Older versions don't, though. If we leave the suppressions in,
pylint yelps about useless options. Just tell pylint to shush.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230215000011.1725012-3-jsnow@redhat.com>
New versions of flake8 don't like same-line comments. (It's a version
newer than what fc37 ships, but it still makes my life easier to fix it
now.)
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230215000011.1725012-2-jsnow@redhat.com>
Documentation of enumeration value conditions lacks a 'may'. Fix
that.
Clarify SchemaInfo documentation for struct and union types.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230213132009.918801-3-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Commit 013b4efc9b "qapi: Add feature flags to remaining
definitions" (v5.0.0), commit 84ab008687 "qapi: Add feature flags to
struct members" (v5.0.0), and commit b6c18755e4 "qapi: Add feature
flags to enum members" (v6.2.0) neglected to update section
"Features". Make up for that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230213132009.918801-2-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
The pipenv tool was nice in theory, but in practice it's just too hard
to update selectively, and it makes using it a pain. The qemu.qmp repo
dropped pipenv support a while back and it's been functioning just fine,
so I'm backporting that change here to qemu.git.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20230210003147.1309376-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Pylint 2.16 adds a few new checks that cause the optional check-tox CI
job to fail.
1. The superfluous-parens check seems to be a bit more aggressive,
2. broad-exception-raised is new; it discourages "raise Exception".
Fix these minor issues and turn the lights green.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Beraldo Leal <bleal@redhat.com>
Message-id: 20230210003147.1309376-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Windows implementation of setjmp/longjmp is done in
C:/WINDOWS/system32/ucrtbase.dll. Alas, on arm64, it seems to *always*
perform stack unwinding, which crashes from generated code.
By using alternative implementation built in mingw, we avoid doing stack
unwinding and this fixes crash when calling longjmp.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221153006.20300-3-pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
ctr_el0 access is privileged on this platform and fails as an illegal
instruction.
Windows does not offer a way to flush data cache from userspace, and
only FlushInstructionCache is available in Windows API.
The generic implementation of flush_idcache_range uses,
__builtin___clear_cache, which already use the FlushInstructionCache
function. So we rely on that.
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221153006.20300-2-pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Mirroring the upstream gdb xml files, the two stack boundary
registers are separated out.
Reviewed-by: Edgar E. Iglesias <edgar@zeroasic.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Follow what kernel's full_exception() is doing.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-4-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Currently dying to one of the core_dump_signal()s deadlocks, because
dump_core_and_abort() calls start_exclusive() two times: first via
stop_all_tasks(), and then via preexit_cleanup() ->
qemu_plugin_user_exit().
There are a number of ways to solve this: resume after dumping core;
check cpu_in_exclusive_context() in qemu_plugin_user_exit(); or make
{start,end}_exclusive() recursive. Pick the last option, since it's
the most straightforward one.
Fixes: da91c19202 ("linux-user: Clean up when exiting due to a signal")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-3-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
fork()ed processes currently start with
current_cpu->in_exclusive_context set, which is, strictly speaking, not
correct, but does not cause problems (even assertion failures).
With one of the next patches, the code begins to rely on this value, so
fix it by always calling end_exclusive() in fork_end().
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-2-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The linux kernel's trap tables vector all unassigned trap
numbers to BAD_TRAP, which then raises SIGILL.
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reported-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
If an instruction straddles a page boundary, and the first page
was ram, but the second page was MMIO, we would abort. Handle
this as if both pages are MMIO, by setting the ram_addr_t for
the first page to -1.
Reported-by: Sid Manning <sidneym@quicinc.com>
Reported-by: Jørgen Hansen <Jorgen.Hansen@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Before this commit, when GDB attached an OS working on QEMU, order of FPU
stack registers printed by GDB command 'info float' was wrong. There was a
bug causing the problem in 'g' packets sent by QEMU to GDB. The packets have
values of registers of machine emulated by QEMU containing FPU stack
registers. There are 2 ways to specify a x87 FPU stack register. The first
is specifying by absolute indexed register names (R0, ..., R7). The second
is specifying by stack top relative indexed register names (ST0, ..., ST7).
Values of the FPU stack registers should be located in 'g' packet and be
ordered by the relative index. But QEMU had located these registers ordered
by the absolute index. After this commit, when QEMU reads registers to make
a 'g' packet, QEMU specifies FPU stack registers by the relative index.
Then, the registers are ordered correctly in the packet. As a result, GDB,
the packet receiver, can print FPU stack registers in the correct order.
Signed-off-by: TaiseiIto <taisei1212@outlook.jp>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <TY0PR0101MB4285923FBE9AD97CE832D95BA4E59@TY0PR0101MB4285.apcprd01.prod.exchangelabs.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging
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* tag 'net-pull-request' of https://github.com/jasowang/qemu:
vdpa: fix VHOST_BACKEND_F_IOTLB_ASID flag check
net: stream: add a new option to automatically reconnect
vmnet: stop recieving events when VM is stopped
net: Increase L2TPv3 buffer to fit jumboframes
hw/net/vmxnet3: allow VMXNET3_MAX_MTU itself as a value
hw/net/lan9118: log [read|write]b when mode_16bit is enabled rather than abort
net: Replace "Supported NIC models" with "Available NIC models"
net: Restore printing of the help text with "-nic help"
net: Move the code to collect available NIC models to a separate function
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now the fuzzers will reboot the guest between inputs.
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Merge tag 'pr-2023-02-16' of https://gitlab.com/a1xndr/qemu into staging
Replace fork-based fuzzing with reboots.
Now the fuzzers will reboot the guest between inputs.
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# gpg: Signature made Fri 17 Feb 2023 04:04:10 GMT
# gpg: using RSA key FAD4E2BF871375D6340517C44E661DDE583A964E
# gpg: Good signature from "Alexander Bulekov <alxndr@bu.edu>" [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: FAD4 E2BF 8713 75D6 3405 17C4 4E66 1DDE 583A 964E
* tag 'pr-2023-02-16' of https://gitlab.com/a1xndr/qemu:
docs/fuzz: remove mentions of fork-based fuzzing
fuzz: remove fork-fuzzing scaffolding
fuzz/i440fx: remove fork-based fuzzer
fuzz/virtio-blk: remove fork-based fuzzer
fuzz/virtio-net: remove fork-based fuzzer
fuzz/virtio-scsi: remove fork-based fuzzer
fuzz/generic-fuzz: add a limit on DMA bytes written
fuzz/generic-fuzz: use reboots instead of forks to reset state
fuzz: add fuzz_reset API
hw/sparse-mem: clear memory on reset
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We deprecated the C virtiofsd in commit 34deee7b6a
in v7.0 in favour of the Rust implementation at
https://gitlab.com/virtio-fs/virtiofsd
since then, the Rust version has had more development and
has held up well. It's time to say goodbye to the C version
that got us going.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Merge tag 'pull-virtiofs-20230216b' of https://gitlab.com/dagrh/qemu into staging
Remove C virtiofsd
We deprecated the C virtiofsd in commit 34deee7b6a
in v7.0 in favour of the Rust implementation at
https://gitlab.com/virtio-fs/virtiofsd
since then, the Rust version has had more development and
has held up well. It's time to say goodbye to the C version
that got us going.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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# gpg: Signature made Thu 16 Feb 2023 18:24:25 GMT
# gpg: using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A 9FA9 0516 331E BC5B FDE7
* tag 'pull-virtiofs-20230216b' of https://gitlab.com/dagrh/qemu:
virtiofsd: Swing deprecated message to removed-features
virtiofsd: Remove source
virtiofsd: Remove build and docs glue
virtiofsd: Remove test
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Historically, the critical dependency for both building and running
QEMU has been the distro packages. Because QEMU is written in C and C's
package management has been tied to distros (at least if you do not want
to bundle libraries with the binary, otherwise I suppose you could use
something like conda or wrapdb), C dependencies of QEMU would target the
version that is shipped in relatively old but still commonly used distros.
For non-C libraries, however, the situation is different, as these
languages have their own package management tool (cpan, pip, gem, npm,
and so on). For some of these languages, the amount of dependencies
for even a simple program can easily balloon to the point that many
distros have given up on packaging non-C code. For this reason, it has
become increasingly normal for developers to download dependencies into
a self-contained local environment, instead of relying on distro packages.
Fortunately, this affects QEMU only at build time, as qemu.git does
not package non-C artifacts such as the qemu.qmp package; but still,
as we make more use of Python, we experience a clash between a support
policy that is written for the C world, and dependencies (both direct
and indirect) that increasingly do not care for the distro versions
and are quick at moving past Python runtime versions that are declared
end-of-life.
For example, Python 3.6 has been EOL'd since December 2021 and Meson 0.62
(released the following March) already dropped support for it. Yet,
Python 3.6 is the default version of the Python runtime for RHEL/CentOS
8 and SLE 15, respectively the penultimate and the most recent version
of two distros that QEMU would like to support. (It is also the version
used by Ubuntu 18.04, but QEMU stopped supporting it in April 2022).
There are good reasons to move forward with the deprecation of Python
3.6 in QEMU as well: completing the configure->meson switch (which
requires Meson 0.63), and making the QAPI generator fully typed (which
requires newer versions of not just mypy but also Python, due to PEP563).
Fortunately, these long-term support distros do include newer versions of
the Python runtime. However, these more recent runtimes only come with
a very small subset of the Python packages that the distro includes.
Because most dependencies are optional tests (avocado, mypy, flake8)
and Meson is bundled with QEMU, the most noticeably missing package is
Sphinx (and the readthedocs theme). There are four possibilities:
* we change the support policy and stop supporting CentOS 8 and SLE 15;
not a good idea since CentOS 8 is not an unreasonable distro for us to
want to continue to support
* we keep supporting Python 3.6 until CentOS 8 and SLE 15 stop being
supported. This is a possibility---but we may want to revise the support
policy anyway because SLE 16 has not even been released, so this would
mean delaying those desirable reasons for perhaps three years;
* we support Python 3.6 just for building documentation, i.e. we are
careful not to use Python 3.7+ features in our Sphinx extensions but are
free to use them elsewhere. Besides being more complicated to understand
for developers, this can be quite limiting; parts of the QAPI generator
run at sphinx-build time, which would exclude one of the areas which
would benefit from a newer version of the runtime;
* we only support Python 3.7+, which means CentOS 8 CI and users
have to either install Sphinx from pip or disable documentation.
This proposed update to the support policy chooses the last of these
possibilities. It does by modifying three aspects of the support
policy:
* it introduces different support periods for *native* vs. *non-native*
dependencies. Non-native dependencies are currently Python ones only,
and for simplicity the policy only mentions Python; however, the concept
generalizes to other languages with a well-known upstream package
manager, that users of older distributions can fetch dependencies from;
* it opens up the possibility of taking non-native dependencies from their
own package index instead of using the version in the distribution. The
wording right now is specific to dependencies that are only required at
build time. In the future we may have to refine it if, for example, parts
of QEMU will be written in Rust; in that case, crates would be handled
in a similar way to submodules and vendored in the release tarballs.
* it mentions specifically that optional build dependencies are excluded
from the platform policy. Tools such as mypy don't affect the ability
to build QEMU and move fast enough that distros cannot standardize on
a single version of them (for example RHEL9 does not package them at
all, nor does it run them at rpmbuild time). In other cases, such as
cross compilers, we have alternatives.
Right now, non-native dependencies have to be download manually by
running "pip" before "configure". In the future, it will be desirable
for configure to set up a virtual environment and download them in the
same way that it populates git submodules (but, in this case, without
vendoring them in the release tarballs).
Just like with submodules, this would make things easier for people
that can afford accessing the network in their build environment; the
option to populate the build environment manually would remain for
people whose build machines lack network access. The change to the
support policy neither requires nor forbids this future change.
[Thanks to Daniel P. Berrangé, Peter Maydell and others for discussions
that were copied or summarized in the above commit message]
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: John Snow <jsnow@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- configure: Enable -Wthread-safety if present
- no_co_wrapper to fix bdrv_open*() calls from coroutine context
- curl fixes, including enablement of newer libcurl versions
- MAINTAINERS: drop Vladimir from parallels block driver
- hbitmap: fix hbitmap_status() return value for first dirty bit case
- file-posix: Fix assertion failure in write_zeroes after moving
bdrv_getlength() to co_wrapper
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging
Block layer patches
- configure: Enable -Wthread-safety if present
- no_co_wrapper to fix bdrv_open*() calls from coroutine context
- curl fixes, including enablement of newer libcurl versions
- MAINTAINERS: drop Vladimir from parallels block driver
- hbitmap: fix hbitmap_status() return value for first dirty bit case
- file-posix: Fix assertion failure in write_zeroes after moving
bdrv_getlength() to co_wrapper
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# gpg: Signature made Fri 17 Feb 2023 13:34:37 GMT
# 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
* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (22 commits)
hbitmap: fix hbitmap_status() return value for first dirty bit case
block/file-posix: don't use functions calling AIO_WAIT_WHILE in worker threads
MAINTAINERS: drop Vladimir from parallels block driver
block: temporarily hold the new AioContext of bs_top in bdrv_append()
block: Handle curl 7.55.0, 7.85.0 version changes
block: Assert non-coroutine context for bdrv_open_inherit()
block: Fix bdrv_co_create_opts_simple() to open images with no_co_wrapper
vpc: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
vmdk: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
vhdx: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
vdi: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
qed: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
qcow2: Fix open/create to open images with no_co_wrapper
qcow: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
parallels: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
luks: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
block: Create no_co_wrappers for open functions
block-coroutine-wrapper: Introduce no_co_wrapper
curl: Fix error path in curl_open()
configure: Enable -Wthread-safety if present
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The last return statement should return true, as we already evaluated that
start == next_dirty
Also, fix hbitmap_status() description in header
Cc: qemu-stable@nongnu.org
Fixes: a6426475a7 ("block/dirty-bitmap: introduce bdrv_dirty_bitmap_status()")
Signed-off-by: Andrey Zhadchenko <andrey.zhadchenko@virtuozzo.com>
Message-Id: <20230202181523.423131-1-andrey.zhadchenko@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When calling bdrv_getlength() in handle_aiocb_write_zeroes(), the
function creates a new coroutine and then waits that it finishes using
AIO_WAIT_WHILE.
The problem is that this function could also run in a worker thread,
that has a different AioContext from main loop and iothreads, therefore
in AIO_WAIT_WHILE we will have in_aio_context_home_thread(ctx) == false
and therefore
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
in the else branch will fail, crashing QEMU.
Aside from that, bdrv_getlength() is wrong also conceptually, because
it reads the BDS graph from another thread and is not protected by
any lock.
Replace it with raw_co_getlength, that doesn't create a coroutine and
doesn't read the BDS graph.
Reported-by: Ninad Palsule <ninad@linux.vnet.ibm.com>
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230209154522.1164401-1-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
I have to admit this is out of my scope now. Still feel free to Cc me
directly if my help is needed :)
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20230214182848.1564714-1-vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_append() is called with bs_top AioContext held, but
bdrv_attach_child_noperm() could change the AioContext of bs_top.
bdrv_replace_node_noperm() calls bdrv_drained_begin() starting from
commit 2398747128 ("block: Don't poll in bdrv_replace_child_noperm()").
bdrv_drained_begin() can call BDRV_POLL_WHILE that assumes the new lock
is taken, so let's temporarily hold the new AioContext to prevent QEMU
from failing in BDRV_POLL_WHILE when it tries to release the wrong
AioContext.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2168209
Reported-by: Aihua Liang <aliang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20230214171621.11574-1-sgarzare@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* 7.55.0 deprecates CURLINFO_CONTENT_LENGTH_DOWNLOAD in favour of a *_T
version, which returns curl_off_t instead of a double.
* 7.85.0 deprecates CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS in
favour of *_STR variants, specifying the desired protocols via a
string.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1440
Signed-off-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230123201431.23118-1-anjo@rev.ng>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-14-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_co_create_opts_simple() runs in a coroutine. Therefore it is not
allowed to open images directly. Fix the call to use the corresponding
no_co_wrapper instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-13-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-12-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-11-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-10-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-9-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-8-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
