Add flag storage to qemu-thread-* to store the namethreads flag
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This patch adds the Divide Doubleword Extended instructions.
The implementation builds on the unsigned helper provided in
the previous patch.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds the Divide Doubleword Extended Unsigned
instructions. This instruction requires dividing a 128-bit
value by a 64 bit value. Since 128 bit integer division is
not supported in TCG, a helper is used. An architecture
independent 128-bit division routine is added to host-utils.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
[agraf: use ||]
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Compiling util/modules.c with modules enabled fails now.
Fix it by including qemu-common.h before #ifdef testing in module.c.
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1393453893-12125-1-git-send-email-famz@redhat.com
Reviewed-by: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
gmodule-2.0's pkg-config files include -Wl,--export-dynamic, which breaks
static builds. It is a glib bug, but we need to support --static builds for
the linux-user targets, and in the end all that is needed to fix this is:
* outlaw --enable-modules --static, which makes little sense anyway
* only include gmodule-2.0's cflags and ldflags if --enable-modules is
specified on the command line.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1393346215-5636-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Block patches
# gpg: Signature made Fri 21 Feb 2014 21:42:24 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
* remotes/kevin/tags/for-upstream: (54 commits)
iotests: Mixed quorum child device specifications
quorum: Simplify quorum_open()
quorum: Add unit test.
quorum: Add quorum_open() and quorum_close().
quorum: Implement recursive .bdrv_recurse_is_first_non_filter in quorum.
quorum: Add quorum_co_flush().
quorum: Add quorum_invalidate_cache().
quorum: Add quorum_getlength().
quorum: Add quorum mechanism.
quorum: Add quorum_aio_readv.
blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify.
quorum: Add quorum_aio_writev and its dependencies.
quorum: Create BDRVQuorumState and BlkDriver and do init.
quorum: Create quorum.c, add QuorumChildRequest and QuorumAIOCB.
check-qdict: Test termination of qdict_array_split()
check-qdict: Adjust test for qdict_array_split()
qdict: Extract non-QDicts in qdict_array_split()
qemu-config: Sections must consist of keys
qemu-iotests: Check qemu-img command line parsing
qemu-img: Allow -o help with incomplete argument list
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* remotes/bonzini/configure:
build: softmmu targets do not have a "main.o" file
configure: Disable libtool if -fPIE does not work with it (bug #1257099)
block: convert block drivers linked with libs to modules
Makefile: introduce common-obj-m and block-obj-m for DSO
Makefile: install modules with "make install"
module: implement module loading
rules.mak: introduce DSO rules
darwin: do not use -mdynamic-no-pic
block: use per-object cflags and libs
rules.mak: allow per object cflags and libs
rules.mak: fix $(obj) to a real relative path
util: Split out exec_dir from os_find_datadir
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
qemu_iovec_compare() will be used to compare IOs vectors in quorum blkverify
mode. The patch extracts these functions in order to factorize the code.
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In config_parse_qdict_section(), the QList returned by
qdict_array_split() is assumed to only contain QDicts. Currently, this
is true but it may (and will) change in the future. Therefore, check
whether the assumption actually holds.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
has_help_option() checks if any help option ('help' or '?') occurs
anywhere in an option string, so that things like 'cluster_size=4k,help'
are recognised.
is_valid_option_list() ensures that the option list doesn't have options
with leading commas or trailing unescaped commas.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This patch adds loading, stamp checking and initialization of modules.
The init function of dynamic module is no longer directly called as
__attribute__((constructor)) in static linked version, it is called
only after passed the checking of presense of stamp symbol:
qemu_stamp_$RELEASEHASH
where $RELEASEHASH is generated by hashing version strings and content
of configure script.
With this, modules built from a different tree/version/configure will
not be loaded.
The module loading code requires gmodule-2.0.
Modules are searched under
- CONFIG_MODDIR
- executable folder (to allow running qemu-{img,io} in the build
directory)
- ../ of executable folder (to allow running system emulator in the
build directory)
Modules are linked under their subdir respectively, then copied to top
level of build directory for above convinience, e.g.:
$(BUILD_DIR)/block/curl.so -> $(BUILD_DIR)/block-curl.so
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
With this change, main() calls qemu_init_exec_dir and uses argv[0] to
init exec_dir. The saved value can be retrieved with
qemu_get_exec_dir later. It will be reused by module loading.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
error_is_set(&var) is the same as var != NULL, but it takes
whole-program analysis to figure that out. Unnecessarily hard for
optimizers, static checkers, and human readers. Dumb it down to
obvious.
Gets rid of several dozen Coverity false positives.
Note that the obvious form is already used in many places.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
To improve the predictability of fifo8_pop_buf(), the fifo head is set
to the start of data buffer upon a reset so that the first call to the
function will be able to retrieve all data in the fifo.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The patch adds functions fifo8_push_all() and fifo8_pop_buf() which
can be used respectively to push the content of a memory buffer to the
fifo and to pop multiple bytes obtaining a pointer to the fifo backing
buffer.
In addition, it implements fifo8_num_free() and fifo8_num_used() which
allow to check if a multi-byte operation can be performed.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
osdep.c does not use trace_*() so we can just drop the include.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
The functions used by qemu_memalign() require an alignment that is at
least sizeof(void*). Adjust it if it is too small.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoît Canet <benoit@irqsave.net>
Since commit a7aae221 ('Switch SIG_IPI to SIGUSR1'), SIGUSR1 is blocked
during startup, breaking the progress report in tools.
This patch reenables the signal when initialising a progress report.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
This function basically parses command-line options given as a QDict
replacing a config file.
For instance, the QDict {"section.opt1": 42, "section.opt2": 23}
corresponds to the config file:
[section]
opt1 = 42
opt2 = 23
It is possible to specify multiple sections and also multiple sections
of the same type. On the command line, this looks like the following:
inject-error.0.event=reftable_load,\
inject-error.1.event=l2_load,\
set-state.event=l1_update
This would correspond to the following config file:
[inject-error "inject-error.0"]
event = reftable_load
[inject-error "inject-error.1"]
event = l2_load
[set-state]
event = l1_update
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Using stdin with readline.c requires disabling echo and line buffering.
Add a portable wrapper to set the terminal attributes under Linux and
Windows.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Now that the monitor and readline are decoupled, readline.h no longer
belongs in include/monitor/. Put the header into include/qemu/.
Move the source file into util/ so it can be linked as part of
libqemuutil.a.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This reverts commit d32934c84c.
The original implementation before this patch makes abortive error
messages much more friendly. The underlying bug that required this
change is now fixed. Revert.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Use fprintf(stderr instead. This removes dependency of libqemuutil.a
on the monitor.
We can further justify this change, in that this code path should only
trigger under a fatal error condition. fprintf-stderr is probably the
appropriate medium as under a fatal error conidition the monitor itself
may be down and out for the count. So assertion failure messages should
go lowest common denominator - straight to stderr.
Fixes the build as reported by Kevin Wolf. Issue debugged and change
suggested by Luiz Capitulino. Issue introduced by
5d24ee70bc.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Move index and size fields from int to long. We need that for
migration. long is 64 bits on sane architectures, and 32bits should
be enough on all the 32bits architectures.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
This is a boiler-plate _nofail variant of qemu_opts_create. Remove and
use error_abort in call sites.
null/0 arguments needs to be added for the id and fail_if_exists fields
in affected callsites due to argument inconsistency between the normal and
no_fail variants.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Add a special Error * that can be passed to error handling APIs to
signal that any errors are fatal and should abort QEMU. There are two
advantages to this:
- allows for brevity when wishing to assert success of Error **
accepting APIs. No need for this pattern:
Error * local_err = NULL;
api_call(foo, bar, &local_err);
assert_no_error(local_err);
This also removes the need for _nofail variants of APIs with
asserting call sites now reduced to 1LOC.
- SIGABRT happens from within the offending API. When a fatal error
occurs in an API call (when the caller is asserting sucess) failure
often means the API itself is broken. With the abort happening in the
API call now, the stack frames into the call are available at debug
time. In the assert_no_error scheme the abort happens after the fact.
The exact semantic is that when an error is raised, if the argument
Error ** matches &error_abort, then the abort occurs immediately. The
error messaged is reported.
For error_propagate, if the destination error is &error_abort, then
the abort happens at propagation time.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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Merge remote-tracking branch 'kwolf/tags/for-anthony' into staging
Block patches for 2.0 (flushing block-next)
# gpg: Signature made Fri 29 Nov 2013 08:43:18 AM PST using RSA key ID C88F2FD6
# gpg: Can't check signature: public key not found
# By Peter Lieven (17) and others
# Via Kevin Wolf
* kwolf/tags/for-anthony: (41 commits)
qemu-iotests: Add sample image and test for VMDK version 3
vmdk: Allow read only open of VMDK version 3
qemu-iotests: Filter out 'qemu-io> ' prompt
qemu-iotests: Filter qemu-io output in 025
block: Use BDRV_O_NO_BACKING where appropriate
qemu-iotests: Test snapshot mode
block: Enable BDRV_O_SNAPSHOT with driver-specific options
qemu-iotests: Make test case 030, 040 and 055 deterministic
qemu-iotest: Add pause_drive and resume_drive methods
blkdebug: add "remove_break" command
qemu-iotests: Drop local version of cancel_and_wait from 040
sheepdog: support user-defined redundancy option
sheepdog: refactor do_sd_create()
qdict: Optimise qdict_do_flatten()
qdict: Fix memory leak in qdict_do_flatten()
MAINTAINERS: add sheepdog development mailing list
COW: Extend checking allocated bits to beyond one sector
COW: Speed up writes
qapi: Change BlockDirtyInfo to list
block: per caller dirty bitmap
...
Message-id: 1385743555-27888-1-git-send-email-kwolf@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
With this we no longer pass down envp, and thus all systems can have
the same void prototype. So also eliminate a useless thunk.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
There may be calls to error_setg() and especially error_setg_errno()
which blindly (and until now wrongly) assume these functions not to
clobber errno (e.g., they pass errno to error_setg_errno() and return
-errno afterwards). Instead of trying to find and fix all of these
constructs, just make sure error_setg() and error_setg_errno() indeed do
not clobber errno.
Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Currently we have three QemuOptsList (qemu_common_drive_opts,
qemu_legacy_drive_opts, and qemu_drive_opts), only qemu_drive_opts
is added to vm_config_groups[].
This patch changes query-command-line-options to access three local
QemuOptsLists for drive option, and merge the description items
together.
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This emulates Win32 manual-reset events using futexes or conditional
variables. Typical ways to use them are with multi-producer,
single-consumer data structures, to test for a complex condition whose
elements come from different threads:
for (;;) {
qemu_event_reset(ev);
... test complex condition ...
if (condition is true) {
break;
}
qemu_event_wait(ev);
}
Or more efficiently (but with some duplication):
... evaluate condition ...
while (!condition) {
qemu_event_reset(ev);
... evaluate condition ...
if (!condition) {
qemu_event_wait(ev);
... evaluate condition ...
}
}
QemuEvent provides a very fast userspace path in the common case when
no other thread is waiting, or the event is not changing state.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
qemu_thread_create already does signal blocking and detaching for us.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
blockdev-add shouldn't automatically generate IDs, but will keep most of
the DriveInfo creation code.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
# By Stefan Weil (5) and others
# Via Michael Tokarev
* mjt/trivial-patches:
migration: Fix compiler warning ('caps' may be used uninitialized)
util/path: Fix type which is longer than 8 bit for MinGW
hw/9pfs: Fix errno value for xattr functions
vl: Clean up unnecessary boot_order complications
qemu-char: Fix potential out of bounds access to local arrays
pci-ohci: Add missing 'break' in ohci_service_td
sh4: Fix serial line access for Linux kernels later than 3.2
hw/alpha: Fix compiler warning (integer constant is too large)
target-i386: Fix compiler warning (integer constant is too large)
block: Remove unused assignment (fixes warning from clang)
exec: cleanup DEBUG_SUBPAGE
tests: Fix schema parser test for in-tree build
tests: Update .gitignore for test-int128 and test-bitops
.gitignore: ignore tests/qemu-iotests/socket_scm_helper
Message-id: 1381051979-25742-1-git-send-email-mjt@msgid.tls.msk.ru
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
While dirent->d_type is 8 bit for most systems, it is 32 bit for MinGW.
Reducing it to 8 bit results in a compiler warning because the macro
is_dir_maybe compares that 8 bit value with 32 bit constants.
Using 'unsigned' instead of 'unsigned char' matches the declaration for
MinGW and does not harm the other systems.
MinGW-w64 is not affected: it does not declare d_type.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
SO_REUSEADDR should be avoided on Windows but is desired on other operating
systems. So instead of setting it we call socket_set_fast_reuse that will result
in the appropriate behaviour on all operating systems.
Signed-off-by: Sebastian Ottlik <ottlik@fzi.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
If a socket is closed it remains in TIME_WAIT state for some time. On operating
systems using BSD sockets the endpoint of the socket may not be reused while in
this state unless SO_REUSEADDR was set on the socket. On windows on the other
hand the default behaviour is to allow reuse (i.e. identical to SO_REUSEADDR on
other operating systems) and setting SO_REUSEADDR on a socket allows it to be
bound to a endpoint even if the endpoint is already used by another socket
independently of the other sockets state. This can even result in undefined
behaviour.
Many sockets used by QEMU should not block the use of their endpoint after being
closed while they are still in TIME_WAIT state. Currently QEMU sets SO_REUSEADDR
for such sockets, which can lead to problems on Windows. This patch introduces
the function socket_set_fast_reuse that should be used instead of setting
SO_REUSEADDR when fast socket reuse is desired and behaves correctly on all
operating systems.
As a failure of this function can only be caused by bad QEMU internal errors, an
assertion handles these situations. The return value is still passed on, to
minimize changes in client code and prevent unused variable warnings if NDEBUG
is defined.
Signed-off-by: Sebastian Ottlik <ottlik@fzi.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
# By Stefan Hajnoczi (4) and others
# Via Stefan Hajnoczi
* stefanha/block:
virtio-blk: do not relay a previous driver's WCE configuration to the current
blockdev: do not default cache.no-flush to true
block: don't lose data from last incomplete sector
qcow2: Correct snapshots size for overlap check
coroutine: fix /perf/nesting coroutine benchmark
coroutine: add qemu_coroutine_yield benchmark
qemu-timer: do not take the lock in timer_pending
qemu-timer: make qemu_timer_mod_ns() and qemu_timer_del() thread-safe
qemu-timer: drop outdated signal safety comments
osdep: warn if open(O_DIRECT) on fails with EINVAL
libcacard: link against qemu-error.o for error_report()
Message-id: 1379698931-946-1-git-send-email-stefanha@redhat.com
Print a warning when opening a file O_DIRECT fails with EINVAL. This
saves users a lot of time trying to figure out the EINVAL error, which
is typical when attempting to open a file O_DIRECT on Linux tmpfs.
Reported-by: Deepak C Shetty <deepakcs@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
We abort() on memory allocation failure. abort() is appropriate for
programming errors. Maybe most memory allocation failures are
programming errors, maybe not. But guest memory allocation failure
isn't, and aborting when the user asks for more memory than we can
provide is not nice. exit(1) instead, and do it in just one place, so
the error message is consistent.
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1375276272-15988-8-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
# By Tomoki Sekiyama (10) and Paul Burton (1)
# Via Michael Roth
* mdroth/qga-pull-2013-9-9:
QMP/qemu-ga-client: Make timeout longer for guest-fsfreeze-freeze command
qemu-ga: Install Windows VSS provider on `qemu-ga -s install'
qemu-ga: Call Windows VSS requester in fsfreeze command handler
qemu-ga: Add Windows VSS provider and requester as DLL
error: Add error_set_win32 and error_setg_win32
qemu-ga: Add configure options to specify path to Windows/VSS SDK
Add a script to extract VSS SDK headers on POSIX system
checkpatch.pl: Check .cpp files
Add c++ keywords to QAPI helper script
configure: Support configuring C++ compiler
mips_malta: support up to 2GiB RAM
Message-id: 1378755701-2051-1-git-send-email-mdroth@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
These functions help maintaining homogeneous formatting of error messages
with Windows error code and description (generated by
g_win32_error_message()).
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Implement the continuous leaky bucket algorithm devised on IRC as a separate
module.
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Adds an "assigned" flag to QEMUOptionParameter which is cleared at the
beginning of parse_option_parameters and set on (successful)
set_option_parameter and set_option_parameter_int.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Commit 6d4cd40 fixed qemu_opts_set_defaults() for an existing corner
case, but broke it for another one that can't be reached in current
code.
Quote from its commit message:
I believe [opts_parse()] attempts to do the following:
If options don't yet exist, create new options
Else, if defaults, modify the existing options
Else, if list->merge_lists, modify the existing options
Else, fail
The only caller that passes true for defaults is
qemu_opts_set_defaults().
The commit message then claims:
A straightforward call of qemu_opts_create() does exactly that.
Wrong. When !list->merge_lists, and the option string doesn't contain
id=, and options without ID exist, then we don't actually modify the
existing options, we create new ones.
Not reachable, because we never pass lists with !list->merge_lists to
qemu_opts_set_defaults().
Guard against possible (if unlikely) future misuse with assert().
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1375428840-5275-1-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
