qemu/stubs/vm-stop.c

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "sysemu/sysemu.h"

void qemu_system_vmstop_request_prepare(void)
{
    abort();
}

void qemu_system_vmstop_request(RunState state)
{
    abort();
}
stubs: Clean up includes Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-3-git-send-email-peter.maydell@linaro.org 2016-01-30 01:49:52 +08:00			`#include "qemu/osdep.h"`
stubs: fully replace qemu-tool.c and qemu-user.c Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 2012-11-26 22:36:40 +08:00			`#include "qemu-common.h"`
			`#include "sysemu/sysemu.h"`

block: asynchronously stop the VM on I/O errors With virtio-blk dataplane, I/O errors might occur while QEMU is not in the main I/O thread. However, it's invalid to call vm_stop when we're neither in a VCPU thread nor in the main I/O thread, even if we were to take the iothread mutex around it. To avoid this problem, we can raise a request to the main I/O thread, similar to what QEMU does when vm_stop is called from a CPU thread. We know that bdrv_error_action is called from an AIO callback, and the moment at which the callback will fire is not well-defined; it depends on the moment at which the disk or OS finishes the operation, which can happen at any time. Note that QEMU is certainly not in a CPU thread and we do not need to call cpu_stop_current() like vm_stop() does. However, we need to ensure that any action taken by management will result in correct detection of the error _and_ a running VM. In particular: - the event must be raised after the iostatus has been set, so that "info block" will return an iostatus that matches the event. - the VM must be stopped after the iostatus has been set, so that "info block" will return an iostatus that matches the runstate. The ordering between the STOP and BLOCK_IO_ERROR events is preserved; BLOCK_IO_ERROR is documented to come first. This makes bdrv_error_action() thread safe (assuming QMP events are, which is attacked by a separate series). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> 2014-06-05 20:53:59 +08:00			`void qemu_system_vmstop_request_prepare(void)`
			`{`
			`abort();`
			`}`

			`void qemu_system_vmstop_request(RunState state)`
stubs: fully replace qemu-tool.c and qemu-user.c Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 2012-11-26 22:36:40 +08:00			`{`
			`abort();`
			`}`