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migration: Allow "device add" options to only add migratable devices

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Introduce checks for the unmigratable flag in the VMStateDescription
structs of respective devices when user attempts to add them. If the
"--only-migratable" was specified, all unmigratable devices will
rightly fail to add. This feature is made compatible for both "-device"
and "-usbdevice" command line options and covers their hmp and qmp
counterparts as well.

Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Message-Id: <1484566314-3987-4-git-send-email-ashijeetacharya@gmail.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Ashijeet Acharya 2017-01-16 17:01:52 +05:30 • committed by Dr. David Alan Gilbert
parent d15c05fc1f
commit a3a3d8c738
2 changed files with 28 additions and 0 deletions
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9
qdev-monitor.c
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@ -29,6 +29,7 @@
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "sysemu/block-backend.h"
#include "migration/migration.h"
/*
* Aliases were a bad idea from the start. Let's keep them
@ -577,6 +578,14 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
return NULL;
}
if (only_migratable) {
if (dc->vmsd->unmigratable) {
error_setg(errp, "Device %s is not migratable, but "
"--only-migratable was specified", driver);
return NULL;
}
}
/* find bus */
path = qemu_opt_get(opts, "bus");
if (path != NULL) {