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qemu: command: Setup floppy drives via -device for blockdev

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To allow referring to the drives via the QOM id we need to setup the
floppy drives with a proper ID. This means that -device should be used
for them.

There are the following quirks:
- FDC needs to be instantiated prior to any floppy device
- floppy drive specified via -device does not support 'bootindex'
    (hacked around by passing bootindexA=1 to the FDC)

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2018-08-13 15:28:48 +02:00
parent fb64e176f4
commit 94e4530992
1 changed files with 31 additions and 11 deletions
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42
src/qemu/qemu_command.c
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@ -2060,6 +2060,10 @@ qemuBuildDiskDeviceStr(const virDomainDef *def,
goto error;
break;
case VIR_DOMAIN_DISK_BUS_FDC:
virBufferAsprintf(&opt, "floppy,unit=%d", disk->info.addr.drive.unit);
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unsupported disk bus '%s' with device setup"), bus);
@ -2181,17 +2185,20 @@ qemuBuildFloppyCommandLineControllerOptions(virCommandPtr cmd,
else
driveLetter = 'A';
if (qemuDomainDiskGetBackendAlias(disk, qemuCaps, &backendAlias) < 0)
goto cleanup;
if (backendAlias &&
virAsprintf(&backendStr, "drive%c=%s", driveLetter, backendAlias) < 0)
goto cleanup;
if (bootindex &&
virAsprintf(&bootindexStr, "bootindex%c=%u", driveLetter, bootindex) < 0)
goto cleanup;
/* with -blockdev we setup the floppy device and it's backend with -device */
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV)) {
if (qemuDomainDiskGetBackendAlias(disk, qemuCaps, &backendAlias) < 0)
goto cleanup;
if (backendAlias &&
virAsprintf(&backendStr, "drive%c=%s", driveLetter, backendAlias) < 0)
goto cleanup;
}
if (!explicitfdc) {
if (backendStr) {
virCommandAddArg(cmd, "-global");
@ -2304,7 +2311,8 @@ qemuBuildDiskCommandLine(virCommandPtr cmd,
return -1;
if (!qemuDiskBusNeedsDriveArg(disk->bus)) {
if (disk->bus != VIR_DOMAIN_DISK_BUS_FDC) {
if (disk->bus != VIR_DOMAIN_DISK_BUS_FDC ||
virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV)) {
virCommandAddArg(cmd, "-device");
if (!(optstr = qemuBuildDiskDeviceStr(def, disk, bootindex,
@ -2328,6 +2336,7 @@ qemuBuildDisksCommandLine(virCommandPtr cmd,
unsigned int bootCD = 0;
unsigned int bootFloppy = 0;
unsigned int bootDisk = 0;
bool blockdev = virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV);
for (i = 0; i < def->os.nBootDevs; i++) {
switch (def->os.bootDevs[i]) {
@ -2343,6 +2352,12 @@ qemuBuildDisksCommandLine(virCommandPtr cmd,
}
}
/* If we want to express the floppy drives via -device, the controller needs
* to be instantiated prior to that */
if (blockdev &&
qemuBuildFloppyCommandLineControllerOptions(cmd, def, qemuCaps, bootFloppy) < 0)
return -1;
for (i = 0; i < def->ndisks; i++) {
virDomainDiskDefPtr disk = def->disks[i];
unsigned int bootindex = 0;
@ -2363,12 +2378,17 @@ qemuBuildDisksCommandLine(virCommandPtr cmd,
}
}
if (qemuBuildDiskCommandLine(cmd, def, disk, qemuCaps,
bootindex) < 0)
/* The floppy device itself does not support the bootindex property
* so we need to set it up for the controller */
if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
bootindex = 0;
if (qemuBuildDiskCommandLine(cmd, def, disk, qemuCaps, bootindex) < 0)
return -1;
}
if (qemuBuildFloppyCommandLineControllerOptions(cmd, def, qemuCaps, bootFloppy) < 0)
if (!blockdev &&
qemuBuildFloppyCommandLineControllerOptions(cmd, def, qemuCaps, bootFloppy) < 0)
return -1;
return 0;