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qemu_firmware: Try to autofill for old style UEFI specification

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While we discourage people to use the old style of specifying
UEFI for their domains (the old style is putting path to the FW
image under /domain/os/loader/ whilst the new one is using
/domain/os/@firmware), some applications might have not adapted
yet. They still rely on libvirt autofilling NVRAM path and
figuring out NVRAM template when using the old way (notably
virt-install does this). We must preserve backcompat for this
previously supported config approach. However, since we really
want distro maintainers to leave --with-loader-nvram configure
option and rely on JSON descriptors, we need to implement
autofilling of NVRAM template for the old way too.

Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=1782778
RHEL: https://bugzilla.redhat.com/show_bug.cgi?id=1776949

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Michal Privoznik 2019-12-17 17:45:50 +01:00
parent 7c5264d2be
commit 8e1804f9f6
1 changed files with 42 additions and 5 deletions
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47
src/qemu/qemu_firmware.c
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@ -959,6 +959,21 @@ qemuFirmwareMatchDomain(const virDomainDef *def,
want = qemuFirmwareOSInterfaceTypeFromOsDefFirmware(def->os.firmware);
if (want == QEMU_FIRMWARE_OS_INTERFACE_NONE &&
def->os.loader) {
want = qemuFirmwareOSInterfaceTypeFromOsDefFirmware(def->os.loader->type);
if (fw->mapping.device != QEMU_FIRMWARE_DEVICE_FLASH ||
STRNEQ(def->os.loader->path, fw->mapping.data.flash.executable.filename)) {
VIR_DEBUG("Not matching FW interface %s or loader "
"path '%s' for user provided path '%s'",
qemuFirmwareDeviceTypeToString(fw->mapping.device),
fw->mapping.data.flash.executable.filename,
def->os.loader->path);
return false;
}
}
for (i = 0; i < fw->ninterfaces; i++) {
if (fw->interfaces[i] == want)
break;
@ -1226,14 +1241,29 @@ qemuFirmwareFillDomain(virQEMUDriverPtr driver,
qemuFirmwarePtr *firmwares = NULL;
ssize_t nfirmwares = 0;
const qemuFirmware *theone = NULL;
bool needResult = true;
size_t i;
int ret = -1;
if (!(flags & VIR_QEMU_PROCESS_START_NEW))
return 0;
if (def->os.firmware == VIR_DOMAIN_OS_DEF_FIRMWARE_NONE)
return 0;
/* Fill in FW paths if either os.firmware is enabled, or
* loader path was provided with no nvram varstore. */
if (def->os.firmware == VIR_DOMAIN_OS_DEF_FIRMWARE_NONE) {
/* This is horrific check, but loosely said, if UEFI
* image was provided by the old method (by specifying
* its path in domain XML) but no template for NVRAM was
* specified and the varstore doesn't exist ... */
if (!virDomainDefHasOldStyleROUEFI(def) ||
def->os.loader->templt ||
virFileExists(def->os.loader->nvram))
return 0;
/* ... then we want to consult JSON FW descriptors first,
* but we don't want to fail if we haven't found a match. */
needResult = false;
}
if ((nfirmwares = qemuFirmwareFetchParsedConfigs(driver->privileged,
&firmwares, &paths)) < 0)
@ -1249,9 +1279,16 @@ qemuFirmwareFillDomain(virQEMUDriverPtr driver,
}
if (!theone) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Unable to find any firmware to satisfy '%s'"),
virDomainOsDefFirmwareTypeToString(def->os.firmware));
if (needResult) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Unable to find any firmware to satisfy '%s'"),
virDomainOsDefFirmwareTypeToString(def->os.firmware));
} else {
VIR_DEBUG("Unable to find NVRAM template for '%s', "
"falling back to old style",
NULLSTR(def->os.loader ? def->os.loader->path : NULL));
ret = 0;
}
goto cleanup;
}