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qemu: Validate firmware blob configuration

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There are recommendations and limitations to the name of the
config blobs we need to follow [1].

We don't want users to change any value only add new blobs. This
means, that the name must have "opt/" prefix and at the same time
must not begin with "opt/ovmf" nor "opt/org.qemu" as these are
reserved for OVMF or QEMU respectively.

1: docs/specs/fw_cfg.txt from qemu.git

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Michal Privoznik 2020-06-02 16:38:05 +02:00
parent 3dda889a44
commit b5f8f04989
1 changed files with 32 additions and 0 deletions
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32
src/qemu/qemu_validate.c
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@ -762,6 +762,33 @@ qemuValidateDefGetVcpuHotplugGranularity(const virDomainDef *def)
}
static int
qemuValidateDomainDefSysinfo(const virSysinfoDef *def,
virQEMUCapsPtr qemuCaps G_GNUC_UNUSED)
{
size_t i;
for (i = 0; i < def->nfw_cfgs; i++) {
const virSysinfoFWCfgDef *f = &def->fw_cfgs[i];
if (!STRPREFIX(f->name, "opt/")) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Invalid firmware name"));
return -1;
}
if (STRPREFIX(f->name, "opt/ovmf/") ||
STRPREFIX(f->name, "opt/org.qemu/")) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("That firmware name is reserved"));
return -1;
}
}
return 0;
}
int
qemuValidateDomainDef(const virDomainDef *def,
void *opaque)
@ -978,6 +1005,11 @@ qemuValidateDomainDef(const virDomainDef *def,
}
}
for (i = 0; i < def->nsysinfo; i++) {
if (qemuValidateDomainDefSysinfo(def->sysinfo[i], qemuCaps) < 0)
return -1;
}
return 0;
}