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qemu: domain: Add helper to check if encrypted secrets can be used with a VM

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This helper checks that the vm has the master key setup and libvirt
supports the given encryption algorithm.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2018-05-22 16:36:20 +02:00
parent 538703ba6f
commit 2d309f961e
2 changed files with 19 additions and 2 deletions
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19
src/qemu/qemu_domain.c
View File

@ -1292,6 +1292,22 @@ qemuDomainSecretAESSetup(qemuDomainObjPrivatePtr priv,
}
/**
* qemuDomainSupportsEncryptedSecret:
* @priv: qemu domain private data
*
* Returns true if libvirt can use encrypted 'secret' objects with VM which
* @priv belongs to.
*/
bool
qemuDomainSupportsEncryptedSecret(qemuDomainObjPrivatePtr priv)
{
return virCryptoHaveCipher(VIR_CRYPTO_CIPHER_AES256CBC) &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET) &&
priv->masterKey;
}
/* qemuDomainSecretSetup:
* @priv: pointer to domain private object
* @secinfo: Pointer to secret info
@ -1320,8 +1336,7 @@ qemuDomainSecretSetup(qemuDomainObjPrivatePtr priv,
bool iscsiHasPS = virQEMUCapsGet(priv->qemuCaps,
QEMU_CAPS_ISCSI_PASSWORD_SECRET);
if (virCryptoHaveCipher(VIR_CRYPTO_CIPHER_AES256CBC) &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET) &&
if (qemuDomainSupportsEncryptedSecret(priv) &&
(usageType == VIR_SECRET_USAGE_TYPE_CEPH ||
(usageType == VIR_SECRET_USAGE_TYPE_ISCSI && iscsiHasPS) ||
usageType == VIR_SECRET_USAGE_TYPE_VOLUME ||

2
src/qemu/qemu_domain.h
View File

@ -831,6 +831,8 @@ int qemuDomainMasterKeyCreate(virDomainObjPtr vm);
void qemuDomainMasterKeyRemove(qemuDomainObjPrivatePtr priv);
bool qemuDomainSupportsEncryptedSecret(qemuDomainObjPrivatePtr priv);
void qemuDomainSecretInfoFree(qemuDomainSecretInfoPtr *secinfo)
ATTRIBUTE_NONNULL(1);