[PATCH RFC 16/16] qemu: Add luks support for domain disk

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Generate the luks command line using the AES secret key to encrypt the
luks secret.

Add tests for sample output

Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
---
 src/qemu/qemu_command.c                            |  8 +++--
 src/qemu/qemu_domain.c                             | 42 ++++++++++++++--------
 .../qemuxml2argv-luks-disk-cipher.args             | 36 +++++++++++++++++++
 .../qemuxml2argvdata/qemuxml2argv-luks-disks.args  | 36 +++++++++++++++++++
 tests/qemuxml2argvtest.c                           | 11 +++++-
 5 files changed, 115 insertions(+), 18 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-luks-disk-cipher.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-luks-disks.args

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index b5d84e6..2181638 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1238,8 +1238,12 @@ qemuBuildDriveStr(virDomainDiskDefPtr disk,
         virBufferAddLit(&opt, ",");
 
         if (secinfo && secinfo->type == VIR_DOMAIN_SECRET_INFO_TYPE_AES) {
-            virBufferAsprintf(&opt, "password-secret=%s,",
-                              secinfo->s.aes.alias);
+            if (disk->src->format == VIR_STORAGE_FILE_LUKS)
+                virQEMUBuildLuksOpts(&opt, disk->src->encryption,
+                                     secinfo->s.aes.alias);
+            else
+                virBufferAsprintf(&opt, "password-secret=%s,",
+                                  secinfo->s.aes.alias);
         }
 
         if (disk->src->format > 0 &&
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 9b194bc..db12138 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -934,7 +934,8 @@ qemuDomainSecretSetup(virConnectPtr conn,
 {
     if (virCryptoHaveCipher(VIR_CRYPTO_CIPHER_AES256CBC) &&
         virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET) &&
-        secretUsageType == VIR_SECRET_USAGE_TYPE_CEPH) {
+        (secretUsageType == VIR_SECRET_USAGE_TYPE_CEPH ||
+         secretUsageType == VIR_SECRET_USAGE_TYPE_LUKS)) {
         if (qemuDomainSecretAESSetup(conn, priv, secinfo, srcalias,
                                      secretUsageType, username, secdef) < 0)
             return -1;
@@ -1017,27 +1018,38 @@ qemuDomainSecretDiskPrepare(virConnectPtr conn,
 {
     virStorageSourcePtr src = disk->src;
     qemuDomainSecretInfoPtr secinfo = NULL;
+    virSecretUsageType secretUsageType;
+    const char *username = NULL;
+    virSecretLookupTypeDefPtr secdef;
 
-    if (conn && !virStorageSourceIsEmpty(src) &&
-        virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_NETWORK &&
-        src->auth &&
-        (src->protocol == VIR_STORAGE_NET_PROTOCOL_ISCSI ||
-         src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD)) {
-
-        virSecretUsageType secretUsageType;
+    if (conn && !virStorageSourceIsEmpty(src)) {
         qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
 
-        if (VIR_ALLOC(secinfo) < 0)
-            return -1;
+        if (virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_NETWORK &&
+            src->auth &&
+            (src->protocol == VIR_STORAGE_NET_PROTOCOL_ISCSI ||
+             src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD)) {
+
+            secretUsageType =
+                qemuDomainSecretProtocolGetUsageType(src->protocol);
+            username = src->auth->username;
+            secdef = &src->auth->secdef;
+        } else if (src->encryption &&
+                   src->format == VIR_STORAGE_FILE_LUKS) {
+            secretUsageType = VIR_SECRET_USAGE_TYPE_LUKS;
+            secdef = &src->encryption->secrets[0]->secdef;
+        } else {
+            return 0;  /* No secret to attach */
+        }
 
-        if ((secretUsageType =
-             qemuDomainSecretProtocolGetUsageType(src->protocol)) ==
-            VIR_SECRET_USAGE_TYPE_NONE)
+        if (secretUsageType == VIR_SECRET_USAGE_TYPE_NONE)
             goto error;
 
+        if (VIR_ALLOC(secinfo) < 0)
+            return -1;
+
         if (qemuDomainSecretSetup(conn, priv, secinfo, disk->info.alias,
-                                  secretUsageType, src->auth->username,
-                                  &src->auth->secdef) < 0)
+                                  secretUsageType, username, secdef) < 0)
             goto error;
 
         diskPriv->secinfo = secinfo;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-luks-disk-cipher.args b/tests/qemuxml2argvdata/qemuxml2argv-luks-disk-cipher.args
new file mode 100644
index 0000000..6eebc87
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-luks-disk-cipher.args
@@ -0,0 +1,36 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu \
+-name encryptdisk \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-encryptdisk/master-key.aes \
+-M pc-i440fx-2.1 \
+-m 1024 \
+-smp 1 \
+-uuid 496898a6-e6ff-f7c8-5dc2-3cf410945ee9 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-encryptdisk/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-object secret,id=virtio-disk0-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive file=/storage/guest_disks/encryptdisk,key-secret=virtio-disk0-secret0,\
+format=luks,if=none,id=drive-virtio-disk0 \
+-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
+id=virtio-disk0 \
+-object secret,id=virtio-disk1-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive file=/storage/guest_disks/encryptdisk2,key-secret=virtio-disk1-secret0,\
+format=luks,if=none,id=drive-virtio-disk1 \
+-device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,\
+id=virtio-disk1 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-luks-disks.args b/tests/qemuxml2argvdata/qemuxml2argv-luks-disks.args
new file mode 100644
index 0000000..6eebc87
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-luks-disks.args
@@ -0,0 +1,36 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu \
+-name encryptdisk \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-encryptdisk/master-key.aes \
+-M pc-i440fx-2.1 \
+-m 1024 \
+-smp 1 \
+-uuid 496898a6-e6ff-f7c8-5dc2-3cf410945ee9 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-encryptdisk/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-object secret,id=virtio-disk0-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive file=/storage/guest_disks/encryptdisk,key-secret=virtio-disk0-secret0,\
+format=luks,if=none,id=drive-virtio-disk0 \
+-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
+id=virtio-disk0 \
+-object secret,id=virtio-disk1-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive file=/storage/guest_disks/encryptdisk2,key-secret=virtio-disk1-secret0,\
+format=luks,if=none,id=drive-virtio-disk1 \
+-device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,\
+id=virtio-disk1 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 0fca2fb..f5f324e 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -62,10 +62,17 @@ fakeSecretLookupByUsage(virConnectPtr conn,
     return virGetSecret(conn, uuid, usageType, usageID);
 }
 
+static virSecretPtr
+fakeSecretLookupByUUID(virConnectPtr conn,
+                       const unsigned char *uuid)
+{
+    return virGetSecret(conn, uuid, 0, "");
+}
+
 static virSecretDriver fakeSecretDriver = {
     .connectNumOfSecrets = NULL,
     .connectListSecrets = NULL,
-    .secretLookupByUUID = NULL,
+    .secretLookupByUUID = fakeSecretLookupByUUID,
     .secretLookupByUsage = fakeSecretLookupByUsage,
     .secretDefineXML = NULL,
     .secretGetXMLDesc = NULL,
@@ -1324,6 +1331,8 @@ mymain(void)
 
     DO_TEST("encrypted-disk", NONE);
     DO_TEST("encrypted-disk-usage", NONE);
+    DO_TEST("luks-disks", QEMU_CAPS_OBJECT_SECRET);
+    DO_TEST("luks-disk-cipher", QEMU_CAPS_OBJECT_SECRET);
 
     DO_TEST("memtune", NONE);
     DO_TEST("memtune-unlimited", NONE);
-- 
2.5.5

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