[libvirt] [PATCH] qemu: Label master key file

[Martin Kletzander]

When creating the master key, we used mode 0600 (which we should) but
because we were creating it as root, the file is not readable by any
qemu running as non-root.  Fortunately, it's just a matter of labelling
the file.  We are generating the file path few times already, so let's
label it in the same function that has access to the path already.

Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
 src/qemu/qemu_domain.c  | 15 ++++++++++++---
 src/qemu/qemu_domain.h  |  3 ++-
 src/qemu/qemu_process.c |  2 +-
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 5d54fffcfb98..83e765ef6868 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -504,11 +504,13 @@ qemuDomainGetMasterKeyFilePath(const char *libDir)
  * Returns 0 on success, -1 on failure with error message indicating failure
  */
 static int
-qemuDomainWriteMasterKeyFile(qemuDomainObjPrivatePtr priv)
+qemuDomainWriteMasterKeyFile(virQEMUDriverPtr driver,
+                             virDomainObjPtr vm)
 {
     char *path;
     int fd = -1;
     int ret = -1;
+    qemuDomainObjPrivatePtr priv = vm->privateData;

     if (!(path = qemuDomainGetMasterKeyFilePath(priv->libDir)))
         return -1;
@@ -525,6 +527,10 @@ qemuDomainWriteMasterKeyFile(qemuDomainObjPrivatePtr priv)
         goto cleanup;
     }

+    if (virSecurityManagerDomainSetDirLabel(driver->securityManager,
+                                            vm->def, path) < 0)
+        goto cleanup;
+
     ret = 0;

  cleanup:
@@ -697,8 +703,11 @@ qemuDomainMasterKeyRemove(qemuDomainObjPrivatePtr priv)
  * Returns: 0 on success, -1 w/ error message on failure
  */
 int
-qemuDomainMasterKeyCreate(qemuDomainObjPrivatePtr priv)
+qemuDomainMasterKeyCreate(virQEMUDriverPtr driver,
+                          virDomainObjPtr vm)
 {
+    qemuDomainObjPrivatePtr priv = vm->privateData;
+
     /* If we don't have the capability, then do nothing. */
     if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET))
         return 0;
@@ -709,7 +718,7 @@ qemuDomainMasterKeyCreate(qemuDomainObjPrivatePtr priv)

     priv->masterKeyLen = QEMU_DOMAIN_MASTER_KEY_LEN;

-    if (qemuDomainWriteMasterKeyFile(priv) < 0)
+    if (qemuDomainWriteMasterKeyFile(driver, vm) < 0)
         goto error;

     return 0;
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index d8d57d32df5d..7d2c4fd92ae4 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -584,7 +584,8 @@ char *qemuDomainGetMasterKeyFilePath(const char *libDir);

 int qemuDomainMasterKeyReadFile(qemuDomainObjPrivatePtr priv);

-int qemuDomainMasterKeyCreate(qemuDomainObjPrivatePtr priv);
+int qemuDomainMasterKeyCreate(virQEMUDriverPtr driver,
+                              virDomainObjPtr vm);

 void qemuDomainMasterKeyRemove(qemuDomainObjPrivatePtr priv);

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index b1e270ff235e..787d78670dae 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -5218,7 +5218,7 @@ qemuProcessPrepareHost(virQEMUDriverPtr driver,
         goto cleanup;

     VIR_DEBUG("Create domain masterKey");
-    if (qemuDomainMasterKeyCreate(priv) < 0)
+    if (qemuDomainMasterKeyCreate(driver, vm) < 0)
         goto cleanup;

     ret = 0;
-- 
2.8.1