[PATCH v3 2/6] qemu: tpm: Conditionally create storage on incoming migration

[Stefan Berger <stefanb@xxxxxxxxxxxxx>]

Do not create storage if the TPM state files are on shared storage and
there's an incoming migration since in this case the storage directory
must already exist. Also do not run swtpm_setup in this case.

Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
---
 src/qemu/qemu_tpm.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index dc09c94a4d..a45ad599aa 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -556,11 +556,19 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDef *tpm,
     int pwdfile_fd = -1;
     int migpwdfile_fd = -1;
     const unsigned char *secretuuid = NULL;
+    bool create_storage = true;
 
     if (!swtpm)
         return NULL;
 
-    if (qemuTPMEmulatorCreateStorage(tpm, &created, swtpm_user, swtpm_group) < 0)
+    /* Do not create storage and run swtpm_setup on incoming migration over
+     * shared storage
+     */
+    if (incomingMigration && virFileIsSharedFS(tpm->data.emulator.storagepath))
+        create_storage = false;
+
+    if (create_storage &&
+        qemuTPMEmulatorCreateStorage(tpm, &created, swtpm_user, swtpm_group) < 0)
         return NULL;
 
     if (tpm->data.emulator.hassecretuuid)
-- 
2.37.3