[PATCH 5/7] qemu: tpm: Avoid security labels on incoming migration with shared storage
When using shared storage there is no need to apply security labels on the
storage since the files have to have been labeled already on the source
side and we must assume that the source and destination side have been
setup to use the same uid and gid for running swtpm as well as share the
same security labels. whether the security labels can be used at all
depends on the shared storage and whether and how it supports them.
Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com>
---
src/qemu/qemu_tpm.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index 8b3ef4e34e..20c7e92766 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -924,10 +924,19 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
virCommandSetPidFile(cmd, pidfile);
virCommandSetErrorFD(cmd, &errfd);
- if (qemuSecurityStartTPMEmulator(driver, vm, cmd,
- cfg->swtpm_user, cfg->swtpm_group,
- NULL, &cmdret) < 0)
- return -1;
+ if (incomingMigration &&
+ tpm->data.emulator.shared_storage) {
+ /* security labels must have been set up on source already */
+ if (qemuSecurityCommandRun(driver, vm, cmd,
+ cfg->swtpm_user, cfg->swtpm_group,
+ NULL, &cmdret) < 0) {
+ goto error;
+ }
+ } else if (qemuSecurityStartTPMEmulator(driver, vm, cmd,
+ cfg->swtpm_user, cfg->swtpm_group,
+ NULL, &cmdret) < 0) {
+ goto error;
+ }
if (cmdret < 0) {
/* virCommandRun() hidden in qemuSecurityStartTPMEmulator()
--
2.37.1