This series of patches adds support for migrating vTPMs across hosts whose storage has been set up to share the directory structure holding the state of the TPM (swtpm). The domain XML is extended with a shared_storage attribute that must be set to 'yes' when shared storage is used. It influences the management of the directory structure holding the TPM state, which for example is only to be removed when a domain is undefined (virsh undefine) and not when a VM is removed on the migration source host. Further, when shared storage is used security labeling on the destination side is skipped assuming that the labeling was already done on the source side. I have tested this with an NFS setup where I had to turn SELinux off on the hosts since the SELinux MLS range labeling is not supported. Share storage migration requires the upcoming swtpm v0.8 with the PR for shared storage merged: https://github.com/stefanberger/swtpm/pull/732 Stefan Stefan Berger (7): qemu: tpm: Pass parameter indicating reason for domain removal util: Add parsing support for swtpm's cmdarg-migration capability qemu: tpm: Conditionally create storage on incoming migration qemu: tpm: Pass --migration option to swtpm when using shared storage qemu: tpm: Avoid security labels on incoming migration with shared storage qemu: tpm: Remove TPM state files and directory only when undefining a VM qemu: config: Extend TPM domain XML with shared storage support docs/formatdomain.rst | 16 ++++++++ src/conf/domain_conf.c | 13 +++++++ src/conf/domain_conf.h | 1 + src/conf/schemas/domaincommon.rng | 5 +++ src/qemu/qemu_domain.c | 12 +++--- src/qemu/qemu_domain.h | 8 +++- src/qemu/qemu_driver.c | 20 +++++----- src/qemu/qemu_extdevice.c | 5 ++- src/qemu/qemu_extdevice.h | 3 +- src/qemu/qemu_migration.c | 13 ++++--- src/qemu/qemu_process.c | 4 +- src/qemu/qemu_snapshot.c | 4 +- src/qemu/qemu_tpm.c | 61 ++++++++++++++++++++++++++----- src/qemu/qemu_tpm.h | 3 +- src/util/virtpm.c | 1 + src/util/virtpm.h | 1 + 16 files changed, 131 insertions(+), 39 deletions(-) -- 2.37.1
