[PATCH V4 06/18] qemu: Add function to get migration params for save

Introduce qemuMigrationParamsForSave() to create a qemuMigrationParams object initialized with appropriate migration capabilities and parameters for a save operation. Note that mapped-ram capability also requires the multifd capability. For now, the number of multifd channels is set to 1. Future work to support parallel save/restore can set the number of channels to a user-specified value. Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/qemu/qemu_migration.c | 2 +- src/qemu/qemu_migration_params.c | 21 +++++++++++++++++++++ src/qemu/qemu_migration_params.h | 3 +++ 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index e1399806d5..8753fb5358 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -7139,7 +7139,7 @@ qemuMigrationSrcToFile(virQEMUDriver *driver, virDomainObj *vm, /* Increase migration bandwidth to unlimited since target is a file. * Failure to change migration speed is not fatal. */ - if (!(migParams = qemuMigrationParamsNew())) + if (!(migParams = qemuMigrationParamsForSave(false))) return -1; if (qemuMigrationParamsSetULL(migParams, diff --git a/src/qemu/qemu_migration_params.c b/src/qemu/qemu_migration_params.c index 4fc9199f1c..d48cdd5506 100644 --- a/src/qemu/qemu_migration_params.c +++ b/src/qemu/qemu_migration_params.c @@ -792,6 +792,27 @@ qemuMigrationParamsFromFlags(virTypedParameterPtr params, } +qemuMigrationParams * +qemuMigrationParamsForSave(bool sparse) +{ + g_autoptr(qemuMigrationParams) saveParams = NULL; + + if (!(saveParams = qemuMigrationParamsNew())) + return NULL; + + if (sparse) { + if (virBitmapSetBit(saveParams->caps, QEMU_MIGRATION_CAP_MAPPED_RAM) < 0) + return NULL; + if (virBitmapSetBit(saveParams->caps, QEMU_MIGRATION_CAP_MULTIFD) < 0) + return NULL; + saveParams->params[QEMU_MIGRATION_PARAM_MULTIFD_CHANNELS].value.i = 1; + saveParams->params[QEMU_MIGRATION_PARAM_MULTIFD_CHANNELS].set = true; + } + + return g_steal_pointer(&saveParams); +} + + int qemuMigrationParamsDump(qemuMigrationParams *migParams, virTypedParameterPtr *params, diff --git a/src/qemu/qemu_migration_params.h b/src/qemu/qemu_migration_params.h index 2379950ce9..88a1bc1a66 100644 --- a/src/qemu/qemu_migration_params.h +++ b/src/qemu/qemu_migration_params.h @@ -87,6 +87,9 @@ qemuMigrationParamsFromFlags(virTypedParameterPtr params, unsigned int flags, qemuMigrationParty party); +qemuMigrationParams * +qemuMigrationParamsForSave(bool sparse); + int qemuMigrationParamsDump(qemuMigrationParams *migParams, virTypedParameterPtr *params, -- 2.43.0