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qemu: migration: Implement VIR_MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES

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Use it to enable the 'write-blocking' mode of 'blockdev-mirror'.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2021-12-02 16:54:57 +01:00
parent 51d1c08fe9
commit f88d0ea2cd
2 changed files with 14 additions and 3 deletions
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16
src/qemu/qemu_migration.c
View File

@ -931,7 +931,8 @@ qemuMigrationSrcNBDStorageCopyBlockdev(virQEMUDriver *driver,
const char *socket,
unsigned long long mirror_speed,
unsigned int mirror_shallow,
const char *tlsAlias)
const char *tlsAlias,
bool syncWrites)
{
g_autoptr(qemuBlockStorageSourceAttachData) data = NULL;
qemuDomainDiskPrivate *diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
@ -960,7 +961,7 @@ qemuMigrationSrcNBDStorageCopyBlockdev(virQEMUDriver *driver,
mon_ret = qemuMonitorBlockdevMirror(qemuDomainGetMonitor(vm), jobname, persistjob,
sourcename, copysrc->nodeformat,
mirror_speed, 0, 0, mirror_shallow,
false);
syncWrites);
if (mon_ret != 0)
qemuBlockStorageSourceAttachRollback(qemuDomainGetMonitor(vm), data);
@ -1034,6 +1035,7 @@ qemuMigrationSrcNBDStorageCopyOne(virQEMUDriver *driver,
const char *jobname = NULL;
const char *sourcename = NULL;
bool persistjob = false;
bool syncWrites = !!(flags & VIR_MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES);
int rc;
int ret = -1;
@ -1063,7 +1065,8 @@ qemuMigrationSrcNBDStorageCopyOne(virQEMUDriver *driver,
host, port, socket,
mirror_speed,
mirror_shallow,
tlsAlias);
tlsAlias,
syncWrites);
} else {
rc = qemuMigrationSrcNBDStorageCopyDriveMirror(driver, vm, diskAlias,
host, port, socket,
@ -2364,6 +2367,13 @@ qemuMigrationSrcBeginPhase(virQEMUDriver *driver,
}
if (flags & (VIR_MIGRATE_NON_SHARED_DISK | VIR_MIGRATE_NON_SHARED_INC)) {
if (flags & VIR_MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES &&
!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("VIR_MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES is not supported by this QEMU"));
return NULL;
}
if (flags & VIR_MIGRATE_TUNNELLED) {
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",

1
src/qemu/qemu_migration.h
View File

@ -59,6 +59,7 @@
VIR_MIGRATE_POSTCOPY | \
VIR_MIGRATE_TLS | \
VIR_MIGRATE_PARALLEL | \
VIR_MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES | \
0)
/* All supported migration parameters and their types. */