[libvirt] [PATCH 2/4] qemu: migration: Drop @def from qemuMigrationIsAllowed
Peter Krempa
pkrempa at redhat.com
Tue Oct 6 15:14:04 UTC 2015
Now that qemuMigrationIsAllowed is always called with @vm, we can drop
the @def argument and simplify the control flow.
Additionally the comment is invalid so drop it.
---
src/qemu/qemu_driver.c | 8 ++---
src/qemu/qemu_migration.c | 87 +++++++++++++++++++++--------------------------
src/qemu/qemu_migration.h | 3 +-
3 files changed, 43 insertions(+), 55 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index aff1915..d3017d2 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3182,7 +3182,7 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver, virDomainPtr dom,
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
- if (!qemuMigrationIsAllowed(driver, vm, vm->def, false, false))
+ if (!qemuMigrationIsAllowed(driver, vm, false, false))
goto cleanup;
if (qemuDomainObjBeginAsyncJob(driver, vm, QEMU_ASYNC_JOB_SAVE) < 0)
@@ -3614,7 +3614,7 @@ doCoreDump(virQEMUDriverPtr driver,
goto cleanup;
}
- if (!qemuMigrationIsAllowed(driver, vm, vm->def, false, false))
+ if (!qemuMigrationIsAllowed(driver, vm, false, false))
goto cleanup;
ret = qemuMigrationToFile(driver, vm, fd, 0, path,
@@ -13688,7 +13688,7 @@ qemuDomainSnapshotCreateActiveInternal(virConnectPtr conn,
bool resume = false;
int ret = -1;
- if (!qemuMigrationIsAllowed(driver, vm, vm->def, false, false))
+ if (!qemuMigrationIsAllowed(driver, vm, false, false))
goto cleanup;
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
@@ -14503,7 +14503,7 @@ qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
/* do the memory snapshot if necessary */
if (memory) {
/* check if migration is possible */
- if (!qemuMigrationIsAllowed(driver, vm, vm->def, false, false))
+ if (!qemuMigrationIsAllowed(driver, vm, false, false))
goto cleanup;
/* allow the migration job to be cancelled or the domain to be paused */
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 8f28bd5..3279ab2 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2184,69 +2184,58 @@ qemuMigrationIsAllowedHostdev(const virDomainDef *def)
}
-/* Validate whether the domain is safe to migrate. If vm is NULL,
- * then this is being run in the v2 Prepare stage on the destination
- * (where we only have the target xml); if vm is provided, then this
- * is being run in either v2 Perform or v3 Begin (where we also have
- * access to all of the domain's metadata, such as whether it is
- * marked autodestroy or has snapshots). While it would be nice to
- * assume that checking on source is sufficient to prevent ever
- * talking to the destination in the first place, we are stuck with
- * the fact that older servers did not do checks on the source. */
bool
-qemuMigrationIsAllowed(virQEMUDriverPtr driver, virDomainObjPtr vm,
- virDomainDefPtr def, bool remote, bool abort_on_error)
+qemuMigrationIsAllowed(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ bool remote,
+ bool abort_on_error)
{
int nsnapshots;
int pauseReason;
size_t i;
- if (vm) {
- if (qemuProcessAutoDestroyActive(driver, vm)) {
+ if (qemuProcessAutoDestroyActive(driver, vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is marked for auto destroy"));
+ return false;
+ }
+
+ /* perform these checks only when migrating to remote hosts */
+ if (remote) {
+ nsnapshots = virDomainSnapshotObjListNum(vm->snapshots, NULL, 0);
+ if (nsnapshots < 0)
+ return false;
+
+ if (nsnapshots > 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
- "%s", _("domain is marked for auto destroy"));
+ _("cannot migrate domain with %d snapshots"),
+ nsnapshots);
return false;
}
- /* perform these checks only when migrating to remote hosts */
- if (remote) {
- nsnapshots = virDomainSnapshotObjListNum(vm->snapshots, NULL, 0);
- if (nsnapshots < 0)
- return false;
-
- if (nsnapshots > 0) {
- virReportError(VIR_ERR_OPERATION_INVALID,
- _("cannot migrate domain with %d snapshots"),
- nsnapshots);
- return false;
- }
-
- /* cancel migration if disk I/O error is emitted while migrating */
- if (abort_on_error &&
- virDomainObjGetState(vm, &pauseReason) == VIR_DOMAIN_PAUSED &&
- pauseReason == VIR_DOMAIN_PAUSED_IOERROR) {
- virReportError(VIR_ERR_OPERATION_INVALID, "%s",
- _("cannot migrate domain with I/O error"));
- return false;
- }
-
- }
-
- if (qemuDomainHasBlockjob(vm, false)) {
+ /* cancel migration if disk I/O error is emitted while migrating */
+ if (abort_on_error &&
+ virDomainObjGetState(vm, &pauseReason) == VIR_DOMAIN_PAUSED &&
+ pauseReason == VIR_DOMAIN_PAUSED_IOERROR) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
- _("domain has an active block job"));
+ _("cannot migrate domain with I/O error"));
return false;
}
- def = vm->def;
}
- if (!qemuMigrationIsAllowedHostdev(def))
+ if (qemuDomainHasBlockjob(vm, false)) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("domain has an active block job"));
+ return false;
+ }
+
+ if (!qemuMigrationIsAllowedHostdev(vm->def))
return false;
- if (def->cpu && def->cpu->mode != VIR_CPU_MODE_HOST_PASSTHROUGH) {
- for (i = 0; i < def->cpu->nfeatures; i++) {
- virCPUFeatureDefPtr feature = &def->cpu->features[i];
+ if (vm->def->cpu && vm->def->cpu->mode != VIR_CPU_MODE_HOST_PASSTHROUGH) {
+ for (i = 0; i < vm->def->cpu->nfeatures; i++) {
+ virCPUFeatureDefPtr feature = &vm->def->cpu->features[i];
if (feature->policy != VIR_CPU_FEATURE_REQUIRE)
continue;
@@ -2262,8 +2251,8 @@ qemuMigrationIsAllowed(virQEMUDriverPtr driver, virDomainObjPtr vm,
}
/* Verify that memory device config can be transferred reliably */
- for (i = 0; i < def->nmems; i++) {
- virDomainMemoryDefPtr mem = def->mems[i];
+ for (i = 0; i < vm->def->nmems; i++) {
+ virDomainMemoryDefPtr mem = vm->def->mems[i];
if (mem->model == VIR_DOMAIN_MEMORY_MODEL_DIMM &&
mem->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) {
@@ -2980,7 +2969,7 @@ qemuMigrationBeginPhase(virQEMUDriverPtr driver,
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT)
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_BEGIN3);
- if (!qemuMigrationIsAllowed(driver, vm, NULL, true, abort_on_error))
+ if (!qemuMigrationIsAllowed(driver, vm, true, abort_on_error))
goto cleanup;
if (!(flags & VIR_MIGRATE_UNSAFE) &&
@@ -5341,7 +5330,7 @@ qemuMigrationPerformJob(virQEMUDriverPtr driver,
goto endjob;
}
- if (!qemuMigrationIsAllowed(driver, vm, NULL, true, abort_on_error))
+ if (!qemuMigrationIsAllowed(driver, vm, true, abort_on_error))
goto endjob;
if (!(flags & VIR_MIGRATE_UNSAFE) &&
diff --git a/src/qemu/qemu_migration.h b/src/qemu/qemu_migration.h
index fa14274..54676df 100644
--- a/src/qemu/qemu_migration.h
+++ b/src/qemu/qemu_migration.h
@@ -174,8 +174,7 @@ int qemuMigrationConfirm(virConnectPtr conn,
int cancelled);
bool qemuMigrationIsAllowed(virQEMUDriverPtr driver, virDomainObjPtr vm,
- virDomainDefPtr def, bool remote,
- bool abort_on_error);
+ bool remote, bool abort_on_error);
int qemuMigrationToFile(virQEMUDriverPtr driver, virDomainObjPtr vm,
int fd, off_t offset, const char *path,
--
2.4.5
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