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From b020ddee84458afd8de70d9f296b91fa2b6a95fd Mon Sep 17 00:00:00 2001
Message-Id: <b020ddee84458afd8de70d9f296b91fa2b6a95fd@dist-git>
From: Peter Krempa <pkrempa@redhat.com>
Date: Fri, 15 Jul 2022 14:16:54 +0200
Subject: [PATCH] qemu: Always assume support for
QEMU_CAPS_MIGRATION_PARAM_XBZRLE_CACHE_SIZE
The 'xbzrle-cache-size' parameter was added in qemu-2.11 thus all
supported qemu versions now use the new code path.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 06e0ba3da71ec6c58024efe57d0f55d3d1352d60)
This commit is not strictly needed for fixing the following BZ, but it
removes a code which will be never executed in RHEL 9 and backporting it
avoids conflicts with the actual bug fix.
https://bugzilla.redhat.com/show_bug.cgi?id=2107892
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
src/qemu/qemu_driver.c | 56 +++++++++-----------------------
src/qemu/qemu_migration_params.c | 18 ----------
2 files changed, 16 insertions(+), 58 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 17e4c23199..256e126ae1 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -13172,10 +13172,8 @@ qemuDomainMigrateGetCompressionCache(virDomainPtr dom,
{
virQEMUDriver *driver = dom->conn->privateData;
virDomainObj *vm;
- qemuDomainObjPrivate *priv;
g_autoptr(qemuMigrationParams) migParams = NULL;
int ret = -1;
- int rc;
virCheckFlags(0, -1);
@@ -13191,8 +13189,6 @@ qemuDomainMigrateGetCompressionCache(virDomainPtr dom,
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
- priv = vm->privateData;
-
if (!qemuMigrationCapsGet(vm, QEMU_MIGRATION_CAP_XBZRLE)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Compressed migration is not supported by "
@@ -13200,22 +13196,14 @@ qemuDomainMigrateGetCompressionCache(virDomainPtr dom,
goto endjob;
}
- if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATION_PARAM_XBZRLE_CACHE_SIZE)) {
- if (qemuMigrationParamsFetch(driver, vm, VIR_ASYNC_JOB_NONE,
- &migParams) < 0)
- goto endjob;
+ if (qemuMigrationParamsFetch(driver, vm, VIR_ASYNC_JOB_NONE,
+ &migParams) < 0)
+ goto endjob;
- if (qemuMigrationParamsGetULL(migParams,
- QEMU_MIGRATION_PARAM_XBZRLE_CACHE_SIZE,
- cacheSize) < 0)
- goto endjob;
- } else {
- qemuDomainObjEnterMonitor(driver, vm);
- rc = qemuMonitorGetMigrationCacheSize(priv->mon, cacheSize);
- qemuDomainObjExitMonitor(vm);
- if (rc < 0)
- goto endjob;
- }
+ if (qemuMigrationParamsGetULL(migParams,
+ QEMU_MIGRATION_PARAM_XBZRLE_CACHE_SIZE,
+ cacheSize) < 0)
+ goto endjob;
ret = 0;
@@ -13234,10 +13222,8 @@ qemuDomainMigrateSetCompressionCache(virDomainPtr dom,
{
virQEMUDriver *driver = dom->conn->privateData;
virDomainObj *vm;
- qemuDomainObjPrivate *priv;
g_autoptr(qemuMigrationParams) migParams = NULL;
int ret = -1;
- int rc;
virCheckFlags(0, -1);
@@ -13253,8 +13239,6 @@ qemuDomainMigrateSetCompressionCache(virDomainPtr dom,
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
- priv = vm->privateData;
-
if (!qemuMigrationCapsGet(vm, QEMU_MIGRATION_CAP_XBZRLE)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Compressed migration is not supported by "
@@ -13263,25 +13247,17 @@ qemuDomainMigrateSetCompressionCache(virDomainPtr dom,
}
VIR_DEBUG("Setting compression cache to %llu B", cacheSize);
- if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATION_PARAM_XBZRLE_CACHE_SIZE)) {
- if (!(migParams = qemuMigrationParamsNew()))
- goto endjob;
+ if (!(migParams = qemuMigrationParamsNew()))
+ goto endjob;
- if (qemuMigrationParamsSetULL(migParams,
- QEMU_MIGRATION_PARAM_XBZRLE_CACHE_SIZE,
- cacheSize) < 0)
- goto endjob;
+ if (qemuMigrationParamsSetULL(migParams,
+ QEMU_MIGRATION_PARAM_XBZRLE_CACHE_SIZE,
+ cacheSize) < 0)
+ goto endjob;
- if (qemuMigrationParamsApply(driver, vm, VIR_ASYNC_JOB_NONE,
- migParams, 0) < 0)
- goto endjob;
- } else {
- qemuDomainObjEnterMonitor(driver, vm);
- rc = qemuMonitorSetMigrationCacheSize(priv->mon, cacheSize);
- qemuDomainObjExitMonitor(vm);
- if (rc < 0)
- goto endjob;
- }
+ if (qemuMigrationParamsApply(driver, vm, VIR_ASYNC_JOB_NONE,
+ migParams, 0) < 0)
+ goto endjob;
ret = 0;
diff --git a/src/qemu/qemu_migration_params.c b/src/qemu/qemu_migration_params.c
index 6ea0bde13a..0bce358ac3 100644
--- a/src/qemu/qemu_migration_params.c
+++ b/src/qemu/qemu_migration_params.c
@@ -886,10 +886,8 @@ qemuMigrationParamsApply(virQEMUDriver *driver,
unsigned long apiFlags)
{
qemuDomainObjPrivate *priv = vm->privateData;
- bool xbzrleCacheSize_old = false;
g_autoptr(virJSONValue) params = NULL;
g_autoptr(virJSONValue) caps = NULL;
- qemuMigrationParam xbzrle = QEMU_MIGRATION_PARAM_XBZRLE_CACHE_SIZE;
bool postcopyResume = !!(apiFlags & VIR_MIGRATE_POSTCOPY_RESUME);
int ret = -1;
@@ -917,19 +915,6 @@ qemuMigrationParamsApply(virQEMUDriver *driver,
}
}
- /* If QEMU is too old to support xbzrle-cache-size migration parameter,
- * we need to set it via migrate-set-cache-size and tell
- * qemuMonitorSetMigrationParams to ignore this parameter.
- */
- if (migParams->params[xbzrle].set &&
- !virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATION_PARAM_XBZRLE_CACHE_SIZE)) {
- if (qemuMonitorSetMigrationCacheSize(priv->mon,
- migParams->params[xbzrle].value.ull) < 0)
- goto cleanup;
- xbzrleCacheSize_old = true;
- migParams->params[xbzrle].set = false;
- }
-
if (!(params = qemuMigrationParamsToJSON(migParams, postcopyResume)))
goto cleanup;
@@ -942,9 +927,6 @@ qemuMigrationParamsApply(virQEMUDriver *driver,
cleanup:
qemuDomainObjExitMonitor(vm);
- if (xbzrleCacheSize_old)
- migParams->params[xbzrle].set = true;
-
return ret;
}
--
2.35.1
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