[PATCH v2 3/4] conf: introduce dirty_ring_size in struct "_virDomainDef"

From: Hyman Huang(黄勇) <huangy81(a)chinatelecom.cn&gt; introduce dirty_ring_size to hold the ring size configured by user, and pass dirty_ring_size when building qemu commandline if dirty ring feature enabled. Signed-off-by: Hyman Huang(黄勇) <huangy81(a)chinatelecom.cn&gt; --- src/conf/domain_conf.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++ src/conf/domain_conf.h | 4 +++ src/qemu/qemu_command.c | 3 ++ 3 files changed, 85 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index f65509d..09d2f95 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -204,6 +204,7 @@ VIR_ENUM_IMPL(virDomainKVM, "hidden", "hint-dedicated", "poll-control", + "dirty-ring", ); VIR_ENUM_IMPL(virDomainXen, @@ -4752,6 +4753,16 @@ virDomainDefPostParseMemtune(virDomainDef *def) } } +static void +virDomainDefPostParseFeatures(virDomainDef *def) +{ + if (def->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON && + def->kvm_features[VIR_DOMAIN_KVM_DIRTY_RING] == VIR_TRISTATE_SWITCH_ON && + def->dirty_ring_size == 0) { + /* set 4096 as default size if dirty ring size not congfigured */ + def->dirty_ring_size = 4096; + } +} static int virDomainDefAddConsoleCompat(virDomainDef *def) @@ -6003,6 +6014,8 @@ virDomainDefPostParseCommon(virDomainDef *def, virDomainDefPostParseMemtune(def); + virDomainDefPostParseFeatures(def); + if (virDomainDefRejectDuplicateControllers(def) < 0) return -1; @@ -17574,6 +17587,9 @@ virDomainFeaturesDefParse(virDomainDef *def, if (def->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON) { int feature; virTristateSwitch value; + xmlNodePtr node = NULL; + + node = ctxt->node; if ((n = virXPathNodeSet("./features/kvm/*", ctxt, &nodes)) < 0) return -1; @@ -17598,11 +17614,44 @@ virDomainFeaturesDefParse(virDomainDef *def, def->kvm_features[feature] = value; break; + case VIR_DOMAIN_KVM_DIRTY_RING: + if (virXMLPropTristateSwitch(nodes[i], "state", + VIR_XML_PROP_REQUIRED, + &value) < 0) + return -1; + + def->kvm_features[feature] = value; + + if (((virDomainKVM) feature) == VIR_DOMAIN_KVM_DIRTY_RING && + value == VIR_TRISTATE_SWITCH_ON) { + ctxt->node = nodes[i]; + + if (virXMLPropString(ctxt->node, "size")) { + if (virXPathUInt("string(./@size)", ctxt, + &def->dirty_ring_size) < 0) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("invalid number of dirty ring size")); + return -1; + } + + if ((def->dirty_ring_size & (def->dirty_ring_size - 1)) != 0 || + def->dirty_ring_size < 1024 || + def->dirty_ring_size > 65536) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("dirty ring must be power of 2 " + "and ranges [1024, 65536]")); + return -1; + } + } + } + break; + case VIR_DOMAIN_KVM_LAST: break; } } VIR_FREE(nodes); + ctxt->node = node; } if (def->features[VIR_DOMAIN_FEATURE_XEN] == VIR_TRISTATE_SWITCH_ON) { @@ -21636,7 +21685,27 @@ virDomainDefFeaturesCheckABIStability(virDomainDef *src, virTristateSwitchTypeToString(dst->kvm_features[i])); return false; } + break; + + case VIR_DOMAIN_KVM_DIRTY_RING: + if (src->kvm_features[i] != dst->kvm_features[i]) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("State of KVM feature '%s' differs: " + "source: '%s', destination: '%s'"), + virDomainKVMTypeToString(i), + virTristateSwitchTypeToString(src->kvm_features[i]), + virTristateSwitchTypeToString(dst->kvm_features[i])); + return false; + } + if (src->dirty_ring_size != dst->dirty_ring_size) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("dirty ring size of KVM feature '%s' differs: " + "source: '%d', destination: '%d'"), + virDomainKVMTypeToString(i), + src->dirty_ring_size, dst->dirty_ring_size); + return false; + } break; case VIR_DOMAIN_KVM_LAST: @@ -27614,6 +27683,15 @@ virDomainDefFormatFeatures(virBuffer *buf, def->kvm_features[j])); break; + case VIR_DOMAIN_KVM_DIRTY_RING: + if (def->kvm_features[j] != VIR_TRISTATE_SWITCH_ABSENT) { + virBufferAsprintf(&childBuf, "<%s state='%s' size='%d'/>\n", + virDomainKVMTypeToString(j), + virTristateSwitchTypeToString(def->kvm_features[j]), + def->dirty_ring_size); + } + break; + case VIR_DOMAIN_KVM_LAST: break; } diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index f706c49..a479b68 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2058,6 +2058,7 @@ typedef enum { VIR_DOMAIN_KVM_HIDDEN = 0, VIR_DOMAIN_KVM_DEDICATED, VIR_DOMAIN_KVM_POLLCONTROL, + VIR_DOMAIN_KVM_DIRTY_RING, VIR_DOMAIN_KVM_LAST } virDomainKVM; @@ -2882,6 +2883,9 @@ struct _virDomainDef { callbacks failed for a non-critical reason (was not able to fill in some data) and thus should be re-run before starting */ + + /* size of dirty ring for each vcpu */ + unsigned int dirty_ring_size; }; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 81fe67e..d1e9bee 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6587,6 +6587,9 @@ qemuBuildCpuCommandLine(virCommand *cmd, virBufferAddLit(&buf, ",kvm-poll-control=on"); break; + case VIR_DOMAIN_KVM_DIRTY_RING: + break; + case VIR_DOMAIN_KVM_LAST: break; } -- 1.8.3.1