[libvirt] [PATCH 1/3] qemu_migration: Add hooks to transport network data during migration
Kyle Mestery
kmestery at cisco.com
Mon Oct 1 15:18:20 UTC 2012
Add the ability for the Qemu V3 migration protocol to
include transporting network configuration. A generic
framework is proposed with this patch to allow for the
transfer of opaque data.
Signed-off-by: Kyle Mestery <kmestery at cisco.com>
---
src/qemu/qemu_migration.c | 246 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 244 insertions(+), 2 deletions(-)
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index db69a0a..a17ccbd 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -70,6 +70,7 @@ enum qemuMigrationCookieFlags {
QEMU_MIGRATION_COOKIE_FLAG_GRAPHICS,
QEMU_MIGRATION_COOKIE_FLAG_LOCKSTATE,
QEMU_MIGRATION_COOKIE_FLAG_PERSISTENT,
+ QEMU_MIGRATION_COOKIE_FLAG_NETWORK,
QEMU_MIGRATION_COOKIE_FLAG_LAST
};
@@ -77,12 +78,13 @@ enum qemuMigrationCookieFlags {
VIR_ENUM_DECL(qemuMigrationCookieFlag);
VIR_ENUM_IMPL(qemuMigrationCookieFlag,
QEMU_MIGRATION_COOKIE_FLAG_LAST,
- "graphics", "lockstate", "persistent");
+ "graphics", "lockstate", "persistent", "network");
enum qemuMigrationCookieFeatures {
QEMU_MIGRATION_COOKIE_GRAPHICS = (1 << QEMU_MIGRATION_COOKIE_FLAG_GRAPHICS),
QEMU_MIGRATION_COOKIE_LOCKSTATE = (1 << QEMU_MIGRATION_COOKIE_FLAG_LOCKSTATE),
QEMU_MIGRATION_COOKIE_PERSISTENT = (1 << QEMU_MIGRATION_COOKIE_FLAG_PERSISTENT),
+ QEMU_MIGRATION_COOKIE_NETWORK = (1 << QEMU_MIGRATION_COOKIE_FLAG_NETWORK),
};
typedef struct _qemuMigrationCookieGraphics qemuMigrationCookieGraphics;
@@ -95,6 +97,27 @@ struct _qemuMigrationCookieGraphics {
char *tlsSubject;
};
+typedef struct _qemuMigrationCookieNetdata qemuMigrationCookieNetdata;
+typedef qemuMigrationCookieNetdata *qemuMigrationCookieNetdataPtr;
+struct _qemuMigrationCookieNetdata {
+ int vporttype; /* enum virNetDevVPortProfile */
+
+ /*
+ * Array of pointers to saved data. Each VIF will have it's own
+ * data to transfer.
+ */
+ char *portdata;
+};
+
+typedef struct _qemuMigrationCookieNetwork qemuMigrationCookieNetwork;
+typedef qemuMigrationCookieNetwork *qemuMigrationCookieNetworkPtr;
+struct _qemuMigrationCookieNetwork {
+ /* How many virtual NICs are we saving data for? */
+ int nnets;
+
+ qemuMigrationCookieNetdataPtr *net;
+};
+
typedef struct _qemuMigrationCookie qemuMigrationCookie;
typedef qemuMigrationCookie *qemuMigrationCookiePtr;
struct _qemuMigrationCookie {
@@ -120,6 +143,9 @@ struct _qemuMigrationCookie {
/* If (flags & QEMU_MIGRATION_COOKIE_PERSISTENT) */
virDomainDefPtr persistent;
+
+ /* If (flags & QEMU_MIGRATION_COOKIE_NETWORK) */
+ qemuMigrationCookieNetworkPtr network;
};
static void qemuMigrationCookieGraphicsFree(qemuMigrationCookieGraphicsPtr grap)
@@ -132,6 +158,25 @@ static void qemuMigrationCookieGraphicsFree(qemuMigrationCookieGraphicsPtr grap)
}
+static void qemuMigrationCookieNetworkFree(qemuMigrationCookieNetworkPtr
+ network)
+{
+ int i;
+
+ if (!network)
+ return;
+
+ for (i = 0; i < network->nnets; i++) {
+ if (network->net[i]) {
+ VIR_FREE(network->net[i]->portdata);
+ VIR_FREE(network->net[i]);
+ }
+ }
+ VIR_FREE(network->net);
+ VIR_FREE(network);
+}
+
+
static void qemuMigrationCookieFree(qemuMigrationCookiePtr mig)
{
if (!mig)
@@ -140,6 +185,10 @@ static void qemuMigrationCookieFree(qemuMigrationCookiePtr mig)
if (mig->flags & QEMU_MIGRATION_COOKIE_GRAPHICS)
qemuMigrationCookieGraphicsFree(mig->graphics);
+ if (mig->flags & QEMU_MIGRATION_COOKIE_NETWORK) {
+ qemuMigrationCookieNetworkFree(mig->network);
+ }
+
VIR_FREE(mig->localHostname);
VIR_FREE(mig->remoteHostname);
VIR_FREE(mig->name);
@@ -256,6 +305,57 @@ error:
}
+static qemuMigrationCookieNetworkPtr
+qemuMigrationCookieNetworkAlloc(struct qemud_driver *driver ATTRIBUTE_UNUSED,
+ virDomainDefPtr def)
+{
+ qemuMigrationCookieNetworkPtr mig;
+ int i;
+ virDomainNetDefPtr netptr ATTRIBUTE_UNUSED;
+
+ if (VIR_ALLOC(mig) < 0)
+ goto no_memory;
+
+ mig->nnets = def->nnets;
+
+ if (VIR_ALLOC_N(mig->net, def->nnets) <0)
+ goto no_memory;
+
+ for (i = 0; i < def->nnets; i++) {
+ virNetDevVPortProfilePtr vport = virDomainNetGetActualVirtPortProfile(def->nets[i]);
+ netptr = def->nets[i];
+
+ if (vport) {
+ if (VIR_ALLOC(mig->net[i]) < 0)
+ goto no_memory;
+
+ mig->net[i]->vporttype = vport->virtPortType;
+
+ switch (vport->virtPortType) {
+ case VIR_NETDEV_VPORT_PROFILE_NONE:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_8021QBG:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_8021QBH:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH:
+ break;
+ default:
+ mig->net[i]->portdata = NULL;
+ break;
+ }
+ }
+ }
+
+ return mig;
+
+no_memory:
+ virReportOOMError();
+ qemuMigrationCookieNetworkFree(mig);
+ return NULL;
+}
+
+
static qemuMigrationCookiePtr
qemuMigrationCookieNew(virDomainObjPtr dom)
{
@@ -370,6 +470,27 @@ qemuMigrationCookieAddPersistent(qemuMigrationCookiePtr mig,
}
+static int
+qemuMigrationCookieAddNetwork(qemuMigrationCookiePtr mig,
+ struct qemud_driver *driver,
+ virDomainObjPtr dom)
+{
+ if (mig->flags & QEMU_MIGRATION_COOKIE_NETWORK) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Network migration data already present"));
+ return -1;
+ }
+
+ if (dom->def->nnets > 0) {
+ if (!(mig->network = qemuMigrationCookieNetworkAlloc(
+ driver, dom->def)))
+ return -1;
+ mig->flags |= QEMU_MIGRATION_COOKIE_NETWORK;
+ }
+
+ return 0;
+}
+
static void qemuMigrationCookieGraphicsXMLFormat(virBufferPtr buf,
qemuMigrationCookieGraphicsPtr grap)
@@ -389,6 +510,27 @@ static void qemuMigrationCookieGraphicsXMLFormat(virBufferPtr buf,
}
+static void qemuMigrationCookieNetworkXMLFormat(virBufferPtr buf,
+ qemuMigrationCookieNetworkPtr optr)
+{
+ int i;
+
+ virBufferAsprintf(buf, " <network>\n");
+ for (i = 0; i < optr->nnets; i++) {
+ /* If optr->net->vporttype[i] is not set, there is nothing to transfer */
+ if (optr->net[i] && optr->net[i]->vporttype != VIR_NETDEV_VPORT_PROFILE_NONE) {
+ virBufferAsprintf(buf, " <interface index='%d' vporttype='%s'",
+ i, virNetDevVPortTypeToString(optr->net[i]->vporttype));
+ if (optr->net[i]->portdata)
+ virBufferAsprintf(buf, " portdata='%s'", optr->net[i]->portdata);
+ virBufferAddLit(buf, "/>\n");
+ }
+ }
+
+ virBufferAddLit(buf, " </network>\n");
+}
+
+
static int
qemuMigrationCookieXMLFormat(struct qemud_driver *driver,
virBufferPtr buf,
@@ -439,6 +581,9 @@ qemuMigrationCookieXMLFormat(struct qemud_driver *driver,
virBufferAdjustIndent(buf, -2);
}
+ if ((mig->flags & QEMU_MIGRATION_COOKIE_NETWORK) && mig->network)
+ qemuMigrationCookieNetworkXMLFormat(buf, mig->network);
+
virBufferAddLit(buf, "</qemu-migration>\n");
return 0;
}
@@ -516,6 +661,58 @@ error:
}
+static qemuMigrationCookieNetworkPtr
+qemuMigrationCookieNetworkXMLParse(xmlXPathContextPtr ctxt)
+{
+ qemuMigrationCookieNetworkPtr optr;
+ int i;
+ int n;
+ xmlNodePtr *interfaces = NULL;
+ char *vporttype;
+
+ if (VIR_ALLOC(optr) < 0)
+ goto no_memory;
+
+ if ((n = virXPathNodeSet("./network/interface", ctxt, &interfaces)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("missing interace information"));
+ goto error;
+ }
+
+ optr->nnets = n;
+ if (VIR_ALLOC_N(optr->net, optr->nnets) <0)
+ goto no_memory;
+
+ for (i = 0; i < n; i++) {
+ if (VIR_ALLOC(optr->net[i]) < 0)
+ goto no_memory;
+ if (VIR_ALLOC(optr->net[i]->portdata) < 0)
+ goto no_memory;
+
+ /* portdata is optional, and may not exist */
+ optr->net[i]->portdata = virXMLPropString(interfaces[i], "portdata");
+
+ if (!(vporttype = virXMLPropString(interfaces[i], "vporttype"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("missing vporttype attribute in migration data"));
+ goto error;
+ }
+ optr->net[i]->vporttype = virNetDevVPortTypeFromString(vporttype);
+ }
+
+ VIR_FREE(interfaces);
+
+ return optr;
+
+no_memory:
+ virReportOOMError();
+error:
+ VIR_FREE(interfaces);
+ qemuMigrationCookieNetworkFree(optr);
+ return NULL;
+}
+
+
static int
qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig,
struct qemud_driver *driver,
@@ -662,6 +859,11 @@ qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig,
VIR_FREE(nodes);
}
+ if ((flags & QEMU_MIGRATION_COOKIE_NETWORK) &&
+ virXPathBoolean("count(./network) > 0", ctxt) &&
+ (!(mig->network = qemuMigrationCookieNetworkXMLParse(ctxt))))
+ goto error;
+
return 0;
error:
@@ -721,6 +923,10 @@ qemuMigrationBakeCookie(qemuMigrationCookiePtr mig,
qemuMigrationCookieAddPersistent(mig, dom) < 0)
return -1;
+ if (flags & QEMU_MIGRATION_COOKIE_NETWORK &&
+ qemuMigrationCookieAddNetwork(mig, driver, dom) < 0)
+ return -1;
+
if (!(*cookieout = qemuMigrationCookieXMLFormatStr(driver, mig)))
return -1;
@@ -1067,6 +1273,36 @@ qemuDomainMigrateGraphicsRelocate(struct qemud_driver *driver,
}
+static int
+qemuDomainMigrateOPDRelocate(struct qemud_driver *driver ATTRIBUTE_UNUSED,
+ virDomainObjPtr vm,
+ qemuMigrationCookiePtr cookie)
+{
+ virDomainNetDefPtr netptr ATTRIBUTE_UNUSED;
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < cookie->network->nnets; i++) {
+ netptr = vm->def->nets[i];
+
+ switch (cookie->network->net[i]->vporttype) {
+ case VIR_NETDEV_VPORT_PROFILE_NONE:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_8021QBG:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_8021QBH:
+ break;
+ case VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH:
+ break;
+ default:
+ break;
+ }
+ }
+
+ return ret;
+}
+
+
/* This is called for outgoing non-p2p migrations when a connection to the
* client which initiated the migration was closed but we were waiting for it
* to follow up with the next phase, that is, in between
@@ -2011,7 +2247,8 @@ cleanup:
if (ret == 0 &&
qemuMigrationBakeCookie(mig, driver, vm, cookieout, cookieoutlen,
- QEMU_MIGRATION_COOKIE_PERSISTENT ) < 0)
+ QEMU_MIGRATION_COOKIE_PERSISTENT |
+ QEMU_MIGRATION_COOKIE_NETWORK) < 0)
VIR_WARN("Unable to encode migration cookie");
qemuMigrationCookieFree(mig);
@@ -2946,6 +3183,7 @@ qemuMigrationFinish(struct qemud_driver *driver,
qemuDomainCleanupRemove(vm, qemuMigrationPrepareCleanup);
+ cookie_flags = QEMU_MIGRATION_COOKIE_NETWORK;
if (flags & VIR_MIGRATE_PERSIST_DEST)
cookie_flags |= QEMU_MIGRATION_COOKIE_PERSISTENT;
@@ -2973,6 +3211,10 @@ qemuMigrationFinish(struct qemud_driver *driver,
goto endjob;
}
+ if (mig->network)
+ if (qemuDomainMigrateOPDRelocate(driver, vm, mig) < 0)
+ VIR_WARN("unable to provide network data for relocation");
+
if (flags & VIR_MIGRATE_PERSIST_DEST) {
virDomainDefPtr vmdef;
if (vm->persistent)
--
1.7.11.4
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