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This is an update (of an update :-) of Kyle Mestery's patch series v3 by the same name: https://www.redhat.com/archives/libvir-list/2012-October/msg00014.html I've updated it according to the comments in the review of patch 1/3 of that series: https://www.redhat.com/archives/libvir-list/2012-October/msg01224.html and also according to Michal and Eric's comments on v4: https://www.redhat.com/archives/libvir-list/2012-October/msg01227.html (interdiffs for those last changes are attached to patches 1/3 and 2/3) It now needs a counter-review from Kyle, along with verification that it actually works (since I don't have the proper setup to test it handy). ****************************************** This series of commits has the end goal of allowing per-port data stored in the Open vSwitch DB to be transported during live migration. This is done by first providing a generic infrastructure for transporting network data, adding some utility functions specific to Open vSwitch, and hooking the two together. The framework provided is generic in that other networking data could be transferred as well by simply adding in additional hooks as needed. Kyle Mestery (3): 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. Add utility functions for Open vSwitch to both save per-port data before a live migration, and restore the per-port data after a live migration. Transport Open vSwitch per-port data during live migration by using the utility functions virNetDevOpenvswitchGetMigrateData() and virNetDevOpenvswitchSetMigrateData(). **************************************************************** interdiff for PATCH 1/3: * remove extra {} in one place, add them in a couple others (I like braces when the condition is multi-line too). * don't emit <network> element at all if all the vporttypes are NONE * fix position of [i] in comment diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 67276f0..7219e78 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -184,9 +184,8 @@ static void qemuMigrationCookieFree(qemuMigrationCookiePtr mig) if (mig->flags & QEMU_MIGRATION_COOKIE_GRAPHICS) qemuMigrationCookieGraphicsFree(mig->graphics); - if (mig->flags & QEMU_MIGRATION_COOKIE_NETWORK) { + if (mig->flags & QEMU_MIGRATION_COOKIE_NETWORK) qemuMigrationCookieNetworkFree(mig->network); - } VIR_FREE(mig->localHostname); VIR_FREE(mig->remoteHostname); @@ -506,11 +505,15 @@ qemuMigrationCookieNetworkXMLFormat(virBufferPtr buf, qemuMigrationCookieNetworkPtr optr) { int i; + bool empty = true; - 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].vporttype is not set, there is nothing to transfer */ if (optr->net[i].vporttype != VIR_NETDEV_VPORT_PROFILE_NONE) { + if (empty) { + virBufferAsprintf(buf, " <network>\n"); + empty = false; + } virBufferAsprintf(buf, " <interface index='%d' vporttype='%s'", i, virNetDevVPortTypeToString(optr->net[i].vporttype)); if (optr->net[i].portdata) { @@ -523,7 +526,8 @@ qemuMigrationCookieNetworkXMLFormat(virBufferPtr buf, } } } - virBufferAddLit(buf, " </network>\n"); + if (!empty) + virBufferAddLit(buf, " </network>\n"); } @@ -921,8 +925,9 @@ qemuMigrationBakeCookie(qemuMigrationCookiePtr mig, return -1; if (flags & QEMU_MIGRATION_COOKIE_NETWORK && - qemuMigrationCookieAddNetwork(mig, driver, dom) < 0) + qemuMigrationCookieAddNetwork(mig, driver, dom) < 0) { return -1; + } if (!(*cookieout = qemuMigrationCookieXMLFormatStr(driver, mig))) return -1; @@ -2258,8 +2263,9 @@ cleanup: if (ret == 0 && qemuMigrationBakeCookie(mig, driver, vm, cookieout, cookieoutlen, QEMU_MIGRATION_COOKIE_PERSISTENT | - QEMU_MIGRATION_COOKIE_NETWORK) < 0) + QEMU_MIGRATION_COOKIE_NETWORK) < 0) { VIR_WARN("Unable to encode migration cookie"); + } qemuMigrationCookieFree(mig); *************************************************************************** interdiff for patch 2/3: * fix bad indentation I coincidentally just noticed at end of abutting function * use "cleanup" label instead of error, and default ret = -1 to be consistent. * use virCommandAddArgFormat instead of virBufferAsprintf. diff --git a/src/util/virnetdevopenvswitch.c b/src/util/virnetdevopenvswitch.c index 841f693..5bce611 100644 --- a/src/util/virnetdevopenvswitch.c +++ b/src/util/virnetdevopenvswitch.c @@ -173,11 +173,11 @@ int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const ch _("Unable to delete port %s from OVS"), ifname); goto cleanup; } - ret = 0; - cleanup: - virCommandFree(cmd); - return ret; + ret = 0; +cleanup: + virCommandFree(cmd); + return ret; } /** @@ -192,7 +192,7 @@ int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const ch int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname) { virCommandPtr cmd = NULL; - int ret = 0; + int ret = -1; cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "get", "Interface", ifname, "external_ids:PortData", NULL); @@ -204,14 +204,13 @@ int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname) virReportSystemError(VIR_ERR_INTERNAL_ERROR, _("Unable to run command to get OVS port data for " "interface %s"), ifname); - ret = -1; - goto error; + goto cleanup; } /* Wipeout the newline */ (*migrate)[strlen(*migrate) - 1] = '\0'; - -error: + ret = 0; +cleanup: return ret; } @@ -227,25 +226,21 @@ error: int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname) { virCommandPtr cmd = NULL; - int ret = 0; - virBufferPtr buf; - - if (VIR_ALLOC(buf) < 0) { - ret = -1; - goto error; - } + int ret = -1; - virBufferAsprintf(buf, "external_ids:PortData=%s", migrate); + cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set", + "Interface", ifname, NULL); + virCommandAddArgFormat(cmd, "external_ids:PortData=%s", migrate); - cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set", "Interface", ifname, - virBufferCurrentContent(buf), NULL); /* Run the command */ - if ((ret = virCommandRun(cmd, NULL)) < 0) { + if (virCommandRun(cmd, NULL) < 0) { virReportSystemError(VIR_ERR_INTERNAL_ERROR, _("Unable to run command to set OVS port data for " "interface %s"), ifname); + goto cleanup; } -error: + ret = 0; +cleanup: return ret; } -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list