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[libvirt] [PATCH] 802.1Qbg: use pre-associate state at beginning of incoming migration
by Stefan Berger 24 Nov '10

24 Nov '10

This patch introduces the usage of the pre-associate state of the IEEE 802.1Qbg standard on incoming VM migration on the target host. It is in response to bugzilla entry 632750. https://bugzilla.redhat.com/show_bug.cgi?id=632750 For being able to differentiate the exact reason as to why a macvtap device is being created, either due to a VM creation or an incoming VM migration, I needed to pass that reason as a parameter from wherever qemudStartVMDaemon is being called in order to determine whether to send an ASSOCIATE (VM creation) or a PRE-ASSOCIATE (incoming VM migration) towards lldpad. I am also fixing problem with the virsh domainxml-to-native call on the way. Gerhard successfully tested the patch with a recent blade network 802.1Qbg-compliant switch. The patch should not have any side-effects on the 802.1Qbh support in libvirt, but Scott (cc'ed) may want to verify this. Signed-off-by: Stefan Berger <stefanb(a)us.ibm.com> Signed-off-by: Gerhard Stenzel <gerhard.stenzel(a)de.ibm.com> --- src/libvirt_macvtap.syms | 2 + src/qemu/qemu_conf.c | 12 +++++-- src/qemu/qemu_conf.h | 7 +++- src/qemu/qemu_driver.c | 72 +++++++++++++++++++++++++++++++++++++---------- src/util/macvtap.c | 54 ++++++++++++++++++++++++++++++----- src/util/macvtap.h | 20 +++++++++++-- 6 files changed, 137 insertions(+), 30 deletions(-) Index: libvirt-acl/src/qemu/qemu_conf.c =================================================================== --- libvirt-acl.orig/src/qemu/qemu_conf.c +++ libvirt-acl/src/qemu/qemu_conf.c @@ -1640,7 +1640,8 @@ qemudPhysIfaceConnect(virConnectPtr conn struct qemud_driver *driver, virDomainNetDefPtr net, unsigned long long qemuCmdFlags, - const unsigned char *vmuuid) + const unsigned char *vmuuid, + enum vmOperation vmop) { int rc; #if WITH_MACVTAP @@ -1654,7 +1655,8 @@ qemudPhysIfaceConnect(virConnectPtr conn rc = openMacvtapTap(net->ifname, net->mac, net->data.direct.linkdev, net->data.direct.mode, vnet_hdr, vmuuid, -&net->data.direct.virtPortProfile,&res_ifname); +&net->data.direct.virtPortProfile,&res_ifname, + vmop); if (rc>= 0) { VIR_FREE(net->ifname); net->ifname = res_ifname; @@ -3951,7 +3953,8 @@ int qemudBuildCommandLine(virConnectPtr int **vmfds, int *nvmfds, const char *migrateFrom, - virDomainSnapshotObjPtr current_snapshot) + virDomainSnapshotObjPtr current_snapshot, + enum vmOperation vmop) { int i; char memory[50]; @@ -4794,7 +4797,8 @@ int qemudBuildCommandLine(virConnectPtr } else if (net->type == VIR_DOMAIN_NET_TYPE_DIRECT) { int tapfd = qemudPhysIfaceConnect(conn, driver, net, qemuCmdFlags, - def->uuid); + def->uuid, + vmop); if (tapfd< 0) goto error; Index: libvirt-acl/src/qemu/qemu_conf.h =================================================================== --- libvirt-acl.orig/src/qemu/qemu_conf.h +++ libvirt-acl/src/qemu/qemu_conf.h @@ -40,6 +40,7 @@ # include "cpu_conf.h" # include "driver.h" # include "bitmap.h" +# include "macvtap.h" # define qemudDebug(fmt, ...) do {} while(0) @@ -238,7 +239,8 @@ int qemudBuildCommandLine int **vmfds, int *nvmfds, const char *migrateFrom, - virDomainSnapshotObjPtr current_snapshot) + virDomainSnapshotObjPtr current_snapshot, + enum vmOperation vmop) ATTRIBUTE_NONNULL(1); /* With vlan == -1, use netdev syntax, else old hostnet */ @@ -317,7 +319,8 @@ int qemudPhysIfaceConnect(virConnectPtr struct qemud_driver *driver, virDomainNetDefPtr net, unsigned long long qemuCmdFlags, - const unsigned char *vmuuid); + const unsigned char *vmuuid, + enum vmOperation vmop); int qemudProbeMachineTypes (const char *binary, virCapsGuestMachinePtr **machines, Index: libvirt-acl/src/qemu/qemu_driver.c =================================================================== --- libvirt-acl.orig/src/qemu/qemu_driver.c +++ libvirt-acl/src/qemu/qemu_driver.c @@ -163,7 +163,8 @@ static int qemudStartVMDaemon(virConnect const char *migrateFrom, bool start_paused, int stdin_fd, - const char *stdin_path); + const char *stdin_path, + enum vmOperation vmop); static void qemudShutdownVMDaemon(struct qemud_driver *driver, virDomainObjPtr vm, @@ -3864,7 +3865,8 @@ static int qemudStartVMDaemon(virConnect const char *migrateFrom, bool start_paused, int stdin_fd, - const char *stdin_path) { + const char *stdin_path, + enum vmOperation vmop) { const char **argv = NULL, **tmp; const char **progenv = NULL; int i, ret, runflags; @@ -4065,7 +4067,7 @@ static int qemudStartVMDaemon(virConnect if (qemudBuildCommandLine(conn, driver, vm->def, priv->monConfig, priv->monJSON, qemuCmdFlags,&argv,&progenv, &vmfds,&nvmfds, migrateFrom, - vm->current_snapshot)< 0) + vm->current_snapshot, vmop)< 0) goto cleanup; if (qemuDomainSnapshotSetInactive(vm, driver->snapshotDir)< 0) @@ -4854,7 +4856,7 @@ static virDomainPtr qemudDomainCreate(vi if (qemudStartVMDaemon(conn, driver, vm, NULL, (flags& VIR_DOMAIN_START_PAUSED) != 0, - -1, NULL)< 0) { + -1, NULL, VM_OP_CREATE)< 0) { qemuDomainStartAudit(vm, "booted", false); if (qemuDomainObjEndJob(vm)> 0) virDomainRemoveInactive(&driver->domains, @@ -6997,7 +6999,8 @@ qemudDomainSaveImageStartVM(virConnectPt } /* Set the migration source and start it up. */ - ret = qemudStartVMDaemon(conn, driver, vm, "stdio", true, fd, path); + ret = qemudStartVMDaemon(conn, driver, vm, "stdio", true, fd, path, + VM_OP_RESTORE); if (intermediate_pid != -1) { /* Wait for intermediate process to exit */ @@ -7316,14 +7319,15 @@ static char *qemuDomainXMLToNative(virCo if (!def) goto cleanup; - /* Since we're just exporting args, we can't do bridge/network - * setups, since libvirt will normally create TAP devices + /* Since we're just exporting args, we can't do bridge/network/direct + * setups, since libvirt will normally create TAP/macvtap devices * directly. We convert those configs into generic 'ethernet' * config and assume the user has suitable 'ifup-qemu' scripts */ for (i = 0 ; i< def->nnets ; i++) { virDomainNetDefPtr net = def->nets[i]; - if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) { + if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK || + net->type == VIR_DOMAIN_NET_TYPE_DIRECT) { VIR_FREE(net->data.network.name); memset(net, 0, sizeof *net); @@ -7379,7 +7383,8 @@ static char *qemuDomainXMLToNative(virCo &monConfig, 0, qemuCmdFlags, &retargv,&retenv, NULL, NULL, /* Don't want it to create TAP devices */ - NULL, NULL)< 0) { + NULL, NULL, + VM_OP_NO_OP)< 0) { goto cleanup; } @@ -7466,7 +7471,8 @@ static int qemudDomainObjStart(virConnec goto cleanup; } - ret = qemudStartVMDaemon(conn, driver, vm, NULL, start_paused, -1, NULL); + ret = qemudStartVMDaemon(conn, driver, vm, NULL, start_paused, -1, NULL, + VM_OP_CREATE); qemuDomainStartAudit(vm, "booted", ret>= 0); if (ret>= 0) { virDomainEventPtr event = @@ -8309,7 +8315,8 @@ static int qemudDomainAttachNetDevice(vi if ((tapfd = qemudPhysIfaceConnect(conn, driver, net, qemuCmdFlags, - vm->def->uuid))< 0) + vm->def->uuid, + VM_OP_CREATE))< 0) return -1; } @@ -10983,7 +10990,7 @@ qemudDomainMigratePrepareTunnel(virConne * -incoming unix:/path/to/file or exec:nc -U /path/to/file */ internalret = qemudStartVMDaemon(dconn, driver, vm, migrateFrom, true, - -1, NULL); + -1, NULL, VM_OP_MIGRATE_IN_START); VIR_FREE(migrateFrom); if (internalret< 0) { qemuDomainStartAudit(vm, "migrated", false); @@ -11229,7 +11236,7 @@ qemudDomainMigratePrepare2 (virConnectPt */ snprintf (migrateFrom, sizeof (migrateFrom), "tcp:0.0.0.0:%d", this_port); if (qemudStartVMDaemon (dconn, driver, vm, migrateFrom, true, - -1, NULL)< 0) { + -1, NULL, VM_OP_MIGRATE_IN_START)< 0) { qemuDomainStartAudit(vm, "migrated", false); /* Note that we don't set an error here because qemudStartVMDaemon * should have already done that. @@ -11844,6 +11851,41 @@ cleanup: return ret; } +static void +qemudVPAssociatePortProfiles(virDomainDefPtr def) { + int i; + int last_good_net = -1; + virDomainNetDefPtr net; + + for (i = 0; i< def->nnets; i++) { + net = def->nets[i]; + if (net->type == VIR_DOMAIN_NET_TYPE_DIRECT) { + if (vpAssociatePortProfileId(net->ifname, + net->mac, + net->data.direct.linkdev, +&net->data.direct.virtPortProfile, + def->uuid, + VM_OP_MIGRATE_IN_FINISH) != 0) + goto err_exit; + } + last_good_net = i; + } + + return; + +err_exit: + for (i = 0; i< last_good_net; i++) { + net = def->nets[i]; + if (net->type == VIR_DOMAIN_NET_TYPE_DIRECT) { + vpDisassociatePortProfileId(net->ifname, + net->mac, + net->data.direct.linkdev, +&net->data.direct.virtPortProfile, + VM_OP_MIGRATE_IN_FINISH); + } + } +} + /* Finish is the third and final step, and it runs on the destination host. */ static virDomainPtr qemudDomainMigrateFinish2 (virConnectPtr dconn, @@ -11904,6 +11946,8 @@ qemudDomainMigrateFinish2 (virConnectPtr goto cleanup; } + qemudVPAssociatePortProfiles(vm->def); + if (flags& VIR_MIGRATE_PERSIST_DEST) { if (vm->persistent) newVM = 0; @@ -12796,7 +12840,7 @@ static int qemuDomainRevertToSnapshot(vi goto endjob; rc = qemudStartVMDaemon(snapshot->domain->conn, driver, vm, NULL, - false, -1, NULL); + false, -1, NULL, VM_OP_CREATE); qemuDomainStartAudit(vm, "from-snapshot", rc>= 0); if (qemuDomainSnapshotSetInactive(vm, driver->snapshotDir)< 0) goto endjob; Index: libvirt-acl/src/util/macvtap.c =================================================================== --- libvirt-acl.orig/src/util/macvtap.c +++ libvirt-acl/src/util/macvtap.c @@ -77,9 +77,22 @@ # define LLDPAD_PID_FILE "/var/run/lldpad.pid" +static const char *vmOpStr[] = { + [VM_OP_CREATE] = "create", + [VM_OP_SAVE] = "save", + [VM_OP_RESTORE] = "restore", + [VM_OP_DESTROY] = "destroy", + [VM_OP_MIGRATE_OUT] = "migrate out", + [VM_OP_MIGRATE_IN_START] = "migrate in start", + [VM_OP_MIGRATE_IN_FINISH] = "migrate in finish", + [VM_OP_NO_OP] = "no-op" +}; + + enum virVirtualPortOp { ASSOCIATE = 0x1, DISASSOCIATE = 0x2, + PREASSOCIATE = 0x3, }; @@ -551,7 +564,8 @@ openMacvtapTap(const char *tgifname, int vnet_hdr, const unsigned char *vmuuid, virVirtualPortProfileParamsPtr virtPortProfile, - char **res_ifname) + char **res_ifname, + enum vmOperation vmOp) { const char *type = "macvtap"; int c, rc; @@ -563,6 +577,8 @@ openMacvtapTap(const char *tgifname, *res_ifname = NULL; + VIR_DEBUG("%s: VM OPERATION: %s", __FUNCTION__, vmOpStr[vmOp]); + if (tgifname) { if(ifaceGetIndex(false, tgifname,&ifindex) == 0) { if (STRPREFIX(tgifname, @@ -601,7 +617,7 @@ create_name: macaddress, linkdev, virtPortProfile, - vmuuid) != 0) { + vmuuid, vmOp) != 0) { rc = -1; goto link_del_exit; } @@ -634,7 +650,8 @@ disassociate_exit: vpDisassociatePortProfileId(cr_ifname, macaddress, linkdev, - virtPortProfile); + virtPortProfile, + vmOp); link_del_exit: link_del(cr_ifname); @@ -662,7 +679,8 @@ delMacvtap(const char *ifname, if (ifname) { vpDisassociatePortProfileId(ifname, macaddr, linkdev, - virtPortProfile); + virtPortProfile, + VM_OP_DESTROY); link_del(ifname); } } @@ -1320,6 +1338,9 @@ doPortProfileOp8021Qbg(const char *ifnam portVsi.vsi_type_id[0] = virtPort->u.virtPort8021Qbg.typeID; switch (virtPortOp) { + case PREASSOCIATE: + op = PORT_REQUEST_PREASSOCIATE; + break; case ASSOCIATE: op = PORT_REQUEST_ASSOCIATE; break; @@ -1484,6 +1505,7 @@ err_exit: * @macvtap_ifname: The name of the macvtap device * @virtPort: pointer to the object holding port profile parameters * @vmuuid : the UUID of the virtual machine + * @vmOp : The VM operation (i.e., create, no-op) * * Associate a port on a swtich with a profile. This function * may notify a kernel driver or an external daemon to run @@ -1499,13 +1521,19 @@ vpAssociatePortProfileId(const char *mac const unsigned char *macvtap_macaddr, const char *linkdev, const virVirtualPortProfileParamsPtr virtPort, - const unsigned char *vmuuid) + const unsigned char *vmuuid, + enum vmOperation vmOp) { int rc = 0; VIR_DEBUG("Associating port profile '%p' on link device '%s'", virtPort, macvtap_ifname); + VIR_DEBUG("%s: VM OPERATION: %s", __FUNCTION__, vmOpStr[vmOp]); + + if (vmOp == VM_OP_NO_OP) + return 0; + switch (virtPort->virtPortType) { case VIR_VIRTUALPORT_NONE: case VIR_VIRTUALPORT_TYPE_LAST: @@ -1513,10 +1541,16 @@ vpAssociatePortProfileId(const char *mac case VIR_VIRTUALPORT_8021QBG: rc = doPortProfileOp8021Qbg(macvtap_ifname, macvtap_macaddr, - virtPort, ASSOCIATE); + virtPort, + (vmOp == VM_OP_MIGRATE_IN_START) + ? PREASSOCIATE + : ASSOCIATE); break; case VIR_VIRTUALPORT_8021QBH: + /* avoid associating twice */ + if (vmOp == VM_OP_MIGRATE_IN_FINISH) + break; rc = doPortProfileOp8021Qbh(linkdev, virtPort, vmuuid, ASSOCIATE); @@ -1542,13 +1576,16 @@ int vpDisassociatePortProfileId(const char *macvtap_ifname, const unsigned char *macvtap_macaddr, const char *linkdev, - const virVirtualPortProfileParamsPtr virtPort) + const virVirtualPortProfileParamsPtr virtPort, + enum vmOperation vmOp) { int rc = 0; VIR_DEBUG("Disassociating port profile id '%p' on link device '%s' ", virtPort, macvtap_ifname); + VIR_DEBUG("%s: VM OPERATION: %s", __FUNCTION__, vmOpStr[vmOp]); + switch (virtPort->virtPortType) { case VIR_VIRTUALPORT_NONE: case VIR_VIRTUALPORT_TYPE_LAST: @@ -1560,6 +1597,9 @@ vpDisassociatePortProfileId(const char * break; case VIR_VIRTUALPORT_8021QBH: + /* avoid disassociating twice */ + if (vmOp == VM_OP_MIGRATE_IN_FINISH) + break; rc = doPortProfileOp8021Qbh(linkdev, virtPort, NULL, DISASSOCIATE); Index: libvirt-acl/src/util/macvtap.h =================================================================== --- libvirt-acl.orig/src/util/macvtap.h +++ libvirt-acl/src/util/macvtap.h @@ -62,6 +62,17 @@ struct _virVirtualPortProfileParams { # include "internal.h" +enum vmOperation { + VM_OP_CREATE, + VM_OP_SAVE, + VM_OP_RESTORE, + VM_OP_DESTROY, + VM_OP_MIGRATE_OUT, + VM_OP_MIGRATE_IN_START, + VM_OP_MIGRATE_IN_FINISH, + VM_OP_NO_OP, +}; + int openMacvtapTap(const char *ifname, const unsigned char *macaddress, const char *linkdev, @@ -69,7 +80,8 @@ int openMacvtapTap(const char *ifname, int vnet_hdr, const unsigned char *vmuuid, virVirtualPortProfileParamsPtr virtPortProfile, - char **res_ifname); + char **res_ifname, + enum vmOperation vmop); void delMacvtap(const char *ifname, const unsigned char *macaddress, @@ -86,12 +98,14 @@ int vpAssociatePortProfileId(const char const unsigned char *macvtap_macaddr, const char *linkdev, const virVirtualPortProfileParamsPtr virtPort, - const unsigned char *vmuuid); + const unsigned char *vmuuid, + enum vmOperation vmOp); int vpDisassociatePortProfileId(const char *macvtap_ifname, const unsigned char *macvtap_macaddr, const char *linkdev, - const virVirtualPortProfileParamsPtr virtPort); + const virVirtualPortProfileParamsPtr virtPort, + enum vmOperation vmOp); VIR_ENUM_DECL(virVirtualPort) Index: libvirt-acl/src/libvirt_macvtap.syms =================================================================== --- libvirt-acl.orig/src/libvirt_macvtap.syms +++ libvirt-acl/src/libvirt_macvtap.syms @@ -3,3 +3,5 @@ # macvtap.h openMacvtapTap; delMacvtap; +vpAssociatePortProfileId; +vpDisassociatePortProfileId;

3 3

[libvirt] RFC: add new API to known if domain has been updated
by Osier Yang 24 Nov '10

24 Nov '10

Hi, all Suppose that one updated a domain, and want to restart the domain with original configuration. However, currently, unless shutdown the domain first, and then restart or reload libvirtd, otherwise domain will still be started with changed configuration. e.g. # virsh list --all Id Name State ---------------------------------- 1 f14 running # virsh dumpxml f14 | grep -A 7 cdrom <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/cd1.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> # virsh update-device f14 cd2.xml # virsh dumpxml f14 | grep -A 7 cdrom <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/cd2.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> # virsh destroy f14 # virsh start f14 # virsh dumpxml f14 | grep -A 7 cdrom <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/cd2.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> it's caused by libvirtd doesn't known if a domain is updated or not, it updated the domain configuration in memory, but client could not known about it. As a result, one wants to start the domain with original configuration, he has to shutdown the domain first, and then restart libvirt. It will be better if client could known if the domain is updated or not, and could choose to start the domain with original configuration or the updated one. So, considered introducing a new member, the idea is adding "unsigned int updated :1;" for "virDomainObj", adn the functions which will update domain configuration should set it to "1" so that libvirtd could known the domain is updated. e.g. static int qemudDomainChangeEjectableMedia (....) { ................. /* if Media is changed or ejected successfully */ if (!vm->updated) vm->updated = 1; .................. } And the client such as virsh could provide optional parameter for user to choose if start the guest with original configuration or not. e.g. # virsh start f14 --original it tells "virsh" to start the domain with the persistent domain configuration "/etc/libvirt/qemu/$domain.xml" but not the updated one maitained by libvirtd. PS: if this API is introduced finnally, we can also add "updated" information in "dominfo". What do you think about it? patches are coming following this thread. awaiting feedback.. :-) - Osier

4 22

[libvirt] changing disk/usb stick content
by Roberto Attias (rattias) 23 Nov '10

23 Nov '10

Hello, This is a request to extend libvirt documentation, explaining how is it possible to change a floppy/CDROM/usb-stick content for a running VM from host. The VirDomainUpdateDeviceFlags function documentation states: virDomainUpdateDeviceFlags int virDomainUpdateDeviceFlags (virDomainPtr <http://libvirt.org/html/libvirt-libvirt.html#virDomainPtr> domain, const char * xml, unsigned int flags) Change a virtual device on a domain, using the flags parameter to control how the device is changed. VIR_DOMAIN_DEVICE_MODIFY_CURRENT specifies that the device change is made based on current domain state.VIR_DOMAIN_DEVICE_MODIFY_LIVE <http://libvirt.org/html/libvirt-libvirt.html#VIR_DOMAIN_DEVICE_MODIFY_L IVE> specifies that the device shall be changed on the active domain instance only and is not added to the persisted domain configuration. VIR_DOMAIN_DEVICE_MODIFY_CONFIG specifies that the device shall be changed on the persisted domain configuration only. Note that the target hypervisor must return an error if unable to satisfy flags. E.g. the hypervisor driver will return failure if LIVE is specified but it only supports modifying the persisted device allocation. This method is used for actions such changing CDROM/Floppy device media, altering the graphics configuration such as password, reconfiguring the NIC device backend connectivity, etc. It would be really nice if you could provide an example of usage of this command. Thanks to eblake on #virt who pointed me to this: https://www.redhat.com/archives/libvir-list/2010-June/msg00219.html You could easily extract an example of use from there. Thanks, Roberto

1 0

[libvirt] [PATCH] maint: sort exports
by Eric Blake 23 Nov '10

23 Nov '10

* src/libvirt_private.syms (buf.h): Sort. --- Pushing under the trivial rule. src/libvirt_private.syms | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 0547cdf..33e52e2 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -23,8 +23,8 @@ virBufferAdd; virBufferAddChar; virBufferContentAndReset; virBufferError; -virBufferEscapeString; virBufferEscapeSexpr; +virBufferEscapeString; virBufferFreeAndReset; virBufferStrcat; virBufferURIEncodeString; -- 1.7.3.2

1 0

[libvirt] [PATCH] Don't log client errors in libvirtd
by Matthias Bolte 23 Nov '10

23 Nov '10

This reverts commit Log all errors at level INFO to stop polluting syslog 04bd0360f32ec628ecf7943b3fd1468d6eb2dde5. and makes virRaiseErrorFull() only log errors when not inside libvirtd. This stops libvirtd from polluting it's own log with client errors that'll be reported and logged on the client side anyway. --- daemon/libvirtd.c | 2 ++ src/libvirt_private.syms | 2 ++ src/util/logging.c | 14 ++++++++++++++ src/util/logging.h | 4 ++++ src/util/virterror.c | 22 ++++++++++++++++++++-- 5 files changed, 42 insertions(+), 2 deletions(-) diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c index 66f1388..0b75624 100644 --- a/daemon/libvirtd.c +++ b/daemon/libvirtd.c @@ -3083,6 +3083,8 @@ int main(int argc, char **argv) { exit(EXIT_FAILURE); } + virLogSetDaemonMode(true); + while (1) { int optidx = 0; int c; diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 0547cdf..a148620 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -485,6 +485,7 @@ virRegisterStorageDriver; # logging.h virLogDefineFilter; virLogDefineOutput; +virLogGetDaemonMode; virLogGetDefaultPriority; virLogGetFilters; virLogGetNbFilters; @@ -496,6 +497,7 @@ virLogParseDefaultPriority; virLogParseFilters; virLogParseOutputs; virLogReset; +virLogSetDaemonMode; virLogSetDefaultPriority; virLogSetFromEnv; virLogShutdown; diff --git a/src/util/logging.c b/src/util/logging.c index d65dec0..e87ed6a 100644 --- a/src/util/logging.c +++ b/src/util/logging.c @@ -170,6 +170,7 @@ static const char *virLogPriorityString(virLogPriority lvl) { } static int virLogInitialized = 0; +static bool virLogDaemonMode = false; /** * virLogStartup: @@ -589,6 +590,19 @@ void virLogMessage(const char *category, int priority, const char *funcname, VIR_FREE(msg); } +bool +virLogGetDaemonMode(void) +{ + return virLogDaemonMode; +} + +void +virLogSetDaemonMode(bool daemonMode) +{ + virLogDaemonMode = daemonMode; +} + + static int virLogOutputToFd(const char *category ATTRIBUTE_UNUSED, int priority ATTRIBUTE_UNUSED, const char *funcname ATTRIBUTE_UNUSED, diff --git a/src/util/logging.h b/src/util/logging.h index 574f68d..ef78e97 100644 --- a/src/util/logging.h +++ b/src/util/logging.h @@ -22,6 +22,8 @@ #ifndef __VIRTLOG_H_ # define __VIRTLOG_H_ +# include <stdbool.h> + # include "internal.h" # include "buf.h" @@ -139,5 +141,7 @@ extern int virLogParseOutputs(const char *output); extern void virLogMessage(const char *category, int priority, const char *funcname, long long linenr, int flags, const char *fmt, ...) ATTRIBUTE_FMT_PRINTF(6, 7); +extern bool virLogGetDaemonMode(void); +extern void virLogSetDaemonMode(bool daemonMode); #endif diff --git a/src/util/virterror.c b/src/util/virterror.c index 83c4c9d..14d92fd 100644 --- a/src/util/virterror.c +++ b/src/util/virterror.c @@ -64,6 +64,18 @@ void *virUserData = NULL; /* associated data */ }} \ } +static virLogPriority virErrorLevelPriority(virErrorLevel level) { + switch (level) { + case VIR_ERR_NONE: + return(VIR_LOG_INFO); + case VIR_ERR_WARNING: + return(VIR_LOG_WARN); + case VIR_ERR_ERROR: + return(VIR_LOG_ERROR); + } + return(VIR_LOG_ERROR); +} + static const char *virErrorDomainName(virErrorDomain domain) { const char *dom = "unknown"; switch (domain) { @@ -703,9 +715,15 @@ virRaiseErrorFull(virConnectPtr conn ATTRIBUTE_UNUSED, /* * Hook up the error or warning to the logging facility * XXXX should we include filename as 'category' instead of domain name ? + * + * When inside libvirtd don't log errors, this would pollute the syslog + * with client errors. Those will get reported and logged on the client + * side anyway. */ - virLogMessage(virErrorDomainName(domain), VIR_LOG_INFO, - funcname, linenr, 1, "%s", str); + if (!virLogGetDaemonMode()) { + virLogMessage(virErrorDomainName(domain), virErrorLevelPriority(level), + funcname, linenr, 1, "%s", str); + } /* * Save the information about the error -- 1.7.0.4

3 2

[libvirt] [PATCH] remote: Fix TLS transport on Windows
by Matthias Bolte 23 Nov '10

23 Nov '10

gnulib wraps Windows' SOCKET handle based send() and recv() functions into file descriptor based ones that are use in libvirt. By default GnuTLS uses the SOCKET handle based send() and recv() on Windows. This makes gnutls_handshake() fail internally with a WSAENOTSOCK error because libvirt passes a file descriptor; GnuTLS needs the SOCKET handle. To avoid this mismatch make sure that GnuTLS uses gnulib's replacment functions, by setting custom pull() and push() functions for GnuTLS. --- src/remote/remote_driver.c | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-) diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index f45476a..87977ab 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -1212,6 +1212,20 @@ initialize_gnutls(void) static int verify_certificate (virConnectPtr conn, struct private_data *priv, gnutls_session_t session); +#if HAVE_WINSOCK2_H +static ssize_t +custom_gnutls_push(void *s, const void *buf, size_t len) +{ + return send((int)(long)s, buf, len, 0); +} + +static ssize_t +custom_gnutls_pull(void *s, void *buf, size_t len) +{ + return recv((int)(long)s, buf, len, 0); +} +#endif + static gnutls_session_t negotiate_gnutls_on_connection (virConnectPtr conn, struct private_data *priv, @@ -1266,6 +1280,13 @@ negotiate_gnutls_on_connection (virConnectPtr conn, gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) (long) priv->sock); +#if HAVE_WINSOCK2_H + /* Make sure GnuTLS uses gnulib's replacment functions for send() and + * recv() on Windows */ + gnutls_transport_set_push_function(session, custom_gnutls_push); + gnutls_transport_set_pull_function(session, custom_gnutls_pull); +#endif + /* Perform the TLS handshake. */ again: err = gnutls_handshake (session); -- 1.7.0.4

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[libvirt] [PATCH] tests: Fix dispatching internal error reports
by Cole Robinson 23 Nov '10

23 Nov '10

Without this fix, the test suite doesn't print error messages when a libvirt function fails. Signed-off-by: Cole Robinson <crobinso(a)redhat.com> --- tests/testutils.c | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-) diff --git a/tests/testutils.c b/tests/testutils.c index 96181b2..8a3439d 100644 --- a/tests/testutils.c +++ b/tests/testutils.c @@ -126,12 +126,18 @@ virtTestRun(const char *title, int nloops, int (*body)(const void *data), const if (ts) GETTIMEOFDAY(&before); + virResetLastError(); - if ((ret = body(data)) != 0) - break; + ret = body(data); virErrorPtr err = virGetLastError(); - if (err) + if (err) { virDispatchError(NULL); + } + + if (ret != 0) { + break; + } + if (ts) { GETTIMEOFDAY(&after); ts[i] = DIFF_MSEC(&after, &before); -- 1.7.3.2

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[libvirt] [PATCH 0/6] Fix state driver hotplug semantics
by Cole Robinson 23 Nov '10

23 Nov '10

Currently, domain hotplug operations in the state drivers (QEMU, LXC, ...) have strange semantics: a hotplug config change will stick around in memory until the domain is either redefined or libvirtd is restarted. This series fixes hotplug config changes to be discarded when the VM is stopped, which AFAICT is the expected behavior. A few bugs with setvcpus implementations are also addressed. Thanks, Cole Cole Robinson (6): domain_conf: Add virDomainObjSetDefTransient Make state driver device hotplug/update actually transient conf: domain: Improve vcpus validation reporting qemu: setvcpus: Fix maxvcpus check qemu: setvcpus: Simplify altering the persistent config qemu: setvcpus: Save config changes to disk src/conf/domain_conf.c | 76 +++++++++++++++++++++++++++++++++++++++-- src/conf/domain_conf.h | 5 +++ src/libvirt_private.syms | 2 + src/lxc/lxc_driver.c | 3 ++ src/qemu/qemu_driver.c | 56 ++++++++++++++--------------- src/test/test_driver.c | 86 +++++++++++++++++++++------------------------- src/uml/uml_driver.c | 5 ++- 7 files changed, 153 insertions(+), 80 deletions(-) -- 1.7.3.2

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[libvirt] RFC: CPU counting in qemu driver
by Jiri Denemark 23 Nov '10

23 Nov '10

Hi all, libvirt's qemu driver doesn't follow the semantics of CPU-related counters in nodeinfo structure, which is nodes : the number of NUMA cell, 1 for uniform mem access sockets : number of CPU socket per node cores : number of core per socket threads : number of threads per core Qemu driver ignores the "per node" part of sockets semantics, and only gives total number of sockets found on the host. That actually makes more sense but we have to fix it since it doesn't follow the documented semantics of public API. That is, we would do something like the following at the end of linuxNodeInfoCPUPopulate(): nodeinfo->sockets /= nodeinfo->nodes; The problem is that NUMA topology is independent on CPU topology and there are systems for which nodeinfo->sockets % nodeinfo->nodes != 0. An example being the following NUMA topology of a system with 4 CPU sockets: node0 CPUs: 0-5 total memory: 8252920 node1 CPUs: 6-11 total memory: 16547840 node2 CPUs: 12-17 total memory: 8273920 node3 CPUs: 18-23 total memory: 16547840 node4 CPUs: 24-29 total memory: 8273920 node5 CPUs: 30-35 total memory: 16547840 node6 CPUs: 36-41 total memory: 8273920 node7 CPUs: 42-47 total memory: 16547840 which shows that the cores are actually mapped via the AMD intra-socket interconnects. Note that this funky topology was verified to be correct so it's not just a kernel bug which would result in wrong topology being reported. So the suggested calculation wouldn't work on such systems and we cannot really follow the API semantics since it doesn't work in this case. My suggestion is to use the following code in linuxNodeInfoCPUPopulate(): if (nodeinfo->sockets % nodeinfo->nodes == 0) nodeinfo->sockets /= nodeinfo->nodes; else nodeinfo->nodes = 1; That is we would lie about number of NUMA nodes on funky systems. If nodeinfo->nodes is greater than 1, then applications can rely on it being correct. If it's 1, applications that care about NUMA topology should consult /capabilities/host/topology/cells of capabilities XML to check the number of NUMA nodes in a reliable way, which I guess such applications would do anyway. However, if you have a better idea of fixing the issue while staying more compatible with current semantics, don't hesitate to share it. Note, that we have VIR_NODEINFO_MAXCPUS macro in libvirt.h which computes maximum number of CPUs as (nodes * sockets * cores * threads) and we need to keep this working. Jirka

2 6

[libvirt] [PATCH 0/4] Support the QED disk image format (V2)
by Adam Litke 23 Nov '10

23 Nov '10

Changes since V1: - Fix virStorageFileMatchesVersion() for formats without version info - Allow backingStore format probing for QED images since it is safe Qemu is about to gain support for a new disk image format: QED. Details on this format (including specification) can be found here: http://wiki.qemu.org/Features/QED. This short series of patches allows QED images to be used with libvirt. Adam Litke (4): Allow probing of image formats without version information QED: Basic support for QED images storage_file: Add a new flag to mark backing files that are safe to probe Support for probing qed image metadata src/conf/domain_conf.c | 4 ++ src/util/storage_file.c | 89 +++++++++++++++++++++++++++++++++++++++++++++-- src/util/storage_file.h | 2 + 3 files changed, 92 insertions(+), 3 deletions(-) -- 1.7.3.2.164.g6f10c

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