December 2011 - Devel - libvirt List Archives

[libvirt] virtio-scsi support proposal, v2
by Paolo Bonzini 04 Jan '12

04 Jan '12

Here is a revised version of the virtio-scsi proposal. There's actually not too much left intact from v1. :) The main simplification is in how SCSI hosts can be addressed in a stable manner. SCSI controller models ====================== Existing controller models are "auto", "buslogic", "lsilogic", "lsias1068", or "vmpvscsi". The new controller model "virtio-scsi" is added. The model "lsilogic" is mapped to the existing "lsi" device in QEMU. When PPC64 support will be added, another controller model "spapr-vscsi" will be added. Stable addressing for SCSI devices ================================== The existing <address type='drive' ...> element will be extended as follows: <address type='drive' controller='...' bus='...' target='...' unit='...'/> where controller selects the qdev parent device, while bus/target/unit are passed as qdev properties (the QEMU names are respectively channel, scsi-id, lun). Libvirt should check for the QEMU "scsi-disk.channel" property. If it is unavailable, QEMU will only support channel=lun=0 and 0<=target<=7. LUN passthrough: block devices ============================== A SCSI block device from the host can be attached to a domain in two ways: as an emulated LUN with SCSI commands implemented within QEMU, or by passing SCSI commands down to the block device. The former is handled by the existing <disk type='file'>, <disk type='block'> and <disk type='network'> XML syntax. The latter is not yet supported. On the QEMU side, LUN passthrough is implemented by one of the scsi-generic and scsi-block devices. Scsi-generic requires a /dev/sg device name, and can be applied to any device. scsi-block is only available in QEMU 1.0 or newer, requires a block device, can be applied only to block devices (sd/sr) and has better performance. To implement LUN passthrough for block device, libvirt will add a new <disk device='lun'> attribute. When, device='lun' is passed, the device attribute is ignored. Example: <disk type='block' device='lun'> <disk name='qemu' type='raw'/> <source dev='/dev/sda'/> <target dev='sda' bus='scsi'> <address type='drive' controller='...' bus='...' target='...' unit='...'/> </disk> Also, virtio-blk handling will be enhanced to disable SG_IO passthrough when <disk device='disk'>, and only enable it when <disk device='lun'>. (I am not sure whether the 'lun' value should be for the type or device attribute. Laine has a patch to implement it for virtio disks which uses "type"). This syntax makes it clear what is the passed-through device, and at the same time it makes it very easy to switch a disk between emulated and passthrough modes. Also, a stable addressing for the source device is provided by /dev/disk/by-id and /dev/disk/by-path. Stable SCSI host addressing =========================== SCSI host number in Linux is not stable. An alternative stable addressing is required to pass a whole host or target to a guest. One place in which this could be supported is the SCSI volume pool syntax: <pool type='scsi'> <name>virtimages</name> <source> <adapter name='host0'/> </source> <target> <path>/dev/disk/by-id</path> </target> </pool> libvirt will deprecate the above form for the adapter element and provide the following forms: <adapter name='scsi_host0'/> <adapter parent='pci_0000_00_1f_2' unique_id='1'/> The existing form changes from host0 to scsi_host0, for consistency with the naming that is used in nodedev. The new parent/unique_id addressing uses a parent PCI device and a unique id that Linux provides in sysfs. In order to determine the SCSI host number, libvirt would scan all files matched by the glob pattern /sys/bus/pci/devices/0000:00:1f.2/*/scsi_host/*/unique_id, looking for the one that contains "1". The unique_id can be omitted. In this case, the pool will refer to the host with the smallest unique_id under the given device. Furthermore, a SCSI pool can be restricted to one target using an additional element: <source> <adapter name='scsi_host0'/> <address type='scsi' bus='0' target='0'/> </source> (bus defaults to 0, target is mandatory). Generic passthrough =================== Generic device passthrough at the LUN, target or host level builds on the extensions to SCSI addressing from the previous section. Passing a single LUN extends the <hostdev> tag as follows: <hostdev type='scsi'> <source> <adapter name='scsi_host0'/> <address type='scsi' bus='0' target='0' unit='0'/> </source> <target> <address type='scsi' controller='...' bus='...' target='...' unit='...'/> </target> </hostdev> This will map to a -drive QEMU option referring to a scsi-generic device, and a "-device scsi-generic" option referring to the drive. libvirt can determine the /dev/sg file to use by reading the directory /sys/bus/scsi/devices/target*/*/scsi_generic. These devices might also be shown in the nodedev tree, similar to block devices. Whenever a domain should receive all devices belonging to a SCSI host, a similar <source> item should be included within the <controller type='scsi'> element: <controller type='scsi' model='virtio-scsi'> <source> <adapter name='scsi_host0'/> </source> </controller> In this case, libvirt should use scsi-block rather than scsi-generic for block devices. NPIV-based SCSI host passthrough ================================ In NPIV, a virtual HBA is created using "virsh nodedev-create" and passed to the guest. Passing through a whole SCSI host is quite common when using NPIV. As a result, it is desirable to easily address virtual HBAs both in SCSI storage pools and in <controller type='scsi'> elements. Here are two proposals for how to refer to NPIV adapters: 1) add persistent nodedevs via commands nodedev-define, nodedev-undefine, nodedev-start. The persistent nodedevs have a name, and this can be used simply with <adapter name='NAME'>. 2) Virtual adapters do have a stable address, namely its WWN. This can be used in a third <adapter> syntax: <source> <adapter type='fc_host' wwpn='...' wwnn='...'/> </source>

3 3

[libvirt] [PATCH 0/3] python: Fix memory leaks
by ajia＠redhat.com 04 Jan '12

04 Jan '12

From: Alex Jia <ajia(a)redhat.com> This series patches fix memory leaks issues. Detected by valgrind. Alex Jia (3): * python/libvirt-override.c: fix memory leaks on libvirt_virDomainBlockStatsFlags. * python/libvirt-override.c: fix memory leaks on libvirt_virDomainGetSchedulerParameters and libvirt_virDomainGetSchedulerParametersFlags. * python/libvirt-override.c: fix memory leaks on libvirt_virDomainGetMemoryParameters. Signed-off-by: Alex Jia <ajia(a)redhat.com>

3 5

[libvirt] Access to the secretDriver in a storage backend?
by Wido den Hollander 04 Jan '12

04 Jan '12

Hi, I'm working on a storage backend for libvirt which needs credentials to access the storage pool. I want to use the build in secret manager from libvirt, but it seems I do not have access to the secretDriver in a storage backend? static int virStorageBackendRBDRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED, virStoragePoolObjPtr pool) { if (pool->def->source.auth.cephx.secret != NULL) { virSecretPtr secret; secret = conn->secretDriver->lookupByUUID(conn, pool->def->source.auth.cephx.secret); virSecretFree(secret); } return 0; } It goes wrong at this point: conn->secretDriver->lookupByUUID(conn,pool->def->source.auth.cephx.secret); "error: dereferencing pointer to incomplete type" Is the secretDriver available in a storage backend? In storage_backend.c I see that it should be available, correct? I might be missing something here, so that's why I'm asking it here. Thank you, Wido

2 3

[libvirt] PATCH: Inform QEMU "prepare" hook of migration in progress
by Adam Tilghman 03 Jan '12

03 Jan '12

>From: Eric Blake <eblake redhat com> >Subject: Re: [libvirt-users] Wanted: method for qemu hook script to know if called for migration >Date: Mon, 25 Jul 2011 14:17:08 -0600 > >>As a feature suggestion, it would be nice if that fourth input variable, >>currently "-", was something like "migrate" in this instance. > >Yes, that is probably a bug worth fixing. I would also find it useful for the QEMU "prepare" hook to be told whether it's being called in the context of a migration. (In our case, we use that hook to manage shared DRBD storage, and only permit Primary/Primary mode in the context of a migration.) The attached 1-line patch supplies the hook with an additional argument "migration-target" when appropriate. Submitted as https://bugzilla.redhat.com/show_bug.cgi?id=768054 --- src/qemu/qemu_process.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 9123f4c..ef9f7eb 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -2936,7 +2936,7 @@ int qemuProcessStart(virConnectPtr conn, int hookret; hookret = virHookCall(VIR_HOOK_DRIVER_QEMU, vm->def->name, - VIR_HOOK_QEMU_OP_PREPARE, VIR_HOOK_SUBOP_BEGIN, NULL, xml); + VIR_HOOK_QEMU_OP_PREPARE, VIR_HOOK_SUBOP_BEGIN, migrateFrom ? "migration-target" : NULL, xml); VIR_FREE(xml); /* -- 1.7.1 -- Adam Tilghman Systems Support / Academic Computing & Media Services agt(a)ucsd.edu 858-822-0711 University of California, San Diego

4 4

[libvirt] [PATCHv4 0/6] Add new command domiftune
by Hu Tao 03 Jan '12

03 Jan '12

This series adds a new command domiftune to get/set parameters of domain's network interfaces. Supported parameters are bandwidth settings. Currently the network interface bandwidth can only be set: - in domain's xml before the domain is up - when attaching an interface by attach-interface With this series, users can change network interface bandwidth settings using virsh, whether the domain is running or not. changes: - fix a bug that previous bandwidth parameters are lost when setting only inbound or outbound lively - some minor improvements - rename virDomainFindNetDef to virDomainNetFind Hu Tao (6): Add API virDomain{S,G}etInterfaceParameters virDomain{S,G}etInterfaceParameters: the main entry points Add virDomain{S,G}etInterfaceparameters support to the remote driver Add a function virDomainNetFind Add virDomain{S,G}etInterfaceParameters support to qemu driver Enable the virDomain{S,G}etInterfaceParameters in virsh daemon/remote.c | 64 ++++++++ include/libvirt/libvirt.h.in | 50 ++++++ python/generator.py | 2 + src/conf/domain_conf.c | 39 +++++ src/conf/domain_conf.h | 3 + src/driver.h | 12 ++ src/libvirt.c | 130 ++++++++++++++++ src/libvirt_private.syms | 1 + src/libvirt_public.syms | 2 + src/qemu/qemu_driver.c | 353 ++++++++++++++++++++++++++++++++++++++++++ src/remote/remote_driver.c | 52 ++++++ src/remote/remote_protocol.x | 28 ++++- src/remote_protocol-structs | 24 +++ tools/virsh.c | 198 +++++++++++++++++++++++ tools/virsh.pod | 21 +++ 15 files changed, 978 insertions(+), 1 deletions(-) -- 1.7.4.4

4 16

[libvirt] [PATCH 0/2] qemu: add new disk type='lun' for bus='virtio'
by Laine Stump 03 Jan '12

03 Jan '12

These two patches are in response to CVE-2011-4127: http://seclists.org/oss-sec/2011/q4/536 Once the kernel security fix and corresponding qemu mitigation patch are in place, access to SG_IO commands from qemu guests will be disabled by default. This patch series provides a way to explicitly enable such support when it is required. In a discussion just before sending this patch series, Paolo Bonzini wondered if rather than the xml syntax being what's proposed here: <disk type='block' device='disk' dev='/dev/sda'>  <disk type='lun' device='disk' dev='/dev/sda'>  maybe it should instead be: <disk type='block' device='disk' dev='/dev/sda'>  <disk type='block' device='lun' dev='/dev/sda'>  I guess it partly depends on whether we would ever want to turn on SG_IO for a disk with device='cdrom|floppy' vs. if we would ever want to turn it on for type='file|dir|network'. Opinions?

4 8

[libvirt] [libvirt-glib] API to set SPICE password
by Zeeshan Ali (Khattak) 02 Jan '12

02 Jan '12

From: "Zeeshan Ali (Khattak)" <zeeshanak(a)gnome.org> --- .../libvirt-gconfig-domain-graphics-spice.c | 10 ++++++++++ .../libvirt-gconfig-domain-graphics-spice.h | 3 +++ libvirt-gconfig/libvirt-gconfig.sym | 1 + 3 files changed, 14 insertions(+), 0 deletions(-) diff --git a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c index 483f7d7..f7828c1 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c @@ -104,3 +104,13 @@ void gvir_config_domain_graphics_spice_set_tls_port(GVirConfigDomainGraphicsSpic "tlsPort", G_TYPE_INT, port, NULL); } + +void gvir_config_domain_graphics_spice_set_password(GVirConfigDomainGraphicsSpice *graphics, + const char *password) +{ + g_return_if_fail(GVIR_IS_CONFIG_DOMAIN_GRAPHICS_SPICE(graphics)); + + gvir_config_object_set_attribute(GVIR_CONFIG_OBJECT(graphics), + "passwd", password, + NULL); +} diff --git a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.h b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.h index b1b8361..a4004eb 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.h +++ b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.h @@ -71,6 +71,9 @@ void gvir_config_domain_graphics_spice_set_port(GVirConfigDomainGraphicsSpice *g void gvir_config_domain_graphics_spice_set_tls_port(GVirConfigDomainGraphicsSpice *graphics, int port); +void gvir_config_domain_graphics_spice_set_password(GVirConfigDomainGraphicsSpice *graphics, + const char *password); + G_END_DECLS #endif /* __LIBVIRT_GCONFIG_DOMAIN_GRAPHICS_SPICE_H__ */ diff --git a/libvirt-gconfig/libvirt-gconfig.sym b/libvirt-gconfig/libvirt-gconfig.sym index 39f39d4..53f84d4 100644 --- a/libvirt-gconfig/libvirt-gconfig.sym +++ b/libvirt-gconfig/libvirt-gconfig.sym @@ -96,6 +96,7 @@ LIBVIRT_GCONFIG_0.0.3 { gvir_config_domain_graphics_spice_set_autoport; gvir_config_domain_graphics_spice_set_port; gvir_config_domain_graphics_spice_set_tls_port; + gvir_config_domain_graphics_spice_set_password; gvir_config_domain_graphics_vnc_get_type; gvir_config_domain_graphics_vnc_new; -- 1.7.7.4

2 2

[libvirt] [PATCH v5] Implement DNS SRV record into the bridge driver
by Michal Novotny 02 Jan '12

02 Jan '12

Hi, this is the fifth version of my SRV record for DNSMasq patch rebased for the current codebase to the bridge driver and libvirt XML file to include support for the SRV records in the DNS. The syntax is based on DNSMasq man page and tests for both xml2xml and xml2argv were added as well. There are some things written a better way in comparison with version 4, mainly there's no hack in tests/networkxml2argvtest.c and also the xPath context is changed to use a simpler query using the virXPathInt() function relative to the current node. Also, the patch is also fixing the networkxml2argv test to pass both checks, i.e. both unit tests and also syntax check. Please review, Michal Signed-off-by: Michal Novotny <minovotn(a)redhat.com> --- docs/formatnetwork.html.in | 12 ++ docs/schemas/network.rng | 20 ++- docs/schemas/networkcommon.rng | 17 +++ src/conf/network_conf.c | 134 +++++++++++++++++++- src/conf/network_conf.h | 16 +++ src/network/bridge_driver.c | 43 +++++++ .../nat-network-dns-srv-record-minimal.argv | 16 +++ .../nat-network-dns-srv-record-minimal.xml | 26 ++++ .../nat-network-dns-srv-record.argv | 16 +++ .../nat-network-dns-srv-record.xml | 26 ++++ tests/networkxml2argvtest.c | 2 + .../nat-network-dns-srv-record-minimal.xml | 26 ++++ .../nat-network-dns-srv-record.xml | 26 ++++ .../nat-network-dns-srv-record-minimal.xml | 26 ++++ .../nat-network-dns-srv-record.xml | 26 ++++ 15 files changed, 423 insertions(+), 9 deletions(-) create mode 100644 tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv create mode 100644 tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.xml create mode 100644 tests/networkxml2argvdata/nat-network-dns-srv-record.argv create mode 100644 tests/networkxml2argvdata/nat-network-dns-srv-record.xml create mode 100644 tests/networkxml2xmlin/nat-network-dns-srv-record-minimal.xml create mode 100644 tests/networkxml2xmlin/nat-network-dns-srv-record.xml create mode 100644 tests/networkxml2xmlout/nat-network-dns-srv-record-minimal.xml create mode 100644 tests/networkxml2xmlout/nat-network-dns-srv-record.xml diff --git a/docs/formatnetwork.html.in b/docs/formatnetwork.html.in index 02302fa..755d510 100644 --- a/docs/formatnetwork.html.in +++ b/docs/formatnetwork.html.in @@ -345,6 +345,7 @@ <domain name="example.com"/> <dns> <txt name="example" value="example value" /> + <srv service='name' protocol='tcp' domain='test-domain-name' target='.' port='1024' priority='10' weight='10'/> <host ip='192.168.122.2'> <hostname>myhost</hostname> <hostname>myhostalias</hostname> @@ -396,6 +397,17 @@ <span class="since">Since 0.9.3</span> </dd> </dl> + <dl> + <dt><code>srv</code></dt> + <dd>The <code>dns</code> element can have also 0 or more <code>srv</code> + record elements. Each <code>srv</code> record element defines a DNS SRV record + and has 2 mandatory and 5 optional attributes. The mandatory attributes + are service name and protocol (tcp, udp) and the optional attributes are + target, port, priority, weight and domain as defined in DNS server SRV + RFC (RFC 2782). + <span class="since">Since 0.9.9</span> + </dd> + </dl> </dd> <dt><code>ip</code></dt> <dd>The <code>address</code> attribute defines an IPv4 address in diff --git a/docs/schemas/network.rng b/docs/schemas/network.rng index 937e180..5d58fe4 100644 --- a/docs/schemas/network.rng +++ b/docs/schemas/network.rng @@ -138,6 +138,19 @@ </element> </zeroOrMore> <zeroOrMore> + <element name="srv"> + <attribute name="service"><text/></attribute> + <attribute name="protocol"><ref name="protocol"/></attribute> + <optional> + <attribute name="domain"><ref name="dnsName"/></attribute> + <attribute name="target"><text/></attribute> + <attribute name="port"><ref name="unsignedShort"/></attribute> + <attribute name="priority"><ref name="unsignedShort"/></attribute> + <attribute name="weight"><ref name="unsignedShort"/></attribute> + </optional> + </element> + </zeroOrMore> + <zeroOrMore> <element name="host"> <attribute name="ip"><ref name="ipv4Addr"/></attribute> <oneOrMore> @@ -216,11 +229,4 @@ </interleave> </element> </define> - - <define name='addr-family'> - <data type='string'> - <param name="pattern">(ipv4)|(ipv6)</param> - </data> - </define> - </grammar> diff --git a/docs/schemas/networkcommon.rng b/docs/schemas/networkcommon.rng index 3a168c3..2328892 100644 --- a/docs/schemas/networkcommon.rng +++ b/docs/schemas/networkcommon.rng @@ -95,4 +95,21 @@ <param name="minInclusive">1</param> </data> </define> + + <define name='unsignedShort'> + <data type='integer'> + <param name="minInclusive">0</param> + <param name="maxInclusive">65535</param> + </data> + </define> + <define name='protocol'> + <data type='string'> + <param name='pattern'>(tcp)|(udp)</param> + </data> + </define> + <define name='addr-family'> + <data type='string'> + <param name="pattern">(ipv4)|(ipv6)</param> + </data> + </define> </grammar> diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c index 1058b07..3479543 100644 --- a/src/conf/network_conf.c +++ b/src/conf/network_conf.c @@ -138,6 +138,15 @@ static void virNetworkDNSDefFree(virNetworkDNSDefPtr def) } } VIR_FREE(def->hosts); + if (def->nsrvrecords) { + while (def->nsrvrecords--) { + VIR_FREE(def->srvrecords[def->nsrvrecords].domain); + VIR_FREE(def->srvrecords[def->nsrvrecords].service); + VIR_FREE(def->srvrecords[def->nsrvrecords].protocol); + VIR_FREE(def->srvrecords[def->nsrvrecords].target); + } + } + VIR_FREE(def->srvrecords); VIR_FREE(def); } } @@ -553,8 +562,103 @@ error: } static int +virNetworkDNSSrvDefParseXML(virNetworkDNSDefPtr def, + xmlNodePtr cur, + xmlXPathContextPtr ctxt) +{ + char *domain; + char *service; + char *protocol; + char *target; + int port; + int priority; + int weight; + int ret = 0; + + if (!(service = virXMLPropString(cur, "service"))) { + virNetworkReportError(VIR_ERR_XML_DETAIL, + "%s", _("Missing required service attribute in dns srv record")); + goto error; + } + + if (strlen(service) > DNS_RECORD_LENGTH_SRV) { + char *name = NULL; + + virAsprintf(&name, _("Service name is too long, limit is %d bytes"), DNS_RECORD_LENGTH_SRV); + virNetworkReportError(VIR_ERR_XML_DETAIL, + "%s", name); + free(name); + goto error; + } + + if (!(protocol = virXMLPropString(cur, "protocol"))) { + virNetworkReportError(VIR_ERR_XML_DETAIL, + _("Missing required protocol attribute in dns srv record '%s'"), service); + goto error; + } + + /* Check whether protocol value is the supported one */ + if (STRNEQ(protocol, "tcp") && (STRNEQ(protocol, "udp"))) { + virNetworkReportError(VIR_ERR_XML_DETAIL, + _("Invalid protocol attribute value '%s'"), protocol); + goto error; + } + + if (VIR_REALLOC_N(def->srvrecords, def->nsrvrecords + 1) < 0) { + virReportOOMError(); + goto error; + } + + def->srvrecords[def->nsrvrecords].service = service; + def->srvrecords[def->nsrvrecords].protocol = protocol; + def->srvrecords[def->nsrvrecords].domain = NULL; + def->srvrecords[def->nsrvrecords].target = NULL; + def->srvrecords[def->nsrvrecords].port = 0; + def->srvrecords[def->nsrvrecords].priority = 0; + def->srvrecords[def->nsrvrecords].weight = 0; + + /* Following attributes are optional but we had to make sure they're NULL above */ + if ((target = virXMLPropString(cur, "target")) && (domain = virXMLPropString(cur, "domain"))) { + xmlNodePtr save_ctxt = ctxt->node; + + ctxt->node = cur; + if (virXPathInt("string(./@port)", ctxt, &port)) + def->srvrecords[def->nsrvrecords].port = port; + + if (virXPathInt("string(./@priority)", ctxt, &priority)) + def->srvrecords[def->nsrvrecords].priority = priority; + + if (virXPathInt("string(./@weight)", ctxt, &weight)) + def->srvrecords[def->nsrvrecords].weight = weight; + ctxt->node = save_ctxt; + + def->srvrecords[def->nsrvrecords].domain = domain; + def->srvrecords[def->nsrvrecords].target = target; + def->srvrecords[def->nsrvrecords].port = port; + def->srvrecords[def->nsrvrecords].priority = priority; + def->srvrecords[def->nsrvrecords].weight = weight; + } + + def->nsrvrecords++; + + goto cleanup; + +error: + VIR_FREE(domain); + VIR_FREE(service); + VIR_FREE(protocol); + VIR_FREE(target); + + ret = -1; + +cleanup: + return ret; +} + +static int virNetworkDNSDefParseXML(virNetworkDNSDefPtr *dnsdef, - xmlNodePtr node) + xmlNodePtr node, + xmlXPathContextPtr ctxt) { xmlNodePtr cur; int ret = -1; @@ -599,6 +703,11 @@ virNetworkDNSDefParseXML(virNetworkDNSDefPtr *dnsdef, name = NULL; value = NULL; } else if (cur->type == XML_ELEMENT_NODE && + xmlStrEqual(cur->name, BAD_CAST "srv")) { + ret = virNetworkDNSSrvDefParseXML(def, cur, ctxt); + if (ret < 0) + goto error; + } else if (cur->type == XML_ELEMENT_NODE && xmlStrEqual(cur->name, BAD_CAST "host")) { ret = virNetworkDNSHostsDefParseXML(def, cur); if (ret < 0) @@ -887,7 +996,7 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt) dnsNode = virXPathNode("./dns", ctxt); if (dnsNode != NULL) { - if (virNetworkDNSDefParseXML(&def->dns, dnsNode) < 0) + if (virNetworkDNSDefParseXML(&def->dns, dnsNode, ctxt) < 0) goto error; } @@ -1146,6 +1255,27 @@ virNetworkDNSDefFormat(virBufferPtr buf, def->txtrecords[i].value); } + for (i = 0 ; i < def->nsrvrecords ; i++) { + if (def->srvrecords[i].service && def->srvrecords[i].protocol) { + virBufferAsprintf(buf, " <srv service='%s' protocol='%s'", + def->srvrecords[i].service, + def->srvrecords[i].protocol); + + if (def->srvrecords[i].domain) + virBufferAsprintf(buf, " domain='%s'", def->srvrecords[i].domain); + if (def->srvrecords[i].target) + virBufferAsprintf(buf, " target='%s'", def->srvrecords[i].target); + if (def->srvrecords[i].port) + virBufferAsprintf(buf, " port='%d'", def->srvrecords[i].port); + if (def->srvrecords[i].priority) + virBufferAsprintf(buf, " priority='%d'", def->srvrecords[i].priority); + if (def->srvrecords[i].weight) + virBufferAsprintf(buf, " weight='%d'", def->srvrecords[i].weight); + + virBufferAsprintf(buf, "/>\n"); + } + } + if (def->nhosts) { int ii, j; diff --git a/src/conf/network_conf.h b/src/conf/network_conf.h index 1be20f8..5ef4878 100644 --- a/src/conf/network_conf.h +++ b/src/conf/network_conf.h @@ -24,6 +24,8 @@ #ifndef __NETWORK_CONF_H__ # define __NETWORK_CONF_H__ +#define DNS_RECORD_LENGTH_SRV (512 - 30) /* Limit minus overhead as mentioned in RFC-2782 */ + # include <libxml/parser.h> # include <libxml/tree.h> # include <libxml/xpath.h> @@ -69,6 +71,18 @@ struct _virNetworkDNSTxtRecordsDef { char *value; }; +typedef struct _virNetworkDNSSrvRecordsDef virNetworkDNSSrvRecordsDef; +typedef virNetworkDNSSrvRecordsDef *virNetworkDNSSrvRecordsDefPtr; +struct _virNetworkDNSSrvRecordsDef { + char *domain; + char *service; + char *protocol; + char *target; + int port; + int priority; + int weight; +}; + struct _virNetworkDNSHostsDef { virSocketAddr ip; int nnames; @@ -82,6 +96,8 @@ struct _virNetworkDNSDef { virNetworkDNSTxtRecordsDefPtr txtrecords; unsigned int nhosts; virNetworkDNSHostsDefPtr hosts; + unsigned int nsrvrecords; + virNetworkDNSSrvRecordsDefPtr srvrecords; }; typedef struct _virNetworkDNSDef *virNetworkDNSDefPtr; diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index 63338a2..0c0e7a7 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -527,6 +527,49 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network, virCommandAddArgPair(cmd, "--txt-record", record); VIR_FREE(record); } + + for (i = 0; i < dns->nsrvrecords; i++) { + char *record = NULL; + char *recordPort = NULL; + char *recordPriority = NULL; + char *recordWeight = NULL; + + if (dns->srvrecords[i].service && dns->srvrecords[i].protocol) { + if (dns->srvrecords[i].port) { + if (virAsprintf(&recordPort, "%d", dns->srvrecords[i].port) < 0) { + virReportOOMError(); + goto cleanup; + } + } + if (dns->srvrecords[i].priority) { + if (virAsprintf(&recordPriority, "%d", dns->srvrecords[i].priority) < 0) { + virReportOOMError(); + goto cleanup; + } + } + if (dns->srvrecords[i].weight) { + if (virAsprintf(&recordWeight, "%d", dns->srvrecords[i].weight) < 0) { + virReportOOMError(); + goto cleanup; + } + } + + if (virAsprintf(&record, "%s.%s.%s,%s,%s,%s,%s", + dns->srvrecords[i].service, + dns->srvrecords[i].protocol, + dns->srvrecords[i].domain ? dns->srvrecords[i].domain : "", + dns->srvrecords[i].target ? dns->srvrecords[i].target : "", + recordPort ? recordPort : "", + recordPriority ? recordPriority : "", + recordWeight ? recordWeight : "") < 0) { + virReportOOMError(); + goto cleanup; + } + + virCommandAddArgPair(cmd, "--srv-host", record); + VIR_FREE(record); + } + } } /* diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv new file mode 100644 index 0000000..021e8f0 --- /dev/null +++ b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv @@ -0,0 +1,16 @@ +/usr/sbin/dnsmasq \ +--strict-order \ +--bind-interfaces \ +--conf-file= \ +--except-interface lo \ +--srv-host=name.tcp.,,,, \ +--listen-address 192.168.122.1 \ +--listen-address 192.168.123.1 \ +--listen-address 2001:db8:ac10:fe01::1 \ +--listen-address 2001:db8:ac10:fd01::1 \ +--listen-address 10.24.10.1 \ +--dhcp-range 192.168.122.2,192.168.122.254 \ +--dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \ +--dhcp-lease-max=253 \ +--dhcp-no-override \ +--dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile\ diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.xml b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.xml new file mode 100644 index 0000000..e9b7680 --- /dev/null +++ b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record.argv b/tests/networkxml2argvdata/nat-network-dns-srv-record.argv new file mode 100644 index 0000000..85afbba --- /dev/null +++ b/tests/networkxml2argvdata/nat-network-dns-srv-record.argv @@ -0,0 +1,16 @@ +/usr/sbin/dnsmasq \ +--strict-order \ +--bind-interfaces \ +--conf-file= \ +--except-interface lo \ +--srv-host=name.tcp.test-domain-name,.,1024,10,10 \ +--listen-address 192.168.122.1 \ +--listen-address 192.168.123.1 \ +--listen-address 2001:db8:ac10:fe01::1 \ +--listen-address 2001:db8:ac10:fd01::1 \ +--listen-address 10.24.10.1 \ +--dhcp-range 192.168.122.2,192.168.122.254 \ +--dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \ +--dhcp-lease-max=253 \ +--dhcp-no-override \ +--dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile\ diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record.xml b/tests/networkxml2argvdata/nat-network-dns-srv-record.xml new file mode 100644 index 0000000..4be85b5 --- /dev/null +++ b/tests/networkxml2argvdata/nat-network-dns-srv-record.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' domain='test-domain-name' target='.' port='1024' priority='10' weight='10' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> diff --git a/tests/networkxml2argvtest.c b/tests/networkxml2argvtest.c index 4a11d6f..2dd9b7f 100644 --- a/tests/networkxml2argvtest.c +++ b/tests/networkxml2argvtest.c @@ -120,6 +120,8 @@ mymain(void) DO_TEST("netboot-network"); DO_TEST("netboot-proxy-network"); DO_TEST("nat-network-dns-txt-record"); + DO_TEST("nat-network-dns-srv-record"); + DO_TEST("nat-network-dns-srv-record-minimal"); DO_TEST("nat-network-dns-hosts"); return (ret==0 ? EXIT_SUCCESS : EXIT_FAILURE); diff --git a/tests/networkxml2xmlin/nat-network-dns-srv-record-minimal.xml b/tests/networkxml2xmlin/nat-network-dns-srv-record-minimal.xml new file mode 100644 index 0000000..e9b7680 --- /dev/null +++ b/tests/networkxml2xmlin/nat-network-dns-srv-record-minimal.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> diff --git a/tests/networkxml2xmlin/nat-network-dns-srv-record.xml b/tests/networkxml2xmlin/nat-network-dns-srv-record.xml new file mode 100644 index 0000000..4be85b5 --- /dev/null +++ b/tests/networkxml2xmlin/nat-network-dns-srv-record.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' domain='test-domain-name' target='.' port='1024' priority='10' weight='10' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> diff --git a/tests/networkxml2xmlout/nat-network-dns-srv-record-minimal.xml b/tests/networkxml2xmlout/nat-network-dns-srv-record-minimal.xml new file mode 100644 index 0000000..e9b7680 --- /dev/null +++ b/tests/networkxml2xmlout/nat-network-dns-srv-record-minimal.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> diff --git a/tests/networkxml2xmlout/nat-network-dns-srv-record.xml b/tests/networkxml2xmlout/nat-network-dns-srv-record.xml new file mode 100644 index 0000000..4be85b5 --- /dev/null +++ b/tests/networkxml2xmlout/nat-network-dns-srv-record.xml @@ -0,0 +1,26 @@ +<network> + <name>default</name> + <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid> + <forward dev='eth1' mode='nat'> + <interface dev='eth1'/> + </forward> + <bridge name='virbr0' stp='on' delay='0' /> + <dns> + <srv service='name' protocol='tcp' domain='test-domain-name' target='.' port='1024' priority='10' weight='10' /> + </dns> + <ip address='192.168.122.1' netmask='255.255.255.0'> + <dhcp> + <range start='192.168.122.2' end='192.168.122.254' /> + <host mac='00:16:3e:77:e2:ed' name='a.example.com' ip='192.168.122.10' /> + <host mac='00:16:3e:3e:a9:1a' name='b.example.com' ip='192.168.122.11' /> + </dhcp> + </ip> + <ip family='ipv4' address='192.168.123.1' netmask='255.255.255.0'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fe01::1' prefix='64'> + </ip> + <ip family='ipv6' address='2001:db8:ac10:fd01::1' prefix='64'> + </ip> + <ip family='ipv4' address='10.24.10.1'> + </ip> +</network> -- 1.7.7.3

3 3

[libvirt] [PATCH] qemu: Fix memory leaks
by ajia＠redhat.com 01 Jan '12

01 Jan '12

From: Alex Jia <ajia(a)redhat.com> Detected by Coverity. Leaks introduced in commit 93ab585 and commit e8d6b29. Signed-off-by: Alex Jia <ajia(a)redhat.com> --- src/qemu/qemu_driver.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index fbaa824..6a1e7cc 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6014,6 +6014,7 @@ static int qemuDomainSetBlkioParameters(virDomainPtr dom, } if (j != ndevices) { ret = -1; + VIR_FREE(devices); continue; } if (qemuDomainMergeDeviceWeights(&vm->def->blkio.devices, @@ -7867,7 +7868,7 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom, virDomainDefPtr persistentDef = NULL; int ret = -1; virDomainNetDefPtr net = NULL, persistentNet = NULL; - virNetDevBandwidthPtr bandwidth = NULL; + virNetDevBandwidthPtr bandwidth = NULL, newBandwidth = NULL; virCheckFlags(VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG, -1); @@ -7989,8 +7990,6 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom, } if (flags & VIR_DOMAIN_AFFECT_LIVE) { - virNetDevBandwidthPtr newBandwidth; - if (VIR_ALLOC(newBandwidth) < 0) { virReportOOMError(); goto cleanup; @@ -8056,6 +8055,7 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom, ret = 0; cleanup: virNetDevBandwidthFree(bandwidth); + virNetDevBandwidthFree(newBandwidth); virCgroupFree(&group); if (vm) virDomainObjUnlock(vm); -- 1.7.1

2 2

[libvirt] [PATCHv2 0/6] Expose per-disk label overrides.
by Eric Blake 31 Dec '11

31 Dec '11

In a system that uses dynamic_ownership=0 and NFS disks, the _only_ path in the virDomainDestroy path where libvirt itself performs a syscall on the NFS file system was on attempting to relabel a disk back to its default label. If an NFS server hosting a domain's disk image hangs, then this renders libvirtd stuck in an lstat() call, with the driver lock held, effectively blocking out _all_ other attempts to connect to libvirtd for any remaining domains not tied to the hung NFS server. (Verification that the SELinux relabel was the only point where libvirtd, rather than not qemu, could hang, was done by Red Hat VDSM folks in https://bugzilla.redhat.com/746666; with a hack to avoid the relabel, the destroy no longer hangs.) But without bleeding edge NFS servers, you can't put a SELinux label on the file in the first place; libvirt was happily ignoring the failure to change the label on domain start (thanks to the selinux virt_use_nfs bool), only to hang on the stuck server on domain destroy that it would have again ignored had the server not been stuck. If we allow the users to modify the XML to mark that a file does not need to be labeled in the first place, then we can avoid both attempts to label at startup and relabel at destroy, thus preventing libvirtd from getting stuck on a virDomainDestroy() called on a guest whose NFS server went down. This patch series is based on an earlier attempt (the hack which got tested in the above-mentioned bz 746666), incorporating feedback from Dan Berrange suggesting that the ability for the user to override labeling on a per-disk basis is smarter than marking ignored failure to label in internal XML used only by libvirtd: v1: https://www.redhat.com/archives/libvir-list/2011-December/msg00246.html I'm still working on patch 6/6 (actually hooking up the security manager to honor the relabel='no' request), and hope to post that tomorrow as part of this thread; that's really the only patch that resembles anything from v1 (the first 5 patches are basically brand new to this series), but I'm posting the first 5 patches now to get review started and make sure the proposed XML makes sense. I envision that this can be further expanded (sticking <seclabel> elements on more XML items that get labeled in the host), but for now I focused just on disk devices, as those are the most likely to reside over NFS. Ultimately, this patch series is only a bandaid; the underlying problem (making a syscall that can block indefinitely on a hung NFS server while holding the driver lock) is still present, and triggered if you have dynamic_ownership=1 (where we also attempt a chown of the disk image, regardless of the SELinux labels). Later down the road, I also plan to work on Dan's proposal to break the driver lock into smaller, more manageable sections, so we can get back to our documented goal of never blocking while holding lock, but instead using the job condition variables to detect when a single domain is stuck on a blocked call: https://www.redhat.com/archives/libvir-list/2011-November/msg00267.html Eric Blake (5): schema: rewrite seclabel rng to match code seclabel: refactor existing domain_conf usage seclabel: move seclabel stuff earlier seclabel: extend XML to allow per-disk label overrides seclabel: allow a seclabel override on a disk src docs/formatdomain.html.in | 29 ++- docs/schemas/domaincommon.rng | 115 +++++-- src/conf/domain_conf.c | 414 ++++++++++++-------- src/conf/domain_conf.h | 39 +- .../qemuxml2argv-seclabel-dynamic-baselabel.args | 4 + .../qemuxml2argv-seclabel-dynamic-baselabel.xml | 28 ++ .../qemuxml2argv-seclabel-dynamic-override.args | 5 + .../qemuxml2argv-seclabel-dynamic-override.xml | 40 ++ .../qemuxml2argv-seclabel-dynamic.args | 4 + .../qemuxml2argv-seclabel-dynamic.xml | 26 ++ .../qemuxml2argv-seclabel-static-relabel.args | 4 + .../qemuxml2argv-seclabel-static-relabel.xml | 29 ++ .../qemuxml2argv-seclabel-static.args | 4 + .../qemuxml2argv-seclabel-static.xml | 28 ++ tests/qemuxml2argvtest.c | 6 + tests/qemuxml2xmltest.c | 4 + 16 files changed, 575 insertions(+), 204 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic-baselabel.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic-baselabel.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic-override.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic-override.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-static-relabel.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-static-relabel.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-static.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-seclabel-static.xml -- 1.7.7.4

3 11