May 2015 - Devel - libvirt List Archives

[libvirt] [PATCH 0/8] virsh: kill blockJobImpl
by Peter Krempa 08 May '15

08 May '15

Move the code to appropriate parts to sanitize control flow. Peter Krempa (8): virsh: blockjob: Extract block job info code into a separate function virsh: cmdBlockJob: Switch to declarative flag interlocking virsh: blockjob: Split out vshBlockJobSetSpeed from blockJobImpl virsh: man: Add missing dashes for blockjob --bandwidth virsh: block job: Support --bytes and scaled integers when setting speed virsh: block job: separate abort from blockJobImpl virsh: Split out block pull implementation from blockJobImpl virsh: Kill blockJobImpl by moving the final impl into cmdBlockCommit tools/virsh-domain.c | 314 +++++++++++++++++++++++++++++---------------------- tools/virsh.pod | 14 ++- 2 files changed, 189 insertions(+), 139 deletions(-) -- 2.3.5

3 18

[libvirt] RFC Parallels driver renaming
by Maxim Nestratov 08 May '15

08 May '15

Hi all, You probably already know that our Parallels business devision responsible for Parallels Cloud Server, which is supported currently in libvirt as a "parallels" driver, was recently renamed to Odin [1]. As a part of this change our Parallels Cloud Server product name was also changed to Virtuozzo [2]. That said, we need to address this change in all publicly available products and projects and libvirt is not an exception. Thus, I intend to do the following renaming: 1. connection uri from "parallels" to "vz", 2. driver directory and source files from "parallels" to "vz", 3. internal names (function prefixes, variable and other names) from "parallels", "prl" to "vz". I would like to request for comments about proposed renamings, if they are affordable? If so, I will send the patch series shortly. Maxim Nestratov --- [1] http://www.odin.com/odin/ [2] http://www.odin.com/products/virtuozzo/#tab4

2 4

[libvirt] [PATCH] tests: Remove redundant aarch64 tests
by Cole Robinson 08 May '15

08 May '15

My commit 7b9de914 added some aarch64 CPU test cases. I wanted to test two different code paths but inadvertently added two of the same test cases. The second code path (using <cpu><model>host</model</cpu>) isn't easily exercised via the qemu tests anyways, I'll need to look elsewhere. Regardless, remove the redundant tests for now --- .../qemuxml2argv-aarch64-cpu-model-host.args | 5 ---- .../qemuxml2argv-aarch64-cpu-model-host.xml | 28 ---------------------- tests/qemuxml2argvtest.c | 3 --- .../qemuxml2argv-aarch64-cpu-passthrough.xml | 27 --------------------- tests/qemuxml2xmltest.c | 2 -- 5 files changed, 65 deletions(-) delete mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.args delete mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2argv-aarch64-cpu-passthrough.xml diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.args b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.args deleted file mode 100644 index 72e6526..0000000 --- a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.args +++ /dev/null @@ -1,5 +0,0 @@ -LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \ -/usr/bin/qemu-system-aarch64 -S -M virt -cpu host -m 1024 -smp 1 -nographic \ --nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait \ --boot c -usb -drive file=/aarch64.raw,if=none,id=drive-virtio-disk0 \ --device virtio-blk-device,drive=drive-virtio-disk0,id=virtio-disk0 diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.xml b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.xml deleted file mode 100644 index 53d528f..0000000 --- a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.xml +++ /dev/null @@ -1,28 +0,0 @@ -<domain type='kvm'> - <name>aarch64test</name> - <uuid>496d7ea8-9739-544b-4ebd-ef08be936e8b</uuid> - <memory unit='KiB'>1048576</memory> - <currentMemory unit='KiB'>1048576</currentMemory> - <vcpu placement='static'>1</vcpu> - <os> - <type arch='aarch64' machine='virt'>hvm</type> - <boot dev='hd'/> - </os> - <features> - <acpi/> - <apic/> - <pae/> - </features> - <cpu mode='host-passthrough'/> - <clock offset='utc'/> - <on_poweroff>destroy</on_poweroff> - <on_reboot>restart</on_reboot> - <on_crash>restart</on_crash> - <devices> - <emulator>/usr/bin/qemu-system-aarch64</emulator> - <disk type='file' device='disk'> - <source file='/aarch64.raw'/> - <target dev='vda' bus='virtio'/> - </disk> - </devices> -</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 97c7fba..aa15822 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -1538,9 +1538,6 @@ mymain(void) DO_TEST("aarch64-cpu-passthrough", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE, QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DEVICE_VIRTIO_MMIO, QEMU_CAPS_CPU_HOST, QEMU_CAPS_KVM); - DO_TEST("aarch64-cpu-model-host", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE, - QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DEVICE_VIRTIO_MMIO, - QEMU_CAPS_CPU_HOST, QEMU_CAPS_KVM); DO_TEST("aarch64-gic", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE, QEMU_CAPS_KVM); diff --git a/tests/qemuxml2xmloutdata/qemuxml2argv-aarch64-cpu-passthrough.xml b/tests/qemuxml2xmloutdata/qemuxml2argv-aarch64-cpu-passthrough.xml deleted file mode 100644 index 4cdf387..0000000 --- a/tests/qemuxml2xmloutdata/qemuxml2argv-aarch64-cpu-passthrough.xml +++ /dev/null @@ -1,27 +0,0 @@ -<domain type="kvm"> - <name>aarch64test</name> - <uuid>496d7ea8-9739-544b-4ebd-ef08be936e8b</uuid> - <memory>1048576</memory> - <currentMemory>1048576</currentMemory> - <vcpu placement='static'>1</vcpu> - <os> - <type arch="aarch64" machine="virt">hvm</type> - </os> - <features> - <acpi/> - <apic/> - <pae/> - </features> - <cpu mode='host-passthrough'/> - <clock offset="utc"/> - <on_poweroff>destroy</on_poweroff> - <on_reboot>restart</on_reboot> - <on_crash>restart</on_crash> - <devices> - <emulator>/usr/bin/qemu-system-aarch64</emulator> - <disk type='file' device='disk'> - <source file='/aarch64.raw'/> - <target dev='vda' bus='virtio'/> - </disk> - </devices> -</domain> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index b611afd..d418776 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -614,8 +614,6 @@ mymain(void) DO_TEST("memory-hotplug-nonuma"); DO_TEST("memory-hotplug-dimm"); - DO_TEST("aarch64-cpu-model-host"); - virObjectUnref(driver.caps); virObjectUnref(driver.xmlopt); -- 2.4.0

2 2

[libvirt] [PATCH 0/4] Enable support for s390 crypto key mgmt operations
by akrowiak＠linux.vnet.ibm.com 08 May '15

08 May '15

From: Tony Krowiak <akrowiak(a)linux.vnet.ibm.com> The IBM System z Central Processor Assist for Cryptographic Functions (CPACF) hardware provides a set of CPU instructions for use in clear-key encryption, pseudo random number generation, hash functions, and protected-key encryption. The CPACF protected key cryptographic functions operate with a protected key which is encrypted under a unique wrapping key that is stored in the Hardware System Area (HSA) of the machine and can only be accessed by firmware. The wrapping key cannot be accessed by the operating system or application programs. There are two wrapping keys: One for wrapping AES keys and one for wrapping DES/TDES keys. This patch set enables the support for encrypting clear keys under the AES and DES/TDES wrapping keys for guests started on hosts running on s390 hardware that supports key wrapping. Tony Krowiak (4): libvirt: docs: XML to enable/disable protected key mgmt ops libvirt: conf: parse XML for protected key management ops libvirt: qemu: enable/disable protected key management ops libvirt: tests: test protected key mgmt ops support

1 4

[libvirt] [PATCH] cpu_conf: properly escape characters for model and vendor
by Pavel Hrdina 08 May '15

08 May '15

We should escape strings for those two elements to be consistent along the whole XML. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1197580 Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com> --- src/conf/cpu_conf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c index e959ecc..34725c0 100644 --- a/src/conf/cpu_conf.c +++ b/src/conf/cpu_conf.c @@ -547,14 +547,14 @@ virCPUDefFormatBuf(virBufferPtr buf, virBufferAsprintf(buf, " vendor_id='%s'", def->vendor_id); } if (formatModel && def->model) { - virBufferAsprintf(buf, ">%s</model>\n", def->model); + virBufferEscapeString(buf, ">%s</model>\n", def->model); } else { virBufferAddLit(buf, "/>\n"); } } if (formatModel && def->vendor) - virBufferAsprintf(buf, "<vendor>%s</vendor>\n", def->vendor); + virBufferEscapeString(buf, "<vendor>%s</vendor>\n", def->vendor); if (def->sockets && def->cores && def->threads) { virBufferAddLit(buf, "<topology"); -- 2.3.6

2 2

[libvirt] [PATCH v2] processSerialChangedEvent: Close agent monitor early
by Michal Privoznik 07 May '15

07 May '15

https://bugzilla.redhat.com/show_bug.cgi?id=890648 So, imagine you've issued an API that involves guest agent. For instance, you want to query guest's IP addresses. So the API acquires QUERY_JOB, locks the guest agent and issues the agent command. However, for some reason, guest agent replies to initial ping correctly, but then crashes tragically while executing real command (in this case guest-network-get-interfaces). Since initial ping went well, libvirt thinks guest agent is accessible and awaits reply to the real command. But it will never come. What will is a monitor event. Our handler (processSerialChangedEvent) will try to acquire MODIFY_JOB, which will fail obviously because the other thread that's executing the API already holds a job. So the event handler exits early, and the QUERY_JOB is never released nor ended. The way how to solve this is to put flag somewhere in the monitor internals. The flag is called @running and agent commands are issued iff the flag is set. The flag itself is set when we connect to the agent socket. And unset whenever we see DISCONNECT event from the agent. Moreover, we must wake up all the threads waiting for the agent. This is done by signalizing the condition they're waiting on. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- diff to v1: - introduced @running flag to produce prettier error message src/qemu/qemu_agent.c | 53 ++++++++++++++++++++++++++++++++++++++++++-------- src/qemu/qemu_agent.h | 2 ++ src/qemu/qemu_driver.c | 8 ++++++++ 3 files changed, 55 insertions(+), 8 deletions(-) diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index 3f6a9bf..fc23c41 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -92,6 +92,7 @@ struct _qemuAgent { int watch; bool connectPending; + bool running; virDomainObjPtr vm; @@ -772,6 +773,7 @@ qemuAgentOpen(virDomainObjPtr vm, goto cleanup; } + mon->running = true; VIR_DEBUG("New mon %p fd =%d watch=%d", mon, mon->fd, mon->watch); return mon; @@ -788,6 +790,36 @@ qemuAgentOpen(virDomainObjPtr vm, } +static void +qemuAgentNotifyCloseLocked(qemuAgentPtr mon) +{ + if (mon) { + mon->running = false; + + /* If there is somebody waiting for a message + * wake him up. No message will arrive anyway. */ + if (mon->msg && !mon->msg->finished) { + mon->msg->finished = 1; + virCondSignal(&mon->notify); + } + } +} + + +void +qemuAgentNotifyClose(qemuAgentPtr mon) +{ + if (!mon) + return; + + VIR_DEBUG("mon=%p", mon); + + virObjectLock(mon); + qemuAgentNotifyCloseLocked(mon); + virObjectUnlock(mon); +} + + void qemuAgentClose(qemuAgentPtr mon) { if (!mon) @@ -803,12 +835,7 @@ void qemuAgentClose(qemuAgentPtr mon) VIR_FORCE_CLOSE(mon->fd); } - /* If there is somebody waiting for a message - * wake him up. No message will arrive anyway. */ - if (mon->msg && !mon->msg->finished) { - mon->msg->finished = 1; - virCondSignal(&mon->notify); - } + qemuAgentNotifyCloseLocked(mon); virObjectUnlock(mon); virObjectUnref(mon); @@ -1087,6 +1114,12 @@ qemuAgentCommand(qemuAgentPtr mon, *reply = NULL; + if (!mon->running) { + virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s", + _("Guest agent disappeared while executing command")); + return -1; + } + if (qemuAgentGuestSync(mon) < 0) return -1; @@ -1112,8 +1145,12 @@ qemuAgentCommand(qemuAgentPtr mon, if (await_event && !needReply) { VIR_DEBUG("Woken up by event %d", await_event); } else { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("Missing monitor reply object")); + if (mon->running) + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Missing monitor reply object")); + else + virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s", + _("Guest agent disappeared while executing command")); ret = -1; } } else { diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h index 1cd5749..988228b 100644 --- a/src/qemu/qemu_agent.h +++ b/src/qemu/qemu_agent.h @@ -49,6 +49,8 @@ qemuAgentPtr qemuAgentOpen(virDomainObjPtr vm, void qemuAgentClose(qemuAgentPtr mon); +void qemuAgentNotifyClose(qemuAgentPtr mon); + typedef enum { QEMU_AGENT_EVENT_NONE = 0, QEMU_AGENT_EVENT_SHUTDOWN, diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 537797e..f40ccae 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4480,6 +4480,14 @@ processSerialChangedEvent(virQEMUDriverPtr driver, VIR_DEBUG("Changing serial port state %s in domain %p %s", devAlias, vm, vm->def->name); + if (newstate == VIR_DOMAIN_CHR_DEVICE_STATE_DISCONNECTED && + virDomainObjIsActive(vm) && priv->agent) { + /* Close agent monitor early, so that other threads + * waiting for the agent to reply can finish and our + * job we acquire below can succeed. */ + qemuAgentNotifyClose(priv->agent); + } + if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) goto cleanup; -- 2.3.6

2 2

[libvirt] storage volume download/upload
by Vasiliy Tolstov 07 May '15

07 May '15

As i see in some cases, for example in case of lvm storage pool libvirt spawns libvirt_iohelper to upload or download data to volume. But in case of big data contains zeroes this is wast bw of network. May be we can use gzip or lz4 for compression stream? How the best do this not breaking exiting software? May be add new parameter to libvirt_iohelper with compression method and compression level? In my cases of 20-160 Gb data and used only 4-5 Gb this provide major benefit.... Thanks! -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

2 4

[libvirt] [RFC PATCH] network: add an option to disable dnsmasq's bind-dynamic
by Cédric Bosdonnat 07 May '15

07 May '15

When building vlans on top of veth networks, dnsmasq doesn't catch DNS requests on the vlans interfaces. Allowing to disable the bind-dynamic helps this use case. --- src/conf/network_conf.c | 12 ++++++++++++ src/conf/network_conf.h | 1 + src/network/bridge_driver.c | 3 ++- 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c index f4a9df0..63e26e1 100644 --- a/src/conf/network_conf.c +++ b/src/conf/network_conf.c @@ -1987,6 +1987,7 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt) xmlNodePtr forwardNode = NULL; char *ipv6nogwStr = NULL; char *trustGuestRxFilters = NULL; + char *binddynamicStr = NULL; xmlNodePtr save = ctxt->node; xmlNodePtr bandwidthNode = NULL; xmlNodePtr vlanNode; @@ -2049,6 +2050,16 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt) VIR_FREE(trustGuestRxFilters); } + /* Default for binddynamic is on */ + def->binddynamic = true; + binddynamicStr = virXPathString("string(./@binddynamic)", ctxt); + if (binddynamicStr) { + if (STRNEQ(binddynamicStr, "no")) { + def->binddynamic = false; + } + VIR_FREE(binddynamicStr); + } + /* Parse network domain information */ def->domain = virXPathString("string(./domain[1]/@name)", ctxt); tmp = virXPathString("string(./domain[1]/@localOnly)", ctxt); @@ -2326,6 +2337,7 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt) VIR_FREE(ipNodes); VIR_FREE(portGroupNodes); VIR_FREE(ipv6nogwStr); + VIR_FREE(binddynamicStr); VIR_FREE(trustGuestRxFilters); ctxt->node = save; return NULL; diff --git a/src/conf/network_conf.h b/src/conf/network_conf.h index f69d999..163581e 100644 --- a/src/conf/network_conf.h +++ b/src/conf/network_conf.h @@ -253,6 +253,7 @@ struct _virNetworkDef { virNetDevBandwidthPtr bandwidth; virNetDevVlan vlan; int trustGuestRxFilters; /* enum virTristateBool */ + bool binddynamic; /* to force off bind_dynamic option of dnsmasq */ }; typedef struct _virNetworkObj virNetworkObj; diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index d195085..5dddc4b 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -988,7 +988,8 @@ networkDnsmasqConfContents(virNetworkObjPtr network, /* dnsmasq will *always* listen on localhost unless told otherwise */ virBufferAddLit(&configbuf, "except-interface=lo\n"); - if (dnsmasqCapsGet(caps, DNSMASQ_CAPS_BIND_DYNAMIC)) { + if (network->def->binddynamic && + dnsmasqCapsGet(caps, DNSMASQ_CAPS_BIND_DYNAMIC)) { /* using --bind-dynamic with only --interface (no * --listen-address) prevents dnsmasq from responding to dns * queries that arrive on some interface other than our bridge -- 2.1.4

3 2

[libvirt] [PATCH] caps: Don't default to i686 of KVM on x86_64
by Cole Robinson 07 May '15

07 May '15

My commit 747761a79 (v1.2.15 only) dropped this bit of logic when filling in a default arch in the XML: - /* First try to find one matching host arch */ - for (i = 0; i < caps->nguests; i++) { - if (caps->guests[i]->ostype == ostype) { - for (j = 0; j < caps->guests[i]->arch.ndomains; j++) { - if (caps->guests[i]->arch.domains[j]->type == domain && - caps->guests[i]->arch.id == caps->host.arch) - return caps->guests[i]->arch.id; - } - } - } That attempt to match host.arch is important, otherwise we end up defaulting to i686 on x86_64 host for KVM, which is not intended. Duplicate it in the centralized CapsLookup function. Additionally add some testcases that would have caught this. https://bugzilla.redhat.com/show_bug.cgi?id=1219191 --- src/conf/capabilities.c | 63 +++++++++++++++------- .../qemuxml2argv-default-kvm-host-arch.args | 4 ++ .../qemuxml2argv-default-kvm-host-arch.xml | 11 ++++ tests/qemuxml2argvtest.c | 1 + .../qemuxml2xmlout-default-kvm-host-arch.xml | 21 ++++++++ tests/qemuxml2xmltest.c | 1 + tests/testutilsqemu.c | 12 +++++ 7 files changed, 94 insertions(+), 19 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-default-kvm-host-arch.xml diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c index 922741f..c43bfb3 100644 --- a/src/conf/capabilities.c +++ b/src/conf/capabilities.c @@ -607,25 +607,13 @@ virCapsDomainDataCompare(virCapsGuestPtr guest, return true; } -/** - * virCapabilitiesDomainDataLookup: - * @caps: capabilities to query - * @ostype: guest operating system type, of enum VIR_DOMAIN_OSTYPE - * @arch: Architecture to search for - * @domaintype: domain type to search for, of enum VIR_DOMAIN_VIRT - * @emulator: Emulator path to search for - * @machinetype: Machine type to search for - * - * Search capabilities for the passed values, and if found return - * virCapabilitiesDomainDataLookup filled in with the default values - */ -virCapsDomainDataPtr -virCapabilitiesDomainDataLookup(virCapsPtr caps, - int ostype, - virArch arch, - int domaintype, - const char *emulator, - const char *machinetype) +static virCapsDomainDataPtr +virCapabilitiesDomainDataLookupInternal(virCapsPtr caps, + int ostype, + virArch arch, + int domaintype, + const char *emulator, + const char *machinetype) { virCapsGuestPtr foundguest = NULL; virCapsGuestDomainPtr founddomain = NULL; @@ -730,6 +718,43 @@ virCapabilitiesDomainDataLookup(virCapsPtr caps, return ret; } +/** + * virCapabilitiesDomainDataLookup: + * @caps: capabilities to query + * @ostype: guest operating system type, of enum VIR_DOMAIN_OSTYPE + * @arch: Architecture to search for + * @domaintype: domain type to search for, of enum VIR_DOMAIN_VIRT + * @emulator: Emulator path to search for + * @machinetype: Machine type to search for + * + * Search capabilities for the passed values, and if found return + * virCapabilitiesDomainDataLookup filled in with the default values + */ +virCapsDomainDataPtr +virCapabilitiesDomainDataLookup(virCapsPtr caps, + int ostype, + virArch arch, + int domaintype, + const char *emulator, + const char *machinetype) +{ + virCapsDomainDataPtr ret; + + if (arch == VIR_ARCH_NONE) { + /* Prefer host arch if its available */ + ret = virCapabilitiesDomainDataLookupInternal(caps, ostype, + caps->host.arch, + domaintype, + emulator, machinetype); + if (ret) + return ret; + } + + return virCapabilitiesDomainDataLookupInternal(caps, ostype, + arch, domaintype, + emulator, machinetype); +} + static int virCapabilitiesFormatNUMATopology(virBufferPtr buf, size_t ncells, diff --git a/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.args b/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.args new file mode 100644 index 0000000..102691f --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.args @@ -0,0 +1,4 @@ +LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \ +/usr/bin/kvm -S -machine pc,accel=kvm -m 4096 -smp 4 -nographic \ +-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb -net none \ +-serial none -parallel none diff --git a/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.xml b/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.xml new file mode 100644 index 0000000..66dead0 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-default-kvm-host-arch.xml @@ -0,0 +1,11 @@ +<domain type='kvm'> + <name>kvm</name> + <uuid>d091ea82-29e6-2e34-3005-f02617b36e87</uuid> + <memory unit='KiB'>4194304</memory> + <currentMemory unit='KiB'>4194304</currentMemory> + <vcpu placement='static'>4</vcpu> + <os> + <type>hvm</type> + <boot dev='hd'/> + </os> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 97c7fba..b27e3a4 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -599,6 +599,7 @@ mymain(void) DO_TEST_FAILURE("machine-xen-vmport-opt", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_MACHINE_VMPORT_OPT); DO_TEST("kvm", QEMU_CAPS_MACHINE_OPT); + DO_TEST("default-kvm-host-arch", QEMU_CAPS_MACHINE_OPT); DO_TEST("boot-cdrom", NONE); DO_TEST("boot-network", NONE); DO_TEST("boot-floppy", NONE); diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-default-kvm-host-arch.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-default-kvm-host-arch.xml new file mode 100644 index 0000000..30fa66d --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-default-kvm-host-arch.xml @@ -0,0 +1,21 @@ +<domain type='kvm'> + <name>kvm</name> + <uuid>d091ea82-29e6-2e34-3005-f02617b36e87</uuid> + <memory unit='KiB'>4194304</memory> + <currentMemory unit='KiB'>4194304</currentMemory> + <vcpu placement='static'>4</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/kvm</emulator> + <controller type='usb' index='0'/> + <controller type='pci' index='0' model='pci-root'/> + <memballoon model='virtio'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index b611afd..a21a299 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -346,6 +346,7 @@ mymain(void) DO_TEST("minimal"); DO_TEST("machine-core-on"); DO_TEST("machine-core-off"); + DO_TEST_DIFFERENT("default-kvm-host-arch"); DO_TEST("boot-cdrom"); DO_TEST("boot-network"); DO_TEST("boot-floppy"); diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c index 14743be..d067bca 100644 --- a/tests/testutilsqemu.c +++ b/tests/testutilsqemu.c @@ -354,6 +354,18 @@ virCapsPtr testQemuCapsInit(void) NULL) == NULL) goto cleanup; + if ((machines = testQemuAllocMachines(&nmachines)) == NULL) + goto cleanup; + + if (virCapabilitiesAddGuestDomain(guest, + VIR_DOMAIN_VIRT_KVM, + "/usr/bin/qemu-kvm", + NULL, + nmachines, + machines) == NULL) + goto cleanup; + machines = NULL; + if ((machines = testQemuAllocNewerMachines(&nmachines)) == NULL) goto cleanup; -- 2.4.0

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[libvirt] [PATCH] processSerialChangedEvent: Close agent monitor early
by Michal Privoznik 07 May '15

07 May '15

https://bugzilla.redhat.com/show_bug.cgi?id=890648 So, imagine you've issued an API that involves guest agent. For instance, you want to query guest's IP addresses. So the API acquires QUERY_JOB, locks the guest agent and issues the agemt command. However, for some reason, guest agent replies to initial ping correctly, but then crashes tragically while executing real command (in this case guest-network-get-interfaces). Since initial ping went well, libvirt thinks guest agent is accessible and awaits reply to the real command. But it will never come. What will is a monitor event. Our handler (processSerialChangedEvent) will try to acquire MODIFY_JOB, which will fail obviously because the other thread that's executing the API already holds a job. So the event handler exits early, and the QUERY_JOB is never released nor ended. I don't understand why, but qemu should in fact instead of sending a event on the monitor close the socket. But leave that for a different discussion. Since qemu is not doing that, we must work around it and close and unregister the agent's FD from the even loop ourselves. This will wake up all callers stuck in waiting for agent's reply. Hopefully, it will make them finish the job too and even handler can acquire its job later. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- src/qemu/qemu_driver.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index d173aa1..becb6ae 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4480,6 +4480,14 @@ processSerialChangedEvent(virQEMUDriverPtr driver, VIR_DEBUG("Changing serial port state %s in domain %p %s", devAlias, vm, vm->def->name); + if (newstate == VIR_DOMAIN_CHR_DEVICE_STATE_DISCONNECTED && + virDomainObjIsActive(vm) && priv->agent) { + /* Close agent monitor early, so that other threads + * waiting for the agent to reply can finish and our + * job we acquire below can succeed. */ + qemuAgentClose(priv->agent); + } + if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) goto cleanup; @@ -4508,7 +4516,6 @@ processSerialChangedEvent(virQEMUDriverPtr driver, } } else { if (priv->agent) { - qemuAgentClose(priv->agent); priv->agent = NULL; priv->agentError = false; } -- 2.3.6

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