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[libvirt] oVirt considers using macTableManager='libvirt'
by Ido Barkan 02 Feb '16

02 Feb '16

Hi guys, We, at oVirt, are considring using the automatic bridge management feature of libvirt for our hosts (macTableManager='libvirt'). I could find any discussion in the mailing list archives about the motivation for this feature. (was there?). If there wasn't I would like to start a new one, about the possible trade offs it would have in oVirt. Specifically I have a few questions: 1) The obvious performance motivation is clear: considering N hosts with M vms each connected to the same LAN, the first packet to any unknown yet host will flood all the vms in all N bridges. -- was there any other motivation that I do not understand (apart from slightly better security? 2) oVirt uses TC for port mirroring, in case this is requested by users, to mirror traffic from a chosen bridge to a chosen NIC in the host. I could not understand if macTableManager will interfere with it, or not. 3) Are there any drawbacks to enabling this feature? 4) We aim for rhel7.2. Will the feature be supported (or partially supported) for kernels older then 3.17? And if so, in what way? 5) oVirt currently builds its own bridges and tell libvirt about them. Does that have any affect on the functionality of that feature? 6) are there any plans to support OVS for this feature in the future? -- Thanks, Ido Barkan

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[libvirt] [PATCH] conf: qemu: Add support for more HyperV Enlightenment features
by Maxim Nestratov 02 Feb '16

02 Feb '16

This patch adds support for "vpindex", "runtime", "synic" and "stimer" features available in qemu 2.5+. - When Hyper-V "vpindex" is on, guest can use MSR HV_X64_MSR_VP_INDEX to get virtual processor ID. - Hyper-V "runtime" enlightement feature allows to use MSR HV_X64_MSR_VP_RUNTIME to get the time the virtual processor consumes running guest code, as well as the time the hypervisor spends running code on behalf of that guest. - Hyper-V "synic" stands for Synthetic Interrupt Controller, which is lapic extension controlled via MSRs. - Hyper-V "stimer" switches on Hyper-V SynIC timers MSR's support. Guest can setup and use fired by host events (SynIC interrupt and appropriate timer expiration message) as guest clock events Signed-off-by: Maxim Nestratov <mnestratov(a)virtuozzo.com> --- docs/formatdomain.html.in | 28 ++++++++++++++++++++++ docs/schemas/domaincommon.rng | 20 ++++++++++++++++ src/conf/domain_conf.c | 18 +++++++++++++- src/conf/domain_conf.h | 4 ++++ src/qemu/qemu_command.c | 8 +++++++ tests/qemuxml2argvdata/qemuxml2argv-hyperv-off.xml | 4 ++++ tests/qemuxml2argvdata/qemuxml2argv-hyperv.args | 2 +- tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml | 4 ++++ 8 files changed, 86 insertions(+), 2 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index b3187bb..3edd0a2 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1460,6 +1460,10 @@ <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='4096'/> + <vpindex state='on'/> + <runtime state='on'/> + <synic state='on'/> + <stimer state='on'/> </hyperv> <kvm> <hidden state='on'/> @@ -1535,6 +1539,30 @@ <td>on, off; retries - at least 4095</td> <td>1.1.0 (QEMU only)</td> </tr> + <tr> + <td>vpindex</td> + <td>Virtual processor index</td> + <td> on, off</td> + <td>2.5.0 (QEMU only)</td> + </tr> + <tr> + <td>runtime</td> + <td>Processor time spent on running guest code and on behalf of guest code</td> + <td> on, off</td> + <td>2.5.0 (QEMU only)</td> + </tr> + <tr> + <td>synic</td> + <td>Enable Synthetic Interrupt Controller (SyNIC)</td> + <td> on, off</td> + <td>2.5.0 (QEMU only)</td> + </tr> + <tr> + <td>stimer</td> + <td>Enable SyNIC timers</td> + <td> on, off</td> + <td>2.5.0 (QEMU only)</td> + </tr> </table> </dd> <dt><code>pvspinlock</code></dt> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 5deb17b..e079e86 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -4858,6 +4858,26 @@ </optional> </element> </optional> + <optional> + <element name="vpindex"> + <ref name="featurestate"/> + </element> + </optional> + <optional> + <element name="runtime"> + <ref name="featurestate"/> + </element> + </optional> + <optional> + <element name="synic"> + <ref name="featurestate"/> + </element> + </optional> + <optional> + <element name="stimer"> + <ref name="featurestate"/> + </element> + </optional> </interleave> </element> </define> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 1ea74a6..bbc14fd 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -145,7 +145,11 @@ VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, VIR_DOMAIN_CAPABILITIES_POLICY_LAST, VIR_ENUM_IMPL(virDomainHyperv, VIR_DOMAIN_HYPERV_LAST, "relaxed", "vapic", - "spinlocks") + "spinlocks", + "vpindex", + "runtime", + "synic", + "stimer") VIR_ENUM_IMPL(virDomainKVM, VIR_DOMAIN_KVM_LAST, "hidden") @@ -15460,6 +15464,10 @@ virDomainDefParseXML(xmlDocPtr xml, switch ((virDomainHyperv) feature) { case VIR_DOMAIN_HYPERV_RELAXED: case VIR_DOMAIN_HYPERV_VAPIC: + case VIR_DOMAIN_HYPERV_VPINDEX: + case VIR_DOMAIN_HYPERV_RUNTIME: + case VIR_DOMAIN_HYPERV_SYNIC: + case VIR_DOMAIN_HYPERV_STIMER: if (!(tmp = virXPathString("string(./@state)", ctxt))) { virReportError(VIR_ERR_XML_ERROR, _("missing 'state' attribute for " @@ -17508,6 +17516,10 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src, switch ((virDomainHyperv) i) { case VIR_DOMAIN_HYPERV_RELAXED: case VIR_DOMAIN_HYPERV_VAPIC: + case VIR_DOMAIN_HYPERV_VPINDEX: + case VIR_DOMAIN_HYPERV_RUNTIME: + case VIR_DOMAIN_HYPERV_SYNIC: + case VIR_DOMAIN_HYPERV_STIMER: if (src->hyperv_features[i] != dst->hyperv_features[i]) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("State of HyperV enlightenment " @@ -22099,6 +22111,10 @@ virDomainDefFormatInternal(virDomainDefPtr def, switch ((virDomainHyperv) j) { case VIR_DOMAIN_HYPERV_RELAXED: case VIR_DOMAIN_HYPERV_VAPIC: + case VIR_DOMAIN_HYPERV_VPINDEX: + case VIR_DOMAIN_HYPERV_RUNTIME: + case VIR_DOMAIN_HYPERV_SYNIC: + case VIR_DOMAIN_HYPERV_STIMER: if (def->hyperv_features[j]) virBufferAsprintf(buf, "<%s state='%s'/>\n", virDomainHypervTypeToString(j), diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 0141009..c96e0c4 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1700,6 +1700,10 @@ typedef enum { VIR_DOMAIN_HYPERV_RELAXED = 0, VIR_DOMAIN_HYPERV_VAPIC, VIR_DOMAIN_HYPERV_SPINLOCKS, + VIR_DOMAIN_HYPERV_VPINDEX, + VIR_DOMAIN_HYPERV_RUNTIME, + VIR_DOMAIN_HYPERV_SYNIC, + VIR_DOMAIN_HYPERV_STIMER, VIR_DOMAIN_HYPERV_LAST } virDomainHyperv; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 5d3ab3a..fc55a82 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -7739,6 +7739,10 @@ qemuBuildCpuArgStr(virQEMUDriverPtr driver, switch ((virDomainHyperv) i) { case VIR_DOMAIN_HYPERV_RELAXED: case VIR_DOMAIN_HYPERV_VAPIC: + case VIR_DOMAIN_HYPERV_VPINDEX: + case VIR_DOMAIN_HYPERV_RUNTIME: + case VIR_DOMAIN_HYPERV_SYNIC: + case VIR_DOMAIN_HYPERV_STIMER: if (def->hyperv_features[i] == VIR_TRISTATE_SWITCH_ON) virBufferAsprintf(&buf, ",hv_%s", virDomainHypervTypeToString(i)); @@ -12790,6 +12794,10 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, switch ((virDomainHyperv) f) { case VIR_DOMAIN_HYPERV_RELAXED: case VIR_DOMAIN_HYPERV_VAPIC: + case VIR_DOMAIN_HYPERV_VPINDEX: + case VIR_DOMAIN_HYPERV_RUNTIME: + case VIR_DOMAIN_HYPERV_SYNIC: + case VIR_DOMAIN_HYPERV_STIMER: if (value) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("HyperV feature '%s' should not " diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hyperv-off.xml b/tests/qemuxml2argvdata/qemuxml2argv-hyperv-off.xml index 1067f64..438f4a5 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hyperv-off.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-hyperv-off.xml @@ -14,6 +14,10 @@ <relaxed state='off'/> <vapic state='off'/> <spinlocks state='off'/> + <vpindex state='off'/> + <runtime state='off'/> + <synic state='off'/> + <stimer state='off'/> </hyperv> </features> <clock offset='utc'/> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args index a6f37e3..e4b2af5 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args @@ -8,7 +8,7 @@ QEMU_AUDIO_DRV=none \ -name QEMUGuest1 \ -S \ -M pc \ --cpu qemu32,hv_relaxed,hv_vapic,hv_spinlocks=0x2fff \ +-cpu qemu32,hv_relaxed,hv_vapic,hv_spinlocks=0x2fff,hv_vpindex,hv_runtime,hv_synic,hv_stimer \ -m 214 \ -smp 6 \ -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml index 2b8f332..2844b24 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml @@ -14,6 +14,10 @@ <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='12287'/> + <vpindex state='on'/> + <runtime state='on'/> + <synic state='on'/> + <stimer state='on'/> </hyperv> </features> <clock offset='utc'/> -- 1.8.3.1

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[libvirt] [PATCH v2 0/6] Some logical pool/volume changes
by John Ferlan 02 Feb '16

02 Feb '16

v1: http://www.redhat.com/archives/libvir-list/2016-January/msg01023.html Differences to v1: Patch 1 is the former patch 2 with the following adjuments: - Change helper name to be virStorageBackendLogicalParseVolExtents - Include all 'extent' parsing needs - including fetch/parse of 'stripes' to determine 'nextents' value, allocation of vol->source.extents, parse of groups[6] to be 'length', parse of groups[7] to be 'size' Patch 2 is new, but replaces some of the concepts from patch 3: - I rototilled the virStorageBackendLogicalParseVolExtents to remove the unnecessary trip through regex/regcomp. - Used virStringSplitCount instread and then parse the resultant string. - Removed the need for the 'stripes' fetch since it really wasn't doing what it was supposed to. - I adjusted the virstringtest to exhibit what is being parsed (it can be removed if you think that's excessive). Patches 3-5 are new - These could be combined. I left them separate to show the process... - Essentially adding a new "source" field to be used to display in the vol-dumpxml output Patch 6 is part of the old patch 4: - Since the old patch 3 isn't necessary - it's essentially gone. This just takes the patch 4 concept of changing the regex, but also applies it to the current code. John Ferlan (6): logical: Create helper virStorageBackendLogicalParseVolExtents logical: Fix parsing of the 'devices' field lvs output logical: Search for a segtype of "thin" and mark lv as sparse vol: Add thin_pool to _virStorageVolSource logical: Add capability to get the thin pool name logical: Display thin lv's found in a libvirt managed volume group docs/formatstorage.html.in | 9 +- src/conf/storage_conf.c | 5 + src/conf/storage_conf.h | 1 + src/storage/storage_backend_logical.c | 221 ++++++++++++++++------------------ tests/virstringtest.c | 11 ++ 5 files changed, 127 insertions(+), 120 deletions(-) -- 2.5.0

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Re: [libvirt] [PATCH] virt-aa-helper: better write denials handling
by Guido Günther 02 Feb '16

02 Feb '16

Hi, On Mon, Jan 18, 2016 at 01:45:08PM +0100, Cédric Bosdonnat wrote: > Better fix replacing c726af2d: introducing an 'R' permission to > add read rule, but no explicit deny write rule. > --- > src/security/virt-aa-helper.c | 20 +++++++++++++++++--- > 1 file changed, 17 insertions(+), 3 deletions(-) > > diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c > index a2d7226..d0c5246 100644 > --- a/src/security/virt-aa-helper.c > +++ b/src/security/virt-aa-helper.c > @@ -785,12 +785,18 @@ get_definition(vahControl * ctl, const char *xmlStr) > return rc; > } > > +/** > + * The permissions allowed are apparmor valid permissions and 'R'. 'R' stands for > + * read with no explicit deny rule. > + */ > static int > vah_add_path(virBufferPtr buf, const char *path, const char *perms, bool recursive) > { > char *tmp = NULL; > int rc = -1; > bool readonly = true; > + bool explicit_deny_rule = true; > + char *sub = NULL; > > if (path == NULL) > return rc; > @@ -815,8 +821,16 @@ vah_add_path(virBufferPtr buf, const char *path, const char *perms, bool recursi > return rc; > } > > - if (strchr(perms, 'w') != NULL) > + if (strchr(perms, 'w') != NULL) { > readonly = false; > + explicit_deny_rule = false; > + } > + > + if ((sub = strchr(perms, 'R')) != NULL) { > + /* Don't write the invalid R permission, replace it with 'r' */ > + sub[0] = 'r'; > + explicit_deny_rule = false; > + } > > rc = valid_path(tmp, readonly); > if (rc != 0) { > @@ -831,7 +845,7 @@ vah_add_path(virBufferPtr buf, const char *path, const char *perms, bool recursi > tmp[strlen(tmp) - 1] = '\0'; > > virBufferAsprintf(buf, " \"%s%s\" %s,\n", tmp, recursive ? "/**" : "", perms); > - if (readonly) { > + if (explicit_deny_rule) { > virBufferAddLit(buf, " # don't audit writes to readonly files\n"); > virBufferAsprintf(buf, " deny \"%s%s\" w,\n", tmp, recursive ? "/**" : ""); > } > @@ -1130,7 +1144,7 @@ get_files(vahControl * ctl) > /* We don't need to add deny rw rules for readonly mounts, > * this can only lead to troubles when mounting / readonly. > */ > - if (vah_add_path(&buf, fs->src, "rw", true) != 0) > + if (vah_add_path(&buf, fs->src, fs->readonly ? "R" : "rw", true) != 0) > goto cleanup; > } > } this looks good to me but it would be great to have Jamie's input on that. Ceers, -- Guido

1 0

[libvirt] [PATCH] tests: avoid realpath in test-lib.sh
by Eric Blake 01 Feb '16

01 Feb '16

Ever since commit ace4aecd, running 'make check' on RHEL 6 produces: ./test-lib.sh: line 21: realpath: command not found for every shell script test, because 'realpath' was not part of coreutils back then. * tests/test-lib.sh (_scriptdir): Compute with only portable shell. Signed-off-by: Eric Blake <eblake(a)redhat.com> --- A warning message is cosmetic, and not quite a build-breaker, so I'll wait for a review before pushing this. tests/test-lib.sh | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/test-lib.sh b/tests/test-lib.sh index 920b01e..8e0ce83 100644 --- a/tests/test-lib.sh +++ b/tests/test-lib.sh @@ -1,6 +1,6 @@ # test-lib.sh: source this file; set up for tests -# Copyright (C) 2008-2013 Red Hat, Inc. +# Copyright (C) 2008-2013, 2016 Red Hat, Inc. # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public @@ -18,7 +18,7 @@ # # Based on an idea from GNU coreutils -_scriptdir="$(realpath $(dirname $0))" +_scriptdir="$(unset CDPATH; cd $(dirname $0) && pwd)" test -z "$abs_srcdir" && abs_srcdir=$_scriptdir test -z "$abs_builddir" && abs_builddir=$_scriptdir test -z "$abs_top_srcdir" && abs_top_srcdir=$_scriptdir/.. -- 1.7.1

2 1

[libvirt] [PATCH v3 0/4] virshBlockJobWait improvements
by Michael Chapman 01 Feb '16

01 Feb '16

v2 discussion at: http://www.redhat.com/archives/libvir-list/2016-January/msg01063.html As requested I've split this into separate commits. All of the comment nitpicks have been applied. With regards to using "break" or "goto cleanup" to exit the loop, I decided to use "goto" on all the error cases and "break" everywhere else. I had noticed another bug where the SIGINT signal action wasn't reset if the virTimeMillisNow() call failed; that's fixed in patch 3 in this series. Michael Chapman (4): virsh: avoid unnecessary progress updates virsh: be consistent with style of loop exit virsh: ensure SIGINT action is reset on all errors virsh: improve waiting for block job readiness tools/virsh-domain.c | 65 ++++++++++++++++++++++++++++++---------------------- 1 file changed, 37 insertions(+), 28 deletions(-) -- 2.4.3

2 8

[libvirt] [PATCH] qemu: Mark some functions as static
by Cole Robinson 01 Feb '16

01 Feb '16

--- src/qemu/qemu_command.c | 16 +++++++++++++--- src/qemu/qemu_command.h | 11 ----------- src/qemu/qemu_process.h | 2 -- 3 files changed, 13 insertions(+), 16 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 5d3ab3a..8943270 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1775,6 +1775,16 @@ qemuDomainPCIBusFullyReserved(virDomainPCIAddressBusPtr bus) } +static int +qemuAssignDevicePCISlots(virDomainDefPtr def, + virQEMUCapsPtr qemuCaps, + virDomainPCIAddressSetPtr addrs); +static int +qemuDomainAssignPCIAddresses(virDomainDefPtr def, + virQEMUCapsPtr qemuCaps, + virDomainObjPtr obj); + + int qemuDomainAssignAddresses(virDomainDefPtr def, virQEMUCapsPtr qemuCaps, virDomainObjPtr obj) @@ -1801,7 +1811,7 @@ int qemuDomainAssignAddresses(virDomainDefPtr def, } -virDomainPCIAddressSetPtr +static virDomainPCIAddressSetPtr qemuDomainPCIAddressSetCreate(virDomainDefPtr def, unsigned int nbuses, bool dryRun) @@ -2238,7 +2248,7 @@ qemuValidateDevicePCISlotsChipsets(virDomainDefPtr def, return 0; } -int +static int qemuDomainAssignPCIAddresses(virDomainDefPtr def, virQEMUCapsPtr qemuCaps, virDomainObjPtr obj) @@ -2451,7 +2461,7 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def, * function must only try to reserve addresses if info.type == NONE and * skip over info.type == PCI */ -int +static int qemuAssignDevicePCISlots(virDomainDefPtr def, virQEMUCapsPtr qemuCaps, virDomainPCIAddressSetPtr addrs) diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index a96e57d..53bfda5 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -274,17 +274,6 @@ void qemuDomainReleaseDeviceAddress(virDomainObjPtr vm, const char *devstr); -int qemuDomainAssignPCIAddresses(virDomainDefPtr def, - virQEMUCapsPtr qemuCaps, - virDomainObjPtr obj); -virDomainPCIAddressSetPtr qemuDomainPCIAddressSetCreate(virDomainDefPtr def, - unsigned int nbuses, - bool dryRun); - -int qemuAssignDevicePCISlots(virDomainDefPtr def, - virQEMUCapsPtr qemuCaps, - virDomainPCIAddressSetPtr addrs); - int qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps); int qemuDomainNetVLAN(virDomainNetDefPtr def); int qemuAssignDeviceNetAlias(virDomainDefPtr def, virDomainNetDefPtr net, int idx); diff --git a/src/qemu/qemu_process.h b/src/qemu/qemu_process.h index c674111..cb5cee1 100644 --- a/src/qemu/qemu_process.h +++ b/src/qemu/qemu_process.h @@ -42,8 +42,6 @@ int qemuProcessStopCPUs(virQEMUDriverPtr driver, void qemuProcessAutostartAll(virQEMUDriverPtr driver); void qemuProcessReconnectAll(virConnectPtr conn, virQEMUDriverPtr driver); -int qemuProcessAssignPCIAddresses(virDomainDefPtr def); - typedef struct _qemuProcessIncomingDef qemuProcessIncomingDef; typedef qemuProcessIncomingDef *qemuProcessIncomingDefPtr; struct _qemuProcessIncomingDef { -- 2.5.0

2 1

[libvirt] [PATCH] include: Handle case when builddir == srcdir
by Michal Privoznik 01 Feb '16

01 Feb '16

In my previous commit a70f3b1c779120129 I've tried to fix case when building from VPATH and a file wasn't being installed. However, my fix broke non-VPATH build. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- include/Makefile.am | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/Makefile.am b/include/Makefile.am index 6b0b41e..754c298 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -19,7 +19,7 @@ virincdir = $(includedir)/libvirt allheaders = $(wildcard $(srcdir)/libvirt/*.h) -virinc_HEADERS = $(filter-out $(srcdir)/libvirt/libvirt-admin.h, $(allheaders)) +virinc_HEADERS = $(filter-out $(srcdir)/libvirt/libvirt-admin.h $(srcdir)/libvirt/libvirt-common.h, $(allheaders)) virinc_HEADERS += libvirt/libvirt-common.h EXTRA_DIST = libvirt/libvirt-common.h.in -- 2.4.10

1 0

[libvirt] [PATCH] qemu: Align dump options for watchdog and on_crash events
by Boris Fiuczynski 01 Feb '16

01 Feb '16

Having on_crash set to either coredump-destroy or coredump-restart creates core dumps with option memory-only in the directory specified by auto_dump_path. When a watchdog is triggered with the action dump the core dump is also placed into the directory specified by auto_dump_path but is created without the option memory-only. This patch sets the option memory-only also for core dumps created by the watchdog event. Signed-off-by: Boris Fiuczynski <fiuczy(a)linux.vnet.ibm.com> Reviewed-by: Bjoern Walk <bwalk(a)linux.vnet.ibm.com> Reviewed-by: Stefan Zimmermann <stzi(a)linux.vnet.ibm.com> --- src/qemu/qemu_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f429832..88ecf48 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -3894,7 +3894,7 @@ static void processWatchdogEvent(virQEMUDriverPtr driver, virDomainObjPtr vm, in case VIR_DOMAIN_WATCHDOG_ACTION_DUMP: { char *dumpfile; - unsigned int flags = 0; + unsigned int flags = VIR_DUMP_MEMORY_ONLY; if (virAsprintf(&dumpfile, "%s/%s-%u", cfg->autoDumpPath, -- 2.3.0

2 2

[libvirt] [PATCH v2] qemu: return -1 on error paths in qemuDomainSaveImageStartVM
by Nikolay Shirokovskiy 01 Feb '16

01 Feb '16

Error paths after sending the event that domain is started written as if ret = -1 which is set at the beginning of the function. It's common idioma to keep 'ret' equal to -1 until the end of function where it is set to 0. But here we use ret to keep result of restore operation too and thus breaks the idioma and its users :) Let's use different variable to hold restore result. Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com> --- src/qemu/qemu_driver.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 351e529..ced105b 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6732,6 +6732,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, qemuDomainAsyncJob asyncJob) { int ret = -1; + bool restored; virObjectEventPtr event; int intermediatefd = -1; virCommandPtr cmd = NULL; @@ -6758,13 +6759,13 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, } /* Set the migration source and start it up. */ - ret = qemuProcessStart(conn, driver, vm, asyncJob, - "stdio", *fd, path, NULL, - VIR_NETDEV_VPORT_PROFILE_OP_RESTORE, - VIR_QEMU_PROCESS_START_PAUSED); + restored = qemuProcessStart(conn, driver, vm, asyncJob, + "stdio", *fd, path, NULL, + VIR_NETDEV_VPORT_PROFILE_OP_RESTORE, + VIR_QEMU_PROCESS_START_PAUSED) >= 0; if (intermediatefd != -1) { - if (ret < 0) { + if (!restored) { /* if there was an error setting up qemu, the intermediate * process will wait forever to write to stdout, so we * must manually kill it. @@ -6775,7 +6776,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, if (virCommandWait(cmd, NULL) < 0) { qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED, 0); - ret = -1; + restored = false; } VIR_DEBUG("Decompression binary stderr: %s", NULLSTR(errbuf)); } @@ -6783,18 +6784,16 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, if (VIR_CLOSE(*fd) < 0) { virReportSystemError(errno, _("cannot close file: %s"), path); - ret = -1; + restored = false; } - if (ret < 0) { - virDomainAuditStart(vm, "restored", false); + virDomainAuditStart(vm, "restored", restored); + if (!restored) goto cleanup; - } event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_RESTORED); - virDomainAuditStart(vm, "restored", true); qemuDomainEventQueue(driver, event); -- 1.8.3.1

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