January 2017 - Devel - libvirt List Archives

[libvirt] (no subject)
by 乔立勇(Eli Qiao) 13 Jan '17

13 Jan '17

hi all Thanks all for the comment for previous RFC version, I summary all input here also with Opens which I am not sure, can you please review again? #Propose Changes ## Expose cache information into capabilities Extend capabilities to expose all level cache resource information and should tell the topology of caches also tell which kinds of resources can be tuned/allocation There information comes from /sys/devices/system/cpu/cpu0/cache/index${level}/size also /sys/fs/resctrl/ (this is CAT sys interface in linux kernel) virsh capabilities <cache> <bank id='0, 'type="l3" size="56320" units="KiB" cpus="0,1,2,6,7,8"/> <--------------------- level 3 cache is per socket, so group them by socket id <control unit="KiB" min="2816"/> <bank id='1', type="l3" size="56320" units="KiB" cpus="3,4,5,9,10,11"/> <bank id='2' type="l2" size="256" units="KiB" cpus="0"/> <bank id='3' type="l2" size="256" units="KiB" cpus="1"/> <bank id='4' type="l2" size="256" units="KiB" cpus="2"/> <bank id='5' type="l2" size="256" units="KiB" cpus="3"/> <bank id='6' type="l2" size="256" units="KiB" cpus="4"/> ... <cache> Opens 1. how about add socket id to bank for bank type = l3 ? 2. do we really want to expose l2/l3 cache for now , they are per core resource and linux kernel don't support l2 yet (depend no hardware)? 3. if enable CDP in resctrl, for bank type=l3 , it will be split to l3data l3code, should expose this ability. <bank type="l3" size="56320" units="KiB" cpus="0,1,2,6,7,8"/> <--------------------- level 3 cache is per socket, so group them by socket id <control unit="KiB" min="2816" cdp="enabled"/> ## Provide a new API to get the avail cache on each bank, such as the output are: id=0 type=l3 avail=56320 total = ?? <--------- do we need this? id=1 type=l3 avail=56320 id=3 type=l2 avail=256 Opens: · Don't expose the avail cache information if the host can not do the allocation of that type cache(eg, for l2 currently) ? · We can not make all of the cache , the reservation amount is the min_cbm_len (=1) * min_unit . · do we need to expose total? ## enable CAT for a domain 1 Domain XML changes <cputune> <cache id="1" host_id="0" type="l3" size="5632" unit="KiB"/> <cache id="2" host_id="1" type="l3" size="5632" unit="KiB"/> <cpu_cache vcpus="0-3" id="1"/> <cpu_cache vcpus="4-7" id="2"/> <iothread_cache iothreads="0-1" id="1"/> <emulator_cache id="2"/> </cputune> 2. Extend cputune command ? Opens: 1. Do we accept to extend existed API ? or using new API/virsh? 2. How to calculate cache size -> CBM bit? eg: 5632/ 2816 = 2 bits 5733/ 2816 = 2 bits or 3 bits? ## Restriction for using cache tune on multiple sockets' host. The l3 cache is per socket resource, kernel need to know about what's affinity looks like, so for a VM which running on a multiple socket's host, it should have NUMA setting or vcpuset pin setting. Or cache tune will fail. [1] kernel support https://git.kernel.org/cgit/linux/kernel/git/tip/ tip.git/tree/arch/x86/kernel/cpu/intel_rdt.c?h=x86/cache [2] libvirt PoC(not finished yet) https://github.com/taget/ libvirt/commits/cat_new -- Best regards - Eli 天涯无处不重逢 a leaf duckweed belongs to the sea , where not to meet in life

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[libvirt] [PATCH go-xml] Added domain snapshot schema
by Alexey Slaykovsky 12 Jan '17

12 Jan '17

Signed-off-by: Alexey Slaykovsky <aslaikov(a)redhat.com> --- domain.go | 11 ++- domain_snapshot.go | 79 ++++++++++++++++++++ domain_snapshot_test.go | 190 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 278 insertions(+), 2 deletions(-) create mode 100644 domain_snapshot.go create mode 100644 domain_snapshot_test.go diff --git a/domain.go b/domain.go index 8afe32d..161ba33 100644 --- a/domain.go +++ b/domain.go @@ -43,11 +43,18 @@ type DomainDiskDriver struct { Type string `xml:"type,attr"` } +type DomainDiskTarget struct { + Dev string `xml:"dev,attr"` + Bus string `xml:"bus,attr"` +} + type DomainDisk struct { Type string `xml:"type,attr"` Device string `xml:"device,attr"` + Snapshot string `xml:"snapshot,attr,omitempty"` Driver DomainDiskDriver `xml:"driver"` FileSource DomainDiskFileSource `xml:"source"` + Target *DomainDiskTarget `xml:"target"` } type DomainInterfaceMAC struct { @@ -123,7 +130,7 @@ type DomainDeviceList struct { type DomainMemory struct { Value string `xml:",chardata"` - Unit string `xml:"unit,attr"` + Unit string `xml:"unit,attr,omitempty"` } type DomainOSType struct { @@ -191,7 +198,7 @@ type DomainOS struct { type Domain struct { XMLName xml.Name `xml:"domain"` - Type string `xml:"type,attr"` + Type string `xml:"type,attr,omitempty"` Name string `xml:"name"` UUID *string `xml:"uuid"` Memory *DomainMemory `xml:"memory"` diff --git a/domain_snapshot.go b/domain_snapshot.go new file mode 100644 index 0000000..226cd09 --- /dev/null +++ b/domain_snapshot.go @@ -0,0 +1,79 @@ +/* + * This file is part of the libvirt-go-xml project + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * Copyright (C) 2017 Red Hat, Inc. + * + */ + +package libvirtxml + +import "encoding/xml" + +type DomainSnapshotDiskDriver struct { + Type string `xml:"type,attr"` +} + +type DomainSnapshotDiskSource struct { + File string `xml:"file,attr"` +} + +type DomainSnapshotDisk struct { + Name string `xml:"name,attr"` + Snapshot string `xml:"snapshot,attr,omitempty"` + Driver *DomainSnapshotDiskDriver `xml:"driver"` + Source *DomainSnapshotDiskSource `xml:"source"` +} + +type DomainSnapshotDisks struct { + Disks []DomainSnapshotDisk `xml:"disk"` +} + +type DomainSnapshotMemory struct { + Snapshot string `xml:"snapshot,attr"` +} + +type DomainSnapshotParent struct { + Name string `xml:"name"` +} + +type DomainSnapshot struct { + XMLName xml.Name `xml:"domainsnapshot"` + Name string `xml:"name,omitempty"` + Description string `xml:"description,omitempty"` + State string `xml:"state,omitempty"` + CreationTime string `xml:"creationTime,omitempty"` + Parent *DomainSnapshotParent `xml:"parent"` + Memory *DomainSnapshotMemory `xml:"memory"` + Disks *DomainSnapshotDisks `xml:"disks"` + Domain *Domain `xml:"domain"` +} + +func (s *DomainSnapshot) Unmarshal(doc string) error { + return xml.Unmarshal([]byte(doc), s) +} + +func (s *DomainSnapshot) Marshal() (string, error) { + doc, err := xml.MarshalIndent(s, "", " ") + if err != nil { + return "", err + } + return string(doc), nil +} diff --git a/domain_snapshot_test.go b/domain_snapshot_test.go new file mode 100644 index 0000000..e33bc6b --- /dev/null +++ b/domain_snapshot_test.go @@ -0,0 +1,190 @@ +/* + * This file is part of the libvirt-go-xml project + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * Copyright (C) 2017 Red Hat, Inc. + * + */ + +package libvirtxml + +import ( + "strings" + "testing" +) + +var domainSnapshotTestData = []struct { + Object *DomainSnapshot + Expected []string +}{ + { + Object: &DomainSnapshot{ + Description: "Snapshot", + Disks: &DomainSnapshotDisks{ + []DomainSnapshotDisk{ + DomainSnapshotDisk{ + Name: "/old", + Source: &DomainSnapshotDiskSource{ + File: "/new", + }, + }, + DomainSnapshotDisk{ + Name: "vdb", + Snapshot: "no", + }, + }, + }, + }, + Expected: []string{ + `<domainsnapshot>`, + ` <description>Snapshot</description>`, + ` <disks>`, + ` <disk name="/old">`, + ` <source file="/new"></source>`, + ` </disk>`, + ` <disk name="vdb" snapshot="no"></disk>`, + ` </disks>`, + `</domainsnapshot>`, + }, + }, + { + Object: &DomainSnapshot{ + Name: "1270477159", + Description: "Snapshot of OS install and updates", + State: "running", + CreationTime: "1270477159", + Parent: &DomainSnapshotParent{ + Name: "bare-os-install", + }, + Memory: &DomainSnapshotMemory{ + Snapshot: "no", + }, + Disks: &DomainSnapshotDisks{ + Disks: []DomainSnapshotDisk{ + DomainSnapshotDisk{ + Name: "vda", + Snapshot: "external", + Driver: &DomainSnapshotDiskDriver{ + Type: "qcow2", + }, + Source: &DomainSnapshotDiskSource{ + File: "/path/to/new", + }, + }, + DomainSnapshotDisk{ + Name: "vdb", + Snapshot: "no", + }, + }, + }, + Domain: &Domain{ + Name: "fedora", + Memory: &DomainMemory{ + Value: "1048576", + }, + Devices: &DomainDeviceList{ + Disks: []DomainDisk{ + DomainDisk{ + Type: "file", + Device: "disk", + Driver: DomainDiskDriver{ + Name: "qemu", + Type: "raw", + }, + FileSource: DomainDiskFileSource{ + File: "/path/to/old", + }, + Target: &DomainDiskTarget{ + Dev: "vda", + Bus: "virtio", + }, + }, + DomainDisk{ + Type: "file", + Device: "disk", + Snapshot: "external", + Driver: DomainDiskDriver{ + Name: "qemu", + Type: "raw", + }, + FileSource: DomainDiskFileSource{ + File: "/path/to/old2", + }, + Target: &DomainDiskTarget{ + Dev: "vdb", + Bus: "virtio", + }, + }, + }, + }, + }, + }, + Expected: []string{ + `<domainsnapshot>`, + ` <name>1270477159</name>`, + ` <description>Snapshot of OS install and updates</description>`, + ` <state>running</state>`, + ` <creationTime>1270477159</creationTime>`, + ` <parent>`, + ` <name>bare-os-install</name>`, + ` </parent>`, + ` <memory snapshot="no"></memory>`, + ` <disks>`, + ` <disk name="vda" snapshot="external">`, + ` <driver type="qcow2"></driver>`, + ` <source file="/path/to/new"></source>`, + ` </disk>`, + ` <disk name="vdb" snapshot="no"></disk>`, + ` </disks>`, + ` <domain>`, + ` <name>fedora</name>`, + ` <memory>1048576</memory>`, + ` <devices>`, + ` <disk type="file" device="disk">`, + ` <driver name="qemu" type="raw"></driver>`, + ` <source file="/path/to/old"></source>`, + ` <target dev="vda" bus="virtio"></target>`, + ` </disk>`, + ` <disk type="file" device="disk" snapshot="external">`, + ` <driver name="qemu" type="raw"></driver>`, + ` <source file="/path/to/old2"></source>`, + ` <target dev="vdb" bus="virtio"></target>`, + ` </disk>`, + ` </devices>`, + ` </domain>`, + `</domainsnapshot>`, + }, + }, +} + +func TestDomainSnapshot(t *testing.T) { + for _, test := range domainSnapshotTestData { + doc, err := test.Object.Marshal() + if err != nil { + t.Fatal(err) + } + + expect := strings.Join(test.Expected, "\n") + + if doc != expect { + t.Fatal("Bad xml:\n", string(doc), "\n does not match\n", expect, "\n") + } + } +} -- 2.11.0

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[libvirt] [PATCH 0/2] Fix issues getting voldef capacity value
by John Ferlan 12 Jan '17

12 Jan '17

Details in each patch - essentially trying to get "more correct" values. John Ferlan (2): storage: Fix virStorageBackendUpdateVolTargetInfo type check storage: Allow probe of volume capacity for BLOCK type src/storage/storage_backend.c | 12 ++++++++---- src/storage/storage_backend.h | 3 ++- src/storage/storage_backend_fs.c | 3 ++- 3 files changed, 12 insertions(+), 6 deletions(-) -- 2.7.4

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[libvirt] [PATCH] nodedev: Fabric name must not be required for fc_host capability
by Boris Fiuczynski 12 Jan '17

12 Jan '17

fabric_name is one of many fc_host attributes in Linux that is optional and left to the low-level driver to decide if it is implemented. The zfcp device driver does not provide a fabric name for an fcp host. This patch removes the requirement for a fabric name by making it optional. Signed-off-by: Boris Fiuczynski <fiuczy(a)linux.vnet.ibm.com> Reviewed-by: Bjoern Walk <bwalk(a)linux.vnet.ibm.com> --- docs/formatnode.html.in | 2 +- docs/schemas/nodedev.rng | 8 +++--- src/node_device/node_device_linux_sysfs.c | 3 +-- src/util/virutil.c | 4 +-- tests/fchostdata/fc_host/host7/node_name | 1 + tests/fchostdata/fc_host/host7/port_name | 1 + tests/fchostdata/fc_host/host7/port_state | 1 + tests/fchosttest.c | 44 ++++++++++++++++++++++++++++--- 8 files changed, 53 insertions(+), 11 deletions(-) create mode 100644 tests/fchostdata/fc_host/host7/node_name create mode 100644 tests/fchostdata/fc_host/host7/port_name create mode 100644 tests/fchostdata/fc_host/host7/port_state diff --git a/docs/formatnode.html.in b/docs/formatnode.html.in index e7b1140..f8d0e12 100644 --- a/docs/formatnode.html.in +++ b/docs/formatnode.html.in @@ -254,7 +254,7 @@ number of vport in use. <code>max_vports</code> shows the maximum vports the HBA supports. "fc_host" implies following sub-elements: <code>wwnn</code>, <code>wwpn</code>, and - <code>fabric_wwn</code>. + optionally <code>fabric_wwn</code>. </dd> </dl> </dd> diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng index 9c98402..b100a6e 100644 --- a/docs/schemas/nodedev.rng +++ b/docs/schemas/nodedev.rng @@ -367,9 +367,11 @@ <ref name='wwn'/> </element> - <element name='fabric_wwn'> - <ref name='wwn'/> - </element> + <optional> + <element name='fabric_wwn'> + <ref name='wwn'/> + </element> + </optional> </define> <define name='capsvports'> diff --git a/src/node_device/node_device_linux_sysfs.c b/src/node_device/node_device_linux_sysfs.c index be99c41..e043744 100644 --- a/src/node_device/node_device_linux_sysfs.c +++ b/src/node_device/node_device_linux_sysfs.c @@ -73,9 +73,8 @@ nodeDeviceSysfsGetSCSIHostCaps(virNodeDevCapDataPtr d) VIR_STEAL_PTR(d->scsi_host.wwnn, tmp); if (!(tmp = virReadFCHost(NULL, d->scsi_host.host, "fabric_name"))) { - VIR_WARN("Failed to read fabric WWN for host%d", + VIR_INFO("Optional fabric WWN for host%d not available", d->scsi_host.host); - goto cleanup; } VIR_FREE(d->scsi_host.fabric_wwn); VIR_STEAL_PTR(d->scsi_host.fabric_wwn, tmp); diff --git a/src/util/virutil.c b/src/util/virutil.c index aeaa7f9..ab61302 100644 --- a/src/util/virutil.c +++ b/src/util/virutil.c @@ -2011,7 +2011,7 @@ virGetSCSIHostNameByParentaddr(unsigned int domain, * * Read the value of sysfs "fc_host" entry. * - * Returns result as a stringon success, caller must free @result after + * Returns result as a string on success, caller must free @result after * Otherwise returns NULL. */ char * @@ -2029,7 +2029,7 @@ virReadFCHost(const char *sysfs_prefix, host, entry) < 0) goto cleanup; - if (virFileReadAll(sysfs_path, 1024, &buf) < 0) + if (virFileReadAllQuiet(sysfs_path, 1024, &buf) < 0) goto cleanup; if ((p = strchr(buf, '\n'))) diff --git a/tests/fchostdata/fc_host/host7/node_name b/tests/fchostdata/fc_host/host7/node_name new file mode 100644 index 0000000..73a91bd --- /dev/null +++ b/tests/fchostdata/fc_host/host7/node_name @@ -0,0 +1 @@ +0x2002001b32a9da4e diff --git a/tests/fchostdata/fc_host/host7/port_name b/tests/fchostdata/fc_host/host7/port_name new file mode 100644 index 0000000..f25abeb --- /dev/null +++ b/tests/fchostdata/fc_host/host7/port_name @@ -0,0 +1 @@ +0x2102001b32a9da4e diff --git a/tests/fchostdata/fc_host/host7/port_state b/tests/fchostdata/fc_host/host7/port_state new file mode 100644 index 0000000..b73dd46 --- /dev/null +++ b/tests/fchostdata/fc_host/host7/port_state @@ -0,0 +1 @@ +Online diff --git a/tests/fchosttest.c b/tests/fchosttest.c index a08a2e8..ba580aa 100644 --- a/tests/fchosttest.c +++ b/tests/fchosttest.c @@ -29,13 +29,16 @@ static char *fchost_prefix; #define TEST_FC_HOST_PREFIX fchost_prefix #define TEST_FC_HOST_NUM 5 +#define TEST_FC_HOST_NUM_NO_FAB 7 /* Test virIsCapableFCHost */ static int test1(const void *data ATTRIBUTE_UNUSED) { if (virIsCapableFCHost(TEST_FC_HOST_PREFIX, - TEST_FC_HOST_NUM)) + TEST_FC_HOST_NUM) && + virIsCapableFCHost(TEST_FC_HOST_PREFIX, + TEST_FC_HOST_NUM_NO_FAB)) return 0; return -1; @@ -106,10 +109,43 @@ test3(const void *data ATTRIBUTE_UNUSED) return ret; } -/* Test virGetFCHostNameByWWN */ +/* Test virReadFCHost fabric name optional */ static int test4(const void *data ATTRIBUTE_UNUSED) { + const char *expect_wwnn = "2002001b32a9da4e"; + const char *expect_wwpn = "2102001b32a9da4e"; + char *wwnn = NULL; + char *wwpn = NULL; + int ret = -1; + + if (!(wwnn = virReadFCHost(TEST_FC_HOST_PREFIX, TEST_FC_HOST_NUM_NO_FAB, + "node_name"))) + return -1; + + if (!(wwpn = virReadFCHost(TEST_FC_HOST_PREFIX, TEST_FC_HOST_NUM_NO_FAB, + "port_name"))) + goto cleanup; + + if (virReadFCHost(TEST_FC_HOST_PREFIX, TEST_FC_HOST_NUM_NO_FAB, + "fabric_name")) + goto cleanup; + + if (STRNEQ(expect_wwnn, wwnn) || + STRNEQ(expect_wwpn, wwpn)) + goto cleanup; + + ret = 0; + cleanup: + VIR_FREE(wwnn); + VIR_FREE(wwpn); + return ret; +} + +/* Test virGetFCHostNameByWWN */ +static int +test5(const void *data ATTRIBUTE_UNUSED) +{ const char *expect_hostname = "host5"; char *hostname = NULL; int ret = -1; @@ -130,7 +166,7 @@ test4(const void *data ATTRIBUTE_UNUSED) /* Test virFindFCHostCapableVport (host4 is not Online) */ static int -test5(const void *data ATTRIBUTE_UNUSED) +test6(const void *data ATTRIBUTE_UNUSED) { const char *expect_hostname = "host5"; char *hostname = NULL; @@ -169,6 +205,8 @@ mymain(void) ret = -1; if (virTestRun("test5", test5, NULL) < 0) ret = -1; + if (virTestRun("test6", test6, NULL) < 0) + ret = -1; cleanup: VIR_FREE(fchost_prefix); -- 2.5.5

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[libvirt] [PATCH] disk: Fixup error handling path for devmapper when part_separator='yes'
by John Ferlan 12 Jan '17

12 Jan '17

https://bugzilla.redhat.com/show_bug.cgi?id=1346566 If libvirt_parthelper is erroneously told to append the partition separator 'p' onto the generated output for a disk pool using device mapper that has 'user_friendly_names' set to true, then the error recovery path will fail to find volume resulting in the pool being in an unusable state. So, augment the documentation to provide the better hint that the part_separator='yes' should be set when user_friendly_names are not being used. Additionally, once we're in the error path where the returned name doesn't match the expected partition name try to see if the reason is because the 'p' was erroneosly added. If so alter the about to be removed vol->target.path so that the DiskDeleteVol code can find the partition that was created and remove it. Signed-off-by: John Ferlan <jferlan(a)redhat.com> --- docs/formatstorage.html.in | 5 ++++- src/storage/storage_backend_disk.c | 23 +++++++++++++++++++++++ 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/docs/formatstorage.html.in b/docs/formatstorage.html.in index ed1f0d1..7690114 100644 --- a/docs/formatstorage.html.in +++ b/docs/formatstorage.html.in @@ -138,7 +138,10 @@ causes libvirt to attempt to generate and find target volume path's using a "p" separator. The default algorithm used by device mapper is to add the "p" separator only when the source device path ends - with a number. + with a number; however, it's possible to configure the devmapper + device to not use 'user_friendly_names' thus creating partitions + with the "p" separator even when the device source path does not + end with a number. <span class="since">Since 1.3.1</span></p></dd> <dt><code>dir</code></dt> <dd>Provides the source for pools backed by directories (pool diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index 666ad03..07a04f1 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -95,6 +95,29 @@ virStorageBackendDiskMakeDataVol(virStoragePoolObjPtr pool, virReportError(VIR_ERR_INVALID_ARG, _("invalid partition name '%s', expected '%s'"), vol->name, partname); + + /* Let's see if we by chance parthelper created a name that won't be + * found later when we try to delete. We tell parthelper to add a 'p' + * to the output via the part_separator flag, but if devmapper has + * user_friendly_names set, the creation won't happen that way, thus + * our deletion will fail because the name we generated is wrong. + * Check for our conditions and see if the generated name is the + * same as StablePath returns and has the 'p' in it */ + if (pool->def->source.devices[0].part_separator == + VIR_TRISTATE_BOOL_YES && + !virIsDevMapperDevice(vol->target.path) && + STREQ(groups[0], vol->target.path) && + (tmp = strrchr(groups[0], 'p'))) { + + /* If we remove the 'p' from groups[0] and the resulting + * device is a devmapper device, then we know parthelper + * was told to create the wrong name based on the results. + * So just remove the 'p' from the vol->target.path too. */ + memmove(tmp, tmp + 1, strlen(tmp)); + if (virIsDevMapperDevice(groups[0]) && + (tmp = strrchr(vol->target.path, 'p'))) + memmove(tmp, tmp + 1, strlen(tmp)); + } return -1; } -- 2.7.4

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[libvirt] [PATCH] docs: Document <sndbuf/>
by Michal Privoznik 12 Jan '17

12 Jan '17

This element has been introduced in fe053dbea7, but isn't documented yet. After exactly 6 years I guess we can finally document it. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- docs/formatdomain.html.in | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 39f5a8823..30cb19626 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -4975,6 +4975,9 @@ qemu-kvm -net nic,model=? /dev/null <model type='virtio'/> <b><backend tap='/dev/net/tun' vhost='/dev/vhost-net'/></b> <driver name='vhost' txmode='iothread' ioeventfd='on' event_idx='off' queues='5'/> + <b><tune> + <sndbuf>1600</sndbuf> + </tune></b> </interface> </devices> ...</pre> @@ -4985,7 +4988,12 @@ qemu-kvm -net nic,model=? /dev/null device path (<code>/dev/vhost-net</code>) for devices with <code>virtio</code> model. The <code>tap</code> attribute overrides the tun/tap device path (default: <code>/dev/net/tun</code>) for network and bridge interfaces. This does not work - in session mode. + in session mode. <span class="since">Since 1.2.9</span> + </p> + <p> + For tap devices there is also <code>sndbuf</code> element which can + adjust the size of send buffer in the host. <span class="since">Since + 0.8.8</span> </p> <h5><a name="elementsNICSTargetOverride">Overriding the target element</a></h5> -- 2.11.0

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[libvirt] [PATCH v2 00/11] tests: qemu: Add cpu hotplug testing
by Peter Krempa 12 Jan '17

12 Jan '17

This is a repost of https://www.redhat.com/archives/libvir-list/2016-December/msg00420.html after a recent rebase conflict. Add some useful monitor infrastructure to simplify testing and add testing for the cpu hotplug code. The code has some complex logic which was not covered by current test suite. Peter Krempa (11): qemu: monitor: More strict checking of 'query-cpus' if hotplug is supported util: json: Add helper to reformat JSON strings tests: qemu: Document qemuMonitorTestNewFromFile qemu: Prepare for reuse of qemuDomainSetVcpusLive qemu: Move cpu hotplug code into qemu_hotplug.c tests: qemumonitor: Propagate better error messages tests: qemu: monitor: Add helpers to test full command syntax tests: qemu: Add helper to load full monitor conversation from file tests: hotplug: Add test infrastructure for testing qemu CPU hotplug code tests: hotplug: Add test data for legacy cpu hotplug tests: hotplug: Test CPU hotplug with ppc64 data src/libvirt_private.syms | 1 + src/qemu/qemu_driver.c | 328 ------------ src/qemu/qemu_hotplug.c | 339 ++++++++++++ src/qemu/qemu_hotplug.h | 7 + src/qemu/qemu_monitor.c | 6 +- src/qemu/qemu_monitor_json.c | 6 +- src/qemu/qemu_monitor_json.h | 3 +- src/util/virjson.c | 29 + src/util/virjson.h | 2 + tests/qemuagenttest.c | 3 +- tests/qemuhotplugtest.c | 194 +++++++ tests/qemuhotplugtestcpus/ppc64-bulk-domain.xml | 20 + tests/qemuhotplugtestcpus/ppc64-bulk-monitor.json | 593 +++++++++++++++++++++ .../qemuhotplugtestcpus/ppc64-bulk-result-conf.xml | 64 +++ .../qemuhotplugtestcpus/ppc64-bulk-result-live.xml | 72 +++ .../qemuhotplugtestcpus/x86-modern-bulk-domain.xml | 21 + .../x86-modern-bulk-monitor.json | 471 ++++++++++++++++ .../x86-modern-bulk-result-conf.xml | 40 ++ .../x86-modern-bulk-result-live.xml | 48 ++ tests/qemuhotplugtestcpus/x86-old-bulk-domain.xml | 21 + .../qemuhotplugtestcpus/x86-old-bulk-monitor.json | 193 +++++++ .../x86-old-bulk-result-conf.xml | 30 ++ .../x86-old-bulk-result-live.xml | 38 ++ tests/qemumonitorjsontest.c | 2 +- tests/qemumonitortestutils.c | 322 ++++++++++- tests/qemumonitortestutils.h | 12 +- 26 files changed, 2516 insertions(+), 349 deletions(-) create mode 100644 tests/qemuhotplugtestcpus/ppc64-bulk-domain.xml create mode 100644 tests/qemuhotplugtestcpus/ppc64-bulk-monitor.json create mode 100644 tests/qemuhotplugtestcpus/ppc64-bulk-result-conf.xml create mode 100644 tests/qemuhotplugtestcpus/ppc64-bulk-result-live.xml create mode 100644 tests/qemuhotplugtestcpus/x86-modern-bulk-domain.xml create mode 100644 tests/qemuhotplugtestcpus/x86-modern-bulk-monitor.json create mode 100644 tests/qemuhotplugtestcpus/x86-modern-bulk-result-conf.xml create mode 100644 tests/qemuhotplugtestcpus/x86-modern-bulk-result-live.xml create mode 100644 tests/qemuhotplugtestcpus/x86-old-bulk-domain.xml create mode 100644 tests/qemuhotplugtestcpus/x86-old-bulk-monitor.json create mode 100644 tests/qemuhotplugtestcpus/x86-old-bulk-result-conf.xml create mode 100644 tests/qemuhotplugtestcpus/x86-old-bulk-result-live.xml -- 2.11.0

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[libvirt] [PATCH] news: document libxl HVM network attach fix
by Joao Martins 12 Jan '17

12 Jan '17

Signed-off-by: Joao Martins <joao.m.martins(a)oracle.com> --- docs/news.xml | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/news.xml b/docs/news.xml index 92e39f9..c19bbbb 100644 --- a/docs/news.xml +++ b/docs/news.xml @@ -204,6 +204,16 @@ domain definition. </description> </change> + <change> + <summary> + libxl: reverse defaults on HVM net device attach + </summary> + <description> + Fixes network interface attach for HVM domains when no model is + specified. Emulated hotplug isn't yet supported and hence we should + default to the general working scenario. + </description> + </change> </section> </release> <release version="v2.5.0" date="2016-12-04"> -- 2.1.4

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[libvirt] [PATCH 0/5] Use non-blacklisted family/model/stepping for Haswell CPU model
by Eduardo Habkost 12 Jan '17

12 Jan '17

A recent glibc commit[1] added a blacklist to ensure it won't use TSX on hosts that are known to have a broken TSX implementation. Our existing Haswell CPU model has a blacklisted family/model/stepping combination, so it has to be updated to make sure guests will really use TSX. This is done by patch 5/5. However, to do this safely we need to ensure the host CPU is not a blacklisted one, so we won't mislead guests by exposing known-to-be-good FMS values on a known-to-be-broken host. This is done by patch 3/5. [1] https://sourceware.org/git/?p=glibc.git;a=commit;h=2702856bf45c82cf8e69f206… --- Cc: dgilbert(a)redhat.com Cc: fweimer(a)redhat.com Cc: carlos(a)redhat.com Cc: triegel(a)redhat.com Cc: berrange(a)redhat.com Cc: jdenemar(a)redhat.com Cc: pbonzini(a)redhat.com Eduardo Habkost (5): i386: Add explicit array size to x86_cpu_vendor_words2str() i386: host_vendor_fms() helper function i386/kvm: Blacklist TSX on known broken hosts pc: Add 2.9 machine-types i386: Change stepping of Haswell to non-blacklisted value include/hw/i386/pc.h | 6 ++++++ target/i386/cpu.h | 1 + hw/i386/pc_piix.c | 15 ++++++++++++--- hw/i386/pc_q35.c | 13 +++++++++++-- target/i386/cpu.c | 32 ++++++++++++++++++++++---------- target/i386/kvm.c | 17 +++++++++++++++++ 6 files changed, 69 insertions(+), 15 deletions(-) -- 2.11.0.259.g40922b1

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Re: [libvirt] "[V3] RFC for support cache tune in libvirt"
by Marcelo Tosatti 12 Jan '17

12 Jan '17

Hi, Comments/questions related to: https://www.redhat.com/archives/libvir-list/2017-January/msg00354.html 1) root s2600wt:~/linux# virsh cachetune kvm02 --l3.count 2 How does allocation of code/data look like? 2) 'nodecachestats' command: 3. Add new virsh command 'nodecachestats': This API is to expose vary cache resouce left on each hardware (cpu socket). It will be formated as: <resource_type>.<resource_id>: left size KiB Does this take into account that only contiguous regions of cbm masks can be used for allocations? Also, it should return the amount of free cache on each cacheid. 3) The interface should support different sizes for different cache-ids. See the KVM-RT use case at https://www.redhat.com/archives/libvir-list/2017-January/msg00415.html "WHAT THE USER NEEDS TO SPECIFY FOR VIRTUALIZATION (KVM-RT)". 4) Usefulness of exposing minimum unit size. Rather than specify unit sizes (which forces the user to convert every time the command is executed), why not specify in kbytes and round up? <resctrl name='L3' unit='KiB' cache_size='56320' cache_unit='2816'/> As noted in item 1 of https://www.redhat.com/archives/libvir-list/2017-January/msg00494.html, "1) Convertion of kbytes (user specification) --> number of CBM bits for host.", the format where the size is stored is kbytes, so its awkward to force users and OpenStack to perform the convertion themselves (and zero benefits... nothing changes if you know the unit size). Thanks!

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