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Fri, 21 Jul 2017 17:45:57 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" From: Scott Garfinkle virsh migrate-getmaxdowntime command libvirt and virsh side, including help Signed-off-by: Scott Garfinkle --- include/libvirt/libvirt-domain.h | 4 ++++ src/driver-hypervisor.h | 6 ++++++ src/libvirt-domain.c | 43 +++++++++++++++++++++++++++++++++++++ src/remote/remote_driver.c | 1 + tools/virsh-domain.c | 46 ++++++++++++++++++++++++++++++++++++= ++++ tools/virsh.pod | 18 ++++++++++++++++ 6 files changed, 118 insertions(+) diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-dom= ain.h index 45f939a..ed3c461 100644 --- a/include/libvirt/libvirt-domain.h +++ b/include/libvirt/libvirt-domain.h @@ -1043,6 +1043,10 @@ int virDomainMigrateSetMaxDowntime (virDomainPtr dom= ain, unsigned long long downtime, unsigned int flags); =20 +int virDomainMigrateGetMaxDowntime (virDomainPtr domain, + unsigned long long *downtime, + unsigned int flags); + int virDomainMigrateGetCompressionCache(virDomainPtr domain, unsigned long long *cacheSize, unsigned int flags); diff --git a/src/driver-hypervisor.h b/src/driver-hypervisor.h index 3053d7a..7d32cad 100644 --- a/src/driver-hypervisor.h +++ b/src/driver-hypervisor.h @@ -702,6 +702,11 @@ typedef int unsigned int flags); =20 typedef int +(*virDrvDomainMigrateGetMaxDowntime)(virDomainPtr domain, + unsigned long long *downtime, + unsigned int flags); + +typedef int (*virDrvDomainMigrateGetCompressionCache)(virDomainPtr domain, unsigned long long *cacheSize, unsigned int flags); @@ -1412,6 +1417,7 @@ struct _virHypervisorDriver { virDrvDomainGetJobInfo domainGetJobInfo; virDrvDomainGetJobStats domainGetJobStats; virDrvDomainAbortJob domainAbortJob; + virDrvDomainMigrateGetMaxDowntime domainMigrateGetMaxDowntime; virDrvDomainMigrateSetMaxDowntime domainMigrateSetMaxDowntime; virDrvDomainMigrateGetCompressionCache domainMigrateGetCompressionCach= e; virDrvDomainMigrateSetCompressionCache domainMigrateSetCompressionCach= e; diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index 4033ae8..12417e2 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -8781,6 +8781,49 @@ virDomainMigrateSetMaxDowntime(virDomainPtr domain, =20 =20 /** + * virDomainMigrateGetMaxDowntime: + * @domain: a domain object + * @downtime: return value of the maximum tolerable downtime for live migr= ation, in milliseconds + * @flags: extra flags; not used yet, so callers should always pass 0 + * + * Gets current maximum tolerable time for which the domain is allowed to = be paused + * at the end of live migration. It's supposed to be called while the doma= in is + * being live-migrated as a reaction to migration progress. + * + * Returns 0 in case of success, -1 otherwise. + */ +int +virDomainMigrateGetMaxDowntime(virDomainPtr domain, + unsigned long long *downtime, + unsigned int flags) +{ + virConnectPtr conn; + + VIR_DOMAIN_DEBUG(domain, "downtime =3D %p, flags=3D%x", downtime, flag= s); + + virResetLastError(); + + virCheckDomainReturn(domain, -1); + conn =3D domain->conn; + + virCheckNonNullArgGoto(downtime, error); + + //unlike SetMaxDowntime, it's okay for the connection to be readonly + + if (conn->driver->domainMigrateGetMaxDowntime) { + if (conn->driver->domainMigrateGetMaxDowntime(domain, downtime, fl= ags) < 0) + goto error; + return 0; + } + + virReportUnsupportedError(); + error: + virDispatchError(conn); + return -1; +} + + +/** * virDomainMigrateGetCompressionCache: * @domain: a domain object * @cacheSize: return value of current size of the cache (in bytes) diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index a57d25f..aa8d8a1 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -8400,6 +8400,7 @@ static virHypervisorDriver hypervisor_driver =3D { .domainGetJobInfo =3D remoteDomainGetJobInfo, /* 0.7.7 */ .domainGetJobStats =3D remoteDomainGetJobStats, /* 1.0.3 */ .domainAbortJob =3D remoteDomainAbortJob, /* 0.7.7 */ + .domainMigrateGetMaxDowntime =3D remoteDomainMigrateGetMaxDowntime, /*= 3.6.0 */ .domainMigrateSetMaxDowntime =3D remoteDomainMigrateSetMaxDowntime, /*= 0.8.0 */ .domainMigrateGetCompressionCache =3D remoteDomainMigrateGetCompressio= nCache, /* 1.0.3 */ .domainMigrateSetCompressionCache =3D remoteDomainMigrateSetCompressio= nCache, /* 1.0.3 */ diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 0684979..1b524a3 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -10720,6 +10720,46 @@ cmdMigrateSetMaxDowntime(vshControl *ctl, const vs= hCmd *cmd) } =20 /* + * "migrate-getmaxdowntime" command + */ +static const vshCmdInfo info_migrate_getmaxdowntime[] =3D { + {.name =3D "help", + .data =3D N_("get maximum tolerable downtime") + }, + {.name =3D "desc", + .data =3D N_("Get maximum tolerable downtime (in milliseconds)for a d= omain which is being live-migrated to another host.") + }, + {.name =3D NULL} +}; + +static const vshCmdOptDef opts_migrate_getmaxdowntime[] =3D { + VIRSH_COMMON_OPT_DOMAIN_FULL, + {.name =3D NULL} +}; + +static bool +cmdMigrateGetMaxDowntime(vshControl *ctl, const vshCmd *cmd) +{ + virDomainPtr dom =3D NULL; + unsigned long long downtime; + bool ret =3D false; + + if (!(dom =3D virshCommandOptDomain(ctl, cmd, NULL))) + return false; + + if (virDomainMigrateGetMaxDowntime(dom, &downtime, 0)) + goto done; + + vshPrint(ctl, "%llu\n", downtime); + + ret =3D true; + + done: + virDomainFree(dom); + return ret; +} + +/* * "migrate-compcache" command */ static const vshCmdInfo info_migrate_compcache[] =3D { @@ -13845,6 +13885,12 @@ const vshCmdDef domManagementCmds[] =3D { .info =3D info_migrate_setmaxdowntime, .flags =3D 0 }, + {.name =3D "migrate-getmaxdowntime", + .handler =3D cmdMigrateGetMaxDowntime, + .opts =3D opts_migrate_getmaxdowntime, + .info =3D info_migrate_getmaxdowntime, + .flags =3D 0 + }, {.name =3D "migrate-compcache", .handler =3D cmdMigrateCompCache, .opts =3D opts_migrate_compcache, diff --git a/tools/virsh.pod b/tools/virsh.pod index 43d6f0c..fc0a46c 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -1869,6 +1869,24 @@ is supposed to be used while the domain is being liv= e-migrated as a reaction to migration progress and increasing number of compression cache misses obtained from domjobinfo. =20 +=3Ditem B I + +Get the maximum tolerable downtime for a domain which is being live-migrat= ed to +another host. This is the number of milliseconds the guest is allowed +to be down at the end of live migration. + +=3Ditem B I [I<--size> B] + +Sets and/or gets size of the cache (in bytes) used for compressing repeate= dly +transferred memory pages during live migration. When called without I, +the command just prints current size of the compression cache. When I +is specified, the hypervisor is asked to change compression cache to I +bytes and then the current size is printed (the result may differ from the +requested size due to rounding done by the hypervisor). The I option +is supposed to be used while the domain is being live-migrated as a reacti= on +to migration progress and increasing number of compression cache misses +obtained from domjobinfo. + =3Ditem B I I =20 Set the maximum migration bandwidth (in MiB/s) for a domain which is being --=20 1.8.3.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list