Re: [libvirt] [PATCH v2 9/9] virsh: Add iothreadadd and iothreaddel commands

https://bugzilla.redhat.com/show_bug.cgi?id=1161617 Add command to allow adding and removing IOThreads from the domain including the configuration and live domain. $ virsh iothreadadd --help NAME iothreadadd - add an IOThread to the guest domain SYNOPSIS iothreadadd <domain> <id> [--name <string>] [--config] [--live] [--current] DESCRIPTION Add an IOThread to the guest domain. OPTIONS [--domain] <string> domain name, id or uuid [--id] <number> iothread for the new IOThread --name <string> a name for the new IOThread --config affect next boot --live affect running domain --current affect current domain $ virsh iothreaddel --help NAME iothreaddel - delete an IOThread from the guest domain SYNOPSIS iothreaddel <domain> <id> [--config] [--live] [--current] DESCRIPTION Delete an IOThread from the guest domain. OPTIONS [--domain] <string> domain name, id or uuid [--id] <number> iothread_id for the IOThread to delete --config affect next boot --live affect running domain --current affect current domain Assuming a running $dom with multiple IOThreads assigned and that that the $dom has disks assigned to IOThread 1 and IOThread 2: $ virsh iothreadinfo $dom IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 $ virsh iothreadadd $dom 1 error: invalid argument: an IOThread is already using iothread_id '1' in iothreadpids $ virsh iothreadadd $dom 1 --config error: invalid argument: an IOThread is already using iothread_id '1' in persistent iothreadids $ virsh iothreadadd $dom 4 $ virsh iothreadinfo $dom IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 4 0-3 $ virsh iothreadinfo $dom --config IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 $ virsh iothreadadd $dom 4 --config $ virsh iothreadinfo $dom --config IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 4 0-3 $ virsh iothreadadd $dom 5 userdisk $ virsh qemu-monitor-command $dom '{"execute":"query-iothreads"}' {"return":[{"thread-id":17889,"id":"iothread1"},{"thread-id":17890,"id":"iothread2"},{"thread-id":17892,"id":"iothread3"},{"thread-id":17893,"id":"iothread4"},{"thread-id":18108,"id":"userdisk_iothread5"}],"id":"libvirt-104"} $ virsh iothreaddel $dom 5 userdisk Assuming the same original configuration $ virsh iothreaddel $dom 1 error: invalid argument: cannot remove IOThread 1 since it is being used by disk path '/home/vm-images/f18' $ virsh iothreaddel $dom 3 $ virsh iothreadinfo $dom IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 $ virsh iothreadinfo $dom --config IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- tools/virsh-domain.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++ tools/virsh.pod | 32 ++++++++++ 2 files changed, 206 insertions(+) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 928360c..37836ce 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -6977,6 +6977,168 @@ cmdIOThreadPin(vshControl *ctl, const vshCmd *cmd) } /* + * "iothreadadd" command + */ +static const vshCmdInfo info_iothreadadd[] = { + {.name = "help", + .data = N_("add an IOThread to the guest domain") + }, + {.name = "desc", + .data = N_("Add an IOThread to the guest domain.") + }, + {.name = NULL} +}; + +static const vshCmdOptDef opts_iothreadadd[] = { + {.name = "domain", + .type = VSH_OT_DATA, + .flags = VSH_OFLAG_REQ, + .help = N_("domain name, id or uuid") + }, + {.name = "id", + .type = VSH_OT_INT, + .flags = VSH_OFLAG_REQ, + .help = N_("iothread for the new IOThread") + }, + {.name = "name", + .type = VSH_OT_STRING, + .help = N_("a name for the new IOThread") + }, + {.name = "config", + .type = VSH_OT_BOOL, + .help = N_("affect next boot") + }, + {.name = "live", + .type = VSH_OT_BOOL, + .help = N_("affect running domain") + }, + {.name = "current", + .type = VSH_OT_BOOL, + .help = N_("affect current domain") + }, + {.name = NULL} +}; + +static bool +cmdIOThreadAdd(vshControl *ctl, const vshCmd *cmd) +{ + virDomainPtr dom; + int iothread_id = 0; + const char *name_option = NULL; + bool ret = false; + bool config = vshCommandOptBool(cmd, "config"); + bool live = vshCommandOptBool(cmd, "live"); + bool current = vshCommandOptBool(cmd, "current"); + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; + + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + + if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) + return false; + + if (vshCommandOptInt(cmd, "id", &iothread_id) < 0 || iothread_id <= 0) { + vshError(ctl, _("Invalid IOThread id value: '%d'"), iothread_id); + goto cleanup; + } + + if (vshCommandOptStringReq(ctl, cmd, "name", &name_option) < 0) {

+ vshError(ctl, "%s", _("Unable to parse 'name' parameter")); + goto cleanup; + } + + if (virDomainAddIOThread(dom, iothread_id, name_option, flags) < 0) + goto cleanup; + + ret = true; + + cleanup: + virDomainFree(dom); + return ret; +} + +/* + * "iothreaddel" command + */ +static const vshCmdInfo info_iothreaddel[] = { + {.name = "help", + .data = N_("delete an IOThread from the guest domain") + }, + {.name = "desc", + .data = N_("Delete an IOThread from the guest domain.") + }, + {.name = NULL} +}; + +static const vshCmdOptDef opts_iothreaddel[] = { + {.name = "domain", + .type = VSH_OT_DATA, + .flags = VSH_OFLAG_REQ, + .help = N_("domain name, id or uuid") + }, + {.name = "id", + .type = VSH_OT_INT, + .flags = VSH_OFLAG_REQ, + .help = N_("iothread_id for the IOThread to delete") + }, + {.name = "config", + .type = VSH_OT_BOOL, + .help = N_("affect next boot") + }, + {.name = "live", + .type = VSH_OT_BOOL, + .help = N_("affect running domain") + }, + {.name = "current", + .type = VSH_OT_BOOL, + .help = N_("affect current domain") + }, + {.name = NULL} +};