[libvirt] [PATCH v2 2/3] cmdDomblkinfo: add --all to show all block devices info

From: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; This patch introduces --all to show all block devices info of guests like: virsh # domblkinfo --all Target Capacity Allocation Physical --------------------------------------------------- hda 42949672960 9878110208 9878110208 vda 10737418240 10736439296 10737418240 # domblkinfo --all --human Target Capacity Allocation Physical --------------------------------------------------- hda 40.000 GiB 9.200 GiB 9.200 GiB vda 10.000 GiB 9.999 GiB 10.000 GiB Signed-off-by: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; --- v2: add support --human to --all v1.1: fix self-test tools/virsh-domain-monitor.c | 118 +++++++++++++++++++++++++++++------ tools/virsh.pod | 5 +- 2 files changed, 102 insertions(+), 21 deletions(-) diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index daa86e8310..22c0b740c6 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -388,8 +388,7 @@ static const vshCmdInfo info_domblkinfo[] = { static const vshCmdOptDef opts_domblkinfo[] = { VIRSH_COMMON_OPT_DOMAIN_FULL(0), {.name = "device", - .type = VSH_OT_DATA, - .flags = VSH_OFLAG_REQ, + .type = VSH_OT_STRING, .completer = virshDomainDiskTargetCompleter, .help = N_("block device") }, @@ -397,30 +396,71 @@ static const vshCmdOptDef opts_domblkinfo[] = { .type = VSH_OT_BOOL, .help = N_("Human readable output") }, + {.name = "all", + .type = VSH_OT_BOOL, + .help = N_("display all block devices info") + }, {.name = NULL} }; static void cmdDomblkinfoPrint(vshControl *ctl, const virDomainBlockInfo *info, - bool human) + const char *device, + bool human, bool title) { + char *cap = NULL, *alloc = NULL, *phy = NULL; + + if (title) { + vshPrintExtra(ctl, "%-10s %-15s %-15s %-15s\n", _("Target"), + _("Capacity"), _("Allocation"), _("Physical")); + vshPrintExtra(ctl, "-----------------------------" + "------------------------\n"); + return; + } + if (!human) { - vshPrint(ctl, "%-15s %llu\n", _("Capacity:"), info->capacity); - vshPrint(ctl, "%-15s %llu\n", _("Allocation:"), info->allocation); - vshPrint(ctl, "%-15s %llu\n", _("Physical:"), info->physical); + if (device) { + vshPrint(ctl, "%-10s %-15llu %-15llu %-15llu\n", device, + info->capacity, info->allocation, info->physical); + } else { + vshPrint(ctl, "%-15s %llu\n", _("Capacity:"), info->capacity); + vshPrint(ctl, "%-15s %llu\n", _("Allocation:"), info->allocation); + vshPrint(ctl, "%-15s %llu\n", _("Physical:"), info->physical); + } } else { - double val; - const char *unit; - - val = vshPrettyCapacity(info->capacity, &unit); - vshPrint(ctl, "%-15s %-.3lf %s\n", _("Capacity:"), val, unit); - val = vshPrettyCapacity(info->allocation, &unit); - vshPrint(ctl, "%-15s %-.3lf %s\n", _("Allocation:"), val, unit); - val = vshPrettyCapacity(info->physical, &unit); - vshPrint(ctl, "%-15s %-.3lf %s\n", _("Physical:"), val, unit); + double val_cap, val_alloc, val_phy; + const char *unit_cap, *unit_alloc, *unit_phy; + + val_cap = vshPrettyCapacity(info->capacity, &unit_cap); + val_alloc = vshPrettyCapacity(info->allocation, &unit_alloc); + val_phy = vshPrettyCapacity(info->physical, &unit_phy); + if (device) { + if (virAsprintf(&cap, "%.3lf %s", val_cap, unit_cap) < 0) + goto cleanup; + + if (virAsprintf(&alloc, "%.3lf %s", val_alloc, unit_alloc) < 0) + goto cleanup; + + if (virAsprintf(&phy, "%.3lf %s", val_phy, unit_phy) < 0) + goto cleanup; + + vshPrint(ctl, "%-10s %-15s %-15s %-15s\n", + device, cap, alloc, phy); + } else { + vshPrint(ctl, "%-15s %-.3lf %s\n", _("Capacity:"), + val_cap, unit_cap); + vshPrint(ctl, "%-15s %-.3lf %s\n", _("Allocation:"), + val_alloc, unit_alloc); + vshPrint(ctl, "%-15s %-.3lf %s\n", _("Physical:"), + val_phy, unit_phy); + } } + cleanup: + VIR_FREE(cap); + VIR_FREE(alloc); + VIR_FREE(phy); } static bool @@ -430,25 +470,63 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd) virDomainPtr dom; bool ret = false; bool human = false; + bool all = false; const char *device = NULL; + xmlDocPtr xmldoc = NULL; + xmlXPathContextPtr ctxt = NULL; + int ndisks; + size_t i; + xmlNodePtr *disks = NULL; + char *target = NULL; if (!(dom = virshCommandOptDomain(ctl, cmd, NULL))) return false; - if (vshCommandOptStringReq(ctl, cmd, "device", &device) < 0) - goto cleanup; - - if (virDomainGetBlockInfo(dom, device, &info, 0) < 0) + all = vshCommandOptBool(cmd, "all"); + if (!all && vshCommandOptStringQuiet(ctl, cmd, "device", &device) <= 0) { + vshError(ctl, "command 'domblkinfo' requires <device> option"); goto cleanup; + } human = vshCommandOptBool(cmd, "human"); - cmdDomblkinfoPrint(ctl, &info, human); + if (all) { + if (virshDomainGetXML(ctl, cmd, 0, &xmldoc, &ctxt) < 0) + goto cleanup; + + ndisks = virXPathNodeSet("./devices/disk", ctxt, &disks); + if (ndisks < 0) + goto cleanup; + + /* print the title */ + cmdDomblkinfoPrint(ctl, NULL, NULL, false, true); + + for (i = 0; i < ndisks; i++) { + ctxt->node = disks[i]; + target = virXPathString("string(./target/@dev)", ctxt); + + if (virDomainGetBlockInfo(dom, target, &info, 0) < 0) + goto cleanup; + + cmdDomblkinfoPrint(ctl, &info, target, human, false); + + VIR_FREE(target); + } + } else { + if (virDomainGetBlockInfo(dom, device, &info, 0) < 0) + goto cleanup; + + cmdDomblkinfoPrint(ctl, &info, NULL, human, false); + } ret = true; cleanup: virshDomainFree(dom); + VIR_FREE(target); + VIR_FREE(disks); + xmlXPathFreeContext(ctxt); + xmlFreeDoc(xmldoc); return ret; } diff --git a/tools/virsh.pod b/tools/virsh.pod index 3f3314a87e..e273011037 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -949,13 +949,16 @@ B<domstate> command says that a domain was paused due to I/O error. The B<domblkerror> command lists all block devices in error state and the error seen on each of them. -=item B<domblkinfo> I<domain> I<block-device> [I<--human>] +=item B<domblkinfo> I<domain> [I<block-device> I<--all>] [I<--human>] Get block device size info for a domain. A I<block-device> corresponds to a unique target name (<target dev='name'/>) or source file (<source file='name'/>) for one of the disk devices attached to I<domain> (see also B<domblklist> for listing these names). If I<--human> is set, the output will have a human readable output. +If I<--all> is set, the output will be a table showing all block devices +size info associated with I<domain>. +The I<--all> option takes precedence of the others. =item B<domblklist> I<domain> [I<--inactive>] [I<--details>] -- 2.17.1