提交 4b7a8e9c 编写于 作者: E Eric Blake

virsh: make vcpucount use --current consistently

Rename the existing --current flag to the new name --active,
while adding a new flag --current to expose the new
VIR_DOMAIN_AFFECT_CURRENT flag of virDomainGetVcpusFlags.

For backwards compability, the output does not change (even
though the label "current" no longer matches the spelling of
the option that would trigger that number in isolation), and
we accept "--current --live" as an undocumented synonym for
"--active --live" to avoid breaking any existing clients.

* tools/virsh.c (cmdVcpucount): Add --active flag, and rearrange
existing flag handling to expose VIR_DOMAIN_AFFECT_CURRENT support.
* tools/virsh.pod (vcpucount): Document this.
上级 59d04287
...@@ -3043,9 +3043,11 @@ static const vshCmdInfo info_vcpucount[] = { ...@@ -3043,9 +3043,11 @@ static const vshCmdInfo info_vcpucount[] = {
static const vshCmdOptDef opts_vcpucount[] = { static const vshCmdOptDef opts_vcpucount[] = {
{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")}, {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
{"maximum", VSH_OT_BOOL, 0, N_("get maximum cap on vcpus")}, {"maximum", VSH_OT_BOOL, 0, N_("get maximum cap on vcpus")},
{"current", VSH_OT_BOOL, 0, N_("get current vcpu usage")}, {"active", VSH_OT_BOOL, 0, N_("get number of currently active vcpus")},
{"config", VSH_OT_BOOL, 0, N_("get value to be used on next boot")},
{"live", VSH_OT_BOOL, 0, N_("get value from running domain")}, {"live", VSH_OT_BOOL, 0, N_("get value from running domain")},
{"config", VSH_OT_BOOL, 0, N_("get value to be used on next boot")},
{"current", VSH_OT_BOOL, 0,
N_("get value according to current domain state")},
{NULL, 0, 0, NULL} {NULL, 0, 0, NULL}
}; };
...@@ -3055,31 +3057,50 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd) ...@@ -3055,31 +3057,50 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd)
virDomainPtr dom; virDomainPtr dom;
bool ret = true; bool ret = true;
int maximum = vshCommandOptBool(cmd, "maximum"); int maximum = vshCommandOptBool(cmd, "maximum");
int current = vshCommandOptBool(cmd, "current"); int active = vshCommandOptBool(cmd, "active");
int config = vshCommandOptBool(cmd, "config"); int config = vshCommandOptBool(cmd, "config");
int live = vshCommandOptBool(cmd, "live"); int live = vshCommandOptBool(cmd, "live");
bool all = maximum + current + config + live == 0; int current = vshCommandOptBool(cmd, "current");
bool all = maximum + active + current + config + live == 0;
int count; int count;
if (maximum && current) { /* We want one of each pair of mutually exclusive options; that
vshError(ctl, "%s", * is, use of flags requires exactly two options. We reject the
_("--maximum and --current cannot both be specified")); * use of more than 2 flags later on. */
if (maximum + active + current + config + live == 1) {
if (maximum || active) {
vshError(ctl,
_("when using --%s, one of --config, --live, or --current "
"must be specified"),
maximum ? "maximum" : "active");
} else {
vshError(ctl,
_("when using --%s, either --maximum or --active must be "
"specified"),
(current ? "current" : config ? "config" : "live"));
}
return false; return false;
} }
if (config && live) {
/* Backwards compatibility: prior to 0.9.4,
* VIR_DOMAIN_AFFECT_CURRENT was unsupported, and --current meant
* the opposite of --maximum. Translate the old '--current
* --live' into the new '--active --live', while treating the new
* '--maximum --current' correctly rather than rejecting it as
* '--maximum --active'. */
if (!maximum && !active && current) {
current = false;
active = true;
}
if (maximum && active) {
vshError(ctl, "%s", vshError(ctl, "%s",
_("--config and --live cannot both be specified")); _("--maximum and --active cannot both be specified"));
return false; return false;
} }
/* We want one of each pair of mutually exclusive options; that if (current + config + live > 1) {
* is, use of flags requires exactly two options. */ vshError(ctl, "%s",
if (maximum + current + config + live == 1) { _("--config, --live, and --current are mutually exclusive"));
vshError(ctl,
_("when using --%s, either --%s or --%s must be specified"),
(maximum ? "maximum" : current ? "current"
: config ? "config" : "live"),
maximum + current ? "config" : "maximum",
maximum + current ? "live" : "current");
return false; return false;
} }
...@@ -3090,8 +3111,20 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd) ...@@ -3090,8 +3111,20 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd)
return false; return false;
/* In all cases, try the new API first; if it fails because we are /* In all cases, try the new API first; if it fails because we are
* talking to an older client, try a fallback API before giving * talking to an older client, generally we try a fallback API
* up. */ * before giving up. --current requires the new API, since we
* don't know whether the domain is running or inactive. */
if (current) {
count = virDomainGetVcpusFlags(dom,
maximum ? VIR_DOMAIN_VCPU_MAXIMUM : 0);
if (count < 0) {
virshReportError(ctl);
ret = false;
} else {
vshPrint(ctl, "%d\n", count);
}
}
if (all || (maximum && config)) { if (all || (maximum && config)) {
count = virDomainGetVcpusFlags(dom, (VIR_DOMAIN_VCPU_MAXIMUM | count = virDomainGetVcpusFlags(dom, (VIR_DOMAIN_VCPU_MAXIMUM |
VIR_DOMAIN_AFFECT_CONFIG)); VIR_DOMAIN_AFFECT_CONFIG));
...@@ -3143,7 +3176,7 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd) ...@@ -3143,7 +3176,7 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd)
last_error = NULL; last_error = NULL;
} }
if (all || (current && config)) { if (all || (active && config)) {
count = virDomainGetVcpusFlags(dom, VIR_DOMAIN_AFFECT_CONFIG); count = virDomainGetVcpusFlags(dom, VIR_DOMAIN_AFFECT_CONFIG);
if (count < 0 && (last_error->code == VIR_ERR_NO_SUPPORT if (count < 0 && (last_error->code == VIR_ERR_NO_SUPPORT
|| last_error->code == VIR_ERR_INVALID_ARG)) { || last_error->code == VIR_ERR_INVALID_ARG)) {
...@@ -3180,7 +3213,7 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd) ...@@ -3180,7 +3213,7 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd)
last_error = NULL; last_error = NULL;
} }
if (all || (current && live)) { if (all || (active && live)) {
count = virDomainGetVcpusFlags(dom, VIR_DOMAIN_AFFECT_LIVE); count = virDomainGetVcpusFlags(dom, VIR_DOMAIN_AFFECT_LIVE);
if (count < 0 && (last_error->code == VIR_ERR_NO_SUPPORT if (count < 0 && (last_error->code == VIR_ERR_NO_SUPPORT
|| last_error->code == VIR_ERR_INVALID_ARG)) { || last_error->code == VIR_ERR_INVALID_ARG)) {
......
...@@ -894,20 +894,25 @@ to undefine a domain with a managed save image will fail. ...@@ -894,20 +894,25 @@ to undefine a domain with a managed save image will fail.
NOTE: For an inactive domain, the domain name or UUID must be used as the NOTE: For an inactive domain, the domain name or UUID must be used as the
I<domain-id>. I<domain-id>.
=item B<vcpucount> I<domain-id> [{I<--maximum> | I<--current>} =item B<vcpucount> I<domain-id> [{I<--maximum> | I<--active>}
{I<--config> | I<--live>}] {I<--config> | I<--live> | I<--current>}]
Print information about the virtual cpu counts of the given Print information about the virtual cpu counts of the given
I<domain-id>. If no flags are specified, all possible counts are I<domain-id>. If no flags are specified, all possible counts are
listed in a table; otherwise, the output is limited to just the listed in a table; otherwise, the output is limited to just the
numeric value requested. numeric value requested. For historical reasons, the table
lists the label "current" on the rows that can be queried in isolation
via the I<--active> flag, rather than relating to the I<--current> flag.
I<--maximum> requests information on the maximum cap of vcpus that a I<--maximum> requests information on the maximum cap of vcpus that a
domain can add via B<setvcpus>, while I<--current> shows the current domain can add via B<setvcpus>, while I<--active> shows the current
usage; these two flags cannot both be specified. I<--config> usage; these two flags cannot both be specified. I<--config>
requests information regarding the next time the domain will be requires a persistent domain and requests information regarding the next
booted, while I<--live> requires a running domain and lists current time the domain will be booted, I<--live> requires a running domain and
values; these two flags cannot both be specified. lists current values, and I<--current> queries according to the current
state of the domain (corresponding to I<--live> if running, or
I<--config> if inactive); these three flags are mutually exclusive.
Thus, this command always takes exactly zero or two flags.
=item B<vcpuinfo> I<domain-id> =item B<vcpuinfo> I<domain-id>
......
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