[libvirt] [PATCH] virsh-domain-monitor: add human readable output for 'domblkinfo'.
The virsh command 'domblkinfo' returns the capacity, allocation and phisycal
size of the devices attached in a domain. Usually, this sizes are very big
and hard to understand and calculate. This commits introduce a human readable
support to check the size of each field easilly.
For example, the command today:
virsh # domblkinfo my_domain hda
Capacity: 21474836480
Allocation: 14875545600
Physical: 21474836480
After this patch:
virsh # domblkinfo my_domain hda --human
Capacity: 20.0G
Allocation: 13.9G
Physical: 20.0G
This commit supports Bytes, KiB and MiB too.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1330940
Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com>
---
tools/virsh-domain-monitor.c | 41 ++++++++++++++++++++++++++++++++++++++---
tools/virsh.pod | 5 +++--
2 files changed, 41 insertions(+), 5 deletions(-)
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index 3db4795..755d740 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -396,6 +396,10 @@ static const vshCmdOptDef opts_domblkinfo[] = {
.flags = VSH_OFLAG_REQ,
.help = N_("block device")
},
+ {.name = "human",
+ .type = VSH_OT_BOOL,
+ .help = N_("Human readable output")
+ },
{.name = NULL}
};
@@ -405,6 +409,7 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
virDomainBlockInfo info;
virDomainPtr dom;
bool ret = false;
+ bool human = false;
const char *device = NULL;
if (!(dom = virshCommandOptDomain(ctl, cmd, NULL)))
@@ -416,9 +421,39 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
if (virDomainGetBlockInfo(dom, device, &info, 0) < 0)
goto cleanup;
- vshPrint(ctl, "%-15s %llu\n", _("Capacity:"), info.capacity);
- vshPrint(ctl, "%-15s %llu\n", _("Allocation:"),
info.allocation);
- vshPrint(ctl, "%-15s %llu\n", _("Physical:"), info.physical);
+ human = vshCommandOptBool(cmd, "human");
+
+ 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);
+ } else {
+ double sizeCapacity = 1;
+ const char *sizeStr = "B";
+
+ /* Check if capacity can be in K. */
+ if (info.capacity >= 1024) {
+ sizeCapacity = 1024.0;
+ sizeStr = "K";
+ }
+ /* Check if capacity can be in M. */
+ if (info.capacity >= 1048576) {
+ sizeCapacity = 1048576.0;
+ sizeStr = "M";
+ }
+ /* Check if capacity can be in G. */
+ if (info.capacity >= 1073741824) {
+ sizeCapacity = 1073741824.0;
+ sizeStr = "G";
+ }
+
+ vshPrint(ctl, "%-15s %.1f%s\n", _("Capacity:"),
+ info.capacity/sizeCapacity, sizeStr);
+ vshPrint(ctl, "%-15s %.1f%s\n", _("Allocation:"),
+ info.allocation/sizeCapacity, sizeStr);
+ vshPrint(ctl, "%-15s %.1f%s\n", _("Physical:"),
+ info.physical/sizeCapacity, sizeStr);
+ }
ret = true;
diff --git a/tools/virsh.pod b/tools/virsh.pod
index e16f62f..9f67de2 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -841,12 +841,13 @@ 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>
+=item B<domblkinfo> I<domain> I<block-device> [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).
+also B<domblklist> for listing these names). If I<--human> is set, the
+output will have a human readable design.
=item B<domblklist> I<domain> [I<--inactive>] [I<--details>]
--
2.7.4