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vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceWeight

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-08-17 16:52:50 +02:00
parent 93fa369df5
commit 568f746eaf
1 changed files with 51 additions and 0 deletions
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51
src/util/vircgroupv2.c
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@ -693,6 +693,55 @@ virCgroupV2GetBlkioIoDeviceServiced(virCgroupPtr group,
}
static int
virCgroupV2SetBlkioDeviceWeight(virCgroupPtr group,
const char *path,
unsigned int weight)
{
VIR_AUTOFREE(char *) str = NULL;
VIR_AUTOFREE(char *) blkstr = NULL;
if (!(blkstr = virCgroupGetBlockDevString(path)))
return -1;
if (virAsprintf(&str, "%s%d", blkstr, weight) < 0)
return -1;
return virCgroupSetValueStr(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.weight",
str);
}
static int
virCgroupV2GetBlkioDeviceWeight(virCgroupPtr group,
const char *path,
unsigned int *weight)
{
VIR_AUTOFREE(char *) str = NULL;
if (virCgroupGetValueForBlkDev(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.weight",
path,
&str) < 0) {
return -1;
}
if (!str) {
*weight = 0;
} else if (virStrToLong_ui(str, NULL, 10, weight) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse '%s' as an integer"),
str);
return -1;
}
return 0;
}
virCgroupBackend virCgroupV2Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V2,
@ -719,6 +768,8 @@ virCgroupBackend virCgroupV2Backend = {
.getBlkioWeight = virCgroupV2GetBlkioWeight,
.getBlkioIoServiced = virCgroupV2GetBlkioIoServiced,
.getBlkioIoDeviceServiced = virCgroupV2GetBlkioIoDeviceServiced,
.setBlkioDeviceWeight = virCgroupV2SetBlkioDeviceWeight,
.getBlkioDeviceWeight = virCgroupV2GetBlkioDeviceWeight,
};