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vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceReadIops

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-08-17 16:53:17 +02:00
parent 568f746eaf
commit 862f630825
1 changed files with 70 additions and 0 deletions
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70
src/util/vircgroupv2.c
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@ -742,6 +742,74 @@ virCgroupV2GetBlkioDeviceWeight(virCgroupPtr group,
}
static int
virCgroupV2SetBlkioDeviceReadIops(virCgroupPtr group,
const char *path,
unsigned int riops)
{
VIR_AUTOFREE(char *) str = NULL;
VIR_AUTOFREE(char *) blkstr = NULL;
if (!(blkstr = virCgroupGetBlockDevString(path)))
return -1;
if (riops == 0) {
if (virAsprintf(&str, "%sriops=max", blkstr) < 0)
return -1;
} else {
if (virAsprintf(&str, "%sriops=%u", blkstr, riops) < 0)
return -1;
}
return virCgroupSetValueStr(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
str);
}
static int
virCgroupV2GetBlkioDeviceReadIops(virCgroupPtr group,
const char *path,
unsigned int *riops)
{
VIR_AUTOFREE(char *) str = NULL;
const char *name = "riops=";
char *tmp;
if (virCgroupGetValueForBlkDev(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
path,
&str) < 0) {
return -1;
}
if (!str) {
*riops = 0;
} else {
if (!(tmp = strstr(str, name))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to find '%s' limit for block device '%s'"),
name, path);
return -1;
}
tmp += strlen(name);
if (STREQLEN(tmp, "max", 3)) {
*riops = 0;
} else if (virStrToLong_ui(tmp, NULL, 10, riops) < 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,
@ -770,6 +838,8 @@ virCgroupBackend virCgroupV2Backend = {
.getBlkioIoDeviceServiced = virCgroupV2GetBlkioIoDeviceServiced,
.setBlkioDeviceWeight = virCgroupV2SetBlkioDeviceWeight,
.getBlkioDeviceWeight = virCgroupV2GetBlkioDeviceWeight,
.setBlkioDeviceReadIops = virCgroupV2SetBlkioDeviceReadIops,
.getBlkioDeviceReadIops = virCgroupV2GetBlkioDeviceReadIops,
};