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vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceWriteIops

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-08-17 16:53:45 +02:00
parent 862f630825
commit 438587033b
1 changed files with 70 additions and 0 deletions
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70
src/util/vircgroupv2.c
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@ -810,6 +810,74 @@ virCgroupV2GetBlkioDeviceReadIops(virCgroupPtr group,
}
static int
virCgroupV2SetBlkioDeviceWriteIops(virCgroupPtr group,
const char *path,
unsigned int wiops)
{
VIR_AUTOFREE(char *) str = NULL;
VIR_AUTOFREE(char *) blkstr = NULL;
if (!(blkstr = virCgroupGetBlockDevString(path)))
return -1;
if (wiops == 0) {
if (virAsprintf(&str, "%swiops=max", blkstr) < 0)
return -1;
} else {
if (virAsprintf(&str, "%swiops=%u", blkstr, wiops) < 0)
return -1;
}
return virCgroupSetValueStr(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
str);
}
static int
virCgroupV2GetBlkioDeviceWriteIops(virCgroupPtr group,
const char *path,
unsigned int *wiops)
{
VIR_AUTOFREE(char *) str = NULL;
const char *name = "wiops=";
char *tmp;
if (virCgroupGetValueForBlkDev(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
path,
&str) < 0) {
return -1;
}
if (!str) {
*wiops = 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)) {
*wiops = 0;
} else if (virStrToLong_ui(tmp, NULL, 10, wiops) < 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,
@ -840,6 +908,8 @@ virCgroupBackend virCgroupV2Backend = {
.getBlkioDeviceWeight = virCgroupV2GetBlkioDeviceWeight,
.setBlkioDeviceReadIops = virCgroupV2SetBlkioDeviceReadIops,
.getBlkioDeviceReadIops = virCgroupV2GetBlkioDeviceReadIops,
.setBlkioDeviceWriteIops = virCgroupV2SetBlkioDeviceWriteIops,
.getBlkioDeviceWriteIops = virCgroupV2GetBlkioDeviceWriteIops,
};