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vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceReadBps

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2018-08-17 16:54:11 +02:00
parent 438587033b
commit 353ce9453e
1 changed files with 70 additions and 0 deletions
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70
src/util/vircgroupv2.c
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@ -878,6 +878,74 @@ virCgroupV2GetBlkioDeviceWriteIops(virCgroupPtr group,
}
static int
virCgroupV2SetBlkioDeviceReadBps(virCgroupPtr group,
const char *path,
unsigned long long rbps)
{
VIR_AUTOFREE(char *) str = NULL;
VIR_AUTOFREE(char *) blkstr = NULL;
if (!(blkstr = virCgroupGetBlockDevString(path)))
return -1;
if (rbps == 0) {
if (virAsprintf(&str, "%srbps=max", blkstr) < 0)
return -1;
} else {
if (virAsprintf(&str, "%srbps=%llu", blkstr, rbps) < 0)
return -1;
}
return virCgroupSetValueStr(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
str);
}
static int
virCgroupV2GetBlkioDeviceReadBps(virCgroupPtr group,
const char *path,
unsigned long long *rbps)
{
VIR_AUTOFREE(char *) str = NULL;
const char *name = "rbps=";
char *tmp;
if (virCgroupGetValueForBlkDev(group,
VIR_CGROUP_CONTROLLER_BLKIO,
"io.max",
path,
&str) < 0) {
return -1;
}
if (!str) {
*rbps = 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)) {
*rbps = 0;
} else if (virStrToLong_ull(tmp, NULL, 10, rbps) < 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,
@ -910,6 +978,8 @@ virCgroupBackend virCgroupV2Backend = {
.getBlkioDeviceReadIops = virCgroupV2GetBlkioDeviceReadIops,
.setBlkioDeviceWriteIops = virCgroupV2SetBlkioDeviceWriteIops,
.getBlkioDeviceWriteIops = virCgroupV2GetBlkioDeviceWriteIops,
.setBlkioDeviceReadBps = virCgroupV2SetBlkioDeviceReadBps,
.getBlkioDeviceReadBps = virCgroupV2GetBlkioDeviceReadBps,
};