[libvirt] [PATCH v2 25/53] [ACKED] vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceWriteIops
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupv2.c | 70 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index a6f8799311..3017a9457e 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -819,6 +819,74 @@ 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,
@@ -849,6 +917,8 @@ virCgroupBackend virCgroupV2Backend = {
.getBlkioDeviceWeight = virCgroupV2GetBlkioDeviceWeight,
.setBlkioDeviceReadIops = virCgroupV2SetBlkioDeviceReadIops,
.getBlkioDeviceReadIops = virCgroupV2GetBlkioDeviceReadIops,
+ .setBlkioDeviceWriteIops = virCgroupV2SetBlkioDeviceWriteIops,
+ .getBlkioDeviceWriteIops = virCgroupV2GetBlkioDeviceWriteIops,
};
--
2.17.1