Re: [libvirt] [PATCH 21/53] vircgroup: introduce virCgroupV2SetBlkioWeight

Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- src/util/vircgroupv2.c | 49 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c index fec5d28835..3e2cd16335 100644 --- a/src/util/vircgroupv2.c +++ b/src/util/vircgroupv2.c @@ -546,6 +546,52 @@ virCgroupV2SetOwner(virCgroupPtr cgroup, } +static int +virCgroupV2SetBlkioWeight(virCgroupPtr group, + unsigned int weight) +{ + VIR_AUTOFREE(char *) value = NULL; + + if (virAsprintf(&value, "default %u", weight) < 0) + return -1; + + return virCgroupSetValueStr(group, + VIR_CGROUP_CONTROLLER_BLKIO, + "io.weight", + value); +} + + +static int +virCgroupV2GetBlkioWeight(virCgroupPtr group, + unsigned int *weight) +{ + VIR_AUTOFREE(char *) value = NULL; + char *tmp; + + if (virCgroupGetValueStr(group, VIR_CGROUP_CONTROLLER_BLKIO, + "io.weight", &value) < 0) { + return -1; + } + + if (!(tmp = strstr(value, "default "))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Cannot find default io weight.")); + return -1; + } + tmp += strlen("default ");

+ + if (virStrToLong_ui(tmp, NULL, 10, weight) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Unable to parse '%s' as an integer"), + tmp); + return -1; + } + + return 0; +} + + virCgroupBackend virCgroupV2Backend = { .type = VIR_CGROUP_BACKEND_TYPE_V2, @@ -567,6 +613,9 @@ virCgroupBackend virCgroupV2Backend = { .hasEmptyTasks = virCgroupV2HasEmptyTasks, .bindMount = virCgroupV2BindMount, .setOwner = virCgroupV2SetOwner, + + .setBlkioWeight = virCgroupV2SetBlkioWeight, + .getBlkioWeight = virCgroupV2GetBlkioWeight, };