On 10/02/2018 10:44 AM, Pavel Hrdina wrote:
> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
> ---
> 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 ");
Alternatively, to avoid having to change this at two places, you can
just use #define BLKIO_WIGHT_VAL_DESC "default " or something similar.
> +
> + 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,
> };
>
>
>
ACK
Michal
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