struct cfq_group *cfqg;
struct cfq_group_data *cfqgd;
int ret;
+ u64 v;
ret = blkg_conf_prep(blkcg, &blkcg_policy_cfq, buf, &ctx);
if (ret)
return ret;
+ ret = -EINVAL;
+ if (sscanf(ctx.body, "%llu", &v) != 1)
+ goto out_finish;
+
cfqg = blkg_to_cfqg(ctx.blkg);
cfqgd = blkcg_to_cfqgd(blkcg);
ret = -ERANGE;
- if (!ctx.v || (ctx.v >= CFQ_WEIGHT_MIN && ctx.v <= CFQ_WEIGHT_MAX)) {
+ if (!v || (v >= CFQ_WEIGHT_MIN && v <= CFQ_WEIGHT_MAX)) {
if (!is_leaf_weight) {
- cfqg->dev_weight = ctx.v;
- cfqg->new_weight = ctx.v ?: cfqgd->weight;
+ cfqg->dev_weight = v;
+ cfqg->new_weight = v ?: cfqgd->weight;
} else {
- cfqg->dev_leaf_weight = ctx.v;
- cfqg->new_leaf_weight = ctx.v ?: cfqgd->leaf_weight;
+ cfqg->dev_leaf_weight = v;
+ cfqg->new_leaf_weight = v ?: cfqgd->leaf_weight;
}
ret = 0;
}
-
+out_finish:
blkg_conf_finish(&ctx);
return ret ?: nbytes;
}