1 files changed, 101 insertions, 0 deletions

diff --git a/net/shaper/shaper.c b/net/shaper/shaper.c
index f9399984165a..15463062fe7b 100644
--- a/net/shaper/shaper.c
+++ b/net/shaper/shaper.c
@@ -439,6 +439,74 @@ static int net_shaper_parse_handle(const struct nlattr *attr,
 	return 0;
 }
 
+static int net_shaper_validate_caps(struct net_shaper_binding *binding,
+				    struct nlattr **tb,
+				    const struct genl_info *info,
+				    struct net_shaper *shaper)
+{
+	const struct net_shaper_ops *ops = net_shaper_ops(binding);
+	struct nlattr *bad = NULL;
+	unsigned long caps = 0;
+
+	ops->capabilities(binding, shaper->handle.scope, &caps);
+
+	if (tb[NET_SHAPER_A_PRIORITY] &&
+	    !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_PRIORITY)))
+		bad = tb[NET_SHAPER_A_PRIORITY];
+	if (tb[NET_SHAPER_A_WEIGHT] &&
+	    !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_WEIGHT)))
+		bad = tb[NET_SHAPER_A_WEIGHT];
+	if (tb[NET_SHAPER_A_BW_MIN] &&
+	    !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MIN)))
+		bad = tb[NET_SHAPER_A_BW_MIN];
+	if (tb[NET_SHAPER_A_BW_MAX] &&
+	    !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX)))
+		bad = tb[NET_SHAPER_A_BW_MAX];
+	if (tb[NET_SHAPER_A_BURST] &&
+	    !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BURST)))
+		bad = tb[NET_SHAPER_A_BURST];
+
+	if (!caps)
+		bad = tb[NET_SHAPER_A_HANDLE];
+
+	if (bad) {
+		NL_SET_BAD_ATTR(info->extack, bad);
+		return -EOPNOTSUPP;
+	}
+
+	if (shaper->handle.scope == NET_SHAPER_SCOPE_QUEUE &&
+	    binding->type == NET_SHAPER_BINDING_TYPE_NETDEV &&
+	    shaper->handle.id >= binding->netdev->real_num_tx_queues) {
+		NL_SET_ERR_MSG_FMT(info->extack,
+				   "Not existing queue id %d max %d",
+				   shaper->handle.id,
+				   binding->netdev->real_num_tx_queues);
+		return -ENOENT;
+	}
+
+	/* The metric is really used only if there is *any* rate-related
+	 * setting, either in current attributes set or in pre-existing
+	 * values.
+	 */
+	if (shaper->burst || shaper->bw_min || shaper->bw_max) {
+		u32 metric_cap = NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS +
+				 shaper->metric;
+
+		/* The metric test can fail even when the user did not
+		 * specify the METRIC attribute. Pointing to rate related
+		 * attribute will be confusing, as the attribute itself
+		 * could be indeed supported, with a different metric.
+		 * Be more specific.
+		 */
+		if (!(caps & BIT(metric_cap))) {
+			NL_SET_ERR_MSG_FMT(info->extack, "Bad metric %d",
+					   shaper->metric);
+			return -EOPNOTSUPP;
+		}
+	}
+	return 0;
+}
+
 static int net_shaper_parse_info(struct net_shaper_binding *binding,
 				 struct nlattr **tb,
 				 const struct genl_info *info,
@@ -487,6 +555,28 @@ static int net_shaper_parse_info(struct net_shaper_binding *binding,
 
 	if (tb[NET_SHAPER_A_WEIGHT])
 		shaper->weight = nla_get_u32(tb[NET_SHAPER_A_WEIGHT]);
+
+	ret = net_shaper_validate_caps(binding, tb, info, shaper);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int net_shaper_validate_nesting(struct net_shaper_binding *binding,
+				       const struct net_shaper *shaper,
+				       struct netlink_ext_ack *extack)
+{
+	const struct net_shaper_ops *ops = net_shaper_ops(binding);
+	unsigned long caps = 0;
+
+	ops->capabilities(binding, shaper->handle.scope, &caps);
+	if (!(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_NESTING))) {
+		NL_SET_ERR_MSG_FMT(extack,
+				   "Nesting not supported for scope %d",
+				   shaper->handle.scope);
+		return -EOPNOTSUPP;
+	}
 	return 0;
 }
 
@@ -517,6 +607,13 @@ static int net_shaper_parse_leaf(struct net_shaper_binding *binding,
 		return -EINVAL;
 	}
 
+	if (node->handle.scope == NET_SHAPER_SCOPE_NODE) {
+		ret = net_shaper_validate_nesting(binding, shaper,
+						  info->extack);
+		if (ret < 0)
+			return ret;
+	}
+
 	if (!exists)
 		net_shaper_default_parent(&shaper->handle, &shaper->parent);
 	return 0;
@@ -858,6 +955,10 @@ static int __net_shaper_group(struct net_shaper_binding *binding,
 					   node->parent.scope, node->parent.id);
 			return -ENOENT;
 		}
+
+		ret = net_shaper_validate_nesting(binding, node, extack);
+		if (ret < 0)
+			return ret;
 	}
 
 	if (update_node) {