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) {