From: Roopa Prabhu <roprabhu@xxxxxxxxx>
This patch adds support in rtnetlink for IFLA_RX_VF_FILTERS and
IFLA_RX_FILTER get. It gets the size of the filters using
netdev_ops->get_rx_filter_addr_size and netdev_ops->get_rx_filter_vlan_size
and uses netdev_ops->get_rx_filter_addr and netdev_ops->get_rx_filter_vlan.
In case of IFLA_RX_VF_FILTERS it loops through all vf's to get the filter
data
Signed-off-by: Roopa Prabhu <roprabhu@xxxxxxxxx>
Signed-off-by: Christian Benvenuti <benve@xxxxxxxxx>
Signed-off-by: David Wang <dwang2@xxxxxxxxx>
---
net/core/rtnetlink.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 158 insertions(+), 1 deletions(-)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index a042910..ea861b4 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -475,6 +475,62 @@ static size_t rtnl_link_get_af_size(const struct net_device *dev)
return size;
}
+static size_t rtnl_vf_rx_filter_size(const struct net_device *dev, int vf)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ size_t size;
+
+ /* IFLA_RX_FILTER or IFLA_VF_RX_FILTER */
+ size = nla_total_size(sizeof(struct nlattr));
+
+ if (vf != SELF_VF)
+ size = nla_total_size(4); /* IFLA_RX_FILTER_VF */
+
+ if (ops->ndo_get_rx_filter_addr_size) {
+ size_t rx_filter_addr_size =
+ ops->ndo_get_rx_filter_addr_size(dev, vf);
+
+ if (rx_filter_addr_size)
+ /* IFLA_RX_FILTER_ADDR */
+ size += nla_total_size(sizeof(struct nlattr)) +
+ rx_filter_addr_size;
+ }
+
+ if (ops->ndo_get_rx_filter_vlan_size) {
+ size_t rx_filter_vlan_size =
+ ops->ndo_get_rx_filter_vlan_size(dev, vf);
+
+ if (rx_filter_vlan_size)
+ /* IFLA_RX_FILTER_VLAN */
+ size += nla_total_size(sizeof(struct nlattr)) +
+ rx_filter_vlan_size;
+ }
+
+ return size;
+}
+
+static size_t rtnl_rx_filter_size(const struct net_device *dev)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ int vf = SELF_VF;
+ size_t size;
+
+ if (!ops->ndo_get_rx_filter_addr_size &&
+ !ops->ndo_get_rx_filter_vlan_size)
+ return 0;
+
+ size = rtnl_vf_rx_filter_size(dev, vf); /* SELF_VF */
+
+ if (dev->dev.parent && dev_num_vf(dev->dev.parent)) {
+ /* IFLA_VF_RX_FILTERS */
+ size = nla_total_size(sizeof(struct nlattr));
+ for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++)
+ size += rtnl_vf_rx_filter_size(dev, vf);
+ }
+
+ return size;
+}
+
static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
{
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
@@ -513,6 +569,102 @@ out:
return err;
}
+static int rtnl_vf_rx_filter_fill(struct sk_buff *skb,
+ const struct net_device *dev, int vf)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ struct nlattr *addr_filter = NULL, *vlan_filter = NULL;
+ struct nlattr *rx_filter;
+ int err = -EMSGSIZE;
+ int filter_attrtype =
+ (vf == SELF_VF ? IFLA_RX_FILTER : IFLA_VF_RX_FILTER);
+
+ rx_filter = nla_nest_start(skb, filter_attrtype);
+ if (rx_filter == NULL)
+ goto nla_put_failure;
+
+ if (vf != SELF_VF)
+ NLA_PUT_U32(skb, IFLA_RX_FILTER_VF, vf);
+
+ if (ops->ndo_get_rx_filter_addr) {
+ addr_filter = nla_nest_start(skb, IFLA_RX_FILTER_ADDR);
+ if (addr_filter == NULL)
+ goto err_cancel_rx_filter;
+ err = ops->ndo_get_rx_filter_addr(dev, vf, skb);
+ if (err == -ENODATA)
+ nla_nest_cancel(skb, addr_filter);
+ else if (err < 0)
+ goto err_cancel_addr_filter;
+ else
+ nla_nest_end(skb, addr_filter);
+ }
+
+ if (ops->ndo_get_rx_filter_vlan) {
+ vlan_filter = nla_nest_start(skb, IFLA_RX_FILTER_VLAN);
+ if (vlan_filter == NULL)
+ goto err_cancel_addr_filter;
+ err = ops->ndo_get_rx_filter_vlan(dev, vf, skb);
+ if (err == -ENODATA)
+ nla_nest_cancel(skb, vlan_filter);
+ else if (err)
+ goto err_cancel_vlan_filter;
+ else
+ nla_nest_end(skb, vlan_filter);
+ }
+ nla_nest_end(skb, rx_filter);
+
+ return 0;
+
+err_cancel_vlan_filter:
+ if (vlan_filter)
+ nla_nest_cancel(skb, vlan_filter);
+err_cancel_addr_filter:
+ if (addr_filter)
+ nla_nest_cancel(skb, addr_filter);
+err_cancel_rx_filter:
+ nla_nest_cancel(skb, rx_filter);
+nla_put_failure:
+ return err;
+}
+
+static int rtnl_rx_filter_fill(struct sk_buff *skb,
+ const struct net_device *dev)
+{
+ struct nlattr *vf_rx_filters = NULL;
+ int vf = SELF_VF;
+ int err;
+
+ if (!dev->netdev_ops->ndo_get_rx_filter_addr &&
+ !dev->netdev_ops->ndo_get_rx_filter_vlan)
+ return 0;
+
+ err = rtnl_vf_rx_filter_fill(skb, dev, vf); /* SELF_VF */
+ if (err)
+ return err;
+
+ if (dev->dev.parent && dev_num_vf(dev->dev.parent)) {
+ vf_rx_filters = nla_nest_start(skb, IFLA_VF_RX_FILTERS);
+ if (!vf_rx_filters)
+ return -EMSGSIZE;
+
+ for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
+ err = rtnl_vf_rx_filter_fill(skb, dev, vf);
+ if (err == -EMSGSIZE)
+ goto err_cancel_nest_vf_rx_filters;
+ }
+
+ nla_nest_end(skb, vf_rx_filters);
+ }
+
+ return 0;
+
+err_cancel_nest_vf_rx_filters:
+ if (vf_rx_filters)
+ nla_nest_cancel(skb, vf_rx_filters);
+
+ return err;
+}
+
static const int rtm_min[RTM_NR_FAMILIES] =
{
[RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
@@ -786,7 +938,9 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev)
+ rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
+ rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
+ rtnl_link_get_size(dev) /* IFLA_LINKINFO */
- + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
+ + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
+ /* IFLA_VF_RX_FILTERS + IFLA_RX_FILTER */
+ + rtnl_rx_filter_size(dev);
}
static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
@@ -996,6 +1150,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (rtnl_port_fill(skb, dev))
goto nla_put_failure;
+ if (rtnl_rx_filter_fill(skb, dev) < 0)
+ goto nla_put_failure;
+
if (dev->rtnl_link_ops) {
if (rtnl_link_fill(skb, dev) < 0)
goto nla_put_failure;
--
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