Using the RTM_GETLINK dump the vlan filter list of a given
bridge port. The information depends on setting the filter
flag similar to how nic VF info is dumped.
Signed-off-by: Vlad Yasevich <vyasevic@xxxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +-
include/linux/netdevice.h | 3 +-
include/uapi/linux/rtnetlink.h | 1 +
net/bridge/br_netlink.c | 111 ++++++++++++++++++++++---
net/bridge/br_private.h | 3 +-
net/bridge/br_vlan.c | 2 +
net/core/rtnetlink.c | 16 +++-
7 files changed, 121 insertions(+), 18 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ec97efe..2f2a8e0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7062,7 +7062,8 @@ static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
}
static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev)
+ struct net_device *dev,
+ u32 filter_mask)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
u16 mode;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index eb7a45f..178d297 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1017,7 +1017,8 @@ struct net_device_ops {
struct nlmsghdr *nlh);
int (*ndo_bridge_getlink)(struct sk_buff *skb,
u32 pid, u32 seq,
- struct net_device *dev);
+ struct net_device *dev,
+ u32 filter_mask);
int (*ndo_bridge_dellink)(struct net_device *dev,
struct nlmsghdr *nlh);
int (*ndo_change_carrier)(struct net_device *dev,
diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 7a5eb19..7a2144e 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -630,6 +630,7 @@ struct tcamsg {
/* New extended info filters for IFLA_EXT_MASK */
#define RTEXT_FILTER_VF (1 << 0)
+#define RTEXT_FILTER_BRVLAN (1 << 1)
/* End of information exported to user level */
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 1dbfcf3..4007813 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -65,15 +65,21 @@ static int br_port_fill_attrs(struct sk_buff *skb,
* Create one netlink message for one interface
* Contains port and master info as well as carrier and bridge state.
*/
-static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *port,
- u32 pid, u32 seq, int event, unsigned int flags)
+static int br_fill_ifinfo(struct sk_buff *skb,
+ const struct net_bridge_port *port,
+ u32 pid, u32 seq, int event, unsigned int flags,
+ u32 filter_mask, const struct net_device *dev)
{
- const struct net_bridge *br = port->br;
- const struct net_device *dev = port->dev;
+ const struct net_bridge *br;
struct ifinfomsg *hdr;
struct nlmsghdr *nlh;
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+ if (port)
+ br = port->br;
+ else
+ br = netdev_priv(dev);
+
br_debug(br, "br_fill_info event %d port %s master %s\n",
event, dev->name, br->dev->name);
@@ -99,7 +105,7 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
goto nla_put_failure;
- if (event == RTM_NEWLINK) {
+ if (event == RTM_NEWLINK && port) {
struct nlattr *nest
= nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
@@ -108,6 +114,52 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por
nla_nest_end(skb, nest);
}
+ /* Check if the VID information is requested */
+ if (filter_mask & RTEXT_FILTER_BRVLAN) {
+ struct nlattr *af;
+ struct net_port_vlan *pve;
+ const struct net_port_vlans *v;
+ struct bridge_vlan_info vinfo;
+ struct net_bridge_vlan *vlan;
+ u16 pvid = BR_INVALID_VID;
+
+ if (port)
+ v = &port->vlan_info;
+ else
+ v = &br->vlan_info;
+
+ if (list_empty(&v->vlan_list))
+ goto done;
+
+ vlan = rtnl_dereference(v->pvlan);
+ if (vlan)
+ pvid = vlan->vid;
+
+ af = nla_nest_start(skb, IFLA_AF_SPEC);
+ if (!af)
+ goto nla_put_failure;
+
+ list_for_each_entry_rcu(pve, &v->vlan_list, list) {
+ if (pve->vid == BR_INVALID_VID)
+ continue;
+
+ vinfo.vid = pve->vid;
+ vinfo.flags = 0;
+ if (vinfo.vid == pvid)
+ vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
+ vlan = rtnl_dereference(pve->vlan);
+ if (test_bit(v->port_idx, vlan->untagged_bitmap))
+ vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ goto nla_put_failure;
+ }
+
+ nla_nest_end(skb, af);
+ }
+
+done:
return nlmsg_end(skb, nlh);
nla_put_failure:
@@ -135,7 +187,7 @@ void br_ifinfo_notify(int event, struct net_bridge_port *port)
if (skb == NULL)
goto errout;
- err = br_fill_ifinfo(skb, port, 0, 0, event, 0);
+ err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
if (err < 0) {
/* -EMSGSIZE implies BUG in br_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@@ -154,16 +206,17 @@ errout:
* Dump information about all ports, in response to GETLINK
*/
int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev)
+ struct net_device *dev, u32 filter_mask)
{
int err = 0;
struct net_bridge_port *port = br_port_get_rcu(dev);
- /* not a bridge port */
- if (!port)
+ /* not a bridge port and */
+ if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
goto out;
- err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI);
+ err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
+ filter_mask, dev);
out:
return err;
}
@@ -390,6 +443,26 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
return 0;
}
+static size_t br_get_link_af_size(const struct net_device *dev)
+{
+ struct net_port_vlans *pv;
+
+ if (br_port_exists(dev))
+ pv = &(br_port_get_rcu(dev))->vlan_info;
+ else if (dev->priv_flags & IFF_EBRIDGE)
+ pv = &((struct net_bridge *)netdev_priv(dev))->vlan_info;
+ else
+ return 0;
+
+ /* Each VLAN is returned in bridge_vlan_info along with flags */
+ return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+struct rtnl_af_ops br_af_ops = {
+ .family = AF_BRIDGE,
+ .get_link_af_size = br_get_link_af_size,
+};
+
struct rtnl_link_ops br_link_ops __read_mostly = {
.kind = "bridge",
.priv_size = sizeof(struct net_bridge),
@@ -400,10 +473,26 @@ struct rtnl_link_ops br_link_ops __read_mostly = {
int __init br_netlink_init(void)
{
- return rtnl_link_register(&br_link_ops);
+ int err;
+
+ err = rtnl_af_register(&br_af_ops);
+ if (err)
+ goto out;
+
+ err = rtnl_link_register(&br_link_ops);
+ if (err)
+ goto out_af;
+
+ return 0;
+
+out_af:
+ rtnl_af_unregister(&br_af_ops);
+out:
+ return err;
}
void __exit br_netlink_fini(void)
{
+ rtnl_af_unregister(&br_af_ops);
rtnl_link_unregister(&br_link_ops);
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 46f8bdc..2dd91a5 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -89,6 +89,7 @@ struct net_port_vlan {
struct net_port_vlans {
u16 port_idx;
+ u16 num_vlans;
struct list_head vlan_list;
struct net_bridge_vlan __rcu *pvlan;
};
@@ -741,7 +742,7 @@ extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev);
+ struct net_device *dev, u32 filter_mask);
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 40ef79f..efb3534 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -387,6 +387,7 @@ int nbp_vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
set_bit(v->port_idx, vlan->port_bitmap);
list_add_tail_rcu(&pve->list, &v->vlan_list);
+ v->num_vlans++;
err = nbp_vlan_do_flags(v, vlan, flags);
if (err)
@@ -463,6 +464,7 @@ int nbp_vlan_delete(struct net_port_vlans *v, u16 vid)
br_vlan_put(vlan);
list_del_rcu(&pve->list);
+ v->num_vlans--;
kfree_rcu(pve, rcu);
br_vlan_del(vlan);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 87b07d8..257b73e 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2326,6 +2326,13 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
int idx = 0;
u32 portid = NETLINK_CB(cb->skb).portid;
u32 seq = cb->nlh->nlmsg_seq;
+ struct nlattr *extfilt;
+ u32 filter_mask = 0;
+
+ extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg),
+ IFLA_EXT_MASK);
+ if (extfilt)
+ filter_mask = nla_get_u32(extfilt);
rcu_read_lock();
for_each_netdev_rcu(net, dev) {
@@ -2335,14 +2342,15 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
br_dev->netdev_ops->ndo_bridge_getlink(
- skb, portid, seq, dev) < 0)
+ skb, portid, seq, dev, filter_mask) < 0)
break;
idx++;
}
if (ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
- ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
+ ops->ndo_bridge_getlink(skb, portid, seq, dev,
+ filter_mask) < 0)
break;
idx++;
}
@@ -2383,14 +2391,14 @@ static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
- err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
+ err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
if (err < 0)
goto errout;
}
if ((flags & BRIDGE_FLAGS_SELF) &&
dev->netdev_ops->ndo_bridge_getlink) {
- err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
+ err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
if (err < 0)
goto errout;
}
--
1.7.7.6
