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Diffstat (limited to 'net/bridge/br_vlan.c')
-rw-r--r--net/bridge/br_vlan.c137
1 files changed, 71 insertions, 66 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 9a9ffe7e4019..af5ebd18d705 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -34,7 +34,6 @@ static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags)
static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
{
- const struct net_device_ops *ops;
struct net_bridge_port *p = NULL;
struct net_bridge *br;
struct net_device *dev;
@@ -45,37 +44,32 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
return 0;
}
- if (vid) {
- if (v->port_idx) {
- p = v->parent.port;
- br = p->br;
- dev = p->dev;
- } else {
- br = v->parent.br;
- dev = br->dev;
- }
- ops = dev->netdev_ops;
-
- if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
- /* Add VLAN to the device filter if it is supported.
- * Stricly speaking, this is not necessary now, since
- * devices are made promiscuous by the bridge, but if
- * that ever changes this code will allow tagged
- * traffic to enter the bridge.
- */
- err = ops->ndo_vlan_rx_add_vid(dev, htons(ETH_P_8021Q),
- vid);
- if (err)
- return err;
- }
+ if (v->port_idx) {
+ p = v->parent.port;
+ br = p->br;
+ dev = p->dev;
+ } else {
+ br = v->parent.br;
+ dev = br->dev;
+ }
- err = br_fdb_insert(br, p, dev->dev_addr, vid);
- if (err) {
- br_err(br, "failed insert local address into bridge "
- "forwarding table\n");
- goto out_filt;
- }
+ if (p) {
+ /* Add VLAN to the device filter if it is supported.
+ * Stricly speaking, this is not necessary now, since
+ * devices are made promiscuous by the bridge, but if
+ * that ever changes this code will allow tagged
+ * traffic to enter the bridge.
+ */
+ err = vlan_vid_add(dev, htons(ETH_P_8021Q), vid);
+ if (err)
+ return err;
+ }
+ err = br_fdb_insert(br, p, dev->dev_addr, vid);
+ if (err) {
+ br_err(br, "failed insert local address into bridge "
+ "forwarding table\n");
+ goto out_filt;
}
set_bit(vid, v->vlan_bitmap);
@@ -85,8 +79,8 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
return 0;
out_filt:
- if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
- ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
+ if (p)
+ vlan_vid_del(dev, htons(ETH_P_8021Q), vid);
return err;
}
@@ -98,13 +92,8 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid)
__vlan_delete_pvid(v, vid);
clear_bit(vid, v->untagged_bitmap);
- if (v->port_idx && vid) {
- struct net_device *dev = v->parent.port->dev;
- const struct net_device_ops *ops = dev->netdev_ops;
-
- if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
- ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
- }
+ if (v->port_idx)
+ vlan_vid_del(v->parent.port->dev, htons(ETH_P_8021Q), vid);
clear_bit(vid, v->vlan_bitmap);
v->num_vlans--;
@@ -192,6 +181,8 @@ out:
bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
struct sk_buff *skb, u16 *vid)
{
+ int err;
+
/* If VLAN filtering is disabled on the bridge, all packets are
* permitted.
*/
@@ -204,20 +195,32 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
if (!v)
return false;
- if (br_vlan_get_tag(skb, vid)) {
+ err = br_vlan_get_tag(skb, vid);
+ if (!*vid) {
u16 pvid = br_get_pvid(v);
- /* Frame did not have a tag. See if pvid is set
- * on this port. That tells us which vlan untagged
- * traffic belongs to.
+ /* Frame had a tag with VID 0 or did not have a tag.
+ * See if pvid is set on this port. That tells us which
+ * vlan untagged or priority-tagged traffic belongs to.
*/
if (pvid == VLAN_N_VID)
return false;
- /* PVID is set on this port. Any untagged ingress
- * frame is considered to belong to this vlan.
+ /* PVID is set on this port. Any untagged or priority-tagged
+ * ingress frame is considered to belong to this vlan.
*/
- __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid);
+ *vid = pvid;
+ if (likely(err))
+ /* Untagged Frame. */
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid);
+ else
+ /* Priority-tagged Frame.
+ * At this point, We know that skb->vlan_tci had
+ * VLAN_TAG_PRESENT bit and its VID field was 0x000.
+ * We update only VID field and preserve PCP field.
+ */
+ skb->vlan_tci |= pvid;
+
return true;
}
@@ -248,7 +251,9 @@ bool br_allowed_egress(struct net_bridge *br,
return false;
}
-/* Must be protected by RTNL */
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
{
struct net_port_vlans *pv = NULL;
@@ -278,7 +283,9 @@ out:
return err;
}
-/* Must be protected by RTNL */
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
int br_vlan_delete(struct net_bridge *br, u16 vid)
{
struct net_port_vlans *pv;
@@ -289,14 +296,9 @@ int br_vlan_delete(struct net_bridge *br, u16 vid)
if (!pv)
return -EINVAL;
- if (vid) {
- /* If the VID !=0 remove fdb for this vid. VID 0 is special
- * in that it's the default and is always there in the fdb.
- */
- spin_lock_bh(&br->hash_lock);
- fdb_delete_by_addr(br, br->dev->dev_addr, vid);
- spin_unlock_bh(&br->hash_lock);
- }
+ spin_lock_bh(&br->hash_lock);
+ fdb_delete_by_addr(br, br->dev->dev_addr, vid);
+ spin_unlock_bh(&br->hash_lock);
__vlan_del(pv, vid);
return 0;
@@ -329,7 +331,9 @@ unlock:
return 0;
}
-/* Must be protected by RTNL */
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
{
struct net_port_vlans *pv = NULL;
@@ -363,7 +367,9 @@ clean_up:
return err;
}
-/* Must be protected by RTNL */
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
{
struct net_port_vlans *pv;
@@ -374,14 +380,9 @@ int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
if (!pv)
return -EINVAL;
- if (vid) {
- /* If the VID !=0 remove fdb for this vid. VID 0 is special
- * in that it's the default and is always there in the fdb.
- */
- spin_lock_bh(&port->br->hash_lock);
- fdb_delete_by_addr(port->br, port->dev->dev_addr, vid);
- spin_unlock_bh(&port->br->hash_lock);
- }
+ spin_lock_bh(&port->br->hash_lock);
+ fdb_delete_by_addr(port->br, port->dev->dev_addr, vid);
+ spin_unlock_bh(&port->br->hash_lock);
return __vlan_del(pv, vid);
}
@@ -389,6 +390,7 @@ int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
void nbp_vlan_flush(struct net_bridge_port *port)
{
struct net_port_vlans *pv;
+ u16 vid;
ASSERT_RTNL();
@@ -396,6 +398,9 @@ void nbp_vlan_flush(struct net_bridge_port *port)
if (!pv)
return;
+ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
+ vlan_vid_del(port->dev, htons(ETH_P_8021Q), vid);
+
__vlan_flush(pv);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 07:36:01 +0100