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path: root/net/bridge/br_fdb.c
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Diffstat (limited to 'net/bridge/br_fdb.c')
-rw-r--r--net/bridge/br_fdb.c144
1 files changed, 101 insertions, 43 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 6f6c95cfe8f2..cc36e59db7d7 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -90,7 +90,7 @@ static void fdb_rcu_free(struct rcu_head *head)
* are then updated with the new information.
* Called under RTNL.
*/
-static void fdb_add_hw(struct net_bridge *br, const unsigned char *addr)
+static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
{
int err;
struct net_bridge_port *p;
@@ -118,7 +118,7 @@ undo:
* the ports with needed information.
* Called under RTNL.
*/
-static void fdb_del_hw(struct net_bridge *br, const unsigned char *addr)
+static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
{
struct net_bridge_port *p;
@@ -133,7 +133,7 @@ static void fdb_del_hw(struct net_bridge *br, const unsigned char *addr)
static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
{
if (f->is_static)
- fdb_del_hw(br, f->addr.addr);
+ fdb_del_hw_addr(br, f->addr.addr);
hlist_del_rcu(&f->hlist);
fdb_notify(br, f, RTM_DELNEIGH);
@@ -481,6 +481,7 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
fdb->is_local = 0;
fdb->is_static = 0;
fdb->added_by_user = 0;
+ fdb->added_by_external_learn = 0;
fdb->updated = fdb->used = jiffies;
hlist_add_head_rcu(&fdb->hlist, head);
}
@@ -514,7 +515,7 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
return -ENOMEM;
fdb->is_local = fdb->is_static = 1;
- fdb_add_hw(br, addr);
+ fdb_add_hw_addr(br, addr);
fdb_notify(br, fdb, RTM_NEWNEIGH);
return 0;
}
@@ -613,7 +614,7 @@ static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
ndm->ndm_family = AF_BRIDGE;
ndm->ndm_pad1 = 0;
ndm->ndm_pad2 = 0;
- ndm->ndm_flags = 0;
+ ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0;
ndm->ndm_type = 0;
ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
ndm->ndm_state = fdb_to_nud(fdb);
@@ -754,19 +755,19 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
fdb->is_local = 1;
if (!fdb->is_static) {
fdb->is_static = 1;
- fdb_add_hw(br, addr);
+ fdb_add_hw_addr(br, addr);
}
} else if (state & NUD_NOARP) {
fdb->is_local = 0;
if (!fdb->is_static) {
fdb->is_static = 1;
- fdb_add_hw(br, addr);
+ fdb_add_hw_addr(br, addr);
}
} else {
fdb->is_local = 0;
if (fdb->is_static) {
fdb->is_static = 0;
- fdb_del_hw(br, addr);
+ fdb_del_hw_addr(br, addr);
}
}
@@ -805,33 +806,17 @@ static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p,
/* Add new permanent fdb entry with RTM_NEWNEIGH */
int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
- const unsigned char *addr, u16 nlh_flags)
+ const unsigned char *addr, u16 vid, u16 nlh_flags)
{
struct net_bridge_port *p;
int err = 0;
struct net_port_vlans *pv;
- unsigned short vid = VLAN_N_VID;
if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
return -EINVAL;
}
- if (tb[NDA_VLAN]) {
- if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) {
- pr_info("bridge: RTM_NEWNEIGH with invalid vlan\n");
- return -EINVAL;
- }
-
- vid = nla_get_u16(tb[NDA_VLAN]);
-
- if (!vid || vid >= VLAN_VID_MASK) {
- pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d\n",
- vid);
- return -EINVAL;
- }
- }
-
if (is_zero_ether_addr(addr)) {
pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
return -EINVAL;
@@ -845,7 +830,7 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
}
pv = nbp_get_vlan_info(p);
- if (vid != VLAN_N_VID) {
+ if (vid) {
if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
pr_info("bridge: RTM_NEWNEIGH with unconfigured "
"vlan %d on port %s\n", vid, dev->name);
@@ -903,27 +888,12 @@ static int __br_fdb_delete(struct net_bridge_port *p,
/* Remove neighbor entry with RTM_DELNEIGH */
int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
- const unsigned char *addr)
+ const unsigned char *addr, u16 vid)
{
struct net_bridge_port *p;
int err;
struct net_port_vlans *pv;
- unsigned short vid = VLAN_N_VID;
- if (tb[NDA_VLAN]) {
- if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) {
- pr_info("bridge: RTM_NEWNEIGH with invalid vlan\n");
- return -EINVAL;
- }
-
- vid = nla_get_u16(tb[NDA_VLAN]);
-
- if (!vid || vid >= VLAN_VID_MASK) {
- pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d\n",
- vid);
- return -EINVAL;
- }
- }
p = br_port_get_rtnl(dev);
if (p == NULL) {
pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
@@ -932,7 +902,7 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
}
pv = nbp_get_vlan_info(p);
- if (vid != VLAN_N_VID) {
+ if (vid) {
if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
pr_info("bridge: RTM_DELNEIGH with unconfigured "
"vlan %d on port %s\n", vid, dev->name);
@@ -1014,3 +984,91 @@ void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
}
}
}
+
+int br_fdb_external_learn_add(struct net_device *dev,
+ const unsigned char *addr, u16 vid)
+{
+ struct net_bridge_port *p;
+ struct net_bridge *br;
+ struct hlist_head *head;
+ struct net_bridge_fdb_entry *fdb;
+ int err = 0;
+
+ rtnl_lock();
+
+ p = br_port_get_rtnl(dev);
+ if (!p) {
+ pr_info("bridge: %s not a bridge port\n", dev->name);
+ err = -EINVAL;
+ goto err_rtnl_unlock;
+ }
+
+ br = p->br;
+
+ spin_lock_bh(&br->hash_lock);
+
+ head = &br->hash[br_mac_hash(addr, vid)];
+ fdb = fdb_find(head, addr, vid);
+ if (!fdb) {
+ fdb = fdb_create(head, p, addr, vid);
+ if (!fdb) {
+ err = -ENOMEM;
+ goto err_unlock;
+ }
+ fdb->added_by_external_learn = 1;
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ } else if (fdb->added_by_external_learn) {
+ /* Refresh entry */
+ fdb->updated = fdb->used = jiffies;
+ } else if (!fdb->added_by_user) {
+ /* Take over SW learned entry */
+ fdb->added_by_external_learn = 1;
+ fdb->updated = jiffies;
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ }
+
+err_unlock:
+ spin_unlock_bh(&br->hash_lock);
+err_rtnl_unlock:
+ rtnl_unlock();
+
+ return err;
+}
+EXPORT_SYMBOL(br_fdb_external_learn_add);
+
+int br_fdb_external_learn_del(struct net_device *dev,
+ const unsigned char *addr, u16 vid)
+{
+ struct net_bridge_port *p;
+ struct net_bridge *br;
+ struct hlist_head *head;
+ struct net_bridge_fdb_entry *fdb;
+ int err = 0;
+
+ rtnl_lock();
+
+ p = br_port_get_rtnl(dev);
+ if (!p) {
+ pr_info("bridge: %s not a bridge port\n", dev->name);
+ err = -EINVAL;
+ goto err_rtnl_unlock;
+ }
+
+ br = p->br;
+
+ spin_lock_bh(&br->hash_lock);
+
+ head = &br->hash[br_mac_hash(addr, vid)];
+ fdb = fdb_find(head, addr, vid);
+ if (fdb && fdb->added_by_external_learn)
+ fdb_delete(br, fdb);
+ else
+ err = -ENOENT;
+
+ spin_unlock_bh(&br->hash_lock);
+err_rtnl_unlock:
+ rtnl_unlock();
+
+ return err;
+}
+EXPORT_SYMBOL(br_fdb_external_learn_del);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-10 23:34:47 +0000