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Diffstat (limited to 'net/bridge/br_mdb.c')
-rw-r--r--net/bridge/br_mdb.c175
1 files changed, 117 insertions, 58 deletions
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 428af1abf8cc..44594635a972 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -77,6 +77,53 @@ static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip)
#endif
}
+static int __mdb_fill_info(struct sk_buff *skb,
+ struct net_bridge_mdb_entry *mp,
+ struct net_bridge_port_group *p)
+{
+ struct timer_list *mtimer;
+ struct nlattr *nest_ent;
+ struct br_mdb_entry e;
+ u8 flags = 0;
+ int ifindex;
+
+ memset(&e, 0, sizeof(e));
+ if (p) {
+ ifindex = p->port->dev->ifindex;
+ mtimer = &p->timer;
+ flags = p->flags;
+ } else {
+ ifindex = mp->br->dev->ifindex;
+ mtimer = &mp->timer;
+ }
+
+ __mdb_entry_fill_flags(&e, flags);
+ e.ifindex = ifindex;
+ e.vid = mp->addr.vid;
+ if (mp->addr.proto == htons(ETH_P_IP))
+ e.addr.u.ip4 = mp->addr.u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (mp->addr.proto == htons(ETH_P_IPV6))
+ e.addr.u.ip6 = mp->addr.u.ip6;
+#endif
+ e.addr.proto = mp->addr.proto;
+ nest_ent = nla_nest_start_noflag(skb,
+ MDBA_MDB_ENTRY_INFO);
+ if (!nest_ent)
+ return -EMSGSIZE;
+
+ if (nla_put_nohdr(skb, sizeof(e), &e) ||
+ nla_put_u32(skb,
+ MDBA_MDB_EATTR_TIMER,
+ br_timer_value(mtimer))) {
+ nla_nest_cancel(skb, nest_ent);
+ return -EMSGSIZE;
+ }
+ nla_nest_end(skb, nest_ent);
+
+ return 0;
+}
+
static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
struct net_device *dev)
{
@@ -95,7 +142,6 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) {
struct net_bridge_port_group *p;
struct net_bridge_port_group __rcu **pp;
- struct net_bridge_port *port;
if (idx < s_idx)
goto skip;
@@ -106,43 +152,24 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
break;
}
+ if (mp->host_joined) {
+ err = __mdb_fill_info(skb, mp, NULL);
+ if (err) {
+ nla_nest_cancel(skb, nest2);
+ break;
+ }
+ }
+
for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
pp = &p->next) {
- struct nlattr *nest_ent;
- struct br_mdb_entry e;
-
- port = p->port;
- if (!port)
+ if (!p->port)
continue;
- memset(&e, 0, sizeof(e));
- e.ifindex = port->dev->ifindex;
- e.vid = p->addr.vid;
- __mdb_entry_fill_flags(&e, p->flags);
- if (p->addr.proto == htons(ETH_P_IP))
- e.addr.u.ip4 = p->addr.u.ip4;
-#if IS_ENABLED(CONFIG_IPV6)
- if (p->addr.proto == htons(ETH_P_IPV6))
- e.addr.u.ip6 = p->addr.u.ip6;
-#endif
- e.addr.proto = p->addr.proto;
- nest_ent = nla_nest_start_noflag(skb,
- MDBA_MDB_ENTRY_INFO);
- if (!nest_ent) {
- nla_nest_cancel(skb, nest2);
- err = -EMSGSIZE;
- goto out;
- }
- if (nla_put_nohdr(skb, sizeof(e), &e) ||
- nla_put_u32(skb,
- MDBA_MDB_EATTR_TIMER,
- br_timer_value(&p->timer))) {
- nla_nest_cancel(skb, nest_ent);
+ err = __mdb_fill_info(skb, mp, p);
+ if (err) {
nla_nest_cancel(skb, nest2);
- err = -EMSGSIZE;
goto out;
}
- nla_nest_end(skb, nest_ent);
}
nla_nest_end(skb, nest2);
skip:
@@ -589,6 +616,19 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
return err;
}
+ /* host join */
+ if (!port) {
+ /* don't allow any flags for host-joined groups */
+ if (state)
+ return -EINVAL;
+ if (mp->host_joined)
+ return -EEXIST;
+
+ br_multicast_host_join(mp, false);
+
+ return 0;
+ }
+
for (pp = &mp->ports;
(p = mlock_dereference(*pp, br)) != NULL;
pp = &p->next) {
@@ -613,19 +653,21 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br,
{
struct br_ip ip;
struct net_device *dev;
- struct net_bridge_port *p;
+ struct net_bridge_port *p = NULL;
int ret;
if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
return -EINVAL;
- dev = __dev_get_by_index(net, entry->ifindex);
- if (!dev)
- return -ENODEV;
+ if (entry->ifindex != br->dev->ifindex) {
+ dev = __dev_get_by_index(net, entry->ifindex);
+ if (!dev)
+ return -ENODEV;
- p = br_port_get_rtnl(dev);
- if (!p || p->br != br || p->state == BR_STATE_DISABLED)
- return -EINVAL;
+ p = br_port_get_rtnl(dev);
+ if (!p || p->br != br || p->state == BR_STATE_DISABLED)
+ return -EINVAL;
+ }
__mdb_entry_to_br_ip(entry, &ip);
@@ -640,9 +682,9 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
{
struct net *net = sock_net(skb->sk);
struct net_bridge_vlan_group *vg;
+ struct net_bridge_port *p = NULL;
struct net_device *dev, *pdev;
struct br_mdb_entry *entry;
- struct net_bridge_port *p;
struct net_bridge_vlan *v;
struct net_bridge *br;
int err;
@@ -653,18 +695,22 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
br = netdev_priv(dev);
+ if (entry->ifindex != br->dev->ifindex) {
+ pdev = __dev_get_by_index(net, entry->ifindex);
+ if (!pdev)
+ return -ENODEV;
+
+ p = br_port_get_rtnl(pdev);
+ if (!p || p->br != br || p->state == BR_STATE_DISABLED)
+ return -EINVAL;
+ vg = nbp_vlan_group(p);
+ } else {
+ vg = br_vlan_group(br);
+ }
+
/* If vlan filtering is enabled and VLAN is not specified
* install mdb entry on all vlans configured on the port.
*/
- pdev = __dev_get_by_index(net, entry->ifindex);
- if (!pdev)
- return -ENODEV;
-
- p = br_port_get_rtnl(pdev);
- if (!p || p->br != br || p->state == BR_STATE_DISABLED)
- return -EINVAL;
-
- vg = nbp_vlan_group(p);
if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) {
list_for_each_entry(v, &vg->vlan_list, vlist) {
entry->vid = v->vid;
@@ -700,6 +746,15 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
if (!mp)
goto unlock;
+ /* host leave */
+ if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) {
+ br_multicast_host_leave(mp, false);
+ err = 0;
+ if (!mp->ports && netif_running(br->dev))
+ mod_timer(&mp->timer, jiffies);
+ goto unlock;
+ }
+
for (pp = &mp->ports;
(p = mlock_dereference(*pp, br)) != NULL;
pp = &p->next) {
@@ -732,9 +787,9 @@ static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
{
struct net *net = sock_net(skb->sk);
struct net_bridge_vlan_group *vg;
+ struct net_bridge_port *p = NULL;
struct net_device *dev, *pdev;
struct br_mdb_entry *entry;
- struct net_bridge_port *p;
struct net_bridge_vlan *v;
struct net_bridge *br;
int err;
@@ -745,18 +800,22 @@ static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
br = netdev_priv(dev);
+ if (entry->ifindex != br->dev->ifindex) {
+ pdev = __dev_get_by_index(net, entry->ifindex);
+ if (!pdev)
+ return -ENODEV;
+
+ p = br_port_get_rtnl(pdev);
+ if (!p || p->br != br || p->state == BR_STATE_DISABLED)
+ return -EINVAL;
+ vg = nbp_vlan_group(p);
+ } else {
+ vg = br_vlan_group(br);
+ }
+
/* If vlan filtering is enabled and VLAN is not specified
* delete mdb entry on all vlans configured on the port.
*/
- pdev = __dev_get_by_index(net, entry->ifindex);
- if (!pdev)
- return -ENODEV;
-
- p = br_port_get_rtnl(pdev);
- if (!p || p->br != br || p->state == BR_STATE_DISABLED)
- return -EINVAL;
-
- vg = nbp_vlan_group(p);
if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) {
list_for_each_entry(v, &vg->vlan_list, vlist) {
entry->vid = v->vid;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.