diff options
author | Nikolay Aleksandrov <nikolay@cumulusnetworks.com> | 2019-08-17 13:22:13 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-08-17 21:36:57 +0200 |
commit | 1bc844ee0faa1b92e3ede00bdd948021c78d7088 (patch) | |
tree | fccde8ba8ab57d8c3a471f78a55f10399a62dd08 | |
parent | net: bridge: mdb: dump host-joined entries as well (diff) | |
download | linux-1bc844ee0faa1b92e3ede00bdd948021c78d7088.tar.xz linux-1bc844ee0faa1b92e3ede00bdd948021c78d7088.zip |
net: bridge: mdb: allow add/delete for host-joined groups
Currently this is needed only for user-space compatibility, so similar
object adds/deletes as the dumped ones would succeed. Later it can be
used for L2 mcast MAC add/delete.
v3: fix compiler warning (DaveM)
v2: don't send a notification when used from user-space, arm the group
timer if no ports are left after host entry del
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | net/bridge/br_mdb.c | 78 | ||||
-rw-r--r-- | net/bridge/br_multicast.c | 30 | ||||
-rw-r--r-- | net/bridge/br_private.h | 2 |
3 files changed, 80 insertions, 30 deletions
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index 985273425117..44594635a972 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -616,6 +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) { @@ -640,19 +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); @@ -667,9 +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; @@ -680,15 +695,19 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, br = netdev_priv(dev); - pdev = __dev_get_by_index(net, entry->ifindex); - if (!pdev) - return -ENODEV; + 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; + 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); + } - vg = nbp_vlan_group(p); /* If vlan filtering is enabled and VLAN is not specified * install mdb entry on all vlans configured on the port. */ @@ -727,6 +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) { @@ -759,9 +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; @@ -772,15 +800,19 @@ static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, br = netdev_priv(dev); - pdev = __dev_get_by_index(net, entry->ifindex); - if (!pdev) - return -ENODEV; + 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; + 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); + } - vg = nbp_vlan_group(p); /* If vlan filtering is enabled and VLAN is not specified * delete mdb entry on all vlans configured on the port. */ diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 9b379e110129..ad12fe3fca8c 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -148,8 +148,7 @@ static void br_multicast_group_expired(struct timer_list *t) if (!netif_running(br->dev) || timer_pending(&mp->timer)) goto out; - mp->host_joined = false; - br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); + br_multicast_host_leave(mp, true); if (mp->ports) goto out; @@ -512,6 +511,27 @@ static bool br_port_group_equal(struct net_bridge_port_group *p, return ether_addr_equal(src, p->eth_addr); } +void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify) +{ + if (!mp->host_joined) { + mp->host_joined = true; + if (notify) + br_mdb_notify(mp->br->dev, NULL, &mp->addr, + RTM_NEWMDB, 0); + } + mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval); +} + +void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify) +{ + if (!mp->host_joined) + return; + + mp->host_joined = false; + if (notify) + br_mdb_notify(mp->br->dev, NULL, &mp->addr, RTM_DELMDB, 0); +} + static int br_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, struct br_ip *group, @@ -534,11 +554,7 @@ static int br_multicast_add_group(struct net_bridge *br, goto err; if (!port) { - if (!mp->host_joined) { - mp->host_joined = true; - br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); - } - mod_timer(&mp->timer, now + br->multicast_membership_interval); + br_multicast_host_join(mp, true); goto out; } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index b7a4942ff1b3..ce2ab14ee605 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -702,6 +702,8 @@ void br_multicast_get_stats(const struct net_bridge *br, struct br_mcast_stats *dest); void br_mdb_init(void); void br_mdb_uninit(void); +void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); +void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); #define mlock_dereference(X, br) \ rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) |