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bridge: mdb: Add MDB bulk deletion support

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Implement MDB bulk deletion support in the bridge driver, allowing MDB
entries to be deleted in bulk according to provided parameters.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2023-12-17 10:32:40 +02:00 committed by David S. Miller
parent d8e81f1311
commit a6acb535af
3 changed files with 142 additions and 0 deletions
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1
net/bridge/br_device.c
View file

@ -471,6 +471,7 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_fdb_get = br_fdb_get,
.ndo_mdb_add = br_mdb_add,
.ndo_mdb_del = br_mdb_del,
.ndo_mdb_del_bulk = br_mdb_del_bulk,
.ndo_mdb_dump = br_mdb_dump,
.ndo_mdb_get = br_mdb_get,
.ndo_bridge_getlink = br_getlink,

133
net/bridge/br_mdb.c
View file

@ -1412,6 +1412,139 @@ int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
return err;
}
struct br_mdb_flush_desc {
u32 port_ifindex;
u16 vid;
u8 rt_protocol;
u8 state;
u8 state_mask;
};
static const struct nla_policy br_mdbe_attrs_del_bulk_pol[MDBE_ATTR_MAX + 1] = {
[MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
[MDBE_ATTR_STATE_MASK] = NLA_POLICY_MASK(NLA_U8, MDB_PERMANENT),
};
static int br_mdb_flush_desc_init(struct br_mdb_flush_desc *desc,
struct nlattr *tb[],
struct netlink_ext_ack *extack)
{
struct br_mdb_entry *entry = nla_data(tb[MDBA_SET_ENTRY]);
struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1];
int err;
desc->port_ifindex = entry->ifindex;
desc->vid = entry->vid;
desc->state = entry->state;
if (!tb[MDBA_SET_ENTRY_ATTRS])
return 0;
err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX,
tb[MDBA_SET_ENTRY_ATTRS],
br_mdbe_attrs_del_bulk_pol, extack);
if (err)
return err;
if (mdbe_attrs[MDBE_ATTR_STATE_MASK])
desc->state_mask = nla_get_u8(mdbe_attrs[MDBE_ATTR_STATE_MASK]);
if (mdbe_attrs[MDBE_ATTR_RTPROT])
desc->rt_protocol = nla_get_u8(mdbe_attrs[MDBE_ATTR_RTPROT]);
return 0;
}
static void br_mdb_flush_host(struct net_bridge *br,
struct net_bridge_mdb_entry *mp,
const struct br_mdb_flush_desc *desc)
{
u8 state;
if (desc->port_ifindex && desc->port_ifindex != br->dev->ifindex)
return;
if (desc->rt_protocol)
return;
state = br_group_is_l2(&mp->addr) ? MDB_PERMANENT : 0;
if (desc->state_mask && (state & desc->state_mask) != desc->state)
return;
br_multicast_host_leave(mp, true);
if (!mp->ports && netif_running(br->dev))
mod_timer(&mp->timer, jiffies);
}
static void br_mdb_flush_pgs(struct net_bridge *br,
struct net_bridge_mdb_entry *mp,
const struct br_mdb_flush_desc *desc)
{
struct net_bridge_port_group __rcu **pp;
struct net_bridge_port_group *p;
for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL;) {
u8 state;
if (desc->port_ifindex &&
desc->port_ifindex != p->key.port->dev->ifindex) {
pp = &p->next;
continue;
}
if (desc->rt_protocol && desc->rt_protocol != p->rt_protocol) {
pp = &p->next;
continue;
}
state = p->flags & MDB_PG_FLAGS_PERMANENT ? MDB_PERMANENT : 0;
if (desc->state_mask &&
(state & desc->state_mask) != desc->state) {
pp = &p->next;
continue;
}
br_multicast_del_pg(mp, p, pp);
}
}
static void br_mdb_flush(struct net_bridge *br,
const struct br_mdb_flush_desc *desc)
{
struct net_bridge_mdb_entry *mp;
spin_lock_bh(&br->multicast_lock);
/* Safe variant is not needed because entries are removed from the list
* upon group timer expiration or bridge deletion.
*/
hlist_for_each_entry(mp, &br->mdb_list, mdb_node) {
if (desc->vid && desc->vid != mp->addr.vid)
continue;
br_mdb_flush_host(br, mp, desc);
br_mdb_flush_pgs(br, mp, desc);
}
spin_unlock_bh(&br->multicast_lock);
}
int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
struct netlink_ext_ack *extack)
{
struct net_bridge *br = netdev_priv(dev);
struct br_mdb_flush_desc desc = {};
int err;
err = br_mdb_flush_desc_init(&desc, tb, extack);
if (err)
return err;
br_mdb_flush(br, &desc);
return 0;
}
static const struct nla_policy br_mdbe_attrs_get_pol[MDBE_ATTR_MAX + 1] = {
[MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
sizeof(struct in_addr),

8
net/bridge/br_private.h
View file

@ -1022,6 +1022,8 @@ int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
struct netlink_ext_ack *extack);
int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
struct netlink_ext_ack *extack);
int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
struct netlink_ext_ack *extack);
int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
struct netlink_callback *cb);
int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
@ -1430,6 +1432,12 @@ static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
return -EOPNOTSUPP;
}
static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
struct netlink_ext_ack *extack)
{
return -EOPNOTSUPP;
}
static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
struct netlink_callback *cb)
{