diff options
| author | Nikolay Aleksandrov <nikolay@nvidia.com> | 2020-09-22 10:30:18 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-23 13:24:34 -0700 |
| commit | 9c4258c78a2a7624c79b797f40ae2dbfd2555e26 (patch) | |
| tree | b6b2592868c136b99f98412483a73b7380bd23a0 | |
| parent | eab3227b1240bdcc06c0a01a3fc5bfd2bc12f406 (diff) | |
| download | bpf-next-9c4258c78a2a7624c79b797f40ae2dbfd2555e26.tar.gz | |
net: bridge: mdb: add support to extend add/del commands
Since the MDB add/del code expects an exact struct br_mdb_entry we can't
really add any extensions, thus add a new nested attribute at the level of
MDBA_SET_ENTRY called MDBA_SET_ENTRY_ATTRS which will be used to pass
all new options via netlink attributes. This patch doesn't change
anything functionally since the new attribute is not used yet, only
parsed.
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/uapi/linux/if_bridge.h | 12 | ||||
| -rw-r--r-- | net/bridge/br_mdb.c | 22 |
2 files changed, 31 insertions, 3 deletions
diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index 75a2ac479247f6..dc52f8cffa0d91 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -530,10 +530,22 @@ struct br_mdb_entry { enum { MDBA_SET_ENTRY_UNSPEC, MDBA_SET_ENTRY, + MDBA_SET_ENTRY_ATTRS, __MDBA_SET_ENTRY_MAX, }; #define MDBA_SET_ENTRY_MAX (__MDBA_SET_ENTRY_MAX - 1) +/* [MDBA_SET_ENTRY_ATTRS] = { + * [MDBE_ATTR_xxx] + * ... + * } + */ +enum { + MDBE_ATTR_UNSPEC, + __MDBE_ATTR_MAX, +}; +#define MDBE_ATTR_MAX (__MDBE_ATTR_MAX - 1) + /* Embedded inside LINK_XSTATS_TYPE_BRIDGE */ enum { BRIDGE_XSTATS_UNSPEC, diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index a1ff0a37218589..907df6d695ec1b 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -670,9 +670,12 @@ static bool is_valid_mdb_entry(struct br_mdb_entry *entry, return true; } +static const struct nla_policy br_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = { +}; + static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, struct net_device **pdev, struct br_mdb_entry **pentry, - struct netlink_ext_ack *extack) + struct nlattr **mdb_attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct br_mdb_entry *entry; @@ -719,6 +722,17 @@ static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, return -EINVAL; *pentry = entry; + if (tb[MDBA_SET_ENTRY_ATTRS]) { + err = nla_parse_nested(mdb_attrs, MDBE_ATTR_MAX, + tb[MDBA_SET_ENTRY_ATTRS], + br_mdbe_attrs_pol, extack); + if (err) + return err; + } else { + memset(mdb_attrs, 0, + sizeof(struct nlattr *) * (MDBE_ATTR_MAX + 1)); + } + return 0; } @@ -803,6 +817,7 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br, static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { + struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1]; struct net *net = sock_net(skb->sk); struct net_bridge_vlan_group *vg; struct net_bridge_port *p = NULL; @@ -812,7 +827,7 @@ static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, struct net_bridge *br; int err; - err = br_mdb_parse(skb, nlh, &dev, &entry, extack); + err = br_mdb_parse(skb, nlh, &dev, &entry, mdb_attrs, extack); if (err < 0) return err; @@ -921,6 +936,7 @@ unlock: static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { + struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1]; struct net *net = sock_net(skb->sk); struct net_bridge_vlan_group *vg; struct net_bridge_port *p = NULL; @@ -930,7 +946,7 @@ static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, struct net_bridge *br; int err; - err = br_mdb_parse(skb, nlh, &dev, &entry, extack); + err = br_mdb_parse(skb, nlh, &dev, &entry, mdb_attrs, extack); if (err < 0) return err; |