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Date: Thu, 27 Aug 2015 15:32:26 +0900
From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To: "David S . Miller" <davem@...emloft.net>,
Stephen Hemminger <stephen@...workplumber.org>
Cc: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>,
bridge@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [PATCH v2 net-next] bridge: Add netlink support for vlan_protocol attribute
This enables bridge vlan_protocol to be configured through netlink.
When CONFIG_BRIDGE_VLAN_FILTERING is disabled, kernel behaves the
same way as this feature is not implemented.
Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
---
v2: Fix u16 to __be16
include/uapi/linux/if_link.h | 1 +
net/bridge/br_netlink.c | 34 ++++++++++++++++++++++++++++++++++
net/bridge/br_private.h | 1 +
net/bridge/br_vlan.c | 35 +++++++++++++++++++++--------------
4 files changed, 57 insertions(+), 14 deletions(-)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 313c305..2d13dd4 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -231,6 +231,7 @@ enum {
IFLA_BR_STP_STATE,
IFLA_BR_PRIORITY,
IFLA_BR_VLAN_FILTERING,
+ IFLA_BR_VLAN_PROTOCOL,
__IFLA_BR_MAX,
};
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index dbcb194..9cea3cf 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -673,6 +673,21 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
return -EADDRNOTAVAIL;
}
+ if (!data)
+ return 0;
+
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ if (data[IFLA_BR_VLAN_PROTOCOL]) {
+ switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
+ case htons(ETH_P_8021Q):
+ case htons(ETH_P_8021AD):
+ break;
+ default:
+ return -EPROTONOSUPPORT;
+ }
+ }
+#endif
+
return 0;
}
@@ -729,6 +744,7 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
+ [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
};
static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@@ -784,6 +800,16 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
return err;
}
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ if (data[IFLA_BR_VLAN_PROTOCOL]) {
+ __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
+
+ err = __br_vlan_set_proto(br, vlan_proto);
+ if (err)
+ return err;
+ }
+#endif
+
return 0;
}
@@ -796,6 +822,9 @@ static size_t br_get_size(const struct net_device *brdev)
nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
+#endif
0;
}
@@ -819,6 +848,11 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled))
return -EMSGSIZE;
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto))
+ return -EMSGSIZE;
+#endif
+
return 0;
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3d95647..19e8f79 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -616,6 +616,7 @@ bool br_vlan_find(struct net_bridge *br, u16 vid);
void br_recalculate_fwd_mask(struct net_bridge *br);
int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
+int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
int br_vlan_init(struct net_bridge *br);
int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 3cef689..3cd8cc9 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -492,23 +492,16 @@ int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
return 0;
}
-int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
+int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
{
int err = 0;
struct net_bridge_port *p;
struct net_port_vlans *pv;
- __be16 proto, oldproto;
+ __be16 oldproto;
u16 vid, errvid;
- if (val != ETH_P_8021Q && val != ETH_P_8021AD)
- return -EPROTONOSUPPORT;
-
- if (!rtnl_trylock())
- return restart_syscall();
-
- proto = htons(val);
if (br->vlan_proto == proto)
- goto unlock;
+ return 0;
/* Add VLANs for the new proto to the device filter. */
list_for_each_entry(p, &br->port_list, list) {
@@ -539,9 +532,7 @@ int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
vlan_vid_del(p->dev, oldproto, vid);
}
-unlock:
- rtnl_unlock();
- return err;
+ return 0;
err_filt:
errvid = vid;
@@ -557,7 +548,23 @@ err_filt:
vlan_vid_del(p->dev, proto, vid);
}
- goto unlock;
+ return err;
+}
+
+int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
+{
+ int err;
+
+ if (val != ETH_P_8021Q && val != ETH_P_8021AD)
+ return -EPROTONOSUPPORT;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ err = __br_vlan_set_proto(br, htons(val));
+ rtnl_unlock();
+
+ return err;
}
static bool vlan_default_pvid(struct net_port_vlans *pv, u16 vid)
--
1.8.1.2
--
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