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Message-Id: <1355938248-8407-13-git-send-email-vyasevic@redhat.com>
Date: Wed, 19 Dec 2012 12:30:47 -0500
From: Vlad Yasevich <vyasevic@...hat.com>
To: netdev@...r.kernel.org
Cc: shemminger@...tta.com, davem@...emloft.net, or.gerlitz@...il.com,
jhs@...atatu.com, mst@...hat.com, erdnetdev@...il.com,
jiri@...nulli.us
Subject: [PATCH net-next V3 12/13] bridge: Dump vlan information from a bridge port
Using the RTM_GETLINK dump the vlan filter list of a given
bridge port. The information depends on setting the filter
flag similar to how nic VF info is dumped.
Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +-
include/linux/netdevice.h | 3 +-
include/uapi/linux/if_bridge.h | 1 +
include/uapi/linux/rtnetlink.h | 1 +
net/bridge/br_if.c | 2 +
net/bridge/br_netlink.c | 69 ++++++++++++++++++++++--
net/bridge/br_private.h | 3 +-
net/core/rtnetlink.c | 16 ++++--
8 files changed, 85 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ec97efe..2f2a8e0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7062,7 +7062,8 @@ static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
}
static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev)
+ struct net_device *dev,
+ u32 filter_mask)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
u16 mode;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 3ee7a80..d93c47c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1008,7 +1008,8 @@ struct net_device_ops {
struct nlmsghdr *nlh);
int (*ndo_bridge_getlink)(struct sk_buff *skb,
u32 pid, u32 seq,
- struct net_device *dev);
+ struct net_device *dev,
+ u32 filter_mask);
};
/*
diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 988d858..6b63e3b 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -115,6 +115,7 @@ enum {
IFLA_BRIDGE_FLAGS,
IFLA_BRIDGE_MODE,
IFLA_BRIDGE_VLAN_INFO,
+ IFLA_BRIDGE_VLAN,
__IFLA_BRIDGE_MAX,
};
#define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 354a1e7..f20654a 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -624,6 +624,7 @@ struct tcamsg {
/* New extended info filters for IFLA_EXT_MASK */
#define RTEXT_FILTER_VF (1 << 0)
+#define RTEXT_FILTER_BRVLAN (1 << 1)
/* End of information exported to user level */
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 210ce3a..8f27da7 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -373,6 +373,7 @@ int nbp_vlan_add(struct net_bridge_port *p, u16 vid, u16 flags)
set_bit(p->port_no, vlan->port_bitmap);
list_add_tail_rcu(&pve->list, &p->vlan_list);
+ p->num_vlans++;
if (flags & BRIDGE_VLAN_INFO_UNTAGGED) {
err = nbp_vlan_add_untagged(p, vlan, flags);
@@ -420,6 +421,7 @@ int nbp_vlan_delete(struct net_bridge_port *p, u16 vid, u16 flags)
br_vlan_put(vlan);
list_del_rcu(&pve->list);
+ p->num_vlans--;
kfree_rcu(pve, rcu);
br_vlan_del(p->br, vlan, flags);
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 7208899..103c6c7 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -65,8 +65,10 @@ static int br_port_fill_attrs(struct sk_buff *skb,
* Create one netlink message for one interface
* Contains port and master info as well as carrier and bridge state.
*/
-static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *port,
- u32 pid, u32 seq, int event, unsigned int flags)
+static int br_fill_ifinfo(struct sk_buff *skb,
+ const struct net_bridge_port *port,
+ u32 pid, u32 seq, int event, unsigned int flags,
+ u32 filter_mask)
{
const struct net_bridge *br = port->br;
const struct net_device *dev = port->dev;
@@ -108,6 +110,27 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por
nla_nest_end(skb, nest);
}
+ /* Check if the VID information is requested */
+ if (filter_mask & RTEXT_FILTER_BRVLAN) {
+ struct nlattr *af;
+ struct net_port_vlan *pve;
+
+ if (list_empty(&port->vlan_list))
+ goto done;
+
+ af = nla_nest_start(skb, IFLA_AF_SPEC | NLA_F_NESTED);
+ if (!af)
+ goto nla_put_failure;
+
+ list_for_each_entry_rcu(pve, &port->vlan_list, list) {
+ if (nla_put_u16(skb, IFLA_BRIDGE_VLAN, pve->vid))
+ goto nla_put_failure;
+ }
+
+ nla_nest_end(skb, af);
+ }
+
+done:
return nlmsg_end(skb, nlh);
nla_put_failure:
@@ -135,7 +158,7 @@ void br_ifinfo_notify(int event, struct net_bridge_port *port)
if (skb == NULL)
goto errout;
- err = br_fill_ifinfo(skb, port, 0, 0, event, 0);
+ err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0);
if (err < 0) {
/* -EMSGSIZE implies BUG in br_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@@ -153,7 +176,7 @@ errout:
* Dump information about all ports, in response to GETLINK
*/
int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev)
+ struct net_device *dev, u32 filter_mask)
{
int err = 0;
struct net_bridge_port *port = br_port_get_rcu(dev);
@@ -162,7 +185,8 @@ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
if (!port)
goto out;
- err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI);
+ err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
+ filter_mask);
out:
return err;
}
@@ -362,6 +386,23 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
return 0;
}
+static size_t br_get_link_af_size(const struct net_device *dev)
+{
+ struct net_bridge_port *p;
+
+ p = br_port_get_rcu(dev);
+ if (!p)
+ return 0;
+
+ /* Each VLAN is returned as a short in IFLA_BRIDGE_VLAN attr */
+ return p->num_vlans * nla_total_size(2);
+}
+
+struct rtnl_af_ops br_af_ops = {
+ .family = AF_BRIDGE,
+ .get_link_af_size = br_get_link_af_size,
+};
+
struct rtnl_link_ops br_link_ops __read_mostly = {
.kind = "bridge",
.priv_size = sizeof(struct net_bridge),
@@ -372,11 +413,27 @@ struct rtnl_link_ops br_link_ops __read_mostly = {
int __init br_netlink_init(void)
{
- return rtnl_link_register(&br_link_ops);
+ int err;
+
+ err = rtnl_af_register(&br_af_ops);
+ if (err < 0)
+ goto err2;
+
+ err = rtnl_link_register(&br_link_ops);
+ if (err < 0)
+ goto err1;
+
+ return 0;
+
+err2:
+ rtnl_af_unregister(&br_af_ops);
+err1:
+ return err;
}
void __exit br_netlink_fini(void)
{
+ rtnl_af_unregister(&br_af_ops);
rtnl_link_unregister(&br_link_ops);
rtnl_unregister_all(PF_BRIDGE);
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 6f662a4..00e07c8 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -178,6 +178,7 @@ struct net_bridge_port
#ifdef CONFIG_NET_POLL_CONTROLLER
struct netpoll *np;
#endif
+ u16 num_vlans;
struct list_head vlan_list;
struct net_bridge_vlan __rcu *untagged;
};
@@ -618,7 +619,7 @@ extern void br_netlink_fini(void);
extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev);
+ struct net_device *dev, u32 filter_mask);
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 8352302..208965f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2326,6 +2326,13 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
int idx = 0;
u32 portid = NETLINK_CB(cb->skb).portid;
u32 seq = cb->nlh->nlmsg_seq;
+ struct nlattr *extfilt;
+ u32 filter_mask = 0;
+
+ extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg),
+ IFLA_EXT_MASK);
+ if (extfilt)
+ filter_mask = nla_get_u32(extfilt);
rcu_read_lock();
for_each_netdev_rcu(net, dev) {
@@ -2335,14 +2342,15 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
if (master && master->netdev_ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
master->netdev_ops->ndo_bridge_getlink(
- skb, portid, seq, dev) < 0)
+ skb, portid, seq, dev, filter_mask) < 0)
break;
idx++;
}
if (ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
- ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
+ ops->ndo_bridge_getlink(skb, portid, seq, dev,
+ filter_mask) < 0)
break;
idx++;
}
@@ -2383,14 +2391,14 @@ static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
master && master->netdev_ops->ndo_bridge_getlink) {
- err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
+ err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
if (err < 0)
goto errout;
}
if ((flags & BRIDGE_FLAGS_SELF) &&
dev->netdev_ops->ndo_bridge_getlink) {
- err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
+ err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
if (err < 0)
goto errout;
}
--
1.7.7.6
--
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