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bridge: Dump vlan information from a bridge port

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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@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2013-02-13 12:00:13 +00:00 committed by David S. Miller
parent 407af3299e
commit 6cbdceeb1c
7 changed files with 104 additions and 18 deletions
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3
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -7079,7 +7079,8 @@ 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;

3
include/linux/netdevice.h
View File

@ -1019,7 +1019,8 @@ 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);
int (*ndo_bridge_dellink)(struct net_device *dev,
struct nlmsghdr *nlh);
int (*ndo_change_carrier)(struct net_device *dev,

1
include/uapi/linux/rtnetlink.h
View File

@ -630,6 +630,7 @@ 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 */

94
net/bridge/br_netlink.c
View File

@ -65,15 +65,21 @@ 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_device *dev)
{
const struct net_bridge *br = port->br;
const struct net_device *dev = port->dev;
const struct net_bridge *br;
struct ifinfomsg *hdr;
struct nlmsghdr *nlh;
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
if (port)
br = port->br;
else
br = netdev_priv(dev);
br_debug(br, "br_fill_info event %d port %s master %s\n",
event, dev->name, br->dev->name);
@ -99,7 +105,7 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
goto nla_put_failure;
if (event == RTM_NEWLINK) {
if (event == RTM_NEWLINK && port) {
struct nlattr *nest
= nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
@ -108,6 +114,40 @@ 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;
const struct net_port_vlans *pv;
struct bridge_vlan_info vinfo;
u16 vid;
if (port)
pv = nbp_get_vlan_info(port);
else
pv = br_get_vlan_info(br);
if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN))
goto done;
af = nla_nest_start(skb, IFLA_AF_SPEC);
if (!af)
goto nla_put_failure;
for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN);
vid < BR_VLAN_BITMAP_LEN;
vid = find_next_bit(pv->vlan_bitmap,
BR_VLAN_BITMAP_LEN, vid+1)) {
vinfo.vid = vid;
vinfo.flags = 0;
if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
sizeof(vinfo), &vinfo))
goto nla_put_failure;
}
nla_nest_end(skb, af);
}
done:
return nlmsg_end(skb, nlh);
nla_put_failure:
@ -135,7 +175,7 @@ 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, port->dev);
if (err < 0) {
/* -EMSGSIZE implies BUG in br_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@ -154,16 +194,17 @@ void br_ifinfo_notify(int event, struct net_bridge_port *port)
* 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);
/* not a bridge port */
if (!port)
/* not a bridge port and */
if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
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, dev);
out:
return err;
}
@ -395,6 +436,29 @@ 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_port_vlans *pv;
if (br_port_exists(dev))
pv = nbp_get_vlan_info(br_port_get_rcu(dev));
else if (dev->priv_flags & IFF_EBRIDGE)
pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
else
return 0;
if (!pv)
return 0;
/* Each VLAN is returned in bridge_vlan_info along with flags */
return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
}
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),
@ -408,11 +472,18 @@ int __init br_netlink_init(void)
int err;
br_mdb_init();
err = rtnl_link_register(&br_link_ops);
err = rtnl_af_register(&br_af_ops);
if (err)
goto out;
err = rtnl_link_register(&br_link_ops);
if (err)
goto out_af;
return 0;
out_af:
rtnl_af_unregister(&br_af_ops);
out:
br_mdb_uninit();
return err;
@ -421,5 +492,6 @@ int __init br_netlink_init(void)
void __exit br_netlink_fini(void)
{
br_mdb_uninit();
rtnl_af_unregister(&br_af_ops);
rtnl_link_unregister(&br_link_ops);
}

3
net/bridge/br_private.h
View File

@ -73,6 +73,7 @@ struct net_port_vlans {
} parent;
struct rcu_head rcu;
unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
u16 num_vlans;
};
struct net_bridge_fdb_entry
@ -715,7 +716,7 @@ 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_dellink(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 */

2
net/bridge/br_vlan.c
View File

@ -28,6 +28,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid)
}
set_bit(vid, v->vlan_bitmap);
v->num_vlans++;
return 0;
}
@ -44,6 +45,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid)
}
clear_bit(vid, v->vlan_bitmap);
v->num_vlans--;
if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
if (v->port_idx)
rcu_assign_pointer(v->parent.port->vlan_info, NULL);

16
net/core/rtnetlink.c
View File

@ -2315,6 +2315,13 @@ 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) {
@ -2324,14 +2331,15 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
br_dev->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++;
}
@ -2372,14 +2380,14 @@ static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
err = br_dev->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;
}