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| author | Patrick McHardy <kaber@trash.net> | 2010-02-26 09:34:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-27 13:43:40 +0300 |
| commit | 3729d5021257b283f7fce33d957893162ccb2c9d (patch) | |
| tree | d44d5333dfb0cf11cfec8b05a8c7697b5c8d4c07 /drivers/net/veth.c | |
| parent | bd38081160bb3d036db98472e537b6a7dd4da51a (diff) | |
| download | linux-3729d5021257b283f7fce33d957893162ccb2c9d.tar.xz | |
rtnetlink: support specifying device flags on device creation
commit e8469ed959c373c2ff9e6f488aa5a14971aebe1f
Author: Patrick McHardy <kaber@trash.net>
Date: Tue Feb 23 20:41:30 2010 +0100
Support specifying the initial device flags when creating a device though
rtnl_link. Devices allocated by rtnl_create_link() are marked as INITIALIZING
in order to surpress netlink registration notifications. To complete setup,
rtnl_configure_link() must be called, which performs the device flag changes
and invokes the deferred notifiers if everything went well.
Two examples:
# add macvlan to eth0
#
$ ip link add link eth0 up allmulticast on type macvlan
[LINK]11: macvlan0@eth0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether 26:f8:84:02:f9:2a brd ff:ff:ff:ff:ff:ff
[ROUTE]ff00::/8 dev macvlan0 table local metric 256 mtu 1500 advmss 1440 hoplimit 0
[ROUTE]fe80::/64 dev macvlan0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 0
[LINK]11: macvlan0@eth0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500
link/ether 26:f8:84:02:f9:2a
[ADDR]11: macvlan0 inet6 fe80::24f8:84ff:fe02:f92a/64 scope link
valid_lft forever preferred_lft forever
[ROUTE]local fe80::24f8:84ff:fe02:f92a via :: dev lo table local proto none metric 0 mtu 16436 advmss 16376 hoplimit 0
[ROUTE]default via fe80::215:e9ff:fef0:10f8 dev macvlan0 proto kernel metric 1024 mtu 1500 advmss 1440 hoplimit 0
[NEIGH]fe80::215:e9ff:fef0:10f8 dev macvlan0 lladdr 00:15:e9:f0:10:f8 router STALE
[ROUTE]2001:6f8:974::/64 dev macvlan0 proto kernel metric 256 expires 0sec mtu 1500 advmss 1440 hoplimit 0
[PREFIX]prefix 2001:6f8:974::/64 dev macvlan0 onlink autoconf valid 14400 preferred 131084
[ADDR]11: macvlan0 inet6 2001:6f8:974:0:24f8:84ff:fe02:f92a/64 scope global dynamic
valid_lft 86399sec preferred_lft 14399sec
# add VLAN to eth1, eth1 is down
#
$ ip link add link eth1 up type vlan id 1000
RTNETLINK answers: Network is down
<no events>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/veth.c')
| -rw-r--r-- | drivers/net/veth.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 35609e64f6fd..b583d4968add 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -333,19 +333,17 @@ static int veth_newlink(struct net *src_net, struct net_device *dev, struct veth_priv *priv; char ifname[IFNAMSIZ]; struct nlattr *peer_tb[IFLA_MAX + 1], **tbp; + struct ifinfomsg *ifmp; struct net *net; /* * create and register peer first - * - * struct ifinfomsg is at the head of VETH_INFO_PEER, but we - * skip it since no info from it is useful yet */ - if (data != NULL && data[VETH_INFO_PEER] != NULL) { struct nlattr *nla_peer; nla_peer = data[VETH_INFO_PEER]; + ifmp = nla_data(nla_peer); err = nla_parse(peer_tb, IFLA_MAX, nla_data(nla_peer) + sizeof(struct ifinfomsg), nla_len(nla_peer) - sizeof(struct ifinfomsg), @@ -358,8 +356,10 @@ static int veth_newlink(struct net *src_net, struct net_device *dev, return err; tbp = peer_tb; - } else + } else { + ifmp = NULL; tbp = tb; + } if (tbp[IFLA_IFNAME]) nla_strlcpy(ifname, tbp[IFLA_IFNAME], IFNAMSIZ); @@ -387,6 +387,10 @@ static int veth_newlink(struct net *src_net, struct net_device *dev, netif_carrier_off(peer); + err = rtnl_configure_link(peer, ifmp); + if (err < 0) + goto err_configure_peer; + /* * register dev last * @@ -428,6 +432,7 @@ static int veth_newlink(struct net *src_net, struct net_device *dev, err_register_dev: /* nothing to do */ err_alloc_name: +err_configure_peer: unregister_netdevice(peer); return err; |