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Merge remote-tracking branch 'mike/add-netlink-functions' into implement_create_veth

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Conflicts:
	pkg/netlink/netlink_linux.go

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
This commit is contained in:
Guillaume J. Charmes 2014-02-12 04:12:11 -08:00
commit 19445d3dfc
1 changed files with 61 additions and 4 deletions
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65
netlink/netlink_linux.go
View file

@ -15,7 +15,8 @@ const (
DEFAULT_CHANGE = 0xFFFFFFFF
IFLA_INFO_KIND = 1
IFLA_INFO_DATA = 2
VETH_PEER = 1
VETH_INFO_PEER = 1
IFLA_NET_NS_FD = 28
)
var nextSeqNr int
@ -397,6 +398,28 @@ func NetworkLinkUp(iface *net.Interface) error {
return s.HandleAck(wb.Seq)
}
func NetworkLinkDown(iface *net.Interface) error {
s, err := getNetlinkSocket()
if err != nil {
return err
}
defer s.Close()
wb := newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
msg := newIfInfomsg(syscall.AF_UNSPEC)
msg.Change = syscall.IFF_UP
msg.Flags = 0 & ^syscall.IFF_UP
msg.Index = int32(iface.Index)
wb.AddData(msg)
if err := s.Send(wb); err != nil {
return err
}
return s.HandleAck(wb.Seq)
}
func NetworkSetMTU(iface *net.Interface, mtu int) error {
s, err := getNetlinkSocket()
if err != nil {
@ -493,6 +516,38 @@ func NetworkSetNsPid(iface *net.Interface, nspid int) error {
return s.HandleAck(wb.Seq)
}
func NetworkSetNsFd(iface *net.Interface, fd int) error {
s, err := getNetlinkSocket()
if err != nil {
return err
}
defer s.Close()
wb := newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := newIfInfomsg(syscall.AF_UNSPEC)
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(iface.Index)
msg.Change = DEFAULT_CHANGE
wb.AddData(msg)
var (
b = make([]byte, 4)
native = nativeEndian()
)
native.PutUint32(b, uint32(fd))
data := newRtAttr(IFLA_NET_NS_FD, b)
wb.AddData(data)
if err := s.Send(wb); err != nil {
return err
}
return s.HandleAck(wb.Seq)
}
// Add an Ip address to an interface. This is identical to:
// ip addr add $ip/$ipNet dev $iface
func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
@ -695,7 +750,7 @@ func getIfSocket() (fd int, err error) {
return -1, err
}
func NetworkChangeName(oldName, newName string) error {
func NetworkChangeName(iface *net.Interface, newName string) error {
fd, err := getIfSocket()
if err != nil {
return err
@ -703,7 +758,9 @@ func NetworkChangeName(oldName, newName string) error {
defer syscall.Close(fd)
data := [IFNAMSIZ * 2]byte{}
copy(data[:IFNAMSIZ-1], oldName)
// the "-1"s here are very important for ensuring we get proper null
// termination of our new C strings
copy(data[:IFNAMSIZ-1], iface.Name)
copy(data[IFNAMSIZ:IFNAMSIZ*2-1], newName)
if _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.SIOCSIFNAME, uintptr(unsafe.Pointer(&data[0]))); errno != 0 {
@ -730,7 +787,7 @@ func NetworkCreateVethPair(name1, name2 string) error {
nest1 := newRtAttr(syscall.IFLA_LINKINFO, nil)
newRtAttrChild(nest1, IFLA_INFO_KIND, zeroTerminated("veth"))
nest2 := newRtAttrChild(nest1, IFLA_INFO_DATA, nil)
nest3 := newRtAttrChild(nest2, VETH_PEER, nil)
nest3 := newRtAttrChild(nest2, VETH_INFO_PEER, nil)
last := newRtAttrChild(nest3, syscall.IFLA_IFNAME, zeroTerminated(name2))
last.prefix = syscall.SizeofIfInfomsg