summaryrefslogtreecommitdiffhomepage
path: root/runsc/sandbox/network.go
diff options
context:
space:
mode:
Diffstat (limited to 'runsc/sandbox/network.go')
-rw-r--r--runsc/sandbox/network.go107
1 files changed, 64 insertions, 43 deletions
diff --git a/runsc/sandbox/network.go b/runsc/sandbox/network.go
index 5634f0707..be8b72b3e 100644
--- a/runsc/sandbox/network.go
+++ b/runsc/sandbox/network.go
@@ -28,6 +28,8 @@ import (
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/log"
+ "gvisor.dev/gvisor/pkg/tcpip/header"
+ "gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/urpc"
"gvisor.dev/gvisor/runsc/boot"
"gvisor.dev/gvisor/runsc/specutils"
@@ -61,7 +63,7 @@ func setupNetwork(conn *urpc.Client, pid int, spec *specs.Spec, conf *boot.Confi
// Build the path to the net namespace of the sandbox process.
// This is what we will copy.
nsPath := filepath.Join("/proc", strconv.Itoa(pid), "ns/net")
- if err := createInterfacesAndRoutesFromNS(conn, nsPath, conf.GSO, conf.NumNetworkChannels); err != nil {
+ if err := createInterfacesAndRoutesFromNS(conn, nsPath, conf.HardwareGSO, conf.SoftwareGSO, conf.NumNetworkChannels); err != nil {
return fmt.Errorf("creating interfaces from net namespace %q: %v", nsPath, err)
}
case boot.NetworkHost:
@@ -136,7 +138,7 @@ func isRootNS() (bool, error) {
// createInterfacesAndRoutesFromNS scrapes the interface and routes from the
// net namespace with the given path, creates them in the sandbox, and removes
// them from the host.
-func createInterfacesAndRoutesFromNS(conn *urpc.Client, nsPath string, enableGSO bool, numNetworkChannels int) error {
+func createInterfacesAndRoutesFromNS(conn *urpc.Client, nsPath string, hardwareGSO bool, softwareGSO bool, numNetworkChannels int) error {
// Join the network namespace that we will be copying.
restore, err := joinNetNS(nsPath)
if err != nil {
@@ -182,36 +184,39 @@ func createInterfacesAndRoutesFromNS(conn *urpc.Client, nsPath string, enableGSO
continue
}
- // Keep only IPv4 addresses.
- var ip4addrs []*net.IPNet
+ var ipAddrs []*net.IPNet
for _, ifaddr := range allAddrs {
ipNet, ok := ifaddr.(*net.IPNet)
if !ok {
return fmt.Errorf("address is not IPNet: %+v", ifaddr)
}
- if ipNet.IP.To4() == nil {
- log.Warningf("IPv6 is not supported, skipping: %v", ipNet)
- continue
- }
- ip4addrs = append(ip4addrs, ipNet)
+ ipAddrs = append(ipAddrs, ipNet)
}
- if len(ip4addrs) == 0 {
- log.Warningf("No IPv4 address found for interface %q, skipping", iface.Name)
+ if len(ipAddrs) == 0 {
+ log.Warningf("No usable IP addresses found for interface %q, skipping", iface.Name)
continue
}
// Scrape the routes before removing the address, since that
// will remove the routes as well.
- routes, def, err := routesForIface(iface)
+ routes, defv4, defv6, err := routesForIface(iface)
if err != nil {
return fmt.Errorf("getting routes for interface %q: %v", iface.Name, err)
}
- if def != nil {
- if !args.DefaultGateway.Route.Empty() {
- return fmt.Errorf("more than one default route found, interface: %v, route: %v, default route: %+v", iface.Name, def, args.DefaultGateway)
+ if defv4 != nil {
+ if !args.Defaultv4Gateway.Route.Empty() {
+ return fmt.Errorf("more than one default route found, interface: %v, route: %v, default route: %+v", iface.Name, defv4, args.Defaultv4Gateway)
}
- args.DefaultGateway.Route = *def
- args.DefaultGateway.Name = iface.Name
+ args.Defaultv4Gateway.Route = *defv4
+ args.Defaultv4Gateway.Name = iface.Name
+ }
+
+ if defv6 != nil {
+ if !args.Defaultv6Gateway.Route.Empty() {
+ return fmt.Errorf("more than one default route found, interface: %v, route: %v, default route: %+v", iface.Name, defv6, args.Defaultv6Gateway)
+ }
+ args.Defaultv6Gateway.Route = *defv6
+ args.Defaultv6Gateway.Name = iface.Name
}
link := boot.FDBasedLink{
@@ -232,7 +237,7 @@ func createInterfacesAndRoutesFromNS(conn *urpc.Client, nsPath string, enableGSO
// Create the socket for the device.
for i := 0; i < link.NumChannels; i++ {
log.Debugf("Creating Channel %d", i)
- socketEntry, err := createSocket(iface, ifaceLink, enableGSO)
+ socketEntry, err := createSocket(iface, ifaceLink, hardwareGSO)
if err != nil {
return fmt.Errorf("failed to createSocket for %s : %v", iface.Name, err)
}
@@ -247,9 +252,15 @@ func createInterfacesAndRoutesFromNS(conn *urpc.Client, nsPath string, enableGSO
args.FilePayload.Files = append(args.FilePayload.Files, socketEntry.deviceFile)
}
+ if link.GSOMaxSize == 0 && softwareGSO {
+ // Hardware GSO is disabled. Let's enable software GSO.
+ link.GSOMaxSize = stack.SoftwareGSOMaxSize
+ link.SoftwareGSOEnabled = true
+ }
+
// Collect the addresses for the interface, enable forwarding,
// and remove them from the host.
- for _, addr := range ip4addrs {
+ for _, addr := range ipAddrs {
link.Addresses = append(link.Addresses, addr.IP)
// Steal IP address from NIC.
@@ -345,46 +356,56 @@ func loopbackLinks(iface net.Interface, addrs []net.Addr) ([]boot.LoopbackLink,
}
// routesForIface iterates over all routes for the given interface and converts
-// them to boot.Routes.
-func routesForIface(iface net.Interface) ([]boot.Route, *boot.Route, error) {
+// them to boot.Routes. It also returns the a default v4/v6 route if found.
+func routesForIface(iface net.Interface) ([]boot.Route, *boot.Route, *boot.Route, error) {
link, err := netlink.LinkByIndex(iface.Index)
if err != nil {
- return nil, nil, err
+ return nil, nil, nil, err
}
rs, err := netlink.RouteList(link, netlink.FAMILY_ALL)
if err != nil {
- return nil, nil, fmt.Errorf("getting routes from %q: %v", iface.Name, err)
+ return nil, nil, nil, fmt.Errorf("getting routes from %q: %v", iface.Name, err)
}
- var def *boot.Route
+ var defv4, defv6 *boot.Route
var routes []boot.Route
for _, r := range rs {
// Is it a default route?
if r.Dst == nil {
if r.Gw == nil {
- return nil, nil, fmt.Errorf("default route with no gateway %q: %+v", iface.Name, r)
- }
- if r.Gw.To4() == nil {
- log.Warningf("IPv6 is not supported, skipping default route: %v", r)
- continue
- }
- if def != nil {
- return nil, nil, fmt.Errorf("more than one default route found %q, def: %+v, route: %+v", iface.Name, def, r)
+ return nil, nil, nil, fmt.Errorf("default route with no gateway %q: %+v", iface.Name, r)
}
// Create a catch all route to the gateway.
- def = &boot.Route{
- Destination: net.IPNet{
- IP: net.IPv4zero,
- Mask: net.IPMask(net.IPv4zero),
- },
- Gateway: r.Gw,
+ switch len(r.Gw) {
+ case header.IPv4AddressSize:
+ if defv4 != nil {
+ return nil, nil, nil, fmt.Errorf("more than one default route found %q, def: %+v, route: %+v", iface.Name, defv4, r)
+ }
+ defv4 = &boot.Route{
+ Destination: net.IPNet{
+ IP: net.IPv4zero,
+ Mask: net.IPMask(net.IPv4zero),
+ },
+ Gateway: r.Gw,
+ }
+ case header.IPv6AddressSize:
+ if defv6 != nil {
+ return nil, nil, nil, fmt.Errorf("more than one default route found %q, def: %+v, route: %+v", iface.Name, defv6, r)
+ }
+
+ defv6 = &boot.Route{
+ Destination: net.IPNet{
+ IP: net.IPv6zero,
+ Mask: net.IPMask(net.IPv6zero),
+ },
+ Gateway: r.Gw,
+ }
+ default:
+ return nil, nil, nil, fmt.Errorf("unexpected address size for gateway: %+v for route: %+v", r.Gw, r)
}
continue
}
- if r.Dst.IP.To4() == nil {
- log.Warningf("IPv6 is not supported, skipping route: %v", r)
- continue
- }
+
dst := *r.Dst
dst.IP = dst.IP.Mask(dst.Mask)
routes = append(routes, boot.Route{
@@ -392,7 +413,7 @@ func routesForIface(iface net.Interface) ([]boot.Route, *boot.Route, error) {
Gateway: r.Gw,
})
}
- return routes, def, nil
+ return routes, defv4, defv6, nil
}
// removeAddress removes IP address from network device. It's equivalent to:
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-23 22:43:12 +0000