diff options
| author | Michael Pratt <mpratt@google.com> | 2019-11-04 10:06:00 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-11-04 10:07:52 -0800 |
| commit | b23b36e701c40827065217f4652a51eebc5f9913 (patch) | |
| tree | 136ce7a322c60c2b29480c0b6bd0c3d1a8065ac1 /pkg/sentry/socket/netlink/provider.go | |
| parent | 3b4f5445d03f7d2f170d68a8a4969b8acbad773e (diff) | |
Add NETLINK_KOBJECT_UEVENT socket support
NETLINK_KOBJECT_UEVENT sockets send udev-style messages for device events.
gVisor doesn't have any device events, so our sockets don't need to do anything
once created.
systemd's device manager needs to be able to create one of these sockets. It
also wants to install a BPF filter on the socket. Since we'll never send any
messages, the filter would never be invoked, thus we just fake it out.
Fixes #1117
Updates #1119
PiperOrigin-RevId: 278405893
Diffstat (limited to 'pkg/sentry/socket/netlink/provider.go')
| -rw-r--r-- | pkg/sentry/socket/netlink/provider.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/sentry/socket/netlink/provider.go b/pkg/sentry/socket/netlink/provider.go index 689cad997..be005df24 100644 --- a/pkg/sentry/socket/netlink/provider.go +++ b/pkg/sentry/socket/netlink/provider.go @@ -30,6 +30,13 @@ type Protocol interface { // Protocol returns the Linux netlink protocol value. Protocol() int + // CanSend returns true if this protocol may ever send messages. + // + // TODO(gvisor.dev/issue/1119): This is a workaround to allow + // advertising support for otherwise unimplemented features on sockets + // that will never send messages, thus making those features no-ops. + CanSend() bool + // ProcessMessage processes a single message from userspace. // // If err == nil, any messages added to ms will be sent back to the |