61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package uevent provides a NETLINK_KOBJECT_UEVENT socket protocol.
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//
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// NETLINK_KOBJECT_UEVENT sockets send udev-style device events. gVisor does
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// not support any device events, so these sockets never send any messages.
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package uevent
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import (
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/sentry/context"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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"gvisor.dev/gvisor/pkg/sentry/socket/netlink"
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"gvisor.dev/gvisor/pkg/syserr"
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)
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// Protocol implements netlink.Protocol.
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//
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// +stateify savable
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type Protocol struct{}
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var _ netlink.Protocol = (*Protocol)(nil)
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// NewProtocol creates a NETLINK_KOBJECT_UEVENT netlink.Protocol.
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func NewProtocol(t *kernel.Task) (netlink.Protocol, *syserr.Error) {
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return &Protocol{}, nil
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}
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// Protocol implements netlink.Protocol.Protocol.
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func (p *Protocol) Protocol() int {
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return linux.NETLINK_KOBJECT_UEVENT
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}
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// CanSend implements netlink.Protocol.CanSend.
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func (p *Protocol) CanSend() bool {
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return false
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}
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// ProcessMessage implements netlink.Protocol.ProcessMessage.
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func (p *Protocol) ProcessMessage(ctx context.Context, hdr linux.NetlinkMessageHeader, data []byte, ms *netlink.MessageSet) *syserr.Error {
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// Silently ignore all messages.
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return nil
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}
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// init registers the NETLINK_KOBJECT_UEVENT provider.
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func init() {
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netlink.RegisterProvider(linux.NETLINK_KOBJECT_UEVENT, NewProtocol)
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}
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