snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1
Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для неё не нужна. Module path github.com/sagernet/gvisor сохранён намеренно: на него опирается replace-директива суперпроекта. Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show и переносилась на новый пин копированием. SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH
This commit is contained in:
Leadaxe
commit
2c4ae3b0a4
712 changed files with 185689 additions and 0 deletions
321
pkg/tcpip/link/channel/channel.go
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321
pkg/tcpip/link/channel/channel.go
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// Copyright 2018 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 channel provides the implementation of channel-based data-link layer
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// endpoints. Such endpoints allow injection of inbound packets and store
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// outbound packets in a channel.
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package channel
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import (
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"context"
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"github.com/sagernet/gvisor/pkg/tcpip"
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"github.com/sagernet/gvisor/pkg/tcpip/header"
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"github.com/sagernet/gvisor/pkg/tcpip/stack"
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)
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// Notification is the interface for receiving notification from the packet
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// queue.
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type Notification interface {
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// WriteNotify will be called when a write happens to the queue.
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WriteNotify()
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}
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// NotificationHandle is an opaque handle to the registered notification target.
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// It can be used to unregister the notification when no longer interested.
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//
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// +stateify savable
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type NotificationHandle struct {
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n Notification
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}
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type queue struct {
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// c is the outbound packet channel.
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c chan *stack.PacketBuffer
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mu queueRWMutex
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// +checklocks:mu
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notify []*NotificationHandle
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// +checklocks:mu
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closed bool
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}
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func (q *queue) Close() {
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q.mu.Lock()
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defer q.mu.Unlock()
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if !q.closed {
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close(q.c)
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}
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q.closed = true
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}
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func (q *queue) Read() *stack.PacketBuffer {
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select {
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case p := <-q.c:
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return p
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default:
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return nil
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}
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}
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func (q *queue) ReadContext(ctx context.Context) *stack.PacketBuffer {
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select {
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case pkt := <-q.c:
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return pkt
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case <-ctx.Done():
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return nil
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}
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}
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func (q *queue) Write(pkt *stack.PacketBuffer) tcpip.Error {
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// q holds the PacketBuffer.
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q.mu.RLock()
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if q.closed {
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q.mu.RUnlock()
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return &tcpip.ErrClosedForSend{}
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}
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wrote := false
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p := pkt.Clone()
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select {
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case q.c <- p:
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wrote = true
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default:
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p.DecRef()
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}
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notify := q.notify
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q.mu.RUnlock()
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if wrote {
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// Send notification outside of lock.
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for _, h := range notify {
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h.n.WriteNotify()
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}
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return nil
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}
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return &tcpip.ErrNoBufferSpace{}
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}
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func (q *queue) Num() int {
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return len(q.c)
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}
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func (q *queue) AddNotify(notify Notification) *NotificationHandle {
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q.mu.Lock()
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defer q.mu.Unlock()
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h := &NotificationHandle{n: notify}
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q.notify = append(q.notify, h)
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return h
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}
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func (q *queue) RemoveNotify(handle *NotificationHandle) {
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q.mu.Lock()
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defer q.mu.Unlock()
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// Make a copy, since we reads the array outside of lock when notifying.
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notify := make([]*NotificationHandle, 0, len(q.notify))
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for _, h := range q.notify {
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if h != handle {
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notify = append(notify, h)
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}
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}
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q.notify = notify
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}
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var (
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_ stack.LinkEndpoint = (*Endpoint)(nil)
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_ stack.GSOEndpoint = (*Endpoint)(nil)
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)
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// Endpoint is link layer endpoint that stores outbound packets in a channel
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// and allows injection of inbound packets.
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//
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// +stateify savable
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type Endpoint struct {
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LinkEPCapabilities stack.LinkEndpointCapabilities
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SupportedGSOKind stack.SupportedGSO
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mu endpointRWMutex `state:"nosave"`
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// +checklocks:mu
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dispatcher stack.NetworkDispatcher
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// +checklocks:mu
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linkAddr tcpip.LinkAddress
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// +checklocks:mu
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mtu uint32
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// Outbound packet queue.
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q *queue
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}
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// New creates a new channel endpoint.
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func New(size int, mtu uint32, linkAddr tcpip.LinkAddress) *Endpoint {
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return &Endpoint{
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q: &queue{
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c: make(chan *stack.PacketBuffer, size),
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},
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mtu: mtu,
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linkAddr: linkAddr,
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}
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}
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// Close closes e. Further packet injections will return an error, and all pending
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// packets are discarded. Close may be called concurrently with WritePackets.
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func (e *Endpoint) Close() {
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e.q.Close()
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e.Drain()
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}
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// Read does non-blocking read one packet from the outbound packet queue.
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func (e *Endpoint) Read() *stack.PacketBuffer {
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return e.q.Read()
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}
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// ReadContext does blocking read for one packet from the outbound packet queue.
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// It can be cancelled by ctx, and in this case, it returns nil.
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func (e *Endpoint) ReadContext(ctx context.Context) *stack.PacketBuffer {
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return e.q.ReadContext(ctx)
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}
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// Drain removes all outbound packets from the channel and counts them.
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func (e *Endpoint) Drain() int {
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c := 0
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for pkt := e.Read(); pkt != nil; pkt = e.Read() {
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pkt.DecRef()
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c++
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}
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return c
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}
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// NumQueued returns the number of packet queued for outbound.
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func (e *Endpoint) NumQueued() int {
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return e.q.Num()
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}
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// InjectInbound injects an inbound packet. If the endpoint is not attached, the
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// packet is not delivered.
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func (e *Endpoint) InjectInbound(protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
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e.mu.RLock()
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d := e.dispatcher
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e.mu.RUnlock()
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if d != nil {
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d.DeliverNetworkPacket(protocol, pkt)
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}
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}
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// Attach saves the stack network-layer dispatcher for use later when packets
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// are injected.
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func (e *Endpoint) Attach(dispatcher stack.NetworkDispatcher) {
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e.mu.Lock()
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defer e.mu.Unlock()
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e.dispatcher = dispatcher
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}
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// IsAttached implements stack.LinkEndpoint.IsAttached.
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func (e *Endpoint) IsAttached() bool {
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e.mu.RLock()
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defer e.mu.RUnlock()
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return e.dispatcher != nil
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}
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// MTU implements stack.LinkEndpoint.MTU.
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func (e *Endpoint) MTU() uint32 {
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e.mu.RLock()
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defer e.mu.RUnlock()
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return e.mtu
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}
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// SetMTU implements stack.LinkEndpoint.SetMTU.
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func (e *Endpoint) SetMTU(mtu uint32) {
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e.mu.Lock()
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defer e.mu.Unlock()
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e.mtu = mtu
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}
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// Capabilities implements stack.LinkEndpoint.Capabilities.
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func (e *Endpoint) Capabilities() stack.LinkEndpointCapabilities {
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return e.LinkEPCapabilities
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}
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// GSOMaxSize implements stack.GSOEndpoint.
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func (*Endpoint) GSOMaxSize() uint32 {
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return 1 << 15
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}
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// SupportedGSO implements stack.GSOEndpoint.
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func (e *Endpoint) SupportedGSO() stack.SupportedGSO {
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return e.SupportedGSOKind
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}
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// MaxHeaderLength returns the maximum size of the link layer header. Given it
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// doesn't have a header, it just returns 0.
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func (*Endpoint) MaxHeaderLength() uint16 {
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return 0
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}
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// LinkAddress returns the link address of this endpoint.
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func (e *Endpoint) LinkAddress() tcpip.LinkAddress {
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e.mu.RLock()
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defer e.mu.RUnlock()
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return e.linkAddr
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}
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// SetLinkAddress implements stack.LinkEndpoint.SetLinkAddress.
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func (e *Endpoint) SetLinkAddress(addr tcpip.LinkAddress) {
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e.mu.Lock()
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defer e.mu.Unlock()
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e.linkAddr = addr
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}
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// WritePackets stores outbound packets into the channel.
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// Multiple concurrent calls are permitted.
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func (e *Endpoint) WritePackets(pkts stack.PacketBufferList) (int, tcpip.Error) {
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n := 0
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for _, pkt := range pkts.AsSlice() {
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if err := e.q.Write(pkt); err != nil {
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if _, ok := err.(*tcpip.ErrNoBufferSpace); !ok && n == 0 {
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return 0, err
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}
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break
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}
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n++
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}
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return n, nil
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}
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// Wait implements stack.LinkEndpoint.Wait.
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func (*Endpoint) Wait() {}
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// AddNotify adds a notification target for receiving event about outgoing
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// packets.
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func (e *Endpoint) AddNotify(notify Notification) *NotificationHandle {
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return e.q.AddNotify(notify)
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}
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// RemoveNotify removes handle from the list of notification targets.
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func (e *Endpoint) RemoveNotify(handle *NotificationHandle) {
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e.q.RemoveNotify(handle)
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}
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// ARPHardwareType implements stack.LinkEndpoint.ARPHardwareType.
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func (*Endpoint) ARPHardwareType() header.ARPHardwareType {
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return header.ARPHardwareNone
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}
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// AddHeader implements stack.LinkEndpoint.AddHeader.
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func (*Endpoint) AddHeader(*stack.PacketBuffer) {}
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// ParseHeader implements stack.LinkEndpoint.ParseHeader.
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func (*Endpoint) ParseHeader(*stack.PacketBuffer) bool { return true }
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// SetOnCloseAction implements stack.LinkEndpoint.
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func (*Endpoint) SetOnCloseAction(func()) {}
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79
pkg/tcpip/link/channel/channel_state_autogen.go
Normal file
79
pkg/tcpip/link/channel/channel_state_autogen.go
Normal file
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// automatically generated by stateify.
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package channel
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import (
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"context"
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"github.com/sagernet/gvisor/pkg/state"
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)
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func (n *NotificationHandle) StateTypeName() string {
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return "pkg/tcpip/link/channel.NotificationHandle"
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}
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func (n *NotificationHandle) StateFields() []string {
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return []string{
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"n",
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}
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}
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func (n *NotificationHandle) beforeSave() {}
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// +checklocksignore
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func (n *NotificationHandle) StateSave(stateSinkObject state.Sink) {
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n.beforeSave()
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stateSinkObject.Save(0, &n.n)
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}
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func (n *NotificationHandle) afterLoad(context.Context) {}
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// +checklocksignore
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func (n *NotificationHandle) StateLoad(ctx context.Context, stateSourceObject state.Source) {
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stateSourceObject.Load(0, &n.n)
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}
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func (e *Endpoint) StateTypeName() string {
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return "pkg/tcpip/link/channel.Endpoint"
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}
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func (e *Endpoint) StateFields() []string {
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return []string{
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"LinkEPCapabilities",
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"SupportedGSOKind",
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"dispatcher",
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"linkAddr",
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"mtu",
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"q",
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}
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}
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func (e *Endpoint) beforeSave() {}
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// +checklocksignore
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func (e *Endpoint) StateSave(stateSinkObject state.Sink) {
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e.beforeSave()
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stateSinkObject.Save(0, &e.LinkEPCapabilities)
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stateSinkObject.Save(1, &e.SupportedGSOKind)
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stateSinkObject.Save(2, &e.dispatcher)
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stateSinkObject.Save(3, &e.linkAddr)
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stateSinkObject.Save(4, &e.mtu)
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stateSinkObject.Save(5, &e.q)
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}
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func (e *Endpoint) afterLoad(context.Context) {}
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// +checklocksignore
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func (e *Endpoint) StateLoad(ctx context.Context, stateSourceObject state.Source) {
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stateSourceObject.Load(0, &e.LinkEPCapabilities)
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stateSourceObject.Load(1, &e.SupportedGSOKind)
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stateSourceObject.Load(2, &e.dispatcher)
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stateSourceObject.Load(3, &e.linkAddr)
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stateSourceObject.Load(4, &e.mtu)
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stateSourceObject.Load(5, &e.q)
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}
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func init() {
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state.Register((*NotificationHandle)(nil))
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state.Register((*Endpoint)(nil))
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}
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96
pkg/tcpip/link/channel/endpoint_mutex.go
Normal file
96
pkg/tcpip/link/channel/endpoint_mutex.go
Normal file
|
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@ -0,0 +1,96 @@
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package channel
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import (
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"reflect"
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"github.com/sagernet/gvisor/pkg/sync"
|
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"github.com/sagernet/gvisor/pkg/sync/locking"
|
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)
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// RWMutex is sync.RWMutex with the correctness validator.
|
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type endpointRWMutex struct {
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mu sync.RWMutex
|
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}
|
||||
|
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// lockNames is a list of user-friendly lock names.
|
||||
// Populated in init.
|
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var endpointlockNames []string
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|
||||
// lockNameIndex is used as an index passed to NestedLock and NestedUnlock,
|
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// referring to an index within lockNames.
|
||||
// Values are specified using the "consts" field of go_template_instance.
|
||||
type endpointlockNameIndex int
|
||||
|
||||
// DO NOT REMOVE: The following function automatically replaced with lock index constants.
|
||||
// LOCK_NAME_INDEX_CONSTANTS
|
||||
const ()
|
||||
|
||||
// Lock locks m.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) Lock() {
|
||||
locking.AddGLock(endpointprefixIndex, -1)
|
||||
m.mu.Lock()
|
||||
}
|
||||
|
||||
// NestedLock locks m knowing that another lock of the same type is held.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) NestedLock(i endpointlockNameIndex) {
|
||||
locking.AddGLock(endpointprefixIndex, int(i))
|
||||
m.mu.Lock()
|
||||
}
|
||||
|
||||
// Unlock unlocks m.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) Unlock() {
|
||||
m.mu.Unlock()
|
||||
locking.DelGLock(endpointprefixIndex, -1)
|
||||
}
|
||||
|
||||
// NestedUnlock unlocks m knowing that another lock of the same type is held.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) NestedUnlock(i endpointlockNameIndex) {
|
||||
m.mu.Unlock()
|
||||
locking.DelGLock(endpointprefixIndex, int(i))
|
||||
}
|
||||
|
||||
// RLock locks m for reading.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) RLock() {
|
||||
locking.AddGLock(endpointprefixIndex, -1)
|
||||
m.mu.RLock()
|
||||
}
|
||||
|
||||
// RUnlock undoes a single RLock call.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) RUnlock() {
|
||||
m.mu.RUnlock()
|
||||
locking.DelGLock(endpointprefixIndex, -1)
|
||||
}
|
||||
|
||||
// RLockBypass locks m for reading without executing the validator.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) RLockBypass() {
|
||||
m.mu.RLock()
|
||||
}
|
||||
|
||||
// RUnlockBypass undoes a single RLockBypass call.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) RUnlockBypass() {
|
||||
m.mu.RUnlock()
|
||||
}
|
||||
|
||||
// DowngradeLock atomically unlocks rw for writing and locks it for reading.
|
||||
// +checklocksignore
|
||||
func (m *endpointRWMutex) DowngradeLock() {
|
||||
m.mu.DowngradeLock()
|
||||
}
|
||||
|
||||
var endpointprefixIndex *locking.MutexClass
|
||||
|
||||
// DO NOT REMOVE: The following function is automatically replaced.
|
||||
func endpointinitLockNames() {}
|
||||
|
||||
func init() {
|
||||
endpointinitLockNames()
|
||||
endpointprefixIndex = locking.NewMutexClass(reflect.TypeOf(endpointRWMutex{}), endpointlockNames)
|
||||
}
|
||||
96
pkg/tcpip/link/channel/queue_mutex.go
Normal file
96
pkg/tcpip/link/channel/queue_mutex.go
Normal file
|
|
@ -0,0 +1,96 @@
|
|||
package channel
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
|
||||
"github.com/sagernet/gvisor/pkg/sync"
|
||||
"github.com/sagernet/gvisor/pkg/sync/locking"
|
||||
)
|
||||
|
||||
// RWMutex is sync.RWMutex with the correctness validator.
|
||||
type queueRWMutex struct {
|
||||
mu sync.RWMutex
|
||||
}
|
||||
|
||||
// lockNames is a list of user-friendly lock names.
|
||||
// Populated in init.
|
||||
var queuelockNames []string
|
||||
|
||||
// lockNameIndex is used as an index passed to NestedLock and NestedUnlock,
|
||||
// referring to an index within lockNames.
|
||||
// Values are specified using the "consts" field of go_template_instance.
|
||||
type queuelockNameIndex int
|
||||
|
||||
// DO NOT REMOVE: The following function automatically replaced with lock index constants.
|
||||
// LOCK_NAME_INDEX_CONSTANTS
|
||||
const ()
|
||||
|
||||
// Lock locks m.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) Lock() {
|
||||
locking.AddGLock(queueprefixIndex, -1)
|
||||
m.mu.Lock()
|
||||
}
|
||||
|
||||
// NestedLock locks m knowing that another lock of the same type is held.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) NestedLock(i queuelockNameIndex) {
|
||||
locking.AddGLock(queueprefixIndex, int(i))
|
||||
m.mu.Lock()
|
||||
}
|
||||
|
||||
// Unlock unlocks m.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) Unlock() {
|
||||
m.mu.Unlock()
|
||||
locking.DelGLock(queueprefixIndex, -1)
|
||||
}
|
||||
|
||||
// NestedUnlock unlocks m knowing that another lock of the same type is held.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) NestedUnlock(i queuelockNameIndex) {
|
||||
m.mu.Unlock()
|
||||
locking.DelGLock(queueprefixIndex, int(i))
|
||||
}
|
||||
|
||||
// RLock locks m for reading.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) RLock() {
|
||||
locking.AddGLock(queueprefixIndex, -1)
|
||||
m.mu.RLock()
|
||||
}
|
||||
|
||||
// RUnlock undoes a single RLock call.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) RUnlock() {
|
||||
m.mu.RUnlock()
|
||||
locking.DelGLock(queueprefixIndex, -1)
|
||||
}
|
||||
|
||||
// RLockBypass locks m for reading without executing the validator.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) RLockBypass() {
|
||||
m.mu.RLock()
|
||||
}
|
||||
|
||||
// RUnlockBypass undoes a single RLockBypass call.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) RUnlockBypass() {
|
||||
m.mu.RUnlock()
|
||||
}
|
||||
|
||||
// DowngradeLock atomically unlocks rw for writing and locks it for reading.
|
||||
// +checklocksignore
|
||||
func (m *queueRWMutex) DowngradeLock() {
|
||||
m.mu.DowngradeLock()
|
||||
}
|
||||
|
||||
var queueprefixIndex *locking.MutexClass
|
||||
|
||||
// DO NOT REMOVE: The following function is automatically replaced.
|
||||
func queueinitLockNames() {}
|
||||
|
||||
func init() {
|
||||
queueinitLockNames()
|
||||
queueprefixIndex = locking.NewMutexClass(reflect.TypeOf(queueRWMutex{}), queuelockNames)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue