mirror of
https://github.com/cubefs/cubefs.git
synced 2026-08-02 02:00:56 +00:00
259 lines
7.5 KiB
Go
259 lines
7.5 KiB
Go
// Copyright 2018 The CubeFS 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
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// implied. See the License for the specific language governing
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// permissions and limitations under the License.
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package flashnode
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import (
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"context"
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"fmt"
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"net"
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"sync"
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"time"
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"github.com/cubefs/cubefs/flashnode/cachengine"
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"github.com/cubefs/cubefs/proto"
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"github.com/cubefs/cubefs/util"
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"github.com/cubefs/cubefs/util/errors"
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"github.com/cubefs/cubefs/util/exporter"
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"github.com/cubefs/cubefs/util/log"
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)
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func (f *FlashNode) preHandle(conn net.Conn, p *proto.Packet) error {
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if p.Opcode == proto.OpCacheRead && !f.readLimiter.Allow() {
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metric := exporter.NewTPCnt("NodeReqLimit")
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metric.Set(nil)
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err := errors.NewErrorf("%s", "flashnode read request was been limited")
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log.LogWarnf("action[preHandle] %s, remote address:%s", err.Error(), conn.RemoteAddr())
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return err
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}
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return nil
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}
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func (f *FlashNode) handlePacket(conn net.Conn, p *proto.Packet) (err error) {
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metric := exporter.NewTPCnt(p.GetOpMsg())
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defer func() { metric.Set(err) }()
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switch p.Opcode {
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case proto.OpFlashNodeHeartbeat:
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err = f.opFlashNodeHeartbeat(conn, p)
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case proto.OpCacheRead:
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err = f.opCacheRead(conn, p)
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case proto.OpCachePrepare:
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err = f.opPrepare(conn, p)
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default:
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err = fmt.Errorf("unknown Opcode:%d", p.Opcode)
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}
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if err != nil {
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err = errors.NewErrorf("%s [%s] req: %d - %s", conn.RemoteAddr().String(),
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p.GetOpMsg(), p.GetReqID(), err.Error())
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}
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return
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}
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func (f *FlashNode) opFlashNodeHeartbeat(conn net.Conn, p *proto.Packet) (err error) {
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p.PacketOkReply()
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if err = p.WriteToConn(conn); err != nil {
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log.LogErrorf("ack master response: %s", err.Error())
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return err
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}
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log.LogInfof("[opMasterHeartbeat] master:%s", conn.RemoteAddr().String())
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return
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}
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func (f *FlashNode) opCacheRead(conn net.Conn, p *proto.Packet) (err error) {
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var volume string
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defer func() {
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if err != nil {
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logContent := fmt.Sprintf("action[opCacheRead] volume:[%v], logMsg:%v.", volume,
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p.LogMessage(p.GetOpMsg(), conn.RemoteAddr().String(), p.StartT, err))
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log.LogError(logContent)
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p.PacketErrorWithBody(proto.OpErr, ([]byte)(err.Error()))
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p.WriteToConn(conn)
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}
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}()
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ctx, ctxCancel := context.WithTimeout(context.Background(), proto.ReadCacheTimeout*time.Second*2)
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defer ctxCancel()
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req := new(proto.CacheReadRequest)
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if err = p.UnmarshalDataPb(req); err != nil {
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return
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}
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volume = req.CacheRequest.Volume
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cr := req.CacheRequest
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block, err := f.cacheEngine.GetCacheBlockForRead(volume, cr.Inode, cr.FixedFileOffset, cr.Version, req.Size_)
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if err != nil {
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if block, err = f.cacheEngine.CreateBlock(cr); err != nil {
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return err
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}
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go block.InitOnce(f.cacheEngine, cr.Sources)
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}
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err = f.doStreamReadRequest(ctx, conn, req, p, block)
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return
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}
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func (f *FlashNode) doStreamReadRequest(ctx context.Context, conn net.Conn, req *proto.CacheReadRequest, p *proto.Packet, block *cachengine.CacheBlock) (err error) {
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const action = "action[doStreamReadRequest]"
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needReplySize := uint32(req.Size_)
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offset := int64(req.Offset)
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defer func() {
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if err != nil {
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err = fmt.Errorf("%s cache block(%v) err:%v", action, block.String(), err)
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}
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}()
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for needReplySize > 0 {
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err = nil
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reply := proto.NewPacket()
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reply.ReqID = p.ReqID
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reply.StartT = p.StartT
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currReadSize := uint32(util.Min(int(needReplySize), util.ReadBlockSize))
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var bufOnce sync.Once
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buf, bufErr := proto.Buffers.Get(util.ReadBlockSize)
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bufRelease := func() {
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bufOnce.Do(func() {
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if bufErr == nil {
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proto.Buffers.Put(reply.Data[:util.ReadBlockSize])
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}
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})
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}
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if bufErr != nil {
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buf = make([]byte, currReadSize)
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}
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reply.Data = buf[:currReadSize]
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reply.ExtentOffset = offset
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p.Size = currReadSize
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p.ExtentOffset = offset
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reply.CRC, err = block.Read(ctx, reply.Data[:], offset, int64(currReadSize))
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if err != nil {
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bufRelease()
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return
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}
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p.CRC = reply.CRC
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reply.Size = currReadSize
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reply.ResultCode = proto.OpOk
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reply.Opcode = p.Opcode
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p.ResultCode = proto.OpOk
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if err = reply.WriteToConn(conn); err != nil {
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bufRelease()
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log.LogErrorf("%s volume:[%v] %v.", action, req.CacheRequest.Volume,
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reply.LogMessage(reply.GetOpMsg(), conn.RemoteAddr().String(), reply.StartT, err))
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return
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}
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needReplySize -= currReadSize
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offset += int64(currReadSize)
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bufRelease()
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log.LogInfof("%s ReqID[%v] volume:[%v] reply[%v] block[%v] .", action, p.ReqID, req.CacheRequest.Volume,
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reply.LogMessage(reply.GetOpMsg(), conn.RemoteAddr().String(), reply.StartT, err), block.String())
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}
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p.PacketOkReply()
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return
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}
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func (f *FlashNode) opPrepare(conn net.Conn, p *proto.Packet) (err error) {
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action := "action[opPrepare]"
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var volume string
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defer func() {
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if err != nil {
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log.LogErrorf("%s volume:[%v] %v.", action, volume,
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p.LogMessage(p.GetOpMsg(), conn.RemoteAddr().String(), p.StartT, err))
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}
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}()
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req := new(proto.CachePrepareRequest)
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if err = p.UnmarshalDataPb(req); err != nil {
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p.PacketErrorWithBody(proto.OpErr, ([]byte)(err.Error()))
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if e := p.WriteToConn(conn); e != nil {
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log.LogErrorf("%s write to conn %v.", action, e)
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}
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return
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}
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volume = req.CacheRequest.Volume
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p.PacketOkReply()
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if e := p.WriteToConn(conn); e != nil {
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log.LogErrorf("%s write to conn volume:%s %v.", action, volume, e)
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}
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if err = f.cacheEngine.PrepareCache(p.ReqID, req.CacheRequest); err != nil {
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return err
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}
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if len(req.FlashNodes) > 0 {
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f.dispatchRequestToFollowers(req)
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}
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return
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}
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func (f *FlashNode) dispatchRequestToFollowers(request *proto.CachePrepareRequest) {
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req := &proto.CachePrepareRequest{
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CacheRequest: request.CacheRequest,
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FlashNodes: make([]string, 0),
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}
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wg := sync.WaitGroup{}
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for idx, addr := range request.FlashNodes {
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if addr == f.localAddr {
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continue
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}
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wg.Add(1)
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log.LogDebugf("dispatchRequestToFollowers: try to prepare on addr:%s (%d/%d)", addr, idx, len(request.FlashNodes))
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go func(addr string) {
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defer wg.Done()
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if err := f.sendPrepareRequest(addr, req); err != nil {
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log.LogErrorf("dispatchRequestToFollowers: failed to distribute request to addr(%v) err(%v)", addr, err)
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}
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}(addr)
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}
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wg.Wait()
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}
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func (f *FlashNode) sendPrepareRequest(addr string, req *proto.CachePrepareRequest) (err error) {
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action := "action[sendPrepareRequest]"
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conn, err := f.connPool.GetConnect(addr)
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if err != nil {
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return err
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}
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defer func() {
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f.connPool.PutConnect(conn, err != nil)
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}()
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log.LogDebugf("%s to addr:%s request:%v", action, addr, req)
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followerPacket := proto.NewPacketReqID()
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followerPacket.Opcode = proto.OpCachePrepare
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if err = followerPacket.MarshalDataPb(req); err != nil {
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log.LogWarnf("%s failed to MarshalDataPb (%+v) err(%v)", action, followerPacket, err)
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return err
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}
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if err = followerPacket.WriteToNoDeadLineConn(conn); err != nil {
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log.LogWarnf("%s failed to write to addr(%s) err(%v)", action, addr, err)
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return err
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}
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reply := proto.NewPacket()
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if err = reply.ReadFromConn(conn, 30); err != nil {
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log.LogWarnf("%s read reply(%v) from addr(%s) err(%v)", action, reply, addr, err)
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return err
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}
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if reply.ResultCode != proto.OpOk {
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log.LogWarnf("%s reply(%v) from addr(%s) ResultCode(%d)", action, reply, addr, reply.ResultCode)
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return fmt.Errorf("ResultCode(%v)", reply.ResultCode)
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}
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return nil
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}
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