mirror of
https://github.com/cubefs/cubefs.git
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493af438b0
1.try other hosts for network errors 2.use single instance for File and Dir object metanode: 1.use tcp packet notify all raft followers to free inodes datanode: 1.remove read check appliedID 2.change extentcache fp to 100 3.fix always repair has delete extents repl: 1.modify funcName from reciveFromFollower to checkLocalResultAndReceiveFromFollower
119 lines
3.8 KiB
Go
119 lines
3.8 KiB
Go
// Copyright 2018 The Chubao 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 stream
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import (
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"fmt"
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"github.com/chubaofs/cfs/proto"
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"github.com/chubaofs/cfs/sdk/data/wrapper"
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"github.com/chubaofs/cfs/util"
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"github.com/chubaofs/cfs/util/log"
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"github.com/juju/errors"
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"hash/crc32"
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"net"
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)
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// ExtentReader defines the struct of the extent reader.
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type ExtentReader struct {
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inode uint64
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key *proto.ExtentKey
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dp *wrapper.DataPartition
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}
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// NewExtentReader returns a new extent reader.
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func NewExtentReader(inode uint64, key *proto.ExtentKey, dp *wrapper.DataPartition) *ExtentReader {
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return &ExtentReader{
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inode: inode,
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key: key,
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dp: dp,
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}
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}
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// String returns the string format of the extent reader.
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func (reader *ExtentReader) String() (m string) {
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return fmt.Sprintf("inode (%v) extentKey(%v)", reader.inode,
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reader.key.Marshal())
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}
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// Read reads the extent request.
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func (reader *ExtentReader) Read(req *ExtentRequest) (readBytes int, err error) {
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offset := req.FileOffset - int(reader.key.FileOffset) + int(reader.key.ExtentOffset)
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size := req.Size
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reqPacket := NewReadPacket(reader.key, offset, size, reader.inode, req.FileOffset)
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sc := NewStreamConn(reader.dp)
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log.LogDebugf("ExtentReader Read enter: size(%v) req(%v) reqPacket(%v)", size, req, reqPacket)
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err = sc.Send(reqPacket, func(conn *net.TCPConn) (error, bool) {
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readBytes = 0
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for readBytes < size {
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replyPacket := NewReply(reqPacket.ReqID, reader.dp.PartitionID, reqPacket.ExtentID)
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bufSize := util.Min(util.ReadBlockSize, size-readBytes)
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replyPacket.Data = req.Data[readBytes : readBytes+bufSize]
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e := replyPacket.readFromConn(conn, proto.ReadDeadlineTime)
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if e != nil {
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log.LogErrorf("Extent Reader Read: failed to read from connect, readBytes(%v) err(%v)", readBytes, e)
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// Upon receiving NotALeaderError, other hosts will be retried.
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return NotALeaderError, false
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}
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//log.LogDebugf("ExtentReader Read: ResultCode(%v) req(%v) reply(%v) readBytes(%v)", replyPacket.GetResultMsg(), reqPacket, replyPacket, readBytes)
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if replyPacket.ResultCode == proto.OpAgain {
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return nil, true
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}
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e = reader.checkStreamReply(reqPacket, replyPacket)
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if e != nil {
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// Dont change the error message, since the caller will
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// check if it is NotLeaderErr.
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return e, false
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}
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readBytes += int(replyPacket.Size)
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}
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return nil, false
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})
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if err != nil {
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log.LogErrorf("Extent Reader Read: err(%v) req(%v) reqPacket(%v)", err, req, reqPacket)
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}
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log.LogDebugf("ExtentReader Read exit: req(%v) reqPacket(%v) readBytes(%v) err(%v)", req, reqPacket, readBytes, err)
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return
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}
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func (reader *ExtentReader) checkStreamReply(request *Packet, reply *Packet) (err error) {
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if reply.ResultCode == proto.OpNotLeaderErr {
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return NotALeaderError
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}
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if reply.ResultCode != proto.OpOk {
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err = errors.New(fmt.Sprintf("checkStreamReply: ResultCode(%v) NOK", reply.GetResultMsg()))
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return
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}
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if !request.isValidReadReply(reply) {
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err = errors.New(fmt.Sprintf("checkStreamReply: inconsistent req and reply, req(%v) reply(%v)", request, reply))
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return
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}
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expectCrc := crc32.ChecksumIEEE(reply.Data[:reply.Size])
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if reply.CRC != expectCrc {
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err = errors.New(fmt.Sprintf("checkStreamReply: inconsistent CRC, expectCRC(%v) replyCRC(%v)", expectCrc, reply.CRC))
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return
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}
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return nil
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}
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