{"id":155158,"date":"2023-05-13T15:54:39","date_gmt":"2023-05-13T07:54:39","guid":{"rendered":"http:\/\/www.idc.net\/help\/155158\/"},"modified":"2023-05-13T15:54:39","modified_gmt":"2023-05-13T07:54:39","slug":"linux%e4%b8%8b%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86%e4%b8%b2%e5%8f%a3%e4%b8%ad%e6%96%ad%ef%bc%9f-linux-%e4%b8%b2%e5%8f%a3%e4%b8%ad%e6%96%ad","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/155158\/","title":{"rendered":"Linux\u4e0b\u5982\u4f55\u5904\u7406\u4e32\u53e3\u4e2d\u65ad\uff1f (linux 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Packet\uff0cI\/O\u8bf7\u6c42\u5305\uff09\u3002\u5f53\u6536\u5230\u4e00\u4e2aIRP\uff0c\u5148\u5224\u65ad\u662f\u5426\u53ef\u7acb\u5373\u5b8c\u6210\uff0c\u53ef\u4ee5\u9a6c\u4e0a\u5904\u7406\u5e76\u8fd4\u56de\uff0c\u5982\u679c\u4e0d\u5141\u8bb8\u5219\u5c06IRP\u63d2\u5728\u76f8\u5e94\u94fe\u8868\u5c3e\uff0c\u5728\u9002\u5f53\u7684\u65f6\u5019\u5982\u8bbe\u5907\u6709\u7a7a\u95f2\u65f6\u5904\u7406\uff0c\u8fd9\u65f6\u5f80\u5f80\u4f1a\u4ea7\u751f\u4e00\u4e2a\u786c\u4ef6\u4e2d\u65ad\uff0c\u6fc0\u53d1DPC\uff08Deferred Procedure Call\uff0c\u6682\u7f13\u8fc7\u7a0b\u8c03\u7528\uff09\u8fc7\u7a0b\uff0c\u7531DPC\u5904\u7406\u51fd\u6570\u9010\u4e2a\u4ece\u94fe\u8868\u5934\u53d6\u51faIRP\u5e76\u8bd5\u7740\u5b8c\u6210\u5b83\u3002\u4e32\u53e3\u9a71\u52a8\u4e2d\u6709\u4ee5\u4e0b\u51e0\u4e2a\u94fe\u8868\u548cDPC(\u5728serial.h\u4e2d\u6709\u5b9a\u4e49):<\/p>\n<p>ReadQueue \u548c CompleteReadDpc<\/p>\n<p>\u7528\u4e8e\u4fdd\u5b58Read IRP\u7684\u94fe\u8868\u548c\u7528\u4e8e\u8c03\u5ea6\u7684DPC\uff0c\u4e0eDPC\u5bf9\u5e94\u7684\u5904\u7406\u51fd\u6570\u662fSerialCompleteRead\uff0c\u5b83\u5728read.c\u6587\u4ef6\u4e2d\uff0c\u8be5\u51fd\u6570\u7684\u4e3b\u8981\u4efb\u52a1\u5c31\u662f\u4eceReadQueue\u4e2d\u63d0\u53d6\u4e0b\u4e00\u4e2aIRP\uff0c\u5e76\u8bd5\u7740\u5b8c\u6210\u5b83\u3002<\/p>\n<p>WriteQueue \u548c CompleteWriteDpc<\/p>\n<p>\u7528\u4e8e\u4fdd\u5b58Write IRP\u7684\u94fe\u8868\u548c\u5bf9\u5e94\u7684DPC\uff0c\u4e0eDPC\u5bf9\u5e94\u7684\u51fd\u6570\u662fSeriaCompleteWrite\uff0c\u5b83\u7684\u5b9e\u73b0\u5728write.c\u4e2d\uff0c\u8be5\u51fd\u6570\u8d1f\u8d23\u4eceWriteQueue\u4e2d\u63d0\u53d6IRP\uff0c\u5e76\u8bd5\u7740\u5b8c\u6210\u5b83\u3002<\/p>\n<p>MaskQueue \u548c CommWaitDpc<\/p>\n<p>\u8fd9\u4e00\u5bf9\u94fe\u8868\u7528\u4e8e\u5904\u7406Windows\u4e32\u53e3\u9a71\u52a8\u7684\u4e00\u4e2a\u7279\u6027\uff1a\u4e8b\u4ef6\u9a71\u52a8\u673a\u5236\u3002\u5b83\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u9884\u8bbe\u4e00\u4e2a\u4e8b\u4ef6\u6807\u5fd7\uff0c\u800c\u540e\u7b49\u5f85\u4e0e\u6807\u5fd7\u5bf9\u5e94\u4e8b\u4ef6\u53d1\u751f\u3002DPC\u6240\u8c03\u7528\u7684\u51fd\u6570\u662fSerialCompleteWait\uff0c\u5b83\u5b9e\u73b0\u5728Waitmask.c\u6587\u4ef6\u4e2d\uff0c\u8be5\u51fd\u6570\u4e5f\u662f\u8bd5\u7740\u4eceMaskQueue\u4e2d\u63d0\u53d6IRP\u5e76\u5b8c\u6210\u5b83\u3002<\/p>\n<p>PurgeQueue<\/p>\n<p>\u8be5\u94fe\u8868\u4e0e\u524d\u9762\u51e0\u4e2a\u7a0d\u6709\u4e0d\u540c\u4f0f\u952e\u6d1e\uff0c\u5b83\u6ca1\u6709\u4e0e\u4e4b\u76f8\u5bf9\u5e94\u7684DPC\u673a\u5236\uff0c\u800c\u662f\u5728\u6bcf\u6b21\u6536\u5230Purge\u8bf7\u6c42\u65f6\u4ecePurgeQueue\u4e2d\u9010\u4e2a\u63d0\u53d6IRP\u5e76\u8bd5\u7740\u5b8c\u6210\uff0c\u56e0\u67d0\u79cd\u539f\u56e0\u4e0d\u80fd\u5b8c\u6210\u65f6\u5219\u63d2\u5165\u94fe\u8868\u3002\u76f8\u5e94\u7684\u51fd\u6570\u662fpurge.c\u6587\u4ef6\u4e2d\u7684SerialStartPurge\u3002<\/p>\n<p>\u4ee5\u4e0a\u673a\u5236\u662f\u4e32\u53e3\u9a71\u52a8\u7a0b\u5e8f\u7684\u91cd\u8981\u5b9e\u73b0\u65b9\u6cd5\uff0c\u5728\u865a\u62df\u4e32\u53e3\u9a71\u52a8\u4e2d\u9700\u8981\u4fdd\u7559\uff0c\u4f46\u4e0d\u540c\u7684\u662f\uff0c\u786c\u4ef6\u4e32\u53e3\u9a71\u52a8\u4e2d\u662fISR\uff08\u4e2d\u65ad\u670d\u52a1\u7a0b\u5e8f\uff09\u6839\u636e\u6536\u3001\u53d1\u6216MODEM\u4e2d\u65ad\u6765\u6fc0\u53d1\u76f8\u5e94\u7684DPC\uff0c\u800c\u5728\u865a\u62df\u4e32\u53e3\u9a71\u52a8\u4e2d\u5c06\u56e0\u5b9e\u9645\u60c5\u51b5\u4e0d\u540c\u4f1a\u6709\u4e0d\u540c\u7684\u6fc0\u53d1\u673a\u5236\u3002<\/p>\n<p>DriverEntry\u7684\u5b9e\u73b0<\/p>\n<p>DriverEntry\u662f\u9a71\u52a8\u7a0b\u5e8f\u7684\u5165\u53e3\u51fd\u6570\uff0c\u76f8\u5f53\u4e8e\u5e94\u7528\u7a0b\u5e8fC\u8bed\u8a00\u4e2d\u7684main\u51fd\u6570\uff0c\u5f00\u53d1\u4e00\u4e2a\u865a\u62df\u4e32\u53e3\u9a71\u52a8\u4eae\u95f7\u9996\u5148\u8981\u4fee\u6539\u7684\u5c31\u662f\u5b83\u3002\u5b83\u7684\u51fd\u6570\u5b9e\u4f53\u5728initunlo.c\u6587\u4ef6\u4e2d\u3002\u53ea\u662f\u5728\u865a\u62df\u4e32\u53e3\u9a71\u52a8\u4e2d\u7531\u4e8e\u4e0d\u4e0e\u5177\u4f53\u7684\u786c\u4ef6\u6253\u4ea4\u9053\uff0c\u5c31\u4e0d\u5b58\u5728\u786c\u4ef6\u8d44\u6e90\u5206\u6790\u3001\u786c\u4ef6\u521d\u59cb\u5316\u3001\u5224\u65ad\u5176\u5de5\u4f5c\u72b6\u6001\u7b49\u5904\u7406\uff0c\u53ea\u9700\u8981\u4e3a\u865a\u62df\u4e32\u5efa\u7acb\u8bbe\u5907\u5bf9\u8c61\u3001\u7b26\u53f7\u94fe\u63a5\u548c\u521d\u59cb\u5316\u6570\u636e\u7ed3\u6784\u3002\u4e00\u4e2a\u5178\u578b\u51fd\u6570\u5b9e\u73b0\u5927\u4f53\u5982\u4e0b\uff1a<\/p>\n<p>NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath)<\/p>\n<p>{<\/p>\n<p>\/*\u586b\u5199DriverObject-&gt;MajorFunction\u6570\u7ec4*\/<\/p>\n<p>\/*\u5efa\u7acb\u8bbe\u5907\u5bf9\u8c61*\/<\/p>\n<p>\/*\u521d\u59cb\u5316SERIAL_DEVCIE_EXETENSION\u6570\u636e\u7ed3\u6784*\/<\/p>\n<p>Status = IoCreateDevice(DriverObject, sizeof(SERIAL_DEVICE_EXTENSION), &amp;uniNameString, FILE_DEVICE_SERIAL_PORT, 0,TRUE,&amp;deviceObject);<\/p>\n<p>\/\/\u521d\u59cb\u5316\u6240\u6709\u94fe\u8868<\/p>\n<p>InitializeListHead(&amp;extension-&gt;ReadQueue);<\/p>\n<p>InitializeListHead(\u2026);<\/p>\n<p>\u2026;<\/p>\n<p>\/\/\u521d\u59cb\u5316\u6240\u6709DPC<\/p>\n<p>KeInitializeDpc(&amp;extension-&gt;CompleteReadDpc,SerailCompleteRead,extension);<\/p>\n<p>KeInitializeDpc(\u2026);<\/p>\n<p>\/*\u5efa\u7acb\u7b26\u53f7\u94fe\u63a5*\/<\/p>\n<p>SerialSetupExternalNaming(extension);<\/p>\n<p>return Status;<\/p>\n<p>}<\/p>\n<p>SerialRead\u548cSerialCompleteRead\u7684\u5b9e\u73b0<\/p>\n<p>\u51fd\u6570SerailRead\u548cSerialCompleteRead\u51b3\u5b9a\u4e86\u5bf9Read IRP\u7684\u54cd\u5e94\u7b56\u7565\uff0c\u5b83\u4eec\u90fd\u5b58\u4e8eread.c\u4e2d\u3002\u4ee5\u4e32\u53e3\u670d\u52a1\u5668\u8981\u7528\u7684\u865a\u62df\u4e32\u53e3\u4e3a\u4f8b\uff0c\u5f53\u4e32\u53e3\u670d\u52a1\u5668\u6536\u5230\u6765\u81ea\u5916\u90e8\u6570\u636e\u65f6\u5c06\u901a\u8fc7\u7f51\u7edc\u53d1\u81f3\u8ba1\u7b97\u673a\uff0c\u8ba1\u7b97\u673a\u5219\u4ea7\u751f\u76f8\u5e94\u7684\u7f51\u7edc\u4e2d\u65ad\u5e76\u8fdb\u884c\u534f\u8bae\u6570\u636e\u5904\u7406\u3002\u7f51\u7edc\u63a5\u6536\u7ebf\u7a0b\u7f13\u5b58\u65b0\u6536\u5230\u7684\u6570\u636e\u5e76\u6fc0\u6d3bCompleteReadDpc\uff0c\u4ece\u800cSerialCompleteReadIrp\u5f97\u5230\u8c03\u7528\uff0c\u5b83\u518d\u8c03\u7528CompleteReadIrp\u5bf9\u6bcf\u4e2aIRP\u8fdb\u884c\u5904\u7406\u3002\u5b83\u4eec\u7684\u5b9e\u73b0\u5927\u4f53\u5982\u4e0b\uff1a<\/p>\n<p>NTSTATUS SerialRead(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)<\/p>\n<p>{<\/p>\n<p>\/*\u6b64\u5904\u7565\u53bb\u53d8\u91cf\u58f0\u660e\u548c\u521d\u59cb\u5316*\/<\/p>\n<p>\/*\u63d0\u53d6IRP\u4e2d\u76f8\u5173\u7684\u6570\u636e*\/<\/p>\n<p>stack = IoGetCurrentIrpStackLocation(Irp);<\/p>\n<p>ReadLen = stack-&gt;Parameters.Read.Length;<\/p>\n<p>\/*\u5148\u770b\u672c\u5730\u7f13\u51b2\u6709\u6570\u636e\u5426\uff1f\u6709\u7684\u8bdd\u5148\u8bfb\u53d6*\/<\/p>\n<p>if(Extension-&gt;InCounter &gt; 0 )<\/p>\n<p>{ \/\/\u6ce8\u610f\u8fd9\u91cc\u8981\u52a0\u9501\uff0c\u4ee5\u9632\u6570\u636e\u8bbf\u95ee\u51b2\u7a81<\/p>\n<p>KeAcquireSpinLock(&amp;Extension-&gt;<\/p>\n<p>ReadBufferLock,&amp;lIrql);<\/p>\n<p>FirstRead = (ReadLen&gt;Extension-&gt;<\/p>\n<p>InCounter)? Extension-&gt;InCounter: ReadLen;<\/p>\n<p>RtlCopyMemory(Irp-&gt;AssociatedIrp.<\/p>\n<p>SystemBuffer,Extension-&gt;pInBuffer,FirstRead);<\/p>\n<p>Extension-&gt;InCounter -= FirstRead;<\/p>\n<p>ReadLen -= FirstRead;<\/p>\n<p>KeReleaseSpinLock(&amp;Extension-&gt;<\/p>\n<p>ReadBufferLock,lIrql);\/\/\u91ca\u653e\u9501<\/p>\n<p>}<\/p>\n<p>\/*\u662f\u5426\u5df2\u8bfb\u5230\u8db3\u591f\u6570\u636e\uff1f\u662f\u7684\u8bdd\u5219\u5b8c\u6210\u8be5IRP*\/<\/p>\n<p>if( 0 == ReadLen)<\/p>\n<p>{<\/p>\n<p>status=STATUS_SUCCESS;<\/p>\n<p>Irp-&gt;IoStatus.Status = status;<\/p>\n<p>Irp-&gt;IoStatus.Information = FirstRead;<\/p>\n<p>IoCompleteRequest(Irp,0);<\/p>\n<p>return status;<\/p>\n<p>}<\/p>\n<p>\/*\u6ca1\u6709\u5219\u5c06IRP\u63d2\u5165\u961f\u5217\u4e2d\uff0c\u901a\u8fc7\u7f51\u7edc\u5411\u4e32\u53e3\u670d\u52a1\u5668\u53d1\u51fa\u8bfb\u6570\u636e\u8bf7\u6c42*\/<\/p>\n<p>IoMarkIrpPending(Irp);<\/p>\n<p>InsertWaitList(Extension-&gt;ReadQueue,Irp);<\/p>\n<p>status = TdiSendAsync(Extension-&gt;ComChannel,pAckPacket,PacketLen(pAckPacket),(PVOID)ReadAckComplete,Irp);<\/p>\n<p>\/*\u8fd4\u56dePENDING\uff0c\u8868\u793a\u8be5IRP\u5c1a\u6ca1\u6709\u5b8c\u6210*\/<\/p>\n<p>return STATUS_PENDING;<\/p>\n<p>}<\/p>\n<p>Void CompleteReadIrp(IN PSERIAL_DEVICE_EXTENSION extension,IN PIRP Irp,IN PUCHAR pInData,IN ULONG Length )<\/p>\n<p>{<\/p>\n<p>\/*\u6b64\u5904\u7565\u53bb\u53d8\u91cf\u58f0\u660e\u548c\u521d\u59cb\u5316*\/<\/p>\n<p>\/*\u8bfb\u53d6\u65b0\u6570\u636e*\/<\/p>\n<p>ReadLen = (ReadLen &gt; Length)? Length : ReadLen;<\/p>\n<p>if(ReadLen != 0)<\/p>\n<p>{<\/p>\n<p>RtlCopyMemory(pReadAsync-&gt;<\/p>\n<p>pReadBuffer,pInData,ReadLen);<\/p>\n<p>pReadAsync-&gt;pReadBuffer += ReadLen;<\/p>\n<p>pReadAsync-&gt;ReadAlready += ReadLen;<\/p>\n<p>extension-&gt;PerfStats.ReceivedCount +=<\/p>\n<p>ReadLen;<\/p>\n<p>}<\/p>\n<p>else<\/p>\n<p>{<\/p>\n<p>\/*\u56e0\u4e3a\u4e32\u53e3\u670d\u52a1\u5668\u7aef\u53ea\u6709\u5728\u5df2\u7ecf\u6709\u4e86\u76f8\u5e94\u7684\u6570\u636e\u6216\u8d85\u8fc7\u65f6\u95f4\uff08\u6b64\u65f6\uff0cLength=0\uff09\u624d\u4f1a\u53d1\u6765\u5e94\u7b54\u5e76\u6fc0\u6d3b\u672cDPC\u8fc7\u7a0b\uff0c\u6240\u4ee5\u6b64\u65f6\u5df2\u7ecf\u8d85\u65f6\uff0c\u4e3a\u4e86\u4fbf\u4e8e\u7ed3\u675f\u672cIRP\uff0c\u8fd9\u91cc\u6709\u610f\u6539\u53d8TotalNeedRead\uff0c\u9020\u6210\u63a5\u6536\u5b8c\u6bd5\u7684\u5047\u8c61*\/<\/p>\n<p>pReadAsync-&gt;TotalNeedRead =<\/p>\n<p>pReadAsync-&gt;ReadAlready;<\/p>\n<p>}<\/p>\n<p>if(pReadAsync-&gt;TotalNeedRead == pReadAsync-&gt;ReadAlready)<\/p>\n<p>{<\/p>\n<p>\/*\u8be5IRP\u662f\u5426\u5df2\u7ecf\u63a5\u6536\u5b8c\u6bd5\uff0c\u662f\u7684\u8bdd\u5219\u7ed3\u675f\u8be5<\/p>\n<p>IRP*\/<\/p>\n<p>EndReadIrp(Irp)\uff1b<\/p>\n<p>\/*\u4eceReadQueue\u4e2d\u53d6\u4e0b\u4e00\u4e2aIRP*\/<\/p>\n<p>}<\/p>\n<p>\/*\u672cIRP\u6ca1\u6709\u5b8c\u6210\u4e5f\u6ca1\u6709\u8d85\u65f6\uff0c\u5219\u7ee7\u7eed\u7b49\u5f85\u672cDPC\u4e0b\u6b21\u88ab\u6fc0\u6d3b\uff0c\u6ce8\u610f\u6b64\u65f6\u8981\u5224\u65adIRP\u662f\u5426\u88ab\u8981\u6c42\u53d6\u6d88*\/<\/p>\n<p>}<\/p>\n<p>SerialWrite\u548cSerailCompleteWrite\u7684\u5b9e\u73b0<\/p>\n<p>SerialWrite\u548cSerailCompleteWrite\u51b3\u5b9a\u4e86Write IRP\u7684\u5b9e\u73b0\u3002\u5728SerialWrite\u4e2d\u8c03\u7528\u4e86\u7f51\u7edc\u53d1\u9001\u51fd\u6570TdiSendAsync,\u5f53\u8be5\u53d1\u9001\u5b8c\u6210\u540e\u5c06\u6fc0\u6d3bCompleteWriteDpc\uff0c\u8c03\u5ea6SerialCompleteWrite\u51fd\u6570\uff0c\u800c\u5b83\u4e3b\u8981\u5c31\u662f\u53d6\u51fa\u5f53\u524d\u7684WriteIRP,\u8bbe\u7f6e\u5df2\u7ecf\u53d1\u9001\u7684\u6570\u636e\u6570\u91cf\uff0c\u8c03\u7528CompleteWriteIrp\u505a\u8be5IRP\u7684\u8fdb\u4e00\u6b65\u5904\u7406\u3002\u5b83\u4eec\u5927\u4f53\u5982\u4e0b\uff1a<\/p>\n<p>NTSTATUS SerialWrite(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)<\/p>\n<p>{<\/p>\n<p>\/*\u6b64\u5904\u7565\u53bb\u53d8\u91cf\u58f0\u660e\u548c\u521d\u59cb\u5316*\/<\/p>\n<p>\/*\u4eceIRP\u4e2d\u63d0\u53d6\u6709\u5173\u6570\u636e*\/<\/p>\n<p>stack=IoGetCurrentIrpStackLocation(Irp);<\/p>\n<p>SendLen = stack-&gt;Parameters.Write.Length;<\/p>\n<p>\/*\u4e3a\u7f51\u7edc\u53d1\u9001\u548c\u5f02\u6b65\u64cd\u4f5c\u5206\u914d\u7f13\u51b2,\u5728CompleteWrite\u4e2d\u5168\u90e8\u6570\u636e\u53d1\u9001\u5b8c\u540e\u91ca\u653e*\/<\/p>\n<p>pWriteAsync = ExAllocatePool(NonPagedPool,<\/p>\n<p>SendLen+PACKET_HEADER_LEN+sizeof(WRITE_ASYNC));<\/p>\n<p>if(pWriteAsync == NULL)<\/p>\n<p>{<\/p>\n<p>\/\/\u9519\u8bef\u5904\u7406<\/p>\n<p>}<\/p>\n<p>\/\/\u4fdd\u5b58\u5f02\u6b65\u6570\u636e<\/p>\n<p>\u2026<\/p>\n<p>\/\/\u8bbe\u7f6e\u7f51\u7edc\u53d1\u9001\u6570\u636e\u5305<\/p>\n<p>BuildDataPacket(pPacket,WRITE,(USHORT)SendLen,pWriteAsync-&gt;pWriteBuffer);<\/p>\n<p>\/*\u5148\u5c06IRP\u6682\u65f6\u963b\u585e\u5e76\u63d2\u5165\u961f\u5217\uff0c\u5728CompleteWrite\u4e2d\u5b8c\u6210*\/<\/p>\n<p>IoMarkIrpPending(Irp);<\/p>\n<p>InsertWaitList(extension-&gt;WriteQueue, Irp);<\/p>\n<p>\/*\u5c06\u5199\u8bf7\u6c42\u548c\u76f8\u5173\u6570\u636e\u901a\u8fc7\u7f51\u7edc\u53d1\u5411\u4e32\u53e3\u670d\u52a1\u5668\uff0c\u7531\u5b83\u8d1f\u8d23\u5c06\u6570\u636e\u4f20\u5230\u5177\u4f53\u4e32\u53e3\u8bbe\u5907*\/<\/p>\n<p>status = TdiSendAsync(Extension-&gt;ComChannel,pPacket,PacketLen(pPacket),(PVOID)CompleteWriteIrp,Irp);<\/p>\n<p>\/\/\u7edf\u8ba1\u6570\u636e\u7d2f\u52a0<\/p>\n<p>Extension-&gt;PerfStats.TranittedCount += SendLen;<\/p>\n<p>return STATUS_PENDING;<\/p>\n<p>}<\/p>\n<p>NTSTATUS CompleteWriteIrp(IN PDEVICE_OBJECT deviceobject,IN PIRP pIrp,IN PVOID context)<\/p>\n<p>{<\/p>\n<p>\/*\u6b64\u5904\u7565\u53bb\u53d8\u91cf\u58f0\u660e\u548c\u521d\u59cb\u5316*\/<\/p>\n<p>SendLen=pWriteAsync-&gt;TotalNeedWrite \u2013 pWriteAsync-&gt;WroteAlready;<\/p>\n<p>if(SendLen == 0)\/\/\u5168\u90e8\u6570\u636e\u53d1\u9001\u5b8c\u6bd5<\/p>\n<p>{<\/p>\n<p>EndWaitWriteIrp(pWriteIrp,STATUS_SUCCESS,<\/p>\n<p>pWriteAsync-&gt;WroteAlready,pWriteAsync);<\/p>\n<p>\/\/\u4eceWriteQueue\u4e2d\u53d6\u4e0b\u4e00\u4e2aIRP;<\/p>\n<p>}<\/p>\n<p>else \/\/\u53d1\u9001\u5269\u4f59\u6570\u636e<\/p>\n<p>{<\/p>\n<p>if(pWriteIrp-&gt;Cancel)<\/p>\n<p>{<\/p>\n<p>\/\/IRP\u88ab\u8981\u6c42\u53d6\u6d88\uff0c\u5b8c\u6210WriteIrp<\/p>\n<p>EndWaitWriteIrp(pWriteIrp,STATUS_CANCELLED,<\/p>\n<p>pWriteAsync-&gt;WroteAlready,pWriteAsync);<\/p>\n<p>return STATUS_CANCELED;<\/p>\n<p>}<\/p>\n<p>else<\/p>\n<p>{<\/p>\n<p>\/\/\u518d\u6b21\u8bbe\u7f6e\u7f51\u7edc\u6570\u636e\u5305\u5e76\u53d1\u9001<\/p>\n<p>BuildDataPacket(\u2026);<\/p>\n<p>status = TdiSendAsync(\u2026);<\/p>\n<p>\/\/\u7edf\u8ba1\u6570\u636e\u7d2f\u52a0<\/p>\n<p>Extension-&gt;PerfStats.TranittedCount +=<\/p>\n<p>SendLen;<\/p>\n<p>return STATUS_MORE_PROCESSING_REQUIRED;<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<p>\u5176\u4ed6\u51e0\u4e2a\u63a5\u53e3\u51fd\u6570\u7684\u5b9e\u73b0<\/p>\n<p>\u9664Read\/Write\u5916\uff0cSerialUnload\u3001SerialCreateOpen\u3001 SerialClose\u3001SerialCleanup\u3001SerailFlush\u7b49\u8c03\u7528\u63a5\u53e3\u662f\u786c\u4ef6\u76f8\u5173\u6027\u6bd4\u8f83\u5f31\u7684\u63a5\u53e3\u51fd\u6570\uff0c\u57fa\u672c\u4e0d\u8981\u4fee\u6539\uff0c\u76f4\u63a5\u5220\u9664\u539f\u6765\u64cd\u4f5c\u786c\u4ef6\u7684\u90e8\u5206\u5373\u53ef\u3002\u590d\u6742\u4e00\u70b9\u5c31\u662fSerialIoControl\uff0c\u8be5\u63a5\u53e3\u51fd\u6570\u5305\u542b\u6709\u5927\u91cf\u8bbe\u7f6e\u3001\u8bfb\u53d6\u4e32\u53e3\u786c\u4ef6\u72b6\u6001\u7684\u5904\u7406\uff0c\u53ef\u5efa\u7acb\u4e00\u4e2a\u672c\u5730\u6570\u636e\u7ed3\u6784\u968f\u65f6\u4fdd\u5b58\u865a\u62df\u4e32\u53e3\u7684\u5f53\u524d\u786c\u4ef6\u72b6\u6001\u3002\u540c\u65f6\u4e3a\u4e86\u4fdd\u8bc1\u4e32\u53e3\u670d\u52a1\u5668\u7aef\u7684\u771f\u5b9e\u4e32\u53e3\u72b6\u6001\u548c\u4e0a\u5c42\u8f6f\u4ef6\u8981\u6c42\u7684\u4e00\u81f4\uff0c\u9700\u8981\u5c06\u6240\u6709\u8bbe\u7f6e\u8bf7\u6c42\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u5230\u670d\u52a1\u5668\u7aef\uff0c\u7531\u5b83\u8d1f\u8d23\u6539\u53d8\u771f\u5b9e\u786c\u4ef6\u7684\u72b6\u6001\u3002<\/p>\n<p>\u5173\u4e8elinux 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\/>\u540e\u6d6a\u4e91\uff08www.IDC.Net\uff09\u63d0\u4f9b\u7b80\u5355\u597d\u7528\uff0c\u4ef7\u683c\u539a\u9053\u7684\u9999\u6e2f\/\u7f8e\u56fd\u4e91\u670d\u52a1\u5668\u548c\u72ec\u7acb\u670d\u52a1\u5668\u3002IDC+ISP+ICP\u8d44\u8d28\u3002ARIN\u548cAPNIC\u4f1a\u5458\u3002\u6210\u719f\u6280\u672f\u56e2\u961f15\u5e74\u884c\u4e1a\u7ecf\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u968f\u7740\u8ba1\u7b97\u673a\u6280\u672f\u7684\u4e0d\u65ad\u53d1\u5c55\uff0c\u4e32\u53e3\u63a5\u53e3\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u3001\u533b\u7597\u8bbe\u5907\u3001\u6d88\u8d39\u7535\u5b50\u7b49\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002\u800c\u5bf9\u4e8eLinux\u64cd\u4f5c\u7cfb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-155158","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/155158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=155158"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/155158\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=155158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=155158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=155158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}