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36 // File: AFSFlushBuffers.cpp
39 #include "AFSCommon.h"
42 AFSFlushBuffers( IN PDEVICE_OBJECT LibDeviceObject,
46 UNREFERENCED_PARAMETER(LibDeviceObject);
47 NTSTATUS ntStatus = STATUS_SUCCESS;
48 IO_STACK_LOCATION *pIrpSp = IoGetCurrentIrpStackLocation( Irp);
49 PFILE_OBJECT pFileObject = pIrpSp->FileObject;
50 AFSFcb *pFcb = (AFSFcb *)pFileObject->FsContext;
51 AFSCcb *pCcb = (AFSCcb *)pFileObject->FsContext2;
52 IO_STATUS_BLOCK iosb = {0};
53 BOOLEAN bReleaseSectionObject = FALSE;
55 pIrpSp = IoGetCurrentIrpStackLocation( Irp);
63 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
64 AFS_TRACE_LEVEL_ERROR,
65 "AFSFlushBuffers Attempted access (%p) when pFcb == NULL\n",
68 try_return( ntStatus = STATUS_INVALID_DEVICE_REQUEST);
71 if( pFcb->Header.NodeTypeCode == AFS_ROOT_FCB ||
72 pFcb->Header.NodeTypeCode == AFS_ROOT_ALL )
76 // Once we support ADS's on directories we need to perform a flush ehre
79 try_return( ntStatus = STATUS_SUCCESS);
82 else if (pFcb->Header.NodeTypeCode != AFS_FILE_FCB)
85 // Nothing to flush Everything but files are write through
87 try_return( ntStatus = STATUS_INVALID_PARAMETER);
90 AFSDbgTrace(( AFS_SUBSYSTEM_LOCK_PROCESSING,
91 AFS_TRACE_LEVEL_VERBOSE,
92 "AFSFlushBuffers Acquiring Fcb SectionObject lock %p SHARED %08lX\n",
93 &pFcb->NPFcb->SectionObjectResource,
94 PsGetCurrentThread()));
96 AFSAcquireShared( &pFcb->NPFcb->SectionObjectResource,
99 bReleaseSectionObject = TRUE;
102 // The flush consists of two parts. We firstly flush our
103 // cache (if we have one), then we tell the service to write
104 // to the remote server
109 CcFlushCache( &pFcb->NPFcb->SectionObjectPointers, NULL, 0, &iosb);
111 if (!NT_SUCCESS( iosb.Status ))
114 AFSDbgTrace(( AFS_SUBSYSTEM_IO_PROCESSING,
115 AFS_TRACE_LEVEL_ERROR,
116 "AFSFlushBuffers CcFlushCache [1] failure FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX Bytes 0x%08lX\n",
117 pFcb->ObjectInformation->FileId.Cell,
118 pFcb->ObjectInformation->FileId.Volume,
119 pFcb->ObjectInformation->FileId.Vnode,
120 pFcb->ObjectInformation->FileId.Unique,
124 try_return( ntStatus = iosb.Status );
127 __except( EXCEPTION_EXECUTE_HANDLER)
130 try_return( ntStatus = GetExceptionCode());
133 AFSDbgTrace(( AFS_SUBSYSTEM_LOCK_PROCESSING,
134 AFS_TRACE_LEVEL_VERBOSE,
135 "AFSFlushBuffers Releasing Fcb SectionObject lock %p SHARED %08lX\n",
136 &pFcb->NPFcb->SectionObjectResource,
137 PsGetCurrentThread()));
139 AFSReleaseResource( &pFcb->NPFcb->SectionObjectResource);
141 bReleaseSectionObject = FALSE;
144 // Now, flush to the server - if there is stuff to do
147 ntStatus = AFSFlushExtents( pFcb,
150 if( !NT_SUCCESS( ntStatus))
153 AFSReleaseExtentsWithFlush( pFcb,
157 ntStatus = STATUS_SUCCESS;
162 if ( bReleaseSectionObject)
165 AFSDbgTrace(( AFS_SUBSYSTEM_LOCK_PROCESSING,
166 AFS_TRACE_LEVEL_VERBOSE,
167 "AFSFlushBuffers Releasing Fcb SectionObject lock %p SHARED %08lX\n",
168 &pFcb->NPFcb->SectionObjectResource,
169 PsGetCurrentThread()));
171 AFSReleaseResource( &pFcb->NPFcb->SectionObjectResource);
174 AFSCompleteRequest( Irp, ntStatus);