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36 // File: AFSFlushBuffers.cpp
39 #include "AFSCommon.h"
42 AFSFlushBuffers( IN PDEVICE_OBJECT LibDeviceObject,
46 NTSTATUS ntStatus = STATUS_SUCCESS;
47 IO_STACK_LOCATION *pIrpSp = IoGetCurrentIrpStackLocation( Irp);
48 PFILE_OBJECT pFileObject = pIrpSp->FileObject;
49 AFSFcb *pFcb = (AFSFcb *)pFileObject->FsContext;
50 AFSCcb *pCcb = (AFSCcb *)pFileObject->FsContext2;
51 IO_STATUS_BLOCK iosb = {0};
52 BOOLEAN bReleaseSectionObject = FALSE;
54 pIrpSp = IoGetCurrentIrpStackLocation( Irp);
62 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
63 AFS_TRACE_LEVEL_ERROR,
64 "AFSFlushBuffers Attempted access (%08lX) when pFcb == NULL\n",
67 try_return( ntStatus = STATUS_INVALID_DEVICE_REQUEST);
70 if( pFcb->Header.NodeTypeCode == AFS_ROOT_FCB ||
71 pFcb->Header.NodeTypeCode == AFS_ROOT_ALL )
75 // Once we support ADS's on directories we need to perform a flush ehre
78 try_return( ntStatus = STATUS_SUCCESS);
81 else if (pFcb->Header.NodeTypeCode != AFS_FILE_FCB)
84 // Nothing to flush Everything but files are write through
86 try_return( ntStatus = STATUS_INVALID_PARAMETER);
89 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
90 AFS_TRACE_LEVEL_VERBOSE,
91 "AFSFlushBuffers Acquiring Fcb SectionObject lock %08lX SHARED %08lX\n",
92 &pFcb->NPFcb->SectionObjectResource,
93 PsGetCurrentThread());
95 AFSAcquireShared( &pFcb->NPFcb->SectionObjectResource,
98 bReleaseSectionObject = TRUE;
101 // The flush consists of two parts. We firstly flush our
102 // cache (if we have one), then we tell the service to write
103 // to the remote server
108 CcFlushCache( &pFcb->NPFcb->SectionObjectPointers, NULL, 0, &iosb);
110 if (!NT_SUCCESS( iosb.Status ))
113 AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
114 AFS_TRACE_LEVEL_ERROR,
115 "AFSFlushBuffers CcFlushCache [1] failure FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX Bytes 0x%08lX\n",
116 pFcb->ObjectInformation->FileId.Cell,
117 pFcb->ObjectInformation->FileId.Volume,
118 pFcb->ObjectInformation->FileId.Vnode,
119 pFcb->ObjectInformation->FileId.Unique,
123 try_return( ntStatus = iosb.Status );
126 __except( EXCEPTION_EXECUTE_HANDLER)
129 try_return( ntStatus = GetExceptionCode());
132 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
133 AFS_TRACE_LEVEL_VERBOSE,
134 "AFSFlushBuffers Releasing Fcb SectionObject lock %08lX SHARED %08lX\n",
135 &pFcb->NPFcb->SectionObjectResource,
136 PsGetCurrentThread());
138 AFSReleaseResource( &pFcb->NPFcb->SectionObjectResource);
140 bReleaseSectionObject = FALSE;
143 // Now, flush to the server - if there is stuff to do
146 ntStatus = AFSFlushExtents( pFcb,
149 if( !NT_SUCCESS( ntStatus))
152 AFSReleaseExtentsWithFlush( pFcb,
156 ntStatus = STATUS_SUCCESS;
161 if ( bReleaseSectionObject)
164 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
165 AFS_TRACE_LEVEL_VERBOSE,
166 "AFSFlushBuffers Releasing Fcb SectionObject lock %08lX SHARED %08lX\n",
167 &pFcb->NPFcb->SectionObjectResource,
168 PsGetCurrentThread());
170 AFSReleaseResource( &pFcb->NPFcb->SectionObjectResource);
173 AFSCompleteRequest( Irp, ntStatus);