1249 lines
37 KiB
C
1249 lines
37 KiB
C
/*++
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||
|
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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||
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||
persist.c
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Abstract:
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This module contains routines for handling the state file for persistent
|
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file handles.
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||
Author:
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|
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Andy Herron (andyhe) 17-Nov-1999
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Revision History:
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--*/
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#include "precomp.h"
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#include "persist.tmh"
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#pragma hdrstop
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//
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// structures specific to this module only.
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//
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#ifdef INCLUDE_SMB_PERSISTENT
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typedef enum _FLUSH_STATE {
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FlushStateNotPosted,
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FlushStatePosted,
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FlushStateCompleted,
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FlushStateInError
|
||
} FLUSH_STATE, *PFLUSH_STATE;
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||
|
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typedef struct _PERSISTENT_RECORD_LIST_ENTRY {
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||
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LIST_ENTRY PendingListEntry;
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ULONG FileOffset;
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||
FLUSH_STATE FlushState;
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||
PWORK_CONTEXT WorkContext;
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PERSISTENT_RECORD;
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} PERSISTENT_RECORD_LIST_ENTRY, *PPERSISTENT_RECORD_LIST_ENTRY;
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#define INITIAL_BITMAP_LENGTH 512
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||
|
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typedef struct _PERSISTENT_SHARE_INFO {
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||
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PSHARE Share;
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||
|
||
LIST_ENTRY UpdatesPendingList;
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||
|
||
UNICODE_STRING StateFileName;
|
||
|
||
HANDLE FileHandle;
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||
|
||
RTL_BITMAP BitMap;
|
||
ULONG TotalEntries;
|
||
ULONG FreeEntries;
|
||
ULONG HintIndex;
|
||
|
||
ULONG LastIdAccepted;
|
||
ULONG LastIdCommitted;
|
||
|
||
SRV_LOCK Lock;
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||
|
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ULONG FirstRecord;
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||
|
||
WCHAR NameBuffer[1];
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||
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} PERSISTENT_SHARE_INFO, *PPERSISTENT_SHARE_INFO;
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||
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#define BITMAP_TO_STATE_FILE_INDEX( _shareInfo, _index ) \
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( (_shareInfo)->FirstRecord + ((_index) * sizeof( PERSISTENT_RECORD )))
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||
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PPERSISTENT_RECORD_LIST_ENTRY
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||
SrvGetPersistentRecord (
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IN PWORK_CONTEXT WorkContext
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||
);
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VOID
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SrvFreePersistentRecord (
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PPERSISTENT_RECORD_LIST_ENTRY Record
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);
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NTSTATUS
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SrvPostPersistentRecord (
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IN PWORK_CONTEXT WorkContext,
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IN PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
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OUT PULONG TransactionId
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);
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NTSTATUS
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SrvFlushPersistentRecords (
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IN PWORK_CONTEXT WorkContext,
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IN ULONG TransactionId
|
||
);
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NTSTATUS
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SrvPersistSession(
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IN PWORK_CONTEXT WorkContext,
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PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
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ULONG *SessionId,
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ULONG *ClientId
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);
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NTSTATUS
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SrvPersistConnection(
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IN PWORK_CONTEXT WorkContext,
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PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
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ULONG *ClientId
|
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);
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||
|
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unsigned long
|
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Crc32(
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IN unsigned long cbBuffer,
|
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IN unsigned char *pbBuffer
|
||
);
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||
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#if 0
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VOID
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Crc32( unsigned long dwCrc,
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unsigned long cbBuffer,
|
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LPVOID pvBuffer,
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unsigned long *pNewCrc);
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#endif
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, SrvPostPersistentOpen )
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#pragma alloc_text( PAGE, SrvPersistSession )
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#pragma alloc_text( PAGE, SrvPersistConnection )
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#pragma alloc_text( PAGE, SrvGetPersistentRecord )
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#pragma alloc_text( PAGE, SrvPostPersistentRecord )
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#pragma alloc_text( PAGE, SrvFlushPersistentRecords )
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#pragma alloc_text( PAGE, SrvSetupPersistentShare )
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#pragma alloc_text( PAGE, SrvClosePersistentShare )
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#pragma alloc_text( PAGE, Crc32 )
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#endif
|
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|
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SMB_STATUS
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SrvPostPersistentOpen (
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IN OUT PWORK_CONTEXT WorkContext,
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IN SMB_STATUS SmbStatus
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)
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/*++
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Routine Description:
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Writes an open for the given RFCB to the state file.
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Arguments:
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WorkContext - has the RFCB
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SmbStatus - status that the calling routine wants to pass back to
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SrvProcessSmb et al.
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Return Value:
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Return value to pass back to SrvProcessSmb et al.
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--*/
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{
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PPERSISTENT_RECORD_LIST_ENTRY persistentRecord = NULL;
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ULONG clientId;
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ULONG sessionId;
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NTSTATUS status;
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PRFCB rfcb = WorkContext->Rfcb;
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PLFCB lfcb = rfcb->Lfcb;
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PMFCB mfcb = lfcb->Mfcb;
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ULONG transactionId;
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PAGED_CODE( );
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if (WorkContext->Session == NULL ||
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WorkContext->Session->PersistentId == 0 ||
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lfcb->TreeConnect->Share->PersistentState == PersistentStateInError) {
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IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: session 0x%x doesn't support persistent handles.\n", WorkContext->Session ));
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}
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return SmbStatus;
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}
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persistentRecord = SrvGetPersistentRecord( WorkContext );
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if (persistentRecord == NULL) {
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IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: Unable to allocate record for 0x%lx\n", WorkContext ));
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}
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return SmbStatus;
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}
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IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: Post persistent open wc=0x%lx, record 0x%lx\n",
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WorkContext, persistentRecord ));
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}
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status = SrvPersistSession( WorkContext,
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persistentRecord,
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&sessionId,
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&clientId
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);
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if (!NT_SUCCESS(status)) {
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IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: failed to persist sess, status 0x%lx\n", status ));
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}
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SrvFreePersistentRecord( persistentRecord );
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return SmbStatus;
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}
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ASSERT( clientId != 0 );
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ASSERT( sessionId != 0 );
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ASSERT( rfcb != NULL );
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if (rfcb->PagedRfcb->PersistentId == 0) {
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ACQUIRE_LOCK( &rfcb->Lfcb->Mfcb->NonpagedMfcb->Lock );
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if (rfcb->PagedRfcb->PersistentId == 0) {
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LONG uniqueId = 0;
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while (uniqueId == 0) {
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uniqueId = InterlockedIncrement( &SrvGlobalPersistentRfcbId );
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}
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rfcb->PagedRfcb->PersistentId = uniqueId;
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rfcb->PagedRfcb->PersistentState = PersistentStateActive;
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}
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RELEASE_LOCK( &rfcb->Lfcb->Mfcb->NonpagedMfcb->Lock );
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}
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//
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// now setup the persistent record as it should exist on disk for this
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// file open.
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//
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persistentRecord->PersistState = PersistentStateActive;
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persistentRecord->PersistOperation = PersistentFileOpen;
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persistentRecord->FileOpen.ClientId = clientId;
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persistentRecord->FileOpen.SessionNumber = sessionId;
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persistentRecord->FileOpen.Rfcb = rfcb;
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persistentRecord->FileOpen.PersistentFileId = rfcb->PagedRfcb->PersistentId;
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persistentRecord->FileOpen.FileMode = lfcb->FileMode;
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persistentRecord->FileOpen.JobId = lfcb->JobId;
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persistentRecord->FileOpen.FcbOpenCount = rfcb->PagedRfcb->FcbOpenCount;
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persistentRecord->FileOpen.Fid = rfcb->Fid;
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persistentRecord->FileOpen.Pid = rfcb->Pid;
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persistentRecord->FileOpen.Tid = rfcb->Tid;
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persistentRecord->FileOpen.GrantedAccess = rfcb->GrantedAccess;
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persistentRecord->FileOpen.ShareAccess = rfcb->ShareAccess;
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persistentRecord->FileOpen.OplockState = rfcb->OplockState;
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persistentRecord->FileOpen.CompatibilityOpen = mfcb->CompatibilityOpen;
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persistentRecord->FileOpen.OpenFileAttributes= mfcb->NonpagedMfcb->OpenFileAttributes;
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status = SrvIssueQueryUsnInfoRequest( rfcb,
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FALSE,
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&persistentRecord->FileOpen.UsnValue,
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&persistentRecord->FileOpen.FileReferenceNumber );
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//
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// Save off the current state of the workcontext within the workcontext.
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//
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WorkContext->Parameters.MakePersistent.ResumeSmbStatus = SmbStatus;
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WorkContext->Parameters.MakePersistent.FspRestartRoutine = WorkContext->FspRestartRoutine;
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WorkContext->Parameters.MakePersistent.FsdRestartRoutine = WorkContext->FsdRestartRoutine;
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WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
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// WorkContext->FspRestartRoutine = SrvRestartWritePersistentOpen;
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||
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status = SrvPostPersistentRecord( WorkContext,
|
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persistentRecord,
|
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&transactionId
|
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);
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if (NT_SUCCESS(status)) {
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status = SrvFlushPersistentRecords( WorkContext, transactionId );
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if (NT_SUCCESS(status)) {
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return SmbStatusInProgress;
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} else {
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IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: failed to flush record, status 0x%lx\n", status ));
|
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}
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}
|
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} else {
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||
IF_DEBUG(PERSISTENT) {
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KdPrint(( "SrvPostPersistOpen: failed to post record, status 0x%lx\n", status ));
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||
}
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}
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WorkContext->FsdRestartRoutine = WorkContext->Parameters.MakePersistent.FsdRestartRoutine;
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WorkContext->FspRestartRoutine = WorkContext->Parameters.MakePersistent.FspRestartRoutine;
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// whoops, something didn't go right. clean up.
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SrvFreePersistentRecord( persistentRecord );
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return SmbStatus;
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} // SrvPostPersistentOpen
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|
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NTSTATUS
|
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SrvPersistSession(
|
||
IN PWORK_CONTEXT WorkContext,
|
||
PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
|
||
ULONG *SessionId,
|
||
ULONG *ClientId
|
||
)
|
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{
|
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PPERSISTENT_RECORD_LIST_ENTRY persistentRecord = NULL;
|
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ULONG sessionId;
|
||
NTSTATUS status;
|
||
PSESSION session = WorkContext->Session;
|
||
PCONNECTION connection = WorkContext->Connection;
|
||
BOOLEAN createRecord = FALSE;
|
||
PAGED_CODE( );
|
||
|
||
ASSERT(session != NULL);
|
||
ASSERT(session->PersistentId != 0);
|
||
|
||
if (session->PersistentState == PersistentStateFreed) {
|
||
|
||
ACQUIRE_LOCK( &connection->Lock );
|
||
|
||
if (session->PersistentState == PersistentStateFreed) {
|
||
|
||
session->PersistentState = PersistentStateActive;
|
||
createRecord = TRUE;
|
||
}
|
||
RELEASE_LOCK( &connection->Lock );
|
||
}
|
||
|
||
//
|
||
// if there's not already a record for this session, create one now
|
||
//
|
||
|
||
if (createRecord) {
|
||
|
||
persistentRecord = SrvGetPersistentRecord( WorkContext );
|
||
|
||
if (persistentRecord == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistSession: Unable to allocate record for 0x%lx\n", WorkContext ));
|
||
}
|
||
status = STATUS_INSUFF_SERVER_RESOURCES;
|
||
goto exitPersistSession;
|
||
}
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistSession: persistent sess 0x%lx, record 0x%lx\n",
|
||
session, persistentRecord ));
|
||
}
|
||
|
||
status = SrvPersistConnection( WorkContext,
|
||
PersistentState,
|
||
ClientId
|
||
);
|
||
|
||
if (!NT_SUCCESS(status)) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistSession: failed to persist conn, status 0x%lx\n", status ));
|
||
}
|
||
goto exitPersistSession;
|
||
}
|
||
|
||
//
|
||
// now setup the persistent record as it should exist on disk for this
|
||
// file open.
|
||
//
|
||
|
||
persistentRecord->PersistState = PersistentStateActive;
|
||
persistentRecord->PersistOperation = PersistentSession;
|
||
|
||
persistentRecord->Session.ClientId = *ClientId;
|
||
persistentRecord->Session.Session = session;
|
||
|
||
persistentRecord->Session.SessionNumber = session->PersistentId;
|
||
persistentRecord->Session.Uid = session->Uid;
|
||
|
||
persistentRecord->Session.CreateTime.QuadPart = session->StartTime.QuadPart;
|
||
|
||
persistentRecord->Session.LogOffTime.QuadPart = session->LogOffTime.QuadPart;
|
||
persistentRecord->Session.KickOffTime.QuadPart = session->KickOffTime.QuadPart;
|
||
|
||
|
||
//
|
||
// now we add this record onto the list of pending state file updates.
|
||
//
|
||
|
||
InsertTailList( &PersistentState->PendingListEntry,
|
||
&persistentRecord->PendingListEntry );
|
||
|
||
// now it's time to copy the user's name and domain name to the
|
||
// entries going out to the state file.
|
||
|
||
{
|
||
ULONG totalLength;
|
||
ULONG lengthNameCopiedSoFar = 0;
|
||
ULONG lengthCopiedSoFar = 0;
|
||
|
||
totalLength = session->NtUserName.Length +
|
||
session->NtUserDomain.Length +
|
||
sizeof(WCHAR) ;
|
||
|
||
while (lengthCopiedSoFar < totalLength) {
|
||
|
||
PPERSISTENT_RECORD_LIST_ENTRY persistentName;
|
||
ULONG bufferRemaining;
|
||
PWCHAR nextAvailable;
|
||
|
||
persistentName = SrvGetPersistentRecord( WorkContext );
|
||
|
||
if (persistentName == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistSession: Unable to allocate name record for 0x%lx\n", WorkContext ));
|
||
}
|
||
status = STATUS_INSUFF_SERVER_RESOURCES;
|
||
goto exitPersistSession;
|
||
}
|
||
|
||
persistentName->PersistState = PersistentStateActive;
|
||
persistentName->PersistOperation = PersistentUserName;
|
||
|
||
persistentName->UserName.ContinuationRecord = (ULONG) -1;
|
||
|
||
persistentName->UserName.RecordLength = totalLength - lengthCopiedSoFar;
|
||
|
||
if (persistentName->UserName.RecordLength > PERSISTENT_USER_NAME_BUFFER_LENGTH) {
|
||
|
||
persistentName->UserName.RecordLength = PERSISTENT_USER_NAME_BUFFER_LENGTH;
|
||
}
|
||
|
||
bufferRemaining = persistentName->UserName.RecordLength;
|
||
nextAvailable = (WCHAR *) &(persistentName->UserName.Buffer[0]);
|
||
|
||
//
|
||
// first we copy in the user's domain name
|
||
//
|
||
|
||
if (lengthCopiedSoFar < session->NtUserDomain.Length) {
|
||
|
||
ULONG bytesToCopy = session->NtUserDomain.Length - lengthCopiedSoFar;
|
||
|
||
if (bytesToCopy > PERSISTENT_USER_NAME_BUFFER_LENGTH) {
|
||
|
||
bytesToCopy = PERSISTENT_USER_NAME_BUFFER_LENGTH;
|
||
}
|
||
|
||
RtlCopyMemory( nextAvailable,
|
||
session->NtUserDomain.Buffer +
|
||
( lengthCopiedSoFar / sizeof(WCHAR) ),
|
||
bytesToCopy );
|
||
|
||
nextAvailable += bytesToCopy / sizeof(WCHAR);
|
||
bufferRemaining -= bytesToCopy;
|
||
lengthCopiedSoFar += bytesToCopy;
|
||
}
|
||
|
||
//
|
||
// we separate the domain name and user name with a backslash
|
||
//
|
||
|
||
if (lengthCopiedSoFar == session->NtUserDomain.Length &&
|
||
bufferRemaining > 0) {
|
||
|
||
bufferRemaining -= sizeof(WCHAR);
|
||
*nextAvailable = L'\\';
|
||
nextAvailable++;
|
||
lengthCopiedSoFar += sizeof(WCHAR);
|
||
}
|
||
|
||
//
|
||
// lastly we copy in the user's user name
|
||
//
|
||
|
||
if (lengthNameCopiedSoFar < session->NtUserName.Length &&
|
||
bufferRemaining > 0) {
|
||
|
||
ULONG bytesToCopy = session->NtUserName.Length - lengthNameCopiedSoFar;
|
||
|
||
if (bytesToCopy > PERSISTENT_USER_NAME_BUFFER_LENGTH) {
|
||
|
||
bytesToCopy = PERSISTENT_USER_NAME_BUFFER_LENGTH;
|
||
}
|
||
|
||
RtlCopyMemory( nextAvailable,
|
||
session->NtUserName.Buffer +
|
||
( lengthNameCopiedSoFar / sizeof(WCHAR) ),
|
||
bytesToCopy );
|
||
|
||
lengthNameCopiedSoFar += bytesToCopy;
|
||
lengthCopiedSoFar += bytesToCopy;
|
||
}
|
||
|
||
InsertTailList( &PersistentState->PendingListEntry,
|
||
&persistentName->PendingListEntry );
|
||
}
|
||
}
|
||
}
|
||
|
||
*SessionId = session->PersistentId;
|
||
*ClientId = connection->PagedConnection->PersistentId;
|
||
status = STATUS_SUCCESS;
|
||
|
||
exitPersistSession:
|
||
|
||
if (status != STATUS_SUCCESS) {
|
||
|
||
// whoops, something didn't go right. clean up.
|
||
|
||
*SessionId = 0;
|
||
*ClientId = 0;
|
||
}
|
||
return status;
|
||
}
|
||
|
||
NTSTATUS
|
||
SrvPersistConnection(
|
||
IN PWORK_CONTEXT WorkContext,
|
||
PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
|
||
ULONG *ClientId
|
||
)
|
||
{
|
||
PPERSISTENT_RECORD_LIST_ENTRY persistentRecord = NULL;
|
||
ULONG clientId;
|
||
NTSTATUS status;
|
||
PCONNECTION connection = WorkContext->Connection;
|
||
BOOLEAN createRecord = FALSE;
|
||
|
||
PAGED_CODE( );
|
||
|
||
ASSERT(connection != NULL);
|
||
|
||
if (connection->PagedConnection->PersistentId == 0) {
|
||
|
||
ACQUIRE_LOCK( &connection->Lock );
|
||
|
||
if (connection->PagedConnection->PersistentId == 0) {
|
||
|
||
LONG uniqueId = 0;
|
||
|
||
while (uniqueId == 0) {
|
||
uniqueId = InterlockedIncrement( &SrvGlobalPersistentSessionId );
|
||
}
|
||
|
||
connection->PagedConnection->PersistentId = uniqueId;
|
||
connection->PagedConnection->PersistentState = PersistentStateActive;
|
||
createRecord = TRUE;
|
||
}
|
||
RELEASE_LOCK( &connection->Lock );
|
||
}
|
||
|
||
//
|
||
// if there's not already a record for this connection, create one now
|
||
//
|
||
|
||
if (createRecord) {
|
||
|
||
persistentRecord = SrvGetPersistentRecord( WorkContext );
|
||
|
||
if (persistentRecord == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistConnection: Unable to allocate record for 0x%lx\n", WorkContext ));
|
||
}
|
||
status = STATUS_INSUFF_SERVER_RESOURCES;
|
||
goto exitPersistConnection;
|
||
}
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPersistConnection: persistent conn 0x%lx, record 0x%lx\n",
|
||
connection, persistentRecord ));
|
||
}
|
||
|
||
//
|
||
// now setup the persistent record as it should exist on disk for this
|
||
// file open.
|
||
//
|
||
|
||
persistentRecord->PersistState = PersistentStateActive;
|
||
persistentRecord->PersistOperation = PersistentConnection;
|
||
|
||
persistentRecord->Connection.ClientId = *ClientId;
|
||
persistentRecord->Connection.Connection = connection;
|
||
|
||
persistentRecord->Connection.DirectHostIpx = connection->DirectHostIpx;
|
||
|
||
RtlCopyMemory( persistentRecord->Connection.OemClientMachineName,
|
||
connection->OemClientMachineName,
|
||
COMPUTER_NAME_LENGTH+1
|
||
);
|
||
|
||
if (connection->DirectHostIpx) {
|
||
|
||
RtlCopyMemory( &persistentRecord->Connection.IpxAddress,
|
||
&connection->IpxAddress,
|
||
sizeof( TDI_ADDRESS_IPX )
|
||
);
|
||
} else {
|
||
|
||
persistentRecord->Connection.ClientIPAddress = connection->ClientIPAddress;
|
||
}
|
||
|
||
InsertTailList( &PersistentState->PendingListEntry,
|
||
&persistentRecord->PendingListEntry );
|
||
}
|
||
|
||
*ClientId = connection->PagedConnection->PersistentId;
|
||
return STATUS_SUCCESS;
|
||
|
||
exitPersistConnection:
|
||
// whoops, something didn't go right. clean up.
|
||
|
||
*ClientId = 0;
|
||
|
||
if (persistentRecord) {
|
||
SrvFreePersistentRecord( persistentRecord );
|
||
}
|
||
|
||
return status;
|
||
}
|
||
|
||
PPERSISTENT_RECORD_LIST_ENTRY
|
||
SrvGetPersistentRecord (
|
||
IN PWORK_CONTEXT WorkContext
|
||
)
|
||
//
|
||
// This allocates persistent state buffers that we write out to the persistent
|
||
// state file. Free them with SrvFreePersistentRecord.
|
||
//
|
||
{
|
||
PPERSISTENT_RECORD_LIST_ENTRY record;
|
||
|
||
PAGED_CODE( );
|
||
|
||
record = ALLOCATE_HEAP( sizeof( PERSISTENT_RECORD_LIST_ENTRY ), BlockTypePersistentState );
|
||
|
||
if (record == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: failed to alloc record for wc= 0x%lx\n", WorkContext ));
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
RtlZeroMemory( record, sizeof( PERSISTENT_RECORD_LIST_ENTRY ));
|
||
|
||
InitializeListHead( &record->PendingListEntry );
|
||
record->FileOffset = (ULONG) -1;
|
||
record->FlushState = FlushStateNotPosted;
|
||
record->WorkContext = WorkContext;
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: allocated record at 0x%x for wc= 0x%lx\n", record, WorkContext ));
|
||
}
|
||
|
||
return record;
|
||
}
|
||
|
||
VOID
|
||
SrvFreePersistentRecord (
|
||
PPERSISTENT_RECORD_LIST_ENTRY Record
|
||
)
|
||
{
|
||
PPERSISTENT_RECORD_LIST_ENTRY subRecord;
|
||
PLIST_ENTRY listEntry = Record->PendingListEntry.Flink;
|
||
|
||
PAGED_CODE( );
|
||
|
||
while (listEntry != &Record->PendingListEntry) {
|
||
|
||
subRecord = CONTAINING_RECORD( listEntry, PERSISTENT_RECORD_LIST_ENTRY, PendingListEntry );
|
||
|
||
listEntry = listEntry->Flink;
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: freed record (1) at 0x%x\n", subRecord ));
|
||
}
|
||
|
||
FREE_HEAP( subRecord );
|
||
}
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: freed record (2) at 0x%x\n", Record ));
|
||
}
|
||
|
||
FREE_HEAP( Record );
|
||
return;
|
||
}
|
||
|
||
NTSTATUS
|
||
SrvPostPersistentRecord (
|
||
IN PWORK_CONTEXT WorkContext,
|
||
IN PPERSISTENT_RECORD_LIST_ENTRY PersistentState,
|
||
OUT PULONG TransactionId
|
||
)
|
||
{
|
||
PPERSISTENT_RECORD_LIST_ENTRY record;
|
||
ULONG numberRecordsRequired = 1;
|
||
PLIST_ENTRY listEntry;
|
||
PSHARE share = WorkContext->Share;
|
||
PPERSISTENT_SHARE_INFO shareInfo;
|
||
NTSTATUS status;
|
||
ULONG bitMapIndex;
|
||
PPERSISTENT_RECORD_LIST_ENTRY firstUserNameRecord = NULL;
|
||
PPERSISTENT_RECORD_LIST_ENTRY lastUserNameRecord = NULL;
|
||
PPERSISTENT_RECORD_LIST_ENTRY sessionRecord = NULL;
|
||
|
||
PAGED_CODE( );
|
||
|
||
if (share == NULL) {
|
||
|
||
ASSERT(WorkContext->Rfcb != NULL);
|
||
share = WorkContext->Rfcb->Lfcb->TreeConnect->Share;
|
||
}
|
||
|
||
ASSERT(share != NULL);
|
||
|
||
//
|
||
// determine how many records we need to write.
|
||
//
|
||
|
||
listEntry = PersistentState->PendingListEntry.Flink;
|
||
|
||
while (listEntry != &PersistentState->PendingListEntry) {
|
||
|
||
record = CONTAINING_RECORD( listEntry, PERSISTENT_RECORD_LIST_ENTRY, PendingListEntry );
|
||
|
||
if (record->FileOffset == (ULONG) -1) {
|
||
|
||
numberRecordsRequired++;
|
||
}
|
||
listEntry = listEntry->Flink;
|
||
}
|
||
|
||
//
|
||
// if the persistent state file on the share isn't set up, do so now.
|
||
//
|
||
|
||
if (share->PersistentStateFile == NULL) {
|
||
|
||
status = SrvSetupPersistentShare( share, FALSE );
|
||
|
||
if (! NT_SUCCESS(status)) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvPostPersistentRecord: error 0x%x for share 0x%x\n", status, share ));
|
||
}
|
||
|
||
// need to log an error here
|
||
|
||
share->PersistentState = PersistentStateInError;
|
||
return status;
|
||
}
|
||
|
||
ASSERT( share->PersistentStateFile );
|
||
}
|
||
|
||
shareInfo = (PPERSISTENT_SHARE_INFO) (share->PersistentStateFile);
|
||
|
||
//
|
||
// if the bitmap is too small, try to double it's size.
|
||
//
|
||
|
||
ACQUIRE_LOCK( &shareInfo->Lock );
|
||
|
||
if (shareInfo->FreeEntries <= numberRecordsRequired) {
|
||
|
||
PULONG newBuffer;
|
||
ULONG newSize;
|
||
ULONG newBits;
|
||
|
||
//
|
||
// looks like our bitmap isn't big enough, let's expand it by two
|
||
//
|
||
|
||
if (shareInfo->BitMap.SizeOfBitMap == 0) {
|
||
newSize = INITIAL_BITMAP_LENGTH;
|
||
} else {
|
||
newSize = shareInfo->BitMap.SizeOfBitMap * 2;
|
||
}
|
||
|
||
newBuffer = ALLOCATE_HEAP( newSize, BlockTypePersistentBitMap );
|
||
|
||
if (newBuffer == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: failed to alloc record for wc= 0x%lx\n", WorkContext ));
|
||
}
|
||
RELEASE_LOCK( &shareInfo->Lock );
|
||
return STATUS_INSUFF_SERVER_RESOURCES;
|
||
}
|
||
|
||
// optimize by only zeroing the second half of bitmap before copy.
|
||
|
||
RtlZeroMemory( newBuffer, newSize );
|
||
|
||
if (shareInfo->BitMap.Buffer != NULL) {
|
||
|
||
RtlCopyMemory( newBuffer,
|
||
shareInfo->BitMap.Buffer,
|
||
shareInfo->BitMap.SizeOfBitMap
|
||
);
|
||
FREE_HEAP( shareInfo->BitMap.Buffer );
|
||
|
||
newBits = ( newSize - shareInfo->BitMap.SizeOfBitMap ) * 8;
|
||
shareInfo->BitMap.Buffer = newBuffer;
|
||
shareInfo->BitMap.SizeOfBitMap = newSize;
|
||
|
||
} else {
|
||
|
||
newBits = newSize * 8;
|
||
RtlInitializeBitMap( &shareInfo->BitMap, newBuffer, newSize );
|
||
}
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: new bitmap 0x%x for share 0x%lx\n",
|
||
newBuffer, share ));
|
||
}
|
||
|
||
shareInfo->FreeEntries += newBits;
|
||
shareInfo->TotalEntries += newBits;
|
||
}
|
||
|
||
//
|
||
// for each record we need to post, find a slot in the bitmap and map it
|
||
// to a file index
|
||
//
|
||
|
||
listEntry = &PersistentState->PendingListEntry; // start at the head of the
|
||
// list which is on the first entry
|
||
|
||
while (numberRecordsRequired > 0) {
|
||
|
||
ULONG numberEntries = numberRecordsRequired;
|
||
|
||
bitMapIndex = (ULONG) -1;
|
||
|
||
while (bitMapIndex == (ULONG) -1) {
|
||
|
||
bitMapIndex = RtlFindClearBitsAndSet( &shareInfo->BitMap,
|
||
numberEntries,
|
||
shareInfo->HintIndex );
|
||
|
||
if (bitMapIndex == (ULONG) -1) {
|
||
|
||
numberEntries = RtlFindLongestRunClear( &shareInfo->BitMap,
|
||
&shareInfo->HintIndex );
|
||
|
||
if (numberEntries == 0 || numberEntries == (ULONG) -1) {
|
||
|
||
shareInfo->FreeEntries = 0;
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvGetPersistentRecord: bitmap is full for share 0x%lx\n", share ));
|
||
}
|
||
RELEASE_LOCK( &shareInfo->Lock );
|
||
return STATUS_INSUFF_SERVER_RESOURCES;
|
||
}
|
||
} else {
|
||
shareInfo->HintIndex = bitMapIndex;
|
||
}
|
||
}
|
||
|
||
numberRecordsRequired -= numberEntries;
|
||
|
||
while (numberEntries > 0) {
|
||
|
||
record = CONTAINING_RECORD( listEntry, PERSISTENT_RECORD_LIST_ENTRY, PendingListEntry );
|
||
|
||
if (record->FileOffset == (ULONG) -1) {
|
||
|
||
record->FileOffset = BITMAP_TO_STATE_FILE_INDEX( shareInfo, bitMapIndex );
|
||
}
|
||
record->PersistIndex = record->FileOffset;
|
||
|
||
//
|
||
// track the file indexes in records that need to refer to
|
||
// other records.
|
||
//
|
||
|
||
if (record->PersistOperation == PersistentSession) {
|
||
|
||
sessionRecord = record;
|
||
|
||
} else if (record->PersistOperation == PersistentUserName) {
|
||
|
||
//
|
||
// chain up the user name records into a list
|
||
//
|
||
|
||
if (firstUserNameRecord == NULL) {
|
||
|
||
firstUserNameRecord = record;
|
||
|
||
} else {
|
||
|
||
lastUserNameRecord->UserName.ContinuationRecord = record->FileOffset;
|
||
}
|
||
lastUserNameRecord = record;
|
||
}
|
||
|
||
//
|
||
// on to next concurrent record, reduce number remaining, etc
|
||
//
|
||
|
||
bitMapIndex++;
|
||
numberEntries--;
|
||
listEntry = listEntry->Flink;
|
||
}
|
||
}
|
||
|
||
//
|
||
// fix up the file indexes in records that need to refer to other records
|
||
//
|
||
|
||
if (sessionRecord != NULL) {
|
||
|
||
sessionRecord->Session.UserNameRecord = (firstUserNameRecord != NULL) ?
|
||
firstUserNameRecord->FileOffset : (ULONG) -1;
|
||
}
|
||
|
||
//
|
||
// with the records now well formed, complete them by calculating the CRC
|
||
// values and putting them on the pending write list for the share.
|
||
//
|
||
// this is a do..while since we need to be sure to pick up the first record
|
||
// which is also the head of the list.
|
||
|
||
listEntry = &PersistentState->PendingListEntry;
|
||
|
||
do {
|
||
record = CONTAINING_RECORD( listEntry, PERSISTENT_RECORD_LIST_ENTRY, PendingListEntry );
|
||
|
||
// Warning :
|
||
// We calculate the CRC on the rest of the record excluding the CRC
|
||
// value itself. If the CRC value is not stored in the first dword,
|
||
// this breaks!
|
||
//
|
||
record->PersistConsistencyCheck = Crc32(
|
||
sizeof( PERSISTENT_RECORD_LIST_ENTRY ) - sizeof(ULONG),
|
||
(PUCHAR)((PUCHAR)record+sizeof(ULONG)) );
|
||
|
||
listEntry = listEntry->Flink;
|
||
|
||
//
|
||
// we can add it to the updatesPending list without removing it
|
||
// from the linked list it's in because we're destroying the list
|
||
// safely as we traverse it.
|
||
//
|
||
InsertTailList( &shareInfo->UpdatesPendingList,
|
||
&record->PendingListEntry );
|
||
|
||
} while (listEntry != &PersistentState->PendingListEntry);
|
||
|
||
*TransactionId = ++(shareInfo->LastIdAccepted);
|
||
RELEASE_LOCK( &shareInfo->Lock );
|
||
|
||
return STATUS_SUCCESS;
|
||
}
|
||
|
||
NTSTATUS
|
||
SrvFlushPersistentRecords (
|
||
IN PWORK_CONTEXT WorkContext,
|
||
IN ULONG TransactionId
|
||
)
|
||
{
|
||
|
||
|
||
|
||
return STATUS_INSUFF_SERVER_RESOURCES;
|
||
}
|
||
|
||
NTSTATUS
|
||
SrvSetupPersistentShare (
|
||
IN OUT PSHARE Share,
|
||
IN BOOLEAN Restore
|
||
)
|
||
{
|
||
ULONG bytesRequired;
|
||
PPERSISTENT_SHARE_INFO shareInfo;
|
||
PWCHAR destString;
|
||
HANDLE h;
|
||
NTSTATUS status;
|
||
OBJECT_ATTRIBUTES objectAttributes;
|
||
IO_STATUS_BLOCK iosb;
|
||
LARGE_INTEGER allocationSize;
|
||
|
||
PAGED_CODE( );
|
||
|
||
ACQUIRE_LOCK( &SrvShareLock );
|
||
|
||
if ( ! Share->AllowPersistentHandles ) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvSetupPersistentShare: share %ws not configured for persistent handles\n", Share->ShareName.Buffer ));
|
||
}
|
||
RELEASE_LOCK( &SrvShareLock );
|
||
return STATUS_INVALID_SERVER_STATE;
|
||
}
|
||
|
||
if ( Share->PersistentStateFile != NULL ) {
|
||
|
||
RELEASE_LOCK( &SrvShareLock );
|
||
return STATUS_SUCCESS;
|
||
}
|
||
|
||
bytesRequired = sizeof( PERSISTENT_SHARE_INFO ) + sizeof( WCHAR ) +
|
||
Share->NtPathName.Length + sizeof( WCHAR ) +
|
||
Share->ShareName.Length + sizeof( WCHAR );
|
||
|
||
shareInfo = ALLOCATE_HEAP( bytesRequired, BlockTypePersistShareState );
|
||
|
||
if (shareInfo == NULL) {
|
||
|
||
IF_DEBUG(PERSISTENT) {
|
||
KdPrint(( "SrvSetupPersistentShare: failed to alloc block for share %ws\n", Share->ShareName.Buffer ));
|
||
}
|
||
RELEASE_LOCK( &SrvShareLock );
|
||
return STATUS_INSUFF_SERVER_RESOURCES;
|
||
}
|
||
|
||
RtlZeroMemory( shareInfo, bytesRequired );
|
||
|
||
shareInfo->Share = Share;
|
||
InitializeListHead( &shareInfo->UpdatesPendingList );
|
||
|
||
shareInfo->LastIdAccepted = 1;
|
||
shareInfo->LastIdCommitted = 1;
|
||
shareInfo->FirstRecord = sizeof( PERSISTENT_FILE_HEADER );
|
||
|
||
INITIALIZE_LOCK( &shareInfo->Lock, SHARE_LOCK_LEVEL, "PersistentShareLock" );
|
||
|
||
destString = &shareInfo->NameBuffer[0];
|
||
|
||
RtlCopyMemory( destString,
|
||
Share->NtPathName.Buffer,
|
||
Share->NtPathName.Length
|
||
);
|
||
destString += (Share->NtPathName.Length / sizeof(WCHAR));
|
||
|
||
*destString = L':'; // form up stream name
|
||
destString++;
|
||
*destString = L'$';
|
||
destString++;
|
||
|
||
RtlCopyMemory( destString,
|
||
Share->ShareName.Buffer,
|
||
Share->ShareName.Length
|
||
);
|
||
destString += (Share->ShareName.Length / sizeof(WCHAR));
|
||
|
||
*destString = L'\0';
|
||
|
||
RtlInitUnicodeString( &shareInfo->StateFileName,
|
||
&shareInfo->NameBuffer[0] );
|
||
|
||
Share->PersistentStateFile = shareInfo;
|
||
Share->PersistentState = PersistentStateActive;
|
||
|
||
RELEASE_LOCK( &SrvShareLock );
|
||
|
||
SrvInitializeObjectAttributes_U(
|
||
&objectAttributes,
|
||
&shareInfo->StateFileName,
|
||
OBJ_CASE_INSENSITIVE,
|
||
NULL,
|
||
NULL
|
||
);
|
||
|
||
allocationSize.QuadPart = shareInfo->FirstRecord +
|
||
( INITIAL_BITMAP_LENGTH * sizeof( PERSISTENT_RECORD ) );
|
||
|
||
status = IoCreateFile( &h,
|
||
GENERIC_READ | GENERIC_WRITE,
|
||
&objectAttributes,
|
||
&iosb,
|
||
&allocationSize,
|
||
0,
|
||
0, // no sharing for this file
|
||
FILE_OPEN_IF,
|
||
FILE_NO_COMPRESSION,
|
||
NULL,
|
||
0,
|
||
CreateFileTypeNone,
|
||
NULL,
|
||
0 );
|
||
|
||
if ( NT_SUCCESS( status ) ) {
|
||
status = iosb.Status;
|
||
}
|
||
if ( NT_SUCCESS( status ) ) {
|
||
|
||
shareInfo->FileHandle = h;
|
||
|
||
if (Restore) {
|
||
|
||
// restore settings from file here.
|
||
|
||
}
|
||
|
||
// write out the header record
|
||
|
||
|
||
} else {
|
||
|
||
//
|
||
// the create failed. hmmm. looks like we can't support persistent
|
||
// handles on this share.
|
||
//
|
||
|
||
Share->PersistentState = PersistentStateInError;
|
||
}
|
||
return status;
|
||
}
|
||
|
||
NTSTATUS
|
||
SrvClosePersistentShare (
|
||
IN OUT PSHARE Share,
|
||
IN BOOLEAN ClearState
|
||
)
|
||
{
|
||
|
||
PAGED_CODE( );
|
||
|
||
|
||
return 0;
|
||
}
|
||
|
||
//
|
||
// This code comes from Dr. Dobbs Journal, May 1992
|
||
//
|
||
|
||
unsigned long SrvCRCTable[256] = {
|
||
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
|
||
0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
|
||
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
|
||
0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
|
||
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
|
||
0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
|
||
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
|
||
0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
|
||
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
|
||
0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
|
||
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
|
||
0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
|
||
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
|
||
0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
|
||
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
|
||
0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
|
||
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
|
||
0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
|
||
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
|
||
0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
|
||
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
|
||
0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
|
||
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
|
||
0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
|
||
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
|
||
0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
|
||
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
|
||
0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
|
||
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
|
||
0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
|
||
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
|
||
0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
|
||
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
|
||
0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
|
||
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
|
||
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
|
||
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
|
||
0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
|
||
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
|
||
0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
|
||
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
|
||
0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
|
||
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D };
|
||
|
||
//
|
||
// Since we never need to have a "rolling crc" across records, we have
|
||
// simplified the crc routine abit by always assuming the starting CRC is
|
||
// -1 and we return the crc value rather than stuff it into passed arguement.
|
||
//
|
||
|
||
unsigned long
|
||
Crc32(
|
||
IN unsigned long cbBuffer,
|
||
IN unsigned char *pbBuffer
|
||
)
|
||
{
|
||
unsigned long dwCrc = (unsigned long) -1;
|
||
|
||
PAGED_CODE( );
|
||
|
||
while (cbBuffer-- != 0)
|
||
{
|
||
dwCrc = (dwCrc >> 8) ^ SrvCRCTable[(unsigned char) dwCrc ^ *pbBuffer++];
|
||
}
|
||
return dwCrc;
|
||
}
|
||
|
||
#if 0
|
||
|
||
// here's the original, in case anyone needs to refer to it.
|
||
|
||
VOID
|
||
Crc32( unsigned long dwCrc,
|
||
unsigned long cbBuffer,
|
||
LPVOID pvBuffer,
|
||
unsigned long *pNewCrc)
|
||
{
|
||
unsigned char * pbBuffer = (unsigned char *) pvBuffer;
|
||
|
||
while (cbBuffer-- != 0)
|
||
{
|
||
dwCrc = (dwCrc >> 8) ^ SrvCRCTable[(unsigned char) dwCrc ^ *pbBuffer++];
|
||
}
|
||
*pNewCrc = dwCrc;
|
||
}
|
||
#endif
|
||
|
||
#endif // def INCLUDE_SMB_PERSISTENT
|
||
|