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104 lines
1.8 KiB
104 lines
1.8 KiB
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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quorum.c
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Abstract:
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Implements quorum for cm, uses UNC file for now
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Author:
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Ahmed Mohamed (ahmedm) 12, 01, 2000
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Revision History:
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--*/
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#include <nt.h>
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#include <ntdef.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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//#include <winioctl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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// Quorum stuff
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static HANDLE DlmQhd = 0;
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static char *default_qfile="\\DosDevices\\UNC\\ahmedm\\tmp\\gs.qrm";
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extern char *WINAPI config_get_qfile();
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BOOLEAN
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QuormAcquire()
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{
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OBJECT_ATTRIBUTES objattrs;
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UNICODE_STRING cwspath;
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NTSTATUS status;
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IO_STATUS_BLOCK iostatus;
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WCHAR buf[128];
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int n;
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char *qfile;
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if (DlmQhd)
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return TRUE;
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qfile = config_get_qfile();
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if (!qfile) {
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qfile = default_qfile;
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}
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// no-quorum is specified
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if (qfile[0] == '\0')
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return TRUE;
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// convert to unicode
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n = MultiByteToWideChar(CP_ACP, 0, qfile, strlen(qfile), buf, sizeof(buf));
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buf[n] = buf[n+1] = '\0';
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RtlInitUnicodeString(&cwspath, buf);
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InitializeObjectAttributes(&objattrs, &cwspath, OBJ_CASE_INSENSITIVE,
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NULL, NULL);
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status = NtCreateFile(&DlmQhd,
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SYNCHRONIZE | DELETE,
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&objattrs,
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&iostatus,
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0,
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FILE_ATTRIBUTE_NORMAL,
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0,
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FILE_CREATE,
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FILE_DELETE_ON_CLOSE | FILE_NON_DIRECTORY_FILE,
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NULL,
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0);
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if (status != STATUS_SUCCESS) {
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if (status != STATUS_OBJECT_NAME_COLLISION) {
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printf("Quorm '%s' failed %x\n", qfile, status);
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}
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return FALSE;
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}
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return TRUE;
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}
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void
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QuormInit()
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{
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DlmQhd = 0;
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}
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void
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QuormRelease()
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{
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if (DlmQhd) {
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NtClose(DlmQhd);
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DlmQhd = 0;
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}
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}
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