Return to selvol.c CVS log

Up to [WindowsNT SDKs] / ntddk / src / scsi / qic117

Annotation of ntddk/src/scsi/qic117/selvol.c, revision 1.1.1.1

1.1       root        1: /*++
                      2: 
                      3: Copyright (c) 1993 - Colorado Memory Systems, Inc.
                      4: All Rights Reserved
                      5: 
                      6: Module Name:
                      7: 
                      8:     selvol.c
                      9: 
                     10: Abstract:
                     11: 
                     12:     Sets "state" to read an existing QIC-40/80 volume.
                     13: 
                     14: Revision History:
                     15: 
                     16: 
                     17: 
                     18: 
                     19: --*/
                     20: 
                     21: //
                     22: // include files
                     23: //
                     24: 
                     25: #include <ntddk.h>
                     26: #include <ntddtape.h>
                     27: #include "common.h"
                     28: #include "q117.h"
                     29: #include "protos.h"
                     30: 
                     31: 
                     32: STATUS
                     33: q117SelVol (
                     34:     PVOLUME_TABLE_ENTRY TheVolumeTable,
                     35:     PQ117_CONTEXT Context
                     36:     )
                     37: 
                     38: /*++
                     39: 
                     40: Routine Description:
                     41: 
                     42:     May be called from SelectVol() or StBk().  Decides how many tracks
                     43:     to read in to start a backup or restore.  Allocates memory for
                     44:     track buffers and redundancy data and IORequest structures through
                     45:     ArrangeMem().
                     46: 
                     47: Arguments:
                     48: 
                     49:     TheVolumeTable - the tape directory entry for this volume.
                     50: 
                     51:     Context -
                     52: 
                     53: Return Value:
                     54: 
                     55:     NoErr, any Driver error except BadBlk, RdncUnsc, <LinkRC>,
                     56:     <EndOfVol>, TapeFull.
                     57: 
                     58: --*/
                     59: 
                     60: {
                     61:     LONG ret = NoErr;
                     62: 
                     63:     //
                     64:     // set up global variables
                     65:     //
                     66:     Context->CurrentOperation.LastSegment = TheVolumeTable->EndingSegment;
                     67:     Context->CurrentOperation.CurrentSegment = TheVolumeTable->StartSegment;
                     68:     Context->CurrentOperation.LastSegmentRead = Context->CurrentOperation.CurrentSegment - 1;
                     69:     Context->CurrentOperation.BytesOnTape = TheVolumeTable->DataSize;
                     70:     Context->CurrentMark = 0;
                     71:     Context->CurrentOperation.BytesRead = 0;
                     72:     //
                     73:     // force a read of the first segment (if skipblock not called)
                     74:     //
                     75:     Context->CurrentOperation.SegmentBytesRemaining = 0;
                     76: 
                     77:     if (TheVolumeTable->SequenceNumber == 1) {
                     78:         Context->CurrentOperation.SegmentStatus = NoErr;
                     79:     }
                     80: 
                     81:     return(ret);
                     82: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.