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99 lines
4.3 KiB
C#
99 lines
4.3 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : SMC.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : SCSI Media-changer Commands.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Contains SCSI commands defined in SMC standards.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using Aaru.Logging;
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namespace Aaru.Devices;
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public partial class Device
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{
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/// <summary>Reads an attribute from the medium auxiliary memory, or reports which elements in the changer contain one</summary>
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/// <param name="buffer">Buffer.</param>
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/// <param name="senseBuffer">Sense buffer.</param>
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/// <param name="action">What to do, <see cref="ScsiAttributeAction" />.</param>
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/// <param name="element">Element address.</param>
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/// <param name="elementType">Element type.</param>
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/// <param name="volume">Volume number.</param>
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/// <param name="partition">Partition number.</param>
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/// <param name="firstAttribute">First attribute identificator.</param>
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/// <param name="cache">If set to <c>true</c> device can return cached data.</param>
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/// <param name="timeout">Timeout.</param>
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/// <param name="duration">Duration.</param>
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public bool ReadAttribute(out byte[] buffer, out ReadOnlySpan<byte> senseBuffer, ScsiAttributeAction action,
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ushort element, byte elementType, byte volume, byte partition, ushort firstAttribute,
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bool cache, uint timeout, out double duration)
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{
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buffer = new byte[256];
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Span<byte> cdb = CdbBuffer[..16];
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cdb.Clear();
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senseBuffer = SenseBuffer;
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cdb[0] = (byte)ScsiCommands.ReadAttribute;
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cdb[1] = (byte)((byte)action & 0x1F);
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cdb[2] = (byte)((element & 0xFF00) >> 8);
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cdb[3] = (byte)(element & 0xFF);
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cdb[4] = (byte)(elementType & 0x0F);
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cdb[5] = volume;
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cdb[7] = partition;
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cdb[8] = (byte)((firstAttribute & 0xFF00) >> 8);
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cdb[9] = (byte)(firstAttribute & 0xFF);
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cdb[10] = (byte)((buffer.Length & 0xFF000000) >> 24);
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cdb[11] = (byte)((buffer.Length & 0xFF0000) >> 16);
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cdb[12] = (byte)((buffer.Length & 0xFF00) >> 8);
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cdb[13] = (byte)(buffer.Length & 0xFF);
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if(cache) cdb[14] += 0x01;
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LastError = SendScsiCommand(cdb, ref buffer, timeout, ScsiDirection.In, out duration, out bool sense);
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Error = LastError != 0;
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if(sense) return true;
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var attrLen = (uint)((buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] + 4);
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buffer = new byte[attrLen];
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cdb[10] = (byte)((buffer.Length & 0xFF000000) >> 24);
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cdb[11] = (byte)((buffer.Length & 0xFF0000) >> 16);
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cdb[12] = (byte)((buffer.Length & 0xFF00) >> 8);
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cdb[13] = (byte)(buffer.Length & 0xFF);
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senseBuffer = SenseBuffer;
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LastError = SendScsiCommand(cdb, ref buffer, timeout, ScsiDirection.In, out duration, out sense);
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Error = LastError != 0;
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AaruLogging.Debug(SCSI_MODULE_NAME, Localization.READ_ATTRIBUTE_took_0_ms, duration);
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return sense;
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}
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} |