| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| SupportedVpdPages |
|
| 2.0;2 |
| 1 | package org.jscsi.target.scsi.inquiry; | |
| 2 | ||
| 3 | ||
| 4 | import java.nio.ByteBuffer; | |
| 5 | ||
| 6 | import org.jscsi.target.scsi.IResponseData; | |
| 7 | import org.jscsi.target.scsi.inquiry.PageCode.VitalProductDataPageName; | |
| 8 | ||
| 9 | ||
| 10 | /** | |
| 11 | * This Vital Product Data page contains a list of the VPD page codes supported by the logical unit. | |
| 12 | * <p> | |
| 13 | * This class uses the singleton pattern since the list of supported Vital Product Data page requests will never change. | |
| 14 | * | |
| 15 | * @author Andreas Ergenzinger | |
| 16 | */ | |
| 17 | public final class SupportedVpdPages implements IResponseData { | |
| 18 | ||
| 19 | /** | |
| 20 | * The total length of all fields that are not part of the Supported VPD page list. | |
| 21 | */ | |
| 22 | private static final int HEADER_SIZE = 4; | |
| 23 | ||
| 24 | /** | |
| 25 | * The singleton. | |
| 26 | */ | |
| 27 | private static SupportedVpdPages instance; | |
| 28 | ||
| 29 | /* | |
| 30 | * determine which pages to support must be in ascending order see PAGECode.VitalProductDataPageName | |
| 31 | */ | |
| 32 | 0 | public static final byte[] SUPPORTED_VPD_PAGES = new byte[] { (byte) 0x00,// SUPPORTED_VPD_PAGES, |
| 33 | // mandatory | |
| 34 | (byte) 0x83,// DECIVE_IDENTIFICATION, mandatory | |
| 35 | }; | |
| 36 | ||
| 37 | /** | |
| 38 | * Returns the singleton. | |
| 39 | * | |
| 40 | * @return the singleton | |
| 41 | */ | |
| 42 | public static SupportedVpdPages getInstance () { | |
| 43 | 0 | if (instance == null) instance = new SupportedVpdPages(); |
| 44 | 0 | return instance; |
| 45 | } | |
| 46 | ||
| 47 | 0 | private SupportedVpdPages () { |
| 48 | // private due to singleton pattern | |
| 49 | 0 | } |
| 50 | ||
| 51 | public void serialize (ByteBuffer byteBuffer, int index) { | |
| 52 | ||
| 53 | // *** byte 0 *** | |
| 54 | /* | |
| 55 | * Peripheral Qualifier (bits 7 - 5): 000b A peripheral device having the specified peripheral device type is | |
| 56 | * connected to this logical unit. If the device server is unable to determine whether or not a peripheral | |
| 57 | * device is connected, it also shall use this peripheral qualifier. This peripheral qualifier does not mean | |
| 58 | * that the peripheral device connected to the logical unit is ready for access. Peripheral Device Type (bits 4 | |
| 59 | * - 0): 00000b direct access block device | |
| 60 | */ | |
| 61 | 0 | byteBuffer.position(index); |
| 62 | 0 | byteBuffer.put((byte) 0); |
| 63 | ||
| 64 | // *** byte 1 *** | |
| 65 | /* | |
| 66 | * Page Code: 0x00 supported VPD pages | |
| 67 | */ | |
| 68 | 0 | byteBuffer.put((byte) 0); |
| 69 | ||
| 70 | // *** byte 2 *** | |
| 71 | // RESERVED | |
| 72 | 0 | byteBuffer.put((byte) 0); |
| 73 | ||
| 74 | // *** byte 3 *** | |
| 75 | /* | |
| 76 | * Page Length: n - 3 = 5 - 3 = 2 (for now) | |
| 77 | */ | |
| 78 | 0 | byteBuffer.put((byte) SUPPORTED_VPD_PAGES.length); |
| 79 | ||
| 80 | // *** bytes 4 and 5 - Supported VPD Pages *** | |
| 81 | 0 | for (int i = 0; i < SUPPORTED_VPD_PAGES.length; ++i) |
| 82 | 0 | byteBuffer.put(SUPPORTED_VPD_PAGES[i]); |
| 83 | 0 | } |
| 84 | ||
| 85 | public int size () { | |
| 86 | 0 | return HEADER_SIZE + SUPPORTED_VPD_PAGES.length; |
| 87 | } | |
| 88 | ||
| 89 | /** | |
| 90 | * Returns <code>true</code> for those and only for those VPD Page Codes which are supported by the jSCSI Target. | |
| 91 | * | |
| 92 | * @param vitalProductDataPageName VPD Page Name whose support is inquired | |
| 93 | * @return <code>true</code> for those and only for those VPD Page Codes which are supported by the jSCSI Target | |
| 94 | */ | |
| 95 | public static boolean vpdPageCodeSupported (final VitalProductDataPageName vitalProductDataPageName) { | |
| 96 | 0 | for (int i = 0; i < SUPPORTED_VPD_PAGES.length; ++i) { |
| 97 | 0 | PageCode pageCode = new PageCode(SUPPORTED_VPD_PAGES[i]); |
| 98 | 0 | if (pageCode.getVitalProductDataPageName() == vitalProductDataPageName) return true; |
| 99 | } | |
| 100 | 0 | return false; |
| 101 | } | |
| 102 | } |