mirror of https://github.com/akuker/RASCSI.git
71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator PiSCSI
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// for Raspberry Pi
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//
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// Copyright (C) 2022 Uwe Seimet
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//
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// The base class for all mass storage devices with image file support
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//
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//---------------------------------------------------------------------------
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#pragma once
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#include "mode_page_device.h"
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#include <unordered_map>
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#include <string>
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using namespace std;
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using id_set = pair<int, int>;
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class StorageDevice : public ModePageDevice
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{
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public:
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StorageDevice(PbDeviceType, int);
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~StorageDevice() override = default;
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virtual void Open() = 0;
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string GetFilename() const { return filename; }
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void SetFilename(string_view f) { filename = f; }
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uint64_t GetBlockCount() const { return blocks; }
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void ReserveFile(const string&, int, int) const;
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void UnreserveFile();
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static void UnreserveAll();
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static bool FileExists(const string&);
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bool IsReadOnlyFile() const;
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void SetMediumChanged(bool b) { medium_changed = b; }
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static unordered_map<string, id_set> GetReservedFiles() { return reserved_files; }
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static void SetReservedFiles(const unordered_map<string, id_set>& r) { reserved_files = r; }
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static id_set GetIdsForReservedFile(const string&);
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protected:
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void ValidateFile();
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bool IsMediumChanged() const { return medium_changed; }
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void SetBlockCount(uint64_t b) { blocks = b; }
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off_t GetFileSize() const;
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private:
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// Total number of blocks
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uint64_t blocks = 0;
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string filename;
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bool medium_changed = false;
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// The list of image files in use and the IDs and LUNs using these files
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static inline unordered_map<string, id_set> reserved_files;
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};
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