97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
// KDiskDevice.h
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#ifndef _K_DISK_DEVICE_H
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#define _K_DISK_DEVICE_H
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#include <OS.h>
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#include "KPhysicalPartition.h"
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#include "RWLocker.h"
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namespace BPrivate {
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namespace DiskDevice {
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class UserDataWriter;
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class KDiskDevice : public KPhysicalPartition {
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public:
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KDiskDevice(partition_id id = -1);
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virtual ~KDiskDevice();
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status_t SetTo(const char *path);
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void Unset();
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virtual status_t InitCheck() const;
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// TODO: probably superfluous
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// A read lock owner can be sure that the device (incl. all of its
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// partitions won't be changed).
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// A write lock owner is moreover allowed to make changes.
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// The hierarchy is additionally protected by the disk device manager's
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// lock -- only a device write lock owner is allowed to change it, but
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// manager lock owners can be sure, that it won't change.
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bool ReadLock();
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void ReadUnlock();
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bool IsReadLocked(bool orWriteLocked = true);
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bool WriteLock();
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void WriteUnlock();
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bool IsWriteLocked();
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virtual bool PrepareForRemoval();
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virtual void SetID(partition_id id);
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virtual status_t PublishDevice();
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virtual status_t UnpublishDevice();
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void SetDeviceFlags(uint32 flags); // comprises the ones below
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uint32 DeviceFlags() const;
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bool IsReadOnlyMedia() const;
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bool IsWriteOnce() const;
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bool IsRemovable() const;
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bool HasMedia() const;
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status_t SetPath(const char *path);
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// TODO: Remove this method or make it private. Once initialized the
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// path must not be changed.
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const char *Path() const;
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virtual status_t GetPath(char *path) const;
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// File descriptor: Set only from a kernel thread, valid only for
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// kernel threads.
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void SetFD(int fd);
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int FD() const;
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// access to C style device data
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disk_device_data *DeviceData();
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const disk_device_data *DeviceData() const;
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status_t CreateShadowDevice(team_id team);
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status_t DeleteShadowDevice();
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void SetShadowOwner(team_id team);
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team_id ShadowOwner() const;
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void WriteUserData(UserDataWriter &writer, bool shadow);
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virtual void Dump(bool deep = true, int32 level = 0);
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protected:
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virtual status_t GetMediaStatus(status_t *mediaStatus);
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virtual status_t GetGeometry(device_geometry *geometry);
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private:
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void _InitPartitionData();
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disk_device_data fDeviceData;
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RWLocker fLocker;
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int fFD;
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status_t fMediaStatus;
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team_id fShadowOwner;
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};
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} // namespace DiskDevice
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} // namespace BPrivate
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using BPrivate::DiskDevice::KDiskDevice;
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#endif // _K_DISK_DEVICE_H
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