_PHATVOL Struct Reference

Volume info structure. More...

#include <phatvol.h>

Collaboration diagram for _PHATVOL:

Data Fields
int	vol_type
	Type of volume.
uint32_t	vol_numfree
	Number of free clusters.
uint32_t	vol_nxtfree
	Possibly next free cluster.
PHATSECTBUF	vol_buf [1]
	Sector buffer of this volume.
HANDLE	vol_fsmutex
	Mutual exclusion filesystem access semaphore.
HANDLE	vol_iomutex
	Mutual exclusion I/O semaphore.
unsigned int	vol_sectsz
	Bytes per sector.
unsigned int	vol_clustsz
	Sectors per cluster.
uint32_t	vol_tabsz
	Number of sectors per allocation table.
uint32_t	vol_tab_sect [2]
	First sector of each allocation table.
unsigned int	vol_rootsz
	Number of sectors used by the root directory.
uint32_t	vol_root_sect
	First sector of the root directory.
uint32_t	vol_root_clust
	First cluster of the root directory.
uint32_t	vol_last_clust
	Last data cluster number.
uint32_t	vol_data_sect
	First data sector.

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Detailed Description

Volume info structure.

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Field Documentation

int _PHATVOL::vol_type

Type of volume.

Either 12, 16 or 32.

Referenced by AllocFirstCluster(), IsFixedRootDir(), PhatDirOpen(), PhatDirReleaseChain(), PhatFilePosSet(), PhatFileRead(), PhatFileWrite(), and PhatVolMount().

uint32_t _PHATVOL::vol_numfree

Number of free clusters.

Referenced by AllocFirstCluster(), Phat12ReleaseChain(), Phat16ReleaseChain(), Phat32ReleaseChain(), PhatFileWrite(), and PhatVolMount().

uint32_t _PHATVOL::vol_nxtfree

Possibly next free cluster.

PHATSECTBUF _PHATVOL::vol_buf[1]

Sector buffer of this volume.

Referenced by Phat12GetClusterLink(), Phat12SetClusterLink(), Phat16GetClusterLink(), Phat16SetClusterLink(), Phat32FreeClusters(), Phat32GetClusterLink(), Phat32SetClusterLink(), PhatDirEntryUpdate(), PhatFileRead(), PhatFileWrite(), PhatSectorBufferRelease(), PhatSectorFlush(), PhatSectorLoad(), PhatSectorWrite(), PhatVolMount(), and PhatVolUnmount().

HANDLE _PHATVOL::vol_fsmutex

Mutual exclusion filesystem access semaphore.

Referenced by PhatVolMount().

HANDLE _PHATVOL::vol_iomutex

Mutual exclusion I/O semaphore.

Referenced by PhatSectorLoad(), PhatSectorWrite(), and PhatVolMount().

unsigned int _PHATVOL::vol_sectsz

Bytes per sector.

Referenced by Phat12GetClusterLink(), Phat12SetClusterLink(), Phat32FreeClusters(), PhatDirCreate(), PhatFilePosSet(), PhatFileRead(), PhatFileWrite(), and PhatVolMount().

unsigned int _PHATVOL::vol_clustsz

Sectors per cluster.

Referenced by PhatClusterSector(), PhatDirCreate(), PhatFilePosSet(), PhatFileRead(), PhatFileWrite(), and PhatVolMount().

uint32_t _PHATVOL::vol_tabsz

Number of sectors per allocation table.

Referenced by PhatVolMount().

uint32_t _PHATVOL::vol_tab_sect[2]

First sector of each allocation table.

We maintain upto two allocation tables.

Referenced by Phat12SetClusterLink(), Phat16SetClusterLink(), Phat32FreeClusters(), Phat32SetClusterLink(), and PhatVolMount().

unsigned int _PHATVOL::vol_rootsz

Number of sectors used by the root directory.

Referenced by PhatFilePosSet(), PhatFileRead(), PhatFileWrite(), and PhatVolMount().

uint32_t _PHATVOL::vol_root_sect

First sector of the root directory.

Referenced by PhatClusterSector(), and PhatVolMount().

uint32_t _PHATVOL::vol_root_clust

First cluster of the root directory.

Referenced by PhatDirCreate(), PhatDirOpen(), and PhatVolMount().

uint32_t _PHATVOL::vol_last_clust

Last data cluster number.

The first cluster number is 2, so this value is equal to the total number of data clusters plus 2.

Referenced by Phat32FreeClusters(), and PhatVolMount().

uint32_t _PHATVOL::vol_data_sect

First data sector.

The first sector following the root directory.

Referenced by PhatClusterSector(), and PhatVolMount().

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The documentation for this struct was generated from the following file:

• include/fs/phatvol.h