Volume Support

Dealing with volumes. More...

Collaboration diagram for Volume Support:

Data Structures
struct	_PHATVBR
	Volume boot record. More...
struct	_PHATSECTBUF
	Sector buffer structure. More...
struct	_PHATVOL
	Volume info structure. More...
Typedefs
typedef struct _PHATVBR	PHATVBR
	Volume boot record.
typedef struct _PHATSECTBUF	PHATSECTBUF
	Sector buffer structure.
typedef struct _PHATVOL	PHATVOL
	Volume info structure.
Functions
int	PhatVolMount (NUTDEVICE *dev, NUTFILE *blkmnt, uint8_t part_type)
	Mount a PHAT volume.
int	PhatVolUnmount (NUTDEVICE *dev)
	Unmount a PHAT volume.
uint32_t	PhatClusterSector (NUTFILE *nfp, uint32_t clust)

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Detailed Description

Dealing with volumes.

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Typedef Documentation

typedef struct _PHATVBR PHATVBR

Volume boot record.

typedef struct _PHATSECTBUF PHATSECTBUF

Sector buffer structure.

typedef struct _PHATVOL PHATVOL

Volume info structure.

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Function Documentation

int PhatVolMount	(	NUTDEVICE *	dev,
		NUTFILE *	blkmnt,
		uint8_t	part_type
	)

Mount a PHAT volume.

This routine is called by the block device driver while mounting a partition. It reads and verifies the volume boot record, which is located in the first sector of a volume.

The routine may also initializes any caching mechanism. Thus, it must be called before any other read or write access.

Parameters:

dev	Specifies the file system device.
blkmnt	Handle of the block device's partition mount.
part_type	Partition type: PTYPE_FAT32 PTYPE_FAT32_LBA PTYPE_FAT16 PTYPE_FAT16_BIG PTYPE_FAT16_LBA PTYPE_FAT12

Returns:

0 on success or -1 in case of an error.

Definition at line 186 of file phatvol.c.

References _PHATVBR::bios_clustsz, _PHATVBR::bios_media, _PHATVBR::bios_ntabs, _PHATVBR::bios_root_clust, _PHATVBR::bios_rootsz, _PHATVBR::bios_rsvd_sects, _PHATVBR::bios_sectsz, _PHATVBR::bios_tabsz, _PHATVBR::bios_tabsz_big, _PHATVBR::bios_volsz, _PHATVBR::bios_volsz_big, _PHATVBR::boot_drive, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, _NUTDEVICE::dev_ioctl, ENODEV, errno, free(), malloc(), memcpy(), memset(), _NUTFILE::nf_dev, NUTBLKDEV_INFO, NutEventPost(), _BLKPAR_INFO::par_blkbp, _BLKPAR_INFO::par_blksz, _BLKPAR_INFO::par_nfp, PhatDbgVbr(), PhatSectorRead(), PhatVolUnmount(), printf, PTYPE_FAT12, PTYPE_FAT16, PTYPE_FAT16_BIG, PTYPE_FAT16_LBA, PTYPE_FAT32, PTYPE_FAT32_LBA, _PHATSECTBUF::sect_data, _PHATSECTBUF::sect_num, stdout, _PHATVOL::vol_buf, _PHATVOL::vol_clustsz, _PHATVOL::vol_data_sect, _PHATVOL::vol_fsmutex, _PHATVOL::vol_iomutex, _PHATVOL::vol_last_clust, _PHATVOL::vol_numfree, _PHATVOL::vol_root_clust, _PHATVOL::vol_root_sect, _PHATVOL::vol_rootsz, _PHATVOL::vol_sectsz, _PHATVOL::vol_tab_sect, _PHATVOL::vol_tabsz, and _PHATVOL::vol_type.

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int PhatVolUnmount

(

NUTDEVICE *

dev

)

Unmount a PHAT volume.

This routine is called by the block device driver while unmounting a partition.

Parameters:

dev	Specifies the file system device.

Returns:

0 on success or -1 in case of an error.

Definition at line 372 of file phatvol.c.

References _NUTDEVICE::dev_dcb, free(), _PHATSECTBUF::sect_data, and _PHATVOL::vol_buf.

Referenced by PhatVolMount().

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uint32_t PhatClusterSector	(	NUTFILE *	nfp,
		uint32_t	clust
	)

Definition at line 397 of file phatvol.c.

References _NUTDEVICE::dev_dcb, IsFixedRootDir(), _NUTFILE::nf_dev, _PHATVOL::vol_clustsz, _PHATVOL::vol_data_sect, and _PHATVOL::vol_root_sect.

Referenced by PhatDirOpen(), PhatFileOpen(), PhatFileRead(), and PhatFileWrite().

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