_BLOCKVOLUME Struct Reference

Block volume information structure. More...

Collaboration diagram for _BLOCKVOLUME:

Data Fields
NUTDEVICE *	vol_fsdev
	Attached file system device.
uint32_t	vol_blk_cnt
	Number of blocks available to the file system.
int	vol_blk_len
	Number of bytes in a block.
uint32_t	vol_blk_off
	First page used by the file system.
uint32_t	vol_blk_num
	Next block number to read.
uint8_t *	vol_blk_buf
	Internal block buffer.

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Detailed Description

Block volume information structure.

Definition at line 64 of file blockdev.c.

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Field Documentation

NUTDEVICE* _BLOCKVOLUME::vol_fsdev

Attached file system device.

Definition at line 67 of file blockdev.c.

Referenced by NutBlockDeviceClose(), and NutBlockDeviceOpen().

uint32_t _BLOCKVOLUME::vol_blk_cnt

Number of blocks available to the file system.

Definition at line 71 of file blockdev.c.

Referenced by NutBlockDeviceIOCtl(), NutBlockDeviceOpen(), NutBlockDeviceRead(), NutBlockDeviceSize(), NutBlockDeviceWrite(), and NutBlockDeviceWrite_P().

int _BLOCKVOLUME::vol_blk_len

Number of bytes in a block.

Definition at line 75 of file blockdev.c.

Referenced by NutBlockDeviceIOCtl(), NutBlockDeviceOpen(), NutBlockDeviceRead(), NutBlockDeviceSize(), NutBlockDeviceWrite(), and NutBlockDeviceWrite_P().

uint32_t _BLOCKVOLUME::vol_blk_off

First page used by the file system.

Definition at line 79 of file blockdev.c.

Referenced by NutBlockDeviceOpen(), NutBlockDeviceRead(), NutBlockDeviceWrite(), and NutBlockDeviceWrite_P().

uint32_t _BLOCKVOLUME::vol_blk_num

Next block number to read.

The file system driver will send a NUTBLKDEV_SEEK control command to set this value before calling the read or the write routine.

The number is zero based.

Definition at line 88 of file blockdev.c.

Referenced by NutBlockDeviceIOCtl(), NutBlockDeviceOpen(), NutBlockDeviceRead(), NutBlockDeviceWrite(), and NutBlockDeviceWrite_P().

uint8_t* _BLOCKVOLUME::vol_blk_buf

Internal block buffer.

A file system driver may use this one or optionally provide it's own buffers.

Minimal systems may share their external bus interface with device I/O lines, in which case the buffer must be located in internal memory.

Definition at line 99 of file blockdev.c.

Referenced by NutBlockDeviceIOCtl(), and NutBlockDeviceOpen().

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

• dev/blockdev.c