bdbuf.h File Reference

Block Device Buffer Management. More...

#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/chain.h>
#include <rtems/blkdev.h>
#include <rtems/diskdevs.h>

Go to the source code of this file.

Data Structures
struct	rtems_bdbuf_buffer
struct	rtems_bdbuf_buffer::rtems_bdbuf_avl_node
struct	rtems_bdbuf_group
struct	rtems_bdbuf_config

Macros
#define	RTEMS_BDBUF_MAX_READ_AHEAD_BLOCKS_DEFAULT   0
#define	RTEMS_BDBUF_MAX_WRITE_BLOCKS_DEFAULT   16
#define	RTEMS_BDBUF_SWAPOUT_TASK_PRIORITY_DEFAULT   15
#define	RTEMS_BDBUF_SWAPOUT_TASK_SWAP_PERIOD_DEFAULT   250
#define	RTEMS_BDBUF_SWAPOUT_TASK_BLOCK_HOLD_DEFAULT   1000
#define	RTEMS_BDBUF_SWAPOUT_WORKER_TASKS_DEFAULT   0
#define	RTEMS_BDBUF_SWAPOUT_WORKER_TASK_PRIORITY_DEFAULT    RTEMS_BDBUF_SWAPOUT_TASK_PRIORITY_DEFAULT
#define	RTEMS_BDBUF_READ_AHEAD_TASK_PRIORITY_DEFAULT    RTEMS_BDBUF_SWAPOUT_TASK_PRIORITY_DEFAULT
#define	RTEMS_BDBUF_TASK_STACK_SIZE_DEFAULT   RTEMS_MINIMUM_STACK_SIZE
#define	RTEMS_BDBUF_CACHE_MEMORY_SIZE_DEFAULT   (64 * 512)
#define	RTEMS_BDBUF_BUFFER_MIN_SIZE_DEFAULT   (512)
#define	RTEMS_BDBUF_BUFFER_MAX_SIZE_DEFAULT   (4096)

Typedefs
typedef struct rtems_bdbuf_group	rtems_bdbuf_group
typedef struct rtems_bdbuf_buffer	rtems_bdbuf_buffer
typedef struct rtems_bdbuf_config	rtems_bdbuf_config

Enumerations
enum	rtems_bdbuf_buf_state {   RTEMS_BDBUF_STATE_FREE = 0 , RTEMS_BDBUF_STATE_EMPTY , RTEMS_BDBUF_STATE_CACHED , RTEMS_BDBUF_STATE_ACCESS_CACHED ,   RTEMS_BDBUF_STATE_ACCESS_MODIFIED , RTEMS_BDBUF_STATE_ACCESS_EMPTY , RTEMS_BDBUF_STATE_ACCESS_PURGED , RTEMS_BDBUF_STATE_MODIFIED ,   RTEMS_BDBUF_STATE_SYNC , RTEMS_BDBUF_STATE_TRANSFER , RTEMS_BDBUF_STATE_TRANSFER_PURGED }
	State of a buffer of the cache. More...

Functions
rtems_status_code	rtems_bdbuf_init (void)
rtems_status_code	rtems_bdbuf_get (rtems_disk_device *dd, rtems_blkdev_bnum block, rtems_bdbuf_buffer **bd)
rtems_status_code	rtems_bdbuf_read (rtems_disk_device *dd, rtems_blkdev_bnum block, rtems_bdbuf_buffer **bd)
void	rtems_bdbuf_peek (rtems_disk_device *dd, rtems_blkdev_bnum block, uint32_t nr_blocks)
	Give a hint which blocks should be cached next. More...
rtems_status_code	rtems_bdbuf_release (rtems_bdbuf_buffer *bd)
rtems_status_code	rtems_bdbuf_release_modified (rtems_bdbuf_buffer *bd)
rtems_status_code	rtems_bdbuf_sync (rtems_bdbuf_buffer *bd)
rtems_status_code	rtems_bdbuf_syncdev (rtems_disk_device *dd)
void	rtems_bdbuf_purge_dev (rtems_disk_device *dd)
	Purges all buffers corresponding to the disk device dd. More...
rtems_status_code	rtems_bdbuf_set_block_size (rtems_disk_device *dd, uint32_t block_size, bool sync)
	Sets the block size of a disk device. More...
void	rtems_bdbuf_get_device_stats (const rtems_disk_device *dd, rtems_blkdev_stats *stats)
	Returns the block device statistics.
void	rtems_bdbuf_reset_device_stats (rtems_disk_device *dd)
	Resets the block device statistics.

Variables
const rtems_bdbuf_config	rtems_bdbuf_configuration

Detailed Description

Block Device Buffer Management.