Block Device Buffer Management. More...

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

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.

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.

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.

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.

Detailed Description

Block Device Buffer Management.

Data Structures