drivers/md/dm-vdo/io-submitter.h

Source file repositories/reference/linux-study-clean/drivers/md/dm-vdo/io-submitter.h

File Facts

System
Linux kernel
Corpus path
drivers/md/dm-vdo/io-submitter.h
Extension
.h
Size
1917 bytes
Lines
64
Domain
Driver Families
Bucket
drivers/md
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef VDO_IO_SUBMITTER_H
#define VDO_IO_SUBMITTER_H

#include <linux/bio.h>

#include "constants.h"
#include "types.h"

struct io_submitter;

int vdo_make_io_submitter(unsigned int thread_count, unsigned int rotation_interval,
			  unsigned int max_requests_active, struct vdo *vdo,
			  struct io_submitter **io_submitter);

void vdo_cleanup_io_submitter(struct io_submitter *io_submitter);

void vdo_free_io_submitter(struct io_submitter *io_submitter);

void vdo_submit_vio(struct vdo_completion *completion);

void vdo_submit_data_vio(struct data_vio *data_vio);

void __submit_metadata_vio(struct vio *vio, physical_block_number_t physical,
			   bio_end_io_t callback, vdo_action_fn error_handler,
			   blk_opf_t operation, char *data, int size);

static inline void vdo_submit_metadata_vio(struct vio *vio, physical_block_number_t physical,
					   bio_end_io_t callback, vdo_action_fn error_handler,
					   blk_opf_t operation)
{
	__submit_metadata_vio(vio, physical, callback, error_handler,
			      operation, vio->data, vio->block_count * VDO_BLOCK_SIZE);
}

static inline void vdo_submit_metadata_vio_with_size(struct vio *vio,
						     physical_block_number_t physical,
						     bio_end_io_t callback,
						     vdo_action_fn error_handler,
						     blk_opf_t operation,
						     int size)
{
	__submit_metadata_vio(vio, physical, callback, error_handler,
			      operation, vio->data, size);
}

static inline void vdo_submit_flush_vio(struct vio *vio, bio_end_io_t callback,
					vdo_action_fn error_handler)
{
	/* FIXME: Can we just use REQ_OP_FLUSH? */
	__submit_metadata_vio(vio, 0, callback, error_handler,
			      REQ_OP_WRITE | REQ_PREFLUSH, NULL, 0);
}

int vdo_submit_metadata_vio_wait(struct vio *vio,
				 physical_block_number_t physical,
				 blk_opf_t operation);

#endif /* VDO_IO_SUBMITTER_H */

Annotation

Implementation Notes