zone.c File Reference

implementation of the lizbd which is inherited by the device More...

#include <libzbd/zbd.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <glib.h>
#include <unistd.h>
#include "include/zone.h"
#include "include/device.h"
#include "include/log.h"

Include dependency graph for zone.c:

Macros
#define	_GNU_SOURCE

Functions
int	zone_open (struct device *dev, const char *name, int flags)
	open the zoned block deivce file More...
static ssize_t	zone_do_rw (int fd, int flag, void *buffer, size_t count, off_t offset)
	execute the read and write function More...
ssize_t	zone_write (struct device *dev, struct device_request *request)
	write to the zoned block device More...
ssize_t	zone_read (struct device *dev, struct device_request *request)
	read to the zoned block device More...
int	zone_erase (struct device *dev, struct device_request *request)
	erase the segment to the zoned block device More...
int	zone_close (struct device *dev)
	close the zoned block device More...
int	zone_device_init (struct device *dev, uint64_t flags)
	initialize the device module More...
int	zone_device_exit (struct device *dev)
	deallocate the device module More...

Variables
struct device_operations	__zone_dops
	zoned block device operations More...

Detailed Description

implementation of the lizbd which is inherited by the device

Author

Gijun Oh

Version

0.2

Date

2021-10-09

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE

Function Documentation

zone_close()

int zone_close

(

struct device *

dev

)

close the zoned block device

Parameters

dev	pointer of the device structure

Returns

0 for success, negative number for fail

zone_device_exit()

int zone_device_exit

(

struct device *

dev

)

deallocate the device module

Parameters

dev	pointer of the device structure

Returns

0 for success, negative value for fail

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zone_device_init()

int zone_device_init	(	struct device *	dev,
		uint64_t	flags
	)

initialize the device module

Parameters

dev	pointer of the device structure
flags	flags for ramdisk and device

Returns

0 for sucess, negative value for fail

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zone_do_rw()

static ssize_t zone_do_rw ( int  fd, int  flag, void *  buffer, size_t  count, off_t  offset  )

static

execute the read and write function

Parameters

fd	the number which contains the file descriptor
flag	I/O direction
buffer	pointer of the buffer
count	the number of byte to read or write
offset	position which wants to read or write

Returns

the number of bytes after read or write, negative number means fail

zone_erase()

int zone_erase	(	struct device *	dev,
		struct device_request *	request
	)

erase the segment to the zoned block device

Parameters

dev	pointer of the device structre
request	pointer of the user request

Returns

0 for success, negative number for fail

zone_open()

int zone_open	(	struct device *	dev,
		const char *	name,
		int	flags
	)

open the zoned block deivce file

Parameters

dev	pointer of the device structure
name	zoned block device's device filename
flags	open flags for ramdisk

Returns

0 for success, negative number for fail

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zone_read()

ssize_t zone_read	(	struct device *	dev,
		struct device_request *	request
	)

read to the zoned block device

Parameters

dev	pointer of the device structre
request	pointer of the user request

Returns

the number of bytes to read, negative number for fail

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zone_write()

ssize_t zone_write	(	struct device *	dev,
		struct device_request *	request
	)

write to the zoned block device

Parameters

dev	pointer of the device structre
request	pointer of the user request

Returns

the number of bytes to write, negative number for fail

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Variable Documentation

__zone_dops

struct device_operations __zone_dops

Initial value:

= {
    .open = zone_open,
    .write = zone_write,
    .read = zone_read,
    .erase = zone_erase,
    .close = zone_close,
}

zoned block device operations