xen-blkfront.c File Reference

#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/cdrom.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/scatterlist.h>
#include <linux/bitmap.h>
#include <xen/xen.h>
#include <xen/xenbus.h>
#include <xen/grant_table.h>
#include <xen/events.h>
#include <xen/page.h>
#include <xen/platform_pci.h>
#include <xen/interface/grant_table.h>
#include <xen/interface/io/blkif.h>
#include <xen/interface/io/protocols.h>
#include <asm/xen/hypervisor.h>

Go to the source code of this file.

Data Structures
struct	blk_shadow
struct	blkfront_info

Macros
#define	BLK_RING_SIZE   __CONST_RING_SIZE(blkif, PAGE_SIZE)
#define	MAXIMUM_OUTSTANDING_BLOCK_REQS   (BLKIF_MAX_SEGMENTS_PER_REQUEST * BLK_RING_SIZE)
#define	GRANT_INVALID_REF   0
#define	PARTS_PER_DISK   16
#define	PARTS_PER_EXT_DISK   256
#define	BLKIF_MAJOR(dev)   ((dev)>>8)
#define	BLKIF_MINOR(dev)   ((dev) & 0xff)
#define	EXT_SHIFT   28
#define	EXTENDED   (1<<EXT_SHIFT)
#define	VDEV_IS_EXTENDED(dev)   ((dev)&(EXTENDED))
#define	BLKIF_MINOR_EXT(dev)   ((dev)&(~EXTENDED))
#define	EMULATED_HD_DISK_MINOR_OFFSET   (0)
#define	EMULATED_HD_DISK_NAME_OFFSET   (EMULATED_HD_DISK_MINOR_OFFSET / 256)
#define	EMULATED_SD_DISK_MINOR_OFFSET   (0)
#define	EMULATED_SD_DISK_NAME_OFFSET   (EMULATED_SD_DISK_MINOR_OFFSET / 256)
#define	DEV_NAME   "xvd" /* name in /dev */

Enumerations
enum	blkif_state { BLKIF_STATE_DISCONNECTED, BLKIF_STATE_CONNECTED, BLKIF_STATE_SUSPENDED }

Functions
	module_init (xlblk_init)
	module_exit (xlblk_exit)
	MODULE_DESCRIPTION ("Xen virtual block device frontend")
	MODULE_LICENSE ("GPL")
	MODULE_ALIAS_BLOCKDEV_MAJOR (XENVBD_MAJOR)
	MODULE_ALIAS ("xen:vbd")
	MODULE_ALIAS ("xenblk")

Macro Definition Documentation

#define BLK_RING_SIZE   __CONST_RING_SIZE(blkif, PAGE_SIZE)

Definition at line 76 of file xen-blkfront.c.

#define BLKIF_MAJOR

(

dev

)

((dev)>>8)

Definition at line 121 of file xen-blkfront.c.

#define BLKIF_MINOR

(

dev

)

((dev) & 0xff)

Definition at line 122 of file xen-blkfront.c.

#define BLKIF_MINOR_EXT

(

dev

)

((dev)&(~EXTENDED))

Definition at line 127 of file xen-blkfront.c.

#define DEV_NAME   "xvd" /* name in /dev */

Definition at line 133 of file xen-blkfront.c.

#define EMULATED_HD_DISK_MINOR_OFFSET   (0)

Definition at line 128 of file xen-blkfront.c.

#define EMULATED_HD_DISK_NAME_OFFSET   (EMULATED_HD_DISK_MINOR_OFFSET / 256)

Definition at line 129 of file xen-blkfront.c.

#define EMULATED_SD_DISK_MINOR_OFFSET   (0)

Definition at line 130 of file xen-blkfront.c.

#define EMULATED_SD_DISK_NAME_OFFSET   (EMULATED_SD_DISK_MINOR_OFFSET / 256)

Definition at line 131 of file xen-blkfront.c.

#define EXT_SHIFT   28

Definition at line 124 of file xen-blkfront.c.

#define EXTENDED   (1<<EXT_SHIFT)

Definition at line 125 of file xen-blkfront.c.

#define GRANT_INVALID_REF   0

Definition at line 116 of file xen-blkfront.c.

#define MAXIMUM_OUTSTANDING_BLOCK_REQS   (BLKIF_MAX_SEGMENTS_PER_REQUEST * BLK_RING_SIZE)

Definition at line 114 of file xen-blkfront.c.

#define PARTS_PER_DISK   16

Definition at line 118 of file xen-blkfront.c.

#define PARTS_PER_EXT_DISK   256

Definition at line 119 of file xen-blkfront.c.

#define VDEV_IS_EXTENDED

(

dev

)

((dev)&(EXTENDED))

Definition at line 126 of file xen-blkfront.c.

Enumeration Type Documentation

enum blkif_state

Enumerator:

BLKIF_STATE_DISCONNECTED
BLKIF_STATE_CONNECTED
BLKIF_STATE_SUSPENDED

Definition at line 61 of file xen-blkfront.c.

Function Documentation

MODULE_ALIAS

(

"xen:vbd"

)

MODULE_ALIAS

(

"xenblk"

)

MODULE_ALIAS_BLOCKDEV_MAJOR

(

XENVBD_MAJOR

)

MODULE_DESCRIPTION

(

"Xen virtual block device frontend"

)

module_exit

(

xlblk_exit

)

module_init

(

xlblk_init

)

MODULE_LICENSE

(

"GPL"

)