common.h File Reference

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>
#include <linux/io.h>
#include <asm/setup.h>
#include <asm/pgalloc.h>
#include <asm/hypervisor.h>
#include <xen/grant_table.h>
#include <xen/xenbus.h>
#include <xen/interface/io/ring.h>
#include <xen/interface/io/blkif.h>
#include <xen/interface/io/protocols.h>

Go to the source code of this file.

Data Structures
struct	blkif_common_request
struct	blkif_common_response
struct	blkif_x86_32_request_rw
struct	blkif_x86_32_request_discard
struct	blkif_x86_32_request
struct	blkif_x86_32_response
struct	blkif_x86_64_request_rw
struct	blkif_x86_64_request_discard
struct	blkif_x86_64_request
struct	blkif_x86_64_response
union	blkif_back_rings
struct	xen_vbd
struct	xen_blkif
struct	phys_req

Macros
#define	DRV_PFX   "xen-blkback:"
#define	DPRINTK(fmt, args...)
#define	vbd_sz(_v)
#define	xen_blkif_get(_b)   (atomic_inc(&(_b)->refcnt))
#define	xen_blkif_put(_b)

Enumerations
enum	blkif_protocol { BLKIF_PROTOCOL_NATIVE = 1, BLKIF_PROTOCOL_X86_32 = 2, BLKIF_PROTOCOL_X86_64 = 3 }

Functions
struct blkif_x86_32_request_rw	__attribute__ ((__packed__))
	DEFINE_RING_TYPES (blkif_common, struct blkif_common_request, struct blkif_common_response)
	DEFINE_RING_TYPES (blkif_x86_32, struct blkif_x86_32_request, struct blkif_x86_32_response)
	DEFINE_RING_TYPES (blkif_x86_64, struct blkif_x86_64_request, struct blkif_x86_64_response)
int	xen_blkif_interface_init (void)
int	xen_blkif_xenbus_init (void)
irqreturn_t	xen_blkif_be_int (int irq, void *dev_id)
int	xen_blkif_schedule (void *arg)
int	xen_blkbk_flush_diskcache (struct xenbus_transaction xbt, struct backend_info *be, int state)
int	xen_blkbk_barrier (struct xenbus_transaction xbt, struct backend_info *be, int state)
struct xenbus_device *	xen_blkbk_xenbus (struct backend_info *be)

Variables
uint8_t	nr_segments
blkif_vdev_t	handle
uint64_t	id
blkif_sector_t	sector_number
struct blkif_request_segment	seg [BLKIF_MAX_SEGMENTS_PER_REQUEST]
uint8_t	flag
blkif_vdev_t	_pad1
uint64_t	nr_sectors
uint8_t	operation
union {
struct blkif_x86_32_request_rw   rw
struct blkif_x86_32_request_discard   discard
}	u
struct blkif_x86_32_response	__attribute__
uint32_t	_pad2

Macro Definition Documentation

#define DPRINTK	(		fmt,
			args...
	)

Value:

pr_debug(DRV_PFX "(%s:%d) " fmt ".\n",      \
         __func__, __LINE__, ##args)

Definition at line 47 of file common.h.

#define DRV_PFX   "xen-blkback:"

Definition at line 46 of file common.h.

#define vbd_sz

(

_v

)

Value:

((_v)->bdev->bd_part ? \
             (_v)->bdev->bd_part->nr_sects : \
              get_capacity((_v)->bdev->bd_disk))

Definition at line 207 of file common.h.

#define xen_blkif_get

(

_b

)

(atomic_inc(&(_b)->refcnt))

Definition at line 211 of file common.h.

#define xen_blkif_put

(

_b

)

Value:

do {                        \
        if (atomic_dec_and_test(&(_b)->refcnt)) \
            wake_up(&(_b)->waiting_to_free);\
    } while (0)

Definition at line 212 of file common.h.

Enumeration Type Documentation

enum blkif_protocol

Enumerator:

BLKIF_PROTOCOL_NATIVE
BLKIF_PROTOCOL_X86_32
BLKIF_PROTOCOL_X86_64

Definition at line 143 of file common.h.

Function Documentation

struct blkif_x86_32_request_rw __attribute__ ( (__packed__)  )

read

Definition at line 85 of file mpc512x_dma.c.

DEFINE_RING_TYPES	(	blkif_common	,
		struct blkif_common_request	,
		struct blkif_common_response
	)

DEFINE_RING_TYPES	(	blkif_x86_32	,
		struct blkif_x86_32_request	,
		struct blkif_x86_32_response
	)

DEFINE_RING_TYPES	(	blkif_x86_64	,
		struct blkif_x86_64_request	,
		struct blkif_x86_64_response
	)

int xen_blkbk_barrier	(	struct xenbus_transaction	xbt,
		struct backend_info *	be,
		int	state
	)

Definition at line 427 of file xenbus.c.

int xen_blkbk_flush_diskcache	(	struct xenbus_transaction	xbt,
		struct backend_info *	be,
		int	state
	)

Definition at line 374 of file xenbus.c.

struct xenbus_device* xen_blkbk_xenbus ( struct backend_info *  be )

read

Definition at line 39 of file xenbus.c.

irqreturn_t xen_blkif_be_int	(	int	irq,
		void *	dev_id
	)

Definition at line 250 of file blkback.c.

int xen_blkif_interface_init

(

void

)

Definition at line 205 of file xenbus.c.

int xen_blkif_schedule

(

void *

arg

)

Definition at line 274 of file blkback.c.

int xen_blkif_xenbus_init

(

void

)

Definition at line 783 of file xenbus.c.

Variable Documentation

struct blkif_x86_64_response __attribute__

blkif_vdev_t _pad1

Definition at line 79 of file common.h.

uint32_t _pad2

Definition at line 116 of file common.h.

struct blkif_x86_64_request_discard discard

Definition at line 89 of file common.h.

uint8_t flag

Definition at line 78 of file common.h.

blkif_vdev_t handle

Definition at line 71 of file common.h.

uint64_t id

Definition at line 72 of file common.h.

uint64_t nr_sectors

Definition at line 82 of file common.h.

uint8_t nr_segments

Definition at line 70 of file common.h.

uint8_t operation

Definition at line 86 of file common.h.

struct blkif_x86_64_request_rw rw

Definition at line 88 of file common.h.

blkif_sector_t sector_number

Definition at line 73 of file common.h.

struct blkif_request_segment seg

Definition at line 74 of file common.h.

union { ... } u