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/******************************************************************************
* arch/xen/drivers/blkif/frontend/common.h
*
* Shared definitions between all levels of XenoLinux Virtual block devices.
*/
#ifndef __XEN_DRIVERS_COMMON_H__
#define __XEN_DRIVERS_COMMON_H__
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/hdreg.h>
#include <linux/blkdev.h>
#include <linux/major.h>
#include <asm/hypervisor-ifs/hypervisor-if.h>
#include <asm/hypervisor-ifs/vbd.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
#include "../blkif.h"
#if 0
#define DPRINTK(_f, _a...) printk ( KERN_ALERT _f , ## _a )
#else
#define DPRINTK(_f, _a...) ((void)0)
#endif
#if 0
#define DPRINTK_IOCTL(_f, _a...) printk ( KERN_ALERT _f , ## _a )
#else
#define DPRINTK_IOCTL(_f, _a...) ((void)0)
#endif
/* Private gendisk->flags[] values. */
#define GENHD_FL_XEN 2 /* Is unit a Xen block device? */
#define GENHD_FL_VIRT_PARTNS 4 /* Are unit partitions virtual? */
/*
* We have one of these per vbd, whether ide, scsi or 'other'.
* They hang in an array off the gendisk structure. We may end up putting
* all kinds of interesting stuff here :-)
*/
typedef struct xl_disk {
int usage;
} xl_disk_t;
extern int blkif_open(struct inode *inode, struct file *filep);
extern int blkif_release(struct inode *inode, struct file *filep);
extern int blkif_ioctl(struct inode *inode, struct file *filep,
unsigned command, unsigned long argument);
extern int blkif_check(kdev_t dev);
extern int blkif_revalidate(kdev_t dev);
extern void blkif_control_send(blkif_request_t *req, blkif_response_t *rsp);
extern void do_blkif_request (request_queue_t *rq);
extern void xlvbd_update_vbds(void);
static inline xl_disk_t *xldev_to_xldisk(kdev_t xldev)
{
struct gendisk *gd = get_gendisk(xldev);
if ( gd == NULL )
return NULL;
return (xl_disk_t *)gd->real_devices +
(MINOR(xldev) >> gd->minor_shift);
}
/* Virtual block-device subsystem. */
extern int xlvbd_init(void);
extern void xlvbd_cleanup(void);
#endif /* __XEN_DRIVERS_COMMON_H__ */
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