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/*
* Unit test requirements from linux/blkdev.h and other kernel headers.
*/
#ifndef LINUX_BLKDEV_H
#define LINUX_BLKDEV_H
#include <linux/compiler.h>
#include <linux/types.h>
#include <errno.h>
#include <stdio.h>
#define SECTOR_SHIFT 9
#define SECTOR_SIZE 512
#define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */
/* Defined in linux/kdev_t.h */
#define MINORBITS 20
#define MINORMASK ((1U << MINORBITS) - 1)
#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
#define format_dev_t(buffer, dev) \
sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev))
/* Defined in linux/blk_types.h */
typedef u32 __bitwise blk_opf_t;
typedef unsigned int blk_qc_t;
typedef u8 __bitwise blk_status_t;
#define BLK_STS_OK 0
#define BLK_STS_NOSPC ((blk_status_t)3)
#define BLK_STS_RESOURCE ((blk_status_t)9)
#define BLK_STS_IOERR ((blk_status_t)10)
/* hack for vdo, don't use elsewhere */
#define BLK_STS_VDO_INJECTED ((blk_status_t)31)
struct bio;
struct block_device {
int fd;
dev_t bd_dev;
/* This is only here for bdev_nr_bytes(). */
loff_t size;
};
/* Defined in linux/blk-core.c */
static const struct {
int error;
const char *name;
} blk_errors[] = {
[BLK_STS_OK] = { 0, "" },
[BLK_STS_NOSPC] = { -ENOSPC, "critical space allocation" },
[BLK_STS_RESOURCE] = { -ENOMEM, "kernel resource" },
/* error specifically for VDO unit tests */
[BLK_STS_VDO_INJECTED] = { 31, "vdo injected error" },
/* everything else not covered above: */
[BLK_STS_IOERR] = { -EIO, "I/O" },
};
/**********************************************************************/
static inline int blk_status_to_errno(blk_status_t status)
{
int idx = (int) status;
return blk_errors[idx].error;
}
/**********************************************************************/
static inline blk_status_t errno_to_blk_status(int error)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(blk_errors); i++) {
if (blk_errors[i].error == error)
return (blk_status_t)i;
}
return BLK_STS_IOERR;
}
/**********************************************************************/
void submit_bio_noacct(struct bio *bio);
/**********************************************************************/
static inline loff_t bdev_nr_bytes(struct block_device *bdev)
{
return bdev->size;
}
#endif // LINUX_BLKDEV_H
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