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/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)buf.h 8.9 (Berkeley) 3/30/95
* $FreeBSD$
*/
#ifndef _SYS_BIO_H_
#define _SYS_BIO_H_
#include <stdint.h>
/* bio_cmd */
#define BIO_READ 0x01
#define BIO_WRITE 0x02
#define BIO_DELETE 0x04
#define BIO_GETATTR 0x08
#define BIO_FLUSH 0x10
#define BIO_CMD0 0x20 /* Available for local hacks */
#define BIO_CMD1 0x40 /* Available for local hacks */
#define BIO_CMD2 0x80 /* Available for local hacks */
/* bio_flags */
#define BIO_ERROR 0x01
#define BIO_DONE 0x02
#define BIO_ONQUEUE 0x04
#define BIO_ORDERED 0x08
struct disk;
struct bio;
/* Empty classifier tag, to prevent further classification. */
#define BIO_NOTCLASSIFIED (void *)(~0UL)
typedef void bio_task_t(void *);
/*
* The bio structure describes an I/O operation in the kernel.
*/
struct bio {
uint8_t bio_cmd; /* I/O operation. */
uint8_t bio_flags; /* General flags. */
struct device *bio_dev; /* Device to do I/O on. */
off_t bio_offset; /* Offset into file. */
long bio_bcount; /* Valid bytes in buffer. */
void *bio_data; /* Memory, superblocks, indirect etc. */
int bio_error; /* Errno for BIO_ERROR. */
long bio_resid; /* Remaining I/O in bytes. */
void (*bio_done)(struct bio *);
};
#endif /* !_SYS_BIO_H_ */