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- /*
- * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
- * The President and Fellows of Harvard College.
- *
- * 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.
- * 3. 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 UNIVERSITY 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 UNIVERSITY 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.
- */
- #ifndef _DEVICE_H_
- #define _DEVICE_H_
- /*
- * Devices.
- */
- struct uio; /* in <uio.h> */
- /*
- * Filesystem-namespace-accessible device.
- * d_io is for both reads and writes; the uio indicates the direction.
- */
- struct device {
- int (*d_open)(struct device *, int flags_from_open);
- int (*d_close)(struct device *);
- int (*d_io)(struct device *, struct uio *);
- int (*d_ioctl)(struct device *, int op, userptr_t data);
- blkcnt_t d_blocks;
- blksize_t d_blocksize;
- dev_t d_devnumber; /* serial number for this device */
- void *d_data; /* device-specific data */
- };
- /* Create vnode for a vfs-level device. */
- struct vnode *dev_create_vnode(struct device *dev);
- /* Initialization functions for builtin vfs-level devices. */
- void devnull_create(void);
- /* Function that kicks off device probe and attach. */
- void dev_bootstrap(void);
- #endif /* _DEVICE_H_ */
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