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/* $OpenBSD: xfs_dev-bsd.c,v 1.10 2004/01/18 21:46:54 beck Exp $
* Copyright (c) 2004 Bob Beck
* Copyright (c) 1995 - 2003 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*/
#include <xfs/xfs_locl.h>
#include <xfs/xfs_message.h>
#include <xfs/xfs_msg_locl.h>
#include <xfs/xfs_fs.h>
#include <xfs/xfs_dev.h>
#include <xfs/xfs_deb.h>
int
xfs_devopen(dev_t dev, int flag, int devtype, d_thread_t *proc)
{
NNPFSDEB(XDEBDEV, ("xfsopen dev = %d.%d, flag = %d, devtype = %d\n",
major(dev), minor(dev), flag, devtype));
return xfs_devopen_common(dev);
}
int
xfs_devclose(dev_t dev, int flag, int devtype, d_thread_t *p)
{
NNPFSDEB(XDEBDEV, ("xfs_devclose dev = %d(%d), flag = 0x%x\n",
major(dev), minor(dev), flag));
return xfs_devclose_common(dev, p);
}
int
xfs_devioctl(dev_t dev, u_long cmd, caddr_t data, int flags, d_thread_t *p)
{
NNPFSDEB(XDEBDEV, ("xfs_devioctl dev = %d.%d, cmd = %lu, "
"data = %lx, flags = %x\n", major(dev), minor(dev),
(unsigned long)cmd, (unsigned long)data, flags));
return ENOTTY;
}
int
xfs_devpoll(dev_t dev, int events, d_thread_t * p)
{
struct xfs_channel *chan = &xfs_channel[minor(dev)];
NNPFSDEB(XDEBDEV, ("xfs_devpoll dev = %d(%d), events = 0x%x\n",
major(dev), minor(dev), events));
if ((events & (POLLIN | POLLRDNORM)) == 0)
return 0; /* only supports read */
if (!xfs_emptyq(&chan->messageq))
return (events & (POLLIN | POLLRDNORM));
selrecord (p, &chan->selinfo);
return 0;
}
void
xfs_select_wakeup(struct xfs_channel *chan)
{
selwakeup (&chan->selinfo);
}
/*
* Install and uninstall device.
*/
struct cdevsw xfs_dev = {
xfs_devopen,
xfs_devclose,
xfs_devread,
xfs_devwrite,
xfs_devioctl,
(dev_type_stop((*))) enodev,
0,
xfs_devpoll,
(dev_type_mmap((*))) enodev,
0
};
int
xfs_install_device(void)
{
int i;
for (i = 0; i < NNNPFS; i++) {
NNPFSDEB(XDEBDEV, ("before initq(messageq and sleepq)\n"));
xfs_initq(&xfs_channel[i].messageq);
xfs_initq(&xfs_channel[i].sleepq);
xfs_channel[i].status = 0;
}
return 0;
}
int
xfs_uninstall_device(void)
{
int i;
struct xfs_channel *chan;
int ret = 0;
for (i = 0; i < NNNPFS; i++) {
chan = &xfs_channel[i];
if (chan->status & CHANNEL_OPENED)
xfs_devclose(makedev(0, i), 0, 0, NULL);
}
NNPFSDEB(XDEBLKM, ("xfs_uninstall_device error %d\n", ret));
return ret;
}
int
xfs_stat_device(void)
{
return xfs_uprintf_device();
}
int
xfs_is_xfs_dev(dev_t dev)
{
return major(dev) <= nchrdev &&
cdevsw[major(dev)].d_open == xfs_devopen &&
minor(dev) >= 0 && minor(dev) < NNNPFS;
}
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