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/*
* Copyright (c) 1995 - 2000 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. 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.
*/
/* $Id: xfs_dev.h,v 1.5 2000/09/11 14:26:52 art Exp $ */
#ifndef _xfs_dev_h
#define _xfs_dev_h
/*
* Queues of xfs_links hold outbound messages and processes sleeping
* for replies. The last field is used to return error to sleepers and
* to keep record of memory to be deallocated when messages have been
* delivered or dropped.
*/
struct xfs_link {
struct xfs_link *prev, *next;
struct xfs_message_header *message;
u_int error_or_size; /* error on sleepq and size on
* messageq */
};
struct xfs_channel {
struct xfs_link messageq; /* Messages not yet read */
struct xfs_link sleepq; /* Waiting for reply message */
u_int nsequence;
#ifdef __osf__
sel_queue_t sel_q;
#else
struct selinfo selinfo;
#endif
struct xfs_message_header *message_buffer;
int status;
#define CHANNEL_OPENED 0x1
#define CHANNEL_WAITING 0x2
};
extern struct xfs_channel xfs_channel[NXFS];
/*
* These are variant dependent
*/
void xfs_select_wakeup(struct xfs_channel *);
int xfs_install_device(void);
int xfs_uninstall_device(void);
int xfs_install_filesys(void);
int xfs_may_uninstall_filesys(void);
int xfs_uninstall_filesys(void);
int xfs_stat_filesys(void);
int xfs_stat_device(void);
/*
* And these should be generic
*/
void
xfs_initq(struct xfs_link *q);
int
xfs_emptyq(const struct xfs_link *q);
int
xfs_onq(const struct xfs_link *link);
void
xfs_appendq(struct xfs_link *q, struct xfs_link *p);
void
xfs_outq(struct xfs_link *p);
int
xfs_devopen_common(dev_t dev);
#ifndef __osf__ /* XXX - we should do the same for osf */
int xfs_devopen(dev_t dev, int flag, int devtype, struct proc *proc);
int xfs_devclose(dev_t dev, int flag, int devtype, struct proc *proc);
int xfs_devioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
struct proc *p);
int xfs_devselect(dev_t dev, int which, struct proc *p);
#endif /* ! __osf__ */
int
xfs_devclose_common(dev_t dev, struct proc *p);
int
xfs_devread(dev_t dev, struct uio * uiop, int ioflag);
int
xfs_devwrite(dev_t dev, struct uio *uiop, int ioflag);
int
xfs_message_send(int fd, struct xfs_message_header * message, u_int size);
int
xfs_message_rpc(int fd, struct xfs_message_header * message, u_int size);
int
xfs_message_receive(int fd,
struct xfs_message_header *message,
u_int size,
struct proc *p);
int
xfs_message_wakeup(int fd,
struct xfs_message_wakeup *message,
u_int size,
struct proc *p);
int
xfs_message_wakeup_data(int fd,
struct xfs_message_wakeup_data * message,
u_int size,
struct proc *p);
int
xfs_uprintf_device(void);
int
xfs_is_xfs_dev (dev_t dev);
#endif /* _xfs_dev_h */
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