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/* $OpenBSD: tcfs_rw.h,v 1.3 2000/06/17 20:25:55 provos Exp $ */
/*
* Copyright 2000 The TCFS Project at http://tcfs.dia.unisa.it/
* 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. The name of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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 _TCFS_RW_H_
#define _TCFS_RW_H_
/* Gestione informazioni sui files cifrati */
#include <miscfs/tcfs/tcfs_fileinfo.h>
typedef struct {
tcfs_fileinfo i;
int off;
int req;
int tcfs_op_desc;
int in_boff;
int in_foff;
int out_boff;
int out_foff;
} tcfs_opinfo;
/* tcfs_opinfo x */
#define ROFF(x) ((x)->off%BLOCKSIZE)
#define LAST(x) ((x)->off+(x)->req-1)
#define BOFF(x) (((x)->off/BLOCKSIZE)*BLOCKSIZE)
#define FOFF(x) (LAST((x))+BLOCKSIZE-(LAST((x))%BLOCKSIZE+1))
#define P_BOFF(x) (((x)->off/SBLOCKSIZE)*SBLOCKSIZE)
#define P_FOFF(x) (LAST((x))+SBLOCKSIZE-(LAST((x))%SBLOCKSIZE+1))
#define SPURE(x) ((x)->req%SBLOCKSIZE?(SBLOCKSIZE-(x)->req%SBLOCKSIZE):0)
/* int o */
#define D_BOFF(o) (((o)/BLOCKSIZE)*BLOCKSIZE)
#define D_FOFF(o) ((o)+BLOCKSIZE-((o)%BLOCKSIZE+1))
#define D_PFOFF(o) ((o)+SBLOCKSIZE-((o)%SBLOCKSIZE+1))
#define D_SPURE(o) ((o)%SBLOCKSIZE?(SBLOCKSIZE-(o)%SBLOCKSIZE):0)
#define D_NOBLK(o) ((o)/BLOCKSIZE+(o%BLOCKSIZE?1:0))
#define TCFS_NONE 0
#define TCFS_READ_C1 1
#define TCFS_READ_C2 2
#define TCFS_WRITE_C1 3
#define TCFS_WRITE_C2 4
#define TCFS_WRITE_C3 5
#define TCFS_WRITE_C4 6
#define TCFS_WRITE_C5 7
/* prototypes */
char *tcfs_new_uio_i(struct uio*,struct uio**,tcfs_opinfo*);
char *tcfs_new_uio_obs(struct uio*,struct uio**,int off, int ireq);
void tcfs_dispose_new_uio(struct uio *);
void dispose_new_uio(struct uio *);
int tcfs_ed(struct vnode*, struct proc*, struct ucred *, tcfs_fileinfo *);
tcfs_opinfo tcfs_get_opinfo(void*);
#endif /* _TCFS_RW_H_ */
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