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/* $NetBSD: cgdvar.h,v 1.21 2020/06/13 22:15:58 riastradh Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Roland C. Dowdeswell.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _DEV_CGDVAR_H_
#define _DEV_CGDVAR_H_
#include <sys/ioccom.h>
/* ioctl(2) code: used by CGDIOCSET and CGDIOCCLR */
struct cgd_ioctl {
const char *ci_disk;
int ci_flags;
int ci_unit;
size_t ci_size;
const char *ci_alg;
const char *ci_ivmethod;
size_t ci_keylen;
const char *ci_key;
size_t ci_blocksize;
};
/* ioctl(2) code: used by CGDIOCGET */
struct cgd_user {
int cgu_unit; /* which cgd unit */
dev_t cgu_dev; /* target device */
char cgu_alg[32]; /* algorithm name */
size_t cgu_blocksize; /* block size (in bytes) */
int cgu_mode; /* Cipher Mode and IV Gen method */
#define CGD_CIPHER_CBC_ENCBLKNO8 1 /* CBC Mode w/ Enc Block Number
* 8 passes (compat only)
*/
#define CGD_CIPHER_CBC_ENCBLKNO1 2 /* CBC Mode w/ Enc Block Number
* 1 pass (default)
*/
int cgu_keylen; /* keylength */
};
#ifdef _KERNEL
#include <dev/cgd_crypto.h>
#include <dev/dkvar.h>
/* This cryptdata structure is here rather than cgd_crypto.h, since
* it stores local state which will not be generalised beyond the
* cgd driver.
*/
struct cryptdata {
size_t cf_blocksize; /* block size (in bytes) */
int cf_keylen; /* key length */
int cf_mode; /* Cipher Mode and IV Gen method
* (see cgu_mode above for defines) */
void *cf_priv; /* enc alg private data */
};
struct cgd_xfer {
struct work cx_work;
struct cgd_softc *cx_sc;
struct buf *cx_obp;
struct buf *cx_nbp;
void *cx_dstv;
const void *cx_srcv;
size_t cx_len;
daddr_t cx_blkno;
size_t cx_secsize;
int cx_dir;
};
struct cgd_worker {
struct workqueue *cw_wq; /* work queue */
struct pool *cw_cpool; /* cgd_xfer contexts */
u_int cw_busy; /* number of busy contexts */
u_int cw_last; /* index of last CPU used */
kmutex_t cw_lock;
};
struct cgd_softc {
struct dk_softc sc_dksc; /* generic disk interface */
struct vnode *sc_tvn; /* target device's vnode */
dev_t sc_tdev; /* target device */
char *sc_tpath; /* target device's path */
void *sc_data; /* emergency buffer */
bool sc_data_used; /* Really lame, we'll change */
size_t sc_tpathlen; /* length of prior string */
struct cryptdata sc_cdata; /* crypto data */
const struct cryptfuncs *sc_cfuncs; /* encryption functions */
kmutex_t sc_lock;
kcondvar_t sc_cv;
bool sc_busy;
struct cgd_worker *sc_worker; /* shared worker data */
};
#endif
/* XXX XAX XXX elric: check these out properly. */
#define CGDIOCSET _IOWR('F', 18, struct cgd_ioctl)
#define CGDIOCCLR _IOW('F', 19, struct cgd_ioctl)
#define CGDIOCGET _IOWR('F', 20, struct cgd_user)
/* Maximum block sized to be used by the ciphers */
#define CGD_MAXBLOCKSIZE 128
#endif /* _DEV_CGDVAR_H_ */
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