/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_LOCKFS_H
#define _SYS_LOCKFS_H

#ifdef  __cplusplus
extern "C" {
#endif

#ifdef _SYSCALL32
/*
 * ILP32 version of lockfs, used in ufs_ioctl() to support 32-bit app in
 * LP64 kernel
 */
struct lockfs32 {
        uint32_t        lf_lock;        /* desired lock */
        uint32_t        lf_flags;       /* misc flags */
        uint32_t        lf_key;         /* lock key */
        uint32_t        lf_comlen;      /* length of comment */
        uint32_t        lf_comment;     /* address of comment */
};
#endif /* _SYSCALL32 */

struct lockfs {
        ulong_t         lf_lock;        /* desired lock */
        ulong_t         lf_flags;       /* misc flags */
        ulong_t         lf_key;         /* lock key */
        ulong_t         lf_comlen;      /* length of comment */
        caddr_t         lf_comment;     /* address of comment */
};

/*
 * lf_lock and lf_locking
 */
#define LOCKFS_ULOCK    0       /* unlock */
#define LOCKFS_WLOCK    1       /* write  lock */
#define LOCKFS_NLOCK    2       /* name   lock */
#define LOCKFS_DLOCK    3       /* delete lock */
#define LOCKFS_HLOCK    4       /* hard   lock */
#define LOCKFS_ELOCK    5       /* error  lock */
#define LOCKFS_ROELOCK  6       /* error  lock (read-only) - unimplemented */
#define LOCKFS_MAXLOCK  6       /* maximum lock number */

/*
 * lf_flags
 */
#define LOCKFS_BUSY     0x00000001      /* lock is being set */
#define LOCKFS_MOD      0x00000002      /* file system modified */

#define LOCKFS_MAXCOMMENTLEN    1024    /* maximum comment length */

/*
 * some nice checking macros
 */

#define LOCKFS_IS_BUSY(LF)      ((LF)->lf_flags & LOCKFS_BUSY)
#define LOCKFS_IS_MOD(LF)       ((LF)->lf_flags & LOCKFS_MOD)

#define LOCKFS_CLR_BUSY(LF)     ((LF)->lf_flags &= ~LOCKFS_BUSY)
#define LOCKFS_CLR_MOD(LF)      ((LF)->lf_flags &= ~LOCKFS_MOD)

#define LOCKFS_SET_MOD(LF)      ((LF)->lf_flags |= LOCKFS_MOD)
#define LOCKFS_SET_BUSY(LF)     ((LF)->lf_flags |= LOCKFS_BUSY)

#define LOCKFS_IS_WLOCK(LF)     ((LF)->lf_lock == LOCKFS_WLOCK)
#define LOCKFS_IS_HLOCK(LF)     ((LF)->lf_lock == LOCKFS_HLOCK)
#define LOCKFS_IS_ROELOCK(LF)   ((LF)->lf_lock == LOCKFS_ROELOCK)
#define LOCKFS_IS_ELOCK(LF)     ((LF)->lf_lock == LOCKFS_ELOCK)
#define LOCKFS_IS_ULOCK(LF)     ((LF)->lf_lock == LOCKFS_ULOCK)
#define LOCKFS_IS_NLOCK(LF)     ((LF)->lf_lock == LOCKFS_NLOCK)
#define LOCKFS_IS_DLOCK(LF)     ((LF)->lf_lock == LOCKFS_DLOCK)

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_LOCKFS_H */