include/sys/lockfs.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_LOCKFS_H
  28 #define _SYS_LOCKFS_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #ifdef _SYSCALL32
  37 /*
  38  * ILP32 version of lockfs, used in ufs_ioctl() to support 32-bit app in
  39  * LP64 kernel
  40  */
  41 struct lockfs32 {
  42         uint32_t        lf_lock;        /* desired lock */
  43         uint32_t        lf_flags;       /* misc flags */
  44         uint32_t        lf_key;         /* lock key */
  45         uint32_t        lf_comlen;      /* length of comment */
  46         uint32_t        lf_comment;     /* address of comment */
  47 };
  48 #endif /* _SYSCALL32 */
  49
  50 struct lockfs {
  51         ulong_t         lf_lock;        /* desired lock */
  52         ulong_t         lf_flags;       /* misc flags */
  53         ulong_t         lf_key;         /* lock key */
  54         ulong_t         lf_comlen;      /* length of comment */
  55         caddr_t         lf_comment;     /* address of comment */
  56 };
  57
  58 /*
  59  * lf_lock and lf_locking
  60  */
  61 #define LOCKFS_ULOCK    0       /* unlock */
  62 #define LOCKFS_WLOCK    1       /* write  lock */
  63 #define LOCKFS_NLOCK    2       /* name   lock */
  64 #define LOCKFS_DLOCK    3       /* delete lock */
  65 #define LOCKFS_HLOCK    4       /* hard   lock */
  66 #define LOCKFS_ELOCK    5       /* error  lock */
  67 #define LOCKFS_ROELOCK  6       /* error  lock (read-only) - unimplemented */
  68 #define LOCKFS_MAXLOCK  6       /* maximum lock number */
  69
  70 /*
  71  * lf_flags
  72  */
  73 #define LOCKFS_BUSY     0x00000001      /* lock is being set */
  74 #define LOCKFS_MOD      0x00000002      /* file system modified */
  75
  76 #define LOCKFS_MAXCOMMENTLEN    1024    /* maximum comment length */
  77
  78 /*
  79  * some nice checking macros
  80  */
  81
  82 #define LOCKFS_IS_BUSY(LF)      ((LF)->lf_flags & LOCKFS_BUSY)
  83 #define LOCKFS_IS_MOD(LF)       ((LF)->lf_flags & LOCKFS_MOD)
  84
  85 #define LOCKFS_CLR_BUSY(LF)     ((LF)->lf_flags &= ~LOCKFS_BUSY)
  86 #define LOCKFS_CLR_MOD(LF)      ((LF)->lf_flags &= ~LOCKFS_MOD)
  87
  88 #define LOCKFS_SET_MOD(LF)      ((LF)->lf_flags |= LOCKFS_MOD)
  89 #define LOCKFS_SET_BUSY(LF)     ((LF)->lf_flags |= LOCKFS_BUSY)
  90
  91 #define LOCKFS_IS_WLOCK(LF)     ((LF)->lf_lock == LOCKFS_WLOCK)
  92 #define LOCKFS_IS_HLOCK(LF)     ((LF)->lf_lock == LOCKFS_HLOCK)
  93 #define LOCKFS_IS_ROELOCK(LF)   ((LF)->lf_lock == LOCKFS_ROELOCK)
  94 #define LOCKFS_IS_ELOCK(LF)     ((LF)->lf_lock == LOCKFS_ELOCK)
  95 #define LOCKFS_IS_ULOCK(LF)     ((LF)->lf_lock == LOCKFS_ULOCK)
  96 #define LOCKFS_IS_NLOCK(LF)     ((LF)->lf_lock == LOCKFS_NLOCK)
  97 #define LOCKFS_IS_DLOCK(LF)     ((LF)->lf_lock == LOCKFS_DLOCK)
  98
  99 #ifdef  __cplusplus
 100 }
 101 #endif
 102
 103 #endif  /* _SYS_LOCKFS_H */