include/sys/extdirent.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  *
  25  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  26  */
  27
  28 #ifndef _SYS_EXTDIRENT_H
  29 #define _SYS_EXTDIRENT_H
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include <sys/types.h>
  36
  37 #if defined(_KERNEL)
  38
  39 /*
  40  * Extended file-system independent directory entry.  This style of
  41  * dirent provides additional informational flag bits for each
  42  * directory entry.  This dirent will be returned instead of the
  43  * standard dirent if a fop_readdir() requests dirent flags via
  44  * V_RDDIR_ENTFLAGS, and if the file system supports the flags.
  45  */
  46 typedef struct edirent {
  47         ino64_t         ed_ino;         /* "inode number" of entry */
  48         off64_t         ed_off;         /* offset of disk directory entry */
  49         uint32_t        ed_eflags;      /* per-entry flags */
  50         unsigned short  ed_reclen;      /* length of this record */
  51         char            ed_name[1];     /* name of file */
  52 } edirent_t;
  53
  54 #define EDIRENT_RECLEN(namelen) \
  55         ((offsetof(edirent_t, ed_name[0]) + 1 + (namelen) + 7) & ~ 7)
  56 #define EDIRENT_NAMELEN(reclen) \
  57         ((reclen) - (offsetof(edirent_t, ed_name[0])))
  58
  59 /*
  60  * Extended entry flags
  61  *      Extended entries include a bitfield of extra information
  62  *      regarding that entry.
  63  */
  64 #define ED_CASE_CONFLICT  0x10  /* Disconsidering case, entry is not unique */
  65
  66 /*
  67  * Extended flags accessor function
  68  */
  69 #define ED_CASE_CONFLICTS(x)    ((x)->ed_eflags & ED_CASE_CONFLICT)
  70
  71 #endif /* defined(_KERNEL) */
  72
  73 #ifdef  __cplusplus
  74 }
  75 #endif
  76
  77 #endif  /* _SYS_EXTDIRENT_H */