xref: /illumos-gate/usr/src/uts/common/sys/extdirent.h (revision b819cea2f73f98c5662230cc9affc8cc84f77fcf)
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) || defined(_FAKE_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 VOP_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 */
78