xref: /titanic_41/usr/src/grub/grub-0.97/stage2/disk_inode.h (revision 1b8adde7ba7d5e04395c141c5400dc2cffd7d809)
1 /*
2  * Mach Operating System
3  * Copyright (c) 1991,1990 Carnegie Mellon University
4  * All Rights Reserved.
5  *
6  * Permission to use, copy, modify and distribute this software and its
7  * documentation is hereby granted, provided that both the copyright
8  * notice and this permission notice appear in all copies of the
9  * software, derivative works or modified versions, and any portions
10  * thereof, and that both notices appear in supporting documentation.
11  *
12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15  *
16  * Carnegie Mellon requests users of this software to return to
17  *
18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19  *  School of Computer Science
20  *  Carnegie Mellon University
21  *  Pittsburgh PA 15213-3890
22  *
23  * any improvements or extensions that they make and grant Carnegie Mellon
24  * the rights to redistribute these changes.
25  */
26 /*
27  * Copyright (c) 1982, 1989 The Regents of the University of California.
28  * All rights reserved.
29  *
30  * Redistribution and use in source and binary forms are permitted
31  * provided that the above copyright notice and this paragraph are
32  * duplicated in all such forms and that any documentation,
33  * advertising materials, and other materials related to such
34  * distribution and use acknowledge that the software was developed
35  * by the University of California, Berkeley.  The name of the
36  * University may not be used to endorse or promote products derived
37  * from this software without specific prior written permission.
38  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
39  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
40  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
41  *
42  *	@(#)inode.h	7.5 (Berkeley) 7/3/89
43  */
44 
45 #ifndef	_BOOT_UFS_DISK_INODE_H_
46 #define	_BOOT_UFS_DISK_INODE_H_
47 
48 /*
49  * The I node is the focus of all file activity in the BSD Fast File System.
50  * There is a unique inode allocated for each active file,
51  * each current directory, each mounted-on file, text file, and the root.
52  * An inode is 'named' by its dev/inumber pair. (iget/iget.c)
53  * Data in icommon is read in from permanent inode on volume.
54  */
55 
56 #define	FFS_NDADDR	12	/* direct addresses in inode */
57 #define	FFS_NIADDR	3	/* indirect addresses in inode */
58 
59 #define	FFS_MAX_FASTLINK_SIZE	((FFS_NDADDR + FFS_NIADDR) \
60 				 * sizeof (mach_daddr_t))
61 
62 struct icommon
63   {
64     u_short ic_mode;		/*  0: mode and type of file */
65     short ic_nlink;		/*  2: number of links to file */
66     mach_uid_t ic_uid;		/*  4: owner's user id */
67     mach_gid_t ic_gid;		/*  6: owner's group id */
68     quad ic_size;		/*  8: number of bytes in file */
69     mach_time_t ic_atime;	/* 16: time last accessed */
70     int ic_atspare;
71     mach_time_t ic_mtime;	/* 24: time last modified */
72     int ic_mtspare;
73     mach_time_t ic_ctime;	/* 32: last time inode changed */
74     int ic_ctspare;
75     union
76       {
77 	struct
78 	  {
79 	    mach_daddr_t Mb_db[FFS_NDADDR];	/* 40: disk block addresses */
80 	    mach_daddr_t Mb_ib[FFS_NIADDR];	/* 88: indirect blocks */
81 	  }
82 	ic_Mb;
83 	char ic_Msymlink[FFS_MAX_FASTLINK_SIZE];
84 	/* 40: symbolic link name */
85       }
86     ic_Mun;
87 #define	ic_db		ic_Mun.ic_Mb.Mb_db
88 #define	ic_ib		ic_Mun.ic_Mb.Mb_ib
89 #define	ic_symlink	ic_Mun.ic_Msymlink
90     int ic_flags;		/* 100: status, currently unused */
91     int ic_blocks;		/* 104: blocks actually held */
92     int ic_gen;			/* 108: generation number */
93     int ic_spare[4];		/* 112: reserved, currently unused */
94   };
95 
96 /*
97  *	Same structure, but on disk.
98  */
99 struct dinode
100   {
101     union
102       {
103 	struct icommon di_com;
104 	char di_char[128];
105       }
106     di_un;
107   };
108 #define	di_ic	di_un.di_com
109 
110 #endif /* _BOOT_UFS_DISK_INODE_H_ */
111