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Diffstat (limited to 'serverboot/disk_inode.h')
| -rw-r--r-- | serverboot/disk_inode.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/serverboot/disk_inode.h b/serverboot/disk_inode.h new file mode 100644 index 00000000..e0f49ea3 --- /dev/null +++ b/serverboot/disk_inode.h @@ -0,0 +1,101 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * Copyright (c) 1982, 1989 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * @(#)inode.h 7.5 (Berkeley) 7/3/89 + */ + +#ifndef _BOOT_UFS_DISK_INODE_H_ +#define _BOOT_UFS_DISK_INODE_H_ + +/* + * The I node is the focus of all file activity in the BSD Fast File System. + * There is a unique inode allocated for each active file, + * each current directory, each mounted-on file, text file, and the root. + * An inode is 'named' by its dev/inumber pair. (iget/iget.c) + * Data in icommon is read in from permanent inode on volume. + */ + +#define FFS_NDADDR 12 /* direct addresses in inode */ +#define FFS_NIADDR 3 /* indirect addresses in inode */ + +#define FFS_MAX_FASTLINK_SIZE ((FFS_NDADDR + FFS_NIADDR) * sizeof(daddr_t)) + +struct icommon { + u_short ic_mode; /* 0: mode and type of file */ + short ic_nlink; /* 2: number of links to file */ + uid_t ic_uid; /* 4: owner's user id */ + gid_t ic_gid; /* 6: owner's group id */ + quad ic_size; /* 8: number of bytes in file */ + time_t ic_atime; /* 16: time last accessed */ + int ic_atspare; + time_t ic_mtime; /* 24: time last modified */ + int ic_mtspare; + time_t ic_ctime; /* 32: last time inode changed */ + int ic_ctspare; + union { + struct { + daddr_t Mb_db[FFS_NDADDR]; /* 40: disk block addresses */ + daddr_t Mb_ib[FFS_NIADDR]; /* 88: indirect blocks */ + } ic_Mb; + char ic_Msymlink[FFS_MAX_FASTLINK_SIZE]; + /* 40: symbolic link name */ + } ic_Mun; +#define ic_db ic_Mun.ic_Mb.Mb_db +#define ic_ib ic_Mun.ic_Mb.Mb_ib +#define ic_symlink ic_Mun.ic_Msymlink + int ic_flags; /* 100: status, currently unused */ + int ic_blocks; /* 104: blocks actually held */ + int ic_gen; /* 108: generation number */ + int ic_spare[4]; /* 112: reserved, currently unused */ +} i_ic; + +/* + * Same structure, but on disk. + */ +struct dinode { + union { + struct icommon di_com; + char di_char[128]; + } di_un; +}; +#define di_ic di_un.di_com + +#endif /* _BOOT_UFS_DISK_INODE_H_ */ |