![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to disk_label.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / bsd / dev|
Return to disk_label.h CVS log | Up to [Apple XNU] / XNU / bsd / dev |
1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1991 by NeXT Computer, Inc.
23: *
24: * File: bsd/dev/disk_label.h - NeXT disk label definition.
25: *
26: * HISTORY
27: * 28-Mar-92 Doug Mitchell at NeXT
28: * Split out from <bsd/dev/disk.h>.
29: */
30:
31: #ifndef _BSD_DEV_DISK_LABEL_
32: #define _BSD_DEV_DISK_LABEL_
33:
34: #include <sys/disktab.h>
35:
36: #define NLABELS 4 /* # of labels on a disk */
37: #define MAXLBLLEN 24 /* dl_label[] size */
38: #define NBAD 1670 /* sized to make label ~= 8KB */
39:
40: /*
41: * if dl_version >= DL_V3 then the bad block table is relocated
42: * to a structure separate from the disk label.
43: */
44: typedef union {
45: unsigned short DL_v3_checksum;
46: int DL_bad[NBAD]; /* block number that is bad */
47: } dl_un_t;
48:
49: typedef struct disk_label {
50: int dl_version; // label version number
51: int dl_label_blkno; // block # where this label is
52: int dl_size; // size of media area (sectors)
53: char dl_label[MAXLBLLEN]; // media label
54: unsigned dl_flags; // flags (see DL_xxx, below)
55: unsigned dl_tag; // volume tag
56: struct disktab dl_dt; // common info in disktab
57: dl_un_t dl_un;
58: unsigned short dl_checksum; // ones complement checksum
59:
60: /* add things here so dl_checksum stays in a fixed place */
61: } disk_label_t;
62:
63: /*
64: * Known label versions.
65: */
66: #define DL_V1 0x4e655854 /* version #1: "NeXT" */
67: #define DL_V2 0x646c5632 /* version #2: "dlV2" */
68: #define DL_V3 0x646c5633 /* version #3: "dlV3" */
69: #define DL_VERSION DL_V3 /* default version */
70:
71:
72: /*
73: * dl_flags values
74: */
75: #define DL_UNINIT 0x80000000 /* label is uninitialized */
76:
77: /*
78: * Aliases for disktab fields
79: */
80: #define dl_name dl_dt.d_name
81: #define dl_type dl_dt.d_type
82: #define dl_part dl_dt.d_partitions
83: #define dl_front dl_dt.d_front
84: #define dl_back dl_dt.d_back
85: #define dl_ngroups dl_dt.d_ngroups
86: #define dl_ag_size dl_dt.d_ag_size
87: #define dl_ag_alts dl_dt.d_ag_alts
88: #define dl_ag_off dl_dt.d_ag_off
89: #define dl_secsize dl_dt.d_secsize
90: #define dl_ncyl dl_dt.d_ncylinders
91: #define dl_nsect dl_dt.d_nsectors
92: #define dl_ntrack dl_dt.d_ntracks
93: #define dl_rpm dl_dt.d_rpm
94: #define dl_bootfile dl_dt.d_bootfile
95: #define dl_boot0_blkno dl_dt.d_boot0_blkno
96: #define dl_hostname dl_dt.d_hostname
97: #define dl_rootpartition dl_dt.d_rootpartition
98: #define dl_rwpartition dl_dt.d_rwpartition
99:
100: /*
101: * Other aliases
102: */
103: #define dl_v3_checksum dl_un.DL_v3_checksum
104: #define dl_bad dl_un.DL_bad
105:
106: #endif /* _BSD_DEV_DISK_LABEL_ */
107:
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.