1 /* $FreeBSD: releng/5.0/sys/fs/msdosfs/msdosfsmount.h 96755 2002-05-16 21:28:32Z trhodes $ */
2 /* $NetBSD: msdosfsmount.h,v 1.17 1997/11/17 15:37:07 ws Exp $ */
3
4 /*-
5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
7 * All rights reserved.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by TooLs GmbH.
21 * 4. The name of TooLs GmbH may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 /*
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
37 *
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
40 *
41 * This software is provided "as is".
42 *
43 * The author supplies this software to be publicly redistributed on the
44 * understanding that the author is not responsible for the correct
45 * functioning of this software in any circumstances and is not liable for
46 * any damages caused by this software.
47 *
48 * October 1992
49 */
50
51 #ifndef _MSDOSFS_MSDOSFSMOUNT_H_
52 #define _MSDOSFS_MSDOSFSMOUNT_H_
53
54 #ifdef _KERNEL
55
56 #ifdef MALLOC_DECLARE
57 MALLOC_DECLARE(M_MSDOSFSMNT);
58 #endif
59
60 /*
61 * Layout of the mount control block for a msdos filesystem.
62 */
63 struct msdosfsmount {
64 struct mount *pm_mountp;/* vfs mount struct for this fs */
65 dev_t pm_dev; /* block special device mounted */
66 uid_t pm_uid; /* uid to set as owner of the files */
67 gid_t pm_gid; /* gid to set as owner of the files */
68 mode_t pm_mask; /* mask to and with file protection bits */
69 struct vnode *pm_devvp; /* vnode for block device mntd */
70 struct bpb50 pm_bpb; /* BIOS parameter blk for this fs */
71 u_long pm_BlkPerSec; /* How many DEV_BSIZE blocks fit inside a physical sector */
72 u_long pm_FATsecs; /* actual number of fat sectors */
73 u_long pm_fatblk; /* block # of first FAT */
74 u_long pm_rootdirblk; /* block # (cluster # for FAT32) of root directory number */
75 u_long pm_rootdirsize; /* size in blocks (not clusters) */
76 u_long pm_firstcluster; /* block number of first cluster */
77 u_long pm_maxcluster; /* maximum cluster number */
78 u_long pm_freeclustercount; /* number of free clusters */
79 u_long pm_cnshift; /* shift file offset right this amount to get a cluster number */
80 u_long pm_crbomask; /* and a file offset with this mask to get cluster rel offset */
81 u_long pm_bnshift; /* shift file offset right this amount to get a block number */
82 u_long pm_bpcluster; /* bytes per cluster */
83 u_long pm_fmod; /* ~0 if fs is modified, this can rollover to 0 */
84 u_long pm_fatblocksize; /* size of fat blocks in bytes */
85 u_long pm_fatblocksec; /* size of fat blocks in sectors */
86 u_long pm_fatsize; /* size of fat in bytes */
87 u_int32_t pm_fatmask; /* mask to use for fat numbers */
88 u_long pm_fsinfo; /* fsinfo block number */
89 u_long pm_nxtfree; /* next free cluster in fsinfo block */
90 u_int pm_fatmult; /* these 2 values are used in fat */
91 u_int pm_fatdiv; /* offset computation */
92 u_int pm_curfat; /* current fat for FAT32 (0 otherwise) */
93 u_int *pm_inusemap; /* ptr to bitmap of in-use clusters */
94 u_int pm_flags; /* see below */
95 u_int16_t pm_u2w[128]; /* Local->Unicode table */
96 u_int8_t pm_ul[128]; /* Local upper->lower table */
97 u_int8_t pm_lu[128]; /* Local lower->upper table */
98 u_int8_t pm_d2u[128]; /* DOS->local table */
99 u_int8_t pm_u2d[128]; /* Local->DOS table */
100 };
101 /* Byte offset in FAT on filesystem pmp, cluster cn */
102 #define FATOFS(pmp, cn) ((cn) * (pmp)->pm_fatmult / (pmp)->pm_fatdiv)
103
104
105 #define VFSTOMSDOSFS(mp) ((struct msdosfsmount *)mp->mnt_data)
106
107 /* Number of bits in one pm_inusemap item: */
108 #define N_INUSEBITS (8 * sizeof(u_int))
109
110 /*
111 * Shorthand for fields in the bpb contained in the msdosfsmount structure.
112 */
113 #define pm_BytesPerSec pm_bpb.bpbBytesPerSec
114 #define pm_ResSectors pm_bpb.bpbResSectors
115 #define pm_FATs pm_bpb.bpbFATs
116 #define pm_RootDirEnts pm_bpb.bpbRootDirEnts
117 #define pm_Sectors pm_bpb.bpbSectors
118 #define pm_Media pm_bpb.bpbMedia
119 #define pm_SecPerTrack pm_bpb.bpbSecPerTrack
120 #define pm_Heads pm_bpb.bpbHeads
121 #define pm_HiddenSects pm_bpb.bpbHiddenSecs
122 #define pm_HugeSectors pm_bpb.bpbHugeSectors
123
124 /*
125 * Convert pointer to buffer -> pointer to direntry
126 */
127 #define bptoep(pmp, bp, dirofs) \
128 ((struct direntry *)(((bp)->b_data) \
129 + ((dirofs) & (pmp)->pm_crbomask)))
130
131 /*
132 * Convert block number to cluster number
133 */
134 #define de_bn2cn(pmp, bn) \
135 ((bn) >> ((pmp)->pm_cnshift - (pmp)->pm_bnshift))
136
137 /*
138 * Convert cluster number to block number
139 */
140 #define de_cn2bn(pmp, cn) \
141 ((cn) << ((pmp)->pm_cnshift - (pmp)->pm_bnshift))
142
143 /*
144 * Convert file offset to cluster number
145 */
146 #define de_cluster(pmp, off) \
147 ((off) >> (pmp)->pm_cnshift)
148
149 /*
150 * Clusters required to hold size bytes
151 */
152 #define de_clcount(pmp, size) \
153 (((size) + (pmp)->pm_bpcluster - 1) >> (pmp)->pm_cnshift)
154
155 /*
156 * Convert file offset to block number
157 */
158 #define de_blk(pmp, off) \
159 (de_cn2bn(pmp, de_cluster((pmp), (off))))
160
161 /*
162 * Convert cluster number to file offset
163 */
164 #define de_cn2off(pmp, cn) \
165 ((cn) << (pmp)->pm_cnshift)
166
167 /*
168 * Convert block number to file offset
169 */
170 #define de_bn2off(pmp, bn) \
171 ((bn) << (pmp)->pm_bnshift)
172 /*
173 * Map a cluster number into a filesystem relative block number.
174 */
175 #define cntobn(pmp, cn) \
176 (de_cn2bn((pmp), (cn)-CLUST_FIRST) + (pmp)->pm_firstcluster)
177
178 /*
179 * Calculate block number for directory entry in root dir, offset dirofs
180 */
181 #define roottobn(pmp, dirofs) \
182 (de_blk((pmp), (dirofs)) + (pmp)->pm_rootdirblk)
183
184 /*
185 * Calculate block number for directory entry at cluster dirclu, offset
186 * dirofs
187 */
188 #define detobn(pmp, dirclu, dirofs) \
189 ((dirclu) == MSDOSFSROOT \
190 ? roottobn((pmp), (dirofs)) \
191 : cntobn((pmp), (dirclu)))
192
193 /*
194 * Calculate fsinfo block size
195 */
196 #define fsi_size(pmp) \
197 (1024 << ((pmp)->pm_BlkPerSec >> 2))
198
199 int msdosfs_init(struct vfsconf *vfsp);
200 int msdosfs_uninit(struct vfsconf *vfsp);
201 int msdosfs_mountroot(void);
202
203 #endif /* _KERNEL */
204
205 /*
206 * Arguments to mount MSDOS filesystems.
207 */
208 struct msdosfs_args {
209 char *fspec; /* blocks special holding the fs to mount */
210 struct export_args export; /* network export information */
211 uid_t uid; /* uid that owns msdosfs files */
212 gid_t gid; /* gid that owns msdosfs files */
213 mode_t mask; /* mask to be applied for msdosfs perms */
214 int flags; /* see below */
215 int magic; /* version number */
216 u_int16_t u2w[128]; /* Local->Unicode table */
217 u_int8_t ul[128]; /* Local upper->lower table */
218 u_int8_t lu[128]; /* Local lower->upper table */
219 u_int8_t d2u[128]; /* DOS->local table */
220 u_int8_t u2d[128]; /* Local->DOS table */
221 };
222
223 /*
224 * Msdosfs mount options:
225 */
226 #define MSDOSFSMNT_SHORTNAME 1 /* Force old DOS short names only */
227 #define MSDOSFSMNT_LONGNAME 2 /* Force Win'95 long names */
228 #define MSDOSFSMNT_NOWIN95 4 /* Completely ignore Win95 entries */
229 #define MSDOSFSMNT_U2WTABLE 0x10 /* Local->Unicode and local<->DOS */
230 /* tables loaded */
231 #define MSDOSFSMNT_ULTABLE 0x20 /* Local upper<->lower table loaded */
232 /* All flags above: */
233 #define MSDOSFSMNT_MNTOPT \
234 (MSDOSFSMNT_SHORTNAME|MSDOSFSMNT_LONGNAME|MSDOSFSMNT_NOWIN95 \
235 |MSDOSFSMNT_U2WTABLE|MSDOSFSMNT_ULTABLE)
236 #define MSDOSFSMNT_RONLY 0x80000000 /* mounted read-only */
237 #define MSDOSFSMNT_WAITONFAT 0x40000000 /* mounted synchronous */
238 #define MSDOSFS_FATMIRROR 0x20000000 /* FAT is mirrored */
239
240 #define MSDOSFS_ARGSMAGIC 0xe4eff300
241
242 #endif /* !_MSDOSFS_MSDOSFSMOUNT_H_ */
Cache object: 22dd0d3ce38ef0f57991dab267d950ad
|