1 /* $OpenBSD: udf.h,v 1.11 2006/07/12 14:26:44 pedro Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/fs/udf/udf.h,v 1.9 2004/10/29 10:40:58 phk Exp $
29 */
30
31 /*
32 * Ported to OpenBSD by Pedro Martelletto <pedro@openbsd.org> in February 2005.
33 */
34
35 #define UDF_HASHTBLSIZE 100
36
37 struct unode {
38 LIST_ENTRY(unode) u_le;
39 struct vnode *u_vnode;
40 struct vnode *u_devvp;
41 struct umount *u_ump;
42 struct lock u_lock;
43 dev_t u_dev;
44 ino_t u_ino;
45 union {
46 long u_diroff;
47 long u_vatlen;
48 } un_u;
49 struct file_entry *u_fentry;
50 };
51
52 #define u_diroff un_u.u_diroff
53 #define u_vatlen un_u.u_vatlen
54
55 struct umount {
56 int um_flags;
57 struct mount *um_mountp;
58 struct vnode *um_devvp;
59 dev_t um_dev;
60 int um_bsize;
61 int um_bshift;
62 int um_bmask;
63 uint32_t um_start;
64 uint32_t um_len;
65 struct unode *um_vat;
66 struct long_ad um_root_icb;
67 LIST_HEAD(udf_hash_lh, unode) *um_hashtbl;
68 u_long um_hashsz;
69 struct mutex um_hashmtx;
70 int um_psecs;
71 int um_stbl_len;
72 struct udf_sparing_table *um_stbl;
73 };
74
75 #define UDF_MNT_FIND_VAT 0x01 /* Indicates a VAT must be found */
76 #define UDF_MNT_USES_VAT 0x02 /* Indicates a VAT must be used */
77
78 struct udf_dirstream {
79 struct unode *node;
80 struct umount *ump;
81 struct buf *bp;
82 uint8_t *data;
83 uint8_t *buf;
84 int fsize;
85 int off;
86 int this_off;
87 int offset;
88 int size;
89 int error;
90 int fid_fragment;
91 };
92
93 #define VFSTOUDFFS(mp) ((struct umount *)((mp)->mnt_data))
94 #define VTOU(vp) ((struct unode *)((vp)->v_data))
95
96 /*
97 * The block layer refers to things in terms of 512 byte blocks by default.
98 * btodb() is expensive, so speed things up.
99 * Can the block layer be forced to use a different block size?
100 */
101 #define RDSECTOR(devvp, sector, size, bp) \
102 bread(devvp, sector << (ump->um_bshift - DEV_BSHIFT), size, NOCRED, bp)
103
104 static __inline int
105 udf_readlblks(struct umount *ump, int sector, int size, struct buf **bp)
106 {
107 return (RDSECTOR(ump->um_devvp, sector,
108 (size + ump->um_bmask) & ~ump->um_bmask, bp));
109 }
110
111 /*
112 * Produce a suitable file number from an ICB. The passed in ICB is expected
113 * to be in little endian (meaning that it hasn't been swapped for big
114 * endian machines yet).
115 * If the fileno resolves to 0, we might be in big trouble.
116 * Assumes the ICB is a long_ad. This struct is compatible with short_ad,
117 * but not ext_ad.
118 */
119 static __inline ino_t
120 udf_getid(struct long_ad *icb)
121 {
122 return (letoh32(icb->loc.lb_num));
123 }
124
125 int udf_allocv(struct mount *, struct vnode **, struct proc *);
126 int udf_hashlookup(struct umount *, ino_t, int, struct vnode **);
127 int udf_hashins(struct unode *);
128 int udf_hashrem(struct unode *);
129 int udf_checktag(struct desc_tag *, uint16_t);
130
131 typedef uint16_t unicode_t;