FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf.h
1 /*-
2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/5.0/sys/fs/udf/udf.h 101890 2002-08-15 00:43:43Z scottl $
27 */
28
29 struct udf_node {
30 TAILQ_ENTRY(udf_node) tq;
31 struct vnode *i_vnode;
32 struct vnode *i_devvp;
33 struct udf_mnt *udfmp;
34 dev_t i_dev;
35 ino_t hash_id;
36 long diroff;
37 struct file_entry *fentry;
38 };
39
40 struct udf_mnt {
41 int im_flags;
42 struct mount *im_mountp;
43 dev_t im_dev;
44 struct vnode *im_devvp;
45 int bsize;
46 int bshift;
47 int bmask;
48 uint32_t part_start;
49 uint32_t part_len;
50 uint64_t root_id;
51 struct vnode *root_vp;
52 struct long_ad root_icb;
53 TAILQ_HEAD(, udf_node) udf_tqh;
54 struct mtx hash_mtx;
55 int p_sectors;
56 int s_table_entries;
57 struct udf_sparing_table *s_table;
58 };
59
60 struct udf_dirstream {
61 struct udf_node *node;
62 struct udf_mnt *udfmp;
63 struct buf *bp;
64 uint8_t *data;
65 uint8_t *buf;
66 int fsize;
67 int off;
68 int this_off;
69 int offset;
70 int size;
71 int error;
72 int fid_fragment;
73 };
74
75 #define VFSTOUDFFS(mp) ((struct udf_mnt *)((mp)->mnt_data))
76 #define VTON(vp) ((struct udf_node *)((vp)->v_data))
77
78 /*
79 * The block layer refers to things in terms of 512 byte blocks by default.
80 * btodb() is expensive, so speed things up.
81 * XXX Can the block layer be forced to use a different block size?
82 */
83 #define RDSECTOR(devvp, sector, size, bp) \
84 bread(devvp, sector << (udfmp->bshift - DEV_BSHIFT), size, NOCRED, bp)
85
86 MALLOC_DECLARE(M_UDFFENTRY);
87
88 static __inline int
89 udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
90 {
91 return (bread(udfmp->im_devvp, sector << (udfmp->bshift - DEV_BSHIFT),
92 (size + udfmp->bmask) & ~udfmp->bmask, NOCRED, bp));
93 }
94
95 static __inline int
96 udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
97 {
98 daddr_t rablock, lblk;
99 int rasize;
100
101 lblk = (lsector + udfmp->part_start) << (udfmp->bshift - DEV_BSHIFT);
102 rablock = (lblk + 1) << udfmp->bshift;
103 rasize = size;
104
105 return (breadn(udfmp->im_devvp, lblk,
106 (size + udfmp->bmask) & ~udfmp->bmask,
107 &rablock, &rasize, 1, NOCRED, bp));
108 }
109
110 /*
111 * Produce a suitable file number from an ICB.
112 * XXX If the fileno resolves to 0, we might be in big trouble.
113 * XXX Assumes the ICB is a long_ad. This struct is compatible with short_ad,
114 * but not ext_ad.
115 */
116 static ino_t
117 udf_getid(struct long_ad *icb)
118 {
119 return (icb->loc.lb_num);
120 }
121
122 int udf_allocv(struct mount *, struct vnode **, struct thread *);
123 int udf_hashlookup(struct udf_mnt *, ino_t, int, struct vnode **);
124 int udf_hashins(struct udf_node *);
125 int udf_hashrem(struct udf_node *);
126 int udf_checktag(struct desc_tag *, uint16_t);
127 int udf_vget(struct mount *, ino_t, int, struct vnode **);
128
129 extern uma_zone_t udf_zone_trans;
130 extern uma_zone_t udf_zone_node;
131 extern uma_zone_t udf_zone_ds;
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