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 * $FreeBSD$
27 */
28
29 #define UDF_HASHTBLSIZE 100
30
31 struct udf_node {
32 LIST_ENTRY(udf_node) le;
33 struct vnode *i_vnode;
34 struct vnode *i_devvp;
35 struct udf_mnt *udfmp;
36 struct cdev *i_dev;
37 ino_t hash_id;
38 long diroff;
39 struct file_entry *fentry;
40 };
41
42 struct udf_mnt {
43 int im_flags;
44 struct mount *im_mountp;
45 struct cdev *im_dev;
46 struct vnode *im_devvp;
47 int bsize;
48 int bshift;
49 int bmask;
50 uint32_t part_start;
51 uint32_t part_len;
52 uint64_t root_id;
53 struct long_ad root_icb;
54 LIST_HEAD(udf_hash_lh, udf_node) *hashtbl;
55 u_long hashsz;
56 struct mtx hash_mtx;
57 int p_sectors;
58 int s_table_entries;
59 struct udf_sparing_table *s_table;
60 void *im_d2l; /* disk->local iconv handle */
61 #if 0
62 void *im_l2d; /* local->disk iconv handle */
63 #endif
64 };
65
66 struct udf_dirstream {
67 struct udf_node *node;
68 struct udf_mnt *udfmp;
69 struct buf *bp;
70 uint8_t *data;
71 uint8_t *buf;
72 int fsize;
73 int off;
74 int this_off;
75 int offset;
76 int size;
77 int error;
78 int fid_fragment;
79 };
80
81 #define VFSTOUDFFS(mp) ((struct udf_mnt *)((mp)->mnt_data))
82 #define VTON(vp) ((struct udf_node *)((vp)->v_data))
83
84 /*
85 * The block layer refers to things in terms of 512 byte blocks by default.
86 * btodb() is expensive, so speed things up.
87 * XXX Can the block layer be forced to use a different block size?
88 */
89 #define RDSECTOR(devvp, sector, size, bp) \
90 bread(devvp, sector << (udfmp->bshift - DEV_BSHIFT), size, NOCRED, bp)
91
92 MALLOC_DECLARE(M_UDFFENTRY);
93
94 static __inline int
95 udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
96 {
97 return (RDSECTOR(udfmp->im_devvp, sector,
98 (size + udfmp->bmask) & ~udfmp->bmask, bp));
99 }
100
101 static __inline int
102 udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
103 {
104 daddr_t rablock, lblk;
105 int rasize;
106
107 lblk = (lsector + udfmp->part_start) << (udfmp->bshift - DEV_BSHIFT);
108 rablock = (lblk + 1) << udfmp->bshift;
109 rasize = size;
110
111 return (breadn(udfmp->im_devvp, lblk,
112 (size + udfmp->bmask) & ~udfmp->bmask,
113 &rablock, &rasize, 1, NOCRED, bp));
114 }
115
116 /*
117 * Produce a suitable file number from an ICB. The passed in ICB is expected
118 * to be in little endian (meaning that it hasn't been swapped for big
119 * endian machines yet).
120 * XXX If the fileno resolves to 0, we might be in big trouble.
121 * XXX Assumes the ICB is a long_ad. This struct is compatible with short_ad,
122 * but not ext_ad.
123 */
124 static __inline ino_t
125 udf_getid(struct long_ad *icb)
126 {
127 return (le32toh(icb->loc.lb_num));
128 }
129
130 int udf_allocv(struct mount *, struct vnode **, struct thread *);
131 int udf_hashlookup(struct udf_mnt *, ino_t, int, struct vnode **);
132 int udf_hashins(struct udf_node *);
133 int udf_hashrem(struct udf_node *);
134 int udf_checktag(struct desc_tag *, uint16_t);
135 int udf_vget(struct mount *, ino_t, int, struct vnode **);
136
137 extern uma_zone_t udf_zone_trans;
138 extern uma_zone_t udf_zone_node;
139 extern uma_zone_t udf_zone_ds;
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