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: src/sys/fs/udf/udf.h,v 1.6 2003/11/05 06:56:08 scottl Exp $
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 cdev_t 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 cdev_t im_dev;
46 struct vnode *im_devvp;
47 struct netexport im_export;
48 int bsize;
49 int bshift;
50 int bmask;
51 uint32_t part_start;
52 uint32_t part_len;
53 uint64_t root_id;
54 struct vnode *root_vp;
55 struct long_ad root_icb;
56 LIST_HEAD(udf_hash_lh, udf_node) *hashtbl;
57 u_long hashsz;
58 struct lwkt_token hash_token;
59 int p_sectors;
60 int s_table_entries;
61 struct udf_sparing_table *s_table;
62 };
63
64 struct udf_dirstream {
65 struct udf_node *node;
66 struct udf_mnt *udfmp;
67 struct buf *bp;
68 uint8_t *data;
69 uint8_t *buf;
70 int fsize;
71 int off;
72 int this_off;
73 int offset;
74 int size;
75 int error;
76 int fid_fragment;
77 };
78
79 #define VFSTOUDFFS(mp) ((struct udf_mnt *)((mp)->mnt_data))
80 #define VTON(vp) ((struct udf_node *)((vp)->v_data))
81
82 /*
83 * The block layer refers to things in terms of 512 byte blocks by default.
84 * btodb() is expensive, so speed things up.
85 * XXX Can the block layer be forced to use a different block size?
86 */
87 #define RDSECTOR(devvp, sector, size, bp) \
88 bread(devvp, (off_t)(sector) << udfmp->bshift, size, bp)
89
90 #ifdef MALLOC_DECLARE
91 MALLOC_DECLARE(M_UDFFENTRY);
92 MALLOC_DECLARE(M_UDFNODE);
93 #endif
94
95 static __inline int
udf_readlblks(struct udf_mnt * udfmp,int sector,int size,struct buf ** bp)96 udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
97 {
98 return (RDSECTOR(udfmp->im_devvp, sector,
99 (size + udfmp->bmask) & ~udfmp->bmask, bp));
100 }
101
102 static __inline int
udf_readalblks(struct udf_mnt * udfmp,int lsector,int size,struct buf ** bp)103 udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
104 {
105 off_t raoffset;
106 off_t loffset;
107 int rasize;
108
109 loffset = (off_t)(lsector + udfmp->part_start) << udfmp->bshift;
110 raoffset = loffset + (1 << udfmp->bshift);
111 rasize = size;
112
113 return (breadn(udfmp->im_devvp, loffset,
114 (size + udfmp->bmask) & ~udfmp->bmask,
115 &raoffset, &rasize, 1, bp));
116 }
117
118 /*
119 * Produce a suitable file number from an ICB.
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
udf_getid(struct long_ad * icb)125 udf_getid(struct long_ad *icb)
126 {
127 return (icb->loc.lb_num);
128 }
129
130 int udf_allocv(struct mount *, struct vnode **);
131 int udf_hashlookup(struct udf_mnt *, ino_t, 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 *, struct vnode *, ino_t, struct vnode **);
136