FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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: releng/12.0/sys/fs/udf/udf.h 326268 2017-11-27 15:15:37Z pfg $
29 */
30
31 #define UDF_HASHTBLSIZE 100
32
33 struct udf_node {
34 struct vnode *i_vnode;
35 struct udf_mnt *udfmp;
36 ino_t hash_id;
37 long diroff;
38 struct file_entry *fentry;
39 };
40
41 struct udf_mnt {
42 int im_flags;
43 struct mount *im_mountp;
44 struct g_consumer *im_cp;
45 struct bufobj *im_bo;
46 struct cdev *im_dev;
47 struct vnode *im_devvp;
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 long_ad root_icb;
55 int p_sectors;
56 int s_table_entries;
57 struct udf_sparing_table *s_table;
58 void *im_d2l; /* disk->local iconv handle */
59 #if 0
60 void *im_l2d; /* local->disk iconv handle */
61 #endif
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 struct ifid {
80 u_short ifid_len;
81 u_short ifid_pad;
82 int ifid_ino;
83 long ifid_start;
84 };
85
86 #define VFSTOUDFFS(mp) ((struct udf_mnt *)((mp)->mnt_data))
87 #define VTON(vp) ((struct udf_node *)((vp)->v_data))
88
89 /*
90 * The block layer refers to things in terms of 512 byte blocks by default.
91 * btodb() is expensive, so speed things up.
92 * XXX Can the block layer be forced to use a different block size?
93 */
94 #define RDSECTOR(devvp, sector, size, bp) \
95 bread(devvp, sector << (udfmp->bshift - DEV_BSHIFT), size, NOCRED, bp)
96
97 MALLOC_DECLARE(M_UDFFENTRY);
98
99 static __inline int
100 udf_readdevblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
101 {
102 return (RDSECTOR(udfmp->im_devvp, sector,
103 (size + udfmp->bmask) & ~udfmp->bmask, bp));
104 }
105
106 /*
107 * Produce a suitable file number from an ICB. The passed in ICB is expected
108 * to be in little endian (meaning that it hasn't been swapped for big
109 * endian machines yet).
110 * XXX If the fileno resolves to 0, we might be in big trouble.
111 * XXX Assumes the ICB is a long_ad. This struct is compatible with short_ad,
112 * but not ext_ad.
113 */
114 static __inline ino_t
115 udf_getid(struct long_ad *icb)
116 {
117 return (le32toh(icb->loc.lb_num));
118 }
119
120 int udf_allocv(struct mount *, struct vnode **, struct thread *);
121 int udf_checktag(struct desc_tag *, uint16_t);
122 int udf_vget(struct mount *, ino_t, int, struct vnode **);
123
124 extern uma_zone_t udf_zone_trans;
125 extern uma_zone_t udf_zone_node;
126 extern uma_zone_t udf_zone_ds;
127
128 extern struct vop_vector udf_fifoops;
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