1/*	$OpenBSD: udf.h,v 1.21 2016/06/19 11:54:33 natano 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 in February 2005.
33 */
34
35#define UDF_HASHTBLSIZE 100
36
37typedef uint32_t udfino_t;
38
39struct unode {
40	LIST_ENTRY(unode) u_le;
41	struct vnode *u_vnode;
42	struct vnode *u_devvp;
43	struct umount *u_ump;
44	struct rrwlock u_lock;
45	dev_t u_dev;
46	udfino_t u_ino;
47	union {
48		long u_diroff;
49		long u_vatlen;
50	} un_u;
51	struct extfile_entry *u_fentry;
52};
53
54#define	u_diroff	un_u.u_diroff
55#define	u_vatlen	un_u.u_vatlen
56
57struct umount {
58	int um_flags;
59	struct mount *um_mountp;
60	struct vnode *um_devvp;
61	dev_t um_dev;
62	int um_bsize;
63	int um_bshift;
64	int um_bmask;
65	uint32_t um_start;
66	uint32_t um_realstart;
67	uint32_t um_len;
68	uint32_t um_reallen;
69	uint32_t um_meta_start;
70	uint32_t um_meta_len;
71	struct unode *um_vat;
72	struct long_ad um_root_icb;
73	LIST_HEAD(udf_hash_lh, unode) *um_hashtbl;
74	SIPHASH_KEY um_hashkey;
75	u_long um_hashsz;
76	struct mutex um_hashmtx;
77	int um_psecs;
78	int um_stbl_len;
79	struct udf_sparing_table *um_stbl;
80};
81
82#define	UDF_MNT_FIND_VAT	0x01	/* Indicates a VAT must be found */
83#define	UDF_MNT_USES_VAT	0x02	/* Indicates a VAT must be used */
84#define	UDF_MNT_USES_META	0x04	/* Indicates we are using a Metadata partition*/
85
86#define	VTOU(vp)	((struct unode *)((vp)->v_data))
87
88#ifdef _KERNEL
89
90struct udf_dirstream {
91	struct unode	*node;
92	struct umount	*ump;
93	struct buf	*bp;
94	uint8_t		*data;
95	uint8_t		*buf;
96	int		fsize;
97	int		off;
98	int		this_off;
99	int		offset;
100	int		size;
101	int		error;
102	int		fid_fragment;
103};
104
105#define	VFSTOUDFFS(mp)	((struct umount *)((mp)->mnt_data))
106
107/*
108 * The block layer refers to things in terms of 512 byte blocks by default.
109 * btodb() is expensive, so speed things up.
110 * Can the block layer be forced to use a different block size?
111 */
112#define	RDSECTOR(devvp, sector, size, bp) \
113	bread(devvp, \
114		((daddr_t)(sector) << ump->um_bshift) / DEV_BSIZE, size, bp)
115
116static __inline int
117udf_readlblks(struct umount *ump, int sector, int size, struct buf **bp)
118{
119	return (RDSECTOR(ump->um_devvp, sector,
120			 (size + ump->um_bmask) & ~ump->um_bmask, bp));
121}
122
123/*
124 * Produce a suitable file number from an ICB.  The passed in ICB is expected
125 * to be in little endian (meaning that it hasn't been swapped for big
126 * endian machines yet).
127 * If the fileno resolves to 0, we might be in big trouble.
128 * Assumes the ICB is a long_ad.  This struct is compatible with short_ad,
129 *     but not ext_ad.
130 */
131static __inline udfino_t
132udf_getid(struct long_ad *icb)
133{
134	return (letoh32(icb->loc.lb_num));
135}
136
137int udf_allocv(struct mount *, struct vnode **, struct proc *);
138int udf_hashlookup(struct umount *, udfino_t, int, struct vnode **);
139int udf_hashins(struct unode *);
140int udf_hashrem(struct unode *);
141int udf_checktag(struct desc_tag *, uint16_t);
142
143typedef	uint16_t unicode_t;
144
145#endif /* _KERNEL */
146
147