1/*	$NetBSD: dtfs.h,v 1.2 2010/07/14 13:09:52 pooka Exp $	*/
2
3/*
4 * Copyright (c) 2006  Antti Kantee.  All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef DTFS_H_
29#define DTFS_H_
30
31#include <sys/types.h>
32
33#include <puffs.h>
34
35PUFFSOP_PROTOS(dtfs);
36int	dtfs_domount(struct puffs_usermount *, const char *);
37
38#define DTFS_BLOCKSHIFT	(12)
39#define DTFS_BLOCKSIZE	(1<<DTFS_BLOCKSHIFT)
40
41#define ROUNDUP(a,b) ((a) & ((b)-1))
42#define BLOCKNUM(a,b) (((a) & ~((1<<(b))-1)) >> (b))
43
44struct dtfs_fid;
45struct dtfs_mount {
46	ino_t		dtm_nextfileid;	/* running number for file id	*/
47
48	size_t		dtm_fsizes;	/* sum of file sizes in bytes	*/
49	fsfilcnt_t	dtm_nfiles;	/* number of files		*/
50
51	LIST_HEAD(, dtfs_poll) dtm_pollent;
52	int		dtm_needwakeup;
53	vm_prot_t	dtm_allowprot;
54};
55
56struct dtfs_file {
57	union {
58		struct {
59			uint8_t **blocks;
60			size_t numblocks;
61			size_t datalen;
62		} reg;
63		struct {
64			struct puffs_node *dotdot;
65			LIST_HEAD(, dtfs_dirent) dirents;
66		} dir;
67		struct {
68			char *target;
69		} link;
70	} u;
71#define df_blocks u.reg.blocks
72#define df_numblocks u.reg.numblocks
73#define df_datalen u.reg.datalen
74#define df_dotdot u.dir.dotdot
75#define df_dirents u.dir.dirents
76#define df_linktarget u.link.target
77};
78
79struct dtfs_dirent {
80	struct puffs_node *dfd_node;
81	struct puffs_node *dfd_parent;
82	char *dfd_name;
83	size_t dfd_namelen;
84
85	LIST_ENTRY(dtfs_dirent) dfd_entries;
86};
87
88struct dtfs_fid {
89	struct puffs_node	*dfid_addr;
90
91	/* best^Wsome-effort extra sanity check */
92	ino_t			dfid_fileid;
93	u_long			dfid_gen;
94};
95#define DTFS_FIDSIZE (sizeof(struct dtfs_fid))
96
97struct dtfs_poll {
98	struct puffs_cc *dp_pcc;
99	LIST_ENTRY(dtfs_poll) dp_entries;
100};
101
102struct puffs_node *	dtfs_genfile(struct puffs_node *,
103				     const struct puffs_cn *, enum vtype);
104struct dtfs_file *	dtfs_newdir(void);
105struct dtfs_file *	dtfs_newfile(void);
106struct dtfs_dirent *	dtfs_dirgetnth(struct dtfs_file *, int);
107struct dtfs_dirent *	dtfs_dirgetbyname(struct dtfs_file *,
108					  const char *, size_t);
109
110void			dtfs_nukenode(struct puffs_node *, struct puffs_node *,
111				      const char *, size_t);
112void			dtfs_freenode(struct puffs_node *);
113void			dtfs_setsize(struct puffs_node *, off_t);
114
115void	dtfs_adddent(struct puffs_node *, struct dtfs_dirent *);
116void	dtfs_removedent(struct puffs_node *, struct dtfs_dirent *);
117
118void	dtfs_baseattrs(struct vattr *, enum vtype, ino_t);
119void	dtfs_updatetimes(struct puffs_node *, int, int, int);
120
121bool	dtfs_isunder(struct puffs_node *, struct puffs_node *);
122
123
124#define DTFS_CTOF(a) ((struct dtfs_file *)(((struct puffs_node *)a)->pn_data))
125#define DTFS_PTOF(a) ((struct dtfs_file *)(a->pn_data))
126
127#endif /* DTFS_H_ */
128