1/* $OpenBSD: fusefs.h,v 1.15 2025/09/08 17:25:46 helg Exp $ */
2/*
3 * Copyright (c) 2012-2013 Sylvestre Gallon <ccna.syl@gmail.com>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#ifndef __FUSEFS_H__
19#define __FUSEFS_H__
20
21/* sysctl defines */
22#define FUSEFS_OPENDEVS 1 /* # of fuse devices opened */
23#define FUSEFS_INFBUFS 2 /* # of in fbufs */
24#define FUSEFS_WAITFBUFS 3 /* # of fbufs waiting for a response */
25#define FUSEFS_POOL_NBPAGES 4 /* # total fusefs size */
26#define FUSEFS_MAXID 5 /* number of valid fusefs ids */
27
28#define FUSEFS_NAMES { \
29 { 0, 0}, \
30 { "fusefs_open_devices", CTLTYPE_INT }, \
31 { "fusefs_fbufs_in", CTLTYPE_INT }, \
32 { "fusefs_fbufs_wait", CTLTYPE_INT }, \
33 { "fusefs_pool_pages", CTLTYPE_INT }, \
34}
35
36#ifdef _KERNEL
37
38struct fuse_msg;
39
40struct fusefs_mnt {
41 struct mount *mp;
42 uint32_t undef_op;
43 int max_read;
44 int sess_init;
45 int allow_other;
46 dev_t dev;
47};
48
49#define UNDEF_ACCESS 1<<0
50#define UNDEF_MKDIR 1<<1
51#define UNDEF_CREATE 1<<2
52#define UNDEF_LINK 1<<3
53#define UNDEF_READLINK 1<<4
54#define UNDEF_RMDIR 1<<5
55#define UNDEF_REMOVE 1<<6
56#define UNDEF_SETATTR 1<<7
57#define UNDEF_RENAME 1<<8
58#define UNDEF_SYMLINK 1<<9
59#define UNDEF_MKNOD 1<<10
60#define UNDEF_FLUSH 1<<11
61#define UNDEF_FSYNC 1<<12
62
63extern const struct vops fusefs_vops;
64extern struct pool fusefs_fbuf_pool;
65
66/* files helpers. */
67int fusefs_file_open(struct fusefs_mnt *, struct fusefs_node *, enum fufh_type,
68 int, int, struct proc *);
69int fusefs_file_close(struct fusefs_mnt *, struct fusefs_node *,
70 enum fufh_type, int, int, struct proc *);
71
72/* device helpers. */
73void fuse_device_cleanup(dev_t);
74void fuse_device_queue_fbuf(dev_t, struct fusebuf *);
75void fuse_device_set_fmp(struct fusefs_mnt *, int);
76
77/*
78 * The root inode is the root of the file system. Inode 0 can't be used for
79 * normal purposes.
80 */
81#define FUSE_ROOTINO ((ino_t)1)
82#define VFSTOFUSEFS(mp) ((struct fusefs_mnt *)((mp)->mnt_data))
83
84#endif /* _KERNEL */
85#endif /* __FUSEFS_H__ */