fs.h revision 219820 
1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
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 unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef	_LINUX_FS_H_
29#define	_LINUX_FS_H_
30
31#include <sys/systm.h>
32#include <sys/conf.h>
33#include <sys/vnode.h>
34#include <sys/file.h>
35#include <sys/filedesc.h>
36#include <linux/types.h>
37#include <linux/wait.h>
38#include <linux/semaphore.h>
39
40struct module;
41struct kiocb;
42struct iovec;
43struct dentry;
44struct page;
45struct file_lock;
46struct pipe_inode_info;
47struct vm_area_struct;
48struct poll_table_struct;
49struct files_struct;
50
51#define	inode	vnode
52#define	i_cdev	v_rdev
53
54#define	S_IRUGO	(S_IRUSR | S_IRGRP | S_IROTH)
55#define	S_IWUGO	(S_IWUSR | S_IWGRP | S_IWOTH)
56
57
58typedef struct files_struct *fl_owner_t;
59
60struct dentry {
61	struct inode	*d_inode;
62};
63
64struct file_operations;
65
66struct linux_file {
67	struct file	*_file;
68	const struct file_operations	*f_op;
69	void 		*private_data;
70	int		f_flags;
71	int		f_mode;	/* Just starting mode. */
72	struct dentry	*f_dentry;
73	struct dentry	f_dentry_store;
74	struct selinfo	f_selinfo;
75	struct sigio	*f_sigio;
76};
77
78#define	file		linux_file
79#define	fasync_struct	sigio *
80
81#define	fasync_helper(fd, filp, on, queue)				\
82({									\
83	if ((on))							\
84		*(queue) = &(filp)->f_sigio;				\
85	else								\
86		*(queue) = NULL;					\
87	0;								\
88})
89
90#define	kill_fasync(queue, sig, pollstat)				\
91do {									\
92	if (*(queue) != NULL)						\
93		pgsigio(*(queue), (sig), 0);				\
94} while (0)
95
96typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
97
98struct file_operations {
99	struct module *owner;
100	ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
101	ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
102	unsigned int (*poll) (struct file *, struct poll_table_struct *);
103	long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
104	int (*mmap)(struct file *, struct vm_area_struct *);
105	int (*open)(struct inode *, struct file *);
106	int (*release)(struct inode *, struct file *);
107	int (*fasync)(int, struct file *, int);
108#if 0
109	/* We do not support these methods.  Don't permit them to compile. */
110	loff_t (*llseek)(struct file *, loff_t, int);
111	ssize_t (*aio_read)(struct kiocb *, const struct iovec *,
112	    unsigned long, loff_t);
113	ssize_t (*aio_write)(struct kiocb *, const struct iovec *,
114	    unsigned long, loff_t);
115	int (*readdir)(struct file *, void *, filldir_t);
116	int (*ioctl)(struct inode *, struct file *, unsigned int,
117	    unsigned long);
118	long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
119	int (*flush)(struct file *, fl_owner_t id);
120	int (*fsync)(struct file *, struct dentry *, int datasync);
121	int (*aio_fsync)(struct kiocb *, int datasync);
122	int (*lock)(struct file *, int, struct file_lock *);
123	ssize_t (*sendpage)(struct file *, struct page *, int, size_t,
124	    loff_t *, int);
125	unsigned long (*get_unmapped_area)(struct file *, unsigned long,
126	    unsigned long, unsigned long, unsigned long);
127	int (*check_flags)(int);
128	int (*flock)(struct file *, int, struct file_lock *);
129	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
130	    loff_t *, size_t, unsigned int);
131	ssize_t (*splice_read)(struct file *, loff_t *,
132	    struct pipe_inode_info *, size_t, unsigned int);
133	int (*setlease)(struct file *, long, struct file_lock **);
134#endif
135};
136#define	fops_get(fops)	(fops)
137
138#define	FMODE_READ	FREAD
139#define	FMODE_WRITE	FWRITE
140#define	FMODE_EXEC	FEXEC
141
142static inline int
143register_chrdev_region(dev_t dev, unsigned range, const char *name)
144{
145
146	return 0;
147}
148
149static inline void
150unregister_chrdev_region(dev_t dev, unsigned range)
151{
152
153	return;
154}
155
156static inline dev_t
157iminor(struct inode *inode)
158{
159
160	return dev2unit(inode->v_rdev);
161}
162
163static inline struct inode *
164igrab(struct inode *inode)
165{
166	int error;
167
168	error = vget(inode, 0, curthread);
169	if (error)
170		return (NULL);
171
172	return (inode);
173}
174
175static inline void
176iput(struct inode *inode)
177{
178
179	vrele(inode);
180}
181
182#endif	/* _LINUX_FS_H_ */
183