1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef	_LINUX_FS_H_
30#define	_LINUX_FS_H_
31
32#include <sys/cdefs.h>
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/conf.h>
36#include <sys/vnode.h>
37#include <sys/file.h>
38#include <sys/filedesc.h>
39#include <linux/types.h>
40#include <linux/wait.h>
41#include <linux/semaphore.h>
42
43struct module;
44struct kiocb;
45struct iovec;
46struct dentry;
47struct page;
48struct file_lock;
49struct pipe_inode_info;
50struct vm_area_struct;
51struct poll_table_struct;
52struct files_struct;
53
54#define	inode	vnode
55#define	i_cdev	v_rdev
56
57#define	S_IRUGO	(S_IRUSR | S_IRGRP | S_IROTH)
58#define	S_IWUGO	(S_IWUSR | S_IWGRP | S_IWOTH)
59
60
61typedef struct files_struct *fl_owner_t;
62
63struct dentry {
64	struct inode	*d_inode;
65};
66
67struct file_operations;
68
69struct linux_file {
70	struct file	*_file;
71	const struct file_operations	*f_op;
72	void 		*private_data;
73	int		f_flags;
74	int		f_mode;	/* Just starting mode. */
75	struct dentry	*f_dentry;
76	struct dentry	f_dentry_store;
77	struct selinfo	f_selinfo;
78	struct sigio	*f_sigio;
79	struct vnode	*f_vnode;
80};
81
82#define	file		linux_file
83#define	fasync_struct	sigio *
84
85#define	fasync_helper(fd, filp, on, queue)				\
86({									\
87	if ((on))							\
88		*(queue) = &(filp)->f_sigio;				\
89	else								\
90		*(queue) = NULL;					\
91	0;								\
92})
93
94#define	kill_fasync(queue, sig, pollstat)				\
95do {									\
96	if (*(queue) != NULL)						\
97		pgsigio(*(queue), (sig), 0);				\
98} while (0)
99
100typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
101
102struct file_operations {
103	struct module *owner;
104	ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
105	ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
106	unsigned int (*poll) (struct file *, struct poll_table_struct *);
107	long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
108	int (*mmap)(struct file *, struct vm_area_struct *);
109	int (*open)(struct inode *, struct file *);
110	int (*release)(struct inode *, struct file *);
111	int (*fasync)(int, struct file *, int);
112
113/* Although not supported in FreeBSD, to align with Linux code
114 * we are adding llseek() only when it is mapped to no_llseek which returns
115 * an illegal seek error
116 */
117	loff_t (*llseek)(struct file *, loff_t, int);
118#if 0
119	/* We do not support these methods.  Don't permit them to compile. */
120	loff_t (*llseek)(struct file *, loff_t, int);
121	ssize_t (*aio_read)(struct kiocb *, const struct iovec *,
122	    unsigned long, loff_t);
123	ssize_t (*aio_write)(struct kiocb *, const struct iovec *,
124	    unsigned long, loff_t);
125	int (*readdir)(struct file *, void *, filldir_t);
126	int (*ioctl)(struct inode *, struct file *, unsigned int,
127	    unsigned long);
128	long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
129	int (*flush)(struct file *, fl_owner_t id);
130	int (*fsync)(struct file *, struct dentry *, int datasync);
131	int (*aio_fsync)(struct kiocb *, int datasync);
132	int (*lock)(struct file *, int, struct file_lock *);
133	ssize_t (*sendpage)(struct file *, struct page *, int, size_t,
134	    loff_t *, int);
135	unsigned long (*get_unmapped_area)(struct file *, unsigned long,
136	    unsigned long, unsigned long, unsigned long);
137	int (*check_flags)(int);
138	int (*flock)(struct file *, int, struct file_lock *);
139	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
140	    loff_t *, size_t, unsigned int);
141	ssize_t (*splice_read)(struct file *, loff_t *,
142	    struct pipe_inode_info *, size_t, unsigned int);
143	int (*setlease)(struct file *, long, struct file_lock **);
144#endif
145};
146#define	fops_get(fops)	(fops)
147
148#define	FMODE_READ	FREAD
149#define	FMODE_WRITE	FWRITE
150#define	FMODE_EXEC	FEXEC
151
152static inline int
153register_chrdev_region(dev_t dev, unsigned range, const char *name)
154{
155
156	return 0;
157}
158
159static inline void
160unregister_chrdev_region(dev_t dev, unsigned range)
161{
162
163	return;
164}
165
166static inline int
167alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
168			const char *name)
169{
170
171	return 0;
172}
173
174/* No current support for seek op in FreeBSD */
175static inline int
176nonseekable_open(struct inode *inode, struct file *filp)
177{
178	return 0;
179}
180
181static inline dev_t
182iminor(struct inode *inode)
183{
184
185	return dev2unit(inode->v_rdev);
186}
187
188static inline struct inode *
189igrab(struct inode *inode)
190{
191	int error;
192
193	error = vget(inode, 0, curthread);
194	if (error)
195		return (NULL);
196
197	return (inode);
198}
199
200static inline void
201iput(struct inode *inode)
202{
203
204	vrele(inode);
205}
206
207static inline loff_t
208no_llseek(struct file *file, loff_t offset, int whence)
209{
210        return -ESPIPE;
211}
212
213#endif /* _LINUX_FS_H_ */
214