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 * $FreeBSD$
30 */
31 #ifndef _LINUX_FS_H_
32 #define _LINUX_FS_H_
33
34 #include <sys/cdefs.h>
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/conf.h>
38 #include <sys/vnode.h>
39 #include <sys/file.h>
40 #include <sys/filedesc.h>
41 #include <linux/types.h>
42 #include <linux/wait.h>
43 #include <linux/semaphore.h>
44
45 struct module;
46 struct kiocb;
47 struct iovec;
48 struct dentry;
49 struct page;
50 struct file_lock;
51 struct pipe_inode_info;
52 struct vm_area_struct;
53 struct poll_table_struct;
54 struct files_struct;
55
56 #define inode vnode
57 #define i_cdev v_rdev
58
59 #define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH)
60 #define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH)
61
62
63 typedef struct files_struct *fl_owner_t;
64
65 struct dentry {
66 struct inode *d_inode;
67 };
68
69 struct file_operations;
70
71 struct linux_file {
72 struct file *_file;
73 const struct file_operations *f_op;
74 void *private_data;
75 int f_flags;
76 int f_mode; /* Just starting mode. */
77 struct dentry *f_dentry;
78 struct dentry f_dentry_store;
79 struct selinfo f_selinfo;
80 struct sigio *f_sigio;
81 struct vnode *f_vnode;
82 };
83
84 #define file linux_file
85 #define fasync_struct sigio *
86
87 #define fasync_helper(fd, filp, on, queue) \
88 ({ \
89 if ((on)) \
90 *(queue) = &(filp)->f_sigio; \
91 else \
92 *(queue) = NULL; \
93 0; \
94 })
95
96 #define kill_fasync(queue, sig, pollstat) \
97 do { \
98 if (*(queue) != NULL) \
99 pgsigio(*(queue), (sig), 0); \
100 } while (0)
101
102 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
103
104 struct file_operations {
105 struct module *owner;
106 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
107 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
108 unsigned int (*poll) (struct file *, struct poll_table_struct *);
109 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
110 int (*mmap)(struct file *, struct vm_area_struct *);
111 int (*open)(struct inode *, struct file *);
112 int (*release)(struct inode *, struct file *);
113 int (*fasync)(int, struct file *, int);
114
115 /* Although not supported in FreeBSD, to align with Linux code
116 * we are adding llseek() only when it is mapped to no_llseek which returns
117 * an illegal seek error
118 */
119 loff_t (*llseek)(struct file *, loff_t, int);
120 #if 0
121 /* We do not support these methods. Don't permit them to compile. */
122 loff_t (*llseek)(struct file *, loff_t, int);
123 ssize_t (*aio_read)(struct kiocb *, const struct iovec *,
124 unsigned long, loff_t);
125 ssize_t (*aio_write)(struct kiocb *, const struct iovec *,
126 unsigned long, loff_t);
127 int (*readdir)(struct file *, void *, filldir_t);
128 int (*ioctl)(struct inode *, struct file *, unsigned int,
129 unsigned long);
130 long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
131 int (*flush)(struct file *, fl_owner_t id);
132 int (*fsync)(struct file *, struct dentry *, int datasync);
133 int (*aio_fsync)(struct kiocb *, int datasync);
134 int (*lock)(struct file *, int, struct file_lock *);
135 ssize_t (*sendpage)(struct file *, struct page *, int, size_t,
136 loff_t *, int);
137 unsigned long (*get_unmapped_area)(struct file *, unsigned long,
138 unsigned long, unsigned long, unsigned long);
139 int (*check_flags)(int);
140 int (*flock)(struct file *, int, struct file_lock *);
141 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
142 loff_t *, size_t, unsigned int);
143 ssize_t (*splice_read)(struct file *, loff_t *,
144 struct pipe_inode_info *, size_t, unsigned int);
145 int (*setlease)(struct file *, long, struct file_lock **);
146 #endif
147 };
148 #define fops_get(fops) (fops)
149
150 #define FMODE_READ FREAD
151 #define FMODE_WRITE FWRITE
152 #define FMODE_EXEC FEXEC
153
154 static inline int
register_chrdev_region(dev_t dev,unsigned range,const char * name)155 register_chrdev_region(dev_t dev, unsigned range, const char *name)
156 {
157
158 return 0;
159 }
160
161 static inline void
unregister_chrdev_region(dev_t dev,unsigned range)162 unregister_chrdev_region(dev_t dev, unsigned range)
163 {
164
165 return;
166 }
167
168 static inline int
alloc_chrdev_region(dev_t * dev,unsigned baseminor,unsigned count,const char * name)169 alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
170 const char *name)
171 {
172
173 return 0;
174 }
175
176 /* No current support for seek op in FreeBSD */
177 static inline int
nonseekable_open(struct inode * inode,struct file * filp)178 nonseekable_open(struct inode *inode, struct file *filp)
179 {
180 return 0;
181 }
182
183 static inline dev_t
iminor(struct inode * inode)184 iminor(struct inode *inode)
185 {
186
187 return dev2unit(inode->v_rdev);
188 }
189
190 static inline struct inode *
igrab(struct inode * inode)191 igrab(struct inode *inode)
192 {
193 int error;
194
195 error = vget(inode, 0, curthread);
196 if (error)
197 return (NULL);
198
199 return (inode);
200 }
201
202 static inline void
iput(struct inode * inode)203 iput(struct inode *inode)
204 {
205
206 vrele(inode);
207 }
208
209 static inline loff_t
no_llseek(struct file * file,loff_t offset,int whence)210 no_llseek(struct file *file, loff_t offset, int whence)
211 {
212 return -ESPIPE;
213 }
214
215 #endif /* _LINUX_FS_H_ */
216