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
43 struct module;
44 struct kiocb;
45 struct iovec;
46 struct dentry;
47 struct page;
48 struct file_lock;
49 struct pipe_inode_info;
50 struct vm_area_struct;
51 struct poll_table_struct;
52 struct 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
61 typedef struct files_struct *fl_owner_t;
62
63 struct dentry {
64 struct inode *d_inode;
65 };
66
67 struct file_operations;
68
69 struct 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) \
95 do { \
96 if (*(queue) != NULL) \
97 pgsigio(*(queue), (sig), 0); \
98 } while (0)
99
100 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
101
102 struct 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
152 static inline int
register_chrdev_region(dev_t dev,unsigned range,const char * name)153 register_chrdev_region(dev_t dev, unsigned range, const char *name)
154 {
155
156 return 0;
157 }
158
159 static inline void
unregister_chrdev_region(dev_t dev,unsigned range)160 unregister_chrdev_region(dev_t dev, unsigned range)
161 {
162
163 return;
164 }
165
166 static inline int
alloc_chrdev_region(dev_t * dev,unsigned baseminor,unsigned count,const char * name)167 alloc_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 */
175 static inline int
nonseekable_open(struct inode * inode,struct file * filp)176 nonseekable_open(struct inode *inode, struct file *filp)
177 {
178 return 0;
179 }
180
181 static inline dev_t
iminor(struct inode * inode)182 iminor(struct inode *inode)
183 {
184
185 return dev2unit(inode->v_rdev);
186 }
187
188 static inline struct inode *
igrab(struct inode * inode)189 igrab(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
200 static inline void
iput(struct inode * inode)201 iput(struct inode *inode)
202 {
203
204 vrele(inode);
205 }
206
207 static inline loff_t
no_llseek(struct file * file,loff_t offset,int whence)208 no_llseek(struct file *file, loff_t offset, int whence)
209 {
210 return -ESPIPE;
211 }
212
213 #endif /* _LINUX_FS_H_ */
214