fs.h revision 251617
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 struct vnode *f_vnode; 77}; 78 79#define file linux_file 80#define fasync_struct sigio * 81 82#define fasync_helper(fd, filp, on, queue) \ 83({ \ 84 if ((on)) \ 85 *(queue) = &(filp)->f_sigio; \ 86 else \ 87 *(queue) = NULL; \ 88 0; \ 89}) 90 91#define kill_fasync(queue, sig, pollstat) \ 92do { \ 93 if (*(queue) != NULL) \ 94 pgsigio(*(queue), (sig), 0); \ 95} while (0) 96 97typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 98 99struct file_operations { 100 struct module *owner; 101 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *); 102 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *); 103 unsigned int (*poll) (struct file *, struct poll_table_struct *); 104 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); 105 int (*mmap)(struct file *, struct vm_area_struct *); 106 int (*open)(struct inode *, struct file *); 107 int (*release)(struct inode *, struct file *); 108 int (*fasync)(int, struct file *, int); 109#if 0 110 /* We do not support these methods. Don't permit them to compile. */ 111 loff_t (*llseek)(struct file *, loff_t, int); 112 ssize_t (*aio_read)(struct kiocb *, const struct iovec *, 113 unsigned long, loff_t); 114 ssize_t (*aio_write)(struct kiocb *, const struct iovec *, 115 unsigned long, loff_t); 116 int (*readdir)(struct file *, void *, filldir_t); 117 int (*ioctl)(struct inode *, struct file *, unsigned int, 118 unsigned long); 119 long (*compat_ioctl)(struct file *, unsigned int, unsigned long); 120 int (*flush)(struct file *, fl_owner_t id); 121 int (*fsync)(struct file *, struct dentry *, int datasync); 122 int (*aio_fsync)(struct kiocb *, int datasync); 123 int (*lock)(struct file *, int, struct file_lock *); 124 ssize_t (*sendpage)(struct file *, struct page *, int, size_t, 125 loff_t *, int); 126 unsigned long (*get_unmapped_area)(struct file *, unsigned long, 127 unsigned long, unsigned long, unsigned long); 128 int (*check_flags)(int); 129 int (*flock)(struct file *, int, struct file_lock *); 130 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, 131 loff_t *, size_t, unsigned int); 132 ssize_t (*splice_read)(struct file *, loff_t *, 133 struct pipe_inode_info *, size_t, unsigned int); 134 int (*setlease)(struct file *, long, struct file_lock **); 135#endif 136}; 137#define fops_get(fops) (fops) 138 139#define FMODE_READ FREAD 140#define FMODE_WRITE FWRITE 141#define FMODE_EXEC FEXEC 142 143static inline int 144register_chrdev_region(dev_t dev, unsigned range, const char *name) 145{ 146 147 return 0; 148} 149 150static inline void 151unregister_chrdev_region(dev_t dev, unsigned range) 152{ 153 154 return; 155} 156 157static inline dev_t 158iminor(struct inode *inode) 159{ 160 161 return dev2unit(inode->v_rdev); 162} 163 164static inline struct inode * 165igrab(struct inode *inode) 166{ 167 int error; 168 169 error = vget(inode, 0, curthread); 170 if (error) 171 return (NULL); 172 173 return (inode); 174} 175 176static inline void 177iput(struct inode *inode) 178{ 179 180 vrele(inode); 181} 182 183#endif /* _LINUX_FS_H_ */ 184