1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 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 #include <linux/spinlock.h> 45 46 struct module; 47 struct kiocb; 48 struct iovec; 49 struct dentry; 50 struct page; 51 struct file_lock; 52 struct pipe_inode_info; 53 struct vm_area_struct; 54 struct poll_table_struct; 55 struct files_struct; 56 57 #define inode vnode 58 #define i_cdev v_rdev 59 60 #define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH) 61 #define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH) 62 63 64 typedef struct files_struct *fl_owner_t; 65 66 struct dentry { 67 struct inode *d_inode; 68 }; 69 70 struct file_operations; 71 72 struct linux_file { 73 struct file *_file; 74 const struct file_operations *f_op; 75 void *private_data; 76 int f_flags; 77 int f_mode; /* Just starting mode. */ 78 struct dentry *f_dentry; 79 struct dentry f_dentry_store; 80 struct selinfo f_selinfo; 81 struct sigio *f_sigio; 82 struct vnode *f_vnode; 83 volatile u_int f_count; 84 85 /* kqfilter support */ 86 int f_kqflags; 87 #define LINUX_KQ_FLAG_HAS_READ (1 << 0) 88 #define LINUX_KQ_FLAG_HAS_WRITE (1 << 1) 89 #define LINUX_KQ_FLAG_NEED_READ (1 << 2) 90 #define LINUX_KQ_FLAG_NEED_WRITE (1 << 3) 91 /* protects f_selinfo.si_note */ 92 spinlock_t f_kqlock; 93 }; 94 95 #define file linux_file 96 #define fasync_struct sigio * 97 98 #define fasync_helper(fd, filp, on, queue) \ 99 ({ \ 100 if ((on)) \ 101 *(queue) = &(filp)->f_sigio; \ 102 else \ 103 *(queue) = NULL; \ 104 0; \ 105 }) 106 107 #define kill_fasync(queue, sig, pollstat) \ 108 do { \ 109 if (*(queue) != NULL) \ 110 pgsigio(*(queue), (sig), 0); \ 111 } while (0) 112 113 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 114 115 struct file_operations { 116 struct module *owner; 117 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *); 118 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *); 119 unsigned int (*poll) (struct file *, struct poll_table_struct *); 120 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); 121 int (*mmap)(struct file *, struct vm_area_struct *); 122 int (*open)(struct inode *, struct file *); 123 int (*release)(struct inode *, struct file *); 124 int (*fasync)(int, struct file *, int); 125 126 /* Although not supported in FreeBSD, to align with Linux code 127 * we are adding llseek() only when it is mapped to no_llseek which returns 128 * an illegal seek error 129 */ 130 loff_t (*llseek)(struct file *, loff_t, int); 131 #if 0 132 /* We do not support these methods. Don't permit them to compile. */ 133 loff_t (*llseek)(struct file *, loff_t, int); 134 ssize_t (*aio_read)(struct kiocb *, const struct iovec *, 135 unsigned long, loff_t); 136 ssize_t (*aio_write)(struct kiocb *, const struct iovec *, 137 unsigned long, loff_t); 138 int (*readdir)(struct file *, void *, filldir_t); 139 int (*ioctl)(struct inode *, struct file *, unsigned int, 140 unsigned long); 141 long (*compat_ioctl)(struct file *, unsigned int, unsigned long); 142 int (*flush)(struct file *, fl_owner_t id); 143 int (*fsync)(struct file *, struct dentry *, int datasync); 144 int (*aio_fsync)(struct kiocb *, int datasync); 145 int (*lock)(struct file *, int, struct file_lock *); 146 ssize_t (*sendpage)(struct file *, struct page *, int, size_t, 147 loff_t *, int); 148 unsigned long (*get_unmapped_area)(struct file *, unsigned long, 149 unsigned long, unsigned long, unsigned long); 150 int (*check_flags)(int); 151 int (*flock)(struct file *, int, struct file_lock *); 152 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, 153 loff_t *, size_t, unsigned int); 154 ssize_t (*splice_read)(struct file *, loff_t *, 155 struct pipe_inode_info *, size_t, unsigned int); 156 int (*setlease)(struct file *, long, struct file_lock **); 157 #endif 158 }; 159 #define fops_get(fops) (fops) 160 161 #define FMODE_READ FREAD 162 #define FMODE_WRITE FWRITE 163 #define FMODE_EXEC FEXEC 164 165 int __register_chrdev(unsigned int major, unsigned int baseminor, 166 unsigned int count, const char *name, 167 const struct file_operations *fops); 168 int __register_chrdev_p(unsigned int major, unsigned int baseminor, 169 unsigned int count, const char *name, 170 const struct file_operations *fops, uid_t uid, 171 gid_t gid, int mode); 172 void __unregister_chrdev(unsigned int major, unsigned int baseminor, 173 unsigned int count, const char *name); 174 175 static inline void 176 unregister_chrdev(unsigned int major, const char *name) 177 { 178 179 __unregister_chrdev(major, 0, 256, name); 180 } 181 182 static inline int 183 register_chrdev(unsigned int major, const char *name, 184 const struct file_operations *fops) 185 { 186 187 return (__register_chrdev(major, 0, 256, name, fops)); 188 } 189 190 static inline int 191 register_chrdev_p(unsigned int major, const char *name, 192 const struct file_operations *fops, uid_t uid, gid_t gid, int mode) 193 { 194 195 return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode)); 196 } 197 198 static inline int 199 register_chrdev_region(dev_t dev, unsigned range, const char *name) 200 { 201 202 return 0; 203 } 204 205 static inline void 206 unregister_chrdev_region(dev_t dev, unsigned range) 207 { 208 209 return; 210 } 211 212 static inline int 213 alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, 214 const char *name) 215 { 216 217 return 0; 218 } 219 220 /* No current support for seek op in FreeBSD */ 221 static inline int 222 nonseekable_open(struct inode *inode, struct file *filp) 223 { 224 return 0; 225 } 226 227 static inline dev_t 228 iminor(struct inode *inode) 229 { 230 231 return (minor(dev2unit(inode->v_rdev))); 232 } 233 234 static inline struct linux_file * 235 get_file(struct linux_file *f) 236 { 237 238 refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count); 239 return (f); 240 } 241 242 static inline struct inode * 243 igrab(struct inode *inode) 244 { 245 int error; 246 247 error = vget(inode, 0, curthread); 248 if (error) 249 return (NULL); 250 251 return (inode); 252 } 253 254 static inline void 255 iput(struct inode *inode) 256 { 257 258 vrele(inode); 259 } 260 261 static inline loff_t 262 no_llseek(struct file *file, loff_t offset, int whence) 263 { 264 return -ESPIPE; 265 } 266 267 #endif /* _LINUX_FS_H_ */ 268