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 #define f_inode f_vnode 84 volatile u_int f_count; 85 86 /* anonymous shmem object */ 87 vm_object_t f_shmem; 88 89 /* kqfilter support */ 90 int f_kqflags; 91 #define LINUX_KQ_FLAG_HAS_READ (1 << 0) 92 #define LINUX_KQ_FLAG_HAS_WRITE (1 << 1) 93 #define LINUX_KQ_FLAG_NEED_READ (1 << 2) 94 #define LINUX_KQ_FLAG_NEED_WRITE (1 << 3) 95 /* protects f_selinfo.si_note */ 96 spinlock_t f_kqlock; 97 }; 98 99 #define file linux_file 100 #define fasync_struct sigio * 101 102 #define fasync_helper(fd, filp, on, queue) \ 103 ({ \ 104 if ((on)) \ 105 *(queue) = &(filp)->f_sigio; \ 106 else \ 107 *(queue) = NULL; \ 108 0; \ 109 }) 110 111 #define kill_fasync(queue, sig, pollstat) \ 112 do { \ 113 if (*(queue) != NULL) \ 114 pgsigio(*(queue), (sig), 0); \ 115 } while (0) 116 117 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 118 119 struct file_operations { 120 struct module *owner; 121 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *); 122 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *); 123 unsigned int (*poll) (struct file *, struct poll_table_struct *); 124 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); 125 int (*mmap)(struct file *, struct vm_area_struct *); 126 int (*open)(struct inode *, struct file *); 127 int (*release)(struct inode *, struct file *); 128 int (*fasync)(int, struct file *, int); 129 130 /* Although not supported in FreeBSD, to align with Linux code 131 * we are adding llseek() only when it is mapped to no_llseek which returns 132 * an illegal seek error 133 */ 134 loff_t (*llseek)(struct file *, loff_t, int); 135 #if 0 136 /* We do not support these methods. Don't permit them to compile. */ 137 loff_t (*llseek)(struct file *, loff_t, int); 138 ssize_t (*aio_read)(struct kiocb *, const struct iovec *, 139 unsigned long, loff_t); 140 ssize_t (*aio_write)(struct kiocb *, const struct iovec *, 141 unsigned long, loff_t); 142 int (*readdir)(struct file *, void *, filldir_t); 143 int (*ioctl)(struct inode *, struct file *, unsigned int, 144 unsigned long); 145 long (*compat_ioctl)(struct file *, unsigned int, unsigned long); 146 int (*flush)(struct file *, fl_owner_t id); 147 int (*fsync)(struct file *, struct dentry *, int datasync); 148 int (*aio_fsync)(struct kiocb *, int datasync); 149 int (*lock)(struct file *, int, struct file_lock *); 150 ssize_t (*sendpage)(struct file *, struct page *, int, size_t, 151 loff_t *, int); 152 unsigned long (*get_unmapped_area)(struct file *, unsigned long, 153 unsigned long, unsigned long, unsigned long); 154 int (*check_flags)(int); 155 int (*flock)(struct file *, int, struct file_lock *); 156 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, 157 loff_t *, size_t, unsigned int); 158 ssize_t (*splice_read)(struct file *, loff_t *, 159 struct pipe_inode_info *, size_t, unsigned int); 160 int (*setlease)(struct file *, long, struct file_lock **); 161 #endif 162 }; 163 #define fops_get(fops) (fops) 164 #define replace_fops(f, fops) ((f)->f_op = (fops)) 165 166 #define FMODE_READ FREAD 167 #define FMODE_WRITE FWRITE 168 #define FMODE_EXEC FEXEC 169 170 int __register_chrdev(unsigned int major, unsigned int baseminor, 171 unsigned int count, const char *name, 172 const struct file_operations *fops); 173 int __register_chrdev_p(unsigned int major, unsigned int baseminor, 174 unsigned int count, const char *name, 175 const struct file_operations *fops, uid_t uid, 176 gid_t gid, int mode); 177 void __unregister_chrdev(unsigned int major, unsigned int baseminor, 178 unsigned int count, const char *name); 179 180 static inline void 181 unregister_chrdev(unsigned int major, const char *name) 182 { 183 184 __unregister_chrdev(major, 0, 256, name); 185 } 186 187 static inline int 188 register_chrdev(unsigned int major, const char *name, 189 const struct file_operations *fops) 190 { 191 192 return (__register_chrdev(major, 0, 256, name, fops)); 193 } 194 195 static inline int 196 register_chrdev_p(unsigned int major, const char *name, 197 const struct file_operations *fops, uid_t uid, gid_t gid, int mode) 198 { 199 200 return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode)); 201 } 202 203 static inline int 204 register_chrdev_region(dev_t dev, unsigned range, const char *name) 205 { 206 207 return 0; 208 } 209 210 static inline void 211 unregister_chrdev_region(dev_t dev, unsigned range) 212 { 213 214 return; 215 } 216 217 static inline int 218 alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, 219 const char *name) 220 { 221 222 return 0; 223 } 224 225 /* No current support for seek op in FreeBSD */ 226 static inline int 227 nonseekable_open(struct inode *inode, struct file *filp) 228 { 229 return 0; 230 } 231 232 extern unsigned int linux_iminor(struct inode *); 233 #define iminor(...) linux_iminor(__VA_ARGS__) 234 235 static inline struct linux_file * 236 get_file(struct linux_file *f) 237 { 238 239 refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count); 240 return (f); 241 } 242 243 static inline struct inode * 244 igrab(struct inode *inode) 245 { 246 int error; 247 248 error = vget(inode, 0, curthread); 249 if (error) 250 return (NULL); 251 252 return (inode); 253 } 254 255 static inline void 256 iput(struct inode *inode) 257 { 258 259 vrele(inode); 260 } 261 262 static inline loff_t 263 no_llseek(struct file *file, loff_t offset, int whence) 264 { 265 266 return (-ESPIPE); 267 } 268 269 static inline loff_t 270 noop_llseek(struct linux_file *file, loff_t offset, int whence) 271 { 272 273 return (file->_file->f_offset); 274 } 275 276 #endif /* _LINUX_FS_H_ */ 277