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 struct pfs_node; 57 58 #define inode vnode 59 #define i_cdev v_rdev 60 #define i_private v_data 61 62 #define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH) 63 #define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH) 64 65 66 typedef struct files_struct *fl_owner_t; 67 68 struct dentry { 69 struct inode *d_inode; 70 struct pfs_node *d_pfs_node; 71 }; 72 73 struct file_operations; 74 75 struct linux_file { 76 struct file *_file; 77 const struct file_operations *f_op; 78 void *private_data; 79 int f_flags; 80 int f_mode; /* Just starting mode. */ 81 struct dentry *f_dentry; 82 struct dentry f_dentry_store; 83 struct selinfo f_selinfo; 84 struct sigio *f_sigio; 85 struct vnode *f_vnode; 86 #define f_inode f_vnode 87 volatile u_int f_count; 88 89 /* anonymous shmem object */ 90 vm_object_t f_shmem; 91 92 /* kqfilter support */ 93 int f_kqflags; 94 #define LINUX_KQ_FLAG_HAS_READ (1 << 0) 95 #define LINUX_KQ_FLAG_HAS_WRITE (1 << 1) 96 #define LINUX_KQ_FLAG_NEED_READ (1 << 2) 97 #define LINUX_KQ_FLAG_NEED_WRITE (1 << 3) 98 /* protects f_selinfo.si_note */ 99 spinlock_t f_kqlock; 100 }; 101 102 #define file linux_file 103 #define fasync_struct sigio * 104 105 #define fasync_helper(fd, filp, on, queue) \ 106 ({ \ 107 if ((on)) \ 108 *(queue) = &(filp)->f_sigio; \ 109 else \ 110 *(queue) = NULL; \ 111 0; \ 112 }) 113 114 #define kill_fasync(queue, sig, pollstat) \ 115 do { \ 116 if (*(queue) != NULL) \ 117 pgsigio(*(queue), (sig), 0); \ 118 } while (0) 119 120 typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 121 122 struct file_operations { 123 struct module *owner; 124 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *); 125 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *); 126 unsigned int (*poll) (struct file *, struct poll_table_struct *); 127 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); 128 int (*mmap)(struct file *, struct vm_area_struct *); 129 int (*open)(struct inode *, struct file *); 130 int (*release)(struct inode *, struct file *); 131 int (*fasync)(int, struct file *, int); 132 133 /* Although not supported in FreeBSD, to align with Linux code 134 * we are adding llseek() only when it is mapped to no_llseek which returns 135 * an illegal seek error 136 */ 137 loff_t (*llseek)(struct file *, loff_t, int); 138 #if 0 139 /* We do not support these methods. Don't permit them to compile. */ 140 loff_t (*llseek)(struct file *, loff_t, int); 141 ssize_t (*aio_read)(struct kiocb *, const struct iovec *, 142 unsigned long, loff_t); 143 ssize_t (*aio_write)(struct kiocb *, const struct iovec *, 144 unsigned long, loff_t); 145 int (*readdir)(struct file *, void *, filldir_t); 146 int (*ioctl)(struct inode *, struct file *, unsigned int, 147 unsigned long); 148 long (*compat_ioctl)(struct file *, unsigned int, unsigned long); 149 int (*flush)(struct file *, fl_owner_t id); 150 int (*fsync)(struct file *, struct dentry *, int datasync); 151 int (*aio_fsync)(struct kiocb *, int datasync); 152 int (*lock)(struct file *, int, struct file_lock *); 153 ssize_t (*sendpage)(struct file *, struct page *, int, size_t, 154 loff_t *, int); 155 unsigned long (*get_unmapped_area)(struct file *, unsigned long, 156 unsigned long, unsigned long, unsigned long); 157 int (*check_flags)(int); 158 int (*flock)(struct file *, int, struct file_lock *); 159 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, 160 loff_t *, size_t, unsigned int); 161 ssize_t (*splice_read)(struct file *, loff_t *, 162 struct pipe_inode_info *, size_t, unsigned int); 163 int (*setlease)(struct file *, long, struct file_lock **); 164 #endif 165 }; 166 #define fops_get(fops) (fops) 167 #define replace_fops(f, fops) ((f)->f_op = (fops)) 168 169 #define FMODE_READ FREAD 170 #define FMODE_WRITE FWRITE 171 #define FMODE_EXEC FEXEC 172 173 int __register_chrdev(unsigned int major, unsigned int baseminor, 174 unsigned int count, const char *name, 175 const struct file_operations *fops); 176 int __register_chrdev_p(unsigned int major, unsigned int baseminor, 177 unsigned int count, const char *name, 178 const struct file_operations *fops, uid_t uid, 179 gid_t gid, int mode); 180 void __unregister_chrdev(unsigned int major, unsigned int baseminor, 181 unsigned int count, const char *name); 182 183 static inline void 184 unregister_chrdev(unsigned int major, const char *name) 185 { 186 187 __unregister_chrdev(major, 0, 256, name); 188 } 189 190 static inline int 191 register_chrdev(unsigned int major, const char *name, 192 const struct file_operations *fops) 193 { 194 195 return (__register_chrdev(major, 0, 256, name, fops)); 196 } 197 198 static inline int 199 register_chrdev_p(unsigned int major, const char *name, 200 const struct file_operations *fops, uid_t uid, gid_t gid, int mode) 201 { 202 203 return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode)); 204 } 205 206 static inline int 207 register_chrdev_region(dev_t dev, unsigned range, const char *name) 208 { 209 210 return 0; 211 } 212 213 static inline void 214 unregister_chrdev_region(dev_t dev, unsigned range) 215 { 216 217 return; 218 } 219 220 static inline int 221 alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, 222 const char *name) 223 { 224 225 return 0; 226 } 227 228 /* No current support for seek op in FreeBSD */ 229 static inline int 230 nonseekable_open(struct inode *inode, struct file *filp) 231 { 232 return 0; 233 } 234 235 extern unsigned int linux_iminor(struct inode *); 236 #define iminor(...) linux_iminor(__VA_ARGS__) 237 238 static inline struct linux_file * 239 get_file(struct linux_file *f) 240 { 241 242 refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count); 243 return (f); 244 } 245 246 static inline struct inode * 247 igrab(struct inode *inode) 248 { 249 int error; 250 251 error = vget(inode, 0, curthread); 252 if (error) 253 return (NULL); 254 255 return (inode); 256 } 257 258 static inline void 259 iput(struct inode *inode) 260 { 261 262 vrele(inode); 263 } 264 265 static inline loff_t 266 no_llseek(struct file *file, loff_t offset, int whence) 267 { 268 269 return (-ESPIPE); 270 } 271 272 static inline loff_t 273 noop_llseek(struct linux_file *file, loff_t offset, int whence) 274 { 275 276 return (file->_file->f_offset); 277 } 278 279 #endif /* _LINUX_FS_H_ */ 280