1/*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2018 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: stable/11/sys/compat/linuxkpi/common/include/linux/fs.h 341850 2018-12-12 10:09:23Z hselasky $ 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#include <linux/dcache.h> 46 47struct module; 48struct kiocb; 49struct iovec; 50struct dentry; 51struct page; 52struct file_lock; 53struct pipe_inode_info; 54struct vm_area_struct; 55struct poll_table_struct; 56struct files_struct; 57struct pfs_node; 58struct linux_cdev; 59 60#define inode vnode 61#define i_cdev v_rdev 62#define i_private v_data 63 64#define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH) 65#define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH) 66 67 68typedef struct files_struct *fl_owner_t; 69 70struct file_operations; 71 72struct linux_file_wait_queue { 73 struct wait_queue wq; 74 struct wait_queue_head *wqh; 75 atomic_t state; 76#define LINUX_FWQ_STATE_INIT 0 77#define LINUX_FWQ_STATE_NOT_READY 1 78#define LINUX_FWQ_STATE_QUEUED 2 79#define LINUX_FWQ_STATE_READY 3 80#define LINUX_FWQ_STATE_MAX 4 81}; 82 83struct linux_file { 84 struct file *_file; 85 const struct file_operations *f_op; 86 void *private_data; 87 int f_flags; 88 int f_mode; /* Just starting mode. */ 89 struct dentry *f_dentry; 90 struct dentry f_dentry_store; 91 struct selinfo f_selinfo; 92 struct sigio *f_sigio; 93 struct vnode *f_vnode; 94#define f_inode f_vnode 95 volatile u_int f_count; 96 97 /* anonymous shmem object */ 98 vm_object_t f_shmem; 99 100 /* kqfilter support */ 101 int f_kqflags; 102#define LINUX_KQ_FLAG_HAS_READ (1 << 0) 103#define LINUX_KQ_FLAG_HAS_WRITE (1 << 1) 104#define LINUX_KQ_FLAG_NEED_READ (1 << 2) 105#define LINUX_KQ_FLAG_NEED_WRITE (1 << 3) 106 /* protects f_selinfo.si_note */ 107 spinlock_t f_kqlock; 108 struct linux_file_wait_queue f_wait_queue; 109 110 /* pointer to associated character device, if any */ 111 struct linux_cdev *f_cdev; 112}; 113 114#define file linux_file 115#define fasync_struct sigio * 116 117#define fasync_helper(fd, filp, on, queue) \ 118({ \ 119 if ((on)) \ 120 *(queue) = &(filp)->f_sigio; \ 121 else \ 122 *(queue) = NULL; \ 123 0; \ 124}) 125 126#define kill_fasync(queue, sig, pollstat) \ 127do { \ 128 if (*(queue) != NULL) \ 129 pgsigio(*(queue), (sig), 0); \ 130} while (0) 131 132typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 133 134struct file_operations { 135 struct module *owner; 136 ssize_t (*read)(struct file *, char __user *, size_t, loff_t *); 137 ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *); 138 unsigned int (*poll) (struct file *, struct poll_table_struct *); 139 long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long); 140 long (*compat_ioctl)(struct file *, unsigned int, unsigned long); 141 int (*mmap)(struct file *, struct vm_area_struct *); 142 int (*open)(struct inode *, struct file *); 143 int (*release)(struct inode *, struct file *); 144 int (*fasync)(int, struct file *, int); 145 146/* Although not supported in FreeBSD, to align with Linux code 147 * we are adding llseek() only when it is mapped to no_llseek which returns 148 * an illegal seek error 149 */ 150 loff_t (*llseek)(struct file *, loff_t, int); 151#if 0 152 /* We do not support these methods. Don't permit them to compile. */ 153 loff_t (*llseek)(struct file *, loff_t, int); 154 ssize_t (*aio_read)(struct kiocb *, const struct iovec *, 155 unsigned long, loff_t); 156 ssize_t (*aio_write)(struct kiocb *, const struct iovec *, 157 unsigned long, loff_t); 158 int (*readdir)(struct file *, void *, filldir_t); 159 int (*ioctl)(struct inode *, struct file *, unsigned int, 160 unsigned long); 161 int (*flush)(struct file *, fl_owner_t id); 162 int (*fsync)(struct file *, struct dentry *, int datasync); 163 int (*aio_fsync)(struct kiocb *, int datasync); 164 int (*lock)(struct file *, int, struct file_lock *); 165 ssize_t (*sendpage)(struct file *, struct page *, int, size_t, 166 loff_t *, int); 167 unsigned long (*get_unmapped_area)(struct file *, unsigned long, 168 unsigned long, unsigned long, unsigned long); 169 int (*check_flags)(int); 170 int (*flock)(struct file *, int, struct file_lock *); 171 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, 172 loff_t *, size_t, unsigned int); 173 ssize_t (*splice_read)(struct file *, loff_t *, 174 struct pipe_inode_info *, size_t, unsigned int); 175 int (*setlease)(struct file *, long, struct file_lock **); 176#endif 177}; 178#define fops_get(fops) (fops) 179#define replace_fops(f, fops) ((f)->f_op = (fops)) 180 181#define FMODE_READ FREAD 182#define FMODE_WRITE FWRITE 183#define FMODE_EXEC FEXEC 184 185int __register_chrdev(unsigned int major, unsigned int baseminor, 186 unsigned int count, const char *name, 187 const struct file_operations *fops); 188int __register_chrdev_p(unsigned int major, unsigned int baseminor, 189 unsigned int count, const char *name, 190 const struct file_operations *fops, uid_t uid, 191 gid_t gid, int mode); 192void __unregister_chrdev(unsigned int major, unsigned int baseminor, 193 unsigned int count, const char *name); 194 195static inline void 196unregister_chrdev(unsigned int major, const char *name) 197{ 198 199 __unregister_chrdev(major, 0, 256, name); 200} 201 202static inline int 203register_chrdev(unsigned int major, const char *name, 204 const struct file_operations *fops) 205{ 206 207 return (__register_chrdev(major, 0, 256, name, fops)); 208} 209 210static inline int 211register_chrdev_p(unsigned int major, const char *name, 212 const struct file_operations *fops, uid_t uid, gid_t gid, int mode) 213{ 214 215 return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode)); 216} 217 218static inline int 219register_chrdev_region(dev_t dev, unsigned range, const char *name) 220{ 221 222 return 0; 223} 224 225static inline void 226unregister_chrdev_region(dev_t dev, unsigned range) 227{ 228 229 return; 230} 231 232static inline int 233alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, 234 const char *name) 235{ 236 237 return 0; 238} 239 240/* No current support for seek op in FreeBSD */ 241static inline int 242nonseekable_open(struct inode *inode, struct file *filp) 243{ 244 return 0; 245} 246 247extern unsigned int linux_iminor(struct inode *); 248#define iminor(...) linux_iminor(__VA_ARGS__) 249 250static inline struct linux_file * 251get_file(struct linux_file *f) 252{ 253 254 refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count); 255 return (f); 256} 257 258static inline struct inode * 259igrab(struct inode *inode) 260{ 261 int error; 262 263 error = vget(inode, 0, curthread); 264 if (error) 265 return (NULL); 266 267 return (inode); 268} 269 270static inline void 271iput(struct inode *inode) 272{ 273 274 vrele(inode); 275} 276 277static inline loff_t 278no_llseek(struct file *file, loff_t offset, int whence) 279{ 280 281 return (-ESPIPE); 282} 283 284static inline loff_t 285noop_llseek(struct linux_file *file, loff_t offset, int whence) 286{ 287 288 return (file->_file->f_offset); 289} 290 291static inline struct vnode * 292file_inode(const struct linux_file *file) 293{ 294 295 return (file->f_vnode); 296} 297 298static inline int 299call_mmap(struct linux_file *file, struct vm_area_struct *vma) 300{ 301 302 return (file->f_op->mmap(file, vma)); 303} 304 305/* Shared memory support */ 306unsigned long linux_invalidate_mapping_pages(vm_object_t, pgoff_t, pgoff_t); 307struct page *linux_shmem_read_mapping_page_gfp(vm_object_t, int, gfp_t); 308struct linux_file *linux_shmem_file_setup(const char *, loff_t, unsigned long); 309void linux_shmem_truncate_range(vm_object_t, loff_t, loff_t); 310 311#define invalidate_mapping_pages(...) \ 312 linux_invalidate_mapping_pages(__VA_ARGS__) 313 314#define shmem_read_mapping_page(...) \ 315 linux_shmem_read_mapping_page_gfp(__VA_ARGS__, 0) 316 317#define shmem_read_mapping_page_gfp(...) \ 318 linux_shmem_read_mapping_page_gfp(__VA_ARGS__) 319 320#define shmem_file_setup(...) \ 321 linux_shmem_file_setup(__VA_ARGS__) 322 323#define shmem_truncate_range(...) \ 324 linux_shmem_truncate_range(__VA_ARGS__) 325 326#endif /* _LINUX_FS_H_ */ 327