include/linux/file_compat.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_FILE_COMPAT_H
  26 #define _SPL_FILE_COMPAT_H
  27
  28 #include <linux/fs.h>
  29 #ifdef HAVE_FDTABLE_HEADER
  30 #include <linux/fdtable.h>
  31 #endif
  32
  33 static inline struct file *
  34 spl_filp_open(const char *name, int flags, int mode, int *err)
  35 {
  36         struct file *filp = NULL;
  37         int rc;
  38
  39         filp = filp_open(name, flags, mode);
  40         if (IS_ERR(filp)) {
  41                 rc = PTR_ERR(filp);
  42                 if (err)
  43                         *err = rc;
  44                 filp = NULL;
  45         }
  46         return (filp);
  47 }
  48
  49 #define spl_filp_close(f)               filp_close(f, NULL)
  50 #define spl_filp_poff(f)                (&(f)->f_pos)
  51 #define spl_filp_write(fp, b, s, p)     (fp)->f_op->write((fp), (b), (s), p)
  52
  53 static inline int
  54 spl_filp_fallocate(struct file *fp, int mode, loff_t offset, loff_t len)
  55 {
  56         int error = -EOPNOTSUPP;
  57
  58 #ifdef HAVE_FILE_FALLOCATE
  59         if (fp->f_op->fallocate)
  60                 error = fp->f_op->fallocate(fp, mode, offset, len);
  61 #else
  62 #ifdef HAVE_INODE_FALLOCATE
  63         if (fp->f_dentry && fp->f_dentry->d_inode &&
  64             fp->f_dentry->d_inode->i_op->fallocate)
  65                 error = fp->f_dentry->d_inode->i_op->fallocate(
  66                     fp->f_dentry->d_inode, mode, offset, len);
  67 #endif /* HAVE_INODE_FALLOCATE */
  68 #endif /* HAVE_FILE_FALLOCATE */
  69
  70         return (error);
  71 }
  72
  73 #ifdef HAVE_2ARGS_VFS_FSYNC
  74 #define spl_filp_fsync(fp, sync)        vfs_fsync(fp, sync)
  75 #else
  76 #define spl_filp_fsync(fp, sync)        vfs_fsync(fp, (fp)->f_dentry, sync)
  77 #endif /* HAVE_2ARGS_VFS_FSYNC */
  78
  79 #ifdef HAVE_INODE_LOCK_SHARED
  80 #define spl_inode_lock(ip)              inode_lock(ip)
  81 #define spl_inode_unlock(ip)            inode_unlock(ip)
  82 #define spl_inode_lock_shared(ip)       inode_lock_shared(ip)
  83 #define spl_inode_unlock_shared(ip)     inode_unlock_shared(ip)
  84 #define spl_inode_trylock(ip)           inode_trylock(ip)
  85 #define spl_inode_trylock_shared(ip)    inode_trylock_shared(ip)
  86 #define spl_inode_is_locked(ip)         inode_is_locked(ip)
  87 #define spl_inode_lock_nested(ip, s)    inode_lock_nested(ip, s)
  88 #else
  89 #define spl_inode_lock(ip)              mutex_lock(&(ip)->i_mutex)
  90 #define spl_inode_unlock(ip)            mutex_unlock(&(ip)->i_mutex)
  91 #define spl_inode_lock_shared(ip)       mutex_lock(&(ip)->i_mutex)
  92 #define spl_inode_unlock_shared(ip)     mutex_unlock(&(ip)->i_mutex)
  93 #define spl_inode_trylock(ip)           mutex_trylock(&(ip)->i_mutex)
  94 #define spl_inode_trylock_shared(ip)    mutex_trylock(&(ip)->i_mutex)
  95 #define spl_inode_is_locked(ip)         mutex_is_locked(&(ip)->i_mutex)
  96 #define spl_inode_lock_nested(ip, s)    mutex_lock_nested(&(ip)->i_mutex, s)
  97 #endif
  98
  99 #endif /* SPL_FILE_COMPAT_H */