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/*****************************************************************************\
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
* For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
\*****************************************************************************/
#ifndef _SPL_FILE_COMPAT_H
#define _SPL_FILE_COMPAT_H
#include <linux/fs.h>
#include <linux/uaccess.h>
#ifdef HAVE_FDTABLE_HEADER
#include <linux/fdtable.h>
#endif
static inline struct file *
spl_filp_open(const char *name, int flags, int mode, int *err)
{
struct file *filp = NULL;
int rc;
filp = filp_open(name, flags, mode);
if (IS_ERR(filp)) {
rc = PTR_ERR(filp);
if (err)
*err = rc;
filp = NULL;
}
return filp;
}
#define spl_filp_close(f) filp_close(f, NULL)
#define spl_filp_poff(f) (&(f)->f_pos)
#define spl_filp_write(fp, b, s, p) (fp)->f_op->write((fp), (b), (s), p)
static inline int
spl_filp_fallocate(struct file *fp, int mode, loff_t offset, loff_t len)
{
int error = -EOPNOTSUPP;
#ifdef HAVE_FILE_FALLOCATE
if (fp->f_op->fallocate)
error = fp->f_op->fallocate(fp, mode, offset, len);
#else
#ifdef HAVE_INODE_FALLOCATE
if (fp->f_dentry && fp->f_dentry->d_inode &&
fp->f_dentry->d_inode->i_op->fallocate)
error = fp->f_dentry->d_inode->i_op->fallocate(
fp->f_dentry->d_inode, mode, offset, len);
#endif /* HAVE_INODE_FALLOCATE */
#endif /*HAVE_FILE_FALLOCATE */
return (error);
}
static inline ssize_t
spl_kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
{
#if defined(HAVE_KERNEL_WRITE_PPOS)
return (kernel_write(file, buf, count, pos));
#else
mm_segment_t saved_fs;
ssize_t ret;
saved_fs = get_fs();
set_fs(get_ds());
ret = vfs_write(file, (__force const char __user *)buf, count, pos);
set_fs(saved_fs);
return (ret);
#endif
}
static inline ssize_t
spl_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
{
#if defined(HAVE_KERNEL_READ_PPOS)
return (kernel_read(file, buf, count, pos));
#else
mm_segment_t saved_fs;
ssize_t ret;
saved_fs = get_fs();
set_fs(get_ds());
ret = vfs_read(file, (void __user *)buf, count, pos);
set_fs(saved_fs);
return (ret);
#endif
}
#ifdef HAVE_2ARGS_VFS_FSYNC
#define spl_filp_fsync(fp, sync) vfs_fsync(fp, sync)
#else
#define spl_filp_fsync(fp, sync) vfs_fsync(fp, (fp)->f_dentry, sync)
#endif /* HAVE_2ARGS_VFS_FSYNC */
#ifdef HAVE_INODE_LOCK_SHARED
#define spl_inode_lock(ip) inode_lock(ip)
#define spl_inode_unlock(ip) inode_unlock(ip)
#define spl_inode_lock_shared(ip) inode_lock_shared(ip)
#define spl_inode_unlock_shared(ip) inode_unlock_shared(ip)
#define spl_inode_trylock(ip) inode_trylock(ip)
#define spl_inode_trylock_shared(ip) inode_trylock_shared(ip)
#define spl_inode_is_locked(ip) inode_is_locked(ip)
#define spl_inode_lock_nested(ip, s) inode_lock_nested(ip, s)
#else
#define spl_inode_lock(ip) mutex_lock(&(ip)->i_mutex)
#define spl_inode_unlock(ip) mutex_unlock(&(ip)->i_mutex)
#define spl_inode_lock_shared(ip) mutex_lock(&(ip)->i_mutex)
#define spl_inode_unlock_shared(ip) mutex_unlock(&(ip)->i_mutex)
#define spl_inode_trylock(ip) mutex_trylock(&(ip)->i_mutex)
#define spl_inode_trylock_shared(ip) mutex_trylock(&(ip)->i_mutex)
#define spl_inode_is_locked(ip) mutex_is_locked(&(ip)->i_mutex)
#define spl_inode_lock_nested(ip, s) mutex_lock_nested(&(ip)->i_mutex, s)
#endif
#endif /* SPL_FILE_COMPAT_H */
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