[mirror_spl.git] / include / linux / file_compat.h

/*
 *  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>
#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);
}

#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 */
Commit	Line	Data
4b393c50	1	/*
716154c5 BB	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.
3d6af2dd	9	* For details, see <http://zfsonlinux.org/>.
716154c5 BB	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/>.
4b393c50	23	*/
716154c5	24
86de8532	25	#ifndef _SPL_FILE_COMPAT_H
ce319db5	26	#define _SPL_FILE_COMPAT_H
86de8532	27
55abb092	28	#include <linux/fs.h>
86de8532	29	#ifdef HAVE_FDTABLE_HEADER
	30	#include <linux/fdtable.h>
	31	#endif
	32
f0ff89fc BB	33	static inline struct file *
	34	spl_filp_open(const char name, int flags, int mode, int err)
	35	{
ce319db5 OF	36	struct file *filp = NULL;
ce319db5 OF	37	int rc;
f0ff89fc	38
ce319db5 OF	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);
f0ff89fc BB	47	}
f0ff89fc BB	48
ce319db5 OF	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)
f0ff89fc	52
1c7b3eaf BB	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
dcf91382	62	#ifdef HAVE_INODE_FALLOCATE
1c7b3eaf BB	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);
dcf91382	67	#endif /* HAVE_INODE_FALLOCATE */
ce319db5	68	#endif /* HAVE_FILE_FALLOCATE */
1c7b3eaf BB	69
	70	return (error);
	71	}
	72
dcf91382 BB	73	#ifdef HAVE_2ARGS_VFS_FSYNC
dcf91382 BB	74	#define spl_filp_fsync(fp, sync) vfs_fsync(fp, sync)
f0ff89fc	75	#else
dcf91382 BB	76	#define spl_filp_fsync(fp, sync) vfs_fsync(fp, (fp)->f_dentry, sync)
dcf91382 BB	77	#endif /* HAVE_2ARGS_VFS_FSYNC */
f0ff89fc	78
fdbc1ba9 CC	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)
2bc5666f	90	#define spl_inode_unlock(ip) mutex_unlock(&(ip)->i_mutex)
fdbc1ba9 CC	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
6bf4d76f	98
86de8532	99	#endif /* SPL_FILE_COMPAT_H */