[mirror_zfs.git] / include / linux / xattr_compat.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (C) 2011 Lawrence Livermore National Security, LLC.
 */

#ifndef _ZFS_XATTR_H
#define	_ZFS_XATTR_H

#include <linux/posix_acl_xattr.h>

/*
 * 2.6.35 API change,
 * The const keyword was added to the 'struct xattr_handler' in the
 * generic Linux super_block structure.  To handle this we define an
 * appropriate xattr_handler_t typedef which can be used.  This was
 * the preferred solution because it keeps the code clean and readable.
 */
#ifdef HAVE_CONST_XATTR_HANDLER
typedef const struct xattr_handler	xattr_handler_t;
#else
typedef struct xattr_handler		xattr_handler_t;
#endif

/*
 * 3.7 API change,
 * Preferred XATTR_NAME_* definitions introduced, these are mapped to
 * the previous definitions for older kernels.
 */
#ifndef XATTR_NAME_POSIX_ACL_DEFAULT
#define	XATTR_NAME_POSIX_ACL_DEFAULT	POSIX_ACL_XATTR_DEFAULT
#endif

#ifndef XATTR_NAME_POSIX_ACL_ACCESS
#define	XATTR_NAME_POSIX_ACL_ACCESS	POSIX_ACL_XATTR_ACCESS
#endif

/*
 * 4.5 API change,
 */
#if defined(HAVE_XATTR_LIST_SIMPLE)
#define	ZPL_XATTR_LIST_WRAPPER(fn)					\
static bool								\
fn(struct dentry *dentry)						\
{									\
	return (!!__ ## fn(dentry->d_inode, NULL, 0, NULL, 0));		\
}
/*
 * 4.4 API change,
 */
#elif defined(HAVE_XATTR_LIST_DENTRY)
#define	ZPL_XATTR_LIST_WRAPPER(fn)					\
static size_t								\
fn(struct dentry *dentry, char *list, size_t list_size,			\
    const char *name, size_t name_len, int type)			\
{									\
	return (__ ## fn(dentry->d_inode,				\
	    list, list_size, name, name_len));				\
}
/*
 * 2.6.33 API change,
 */
#elif defined(HAVE_XATTR_LIST_HANDLER)
#define	ZPL_XATTR_LIST_WRAPPER(fn)					\
static size_t								\
fn(const struct xattr_handler *handler, struct dentry *dentry,		\
    char *list, size_t list_size, const char *name, size_t name_len)	\
{									\
	return (__ ## fn(dentry->d_inode,				\
	    list, list_size, name, name_len));				\
}
/*
 * 2.6.32 API
 */
#elif defined(HAVE_XATTR_LIST_INODE)
#define	ZPL_XATTR_LIST_WRAPPER(fn)					\
static size_t								\
fn(struct inode *ip, char *list, size_t list_size,			\
    const char *name, size_t name_len)					\
{									\
	return (__ ## fn(ip, list, list_size, name, name_len));		\
}
#endif

/*
 * 4.4 API change,
 * The xattr_handler->get() callback was changed to take a xattr_handler,
 * and handler_flags argument was removed and should be accessed by
 * handler->flags.
 */
#if defined(HAVE_XATTR_GET_HANDLER)
#define	ZPL_XATTR_GET_WRAPPER(fn)					\
static int								\
fn(const struct xattr_handler *handler, struct dentry *dentry,		\
    const char *name, void *buffer, size_t size)			\
{									\
	return (__ ## fn(dentry->d_inode, name, buffer, size));		\
}
/*
 * 2.6.33 API change,
 * The xattr_handler->get() callback was changed to take a dentry
 * instead of an inode, and a handler_flags argument was added.
 */
#elif defined(HAVE_XATTR_GET_DENTRY)
#define	ZPL_XATTR_GET_WRAPPER(fn)					\
static int								\
fn(struct dentry *dentry, const char *name, void *buffer, size_t size,	\
    int unused_handler_flags)						\
{									\
	return (__ ## fn(dentry->d_inode, name, buffer, size));		\
}
/*
 * 2.6.32 API
 */
#elif defined(HAVE_XATTR_GET_INODE)
#define	ZPL_XATTR_GET_WRAPPER(fn)					\
static int								\
fn(struct inode *ip, const char *name, void *buffer, size_t size)	\
{									\
	return (__ ## fn(ip, name, buffer, size));			\
}
#endif

/*
 * 4.4 API change,
 * The xattr_handler->set() callback was changed to take a xattr_handler,
 * and handler_flags argument was removed and should be accessed by
 * handler->flags.
 */
#if defined(HAVE_XATTR_SET_HANDLER)
#define	ZPL_XATTR_SET_WRAPPER(fn)					\
static int								\
fn(const struct xattr_handler *handler, struct dentry *dentry,		\
    const char *name, const void *buffer, size_t size, int flags)	\
{									\
	return (__ ## fn(dentry->d_inode, name, buffer, size, flags));	\
}
/*
 * 2.6.33 API change,
 * The xattr_handler->set() callback was changed to take a dentry
 * instead of an inode, and a handler_flags argument was added.
 */
#elif defined(HAVE_XATTR_SET_DENTRY)
#define	ZPL_XATTR_SET_WRAPPER(fn)					\
static int								\
fn(struct dentry *dentry, const char *name, const void *buffer,		\
    size_t size, int flags, int unused_handler_flags)			\
{									\
	return (__ ## fn(dentry->d_inode, name, buffer, size, flags));	\
}
/*
 * 2.6.32 API
 */
#elif defined(HAVE_XATTR_SET_INODE)
#define	ZPL_XATTR_SET_WRAPPER(fn)					\
static int								\
fn(struct inode *ip, const char *name, const void *buffer,		\
    size_t size, int flags)						\
{									\
	return (__ ## fn(ip, name, buffer, size, flags));		\
}
#endif

#ifdef HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY
#define	zpl_security_inode_init_security(ip, dip, qstr, nm, val, len)	\
	security_inode_init_security(ip, dip, qstr, nm, val, len)
#else
#define	zpl_security_inode_init_security(ip, dip, qstr, nm, val, len)	\
	security_inode_init_security(ip, dip, nm, val, len)
#endif /* HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY */

/*
 * Linux 3.7 API change. posix_acl_{from,to}_xattr gained the user_ns
 * parameter.  For the HAVE_POSIX_ACL_FROM_XATTR_USERNS version the
 * userns _may_ not be correct because it's used outside the RCU.
 */
#ifdef HAVE_POSIX_ACL_FROM_XATTR_USERNS
static inline struct posix_acl *
zpl_acl_from_xattr(const void *value, int size)
{
	return (posix_acl_from_xattr(CRED()->user_ns, value, size));
}

static inline int
zpl_acl_to_xattr(struct posix_acl *acl, void *value, int size)
{
	return (posix_acl_to_xattr(CRED()->user_ns, acl, value, size));
}

#else

static inline struct posix_acl *
zpl_acl_from_xattr(const void *value, int size)
{
	return (posix_acl_from_xattr(value, size));
}

static inline int
zpl_acl_to_xattr(struct posix_acl *acl, void *value, int size)
{
	return (posix_acl_to_xattr(acl, value, size));
}
#endif /* HAVE_POSIX_ACL_FROM_XATTR_USERNS */

#endif /* _ZFS_XATTR_H */
Commit	Line	Data
777d4af8 BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21
	22	/*
	23	* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
	24	*/
	25
	26	#ifndef _ZFS_XATTR_H
d1d7e268	27	#define _ZFS_XATTR_H
777d4af8	28
023699cd MM	29	#include <linux/posix_acl_xattr.h>
023699cd MM	30
777d4af8 BB	31	/*
	32	* 2.6.35 API change,
	33	* The const keyword was added to the 'struct xattr_handler' in the
	34	* generic Linux super_block structure. To handle this we define an
	35	* appropriate xattr_handler_t typedef which can be used. This was
	36	* the preferred solution because it keeps the code clean and readable.
	37	*/
	38	#ifdef HAVE_CONST_XATTR_HANDLER
	39	typedef const struct xattr_handler xattr_handler_t;
	40	#else
	41	typedef struct xattr_handler xattr_handler_t;
	42	#endif
	43
4967a3eb BB	44	/*
	45	* 3.7 API change,
	46	* Preferred XATTR_NAME_* definitions introduced, these are mapped to
	47	* the previous definitions for older kernels.
	48	*/
	49	#ifndef XATTR_NAME_POSIX_ACL_DEFAULT
	50	#define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
	51	#endif
	52
	53	#ifndef XATTR_NAME_POSIX_ACL_ACCESS
	54	#define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
	55	#endif
	56
	57	/*
	58	* 4.5 API change,
	59	*/
	60	#if defined(HAVE_XATTR_LIST_SIMPLE)
	61	#define ZPL_XATTR_LIST_WRAPPER(fn) \
	62	static bool \
	63	fn(struct dentry *dentry) \
	64	{ \
	65	return (!!__ ## fn(dentry->d_inode, NULL, 0, NULL, 0)); \
	66	}
	67	/*
	68	* 4.4 API change,
	69	*/
	70	#elif defined(HAVE_XATTR_LIST_DENTRY)
	71	#define ZPL_XATTR_LIST_WRAPPER(fn) \
	72	static size_t \
	73	fn(struct dentry dentry, char list, size_t list_size, \
	74	const char *name, size_t name_len, int type) \
	75	{ \
	76	return (__ ## fn(dentry->d_inode, \
	77	list, list_size, name, name_len)); \
	78	}
f9637c6c BB	79	/*
f9637c6c BB	80	* 2.6.33 API change,
f9637c6c	81	*/
4967a3eb BB	82	#elif defined(HAVE_XATTR_LIST_HANDLER)
	83	#define ZPL_XATTR_LIST_WRAPPER(fn) \
	84	static size_t \
	85	fn(const struct xattr_handler handler, struct dentry dentry, \
	86	char list, size_t list_size, const char name, size_t name_len) \
f9637c6c	87	{ \
4967a3eb BB	88	return (__ ## fn(dentry->d_inode, \
	89	list, list_size, name, name_len)); \
	90	}
	91	/*
	92	* 2.6.32 API
	93	*/
	94	#elif defined(HAVE_XATTR_LIST_INODE)
	95	#define ZPL_XATTR_LIST_WRAPPER(fn) \
	96	static size_t \
	97	fn(struct inode ip, char list, size_t list_size, \
	98	const char *name, size_t name_len) \
	99	{ \
	100	return (__ ## fn(ip, list, list_size, name, name_len)); \
f9637c6c	101	}
4967a3eb BB	102	#endif
4967a3eb BB	103
61d482f7 CC	104	/*
61d482f7 CC	105	* 4.4 API change,
4967a3eb	106	* The xattr_handler->get() callback was changed to take a xattr_handler,
61d482f7 CC	107	* and handler_flags argument was removed and should be accessed by
	108	* handler->flags.
	109	*/
4967a3eb	110	#if defined(HAVE_XATTR_GET_HANDLER)
61d482f7 CC	111	#define ZPL_XATTR_GET_WRAPPER(fn) \
	112	static int \
	113	fn(const struct xattr_handler handler, struct dentry dentry, \
	114	const char name, void buffer, size_t size) \
	115	{ \
	116	return (__ ## fn(dentry->d_inode, name, buffer, size)); \
	117	}
4967a3eb BB	118	/*
	119	* 2.6.33 API change,
	120	* The xattr_handler->get() callback was changed to take a dentry
	121	* instead of an inode, and a handler_flags argument was added.
	122	*/
	123	#elif defined(HAVE_XATTR_GET_DENTRY)
d1d7e268	124	#define ZPL_XATTR_GET_WRAPPER(fn) \
f9637c6c	125	static int \
4967a3eb BB	126	fn(struct dentry dentry, const char name, void *buffer, size_t size, \
4967a3eb BB	127	int unused_handler_flags) \
f9637c6c	128	{ \
4967a3eb	129	return (__ ## fn(dentry->d_inode, name, buffer, size)); \
f9637c6c	130	}
f9637c6c	131	/*
4967a3eb	132	* 2.6.32 API
f9637c6c	133	*/
4967a3eb BB	134	#elif defined(HAVE_XATTR_GET_INODE)
4967a3eb BB	135	#define ZPL_XATTR_GET_WRAPPER(fn) \
f9637c6c	136	static int \
4967a3eb	137	fn(struct inode ip, const char name, void *buffer, size_t size) \
f9637c6c	138	{ \
4967a3eb	139	return (__ ## fn(ip, name, buffer, size)); \
f9637c6c	140	}
4967a3eb BB	141	#endif
4967a3eb BB	142
61d482f7 CC	143	/*
61d482f7 CC	144	* 4.4 API change,
4967a3eb	145	* The xattr_handler->set() callback was changed to take a xattr_handler,
61d482f7 CC	146	* and handler_flags argument was removed and should be accessed by
	147	* handler->flags.
	148	*/
4967a3eb	149	#if defined(HAVE_XATTR_SET_HANDLER)
61d482f7 CC	150	#define ZPL_XATTR_SET_WRAPPER(fn) \
	151	static int \
	152	fn(const struct xattr_handler handler, struct dentry dentry, \
	153	const char name, const void buffer, size_t size, int flags) \
	154	{ \
	155	return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
	156	}
4967a3eb BB	157	/*
	158	* 2.6.33 API change,
	159	* The xattr_handler->set() callback was changed to take a dentry
	160	* instead of an inode, and a handler_flags argument was added.
	161	*/
	162	#elif defined(HAVE_XATTR_SET_DENTRY)
	163	#define ZPL_XATTR_SET_WRAPPER(fn) \
	164	static int \
	165	fn(struct dentry dentry, const char name, const void *buffer, \
	166	size_t size, int flags, int unused_handler_flags) \
	167	{ \
	168	return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
	169	}
	170	/*
	171	* 2.6.32 API
	172	*/
	173	#elif defined(HAVE_XATTR_SET_INODE)
d1d7e268	174	#define ZPL_XATTR_SET_WRAPPER(fn) \
f9637c6c BB	175	static int \
	176	fn(struct inode ip, const char name, const void *buffer, \
	177	size_t size, int flags) \
	178	{ \
d1d7e268	179	return (__ ## fn(ip, name, buffer, size, flags)); \
f9637c6c	180	}
4967a3eb	181	#endif
f9637c6c	182
5c03efc3	183	#ifdef HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY
d1d7e268	184	#define zpl_security_inode_init_security(ip, dip, qstr, nm, val, len) \
5c03efc3 BB	185	security_inode_init_security(ip, dip, qstr, nm, val, len)
5c03efc3 BB	186	#else
d1d7e268	187	#define zpl_security_inode_init_security(ip, dip, qstr, nm, val, len) \
5c03efc3 BB	188	security_inode_init_security(ip, dip, nm, val, len)
	189	#endif /* HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY */
	190
023699cd MM	191	/*
	192	* Linux 3.7 API change. posix_acl_{from,to}_xattr gained the user_ns
	193	* parameter. For the HAVE_POSIX_ACL_FROM_XATTR_USERNS version the
	194	* userns _may_ not be correct because it's used outside the RCU.
	195	*/
	196	#ifdef HAVE_POSIX_ACL_FROM_XATTR_USERNS
	197	static inline struct posix_acl *
	198	zpl_acl_from_xattr(const void *value, int size)
	199	{
d1d7e268	200	return (posix_acl_from_xattr(CRED()->user_ns, value, size));
023699cd MM	201	}
	202
	203	static inline int
	204	zpl_acl_to_xattr(struct posix_acl acl, void value, int size)
	205	{
d1d7e268	206	return (posix_acl_to_xattr(CRED()->user_ns, acl, value, size));
023699cd MM	207	}
	208
	209	#else
	210
	211	static inline struct posix_acl *
d1d7e268	212	zpl_acl_from_xattr(const void *value, int size)
023699cd	213	{
d1d7e268	214	return (posix_acl_from_xattr(value, size));
023699cd MM	215	}
	216
	217	static inline int
	218	zpl_acl_to_xattr(struct posix_acl acl, void value, int size)
	219	{
d1d7e268	220	return (posix_acl_to_xattr(acl, value, size));
023699cd MM	221	}
	222	#endif /* HAVE_POSIX_ACL_FROM_XATTR_USERNS */
	223
777d4af8	224	#endif /* _ZFS_XATTR_H */