[mirror_zfs-debian.git] / include / linux / vfs_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.
 * Copyright (C) 2015 Jörg Thalheim.
 */

#ifndef _ZFS_VFS_H
#define	_ZFS_VFS_H

#include <sys/taskq.h>
#include <linux/backing-dev.h>

/*
 * 2.6.28 API change,
 * Added insert_inode_locked() helper function, prior to this most callers
 * used insert_inode_hash().  The older method doesn't check for collisions
 * in the inode_hashtable but it still acceptible for use.
 */
#ifndef HAVE_INSERT_INODE_LOCKED
static inline int
insert_inode_locked(struct inode *ip)
{
	insert_inode_hash(ip);
	return (0);
}
#endif /* HAVE_INSERT_INODE_LOCKED */

/*
 * 2.6.35 API change,
 * Add truncate_setsize() if it is not exported by the Linux kernel.
 *
 * Truncate the inode and pages associated with the inode. The pages are
 * unmapped and removed from cache.
 */
#ifndef HAVE_TRUNCATE_SETSIZE
static inline void
truncate_setsize(struct inode *ip, loff_t new)
{
	struct address_space *mapping = ip->i_mapping;

	i_size_write(ip, new);

	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
	truncate_inode_pages(mapping, new);
	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
}
#endif /* HAVE_TRUNCATE_SETSIZE */

/*
 * 2.6.32 - 2.6.33, bdi_setup_and_register() is not available.
 * 2.6.34 - 3.19, bdi_setup_and_register() takes 3 arguments.
 * 4.0 - x.y, bdi_setup_and_register() takes 2 arguments.
 */
#if defined(HAVE_2ARGS_BDI_SETUP_AND_REGISTER)
static inline int
zpl_bdi_setup_and_register(struct backing_dev_info *bdi, char *name)
{
	return (bdi_setup_and_register(bdi, name));
}
#elif defined(HAVE_3ARGS_BDI_SETUP_AND_REGISTER)
static inline int
zpl_bdi_setup_and_register(struct backing_dev_info *bdi, char *name)
{
	return (bdi_setup_and_register(bdi, name, BDI_CAP_MAP_COPY));
}
#else
extern atomic_long_t zfs_bdi_seq;

static inline int
zpl_bdi_setup_and_register(struct backing_dev_info *bdi, char *name)
{
	char tmp[32];
	int error;

	bdi->name = name;
	bdi->capabilities = BDI_CAP_MAP_COPY;

	error = bdi_init(bdi);
	if (error)
		return (error);

	sprintf(tmp, "%.28s%s", name, "-%d");
	error = bdi_register(bdi, NULL, tmp,
	    atomic_long_inc_return(&zfs_bdi_seq));
	if (error) {
		bdi_destroy(bdi);
		return (error);
	}

	return (error);
}
#endif

/*
 * 2.6.38 API change,
 * LOOKUP_RCU flag introduced to distinguish rcu-walk from ref-walk cases.
 */
#ifndef LOOKUP_RCU
#define	LOOKUP_RCU	0x0
#endif /* LOOKUP_RCU */

/*
 * 3.2-rc1 API change,
 * Add set_nlink() if it is not exported by the Linux kernel.
 *
 * i_nlink is read-only in Linux 3.2, but it can be set directly in
 * earlier kernels.
 */
#ifndef HAVE_SET_NLINK
static inline void
set_nlink(struct inode *inode, unsigned int nlink)
{
	inode->i_nlink = nlink;
}
#endif /* HAVE_SET_NLINK */

/*
 * 3.3 API change,
 * The VFS .create, .mkdir and .mknod callbacks were updated to take a
 * umode_t type rather than an int.  To cleanly handle both definitions
 * the zpl_umode_t type is introduced and set accordingly.
 */
#ifdef HAVE_MKDIR_UMODE_T
typedef	umode_t		zpl_umode_t;
#else
typedef	int		zpl_umode_t;
#endif

/*
 * 3.5 API change,
 * The clear_inode() function replaces end_writeback() and introduces an
 * ordering change regarding when the inode_sync_wait() occurs.  See the
 * configure check in config/kernel-clear-inode.m4 for full details.
 */
#if defined(HAVE_EVICT_INODE) && !defined(HAVE_CLEAR_INODE)
#define	clear_inode(ip)		end_writeback(ip)
#endif /* HAVE_EVICT_INODE && !HAVE_CLEAR_INODE */

/*
 * 3.6 API change,
 * The sget() helper function now takes the mount flags as an argument.
 */
#ifdef HAVE_5ARG_SGET
#define	zpl_sget(type, cmp, set, fl, mtd)	sget(type, cmp, set, fl, mtd)
#else
#define	zpl_sget(type, cmp, set, fl, mtd)	sget(type, cmp, set, mtd)
#endif /* HAVE_5ARG_SGET */

#if defined(SEEK_HOLE) && defined(SEEK_DATA) && !defined(HAVE_LSEEK_EXECUTE)
static inline loff_t
lseek_execute(
	struct file *filp,
	struct inode *inode,
	loff_t offset,
	loff_t maxsize)
{
	if (offset < 0 && !(filp->f_mode & FMODE_UNSIGNED_OFFSET))
		return (-EINVAL);

	if (offset > maxsize)
		return (-EINVAL);

	if (offset != filp->f_pos) {
		spin_lock(&filp->f_lock);
		filp->f_pos = offset;
		filp->f_version = 0;
		spin_unlock(&filp->f_lock);
	}

	return (offset);
}
#endif /* SEEK_HOLE && SEEK_DATA && !HAVE_LSEEK_EXECUTE */

#if defined(CONFIG_FS_POSIX_ACL)
/*
 * These functions safely approximates the behavior of posix_acl_release()
 * which cannot be used because it calls the GPL-only symbol kfree_rcu().
 * The in-kernel version, which can access the RCU, frees the ACLs after
 * the grace period expires.  Because we're unsure how long that grace
 * period may be this implementation conservatively delays for 60 seconds.
 * This is several orders of magnitude larger than expected grace period.
 * At 60 seconds the kernel will also begin issuing RCU stall warnings.
 */
#include <linux/posix_acl.h>

#if defined(HAVE_POSIX_ACL_RELEASE) && !defined(HAVE_POSIX_ACL_RELEASE_GPL_ONLY)
#define	zpl_posix_acl_release(arg)		posix_acl_release(arg)
#else
void zpl_posix_acl_release_impl(struct posix_acl *);

static inline void
zpl_posix_acl_release(struct posix_acl *acl)
{
	if ((acl == NULL) || (acl == ACL_NOT_CACHED))
		return;

	if (atomic_dec_and_test(&acl->a_refcount))
		zpl_posix_acl_release_impl(acl);
}
#endif /* HAVE_POSIX_ACL_RELEASE */

#ifdef HAVE_SET_CACHED_ACL_USABLE
#define	zpl_set_cached_acl(ip, ty, n)		set_cached_acl(ip, ty, n)
#define	zpl_forget_cached_acl(ip, ty)		forget_cached_acl(ip, ty)
#else
static inline void
zpl_set_cached_acl(struct inode *ip, int type, struct posix_acl *newer) {
	struct posix_acl *older = NULL;

	spin_lock(&ip->i_lock);

	if ((newer != ACL_NOT_CACHED) && (newer != NULL))
		posix_acl_dup(newer);

	switch (type) {
	case ACL_TYPE_ACCESS:
		older = ip->i_acl;
		rcu_assign_pointer(ip->i_acl, newer);
		break;
	case ACL_TYPE_DEFAULT:
		older = ip->i_default_acl;
		rcu_assign_pointer(ip->i_default_acl, newer);
		break;
	}

	spin_unlock(&ip->i_lock);

	zpl_posix_acl_release(older);
}

static inline void
zpl_forget_cached_acl(struct inode *ip, int type) {
	zpl_set_cached_acl(ip, type, (struct posix_acl *)ACL_NOT_CACHED);
}
#endif /* HAVE_SET_CACHED_ACL_USABLE */

#ifndef HAVE___POSIX_ACL_CHMOD
#ifdef HAVE_POSIX_ACL_CHMOD
#define	__posix_acl_chmod(acl, gfp, mode)	posix_acl_chmod(acl, gfp, mode)
#define	__posix_acl_create(acl, gfp, mode)	posix_acl_create(acl, gfp, mode)
#else
static inline int
__posix_acl_chmod(struct posix_acl **acl, int flags, umode_t umode) {
	struct posix_acl *oldacl = *acl;
	mode_t mode = umode;
	int error;

	*acl = posix_acl_clone(*acl, flags);
	zpl_posix_acl_release(oldacl);

	if (!(*acl))
		return (-ENOMEM);

	error = posix_acl_chmod_masq(*acl, mode);
	if (error) {
		zpl_posix_acl_release(*acl);
		*acl = NULL;
	}

	return (error);
}

static inline int
__posix_acl_create(struct posix_acl **acl, int flags, umode_t *umodep) {
	struct posix_acl *oldacl = *acl;
	mode_t mode = *umodep;
	int error;

	*acl = posix_acl_clone(*acl, flags);
	zpl_posix_acl_release(oldacl);

	if (!(*acl))
		return (-ENOMEM);

	error = posix_acl_create_masq(*acl, &mode);
	*umodep = mode;

	if (error < 0) {
		zpl_posix_acl_release(*acl);
		*acl = NULL;
	}

	return (error);
}
#endif /* HAVE_POSIX_ACL_CHMOD */
#endif /* HAVE___POSIX_ACL_CHMOD */

#ifdef HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T
typedef umode_t zpl_equivmode_t;
#else
typedef mode_t zpl_equivmode_t;
#endif /* HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T */

/*
 * 4.8 API change,
 * posix_acl_valid() now must be passed a namespace, the namespace from
 * from super block associated with the given inode is used for this purpose.
 */
#ifdef HAVE_POSIX_ACL_VALID_WITH_NS
#define	zpl_posix_acl_valid(ip, acl)  posix_acl_valid(ip->i_sb->s_user_ns, acl)
#else
#define	zpl_posix_acl_valid(ip, acl)  posix_acl_valid(acl)
#endif

#endif /* CONFIG_FS_POSIX_ACL */

/*
 * 2.6.38 API change,
 * The is_owner_or_cap() function was renamed to inode_owner_or_capable().
 */
#ifdef HAVE_INODE_OWNER_OR_CAPABLE
#define	zpl_inode_owner_or_capable(ip)		inode_owner_or_capable(ip)
#else
#define	zpl_inode_owner_or_capable(ip)		is_owner_or_cap(ip)
#endif /* HAVE_INODE_OWNER_OR_CAPABLE */

/*
 * 3.19 API change
 * struct access f->f_dentry->d_inode was replaced by accessor function
 * file_inode(f)
 */
#ifndef HAVE_FILE_INODE
static inline struct inode *file_inode(const struct file *f)
{
	return (f->f_dentry->d_inode);
}
#endif /* HAVE_FILE_INODE */

/*
 * 2.6.38 API change
 */
#ifdef HAVE_FOLLOW_DOWN_ONE
#define	zpl_follow_down_one(path)		follow_down_one(path)
#define	zpl_follow_up(path)			follow_up(path)
#else
#define	zpl_follow_down_one(path)		follow_down(path)
#define	zpl_follow_up(path)			follow_up(path)
#endif

/*
 * 4.9 API change
 */
#ifndef HAVE_SETATTR_PREPARE
static inline int
setattr_prepare(struct dentry *dentry, struct iattr *ia)
{
	return (inode_change_ok(dentry->d_inode, ia));
}
#endif

#endif /* _ZFS_VFS_H */
Commit	Line	Data
7268e1be 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.
ea04106b	24	* Copyright (C) 2015 Jörg Thalheim.
7268e1be BB	25	*/
	26
	27	#ifndef _ZFS_VFS_H
a08ee875	28	#define _ZFS_VFS_H
7268e1be	29
ea04106b	30	#include <sys/taskq.h>
e10b0808	31	#include <linux/backing-dev.h>
ea04106b	32
bdf4328b BB	33	/*
	34	* 2.6.28 API change,
	35	* Added insert_inode_locked() helper function, prior to this most callers
	36	* used insert_inode_hash(). The older method doesn't check for collisions
	37	* in the inode_hashtable but it still acceptible for use.
	38	*/
	39	#ifndef HAVE_INSERT_INODE_LOCKED
	40	static inline int
	41	insert_inode_locked(struct inode *ip)
	42	{
	43	insert_inode_hash(ip);
	44	return (0);
	45	}
	46	#endif /* HAVE_INSERT_INODE_LOCKED */
7268e1be	47
b3129792 PJ	48	/*
	49	* 2.6.35 API change,
	50	* Add truncate_setsize() if it is not exported by the Linux kernel.
	51	*
	52	* Truncate the inode and pages associated with the inode. The pages are
	53	* unmapped and removed from cache.
	54	*/
	55	#ifndef HAVE_TRUNCATE_SETSIZE
	56	static inline void
	57	truncate_setsize(struct inode *ip, loff_t new)
	58	{
	59	struct address_space *mapping = ip->i_mapping;
	60
	61	i_size_write(ip, new);
	62
	63	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
	64	truncate_inode_pages(mapping, new);
	65	unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
	66	}
	67	#endif /* HAVE_TRUNCATE_SETSIZE */
	68
76659dc1	69	/*
ea04106b AX	70	* 2.6.32 - 2.6.33, bdi_setup_and_register() is not available.
	71	* 2.6.34 - 3.19, bdi_setup_and_register() takes 3 arguments.
	72	* 4.0 - x.y, bdi_setup_and_register() takes 2 arguments.
76659dc1	73	*/
ea04106b AX	74	#if defined(HAVE_2ARGS_BDI_SETUP_AND_REGISTER)
	75	static inline int
	76	zpl_bdi_setup_and_register(struct backing_dev_info bdi, char name)
	77	{
	78	return (bdi_setup_and_register(bdi, name));
	79	}
	80	#elif defined(HAVE_3ARGS_BDI_SETUP_AND_REGISTER)
	81	static inline int
	82	zpl_bdi_setup_and_register(struct backing_dev_info bdi, char name)
	83	{
	84	return (bdi_setup_and_register(bdi, name, BDI_CAP_MAP_COPY));
	85	}
	86	#else
5547c2f1 BB	87	extern atomic_long_t zfs_bdi_seq;
	88
	89	static inline int
ea04106b	90	zpl_bdi_setup_and_register(struct backing_dev_info bdi, char name)
5547c2f1 BB	91	{
	92	char tmp[32];
	93	int error;
	94
	95	bdi->name = name;
ea04106b AX	96	bdi->capabilities = BDI_CAP_MAP_COPY;
ea04106b AX	97
5547c2f1 BB	98	error = bdi_init(bdi);
	99	if (error)
	100	return (error);
	101
	102	sprintf(tmp, "%.28s%s", name, "-%d");
	103	error = bdi_register(bdi, NULL, tmp,
	104	atomic_long_inc_return(&zfs_bdi_seq));
	105	if (error) {
	106	bdi_destroy(bdi);
	107	return (error);
	108	}
	109
	110	return (error);
	111	}
ea04106b	112	#endif
76659dc1	113
7b3e34ba BB	114	/*
	115	* 2.6.38 API change,
	116	* LOOKUP_RCU flag introduced to distinguish rcu-walk from ref-walk cases.
	117	*/
	118	#ifndef LOOKUP_RCU
a08ee875	119	#define LOOKUP_RCU 0x0
7b3e34ba BB	120	#endif /* LOOKUP_RCU */
7b3e34ba BB	121
28eb9213 DH	122	/*
	123	* 3.2-rc1 API change,
	124	* Add set_nlink() if it is not exported by the Linux kernel.
	125	*
	126	* i_nlink is read-only in Linux 3.2, but it can be set directly in
	127	* earlier kernels.
	128	*/
	129	#ifndef HAVE_SET_NLINK
	130	static inline void
	131	set_nlink(struct inode *inode, unsigned int nlink)
	132	{
	133	inode->i_nlink = nlink;
	134	}
	135	#endif /* HAVE_SET_NLINK */
	136
b39d3b9f BB	137	/*
	138	* 3.3 API change,
	139	* The VFS .create, .mkdir and .mknod callbacks were updated to take a
	140	* umode_t type rather than an int. To cleanly handle both definitions
	141	* the zpl_umode_t type is introduced and set accordingly.
	142	*/
95f5c63b	143	#ifdef HAVE_MKDIR_UMODE_T
b39d3b9f BB	144	typedef umode_t zpl_umode_t;
	145	#else
	146	typedef int zpl_umode_t;
	147	#endif
	148
739a1a82 RY	149	/*
	150	* 3.5 API change,
	151	* The clear_inode() function replaces end_writeback() and introduces an
	152	* ordering change regarding when the inode_sync_wait() occurs. See the
	153	* configure check in config/kernel-clear-inode.m4 for full details.
	154	*/
	155	#if defined(HAVE_EVICT_INODE) && !defined(HAVE_CLEAR_INODE)
a08ee875	156	#define clear_inode(ip) end_writeback(ip)
739a1a82 RY	157	#endif /* HAVE_EVICT_INODE && !HAVE_CLEAR_INODE */
739a1a82 RY	158
3c203610 YS	159	/*
	160	* 3.6 API change,
	161	* The sget() helper function now takes the mount flags as an argument.
	162	*/
	163	#ifdef HAVE_5ARG_SGET
a08ee875	164	#define zpl_sget(type, cmp, set, fl, mtd) sget(type, cmp, set, fl, mtd)
3c203610	165	#else
a08ee875	166	#define zpl_sget(type, cmp, set, fl, mtd) sget(type, cmp, set, mtd)
3c203610 YS	167	#endif /* HAVE_5ARG_SGET */
3c203610 YS	168
c06d4368 AX	169	#if defined(SEEK_HOLE) && defined(SEEK_DATA) && !defined(HAVE_LSEEK_EXECUTE)
c06d4368 AX	170	static inline loff_t
a08ee875 LG	171	lseek_execute(
	172	struct file *filp,
	173	struct inode *inode,
	174	loff_t offset,
	175	loff_t maxsize)
c06d4368 AX	176	{
	177	if (offset < 0 && !(filp->f_mode & FMODE_UNSIGNED_OFFSET))
	178	return (-EINVAL);
	179
	180	if (offset > maxsize)
	181	return (-EINVAL);
	182
	183	if (offset != filp->f_pos) {
	184	spin_lock(&filp->f_lock);
	185	filp->f_pos = offset;
	186	filp->f_version = 0;
	187	spin_unlock(&filp->f_lock);
	188	}
	189
	190	return (offset);
	191	}
	192	#endif /* SEEK_HOLE && SEEK_DATA && !HAVE_LSEEK_EXECUTE */
	193
a08ee875 LG	194	#if defined(CONFIG_FS_POSIX_ACL)
	195	/*
	196	* These functions safely approximates the behavior of posix_acl_release()
	197	* which cannot be used because it calls the GPL-only symbol kfree_rcu().
	198	* The in-kernel version, which can access the RCU, frees the ACLs after
	199	* the grace period expires. Because we're unsure how long that grace
	200	* period may be this implementation conservatively delays for 60 seconds.
	201	* This is several orders of magnitude larger than expected grace period.
	202	* At 60 seconds the kernel will also begin issuing RCU stall warnings.
	203	*/
	204	#include <linux/posix_acl.h>
a08ee875 LG	205
a08ee875 LG	206	#if defined(HAVE_POSIX_ACL_RELEASE) && !defined(HAVE_POSIX_ACL_RELEASE_GPL_ONLY)
a08ee875	207	#define zpl_posix_acl_release(arg) posix_acl_release(arg)
a08ee875	208	#else
68d83c55	209	void zpl_posix_acl_release_impl(struct posix_acl *);
a08ee875 LG	210
	211	static inline void
	212	zpl_posix_acl_release(struct posix_acl *acl)
	213	{
	214	if ((acl == NULL) \|\| (acl == ACL_NOT_CACHED))
	215	return;
	216
68d83c55 AX	217	if (atomic_dec_and_test(&acl->a_refcount))
68d83c55 AX	218	zpl_posix_acl_release_impl(acl);
a08ee875	219	}
68d83c55	220	#endif /* HAVE_POSIX_ACL_RELEASE */
a08ee875	221
68d83c55 AX	222	#ifdef HAVE_SET_CACHED_ACL_USABLE
	223	#define zpl_set_cached_acl(ip, ty, n) set_cached_acl(ip, ty, n)
	224	#define zpl_forget_cached_acl(ip, ty) forget_cached_acl(ip, ty)
	225	#else
a08ee875 LG	226	static inline void
a08ee875 LG	227	zpl_set_cached_acl(struct inode ip, int type, struct posix_acl newer) {
a08ee875 LG	228	struct posix_acl *older = NULL;
	229
	230	spin_lock(&ip->i_lock);
	231
	232	if ((newer != ACL_NOT_CACHED) && (newer != NULL))
	233	posix_acl_dup(newer);
	234
	235	switch (type) {
	236	case ACL_TYPE_ACCESS:
	237	older = ip->i_acl;
	238	rcu_assign_pointer(ip->i_acl, newer);
	239	break;
	240	case ACL_TYPE_DEFAULT:
	241	older = ip->i_default_acl;
	242	rcu_assign_pointer(ip->i_default_acl, newer);
	243	break;
	244	}
	245
	246	spin_unlock(&ip->i_lock);
	247
	248	zpl_posix_acl_release(older);
a08ee875 LG	249	}
	250
	251	static inline void
	252	zpl_forget_cached_acl(struct inode *ip, int type) {
	253	zpl_set_cached_acl(ip, type, (struct posix_acl *)ACL_NOT_CACHED);
	254	}
68d83c55	255	#endif /* HAVE_SET_CACHED_ACL_USABLE */
a08ee875	256
ea04106b AX	257	#ifndef HAVE___POSIX_ACL_CHMOD
	258	#ifdef HAVE_POSIX_ACL_CHMOD
	259	#define __posix_acl_chmod(acl, gfp, mode) posix_acl_chmod(acl, gfp, mode)
	260	#define __posix_acl_create(acl, gfp, mode) posix_acl_create(acl, gfp, mode)
a08ee875	261	#else
a08ee875	262	static inline int
ea04106b	263	__posix_acl_chmod(struct posix_acl **acl, int flags, umode_t umode) {
a08ee875 LG	264	struct posix_acl oldacl = acl;
	265	mode_t mode = umode;
	266	int error;
	267
	268	acl = posix_acl_clone(acl, flags);
	269	zpl_posix_acl_release(oldacl);
	270
	271	if (!(*acl))
	272	return (-ENOMEM);
	273
	274	error = posix_acl_chmod_masq(*acl, mode);
	275	if (error) {
	276	zpl_posix_acl_release(*acl);
	277	*acl = NULL;
	278	}
	279
	280	return (error);
	281	}
	282
	283	static inline int
ea04106b	284	__posix_acl_create(struct posix_acl *acl, int flags, umode_t umodep) {
a08ee875 LG	285	struct posix_acl oldacl = acl;
	286	mode_t mode = *umodep;
	287	int error;
	288
	289	acl = posix_acl_clone(acl, flags);
	290	zpl_posix_acl_release(oldacl);
	291
	292	if (!(*acl))
	293	return (-ENOMEM);
	294
	295	error = posix_acl_create_masq(*acl, &mode);
	296	*umodep = mode;
	297
	298	if (error < 0) {
	299	zpl_posix_acl_release(*acl);
	300	*acl = NULL;
	301	}
	302
	303	return (error);
	304	}
	305	#endif /* HAVE_POSIX_ACL_CHMOD */
ea04106b AX	306	#endif /* HAVE___POSIX_ACL_CHMOD */
	307
	308	#ifdef HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T
	309	typedef umode_t zpl_equivmode_t;
	310	#else
	311	typedef mode_t zpl_equivmode_t;
	312	#endif /* HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T */
a08ee875	313
87dac73d AX	314	/*
	315	* 4.8 API change,
	316	* posix_acl_valid() now must be passed a namespace, the namespace from
	317	* from super block associated with the given inode is used for this purpose.
	318	*/
	319	#ifdef HAVE_POSIX_ACL_VALID_WITH_NS
	320	#define zpl_posix_acl_valid(ip, acl) posix_acl_valid(ip->i_sb->s_user_ns, acl)
	321	#else
	322	#define zpl_posix_acl_valid(ip, acl) posix_acl_valid(acl)
	323	#endif
	324
	325	#endif /* CONFIG_FS_POSIX_ACL */
a08ee875	326
ea04106b AX	327	/*
	328	* 2.6.38 API change,
	329	* The is_owner_or_cap() function was renamed to inode_owner_or_capable().
	330	*/
	331	#ifdef HAVE_INODE_OWNER_OR_CAPABLE
	332	#define zpl_inode_owner_or_capable(ip) inode_owner_or_capable(ip)
a08ee875	333	#else
ea04106b AX	334	#define zpl_inode_owner_or_capable(ip) is_owner_or_cap(ip)
	335	#endif /* HAVE_INODE_OWNER_OR_CAPABLE */
	336
	337	/*
	338	* 3.19 API change
	339	* struct access f->f_dentry->d_inode was replaced by accessor function
	340	* file_inode(f)
	341	*/
	342	#ifndef HAVE_FILE_INODE
	343	static inline struct inode file_inode(const struct file f)
	344	{
	345	return (f->f_dentry->d_inode);
	346	}
	347	#endif /* HAVE_FILE_INODE */
a08ee875	348
e10b0808 AX	349	/*
	350	* 2.6.38 API change
	351	*/
	352	#ifdef HAVE_FOLLOW_DOWN_ONE
	353	#define zpl_follow_down_one(path) follow_down_one(path)
	354	#define zpl_follow_up(path) follow_up(path)
	355	#else
	356	#define zpl_follow_down_one(path) follow_down(path)
	357	#define zpl_follow_up(path) follow_up(path)
	358	#endif
	359
68d83c55 AX	360	/*
	361	* 4.9 API change
	362	*/
	363	#ifndef HAVE_SETATTR_PREPARE
	364	static inline int
	365	setattr_prepare(struct dentry dentry, struct iattr ia)
	366	{
	367	return (inode_change_ok(dentry->d_inode, ia));
	368	}
	369	#endif
	370
7268e1be	371	#endif /* _ZFS_VFS_H */