[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ocfs2 / acl.c

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * acl.c
 *
 * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
 *
 * CREDITS:
 * Lots of code in this file is copy from linux/fs/ext3/acl.c.
 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License version 2 as published by the Free Software Foundation.
 *
 * This program 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.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/string.h>

#define MLOG_MASK_PREFIX ML_INODE
#include <cluster/masklog.h>

#include "ocfs2.h"
#include "alloc.h"
#include "dlmglue.h"
#include "file.h"
#include "ocfs2_fs.h"

#include "xattr.h"
#include "acl.h"

/*
 * Convert from xattr value to acl struct.
 */
static struct posix_acl *ocfs2_acl_from_xattr(const void *value, size_t size)
{
	int n, count;
	struct posix_acl *acl;

	if (!value)
		return NULL;
	if (size < sizeof(struct posix_acl_entry))
		return ERR_PTR(-EINVAL);

	count = size / sizeof(struct posix_acl_entry);
	if (count < 0)
		return ERR_PTR(-EINVAL);
	if (count == 0)
		return NULL;

	acl = posix_acl_alloc(count, GFP_NOFS);
	if (!acl)
		return ERR_PTR(-ENOMEM);
	for (n = 0; n < count; n++) {
		struct ocfs2_acl_entry *entry =
			(struct ocfs2_acl_entry *)value;

		acl->a_entries[n].e_tag  = le16_to_cpu(entry->e_tag);
		acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
		acl->a_entries[n].e_id   = le32_to_cpu(entry->e_id);
		value += sizeof(struct posix_acl_entry);

	}
	return acl;
}

/*
 * Convert acl struct to xattr value.
 */
static void *ocfs2_acl_to_xattr(const struct posix_acl *acl, size_t *size)
{
	struct ocfs2_acl_entry *entry = NULL;
	char *ocfs2_acl;
	size_t n;

	*size = acl->a_count * sizeof(struct posix_acl_entry);

	ocfs2_acl = kmalloc(*size, GFP_NOFS);
	if (!ocfs2_acl)
		return ERR_PTR(-ENOMEM);

	entry = (struct ocfs2_acl_entry *)ocfs2_acl;
	for (n = 0; n < acl->a_count; n++, entry++) {
		entry->e_tag  = cpu_to_le16(acl->a_entries[n].e_tag);
		entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
		entry->e_id   = cpu_to_le32(acl->a_entries[n].e_id);
	}
	return ocfs2_acl;
}

static struct posix_acl *ocfs2_get_acl_nolock(struct inode *inode,
					      int type,
					      struct buffer_head *di_bh)
{
	int name_index;
	char *value = NULL;
	struct posix_acl *acl;
	int retval;

	switch (type) {
	case ACL_TYPE_ACCESS:
		name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
		break;
	case ACL_TYPE_DEFAULT:
		name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
		break;
	default:
		return ERR_PTR(-EINVAL);
	}

	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index, "", NULL, 0);
	if (retval > 0) {
		value = kmalloc(retval, GFP_NOFS);
		if (!value)
			return ERR_PTR(-ENOMEM);
		retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
						"", value, retval);
	}

	if (retval > 0)
		acl = ocfs2_acl_from_xattr(value, retval);
	else if (retval == -ENODATA || retval == 0)
		acl = NULL;
	else
		acl = ERR_PTR(retval);

	kfree(value);

	return acl;
}


/*
 * Get posix acl.
 */
static struct posix_acl *ocfs2_get_acl(struct inode *inode, int type)
{
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct buffer_head *di_bh = NULL;
	struct posix_acl *acl;
	int ret;

	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return NULL;

	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	if (ret < 0) {
		mlog_errno(ret);
		acl = ERR_PTR(ret);
		return acl;
	}

	acl = ocfs2_get_acl_nolock(inode, type, di_bh);

	ocfs2_inode_unlock(inode, 0);

	brelse(di_bh);

	return acl;
}

/*
 * Set the access or default ACL of an inode.
 */
static int ocfs2_set_acl(handle_t *handle,
			 struct inode *inode,
			 struct buffer_head *di_bh,
			 int type,
			 struct posix_acl *acl,
			 struct ocfs2_alloc_context *meta_ac,
			 struct ocfs2_alloc_context *data_ac)
{
	int name_index;
	void *value = NULL;
	size_t size = 0;
	int ret;

	if (S_ISLNK(inode->i_mode))
		return -EOPNOTSUPP;

	switch (type) {
	case ACL_TYPE_ACCESS:
		name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
		if (acl) {
			mode_t mode = inode->i_mode;
			ret = posix_acl_equiv_mode(acl, &mode);
			if (ret < 0)
				return ret;
			else {
				inode->i_mode = mode;
				if (ret == 0)
					acl = NULL;
			}
		}
		break;
	case ACL_TYPE_DEFAULT:
		name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
		if (!S_ISDIR(inode->i_mode))
			return acl ? -EACCES : 0;
		break;
	default:
		return -EINVAL;
	}

	if (acl) {
		value = ocfs2_acl_to_xattr(acl, &size);
		if (IS_ERR(value))
			return (int)PTR_ERR(value);
	}

	if (handle)
		ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
					     "", value, size, 0,
					     meta_ac, data_ac);
	else
		ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);

	kfree(value);

	return ret;
}

int ocfs2_check_acl(struct inode *inode, int mask)
{
	struct posix_acl *acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))
		return PTR_ERR(acl);
	if (acl) {
		int ret = posix_acl_permission(inode, acl, mask);
		posix_acl_release(acl);
		return ret;
	}

	return -EAGAIN;
}

int ocfs2_acl_chmod(struct inode *inode)
{
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct posix_acl *acl, *clone;
	int ret;

	if (S_ISLNK(inode->i_mode))
		return -EOPNOTSUPP;

	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return 0;

	acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
	if (IS_ERR(acl) || !acl)
		return PTR_ERR(acl);
	clone = posix_acl_clone(acl, GFP_KERNEL);
	posix_acl_release(acl);
	if (!clone)
		return -ENOMEM;
	ret = posix_acl_chmod_masq(clone, inode->i_mode);
	if (!ret)
		ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
				    clone, NULL, NULL);
	posix_acl_release(clone);
	return ret;
}

/*
 * Initialize the ACLs of a new inode. If parent directory has default ACL,
 * then clone to new inode. Called from ocfs2_mknod.
 */
int ocfs2_init_acl(handle_t *handle,
		   struct inode *inode,
		   struct inode *dir,
		   struct buffer_head *di_bh,
		   struct buffer_head *dir_bh,
		   struct ocfs2_alloc_context *meta_ac,
		   struct ocfs2_alloc_context *data_ac)
{
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct posix_acl *acl = NULL;
	int ret = 0;

	if (!S_ISLNK(inode->i_mode)) {
		if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
			acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
						   dir_bh);
			if (IS_ERR(acl))
				return PTR_ERR(acl);
		}
		if (!acl)
			inode->i_mode &= ~current_umask();
	}
	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
		struct posix_acl *clone;
		mode_t mode;

		if (S_ISDIR(inode->i_mode)) {
			ret = ocfs2_set_acl(handle, inode, di_bh,
					    ACL_TYPE_DEFAULT, acl,
					    meta_ac, data_ac);
			if (ret)
				goto cleanup;
		}
		clone = posix_acl_clone(acl, GFP_NOFS);
		ret = -ENOMEM;
		if (!clone)
			goto cleanup;

		mode = inode->i_mode;
		ret = posix_acl_create_masq(clone, &mode);
		if (ret >= 0) {
			inode->i_mode = mode;
			if (ret > 0) {
				ret = ocfs2_set_acl(handle, inode,
						    di_bh, ACL_TYPE_ACCESS,
						    clone, meta_ac, data_ac);
			}
		}
		posix_acl_release(clone);
	}
cleanup:
	posix_acl_release(acl);
	return ret;
}

static size_t ocfs2_xattr_list_acl_access(struct dentry *dentry,
					  char *list,
					  size_t list_len,
					  const char *name,
					  size_t name_len,
					  int type)
{
	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
	const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);

	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return 0;

	if (list && size <= list_len)
		memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
	return size;
}

static size_t ocfs2_xattr_list_acl_default(struct dentry *dentry,
					   char *list,
					   size_t list_len,
					   const char *name,
					   size_t name_len,
					   int type)
{
	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
	const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);

	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return 0;

	if (list && size <= list_len)
		memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
	return size;
}

static int ocfs2_xattr_get_acl(struct dentry *dentry, const char *name,
		void *buffer, size_t size, int type)
{
	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
	struct posix_acl *acl;
	int ret;

	if (strcmp(name, "") != 0)
		return -EINVAL;
	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return -EOPNOTSUPP;

	acl = ocfs2_get_acl(dentry->d_inode, type);
	if (IS_ERR(acl))
		return PTR_ERR(acl);
	if (acl == NULL)
		return -ENODATA;
	ret = posix_acl_to_xattr(acl, buffer, size);
	posix_acl_release(acl);

	return ret;
}

static int ocfs2_xattr_set_acl(struct dentry *dentry, const char *name,
		const void *value, size_t size, int flags, int type)
{
	struct inode *inode = dentry->d_inode;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct posix_acl *acl;
	int ret = 0;

	if (strcmp(name, "") != 0)
		return -EINVAL;
	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return -EOPNOTSUPP;

	if (!is_owner_or_cap(inode))
		return -EPERM;

	if (value) {
		acl = posix_acl_from_xattr(value, size);
		if (IS_ERR(acl))
			return PTR_ERR(acl);
		else if (acl) {
			ret = posix_acl_valid(acl);
			if (ret)
				goto cleanup;
		}
	} else
		acl = NULL;

	ret = ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);

cleanup:
	posix_acl_release(acl);
	return ret;
}

struct xattr_handler ocfs2_xattr_acl_access_handler = {
	.prefix	= POSIX_ACL_XATTR_ACCESS,
	.flags	= ACL_TYPE_ACCESS,
	.list	= ocfs2_xattr_list_acl_access,
	.get	= ocfs2_xattr_get_acl,
	.set	= ocfs2_xattr_set_acl,
};

struct xattr_handler ocfs2_xattr_acl_default_handler = {
	.prefix	= POSIX_ACL_XATTR_DEFAULT,
	.flags	= ACL_TYPE_DEFAULT,
	.list	= ocfs2_xattr_list_acl_default,
	.get	= ocfs2_xattr_get_acl,
	.set	= ocfs2_xattr_set_acl,
};
Commit	Line	Data
929fb014 TY	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* acl.c
	5	*
	6	* Copyright (C) 2004, 2008 Oracle. All rights reserved.
	7	*
	8	* CREDITS:
	9	* Lots of code in this file is copy from linux/fs/ext3/acl.c.
	10	* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public
	14	* License version 2 as published by the Free Software Foundation.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	19	* General Public License for more details.
	20	*/
	21
	22	#include <linux/init.h>
	23	#include <linux/module.h>
	24	#include <linux/string.h>
	25
	26	#define MLOG_MASK_PREFIX ML_INODE
	27	#include <cluster/masklog.h>
	28
	29	#include "ocfs2.h"
	30	#include "alloc.h"
	31	#include "dlmglue.h"
	32	#include "file.h"
	33	#include "ocfs2_fs.h"
	34
	35	#include "xattr.h"
	36	#include "acl.h"
	37
	38	/*
	39	* Convert from xattr value to acl struct.
	40	*/
	41	static struct posix_acl ocfs2_acl_from_xattr(const void value, size_t size)
	42	{
	43	int n, count;
	44	struct posix_acl *acl;
	45
	46	if (!value)
	47	return NULL;
	48	if (size < sizeof(struct posix_acl_entry))
	49	return ERR_PTR(-EINVAL);
	50
	51	count = size / sizeof(struct posix_acl_entry);
	52	if (count < 0)
	53	return ERR_PTR(-EINVAL);
	54	if (count == 0)
	55	return NULL;
	56
	57	acl = posix_acl_alloc(count, GFP_NOFS);
	58	if (!acl)
	59	return ERR_PTR(-ENOMEM);
	60	for (n = 0; n < count; n++) {
	61	struct ocfs2_acl_entry *entry =
	62	(struct ocfs2_acl_entry *)value;
	63
	64	acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
65	acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
66	acl->a_entries[n].e_id = le32_to_cpu(entry->e_id);
67	value += sizeof(struct posix_acl_entry);
68
69	}
70	return acl;
71	}
72
73	/*
74	* Convert acl struct to xattr value.
75	*/
76	static void ocfs2_acl_to_xattr(const struct posix_acl acl, size_t *size)
77	{
78	struct ocfs2_acl_entry *entry = NULL;
79	char *ocfs2_acl;
80	size_t n;
81
82	size = acl->a_count sizeof(struct posix_acl_entry);
83
84	ocfs2_acl = kmalloc(*size, GFP_NOFS);
85	if (!ocfs2_acl)
86	return ERR_PTR(-ENOMEM);
87
88	entry = (struct ocfs2_acl_entry *)ocfs2_acl;
89	for (n = 0; n < acl->a_count; n++, entry++) {
90	entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
91	entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
92	entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
93	}
94	return ocfs2_acl;
95	}
96
97	static struct posix_acl ocfs2_get_acl_nolock(struct inode inode,
98	int type,
99	struct buffer_head *di_bh)
100	{
929fb014 TY	101	int name_index;
	102	char *value = NULL;
	103	struct posix_acl *acl;
	104	int retval;
	105
929fb014 TY	106	switch (type) {
	107	case ACL_TYPE_ACCESS:
	108	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	109	break;
	110	case ACL_TYPE_DEFAULT:
	111	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	112	break;
	113	default:
	114	return ERR_PTR(-EINVAL);
	115	}
	116
	117	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index, "", NULL, 0);
	118	if (retval > 0) {
	119	value = kmalloc(retval, GFP_NOFS);
	120	if (!value)
	121	return ERR_PTR(-ENOMEM);
	122	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
	123	"", value, retval);
	124	}
	125
	126	if (retval > 0)
	127	acl = ocfs2_acl_from_xattr(value, retval);
	128	else if (retval == -ENODATA \|\| retval == 0)
	129	acl = NULL;
	130	else
	131	acl = ERR_PTR(retval);
	132
	133	kfree(value);
	134
	135	return acl;
	136	}
	137
	138
	139	/*
	140	* Get posix acl.
	141	*/
	142	static struct posix_acl ocfs2_get_acl(struct inode inode, int type)
	143	{
	144	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	145	struct buffer_head *di_bh = NULL;
	146	struct posix_acl *acl;
	147	int ret;
	148
	149	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	150	return NULL;
	151
	152	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	153	if (ret < 0) {
	154	mlog_errno(ret);
	155	acl = ERR_PTR(ret);
	156	return acl;
	157	}
	158
	159	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
	160
	161	ocfs2_inode_unlock(inode, 0);
	162
	163	brelse(di_bh);
	164
	165	return acl;
	166	}
	167
	168	/*
	169	* Set the access or default ACL of an inode.
170	*/
171	static int ocfs2_set_acl(handle_t *handle,
172	struct inode *inode,
173	struct buffer_head *di_bh,
174	int type,
175	struct posix_acl *acl,
176	struct ocfs2_alloc_context *meta_ac,
177	struct ocfs2_alloc_context *data_ac)
178	{
179	int name_index;
180	void *value = NULL;
181	size_t size = 0;
182	int ret;
183
184	if (S_ISLNK(inode->i_mode))
185	return -EOPNOTSUPP;
186
187	switch (type) {
188	case ACL_TYPE_ACCESS:
189	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
190	if (acl) {
191	mode_t mode = inode->i_mode;
192	ret = posix_acl_equiv_mode(acl, &mode);
193	if (ret < 0)
194	return ret;
195	else {
196	inode->i_mode = mode;
197	if (ret == 0)
198	acl = NULL;
199	}
200	}
201	break;
202	case ACL_TYPE_DEFAULT:
203	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
204	if (!S_ISDIR(inode->i_mode))
205	return acl ? -EACCES : 0;
206	break;
207	default:
208	return -EINVAL;
209	}
210
211	if (acl) {
212	value = ocfs2_acl_to_xattr(acl, &size);
213	if (IS_ERR(value))
214	return (int)PTR_ERR(value);
215	}
216
217	if (handle)
218	ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
219	"", value, size, 0,
220	meta_ac, data_ac);
221	else
222	ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);
223
224	kfree(value);
225
226	return ret;
227	}
228
23fc2702 TY	229	int ocfs2_check_acl(struct inode *inode, int mask)
	230	{
	231	struct posix_acl *acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
	232
	233	if (IS_ERR(acl))
	234	return PTR_ERR(acl);
	235	if (acl) {
	236	int ret = posix_acl_permission(inode, acl, mask);
	237	posix_acl_release(acl);
	238	return ret;
	239	}
	240
	241	return -EAGAIN;
	242	}
	243
060bc66d TY	244	int ocfs2_acl_chmod(struct inode *inode)
	245	{
	246	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	247	struct posix_acl acl, clone;
	248	int ret;
	249
	250	if (S_ISLNK(inode->i_mode))
	251	return -EOPNOTSUPP;
	252
	253	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	254	return 0;
	255
	256	acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
	257	if (IS_ERR(acl) \|\| !acl)
	258	return PTR_ERR(acl);
	259	clone = posix_acl_clone(acl, GFP_KERNEL);
	260	posix_acl_release(acl);
	261	if (!clone)
	262	return -ENOMEM;
	263	ret = posix_acl_chmod_masq(clone, inode->i_mode);
	264	if (!ret)
	265	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
	266	clone, NULL, NULL);
	267	posix_acl_release(clone);
	268	return ret;
	269	}
	270
89c38bd0 TY	271	/*
	272	* Initialize the ACLs of a new inode. If parent directory has default ACL,
	273	* then clone to new inode. Called from ocfs2_mknod.
	274	*/
	275	int ocfs2_init_acl(handle_t *handle,
	276	struct inode *inode,
	277	struct inode *dir,
	278	struct buffer_head *di_bh,
	279	struct buffer_head *dir_bh,
	280	struct ocfs2_alloc_context *meta_ac,
	281	struct ocfs2_alloc_context *data_ac)
	282	{
	283	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	284	struct posix_acl *acl = NULL;
	285	int ret = 0;
	286
	287	if (!S_ISLNK(inode->i_mode)) {
	288	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
	289	acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
	290	dir_bh);
	291	if (IS_ERR(acl))
	292	return PTR_ERR(acl);
	293	}
	294	if (!acl)
ce3b0f8d	295	inode->i_mode &= ~current_umask();
89c38bd0 TY	296	}
	297	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
	298	struct posix_acl *clone;
	299	mode_t mode;
	300
	301	if (S_ISDIR(inode->i_mode)) {
	302	ret = ocfs2_set_acl(handle, inode, di_bh,
	303	ACL_TYPE_DEFAULT, acl,
	304	meta_ac, data_ac);
	305	if (ret)
	306	goto cleanup;
	307	}
	308	clone = posix_acl_clone(acl, GFP_NOFS);
	309	ret = -ENOMEM;
	310	if (!clone)
	311	goto cleanup;
	312
	313	mode = inode->i_mode;
	314	ret = posix_acl_create_masq(clone, &mode);
	315	if (ret >= 0) {
	316	inode->i_mode = mode;
	317	if (ret > 0) {
	318	ret = ocfs2_set_acl(handle, inode,
	319	di_bh, ACL_TYPE_ACCESS,
	320	clone, meta_ac, data_ac);
	321	}
	322	}
	323	posix_acl_release(clone);
	324	}
	325	cleanup:
	326	posix_acl_release(acl);
	327	return ret;
	328	}
	329
431547b3	330	static size_t ocfs2_xattr_list_acl_access(struct dentry *dentry,
929fb014 TY	331	char *list,
	332	size_t list_len,
	333	const char *name,
431547b3 CH	334	size_t name_len,
431547b3 CH	335	int type)
929fb014	336	{
431547b3	337	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	338	const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
	339
	340	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	341	return 0;
	342
	343	if (list && size <= list_len)
	344	memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
	345	return size;
	346	}
	347
431547b3	348	static size_t ocfs2_xattr_list_acl_default(struct dentry *dentry,
929fb014 TY	349	char *list,
	350	size_t list_len,
	351	const char *name,
431547b3 CH	352	size_t name_len,
431547b3 CH	353	int type)
929fb014	354	{
431547b3	355	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	356	const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
	357
	358	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	359	return 0;
	360
	361	if (list && size <= list_len)
	362	memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
	363	return size;
	364	}
	365
431547b3 CH	366	static int ocfs2_xattr_get_acl(struct dentry dentry, const char name,
431547b3 CH	367	void *buffer, size_t size, int type)
929fb014	368	{
431547b3	369	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	370	struct posix_acl *acl;
	371	int ret;
	372
431547b3 CH	373	if (strcmp(name, "") != 0)
431547b3 CH	374	return -EINVAL;
929fb014 TY	375	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	376	return -EOPNOTSUPP;
	377
431547b3	378	acl = ocfs2_get_acl(dentry->d_inode, type);
929fb014 TY	379	if (IS_ERR(acl))
	380	return PTR_ERR(acl);
	381	if (acl == NULL)
	382	return -ENODATA;
	383	ret = posix_acl_to_xattr(acl, buffer, size);
	384	posix_acl_release(acl);
	385
	386	return ret;
	387	}
	388
431547b3 CH	389	static int ocfs2_xattr_set_acl(struct dentry dentry, const char name,
431547b3 CH	390	const void *value, size_t size, int flags, int type)
929fb014	391	{
431547b3	392	struct inode *inode = dentry->d_inode;
929fb014 TY	393	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	394	struct posix_acl *acl;
	395	int ret = 0;
	396
431547b3 CH	397	if (strcmp(name, "") != 0)
431547b3 CH	398	return -EINVAL;
929fb014 TY	399	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	400	return -EOPNOTSUPP;
	401
	402	if (!is_owner_or_cap(inode))
	403	return -EPERM;
	404
	405	if (value) {
	406	acl = posix_acl_from_xattr(value, size);
	407	if (IS_ERR(acl))
	408	return PTR_ERR(acl);
	409	else if (acl) {
	410	ret = posix_acl_valid(acl);
	411	if (ret)
	412	goto cleanup;
	413	}
	414	} else
	415	acl = NULL;
	416
	417	ret = ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);
	418
	419	cleanup:
	420	posix_acl_release(acl);
	421	return ret;
	422	}
	423
929fb014 TY	424	struct xattr_handler ocfs2_xattr_acl_access_handler = {
929fb014 TY	425	.prefix = POSIX_ACL_XATTR_ACCESS,
431547b3	426	.flags = ACL_TYPE_ACCESS,
929fb014	427	.list = ocfs2_xattr_list_acl_access,
431547b3 CH	428	.get = ocfs2_xattr_get_acl,
431547b3 CH	429	.set = ocfs2_xattr_set_acl,
929fb014 TY	430	};
	431
	432	struct xattr_handler ocfs2_xattr_acl_default_handler = {
	433	.prefix = POSIX_ACL_XATTR_DEFAULT,
431547b3	434	.flags = ACL_TYPE_DEFAULT,
929fb014	435	.list = ocfs2_xattr_list_acl_default,
431547b3 CH	436	.get = ocfs2_xattr_get_acl,
431547b3 CH	437	.set = ocfs2_xattr_set_acl,
929fb014	438	};