[linux-2.6-block.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/slab.h>
#include <linux/string.h>

#include <cluster/masklog.h>

#include "ocfs2.h"
#include "alloc.h"
#include "dlmglue.h"
#include "file.h"
#include "inode.h"
#include "journal.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);

	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);
		switch(acl->a_entries[n].e_tag) {
		case ACL_USER:
			acl->a_entries[n].e_uid =
				make_kuid(&init_user_ns,
					  le32_to_cpu(entry->e_id));
			break;
		case ACL_GROUP:
			acl->a_entries[n].e_gid =
				make_kgid(&init_user_ns,
					  le32_to_cpu(entry->e_id));
			break;
		default:
			break;
		}
		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);
		switch(acl->a_entries[n].e_tag) {
		case ACL_USER:
			entry->e_id = cpu_to_le32(
				from_kuid(&init_user_ns,
					  acl->a_entries[n].e_uid));
			break;
		case ACL_GROUP:
			entry->e_id = cpu_to_le32(
				from_kgid(&init_user_ns,
					  acl->a_entries[n].e_gid));
			break;
		default:
			entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
			break;
		}
	}
	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;
}

/*
 * Helper function to set i_mode in memory and disk. Some call paths
 * will not have di_bh or a journal handle to pass, in which case it
 * will create it's own.
 */
static int ocfs2_acl_set_mode(struct inode *inode, struct buffer_head *di_bh,
			      handle_t *handle, umode_t new_mode)
{
	int ret, commit_handle = 0;
	struct ocfs2_dinode *di;

	if (di_bh == NULL) {
		ret = ocfs2_read_inode_block(inode, &di_bh);
		if (ret) {
			mlog_errno(ret);
			goto out;
		}
	} else
		get_bh(di_bh);

	if (handle == NULL) {
		handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb),
					   OCFS2_INODE_UPDATE_CREDITS);
		if (IS_ERR(handle)) {
			ret = PTR_ERR(handle);
			mlog_errno(ret);
			goto out_brelse;
		}

		commit_handle = 1;
	}

	di = (struct ocfs2_dinode *)di_bh->b_data;
	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
				      OCFS2_JOURNAL_ACCESS_WRITE);
	if (ret) {
		mlog_errno(ret);
		goto out_commit;
	}

	inode->i_mode = new_mode;
	inode->i_ctime = CURRENT_TIME;
	di->i_mode = cpu_to_le16(inode->i_mode);
	di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
	di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);

	ocfs2_journal_dirty(handle, di_bh);

out_commit:
	if (commit_handle)
		ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
out_brelse:
	brelse(di_bh);
out:
	return ret;
}

/*
 * 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) {
			umode_t mode = inode->i_mode;
			ret = posix_acl_equiv_mode(acl, &mode);
			if (ret < 0)
				return ret;
			else {
				if (ret == 0)
					acl = NULL;

				ret = ocfs2_acl_set_mode(inode, di_bh,
							 handle, mode);
				if (ret)
					return ret;

			}
		}
		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;
}

struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type)
{
	struct ocfs2_super *osb;
	struct buffer_head *di_bh = NULL;
	struct posix_acl *acl;
	int ret = -EAGAIN;

	osb = OCFS2_SB(inode->i_sb);
	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return NULL;

	ret = ocfs2_read_inode_block(inode, &di_bh);
	if (ret < 0)
		return ERR_PTR(ret);

	acl = ocfs2_get_acl_nolock(inode, type, di_bh);

	brelse(di_bh);

	return acl;
}

int ocfs2_acl_chmod(struct inode *inode)
{
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct posix_acl *acl;
	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);
	ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
	if (ret)
		return ret;
	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
			    acl, NULL, NULL);
	posix_acl_release(acl);
	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, ret2;
	umode_t mode;

	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) {
			mode = inode->i_mode & ~current_umask();
			ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
			if (ret) {
				mlog_errno(ret);
				goto cleanup;
			}
		}
	}
	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
		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;
		}
		mode = inode->i_mode;
		ret = posix_acl_create(&acl, GFP_NOFS, &mode);
		if (ret < 0)
			return ret;

		ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
		if (ret2) {
			mlog_errno(ret2);
			ret = ret2;
			goto cleanup;
		}
		if (ret > 0) {
			ret = ocfs2_set_acl(handle, inode,
					    di_bh, ACL_TYPE_ACCESS,
					    acl, meta_ac, data_ac);
		}
	}
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(&init_user_ns, 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 (!inode_owner_or_capable(inode))
		return -EPERM;

	if (value) {
		acl = posix_acl_from_xattr(&init_user_ns, 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;
}

const 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,
};

const 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>
5a0e3ad6	24	#include <linux/slab.h>
929fb014 TY	25	#include <linux/string.h>
929fb014 TY	26
929fb014 TY	27	#include <cluster/masklog.h>
	28
	29	#include "ocfs2.h"
	30	#include "alloc.h"
	31	#include "dlmglue.h"
	32	#include "file.h"
fcefd25a MF	33	#include "inode.h"
fcefd25a MF	34	#include "journal.h"
929fb014 TY	35	#include "ocfs2_fs.h"
	36
	37	#include "xattr.h"
	38	#include "acl.h"
	39
	40	/*
	41	* Convert from xattr value to acl struct.
	42	*/
	43	static struct posix_acl ocfs2_acl_from_xattr(const void value, size_t size)
	44	{
	45	int n, count;
	46	struct posix_acl *acl;
	47
	48	if (!value)
	49	return NULL;
	50	if (size < sizeof(struct posix_acl_entry))
	51	return ERR_PTR(-EINVAL);
	52
	53	count = size / sizeof(struct posix_acl_entry);
929fb014 TY	54
	55	acl = posix_acl_alloc(count, GFP_NOFS);
	56	if (!acl)
	57	return ERR_PTR(-ENOMEM);
	58	for (n = 0; n < count; n++) {
	59	struct ocfs2_acl_entry *entry =
	60	(struct ocfs2_acl_entry *)value;
	61
	62	acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
	63	acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
9522751c EB	64	switch(acl->a_entries[n].e_tag) {
	65	case ACL_USER:
	66	acl->a_entries[n].e_uid =
	67	make_kuid(&init_user_ns,
	68	le32_to_cpu(entry->e_id));
	69	break;
	70	case ACL_GROUP:
	71	acl->a_entries[n].e_gid =
	72	make_kgid(&init_user_ns,
	73	le32_to_cpu(entry->e_id));
	74	break;
	75	default:
	76	break;
	77	}
929fb014 TY	78	value += sizeof(struct posix_acl_entry);
	79
	80	}
	81	return acl;
	82	}
	83
	84	/*
	85	* Convert acl struct to xattr value.
	86	*/
	87	static void ocfs2_acl_to_xattr(const struct posix_acl acl, size_t *size)
	88	{
	89	struct ocfs2_acl_entry *entry = NULL;
	90	char *ocfs2_acl;
	91	size_t n;
	92
	93	size = acl->a_count sizeof(struct posix_acl_entry);
	94
	95	ocfs2_acl = kmalloc(*size, GFP_NOFS);
	96	if (!ocfs2_acl)
	97	return ERR_PTR(-ENOMEM);
	98
	99	entry = (struct ocfs2_acl_entry *)ocfs2_acl;
	100	for (n = 0; n < acl->a_count; n++, entry++) {
	101	entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
	102	entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
9522751c EB	103	switch(acl->a_entries[n].e_tag) {
	104	case ACL_USER:
	105	entry->e_id = cpu_to_le32(
	106	from_kuid(&init_user_ns,
	107	acl->a_entries[n].e_uid));
	108	break;
	109	case ACL_GROUP:
	110	entry->e_id = cpu_to_le32(
	111	from_kgid(&init_user_ns,
	112	acl->a_entries[n].e_gid));
	113	break;
	114	default:
	115	entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
	116	break;
	117	}
929fb014 TY	118	}
	119	return ocfs2_acl;
	120	}
	121
	122	static struct posix_acl ocfs2_get_acl_nolock(struct inode inode,
	123	int type,
	124	struct buffer_head *di_bh)
	125	{
929fb014 TY	126	int name_index;
	127	char *value = NULL;
	128	struct posix_acl *acl;
	129	int retval;
	130
929fb014 TY	131	switch (type) {
	132	case ACL_TYPE_ACCESS:
	133	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	134	break;
	135	case ACL_TYPE_DEFAULT:
	136	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	137	break;
	138	default:
	139	return ERR_PTR(-EINVAL);
	140	}
	141
	142	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index, "", NULL, 0);
	143	if (retval > 0) {
	144	value = kmalloc(retval, GFP_NOFS);
	145	if (!value)
	146	return ERR_PTR(-ENOMEM);
	147	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
	148	"", value, retval);
	149	}
	150
	151	if (retval > 0)
	152	acl = ocfs2_acl_from_xattr(value, retval);
	153	else if (retval == -ENODATA \|\| retval == 0)
	154	acl = NULL;
	155	else
	156	acl = ERR_PTR(retval);
	157
	158	kfree(value);
	159
	160	return acl;
	161	}
	162
	163
	164	/*
	165	* Get posix acl.
	166	*/
	167	static struct posix_acl ocfs2_get_acl(struct inode inode, int type)
	168	{
	169	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	170	struct buffer_head *di_bh = NULL;
	171	struct posix_acl *acl;
	172	int ret;
	173
	174	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	175	return NULL;
	176
	177	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	178	if (ret < 0) {
	179	mlog_errno(ret);
	180	acl = ERR_PTR(ret);
	181	return acl;
	182	}
	183
	184	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
	185
	186	ocfs2_inode_unlock(inode, 0);
	187
	188	brelse(di_bh);
	189
	190	return acl;
	191	}
	192
fcefd25a MF	193	/*
	194	* Helper function to set i_mode in memory and disk. Some call paths
	195	* will not have di_bh or a journal handle to pass, in which case it
	196	* will create it's own.
	197	*/
	198	static int ocfs2_acl_set_mode(struct inode inode, struct buffer_head di_bh,
	199	handle_t *handle, umode_t new_mode)
	200	{
	201	int ret, commit_handle = 0;
	202	struct ocfs2_dinode *di;
	203
	204	if (di_bh == NULL) {
	205	ret = ocfs2_read_inode_block(inode, &di_bh);
	206	if (ret) {
	207	mlog_errno(ret);
	208	goto out;
	209	}
	210	} else
	211	get_bh(di_bh);
	212
	213	if (handle == NULL) {
	214	handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb),
	215	OCFS2_INODE_UPDATE_CREDITS);
	216	if (IS_ERR(handle)) {
	217	ret = PTR_ERR(handle);
	218	mlog_errno(ret);
	219	goto out_brelse;
	220	}
	221
	222	commit_handle = 1;
	223	}
	224
	225	di = (struct ocfs2_dinode *)di_bh->b_data;
	226	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
	227	OCFS2_JOURNAL_ACCESS_WRITE);
	228	if (ret) {
	229	mlog_errno(ret);
	230	goto out_commit;
	231	}
	232
	233	inode->i_mode = new_mode;
12828061	234	inode->i_ctime = CURRENT_TIME;
fcefd25a	235	di->i_mode = cpu_to_le16(inode->i_mode);
12828061 TM	236	di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
12828061 TM	237	di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
fcefd25a MF	238
	239	ocfs2_journal_dirty(handle, di_bh);
	240
	241	out_commit:
	242	if (commit_handle)
	243	ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
	244	out_brelse:
	245	brelse(di_bh);
	246	out:
	247	return ret;
	248	}
	249
929fb014 TY	250	/*
	251	* Set the access or default ACL of an inode.
	252	*/
	253	static int ocfs2_set_acl(handle_t *handle,
	254	struct inode *inode,
	255	struct buffer_head *di_bh,
	256	int type,
	257	struct posix_acl *acl,
	258	struct ocfs2_alloc_context *meta_ac,
	259	struct ocfs2_alloc_context *data_ac)
	260	{
	261	int name_index;
	262	void *value = NULL;
	263	size_t size = 0;
	264	int ret;
	265
	266	if (S_ISLNK(inode->i_mode))
	267	return -EOPNOTSUPP;
	268
	269	switch (type) {
	270	case ACL_TYPE_ACCESS:
	271	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	272	if (acl) {
d6952123	273	umode_t mode = inode->i_mode;
929fb014 TY	274	ret = posix_acl_equiv_mode(acl, &mode);
	275	if (ret < 0)
	276	return ret;
	277	else {
929fb014 TY	278	if (ret == 0)
929fb014 TY	279	acl = NULL;
fcefd25a MF	280
	281	ret = ocfs2_acl_set_mode(inode, di_bh,
	282	handle, mode);
	283	if (ret)
	284	return ret;
	285
929fb014 TY	286	}
	287	}
	288	break;
	289	case ACL_TYPE_DEFAULT:
	290	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	291	if (!S_ISDIR(inode->i_mode))
	292	return acl ? -EACCES : 0;
	293	break;
	294	default:
	295	return -EINVAL;
	296	}
	297
	298	if (acl) {
	299	value = ocfs2_acl_to_xattr(acl, &size);
	300	if (IS_ERR(value))
	301	return (int)PTR_ERR(value);
	302	}
	303
	304	if (handle)
	305	ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
	306	"", value, size, 0,
	307	meta_ac, data_ac);
	308	else
	309	ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);
	310
	311	kfree(value);
	312
	313	return ret;
	314	}
	315
4e34e719	316	struct posix_acl ocfs2_iop_get_acl(struct inode inode, int type)
23fc2702	317	{
b74c79e9	318	struct ocfs2_super *osb;
845b6cf3 JZ	319	struct buffer_head *di_bh = NULL;
	320	struct posix_acl *acl;
	321	int ret = -EAGAIN;
	322
b74c79e9	323	osb = OCFS2_SB(inode->i_sb);
845b6cf3	324	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
4e34e719	325	return NULL;
23fc2702	326
845b6cf3	327	ret = ocfs2_read_inode_block(inode, &di_bh);
4e34e719 CH	328	if (ret < 0)
4e34e719 CH	329	return ERR_PTR(ret);
845b6cf3	330
4e34e719	331	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
845b6cf3 JZ	332
	333	brelse(di_bh);
	334
4e34e719	335	return acl;
23fc2702 TY	336	}
23fc2702 TY	337
060bc66d TY	338	int ocfs2_acl_chmod(struct inode *inode)
	339	{
	340	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
bc26ab5f	341	struct posix_acl *acl;
060bc66d TY	342	int ret;
	343
	344	if (S_ISLNK(inode->i_mode))
	345	return -EOPNOTSUPP;
	346
	347	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	348	return 0;
	349
	350	acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
	351	if (IS_ERR(acl) \|\| !acl)
	352	return PTR_ERR(acl);
bc26ab5f AV	353	ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
	354	if (ret)
	355	return ret;
	356	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
	357	acl, NULL, NULL);
060bc66d	358	posix_acl_release(acl);
060bc66d TY	359	return ret;
	360	}
	361
89c38bd0 TY	362	/*
	363	* Initialize the ACLs of a new inode. If parent directory has default ACL,
	364	* then clone to new inode. Called from ocfs2_mknod.
	365	*/
	366	int ocfs2_init_acl(handle_t *handle,
	367	struct inode *inode,
	368	struct inode *dir,
	369	struct buffer_head *di_bh,
	370	struct buffer_head *dir_bh,
	371	struct ocfs2_alloc_context *meta_ac,
	372	struct ocfs2_alloc_context *data_ac)
	373	{
	374	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	375	struct posix_acl *acl = NULL;
6eda3dd3	376	int ret = 0, ret2;
d3fb6120	377	umode_t mode;
89c38bd0 TY	378
	379	if (!S_ISLNK(inode->i_mode)) {
	380	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
	381	acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
	382	dir_bh);
	383	if (IS_ERR(acl))
	384	return PTR_ERR(acl);
	385	}
fcefd25a MF	386	if (!acl) {
	387	mode = inode->i_mode & ~current_umask();
	388	ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	389	if (ret) {
	390	mlog_errno(ret);
	391	goto cleanup;
	392	}
	393	}
89c38bd0 TY	394	}
89c38bd0 TY	395	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
89c38bd0 TY	396	if (S_ISDIR(inode->i_mode)) {
	397	ret = ocfs2_set_acl(handle, inode, di_bh,
	398	ACL_TYPE_DEFAULT, acl,
	399	meta_ac, data_ac);
	400	if (ret)
	401	goto cleanup;
	402	}
89c38bd0	403	mode = inode->i_mode;
826cae2f AV	404	ret = posix_acl_create(&acl, GFP_NOFS, &mode);
	405	if (ret < 0)
	406	return ret;
	407
	408	ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	409	if (ret2) {
	410	mlog_errno(ret2);
	411	ret = ret2;
	412	goto cleanup;
	413	}
	414	if (ret > 0) {
	415	ret = ocfs2_set_acl(handle, inode,
	416	di_bh, ACL_TYPE_ACCESS,
	417	acl, meta_ac, data_ac);
89c38bd0	418	}
89c38bd0 TY	419	}
	420	cleanup:
	421	posix_acl_release(acl);
	422	return ret;
	423	}
	424
431547b3	425	static size_t ocfs2_xattr_list_acl_access(struct dentry *dentry,
929fb014 TY	426	char *list,
	427	size_t list_len,
	428	const char *name,
431547b3 CH	429	size_t name_len,
431547b3 CH	430	int type)
929fb014	431	{
431547b3	432	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	433	const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
	434
	435	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	436	return 0;
	437
	438	if (list && size <= list_len)
	439	memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
	440	return size;
	441	}
	442
431547b3	443	static size_t ocfs2_xattr_list_acl_default(struct dentry *dentry,
929fb014 TY	444	char *list,
	445	size_t list_len,
	446	const char *name,
431547b3 CH	447	size_t name_len,
431547b3 CH	448	int type)
929fb014	449	{
431547b3	450	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	451	const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
	452
	453	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	454	return 0;
	455
	456	if (list && size <= list_len)
	457	memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
	458	return size;
	459	}
	460
431547b3 CH	461	static int ocfs2_xattr_get_acl(struct dentry dentry, const char name,
431547b3 CH	462	void *buffer, size_t size, int type)
929fb014	463	{
431547b3	464	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	465	struct posix_acl *acl;
	466	int ret;
	467
431547b3 CH	468	if (strcmp(name, "") != 0)
431547b3 CH	469	return -EINVAL;
929fb014 TY	470	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	471	return -EOPNOTSUPP;
	472
431547b3	473	acl = ocfs2_get_acl(dentry->d_inode, type);
929fb014 TY	474	if (IS_ERR(acl))
	475	return PTR_ERR(acl);
	476	if (acl == NULL)
	477	return -ENODATA;
5f3a4a28	478	ret = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
929fb014 TY	479	posix_acl_release(acl);
	480
	481	return ret;
	482	}
	483
431547b3 CH	484	static int ocfs2_xattr_set_acl(struct dentry dentry, const char name,
431547b3 CH	485	const void *value, size_t size, int flags, int type)
929fb014	486	{
431547b3	487	struct inode *inode = dentry->d_inode;
929fb014 TY	488	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	489	struct posix_acl *acl;
	490	int ret = 0;
	491
431547b3 CH	492	if (strcmp(name, "") != 0)
431547b3 CH	493	return -EINVAL;
929fb014 TY	494	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	495	return -EOPNOTSUPP;
	496
2e149670	497	if (!inode_owner_or_capable(inode))
929fb014 TY	498	return -EPERM;
	499
	500	if (value) {
5f3a4a28	501	acl = posix_acl_from_xattr(&init_user_ns, value, size);
929fb014 TY	502	if (IS_ERR(acl))
	503	return PTR_ERR(acl);
	504	else if (acl) {
	505	ret = posix_acl_valid(acl);
	506	if (ret)
	507	goto cleanup;
	508	}
	509	} else
	510	acl = NULL;
	511
	512	ret = ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);
	513
	514	cleanup:
	515	posix_acl_release(acl);
	516	return ret;
	517	}
	518
537d81ca	519	const struct xattr_handler ocfs2_xattr_acl_access_handler = {
929fb014	520	.prefix = POSIX_ACL_XATTR_ACCESS,
431547b3	521	.flags = ACL_TYPE_ACCESS,
929fb014	522	.list = ocfs2_xattr_list_acl_access,
431547b3 CH	523	.get = ocfs2_xattr_get_acl,
431547b3 CH	524	.set = ocfs2_xattr_set_acl,
929fb014 TY	525	};
929fb014 TY	526
537d81ca	527	const struct xattr_handler ocfs2_xattr_acl_default_handler = {
929fb014	528	.prefix = POSIX_ACL_XATTR_DEFAULT,
431547b3	529	.flags = ACL_TYPE_DEFAULT,
929fb014	530	.list = ocfs2_xattr_list_acl_default,
431547b3 CH	531	.get = ocfs2_xattr_get_acl,
431547b3 CH	532	.set = ocfs2_xattr_set_acl,
929fb014	533	};