[linux.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, <[email protected]>
 *
 * 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);
	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);
		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, <[email protected]>
	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);
	54	if (count < 0)
	55	return ERR_PTR(-EINVAL);
	56	if (count == 0)
	57	return NULL;
	58
	59	acl = posix_acl_alloc(count, GFP_NOFS);
	60	if (!acl)
	61	return ERR_PTR(-ENOMEM);
	62	for (n = 0; n < count; n++) {
	63	struct ocfs2_acl_entry *entry =
	64	(struct ocfs2_acl_entry *)value;
	65
	66	acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
	67	acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
9522751c EB	68	switch(acl->a_entries[n].e_tag) {
	69	case ACL_USER:
	70	acl->a_entries[n].e_uid =
	71	make_kuid(&init_user_ns,
	72	le32_to_cpu(entry->e_id));
	73	break;
	74	case ACL_GROUP:
	75	acl->a_entries[n].e_gid =
	76	make_kgid(&init_user_ns,
	77	le32_to_cpu(entry->e_id));
	78	break;
	79	default:
	80	break;
	81	}
929fb014 TY	82	value += sizeof(struct posix_acl_entry);
	83
	84	}
	85	return acl;
	86	}
	87
	88	/*
	89	* Convert acl struct to xattr value.
	90	*/
	91	static void ocfs2_acl_to_xattr(const struct posix_acl acl, size_t *size)
	92	{
	93	struct ocfs2_acl_entry *entry = NULL;
	94	char *ocfs2_acl;
	95	size_t n;
	96
	97	size = acl->a_count sizeof(struct posix_acl_entry);
	98
	99	ocfs2_acl = kmalloc(*size, GFP_NOFS);
	100	if (!ocfs2_acl)
	101	return ERR_PTR(-ENOMEM);
	102
	103	entry = (struct ocfs2_acl_entry *)ocfs2_acl;
	104	for (n = 0; n < acl->a_count; n++, entry++) {
	105	entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
	106	entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
9522751c EB	107	switch(acl->a_entries[n].e_tag) {
	108	case ACL_USER:
	109	entry->e_id = cpu_to_le32(
	110	from_kuid(&init_user_ns,
	111	acl->a_entries[n].e_uid));
	112	break;
	113	case ACL_GROUP:
	114	entry->e_id = cpu_to_le32(
	115	from_kgid(&init_user_ns,
	116	acl->a_entries[n].e_gid));
	117	break;
	118	default:
	119	entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
	120	break;
	121	}
929fb014 TY	122	}
	123	return ocfs2_acl;
	124	}
	125
	126	static struct posix_acl ocfs2_get_acl_nolock(struct inode inode,
	127	int type,
	128	struct buffer_head *di_bh)
	129	{
929fb014 TY	130	int name_index;
	131	char *value = NULL;
	132	struct posix_acl *acl;
	133	int retval;
	134
929fb014 TY	135	switch (type) {
	136	case ACL_TYPE_ACCESS:
	137	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	138	break;
	139	case ACL_TYPE_DEFAULT:
	140	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	141	break;
	142	default:
	143	return ERR_PTR(-EINVAL);
	144	}
	145
	146	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index, "", NULL, 0);
	147	if (retval > 0) {
	148	value = kmalloc(retval, GFP_NOFS);
	149	if (!value)
	150	return ERR_PTR(-ENOMEM);
	151	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
	152	"", value, retval);
	153	}
	154
	155	if (retval > 0)
	156	acl = ocfs2_acl_from_xattr(value, retval);
	157	else if (retval == -ENODATA \|\| retval == 0)
	158	acl = NULL;
	159	else
	160	acl = ERR_PTR(retval);
	161
	162	kfree(value);
	163
	164	return acl;
	165	}
	166
	167
	168	/*
	169	* Get posix acl.
	170	*/
	171	static struct posix_acl ocfs2_get_acl(struct inode inode, int type)
	172	{
	173	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	174	struct buffer_head *di_bh = NULL;
	175	struct posix_acl *acl;
	176	int ret;
	177
	178	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	179	return NULL;
	180
	181	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	182	if (ret < 0) {
	183	mlog_errno(ret);
	184	acl = ERR_PTR(ret);
	185	return acl;
	186	}
	187
	188	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
	189
	190	ocfs2_inode_unlock(inode, 0);
	191
	192	brelse(di_bh);
	193
	194	return acl;
	195	}
	196
fcefd25a MF	197	/*
	198	* Helper function to set i_mode in memory and disk. Some call paths
	199	* will not have di_bh or a journal handle to pass, in which case it
	200	* will create it's own.
	201	*/
	202	static int ocfs2_acl_set_mode(struct inode inode, struct buffer_head di_bh,
	203	handle_t *handle, umode_t new_mode)
	204	{
	205	int ret, commit_handle = 0;
	206	struct ocfs2_dinode *di;
	207
	208	if (di_bh == NULL) {
	209	ret = ocfs2_read_inode_block(inode, &di_bh);
	210	if (ret) {
	211	mlog_errno(ret);
	212	goto out;
	213	}
	214	} else
	215	get_bh(di_bh);
	216
	217	if (handle == NULL) {
	218	handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb),
	219	OCFS2_INODE_UPDATE_CREDITS);
	220	if (IS_ERR(handle)) {
	221	ret = PTR_ERR(handle);
	222	mlog_errno(ret);
	223	goto out_brelse;
	224	}
	225
	226	commit_handle = 1;
	227	}
	228
	229	di = (struct ocfs2_dinode *)di_bh->b_data;
	230	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
	231	OCFS2_JOURNAL_ACCESS_WRITE);
	232	if (ret) {
	233	mlog_errno(ret);
	234	goto out_commit;
	235	}
	236
	237	inode->i_mode = new_mode;
12828061	238	inode->i_ctime = CURRENT_TIME;
fcefd25a	239	di->i_mode = cpu_to_le16(inode->i_mode);
12828061 TM	240	di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
12828061 TM	241	di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
fcefd25a MF	242
	243	ocfs2_journal_dirty(handle, di_bh);
	244
	245	out_commit:
	246	if (commit_handle)
	247	ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
	248	out_brelse:
	249	brelse(di_bh);
	250	out:
	251	return ret;
	252	}
	253
929fb014 TY	254	/*
	255	* Set the access or default ACL of an inode.
	256	*/
	257	static int ocfs2_set_acl(handle_t *handle,
	258	struct inode *inode,
	259	struct buffer_head *di_bh,
	260	int type,
	261	struct posix_acl *acl,
	262	struct ocfs2_alloc_context *meta_ac,
	263	struct ocfs2_alloc_context *data_ac)
	264	{
	265	int name_index;
	266	void *value = NULL;
	267	size_t size = 0;
	268	int ret;
	269
	270	if (S_ISLNK(inode->i_mode))
	271	return -EOPNOTSUPP;
	272
	273	switch (type) {
	274	case ACL_TYPE_ACCESS:
	275	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	276	if (acl) {
d6952123	277	umode_t mode = inode->i_mode;
929fb014 TY	278	ret = posix_acl_equiv_mode(acl, &mode);
	279	if (ret < 0)
	280	return ret;
	281	else {
929fb014 TY	282	if (ret == 0)
929fb014 TY	283	acl = NULL;
fcefd25a MF	284
	285	ret = ocfs2_acl_set_mode(inode, di_bh,
	286	handle, mode);
	287	if (ret)
	288	return ret;
	289
929fb014 TY	290	}
	291	}
	292	break;
	293	case ACL_TYPE_DEFAULT:
	294	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	295	if (!S_ISDIR(inode->i_mode))
	296	return acl ? -EACCES : 0;
	297	break;
	298	default:
	299	return -EINVAL;
	300	}
	301
	302	if (acl) {
	303	value = ocfs2_acl_to_xattr(acl, &size);
	304	if (IS_ERR(value))
	305	return (int)PTR_ERR(value);
	306	}
	307
	308	if (handle)
	309	ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
	310	"", value, size, 0,
	311	meta_ac, data_ac);
	312	else
	313	ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);
	314
	315	kfree(value);
	316
	317	return ret;
	318	}
	319
4e34e719	320	struct posix_acl ocfs2_iop_get_acl(struct inode inode, int type)
23fc2702	321	{
b74c79e9	322	struct ocfs2_super *osb;
845b6cf3 JZ	323	struct buffer_head *di_bh = NULL;
	324	struct posix_acl *acl;
	325	int ret = -EAGAIN;
	326
b74c79e9	327	osb = OCFS2_SB(inode->i_sb);
845b6cf3	328	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
4e34e719	329	return NULL;
23fc2702	330
845b6cf3	331	ret = ocfs2_read_inode_block(inode, &di_bh);
4e34e719 CH	332	if (ret < 0)
4e34e719 CH	333	return ERR_PTR(ret);
845b6cf3	334
4e34e719	335	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
845b6cf3 JZ	336
	337	brelse(di_bh);
	338
4e34e719	339	return acl;
23fc2702 TY	340	}
23fc2702 TY	341
060bc66d TY	342	int ocfs2_acl_chmod(struct inode *inode)
	343	{
	344	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
bc26ab5f	345	struct posix_acl *acl;
060bc66d TY	346	int ret;
	347
	348	if (S_ISLNK(inode->i_mode))
	349	return -EOPNOTSUPP;
	350
	351	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	352	return 0;
	353
	354	acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
	355	if (IS_ERR(acl) \|\| !acl)
	356	return PTR_ERR(acl);
bc26ab5f AV	357	ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
	358	if (ret)
	359	return ret;
	360	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
	361	acl, NULL, NULL);
060bc66d	362	posix_acl_release(acl);
060bc66d TY	363	return ret;
	364	}
	365
89c38bd0 TY	366	/*
	367	* Initialize the ACLs of a new inode. If parent directory has default ACL,
	368	* then clone to new inode. Called from ocfs2_mknod.
	369	*/
	370	int ocfs2_init_acl(handle_t *handle,
	371	struct inode *inode,
	372	struct inode *dir,
	373	struct buffer_head *di_bh,
	374	struct buffer_head *dir_bh,
	375	struct ocfs2_alloc_context *meta_ac,
	376	struct ocfs2_alloc_context *data_ac)
	377	{
	378	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	379	struct posix_acl *acl = NULL;
6eda3dd3	380	int ret = 0, ret2;
d3fb6120	381	umode_t mode;
89c38bd0 TY	382
	383	if (!S_ISLNK(inode->i_mode)) {
	384	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
	385	acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
	386	dir_bh);
	387	if (IS_ERR(acl))
	388	return PTR_ERR(acl);
	389	}
fcefd25a MF	390	if (!acl) {
	391	mode = inode->i_mode & ~current_umask();
	392	ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	393	if (ret) {
	394	mlog_errno(ret);
	395	goto cleanup;
	396	}
	397	}
89c38bd0 TY	398	}
89c38bd0 TY	399	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
89c38bd0 TY	400	if (S_ISDIR(inode->i_mode)) {
	401	ret = ocfs2_set_acl(handle, inode, di_bh,
	402	ACL_TYPE_DEFAULT, acl,
	403	meta_ac, data_ac);
	404	if (ret)
	405	goto cleanup;
	406	}
89c38bd0	407	mode = inode->i_mode;
826cae2f AV	408	ret = posix_acl_create(&acl, GFP_NOFS, &mode);
	409	if (ret < 0)
	410	return ret;
	411
	412	ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	413	if (ret2) {
	414	mlog_errno(ret2);
	415	ret = ret2;
	416	goto cleanup;
	417	}
	418	if (ret > 0) {
	419	ret = ocfs2_set_acl(handle, inode,
	420	di_bh, ACL_TYPE_ACCESS,
	421	acl, meta_ac, data_ac);
89c38bd0	422	}
89c38bd0 TY	423	}
	424	cleanup:
	425	posix_acl_release(acl);
	426	return ret;
	427	}
	428
431547b3	429	static size_t ocfs2_xattr_list_acl_access(struct dentry *dentry,
929fb014 TY	430	char *list,
	431	size_t list_len,
	432	const char *name,
431547b3 CH	433	size_t name_len,
431547b3 CH	434	int type)
929fb014	435	{
431547b3	436	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	437	const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
	438
	439	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	440	return 0;
	441
	442	if (list && size <= list_len)
	443	memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
	444	return size;
	445	}
	446
431547b3	447	static size_t ocfs2_xattr_list_acl_default(struct dentry *dentry,
929fb014 TY	448	char *list,
	449	size_t list_len,
	450	const char *name,
431547b3 CH	451	size_t name_len,
431547b3 CH	452	int type)
929fb014	453	{
431547b3	454	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	455	const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
	456
	457	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	458	return 0;
	459
	460	if (list && size <= list_len)
	461	memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
	462	return size;
	463	}
	464
431547b3 CH	465	static int ocfs2_xattr_get_acl(struct dentry dentry, const char name,
431547b3 CH	466	void *buffer, size_t size, int type)
929fb014	467	{
431547b3	468	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
929fb014 TY	469	struct posix_acl *acl;
	470	int ret;
	471
431547b3 CH	472	if (strcmp(name, "") != 0)
431547b3 CH	473	return -EINVAL;
929fb014 TY	474	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	475	return -EOPNOTSUPP;
	476
431547b3	477	acl = ocfs2_get_acl(dentry->d_inode, type);
929fb014 TY	478	if (IS_ERR(acl))
	479	return PTR_ERR(acl);
	480	if (acl == NULL)
	481	return -ENODATA;
5f3a4a28	482	ret = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
929fb014 TY	483	posix_acl_release(acl);
	484
	485	return ret;
	486	}
	487
431547b3 CH	488	static int ocfs2_xattr_set_acl(struct dentry dentry, const char name,
431547b3 CH	489	const void *value, size_t size, int flags, int type)
929fb014	490	{
431547b3	491	struct inode *inode = dentry->d_inode;
929fb014 TY	492	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	493	struct posix_acl *acl;
	494	int ret = 0;
	495
431547b3 CH	496	if (strcmp(name, "") != 0)
431547b3 CH	497	return -EINVAL;
929fb014 TY	498	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	499	return -EOPNOTSUPP;
	500
2e149670	501	if (!inode_owner_or_capable(inode))
929fb014 TY	502	return -EPERM;
	503
	504	if (value) {
5f3a4a28	505	acl = posix_acl_from_xattr(&init_user_ns, value, size);
929fb014 TY	506	if (IS_ERR(acl))
	507	return PTR_ERR(acl);
	508	else if (acl) {
	509	ret = posix_acl_valid(acl);
	510	if (ret)
	511	goto cleanup;
	512	}
	513	} else
	514	acl = NULL;
	515
	516	ret = ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL);
	517
	518	cleanup:
	519	posix_acl_release(acl);
	520	return ret;
	521	}
	522
537d81ca	523	const struct xattr_handler ocfs2_xattr_acl_access_handler = {
929fb014	524	.prefix = POSIX_ACL_XATTR_ACCESS,
431547b3	525	.flags = ACL_TYPE_ACCESS,
929fb014	526	.list = ocfs2_xattr_list_acl_access,
431547b3 CH	527	.get = ocfs2_xattr_get_acl,
431547b3 CH	528	.set = ocfs2_xattr_set_acl,
929fb014 TY	529	};
929fb014 TY	530
537d81ca	531	const struct xattr_handler ocfs2_xattr_acl_default_handler = {
929fb014	532	.prefix = POSIX_ACL_XATTR_DEFAULT,
431547b3	533	.flags = ACL_TYPE_DEFAULT,
929fb014	534	.list = ocfs2_xattr_list_acl_default,
431547b3 CH	535	.get = ocfs2_xattr_get_acl,
431547b3 CH	536	.set = ocfs2_xattr_set_acl,
929fb014	537	};