[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;
}

/*
 * 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_update_inode_fsync_trans(handle, inode, 0);

	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.
 */
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;

			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;
}

int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	struct buffer_head *bh = NULL;
	int status = 0;

	status = ocfs2_inode_lock(inode, &bh, 1);
	if (status < 0) {
		if (status != -ENOENT)
			mlog_errno(status);
		return status;
	}
	status = ocfs2_set_acl(NULL, inode, bh, type, acl, NULL, NULL);
	ocfs2_inode_unlock(inode, 1);
	brelse(bh);
	return status;
}

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;

	osb = OCFS2_SB(inode->i_sb);
	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
		return NULL;
	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	if (ret < 0) {
		if (ret != -ENOENT)
			mlog_errno(ret);
		return ERR_PTR(ret);
	}

	acl = ocfs2_get_acl_nolock(inode, type, di_bh);

	ocfs2_inode_unlock(inode, 0);
	brelse(di_bh);
	return acl;
}

int ocfs2_acl_chmod(struct inode *inode, struct buffer_head *bh)
{
	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_nolock(inode, ACL_TYPE_ACCESS, bh);
	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;
}
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
fcefd25a MF	163	/*
	164	* Helper function to set i_mode in memory and disk. Some call paths
	165	* will not have di_bh or a journal handle to pass, in which case it
	166	* will create it's own.
	167	*/
	168	static int ocfs2_acl_set_mode(struct inode inode, struct buffer_head di_bh,
	169	handle_t *handle, umode_t new_mode)
	170	{
	171	int ret, commit_handle = 0;
	172	struct ocfs2_dinode *di;
	173
	174	if (di_bh == NULL) {
	175	ret = ocfs2_read_inode_block(inode, &di_bh);
	176	if (ret) {
	177	mlog_errno(ret);
	178	goto out;
	179	}
	180	} else
	181	get_bh(di_bh);
	182
	183	if (handle == NULL) {
	184	handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb),
	185	OCFS2_INODE_UPDATE_CREDITS);
	186	if (IS_ERR(handle)) {
	187	ret = PTR_ERR(handle);
	188	mlog_errno(ret);
	189	goto out_brelse;
	190	}
	191
	192	commit_handle = 1;
	193	}
	194
	195	di = (struct ocfs2_dinode *)di_bh->b_data;
	196	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
	197	OCFS2_JOURNAL_ACCESS_WRITE);
	198	if (ret) {
	199	mlog_errno(ret);
	200	goto out_commit;
	201	}
	202
	203	inode->i_mode = new_mode;
12828061	204	inode->i_ctime = CURRENT_TIME;
fcefd25a	205	di->i_mode = cpu_to_le16(inode->i_mode);
12828061 TM	206	di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
12828061 TM	207	di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
6fdb702d	208	ocfs2_update_inode_fsync_trans(handle, inode, 0);
fcefd25a MF	209
	210	ocfs2_journal_dirty(handle, di_bh);
	211
	212	out_commit:
	213	if (commit_handle)
	214	ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
	215	out_brelse:
	216	brelse(di_bh);
	217	out:
	218	return ret;
	219	}
	220
929fb014 TY	221	/*
	222	* Set the access or default ACL of an inode.
	223	*/
702e5bc6	224	int ocfs2_set_acl(handle_t *handle,
929fb014 TY	225	struct inode *inode,
	226	struct buffer_head *di_bh,
	227	int type,
	228	struct posix_acl *acl,
	229	struct ocfs2_alloc_context *meta_ac,
	230	struct ocfs2_alloc_context *data_ac)
	231	{
	232	int name_index;
	233	void *value = NULL;
	234	size_t size = 0;
	235	int ret;
	236
	237	if (S_ISLNK(inode->i_mode))
	238	return -EOPNOTSUPP;
	239
	240	switch (type) {
	241	case ACL_TYPE_ACCESS:
	242	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	243	if (acl) {
d6952123	244	umode_t mode = inode->i_mode;
929fb014 TY	245	ret = posix_acl_equiv_mode(acl, &mode);
	246	if (ret < 0)
	247	return ret;
fcefd25a	248
e6e74618 FF	249	if (ret == 0)
e6e74618 FF	250	acl = NULL;
fcefd25a	251
e6e74618 FF	252	ret = ocfs2_acl_set_mode(inode, di_bh,
	253	handle, mode);
	254	if (ret)
	255	return ret;
929fb014 TY	256	}
	257	break;
	258	case ACL_TYPE_DEFAULT:
	259	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	260	if (!S_ISDIR(inode->i_mode))
	261	return acl ? -EACCES : 0;
	262	break;
	263	default:
	264	return -EINVAL;
	265	}
	266
	267	if (acl) {
	268	value = ocfs2_acl_to_xattr(acl, &size);
	269	if (IS_ERR(value))
	270	return (int)PTR_ERR(value);
	271	}
	272
	273	if (handle)
	274	ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
	275	"", value, size, 0,
	276	meta_ac, data_ac);
	277	else
	278	ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);
	279
	280	kfree(value);
	281
	282	return ret;
	283	}
	284
702e5bc6 CH	285	int ocfs2_iop_set_acl(struct inode inode, struct posix_acl acl, int type)
702e5bc6 CH	286	{
743b5f14 TS	287	struct buffer_head *bh = NULL;
	288	int status = 0;
	289
	290	status = ocfs2_inode_lock(inode, &bh, 1);
	291	if (status < 0) {
	292	if (status != -ENOENT)
	293	mlog_errno(status);
	294	return status;
	295	}
	296	status = ocfs2_set_acl(NULL, inode, bh, type, acl, NULL, NULL);
	297	ocfs2_inode_unlock(inode, 1);
	298	brelse(bh);
	299	return status;
702e5bc6 CH	300	}
702e5bc6 CH	301
4e34e719	302	struct posix_acl ocfs2_iop_get_acl(struct inode inode, int type)
23fc2702	303	{
b74c79e9	304	struct ocfs2_super *osb;
845b6cf3 JZ	305	struct buffer_head *di_bh = NULL;
845b6cf3 JZ	306	struct posix_acl *acl;
743b5f14	307	int ret;
845b6cf3	308
b74c79e9	309	osb = OCFS2_SB(inode->i_sb);
845b6cf3	310	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
4e34e719	311	return NULL;
743b5f14 TS	312	ret = ocfs2_inode_lock(inode, &di_bh, 0);
	313	if (ret < 0) {
	314	if (ret != -ENOENT)
	315	mlog_errno(ret);
4e34e719	316	return ERR_PTR(ret);
743b5f14	317	}
845b6cf3	318
4e34e719	319	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
845b6cf3	320
743b5f14	321	ocfs2_inode_unlock(inode, 0);
845b6cf3	322	brelse(di_bh);
4e34e719	323	return acl;
23fc2702	324	}
5ee0fbd5 JB	325
	326	int ocfs2_acl_chmod(struct inode inode, struct buffer_head bh)
	327	{
	328	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	329	struct posix_acl *acl;
	330	int ret;
	331
	332	if (S_ISLNK(inode->i_mode))
	333	return -EOPNOTSUPP;
	334
	335	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	336	return 0;
	337
	338	acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, bh);
	339	if (IS_ERR(acl) \|\| !acl)
	340	return PTR_ERR(acl);
	341	ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
	342	if (ret)
	343	return ret;
	344	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
	345	acl, NULL, NULL);
	346	posix_acl_release(acl);
	347	return ret;
	348	}
c25a1e06 JB	349
	350	/*
	351	* Initialize the ACLs of a new inode. If parent directory has default ACL,
	352	* then clone to new inode. Called from ocfs2_mknod.
	353	*/
	354	int ocfs2_init_acl(handle_t *handle,
	355	struct inode *inode,
	356	struct inode *dir,
	357	struct buffer_head *di_bh,
	358	struct buffer_head *dir_bh,
	359	struct ocfs2_alloc_context *meta_ac,
	360	struct ocfs2_alloc_context *data_ac)
	361	{
	362	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	363	struct posix_acl *acl = NULL;
	364	int ret = 0, ret2;
	365	umode_t mode;
	366
	367	if (!S_ISLNK(inode->i_mode)) {
	368	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
	369	acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
	370	dir_bh);
	371	if (IS_ERR(acl))
	372	return PTR_ERR(acl);
	373	}
	374	if (!acl) {
	375	mode = inode->i_mode & ~current_umask();
	376	ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	377	if (ret) {
	378	mlog_errno(ret);
	379	goto cleanup;
	380	}
	381	}
	382	}
	383	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
	384	if (S_ISDIR(inode->i_mode)) {
	385	ret = ocfs2_set_acl(handle, inode, di_bh,
	386	ACL_TYPE_DEFAULT, acl,
	387	meta_ac, data_ac);
	388	if (ret)
	389	goto cleanup;
	390	}
	391	mode = inode->i_mode;
	392	ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
	393	if (ret < 0)
	394	return ret;
	395
	396	ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	397	if (ret2) {
	398	mlog_errno(ret2);
	399	ret = ret2;
	400	goto cleanup;
	401	}
	402	if (ret > 0) {
	403	ret = ocfs2_set_acl(handle, inode,
	404	di_bh, ACL_TYPE_ACCESS,
	405	acl, meta_ac, data_ac);
	406	}
	407	}
	408	cleanup:
	409	posix_acl_release(acl);
	410	return ret;
	411	}