[mirror_ubuntu-hirsute-kernel.git] / fs / ocfs2 / acl.c

// SPDX-License-Identifier: GPL-2.0-only
/* -*- 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>
 */

#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(inode);
	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.
 */
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;
		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);
	if (!ret)
		set_cached_acl(inode, type, acl);

	return ret;
}

int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	struct buffer_head *bh = NULL;
	int status, had_lock;
	struct ocfs2_lock_holder oh;

	had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh);
	if (had_lock < 0)
		return had_lock;
	if (type == ACL_TYPE_ACCESS && acl) {
		umode_t mode;

		status = posix_acl_update_mode(inode, &mode, &acl);
		if (status)
			goto unlock;

		status = ocfs2_acl_set_mode(inode, bh, NULL, mode);
		if (status)
			goto unlock;
	}
	status = ocfs2_set_acl(NULL, inode, bh, type, acl, NULL, NULL);
unlock:
	ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
	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 had_lock;
	struct ocfs2_lock_holder oh;

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

	had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh);
	if (had_lock < 0)
		return ERR_PTR(had_lock);

	down_read(&OCFS2_I(inode)->ip_xattr_sem);
	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
	up_read(&OCFS2_I(inode)->ip_xattr_sem);

	ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
	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;

	down_read(&OCFS2_I(inode)->ip_xattr_sem);
	acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, bh);
	up_read(&OCFS2_I(inode)->ip_xattr_sem);
	if (IS_ERR_OR_NULL(acl))
		return PTR_ERR_OR_ZERO(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) {
			down_read(&OCFS2_I(dir)->ip_xattr_sem);
			acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
						   dir_bh);
			up_read(&OCFS2_I(dir)->ip_xattr_sem);
			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
1802d0be	1	// SPDX-License-Identifier: GPL-2.0-only
929fb014 TY	2	/* -- mode: c; c-basic-offset: 8; --
	3	* vim: noexpandtab sw=8 ts=8 sts=0:
	4	*
	5	* acl.c
	6	*
	7	* Copyright (C) 2004, 2008 Oracle. All rights reserved.
	8	*
	9	* CREDITS:
	10	* Lots of code in this file is copy from linux/fs/ext3/acl.c.
	11	* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
929fb014 TY	12	*/
	13
	14	#include <linux/init.h>
	15	#include <linux/module.h>
5a0e3ad6	16	#include <linux/slab.h>
929fb014 TY	17	#include <linux/string.h>
929fb014 TY	18
929fb014 TY	19	#include <cluster/masklog.h>
	20
	21	#include "ocfs2.h"
	22	#include "alloc.h"
	23	#include "dlmglue.h"
	24	#include "file.h"
fcefd25a MF	25	#include "inode.h"
fcefd25a MF	26	#include "journal.h"
929fb014 TY	27	#include "ocfs2_fs.h"
	28
	29	#include "xattr.h"
	30	#include "acl.h"
	31
	32	/*
	33	* Convert from xattr value to acl struct.
	34	*/
	35	static struct posix_acl ocfs2_acl_from_xattr(const void value, size_t size)
	36	{
	37	int n, count;
	38	struct posix_acl *acl;
	39
	40	if (!value)
	41	return NULL;
	42	if (size < sizeof(struct posix_acl_entry))
	43	return ERR_PTR(-EINVAL);
	44
	45	count = size / sizeof(struct posix_acl_entry);
929fb014 TY	46
	47	acl = posix_acl_alloc(count, GFP_NOFS);
	48	if (!acl)
	49	return ERR_PTR(-ENOMEM);
	50	for (n = 0; n < count; n++) {
	51	struct ocfs2_acl_entry *entry =
	52	(struct ocfs2_acl_entry *)value;
	53
	54	acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
	55	acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
9522751c EB	56	switch(acl->a_entries[n].e_tag) {
	57	case ACL_USER:
	58	acl->a_entries[n].e_uid =
	59	make_kuid(&init_user_ns,
	60	le32_to_cpu(entry->e_id));
	61	break;
	62	case ACL_GROUP:
	63	acl->a_entries[n].e_gid =
	64	make_kgid(&init_user_ns,
	65	le32_to_cpu(entry->e_id));
	66	break;
	67	default:
	68	break;
	69	}
929fb014 TY	70	value += sizeof(struct posix_acl_entry);
	71
	72	}
	73	return acl;
	74	}
	75
	76	/*
	77	* Convert acl struct to xattr value.
	78	*/
	79	static void ocfs2_acl_to_xattr(const struct posix_acl acl, size_t *size)
	80	{
	81	struct ocfs2_acl_entry *entry = NULL;
	82	char *ocfs2_acl;
	83	size_t n;
	84
	85	size = acl->a_count sizeof(struct posix_acl_entry);
	86
	87	ocfs2_acl = kmalloc(*size, GFP_NOFS);
	88	if (!ocfs2_acl)
	89	return ERR_PTR(-ENOMEM);
	90
	91	entry = (struct ocfs2_acl_entry *)ocfs2_acl;
	92	for (n = 0; n < acl->a_count; n++, entry++) {
	93	entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
	94	entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
9522751c EB	95	switch(acl->a_entries[n].e_tag) {
	96	case ACL_USER:
	97	entry->e_id = cpu_to_le32(
	98	from_kuid(&init_user_ns,
	99	acl->a_entries[n].e_uid));
	100	break;
	101	case ACL_GROUP:
	102	entry->e_id = cpu_to_le32(
	103	from_kgid(&init_user_ns,
	104	acl->a_entries[n].e_gid));
	105	break;
	106	default:
	107	entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
	108	break;
	109	}
929fb014 TY	110	}
	111	return ocfs2_acl;
	112	}
	113
	114	static struct posix_acl ocfs2_get_acl_nolock(struct inode inode,
	115	int type,
	116	struct buffer_head *di_bh)
	117	{
929fb014 TY	118	int name_index;
	119	char *value = NULL;
	120	struct posix_acl *acl;
	121	int retval;
	122
929fb014 TY	123	switch (type) {
	124	case ACL_TYPE_ACCESS:
	125	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
	126	break;
	127	case ACL_TYPE_DEFAULT:
	128	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	129	break;
	130	default:
	131	return ERR_PTR(-EINVAL);
	132	}
	133
	134	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index, "", NULL, 0);
	135	if (retval > 0) {
	136	value = kmalloc(retval, GFP_NOFS);
	137	if (!value)
	138	return ERR_PTR(-ENOMEM);
	139	retval = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
	140	"", value, retval);
	141	}
	142
	143	if (retval > 0)
	144	acl = ocfs2_acl_from_xattr(value, retval);
	145	else if (retval == -ENODATA \|\| retval == 0)
	146	acl = NULL;
	147	else
	148	acl = ERR_PTR(retval);
	149
	150	kfree(value);
	151
	152	return acl;
	153	}
	154
fcefd25a MF	155	/*
	156	* Helper function to set i_mode in memory and disk. Some call paths
	157	* will not have di_bh or a journal handle to pass, in which case it
	158	* will create it's own.
	159	*/
	160	static int ocfs2_acl_set_mode(struct inode inode, struct buffer_head di_bh,
	161	handle_t *handle, umode_t new_mode)
	162	{
	163	int ret, commit_handle = 0;
	164	struct ocfs2_dinode *di;
	165
	166	if (di_bh == NULL) {
	167	ret = ocfs2_read_inode_block(inode, &di_bh);
	168	if (ret) {
	169	mlog_errno(ret);
	170	goto out;
	171	}
	172	} else
	173	get_bh(di_bh);
	174
	175	if (handle == NULL) {
	176	handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb),
	177	OCFS2_INODE_UPDATE_CREDITS);
	178	if (IS_ERR(handle)) {
	179	ret = PTR_ERR(handle);
	180	mlog_errno(ret);
	181	goto out_brelse;
	182	}
	183
	184	commit_handle = 1;
	185	}
	186
	187	di = (struct ocfs2_dinode *)di_bh->b_data;
	188	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
	189	OCFS2_JOURNAL_ACCESS_WRITE);
	190	if (ret) {
	191	mlog_errno(ret);
	192	goto out_commit;
	193	}
	194
	195	inode->i_mode = new_mode;
078cd827	196	inode->i_ctime = current_time(inode);
fcefd25a	197	di->i_mode = cpu_to_le16(inode->i_mode);
12828061 TM	198	di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
12828061 TM	199	di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
6fdb702d	200	ocfs2_update_inode_fsync_trans(handle, inode, 0);
fcefd25a MF	201
	202	ocfs2_journal_dirty(handle, di_bh);
	203
	204	out_commit:
	205	if (commit_handle)
	206	ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
	207	out_brelse:
	208	brelse(di_bh);
	209	out:
	210	return ret;
	211	}
	212
929fb014 TY	213	/*
	214	* Set the access or default ACL of an inode.
	215	*/
01ffb56b	216	static int ocfs2_set_acl(handle_t *handle,
929fb014 TY	217	struct inode *inode,
	218	struct buffer_head *di_bh,
	219	int type,
	220	struct posix_acl *acl,
	221	struct ocfs2_alloc_context *meta_ac,
	222	struct ocfs2_alloc_context *data_ac)
	223	{
	224	int name_index;
	225	void *value = NULL;
	226	size_t size = 0;
	227	int ret;
	228
	229	if (S_ISLNK(inode->i_mode))
	230	return -EOPNOTSUPP;
	231
	232	switch (type) {
	233	case ACL_TYPE_ACCESS:
	234	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS;
929fb014 TY	235	break;
	236	case ACL_TYPE_DEFAULT:
	237	name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
	238	if (!S_ISDIR(inode->i_mode))
	239	return acl ? -EACCES : 0;
	240	break;
	241	default:
	242	return -EINVAL;
	243	}
	244
	245	if (acl) {
	246	value = ocfs2_acl_to_xattr(acl, &size);
	247	if (IS_ERR(value))
	248	return (int)PTR_ERR(value);
	249	}
	250
	251	if (handle)
	252	ret = ocfs2_xattr_set_handle(handle, inode, di_bh, name_index,
	253	"", value, size, 0,
	254	meta_ac, data_ac);
	255	else
	256	ret = ocfs2_xattr_set(inode, name_index, "", value, size, 0);
	257
	258	kfree(value);
504ec37d GH	259	if (!ret)
504ec37d GH	260	set_cached_acl(inode, type, acl);
929fb014 TY	261
	262	return ret;
	263	}
	264
702e5bc6 CH	265	int ocfs2_iop_set_acl(struct inode inode, struct posix_acl acl, int type)
702e5bc6 CH	266	{
743b5f14	267	struct buffer_head *bh = NULL;
b891fa50 ER	268	int status, had_lock;
b891fa50 ER	269	struct ocfs2_lock_holder oh;
743b5f14	270
b891fa50 ER	271	had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh);
	272	if (had_lock < 0)
	273	return had_lock;
19ec8e48 JK	274	if (type == ACL_TYPE_ACCESS && acl) {
	275	umode_t mode;
	276
	277	status = posix_acl_update_mode(inode, &mode, &acl);
	278	if (status)
	279	goto unlock;
	280
	281	status = ocfs2_acl_set_mode(inode, bh, NULL, mode);
	282	if (status)
	283	goto unlock;
	284	}
743b5f14	285	status = ocfs2_set_acl(NULL, inode, bh, type, acl, NULL, NULL);
19ec8e48	286	unlock:
b891fa50	287	ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
743b5f14 TS	288	brelse(bh);
743b5f14 TS	289	return status;
702e5bc6 CH	290	}
702e5bc6 CH	291
4e34e719	292	struct posix_acl ocfs2_iop_get_acl(struct inode inode, int type)
23fc2702	293	{
b74c79e9	294	struct ocfs2_super *osb;
845b6cf3 JZ	295	struct buffer_head *di_bh = NULL;
845b6cf3 JZ	296	struct posix_acl *acl;
b891fa50 ER	297	int had_lock;
b891fa50 ER	298	struct ocfs2_lock_holder oh;
845b6cf3	299
b74c79e9	300	osb = OCFS2_SB(inode->i_sb);
845b6cf3	301	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
4e34e719	302	return NULL;
b891fa50 ER	303
	304	had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh);
	305	if (had_lock < 0)
	306	return ERR_PTR(had_lock);
845b6cf3	307
16c8d569	308	down_read(&OCFS2_I(inode)->ip_xattr_sem);
4e34e719	309	acl = ocfs2_get_acl_nolock(inode, type, di_bh);
16c8d569	310	up_read(&OCFS2_I(inode)->ip_xattr_sem);
845b6cf3	311
b891fa50	312	ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
845b6cf3	313	brelse(di_bh);
4e34e719	314	return acl;
23fc2702	315	}
5ee0fbd5 JB	316
	317	int ocfs2_acl_chmod(struct inode inode, struct buffer_head bh)
	318	{
	319	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	320	struct posix_acl *acl;
	321	int ret;
	322
	323	if (S_ISLNK(inode->i_mode))
	324	return -EOPNOTSUPP;
	325
	326	if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
	327	return 0;
	328
16c8d569	329	down_read(&OCFS2_I(inode)->ip_xattr_sem);
5ee0fbd5	330	acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, bh);
16c8d569	331	up_read(&OCFS2_I(inode)->ip_xattr_sem);
188c523e DX	332	if (IS_ERR_OR_NULL(acl))
188c523e DX	333	return PTR_ERR_OR_ZERO(acl);
5ee0fbd5 JB	334	ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
	335	if (ret)
	336	return ret;
	337	ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
	338	acl, NULL, NULL);
	339	posix_acl_release(acl);
	340	return ret;
	341	}
c25a1e06 JB	342
	343	/*
	344	* Initialize the ACLs of a new inode. If parent directory has default ACL,
	345	* then clone to new inode. Called from ocfs2_mknod.
	346	*/
	347	int ocfs2_init_acl(handle_t *handle,
	348	struct inode *inode,
	349	struct inode *dir,
	350	struct buffer_head *di_bh,
	351	struct buffer_head *dir_bh,
	352	struct ocfs2_alloc_context *meta_ac,
	353	struct ocfs2_alloc_context *data_ac)
	354	{
	355	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	356	struct posix_acl *acl = NULL;
	357	int ret = 0, ret2;
	358	umode_t mode;
	359
	360	if (!S_ISLNK(inode->i_mode)) {
	361	if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
16c8d569	362	down_read(&OCFS2_I(dir)->ip_xattr_sem);
c25a1e06 JB	363	acl = ocfs2_get_acl_nolock(dir, ACL_TYPE_DEFAULT,
c25a1e06 JB	364	dir_bh);
16c8d569	365	up_read(&OCFS2_I(dir)->ip_xattr_sem);
c25a1e06 JB	366	if (IS_ERR(acl))
	367	return PTR_ERR(acl);
	368	}
	369	if (!acl) {
	370	mode = inode->i_mode & ~current_umask();
	371	ret = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	372	if (ret) {
	373	mlog_errno(ret);
	374	goto cleanup;
	375	}
	376	}
	377	}
	378	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
	379	if (S_ISDIR(inode->i_mode)) {
	380	ret = ocfs2_set_acl(handle, inode, di_bh,
	381	ACL_TYPE_DEFAULT, acl,
	382	meta_ac, data_ac);
	383	if (ret)
	384	goto cleanup;
	385	}
	386	mode = inode->i_mode;
	387	ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
	388	if (ret < 0)
	389	return ret;
	390
	391	ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
	392	if (ret2) {
	393	mlog_errno(ret2);
	394	ret = ret2;
	395	goto cleanup;
	396	}
	397	if (ret > 0) {
	398	ret = ocfs2_set_acl(handle, inode,
	399	di_bh, ACL_TYPE_ACCESS,
	400	acl, meta_ac, data_ac);
	401	}
	402	}
	403	cleanup:
	404	posix_acl_release(acl);
	405	return ret;
	406	}