[linux-block.git] / fs / 9p / acl.c

// SPDX-License-Identifier: LGPL-2.1
/*
 * Copyright IBM Corporation, 2010
 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
 */

#include <linux/module.h>
#include <linux/fs.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/posix_acl_xattr.h>
#include "xattr.h"
#include "acl.h"
#include "v9fs.h"
#include "v9fs_vfs.h"
#include "fid.h"

static struct posix_acl *v9fs_fid_get_acl(struct p9_fid *fid, const char *name)
{
	ssize_t size;
	void *value = NULL;
	struct posix_acl *acl = NULL;

	size = v9fs_fid_xattr_get(fid, name, NULL, 0);
	if (size < 0)
		return ERR_PTR(size);
	if (size == 0)
		return ERR_PTR(-ENODATA);

	value = kzalloc(size, GFP_NOFS);
	if (!value)
		return ERR_PTR(-ENOMEM);

	size = v9fs_fid_xattr_get(fid, name, value, size);
	if (size < 0)
		acl = ERR_PTR(size);
	else if (size == 0)
		acl = ERR_PTR(-ENODATA);
	else
		acl = posix_acl_from_xattr(&init_user_ns, value, size);
	kfree(value);
	return acl;
}

static struct posix_acl *v9fs_acl_get(struct dentry *dentry, const char *name)
{
	struct p9_fid *fid;
	struct posix_acl *acl = NULL;

	fid = v9fs_fid_lookup(dentry);
	if (IS_ERR(fid))
		return ERR_CAST(fid);

	acl = v9fs_fid_get_acl(fid, name);
	p9_fid_put(fid);
	return acl;
}

static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, const char *name)
{
	int retval;
	struct posix_acl *acl = NULL;

	acl = v9fs_fid_get_acl(fid, name);
	if (!IS_ERR(acl))
		return acl;

	retval = PTR_ERR(acl);
	if (retval == -ENODATA || retval == -ENOSYS || retval == -EOPNOTSUPP)
		return NULL;

	/* map everything else to -EIO */
	return ERR_PTR(-EIO);
}

int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
{
	int retval = 0;
	struct posix_acl *pacl, *dacl;
	struct v9fs_session_info *v9ses;

	v9ses = v9fs_inode2v9ses(inode);
	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
		set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL);
		set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
		return 0;
	}
	/* get the default/access acl values and cache them */
	dacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_DEFAULT);
	pacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_ACCESS);

	if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
		set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
		set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
	} else
		retval = -EIO;

	if (!IS_ERR(dacl))
		posix_acl_release(dacl);

	if (!IS_ERR(pacl))
		posix_acl_release(pacl);

	return retval;
}

static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
{
	struct posix_acl *acl;
	/*
	 * 9p Always cache the acl value when
	 * instantiating the inode (v9fs_inode_from_fid)
	 */
	acl = get_cached_acl(inode, type);
	BUG_ON(is_uncached_acl(acl));
	return acl;
}

struct posix_acl *v9fs_iop_get_inode_acl(struct inode *inode, int type, bool rcu)
{
	struct v9fs_session_info *v9ses;

	if (rcu)
		return ERR_PTR(-ECHILD);

	v9ses = v9fs_inode2v9ses(inode);
	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
		/*
		 * On access = client  and acl = on mode get the acl
		 * values from the server
		 */
		return NULL;
	}
	return v9fs_get_cached_acl(inode, type);

}

struct posix_acl *v9fs_iop_get_acl(struct mnt_idmap *idmap,
				   struct dentry *dentry, int type)
{
	struct v9fs_session_info *v9ses;

	v9ses = v9fs_dentry2v9ses(dentry);
	/* We allow set/get/list of acl when access=client is not specified. */
	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
		return v9fs_acl_get(dentry, posix_acl_xattr_name(type));
	return v9fs_get_cached_acl(d_inode(dentry), type);
}

int v9fs_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
		     struct posix_acl *acl, int type)
{
	int retval;
	size_t size = 0;
	void *value = NULL;
	const char *acl_name;
	struct v9fs_session_info *v9ses;
	struct inode *inode = d_inode(dentry);

	if (acl) {
		retval = posix_acl_valid(inode->i_sb->s_user_ns, acl);
		if (retval)
			goto err_out;

		size = posix_acl_xattr_size(acl->a_count);

		value = kzalloc(size, GFP_NOFS);
		if (!value) {
			retval = -ENOMEM;
			goto err_out;
		}

		retval = posix_acl_to_xattr(&init_user_ns, acl, value, size);
		if (retval < 0)
			goto err_out;
	}

	/*
	 * set the attribute on the remote. Without even looking at the
	 * xattr value. We leave it to the server to validate
	 */
	acl_name = posix_acl_xattr_name(type);
	v9ses = v9fs_dentry2v9ses(dentry);
	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
		retval = v9fs_xattr_set(dentry, acl_name, value, size, 0);
		goto err_out;
	}

	if (S_ISLNK(inode->i_mode)) {
		retval = -EOPNOTSUPP;
		goto err_out;
	}

	if (!inode_owner_or_capable(&nop_mnt_idmap, inode)) {
		retval = -EPERM;
		goto err_out;
	}

	switch (type) {
	case ACL_TYPE_ACCESS:
		if (acl) {
			struct iattr iattr = {};
			struct posix_acl *acl_mode = acl;

			retval = posix_acl_update_mode(&nop_mnt_idmap, inode,
						       &iattr.ia_mode,
						       &acl_mode);
			if (retval)
				goto err_out;
			if (!acl_mode) {
				/*
				 * ACL can be represented by the mode bits.
				 * So don't update ACL below.
				 */
				kfree(value);
				value = NULL;
				size = 0;
			}
			iattr.ia_valid = ATTR_MODE;
			/*
			 * FIXME should we update ctime ?
			 * What is the following setxattr update the mode ?
			 */
			v9fs_vfs_setattr_dotl(&nop_mnt_idmap, dentry, &iattr);
		}
		break;
	case ACL_TYPE_DEFAULT:
		if (!S_ISDIR(inode->i_mode)) {
			retval = acl ? -EINVAL : 0;
			goto err_out;
		}
		break;
	}

	retval = v9fs_xattr_set(dentry, acl_name, value, size, 0);
	if (!retval)
		set_cached_acl(inode, type, acl);

err_out:
	kfree(value);
	return retval;
}

static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
{
	int retval;
	char *name;
	size_t size;
	void *buffer;

	if (!acl)
		return 0;

	/* Set a setxattr request to server */
	size = posix_acl_xattr_size(acl->a_count);
	buffer = kmalloc(size, GFP_KERNEL);
	if (!buffer)
		return -ENOMEM;
	retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
	if (retval < 0)
		goto err_free_out;
	switch (type) {
	case ACL_TYPE_ACCESS:
		name = XATTR_NAME_POSIX_ACL_ACCESS;
		break;
	case ACL_TYPE_DEFAULT:
		name = XATTR_NAME_POSIX_ACL_DEFAULT;
		break;
	default:
		BUG();
	}
	retval = v9fs_fid_xattr_set(fid, name, buffer, size, 0);
err_free_out:
	kfree(buffer);
	return retval;
}

int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid)
{
	int retval = 0;
	struct posix_acl *acl;

	if (S_ISLNK(inode->i_mode))
		return -EOPNOTSUPP;
	acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
	if (acl) {
		retval = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
		if (retval)
			return retval;
		set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
		retval = v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
		posix_acl_release(acl);
	}
	return retval;
}

int v9fs_set_create_acl(struct inode *inode, struct p9_fid *fid,
			struct posix_acl *dacl, struct posix_acl *acl)
{
	set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
	set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
	v9fs_set_acl(fid, ACL_TYPE_DEFAULT, dacl);
	v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
	return 0;
}

void v9fs_put_acl(struct posix_acl *dacl,
		  struct posix_acl *acl)
{
	posix_acl_release(dacl);
	posix_acl_release(acl);
}

int v9fs_acl_mode(struct inode *dir, umode_t *modep,
		  struct posix_acl **dpacl, struct posix_acl **pacl)
{
	int retval = 0;
	umode_t mode = *modep;
	struct posix_acl *acl = NULL;

	if (!S_ISLNK(mode)) {
		acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT);
		if (IS_ERR(acl))
			return PTR_ERR(acl);
		if (!acl)
			mode &= ~current_umask();
	}
	if (acl) {
		if (S_ISDIR(mode))
			*dpacl = posix_acl_dup(acl);
		retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
		if (retval < 0)
			return retval;
		if (retval > 0)
			*pacl = acl;
		else
			posix_acl_release(acl);
	}
	*modep  = mode;
	return 0;
}
Commit	Line	Data
024b7d6a	1	// SPDX-License-Identifier: LGPL-2.1
85ff872d AK	2	/*
	3	* Copyright IBM Corporation, 2010
	4	* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
85ff872d AK	5	*/
	6
	7	#include <linux/module.h>
	8	#include <linux/fs.h>
	9	#include <net/9p/9p.h>
	10	#include <net/9p/client.h>
	11	#include <linux/slab.h>
22d8dcdf	12	#include <linux/sched.h>
85ff872d AK	13	#include <linux/posix_acl_xattr.h>
	14	#include "xattr.h"
	15	#include "acl.h"
76381a42	16	#include "v9fs.h"
5ffc0cb3	17	#include "v9fs_vfs.h"
0f235cae	18	#include "fid.h"
85ff872d	19
6cd4d4e8	20	static struct posix_acl v9fs_fid_get_acl(struct p9_fid fid, const char *name)
85ff872d AK	21	{
	22	ssize_t size;
	23	void *value = NULL;
009ca389	24	struct posix_acl *acl = NULL;
85ff872d AK	25
85ff872d AK	26	size = v9fs_fid_xattr_get(fid, name, NULL, 0);
6cd4d4e8 CB	27	if (size < 0)
	28	return ERR_PTR(size);
	29	if (size == 0)
	30	return ERR_PTR(-ENODATA);
	31
	32	value = kzalloc(size, GFP_NOFS);
	33	if (!value)
	34	return ERR_PTR(-ENOMEM);
	35
	36	size = v9fs_fid_xattr_get(fid, name, value, size);
	37	if (size < 0)
	38	acl = ERR_PTR(size);
	39	else if (size == 0)
	40	acl = ERR_PTR(-ENODATA);
	41	else
	42	acl = posix_acl_from_xattr(&init_user_ns, value, size);
85ff872d AK	43	kfree(value);
	44	return acl;
	45	}
	46
6cd4d4e8 CB	47	static struct posix_acl v9fs_acl_get(struct dentry dentry, const char *name)
	48	{
	49	struct p9_fid *fid;
	50	struct posix_acl *acl = NULL;
	51
	52	fid = v9fs_fid_lookup(dentry);
	53	if (IS_ERR(fid))
	54	return ERR_CAST(fid);
	55
	56	acl = v9fs_fid_get_acl(fid, name);
	57	p9_fid_put(fid);
	58	return acl;
	59	}
	60
	61	static struct posix_acl __v9fs_get_acl(struct p9_fid fid, const char *name)
	62	{
	63	int retval;
	64	struct posix_acl *acl = NULL;
	65
	66	acl = v9fs_fid_get_acl(fid, name);
	67	if (!IS_ERR(acl))
	68	return acl;
	69
	70	retval = PTR_ERR(acl);
	71	if (retval == -ENODATA \|\| retval == -ENOSYS \|\| retval == -EOPNOTSUPP)
	72	return NULL;
	73
	74	/* map everything else to -EIO */
	75	return ERR_PTR(-EIO);
	76	}
	77
85ff872d AK	78	int v9fs_get_acl(struct inode inode, struct p9_fid fid)
	79	{
	80	int retval = 0;
	81	struct posix_acl pacl, dacl;
76381a42	82	struct v9fs_session_info *v9ses;
85ff872d	83
76381a42	84	v9ses = v9fs_inode2v9ses(inode);
e782ef71 VJJ	85	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) \|\|
e782ef71 VJJ	86	((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
76381a42 AK	87	set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL);
	88	set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
	89	return 0;
	90	}
85ff872d	91	/* get the default/access acl values and cache them */
97d79299 AG	92	dacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_DEFAULT);
97d79299 AG	93	pacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_ACCESS);
85ff872d AK	94
	95	if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
	96	set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
	97	set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
85ff872d AK	98	} else
	99	retval = -EIO;
	100
c61fa0d6 VJJ	101	if (!IS_ERR(dacl))
	102	posix_acl_release(dacl);
	103
	104	if (!IS_ERR(pacl))
	105	posix_acl_release(pacl);
	106
85ff872d AK	107	return retval;
	108	}
	109
	110	static struct posix_acl v9fs_get_cached_acl(struct inode inode, int type)
	111	{
	112	struct posix_acl *acl;
	113	/*
	114	* 9p Always cache the acl value when
	115	* instantiating the inode (v9fs_inode_from_fid)
	116	*/
	117	acl = get_cached_acl(inode, type);
b8a7a3a6	118	BUG_ON(is_uncached_acl(acl));
85ff872d AK	119	return acl;
	120	}
	121
6cd4d4e8	122	struct posix_acl v9fs_iop_get_inode_acl(struct inode inode, int type, bool rcu)
85ff872d	123	{
76381a42 AK	124	struct v9fs_session_info *v9ses;
76381a42 AK	125
0cad6246 MS	126	if (rcu)
	127	return ERR_PTR(-ECHILD);
	128
76381a42	129	v9ses = v9fs_inode2v9ses(inode);
e782ef71 VJJ	130	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) \|\|
e782ef71 VJJ	131	((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
76381a42	132	/*
e782ef71	133	* On access = client and acl = on mode get the acl
76381a42 AK	134	* values from the server
76381a42 AK	135	*/
4e34e719	136	return NULL;
76381a42	137	}
4e34e719 CH	138	return v9fs_get_cached_acl(inode, type);
4e34e719 CH	139
85ff872d	140	}
7a4566b0	141
77435322	142	struct posix_acl v9fs_iop_get_acl(struct mnt_idmap idmap,
6cd4d4e8 CB	143	struct dentry *dentry, int type)
	144	{
	145	struct v9fs_session_info *v9ses;
	146
	147	v9ses = v9fs_dentry2v9ses(dentry);
	148	/* We allow set/get/list of acl when access=client is not specified. */
	149	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
	150	return v9fs_acl_get(dentry, posix_acl_xattr_name(type));
	151	return v9fs_get_cached_acl(d_inode(dentry), type);
	152	}
	153
13e83a49	154	int v9fs_iop_set_acl(struct mnt_idmap idmap, struct dentry dentry,
079da629 CB	155	struct posix_acl *acl, int type)
	156	{
	157	int retval;
	158	size_t size = 0;
	159	void *value = NULL;
	160	const char *acl_name;
	161	struct v9fs_session_info *v9ses;
	162	struct inode *inode = d_inode(dentry);
	163
	164	if (acl) {
	165	retval = posix_acl_valid(inode->i_sb->s_user_ns, acl);
	166	if (retval)
	167	goto err_out;
	168
	169	size = posix_acl_xattr_size(acl->a_count);
	170
	171	value = kzalloc(size, GFP_NOFS);
	172	if (!value) {
	173	retval = -ENOMEM;
	174	goto err_out;
	175	}
	176
	177	retval = posix_acl_to_xattr(&init_user_ns, acl, value, size);
	178	if (retval < 0)
	179	goto err_out;
	180	}
	181
	182	/*
	183	* set the attribute on the remote. Without even looking at the
	184	* xattr value. We leave it to the server to validate
	185	*/
	186	acl_name = posix_acl_xattr_name(type);
	187	v9ses = v9fs_dentry2v9ses(dentry);
	188	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
	189	retval = v9fs_xattr_set(dentry, acl_name, value, size, 0);
	190	goto err_out;
	191	}
	192
	193	if (S_ISLNK(inode->i_mode)) {
	194	retval = -EOPNOTSUPP;
	195	goto err_out;
	196	}
	197
01beba79	198	if (!inode_owner_or_capable(&nop_mnt_idmap, inode)) {
079da629 CB	199	retval = -EPERM;
	200	goto err_out;
	201	}
	202
	203	switch (type) {
	204	case ACL_TYPE_ACCESS:
	205	if (acl) {
	206	struct iattr iattr = {};
	207	struct posix_acl *acl_mode = acl;
	208
700b7940	209	retval = posix_acl_update_mode(&nop_mnt_idmap, inode,
079da629 CB	210	&iattr.ia_mode,
	211	&acl_mode);
	212	if (retval)
	213	goto err_out;
	214	if (!acl_mode) {
	215	/*
	216	* ACL can be represented by the mode bits.
	217	* So don't update ACL below.
	218	*/
	219	kfree(value);
	220	value = NULL;
	221	size = 0;
	222	}
	223	iattr.ia_valid = ATTR_MODE;
	224	/*
	225	* FIXME should we update ctime ?
	226	* What is the following setxattr update the mode ?
	227	*/
c1632a0f	228	v9fs_vfs_setattr_dotl(&nop_mnt_idmap, dentry, &iattr);
079da629 CB	229	}
	230	break;
	231	case ACL_TYPE_DEFAULT:
	232	if (!S_ISDIR(inode->i_mode)) {
	233	retval = acl ? -EINVAL : 0;
	234	goto err_out;
	235	}
	236	break;
	237	}
	238
	239	retval = v9fs_xattr_set(dentry, acl_name, value, size, 0);
	240	if (!retval)
	241	set_cached_acl(inode, type, acl);
	242
	243	err_out:
	244	kfree(value);
	245	return retval;
	246	}
	247
0f235cae	248	static int v9fs_set_acl(struct p9_fid fid, int type, struct posix_acl acl)
6e8dc555 AK	249	{
	250	int retval;
	251	char *name;
	252	size_t size;
	253	void *buffer;
6e195b0f	254
d344b0fb VJJ	255	if (!acl)
	256	return 0;
	257
6e8dc555 AK	258	/* Set a setxattr request to server */
	259	size = posix_acl_xattr_size(acl->a_count);
	260	buffer = kmalloc(size, GFP_KERNEL);
	261	if (!buffer)
	262	return -ENOMEM;
5f3a4a28	263	retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
6e8dc555 AK	264	if (retval < 0)
	265	goto err_free_out;
	266	switch (type) {
	267	case ACL_TYPE_ACCESS:
97d79299	268	name = XATTR_NAME_POSIX_ACL_ACCESS;
6e8dc555 AK	269	break;
6e8dc555 AK	270	case ACL_TYPE_DEFAULT:
97d79299	271	name = XATTR_NAME_POSIX_ACL_DEFAULT;
6e8dc555 AK	272	break;
	273	default:
	274	BUG();
	275	}
0f235cae	276	retval = v9fs_fid_xattr_set(fid, name, buffer, size, 0);
6e8dc555 AK	277	err_free_out:
	278	kfree(buffer);
	279	return retval;
	280	}
	281
be308f07	282	int v9fs_acl_chmod(struct inode inode, struct p9_fid fid)
6e8dc555 AK	283	{
6e8dc555 AK	284	int retval = 0;
bc26ab5f	285	struct posix_acl *acl;
6e8dc555 AK	286
	287	if (S_ISLNK(inode->i_mode))
	288	return -EOPNOTSUPP;
	289	acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
	290	if (acl) {
5bf3258f	291	retval = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
bc26ab5f AV	292	if (retval)
bc26ab5f AV	293	return retval;
7f165aaa	294	set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
0f235cae	295	retval = v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
6e8dc555	296	posix_acl_release(acl);
6e8dc555 AK	297	}
	298	return retval;
	299	}
	300
3592ac44	301	int v9fs_set_create_acl(struct inode inode, struct p9_fid fid,
5fa6300a	302	struct posix_acl dacl, struct posix_acl acl)
ad77dbce	303	{
3592ac44 AV	304	set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
	305	set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
	306	v9fs_set_acl(fid, ACL_TYPE_DEFAULT, dacl);
	307	v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
ad77dbce AK	308	return 0;
	309	}
	310
5fa6300a AV	311	void v9fs_put_acl(struct posix_acl *dacl,
	312	struct posix_acl *acl)
	313	{
	314	posix_acl_release(dacl);
	315	posix_acl_release(acl);
	316	}
	317
d3fb6120	318	int v9fs_acl_mode(struct inode dir, umode_t modep,
ad77dbce AK	319	struct posix_acl dpacl, struct posix_acl pacl)
	320	{
	321	int retval = 0;
d3fb6120	322	umode_t mode = *modep;
ad77dbce AK	323	struct posix_acl *acl = NULL;
	324
	325	if (!S_ISLNK(mode)) {
	326	acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT);
	327	if (IS_ERR(acl))
	328	return PTR_ERR(acl);
	329	if (!acl)
	330	mode &= ~current_umask();
	331	}
	332	if (acl) {
ad77dbce	333	if (S_ISDIR(mode))
1ec95bf3	334	*dpacl = posix_acl_dup(acl);
37bc1539	335	retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
826cae2f AV	336	if (retval < 0)
826cae2f AV	337	return retval;
ad77dbce	338	if (retval > 0)
826cae2f	339	*pacl = acl;
1ec95bf3	340	else
826cae2f	341	posix_acl_release(acl);
ad77dbce AK	342	}
	343	*modep = mode;
	344	return 0;
ad77dbce	345	}