[linux-block.git] / fs / f2fs / acl.c

// SPDX-License-Identifier: GPL-2.0
/*
 * fs/f2fs/acl.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * Portions of this code from linux/fs/ext2/acl.c
 *
 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
 */
#include <linux/f2fs_fs.h>
#include "f2fs.h"
#include "xattr.h"
#include "acl.h"

static inline size_t f2fs_acl_size(int count)
{
	if (count <= 4) {
		return sizeof(struct f2fs_acl_header) +
			count * sizeof(struct f2fs_acl_entry_short);
	} else {
		return sizeof(struct f2fs_acl_header) +
			4 * sizeof(struct f2fs_acl_entry_short) +
			(count - 4) * sizeof(struct f2fs_acl_entry);
	}
}

static inline int f2fs_acl_count(size_t size)
{
	ssize_t s;
	size -= sizeof(struct f2fs_acl_header);
	s = size - 4 * sizeof(struct f2fs_acl_entry_short);
	if (s < 0) {
		if (size % sizeof(struct f2fs_acl_entry_short))
			return -1;
		return size / sizeof(struct f2fs_acl_entry_short);
	} else {
		if (s % sizeof(struct f2fs_acl_entry))
			return -1;
		return s / sizeof(struct f2fs_acl_entry) + 4;
	}
}

static struct posix_acl *f2fs_acl_from_disk(const char *value, size_t size)
{
	int i, count;
	struct posix_acl *acl;
	struct f2fs_acl_header *hdr = (struct f2fs_acl_header *)value;
	struct f2fs_acl_entry *entry = (struct f2fs_acl_entry *)(hdr + 1);
	const char *end = value + size;

	if (size < sizeof(struct f2fs_acl_header))
		return ERR_PTR(-EINVAL);

	if (hdr->a_version != cpu_to_le32(F2FS_ACL_VERSION))
		return ERR_PTR(-EINVAL);

	count = f2fs_acl_count(size);
	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 (i = 0; i < count; i++) {

		if ((char *)entry > end)
			goto fail;

		acl->a_entries[i].e_tag  = le16_to_cpu(entry->e_tag);
		acl->a_entries[i].e_perm = le16_to_cpu(entry->e_perm);

		switch (acl->a_entries[i].e_tag) {
		case ACL_USER_OBJ:
		case ACL_GROUP_OBJ:
		case ACL_MASK:
		case ACL_OTHER:
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry_short));
			break;

		case ACL_USER:
			acl->a_entries[i].e_uid =
				make_kuid(&init_user_ns,
						le32_to_cpu(entry->e_id));
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry));
			break;
		case ACL_GROUP:
			acl->a_entries[i].e_gid =
				make_kgid(&init_user_ns,
						le32_to_cpu(entry->e_id));
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry));
			break;
		default:
			goto fail;
		}
	}
	if ((char *)entry != end)
		goto fail;
	return acl;
fail:
	posix_acl_release(acl);
	return ERR_PTR(-EINVAL);
}

static void *f2fs_acl_to_disk(struct f2fs_sb_info *sbi,
				const struct posix_acl *acl, size_t *size)
{
	struct f2fs_acl_header *f2fs_acl;
	struct f2fs_acl_entry *entry;
	int i;

	f2fs_acl = f2fs_kmalloc(sbi, sizeof(struct f2fs_acl_header) +
			acl->a_count * sizeof(struct f2fs_acl_entry),
			GFP_NOFS);
	if (!f2fs_acl)
		return ERR_PTR(-ENOMEM);

	f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION);
	entry = (struct f2fs_acl_entry *)(f2fs_acl + 1);

	for (i = 0; i < acl->a_count; i++) {

		entry->e_tag  = cpu_to_le16(acl->a_entries[i].e_tag);
		entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm);

		switch (acl->a_entries[i].e_tag) {
		case ACL_USER:
			entry->e_id = cpu_to_le32(
					from_kuid(&init_user_ns,
						acl->a_entries[i].e_uid));
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry));
			break;
		case ACL_GROUP:
			entry->e_id = cpu_to_le32(
					from_kgid(&init_user_ns,
						acl->a_entries[i].e_gid));
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry));
			break;
		case ACL_USER_OBJ:
		case ACL_GROUP_OBJ:
		case ACL_MASK:
		case ACL_OTHER:
			entry = (struct f2fs_acl_entry *)((char *)entry +
					sizeof(struct f2fs_acl_entry_short));
			break;
		default:
			goto fail;
		}
	}
	*size = f2fs_acl_size(acl->a_count);
	return (void *)f2fs_acl;

fail:
	kfree(f2fs_acl);
	return ERR_PTR(-EINVAL);
}

static struct posix_acl *__f2fs_get_acl(struct inode *inode, int type,
						struct page *dpage)
{
	int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	void *value = NULL;
	struct posix_acl *acl;
	int retval;

	if (type == ACL_TYPE_ACCESS)
		name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;

	retval = f2fs_getxattr(inode, name_index, "", NULL, 0, dpage);
	if (retval > 0) {
		value = f2fs_kmalloc(F2FS_I_SB(inode), retval, GFP_F2FS_ZERO);
		if (!value)
			return ERR_PTR(-ENOMEM);
		retval = f2fs_getxattr(inode, name_index, "", value,
							retval, dpage);
	}

	if (retval > 0)
		acl = f2fs_acl_from_disk(value, retval);
	else if (retval == -ENODATA)
		acl = NULL;
	else
		acl = ERR_PTR(retval);
	kfree(value);

	return acl;
}

struct posix_acl *f2fs_get_acl(struct inode *inode, int type)
{
	return __f2fs_get_acl(inode, type, NULL);
}

static int __f2fs_set_acl(struct inode *inode, int type,
			struct posix_acl *acl, struct page *ipage)
{
	int name_index;
	void *value = NULL;
	size_t size = 0;
	int error;
	umode_t mode = inode->i_mode;

	switch (type) {
	case ACL_TYPE_ACCESS:
		name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
		if (acl && !ipage) {
			error = posix_acl_update_mode(&init_user_ns, inode,
						      &mode, &acl);
			if (error)
				return error;
			set_acl_inode(inode, mode);
		}
		break;

	case ACL_TYPE_DEFAULT:
		name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
		if (!S_ISDIR(inode->i_mode))
			return acl ? -EACCES : 0;
		break;

	default:
		return -EINVAL;
	}

	if (acl) {
		value = f2fs_acl_to_disk(F2FS_I_SB(inode), acl, &size);
		if (IS_ERR(value)) {
			clear_inode_flag(inode, FI_ACL_MODE);
			return PTR_ERR(value);
		}
	}

	error = f2fs_setxattr(inode, name_index, "", value, size, ipage, 0);

	kfree(value);
	if (!error)
		set_cached_acl(inode, type, acl);

	clear_inode_flag(inode, FI_ACL_MODE);
	return error;
}

int f2fs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
		 struct posix_acl *acl, int type)
{
	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
		return -EIO;

	return __f2fs_set_acl(inode, type, acl, NULL);
}

/*
 * Most part of f2fs_acl_clone, f2fs_acl_create_masq, f2fs_acl_create
 * are copied from posix_acl.c
 */
static struct posix_acl *f2fs_acl_clone(const struct posix_acl *acl,
							gfp_t flags)
{
	struct posix_acl *clone = NULL;

	if (acl) {
		int size = sizeof(struct posix_acl) + acl->a_count *
				sizeof(struct posix_acl_entry);
		clone = kmemdup(acl, size, flags);
		if (clone)
			refcount_set(&clone->a_refcount, 1);
	}
	return clone;
}

static int f2fs_acl_create_masq(struct posix_acl *acl, umode_t *mode_p)
{
	struct posix_acl_entry *pa, *pe;
	struct posix_acl_entry *group_obj = NULL, *mask_obj = NULL;
	umode_t mode = *mode_p;
	int not_equiv = 0;

	/* assert(atomic_read(acl->a_refcount) == 1); */

	FOREACH_ACL_ENTRY(pa, acl, pe) {
		switch (pa->e_tag) {
		case ACL_USER_OBJ:
			pa->e_perm &= (mode >> 6) | ~S_IRWXO;
			mode &= (pa->e_perm << 6) | ~S_IRWXU;
			break;

		case ACL_USER:
		case ACL_GROUP:
			not_equiv = 1;
			break;

		case ACL_GROUP_OBJ:
			group_obj = pa;
			break;

		case ACL_OTHER:
			pa->e_perm &= mode | ~S_IRWXO;
			mode &= pa->e_perm | ~S_IRWXO;
			break;

		case ACL_MASK:
			mask_obj = pa;
			not_equiv = 1;
			break;

		default:
			return -EIO;
		}
	}

	if (mask_obj) {
		mask_obj->e_perm &= (mode >> 3) | ~S_IRWXO;
		mode &= (mask_obj->e_perm << 3) | ~S_IRWXG;
	} else {
		if (!group_obj)
			return -EIO;
		group_obj->e_perm &= (mode >> 3) | ~S_IRWXO;
		mode &= (group_obj->e_perm << 3) | ~S_IRWXG;
	}

	*mode_p = (*mode_p & ~S_IRWXUGO) | mode;
	return not_equiv;
}

static int f2fs_acl_create(struct inode *dir, umode_t *mode,
		struct posix_acl **default_acl, struct posix_acl **acl,
		struct page *dpage)
{
	struct posix_acl *p;
	struct posix_acl *clone;
	int ret;

	*acl = NULL;
	*default_acl = NULL;

	if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
		return 0;

	p = __f2fs_get_acl(dir, ACL_TYPE_DEFAULT, dpage);
	if (!p || p == ERR_PTR(-EOPNOTSUPP)) {
		*mode &= ~current_umask();
		return 0;
	}
	if (IS_ERR(p))
		return PTR_ERR(p);

	clone = f2fs_acl_clone(p, GFP_NOFS);
	if (!clone) {
		ret = -ENOMEM;
		goto release_acl;
	}

	ret = f2fs_acl_create_masq(clone, mode);
	if (ret < 0)
		goto release_clone;

	if (ret == 0)
		posix_acl_release(clone);
	else
		*acl = clone;

	if (!S_ISDIR(*mode))
		posix_acl_release(p);
	else
		*default_acl = p;

	return 0;

release_clone:
	posix_acl_release(clone);
release_acl:
	posix_acl_release(p);
	return ret;
}

int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage,
							struct page *dpage)
{
	struct posix_acl *default_acl = NULL, *acl = NULL;
	int error;

	error = f2fs_acl_create(dir, &inode->i_mode, &default_acl, &acl, dpage);
	if (error)
		return error;

	f2fs_mark_inode_dirty_sync(inode, true);

	if (default_acl) {
		error = __f2fs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl,
				       ipage);
		posix_acl_release(default_acl);
	} else {
		inode->i_default_acl = NULL;
	}
	if (acl) {
		if (!error)
			error = __f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl,
					       ipage);
		posix_acl_release(acl);
	} else {
		inode->i_acl = NULL;
	}

	return error;
}
Commit	Line	Data
7c1a000d	1	// SPDX-License-Identifier: GPL-2.0
0a8165d7	2	/*
af48b85b JK	3	* fs/f2fs/acl.c
	4	*
	5	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	6	* http://www.samsung.com/
	7	*
	8	* Portions of this code from linux/fs/ext2/acl.c
	9	*
	10	* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
af48b85b JK	11	*/
	12	#include <linux/f2fs_fs.h>
	13	#include "f2fs.h"
	14	#include "xattr.h"
	15	#include "acl.h"
	16
af48b85b JK	17	static inline size_t f2fs_acl_size(int count)
	18	{
	19	if (count <= 4) {
	20	return sizeof(struct f2fs_acl_header) +
	21	count * sizeof(struct f2fs_acl_entry_short);
	22	} else {
	23	return sizeof(struct f2fs_acl_header) +
	24	4 * sizeof(struct f2fs_acl_entry_short) +
	25	(count - 4) * sizeof(struct f2fs_acl_entry);
	26	}
	27	}
	28
	29	static inline int f2fs_acl_count(size_t size)
	30	{
	31	ssize_t s;
	32	size -= sizeof(struct f2fs_acl_header);
	33	s = size - 4 * sizeof(struct f2fs_acl_entry_short);
	34	if (s < 0) {
	35	if (size % sizeof(struct f2fs_acl_entry_short))
	36	return -1;
	37	return size / sizeof(struct f2fs_acl_entry_short);
	38	} else {
	39	if (s % sizeof(struct f2fs_acl_entry))
	40	return -1;
	41	return s / sizeof(struct f2fs_acl_entry) + 4;
	42	}
	43	}
	44
	45	static struct posix_acl f2fs_acl_from_disk(const char value, size_t size)
	46	{
	47	int i, count;
	48	struct posix_acl *acl;
	49	struct f2fs_acl_header hdr = (struct f2fs_acl_header )value;
	50	struct f2fs_acl_entry entry = (struct f2fs_acl_entry )(hdr + 1);
	51	const char *end = value + size;
	52
1618e6e2 CX	53	if (size < sizeof(struct f2fs_acl_header))
	54	return ERR_PTR(-EINVAL);
	55
af48b85b JK	56	if (hdr->a_version != cpu_to_le32(F2FS_ACL_VERSION))
	57	return ERR_PTR(-EINVAL);
	58
	59	count = f2fs_acl_count(size);
	60	if (count < 0)
	61	return ERR_PTR(-EINVAL);
	62	if (count == 0)
	63	return NULL;
	64
dd802406	65	acl = posix_acl_alloc(count, GFP_NOFS);
af48b85b JK	66	if (!acl)
	67	return ERR_PTR(-ENOMEM);
	68
	69	for (i = 0; i < count; i++) {
	70
	71	if ((char *)entry > end)
	72	goto fail;
	73
	74	acl->a_entries[i].e_tag = le16_to_cpu(entry->e_tag);
	75	acl->a_entries[i].e_perm = le16_to_cpu(entry->e_perm);
	76
	77	switch (acl->a_entries[i].e_tag) {
	78	case ACL_USER_OBJ:
	79	case ACL_GROUP_OBJ:
	80	case ACL_MASK:
	81	case ACL_OTHER:
af48b85b JK	82	entry = (struct f2fs_acl_entry )((char )entry +
	83	sizeof(struct f2fs_acl_entry_short));
	84	break;
	85
	86	case ACL_USER:
	87	acl->a_entries[i].e_uid =
	88	make_kuid(&init_user_ns,
	89	le32_to_cpu(entry->e_id));
	90	entry = (struct f2fs_acl_entry )((char )entry +
	91	sizeof(struct f2fs_acl_entry));
	92	break;
	93	case ACL_GROUP:
	94	acl->a_entries[i].e_gid =
	95	make_kgid(&init_user_ns,
	96	le32_to_cpu(entry->e_id));
	97	entry = (struct f2fs_acl_entry )((char )entry +
	98	sizeof(struct f2fs_acl_entry));
	99	break;
	100	default:
	101	goto fail;
	102	}
	103	}
	104	if ((char *)entry != end)
	105	goto fail;
	106	return acl;
	107	fail:
	108	posix_acl_release(acl);
	109	return ERR_PTR(-EINVAL);
	110	}
	111
1ecc0c5c CY	112	static void f2fs_acl_to_disk(struct f2fs_sb_info sbi,
1ecc0c5c CY	113	const struct posix_acl acl, size_t size)
af48b85b JK	114	{
	115	struct f2fs_acl_header *f2fs_acl;
	116	struct f2fs_acl_entry *entry;
	117	int i;
	118
1ecc0c5c CY	119	f2fs_acl = f2fs_kmalloc(sbi, sizeof(struct f2fs_acl_header) +
	120	acl->a_count * sizeof(struct f2fs_acl_entry),
	121	GFP_NOFS);
af48b85b JK	122	if (!f2fs_acl)
	123	return ERR_PTR(-ENOMEM);
	124
	125	f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION);
	126	entry = (struct f2fs_acl_entry *)(f2fs_acl + 1);
	127
	128	for (i = 0; i < acl->a_count; i++) {
	129
	130	entry->e_tag = cpu_to_le16(acl->a_entries[i].e_tag);
	131	entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm);
	132
	133	switch (acl->a_entries[i].e_tag) {
	134	case ACL_USER:
	135	entry->e_id = cpu_to_le32(
	136	from_kuid(&init_user_ns,
	137	acl->a_entries[i].e_uid));
	138	entry = (struct f2fs_acl_entry )((char )entry +
	139	sizeof(struct f2fs_acl_entry));
	140	break;
	141	case ACL_GROUP:
	142	entry->e_id = cpu_to_le32(
	143	from_kgid(&init_user_ns,
	144	acl->a_entries[i].e_gid));
	145	entry = (struct f2fs_acl_entry )((char )entry +
	146	sizeof(struct f2fs_acl_entry));
	147	break;
	148	case ACL_USER_OBJ:
	149	case ACL_GROUP_OBJ:
	150	case ACL_MASK:
	151	case ACL_OTHER:
	152	entry = (struct f2fs_acl_entry )((char )entry +
	153	sizeof(struct f2fs_acl_entry_short));
	154	break;
	155	default:
	156	goto fail;
	157	}
	158	}
	159	*size = f2fs_acl_size(acl->a_count);
	160	return (void *)f2fs_acl;
	161
	162	fail:
c8eb7024	163	kfree(f2fs_acl);
af48b85b JK	164	return ERR_PTR(-EINVAL);
	165	}
	166
bce8d112 JK	167	static struct posix_acl __f2fs_get_acl(struct inode inode, int type,
bce8d112 JK	168	struct page *dpage)
af48b85b	169	{
af48b85b JK	170	int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	171	void *value = NULL;
	172	struct posix_acl *acl;
	173	int retval;
	174
af48b85b JK	175	if (type == ACL_TYPE_ACCESS)
	176	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
	177
bce8d112	178	retval = f2fs_getxattr(inode, name_index, "", NULL, 0, dpage);
af48b85b	179	if (retval > 0) {
1ecc0c5c	180	value = f2fs_kmalloc(F2FS_I_SB(inode), retval, GFP_F2FS_ZERO);
af48b85b JK	181	if (!value)
af48b85b JK	182	return ERR_PTR(-ENOMEM);
bce8d112 JK	183	retval = f2fs_getxattr(inode, name_index, "", value,
bce8d112 JK	184	retval, dpage);
af48b85b JK	185	}
af48b85b JK	186
c1b75eab	187	if (retval > 0)
af48b85b	188	acl = f2fs_acl_from_disk(value, retval);
c1b75eab JK	189	else if (retval == -ENODATA)
	190	acl = NULL;
	191	else
	192	acl = ERR_PTR(retval);
c8eb7024	193	kfree(value);
c1b75eab	194
af48b85b JK	195	return acl;
	196	}
	197
bce8d112 JK	198	struct posix_acl f2fs_get_acl(struct inode inode, int type)
	199	{
	200	return __f2fs_get_acl(inode, type, NULL);
	201	}
	202
a6dda0e6	203	static int __f2fs_set_acl(struct inode *inode, int type,
2ed2d5b3	204	struct posix_acl acl, struct page ipage)
af48b85b	205	{
af48b85b JK	206	int name_index;
	207	void *value = NULL;
	208	size_t size = 0;
	209	int error;
14af20fc	210	umode_t mode = inode->i_mode;
af48b85b	211
af48b85b JK	212	switch (type) {
	213	case ACL_TYPE_ACCESS:
	214	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
c925dc16	215	if (acl && !ipage) {
e65ce2a5 CB	216	error = posix_acl_update_mode(&init_user_ns, inode,
e65ce2a5 CB	217	&mode, &acl);
07393101	218	if (error)
af48b85b	219	return error;
14af20fc	220	set_acl_inode(inode, mode);
af48b85b JK	221	}
	222	break;
	223
	224	case ACL_TYPE_DEFAULT:
	225	name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	226	if (!S_ISDIR(inode->i_mode))
	227	return acl ? -EACCES : 0;
	228	break;
	229
	230	default:
	231	return -EINVAL;
	232	}
	233
	234	if (acl) {
1ecc0c5c	235	value = f2fs_acl_to_disk(F2FS_I_SB(inode), acl, &size);
af48b85b	236	if (IS_ERR(value)) {
91942321	237	clear_inode_flag(inode, FI_ACL_MODE);
68390dd9	238	return PTR_ERR(value);
af48b85b JK	239	}
	240	}
	241
c02745ef	242	error = f2fs_setxattr(inode, name_index, "", value, size, ipage, 0);
af48b85b	243
c8eb7024	244	kfree(value);
af48b85b JK	245	if (!error)
	246	set_cached_acl(inode, type, acl);
	247
91942321	248	clear_inode_flag(inode, FI_ACL_MODE);
af48b85b JK	249	return error;
	250	}
	251
549c7297 CB	252	int f2fs_set_acl(struct user_namespace mnt_userns, struct inode inode,
549c7297 CB	253	struct posix_acl *acl, int type)
af48b85b	254	{
1f227a3e JK	255	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
	256	return -EIO;
	257
a6dda0e6	258	return __f2fs_set_acl(inode, type, acl, NULL);
af48b85b JK	259	}
af48b85b JK	260
bce8d112 JK	261	/*
	262	* Most part of f2fs_acl_clone, f2fs_acl_create_masq, f2fs_acl_create
	263	* are copied from posix_acl.c
	264	*/
	265	static struct posix_acl f2fs_acl_clone(const struct posix_acl acl,
	266	gfp_t flags)
	267	{
	268	struct posix_acl *clone = NULL;
	269
	270	if (acl) {
	271	int size = sizeof(struct posix_acl) + acl->a_count *
	272	sizeof(struct posix_acl_entry);
	273	clone = kmemdup(acl, size, flags);
	274	if (clone)
66717260	275	refcount_set(&clone->a_refcount, 1);
bce8d112 JK	276	}
	277	return clone;
	278	}
	279
	280	static int f2fs_acl_create_masq(struct posix_acl acl, umode_t mode_p)
	281	{
	282	struct posix_acl_entry pa, pe;
	283	struct posix_acl_entry group_obj = NULL, mask_obj = NULL;
	284	umode_t mode = *mode_p;
	285	int not_equiv = 0;
	286
	287	/* assert(atomic_read(acl->a_refcount) == 1); */
	288
	289	FOREACH_ACL_ENTRY(pa, acl, pe) {
c456362b	290	switch (pa->e_tag) {
bce8d112 JK	291	case ACL_USER_OBJ:
	292	pa->e_perm &= (mode >> 6) \| ~S_IRWXO;
	293	mode &= (pa->e_perm << 6) \| ~S_IRWXU;
	294	break;
	295
	296	case ACL_USER:
	297	case ACL_GROUP:
	298	not_equiv = 1;
	299	break;
	300
	301	case ACL_GROUP_OBJ:
	302	group_obj = pa;
	303	break;
	304
	305	case ACL_OTHER:
	306	pa->e_perm &= mode \| ~S_IRWXO;
	307	mode &= pa->e_perm \| ~S_IRWXO;
	308	break;
	309
	310	case ACL_MASK:
	311	mask_obj = pa;
	312	not_equiv = 1;
	313	break;
	314
	315	default:
	316	return -EIO;
	317	}
	318	}
	319
	320	if (mask_obj) {
	321	mask_obj->e_perm &= (mode >> 3) \| ~S_IRWXO;
	322	mode &= (mask_obj->e_perm << 3) \| ~S_IRWXG;
	323	} else {
	324	if (!group_obj)
	325	return -EIO;
	326	group_obj->e_perm &= (mode >> 3) \| ~S_IRWXO;
	327	mode &= (group_obj->e_perm << 3) \| ~S_IRWXG;
	328	}
	329
	330	mode_p = (mode_p & ~S_IRWXUGO) \| mode;
3a912b77	331	return not_equiv;
bce8d112 JK	332	}
	333
	334	static int f2fs_acl_create(struct inode dir, umode_t mode,
	335	struct posix_acl default_acl, struct posix_acl acl,
	336	struct page *dpage)
	337	{
	338	struct posix_acl *p;
272e083f	339	struct posix_acl *clone;
bce8d112 JK	340	int ret;
bce8d112 JK	341
272e083f CY	342	*acl = NULL;
	343	*default_acl = NULL;
	344
bce8d112	345	if (S_ISLNK(*mode) \|\| !IS_POSIXACL(dir))
272e083f	346	return 0;
bce8d112 JK	347
bce8d112 JK	348	p = __f2fs_get_acl(dir, ACL_TYPE_DEFAULT, dpage);
272e083f CY	349	if (!p \|\| p == ERR_PTR(-EOPNOTSUPP)) {
	350	*mode &= ~current_umask();
	351	return 0;
bce8d112	352	}
272e083f CY	353	if (IS_ERR(p))
272e083f CY	354	return PTR_ERR(p);
bce8d112	355
272e083f	356	clone = f2fs_acl_clone(p, GFP_NOFS);
f6176473 TY	357	if (!clone) {
	358	ret = -ENOMEM;
	359	goto release_acl;
	360	}
bce8d112	361
272e083f	362	ret = f2fs_acl_create_masq(clone, mode);
83dfe53c	363	if (ret < 0)
f6176473	364	goto release_clone;
bce8d112	365
272e083f CY	366	if (ret == 0)
	367	posix_acl_release(clone);
	368	else
	369	*acl = clone;
bce8d112	370
272e083f	371	if (!S_ISDIR(*mode))
bce8d112	372	posix_acl_release(p);
272e083f	373	else
bce8d112	374	*default_acl = p;
bce8d112	375
bce8d112	376	return 0;
83dfe53c	377
f6176473	378	release_clone:
272e083f	379	posix_acl_release(clone);
f6176473	380	release_acl:
83dfe53c	381	posix_acl_release(p);
f6176473	382	return ret;
bce8d112 JK	383	}
	384
	385	int f2fs_init_acl(struct inode inode, struct inode dir, struct page *ipage,
	386	struct page *dpage)
af48b85b	387	{
bce8d112	388	struct posix_acl default_acl = NULL, acl = NULL;
beb78181	389	int error;
af48b85b	390
bce8d112	391	error = f2fs_acl_create(dir, &inode->i_mode, &default_acl, &acl, dpage);
af48b85b JK	392	if (error)
af48b85b JK	393	return error;
b8b60e1a	394
7c45729a	395	f2fs_mark_inode_dirty_sync(inode, true);
205b9822	396
a6dda0e6 CH	397	if (default_acl) {
	398	error = __f2fs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl,
	399	ipage);
	400	posix_acl_release(default_acl);
313ed62a CX	401	} else {
313ed62a CX	402	inode->i_default_acl = NULL;
a6dda0e6 CH	403	}
a6dda0e6 CH	404	if (acl) {
3b6709b7	405	if (!error)
a6dda0e6 CH	406	error = __f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl,
	407	ipage);
	408	posix_acl_release(acl);
313ed62a CX	409	} else {
313ed62a CX	410	inode->i_acl = NULL;
af48b85b JK	411	}
af48b85b JK	412
af48b85b JK	413	return error;
af48b85b JK	414	}