[mirror_ubuntu-artful-kernel.git] / fs / f2fs / acl.c

/*
 * 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>
 *
 * 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.
 */
#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 (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(const struct posix_acl *acl, size_t *size)
{
	struct f2fs_acl_header *f2fs_acl;
	struct f2fs_acl_entry *entry;
	int i;

	f2fs_acl = kmalloc(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 = kmalloc(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)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);
	int name_index;
	void *value = NULL;
	size_t size = 0;
	int error;

	switch (type) {
	case ACL_TYPE_ACCESS:
		name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
		if (acl) {
			error = posix_acl_equiv_mode(acl, &inode->i_mode);
			if (error < 0)
				return error;
			set_acl_inode(fi, inode->i_mode);
			if (error == 0)
				acl = NULL;
		}
		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(acl, &size);
		if (IS_ERR(value)) {
			clear_inode_flag(fi, FI_ACL_MODE);
			return (int)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(fi, FI_ACL_MODE);
	return error;
}

int f2fs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	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)
			atomic_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)
		goto no_mem;

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

no_mem_clone:
	posix_acl_release(clone);
no_mem:
	posix_acl_release(p);
	return -ENOMEM;
}

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 = 0;

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

	if (default_acl) {
		error = __f2fs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl,
				       ipage);
		posix_acl_release(default_acl);
	}
	if (acl) {
		if (!error)
			error = __f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl,
					       ipage);
		posix_acl_release(acl);
	}

	return error;
}
Commit	Line	Data
0a8165d7	1	/*
af48b85b JK	2	* fs/f2fs/acl.c
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	*
	7	* Portions of this code from linux/fs/ext2/acl.c
	8	*
	9	* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15	#include <linux/f2fs_fs.h>
	16	#include "f2fs.h"
	17	#include "xattr.h"
	18	#include "acl.h"
	19
af48b85b JK	20	static inline size_t f2fs_acl_size(int count)
	21	{
	22	if (count <= 4) {
	23	return sizeof(struct f2fs_acl_header) +
	24	count * sizeof(struct f2fs_acl_entry_short);
	25	} else {
	26	return sizeof(struct f2fs_acl_header) +
	27	4 * sizeof(struct f2fs_acl_entry_short) +
	28	(count - 4) * sizeof(struct f2fs_acl_entry);
	29	}
	30	}
	31
	32	static inline int f2fs_acl_count(size_t size)
	33	{
	34	ssize_t s;
	35	size -= sizeof(struct f2fs_acl_header);
	36	s = size - 4 * sizeof(struct f2fs_acl_entry_short);
	37	if (s < 0) {
	38	if (size % sizeof(struct f2fs_acl_entry_short))
	39	return -1;
	40	return size / sizeof(struct f2fs_acl_entry_short);
	41	} else {
	42	if (s % sizeof(struct f2fs_acl_entry))
	43	return -1;
	44	return s / sizeof(struct f2fs_acl_entry) + 4;
	45	}
	46	}
	47
	48	static struct posix_acl f2fs_acl_from_disk(const char value, size_t size)
	49	{
	50	int i, count;
	51	struct posix_acl *acl;
	52	struct f2fs_acl_header hdr = (struct f2fs_acl_header )value;
	53	struct f2fs_acl_entry entry = (struct f2fs_acl_entry )(hdr + 1);
	54	const char *end = value + size;
	55
	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
	112	static void f2fs_acl_to_disk(const struct posix_acl acl, size_t *size)
	113	{
	114	struct f2fs_acl_header *f2fs_acl;
	115	struct f2fs_acl_entry *entry;
	116	int i;
	117
	118	f2fs_acl = kmalloc(sizeof(struct f2fs_acl_header) + acl->a_count *
dd802406	119	sizeof(struct f2fs_acl_entry), GFP_NOFS);
af48b85b JK	120	if (!f2fs_acl)
	121	return ERR_PTR(-ENOMEM);
	122
	123	f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION);
	124	entry = (struct f2fs_acl_entry *)(f2fs_acl + 1);
	125
	126	for (i = 0; i < acl->a_count; i++) {
	127
	128	entry->e_tag = cpu_to_le16(acl->a_entries[i].e_tag);
	129	entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm);
	130
	131	switch (acl->a_entries[i].e_tag) {
	132	case ACL_USER:
	133	entry->e_id = cpu_to_le32(
	134	from_kuid(&init_user_ns,
	135	acl->a_entries[i].e_uid));
	136	entry = (struct f2fs_acl_entry )((char )entry +
	137	sizeof(struct f2fs_acl_entry));
	138	break;
	139	case ACL_GROUP:
	140	entry->e_id = cpu_to_le32(
	141	from_kgid(&init_user_ns,
	142	acl->a_entries[i].e_gid));
	143	entry = (struct f2fs_acl_entry )((char )entry +
	144	sizeof(struct f2fs_acl_entry));
	145	break;
	146	case ACL_USER_OBJ:
	147	case ACL_GROUP_OBJ:
	148	case ACL_MASK:
	149	case ACL_OTHER:
	150	entry = (struct f2fs_acl_entry )((char )entry +
	151	sizeof(struct f2fs_acl_entry_short));
	152	break;
	153	default:
	154	goto fail;
	155	}
	156	}
	157	*size = f2fs_acl_size(acl->a_count);
	158	return (void *)f2fs_acl;
	159
	160	fail:
	161	kfree(f2fs_acl);
	162	return ERR_PTR(-EINVAL);
	163	}
	164
bce8d112 JK	165	static struct posix_acl __f2fs_get_acl(struct inode inode, int type,
bce8d112 JK	166	struct page *dpage)
af48b85b	167	{
af48b85b JK	168	int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	169	void *value = NULL;
	170	struct posix_acl *acl;
	171	int retval;
	172
af48b85b JK	173	if (type == ACL_TYPE_ACCESS)
	174	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
	175
bce8d112	176	retval = f2fs_getxattr(inode, name_index, "", NULL, 0, dpage);
af48b85b	177	if (retval > 0) {
808a1d74	178	value = kmalloc(retval, GFP_F2FS_ZERO);
af48b85b JK	179	if (!value)
af48b85b JK	180	return ERR_PTR(-ENOMEM);
bce8d112 JK	181	retval = f2fs_getxattr(inode, name_index, "", value,
bce8d112 JK	182	retval, dpage);
af48b85b JK	183	}
af48b85b JK	184
c1b75eab	185	if (retval > 0)
af48b85b	186	acl = f2fs_acl_from_disk(value, retval);
c1b75eab JK	187	else if (retval == -ENODATA)
	188	acl = NULL;
	189	else
	190	acl = ERR_PTR(retval);
af48b85b	191	kfree(value);
c1b75eab	192
af48b85b JK	193	return acl;
	194	}
	195
bce8d112 JK	196	struct posix_acl f2fs_get_acl(struct inode inode, int type)
	197	{
	198	return __f2fs_get_acl(inode, type, NULL);
	199	}
	200
a6dda0e6	201	static int __f2fs_set_acl(struct inode *inode, int type,
2ed2d5b3	202	struct posix_acl acl, struct page ipage)
af48b85b	203	{
af48b85b JK	204	struct f2fs_inode_info *fi = F2FS_I(inode);
	205	int name_index;
	206	void *value = NULL;
	207	size_t size = 0;
	208	int error;
	209
af48b85b JK	210	switch (type) {
	211	case ACL_TYPE_ACCESS:
	212	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
	213	if (acl) {
	214	error = posix_acl_equiv_mode(acl, &inode->i_mode);
	215	if (error < 0)
	216	return error;
	217	set_acl_inode(fi, inode->i_mode);
	218	if (error == 0)
	219	acl = NULL;
	220	}
	221	break;
	222
	223	case ACL_TYPE_DEFAULT:
	224	name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	225	if (!S_ISDIR(inode->i_mode))
	226	return acl ? -EACCES : 0;
	227	break;
	228
	229	default:
	230	return -EINVAL;
	231	}
	232
	233	if (acl) {
	234	value = f2fs_acl_to_disk(acl, &size);
	235	if (IS_ERR(value)) {
fa528722	236	clear_inode_flag(fi, FI_ACL_MODE);
af48b85b JK	237	return (int)PTR_ERR(value);
	238	}
	239	}
	240
c02745ef	241	error = f2fs_setxattr(inode, name_index, "", value, size, ipage, 0);
af48b85b JK	242
	243	kfree(value);
	244	if (!error)
	245	set_cached_acl(inode, type, acl);
	246
fa528722	247	clear_inode_flag(fi, FI_ACL_MODE);
af48b85b JK	248	return error;
	249	}
	250
a6dda0e6	251	int f2fs_set_acl(struct inode inode, struct posix_acl acl, int type)
af48b85b	252	{
a6dda0e6	253	return __f2fs_set_acl(inode, type, acl, NULL);
af48b85b JK	254	}
af48b85b JK	255
bce8d112 JK	256	/*
	257	* Most part of f2fs_acl_clone, f2fs_acl_create_masq, f2fs_acl_create
	258	* are copied from posix_acl.c
	259	*/
	260	static struct posix_acl f2fs_acl_clone(const struct posix_acl acl,
	261	gfp_t flags)
	262	{
	263	struct posix_acl *clone = NULL;
	264
	265	if (acl) {
	266	int size = sizeof(struct posix_acl) + acl->a_count *
	267	sizeof(struct posix_acl_entry);
	268	clone = kmemdup(acl, size, flags);
	269	if (clone)
	270	atomic_set(&clone->a_refcount, 1);
	271	}
	272	return clone;
	273	}
	274
	275	static int f2fs_acl_create_masq(struct posix_acl acl, umode_t mode_p)
	276	{
	277	struct posix_acl_entry pa, pe;
	278	struct posix_acl_entry group_obj = NULL, mask_obj = NULL;
	279	umode_t mode = *mode_p;
	280	int not_equiv = 0;
	281
	282	/* assert(atomic_read(acl->a_refcount) == 1); */
	283
	284	FOREACH_ACL_ENTRY(pa, acl, pe) {
	285	switch(pa->e_tag) {
	286	case ACL_USER_OBJ:
	287	pa->e_perm &= (mode >> 6) \| ~S_IRWXO;
	288	mode &= (pa->e_perm << 6) \| ~S_IRWXU;
	289	break;
	290
	291	case ACL_USER:
	292	case ACL_GROUP:
	293	not_equiv = 1;
	294	break;
	295
	296	case ACL_GROUP_OBJ:
	297	group_obj = pa;
	298	break;
	299
	300	case ACL_OTHER:
	301	pa->e_perm &= mode \| ~S_IRWXO;
	302	mode &= pa->e_perm \| ~S_IRWXO;
	303	break;
	304
	305	case ACL_MASK:
	306	mask_obj = pa;
	307	not_equiv = 1;
	308	break;
	309
	310	default:
	311	return -EIO;
	312	}
	313	}
	314
	315	if (mask_obj) {
	316	mask_obj->e_perm &= (mode >> 3) \| ~S_IRWXO;
	317	mode &= (mask_obj->e_perm << 3) \| ~S_IRWXG;
	318	} else {
	319	if (!group_obj)
320	return -EIO;
321	group_obj->e_perm &= (mode >> 3) \| ~S_IRWXO;
322	mode &= (group_obj->e_perm << 3) \| ~S_IRWXG;
323	}
324
325	mode_p = (mode_p & ~S_IRWXUGO) \| mode;
326	return not_equiv;
327	}
328
329	static int f2fs_acl_create(struct inode dir, umode_t mode,
330	struct posix_acl default_acl, struct posix_acl acl,
331	struct page *dpage)
332	{
333	struct posix_acl *p;
272e083f	334	struct posix_acl *clone;
bce8d112 JK	335	int ret;
bce8d112 JK	336
272e083f CY	337	*acl = NULL;
	338	*default_acl = NULL;
	339
bce8d112	340	if (S_ISLNK(*mode) \|\| !IS_POSIXACL(dir))
272e083f	341	return 0;
bce8d112 JK	342
bce8d112 JK	343	p = __f2fs_get_acl(dir, ACL_TYPE_DEFAULT, dpage);
272e083f CY	344	if (!p \|\| p == ERR_PTR(-EOPNOTSUPP)) {
	345	*mode &= ~current_umask();
	346	return 0;
bce8d112	347	}
272e083f CY	348	if (IS_ERR(p))
272e083f CY	349	return PTR_ERR(p);
bce8d112	350
272e083f CY	351	clone = f2fs_acl_clone(p, GFP_NOFS);
272e083f CY	352	if (!clone)
83dfe53c	353	goto no_mem;
bce8d112	354
272e083f	355	ret = f2fs_acl_create_masq(clone, mode);
83dfe53c CY	356	if (ret < 0)
83dfe53c CY	357	goto no_mem_clone;
bce8d112	358
272e083f CY	359	if (ret == 0)
	360	posix_acl_release(clone);
	361	else
	362	*acl = clone;
bce8d112	363
272e083f	364	if (!S_ISDIR(*mode))
bce8d112	365	posix_acl_release(p);
272e083f	366	else
bce8d112	367	*default_acl = p;
bce8d112	368
bce8d112	369	return 0;
83dfe53c CY	370
83dfe53c CY	371	no_mem_clone:
272e083f	372	posix_acl_release(clone);
83dfe53c CY	373	no_mem:
	374	posix_acl_release(p);
	375	return -ENOMEM;
bce8d112 JK	376	}
	377
	378	int f2fs_init_acl(struct inode inode, struct inode dir, struct page *ipage,
	379	struct page *dpage)
af48b85b	380	{
bce8d112	381	struct posix_acl default_acl = NULL, acl = NULL;
a6dda0e6	382	int error = 0;
af48b85b	383
bce8d112	384	error = f2fs_acl_create(dir, &inode->i_mode, &default_acl, &acl, dpage);
af48b85b JK	385	if (error)
af48b85b JK	386	return error;
b8b60e1a	387
a6dda0e6 CH	388	if (default_acl) {
	389	error = __f2fs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl,
	390	ipage);
	391	posix_acl_release(default_acl);
	392	}
	393	if (acl) {
3b6709b7	394	if (!error)
a6dda0e6 CH	395	error = __f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl,
	396	ipage);
	397	posix_acl_release(acl);
af48b85b JK	398	}
af48b85b JK	399
af48b85b JK	400	return error;
af48b85b JK	401	}