[linux-2.6-block.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 (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(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 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)
		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;

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