[linux.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, <[email protected]>
 *
 * 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"

#define get_inode_mode(i)	((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
					(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))

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_KERNEL);
	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_KERNEL);
	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);
}

struct posix_acl *f2fs_get_acl(struct inode *inode, int type)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	void *value = NULL;
	struct posix_acl *acl;
	int retval;

	if (!test_opt(sbi, POSIX_ACL))
		return NULL;

	acl = get_cached_acl(inode, type);
	if (acl != ACL_NOT_CACHED)
		return acl;

	if (type == ACL_TYPE_ACCESS)
		name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;

	retval = f2fs_getxattr(inode, name_index, "", NULL, 0);
	if (retval > 0) {
		value = kmalloc(retval, GFP_KERNEL);
		if (!value)
			return ERR_PTR(-ENOMEM);
		retval = f2fs_getxattr(inode, name_index, "", value, retval);
	}

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

	if (!IS_ERR(acl))
		set_cached_acl(inode, type, acl);

	return acl;
}

static int f2fs_set_acl(struct inode *inode, int type,
			struct posix_acl *acl, struct page *ipage)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	int name_index;
	void *value = NULL;
	size_t size = 0;
	int error;

	if (!test_opt(sbi, POSIX_ACL))
		return 0;
	if (S_ISLNK(inode->i_mode))
		return -EOPNOTSUPP;

	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)) {
			cond_clear_inode_flag(fi, FI_ACL_MODE);
			return (int)PTR_ERR(value);
		}
	}

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

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

	cond_clear_inode_flag(fi, FI_ACL_MODE);
	return error;
}

int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage)
{
	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
	struct posix_acl *acl = NULL;
	int error = 0;

	if (!S_ISLNK(inode->i_mode)) {
		if (test_opt(sbi, POSIX_ACL)) {
			acl = f2fs_get_acl(dir, ACL_TYPE_DEFAULT);
			if (IS_ERR(acl))
				return PTR_ERR(acl);
		}
		if (!acl)
			inode->i_mode &= ~current_umask();
	}

	if (!test_opt(sbi, POSIX_ACL) || !acl)
		goto cleanup;

	if (S_ISDIR(inode->i_mode)) {
		error = f2fs_set_acl(inode, ACL_TYPE_DEFAULT, acl, ipage);
		if (error)
			goto cleanup;
	}
	error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
	if (error < 0)
		return error;
	if (error > 0)
		error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl, ipage);
cleanup:
	posix_acl_release(acl);
	return error;
}

int f2fs_acl_chmod(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct posix_acl *acl;
	int error;
	umode_t mode = get_inode_mode(inode);

	if (!test_opt(sbi, POSIX_ACL))
		return 0;
	if (S_ISLNK(mode))
		return -EOPNOTSUPP;

	acl = f2fs_get_acl(inode, ACL_TYPE_ACCESS);
	if (IS_ERR(acl) || !acl)
		return PTR_ERR(acl);

	error = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
	if (error)
		return error;

	error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl, NULL);
	posix_acl_release(acl);
	return error;
}

static size_t f2fs_xattr_list_acl(struct dentry *dentry, char *list,
		size_t list_size, const char *name, size_t name_len, int type)
{
	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	const char *xname = POSIX_ACL_XATTR_DEFAULT;
	size_t size;

	if (!test_opt(sbi, POSIX_ACL))
		return 0;

	if (type == ACL_TYPE_ACCESS)
		xname = POSIX_ACL_XATTR_ACCESS;

	size = strlen(xname) + 1;
	if (list && size <= list_size)
		memcpy(list, xname, size);
	return size;
}

static int f2fs_xattr_get_acl(struct dentry *dentry, const char *name,
		void *buffer, size_t size, int type)
{
	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	struct posix_acl *acl;
	int error;

	if (strcmp(name, "") != 0)
		return -EINVAL;
	if (!test_opt(sbi, POSIX_ACL))
		return -EOPNOTSUPP;

	acl = f2fs_get_acl(dentry->d_inode, type);
	if (IS_ERR(acl))
		return PTR_ERR(acl);
	if (!acl)
		return -ENODATA;
	error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
	posix_acl_release(acl);

	return error;
}

static int f2fs_xattr_set_acl(struct dentry *dentry, const char *name,
		const void *value, size_t size, int flags, int type)
{
	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	struct inode *inode = dentry->d_inode;
	struct posix_acl *acl = NULL;
	int error;

	if (strcmp(name, "") != 0)
		return -EINVAL;
	if (!test_opt(sbi, POSIX_ACL))
		return -EOPNOTSUPP;
	if (!inode_owner_or_capable(inode))
		return -EPERM;

	if (value) {
		acl = posix_acl_from_xattr(&init_user_ns, value, size);
		if (IS_ERR(acl))
			return PTR_ERR(acl);
		if (acl) {
			error = posix_acl_valid(acl);
			if (error)
				goto release_and_out;
		}
	} else {
		acl = NULL;
	}

	error = f2fs_set_acl(inode, type, acl, NULL);

release_and_out:
	posix_acl_release(acl);
	return error;
}

const struct xattr_handler f2fs_xattr_acl_default_handler = {
	.prefix = POSIX_ACL_XATTR_DEFAULT,
	.flags = ACL_TYPE_DEFAULT,
	.list = f2fs_xattr_list_acl,
	.get = f2fs_xattr_get_acl,
	.set = f2fs_xattr_set_acl,
};

const struct xattr_handler f2fs_xattr_acl_access_handler = {
	.prefix = POSIX_ACL_XATTR_ACCESS,
	.flags = ACL_TYPE_ACCESS,
	.list = f2fs_xattr_list_acl,
	.get = f2fs_xattr_get_acl,
	.set = f2fs_xattr_set_acl,
};
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, <[email protected]>
	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
	20	#define get_inode_mode(i) ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
	21	(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
	22
	23	static inline size_t f2fs_acl_size(int count)
	24	{
	25	if (count <= 4) {
	26	return sizeof(struct f2fs_acl_header) +
	27	count * sizeof(struct f2fs_acl_entry_short);
	28	} else {
	29	return sizeof(struct f2fs_acl_header) +
	30	4 * sizeof(struct f2fs_acl_entry_short) +
	31	(count - 4) * sizeof(struct f2fs_acl_entry);
	32	}
	33	}
	34
	35	static inline int f2fs_acl_count(size_t size)
	36	{
	37	ssize_t s;
	38	size -= sizeof(struct f2fs_acl_header);
	39	s = size - 4 * sizeof(struct f2fs_acl_entry_short);
	40	if (s < 0) {
	41	if (size % sizeof(struct f2fs_acl_entry_short))
	42	return -1;
	43	return size / sizeof(struct f2fs_acl_entry_short);
	44	} else {
	45	if (s % sizeof(struct f2fs_acl_entry))
	46	return -1;
	47	return s / sizeof(struct f2fs_acl_entry) + 4;
	48	}
	49	}
	50
	51	static struct posix_acl f2fs_acl_from_disk(const char value, size_t size)
	52	{
	53	int i, count;
	54	struct posix_acl *acl;
	55	struct f2fs_acl_header hdr = (struct f2fs_acl_header )value;
	56	struct f2fs_acl_entry entry = (struct f2fs_acl_entry )(hdr + 1);
	57	const char *end = value + size;
	58
	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
68	acl = posix_acl_alloc(count, GFP_KERNEL);
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
	115	static void f2fs_acl_to_disk(const struct posix_acl acl, size_t *size)
	116	{
	117	struct f2fs_acl_header *f2fs_acl;
	118	struct f2fs_acl_entry *entry;
	119	int i;
	120
	121	f2fs_acl = kmalloc(sizeof(struct f2fs_acl_header) + acl->a_count *
	122	sizeof(struct f2fs_acl_entry), GFP_KERNEL);
	123	if (!f2fs_acl)
	124	return ERR_PTR(-ENOMEM);
	125
	126	f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION);
	127	entry = (struct f2fs_acl_entry *)(f2fs_acl + 1);
	128
	129	for (i = 0; i < acl->a_count; i++) {
	130
	131	entry->e_tag = cpu_to_le16(acl->a_entries[i].e_tag);
	132	entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm);
	133
	134	switch (acl->a_entries[i].e_tag) {
	135	case ACL_USER:
	136	entry->e_id = cpu_to_le32(
	137	from_kuid(&init_user_ns,
	138	acl->a_entries[i].e_uid));
	139	entry = (struct f2fs_acl_entry )((char )entry +
	140	sizeof(struct f2fs_acl_entry));
	141	break;
	142	case ACL_GROUP:
	143	entry->e_id = cpu_to_le32(
	144	from_kgid(&init_user_ns,
	145	acl->a_entries[i].e_gid));
	146	entry = (struct f2fs_acl_entry )((char )entry +
	147	sizeof(struct f2fs_acl_entry));
	148	break;
149	case ACL_USER_OBJ:
150	case ACL_GROUP_OBJ:
151	case ACL_MASK:
152	case ACL_OTHER:
153	entry = (struct f2fs_acl_entry )((char )entry +
154	sizeof(struct f2fs_acl_entry_short));
155	break;
156	default:
157	goto fail;
158	}
159	}
160	*size = f2fs_acl_size(acl->a_count);
161	return (void *)f2fs_acl;
162
163	fail:
164	kfree(f2fs_acl);
165	return ERR_PTR(-EINVAL);
166	}
167
168	struct posix_acl f2fs_get_acl(struct inode inode, int type)
169	{
170	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
171	int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
172	void *value = NULL;
173	struct posix_acl *acl;
174	int retval;
175
176	if (!test_opt(sbi, POSIX_ACL))
177	return NULL;
178
179	acl = get_cached_acl(inode, type);
180	if (acl != ACL_NOT_CACHED)
181	return acl;
182
183	if (type == ACL_TYPE_ACCESS)
184	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
185
186	retval = f2fs_getxattr(inode, name_index, "", NULL, 0);
187	if (retval > 0) {
188	value = kmalloc(retval, GFP_KERNEL);
189	if (!value)
190	return ERR_PTR(-ENOMEM);
191	retval = f2fs_getxattr(inode, name_index, "", value, retval);
192	}
193
c1b75eab	194	if (retval > 0)
af48b85b	195	acl = f2fs_acl_from_disk(value, retval);
c1b75eab JK	196	else if (retval == -ENODATA)
	197	acl = NULL;
	198	else
	199	acl = ERR_PTR(retval);
af48b85b	200	kfree(value);
c1b75eab	201
af48b85b JK	202	if (!IS_ERR(acl))
	203	set_cached_acl(inode, type, acl);
	204
	205	return acl;
	206	}
	207
2ed2d5b3 JK	208	static int f2fs_set_acl(struct inode *inode, int type,
2ed2d5b3 JK	209	struct posix_acl acl, struct page ipage)
af48b85b JK	210	{
	211	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	212	struct f2fs_inode_info *fi = F2FS_I(inode);
	213	int name_index;
	214	void *value = NULL;
	215	size_t size = 0;
	216	int error;
	217
	218	if (!test_opt(sbi, POSIX_ACL))
	219	return 0;
	220	if (S_ISLNK(inode->i_mode))
	221	return -EOPNOTSUPP;
	222
	223	switch (type) {
	224	case ACL_TYPE_ACCESS:
	225	name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
	226	if (acl) {
	227	error = posix_acl_equiv_mode(acl, &inode->i_mode);
	228	if (error < 0)
	229	return error;
	230	set_acl_inode(fi, inode->i_mode);
	231	if (error == 0)
	232	acl = NULL;
	233	}
	234	break;
	235
	236	case ACL_TYPE_DEFAULT:
	237	name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
	238	if (!S_ISDIR(inode->i_mode))
	239	return acl ? -EACCES : 0;
	240	break;
	241
	242	default:
	243	return -EINVAL;
	244	}
	245
	246	if (acl) {
	247	value = f2fs_acl_to_disk(acl, &size);
	248	if (IS_ERR(value)) {
	249	cond_clear_inode_flag(fi, FI_ACL_MODE);
	250	return (int)PTR_ERR(value);
	251	}
	252	}
	253
2ed2d5b3	254	error = f2fs_setxattr(inode, name_index, "", value, size, ipage);
af48b85b JK	255
	256	kfree(value);
	257	if (!error)
	258	set_cached_acl(inode, type, acl);
	259
	260	cond_clear_inode_flag(fi, FI_ACL_MODE);
	261	return error;
	262	}
	263
2ed2d5b3	264	int f2fs_init_acl(struct inode inode, struct inode dir, struct page *ipage)
af48b85b	265	{
af48b85b	266	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
b8b60e1a	267	struct posix_acl *acl = NULL;
af48b85b JK	268	int error = 0;
	269
	270	if (!S_ISLNK(inode->i_mode)) {
	271	if (test_opt(sbi, POSIX_ACL)) {
	272	acl = f2fs_get_acl(dir, ACL_TYPE_DEFAULT);
	273	if (IS_ERR(acl))
	274	return PTR_ERR(acl);
	275	}
	276	if (!acl)
	277	inode->i_mode &= ~current_umask();
	278	}
	279
b8b60e1a JK	280	if (!test_opt(sbi, POSIX_ACL) \|\| !acl)
b8b60e1a JK	281	goto cleanup;
af48b85b	282
b8b60e1a	283	if (S_ISDIR(inode->i_mode)) {
2ed2d5b3	284	error = f2fs_set_acl(inode, ACL_TYPE_DEFAULT, acl, ipage);
b8b60e1a JK	285	if (error)
b8b60e1a JK	286	goto cleanup;
af48b85b	287	}
37bc1539	288	error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
b8b60e1a JK	289	if (error < 0)
	290	return error;
	291	if (error > 0)
2ed2d5b3	292	error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl, ipage);
af48b85b JK	293	cleanup:
	294	posix_acl_release(acl);
	295	return error;
	296	}
	297
	298	int f2fs_acl_chmod(struct inode *inode)
	299	{
	300	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	301	struct posix_acl *acl;
	302	int error;
0ecc833b	303	umode_t mode = get_inode_mode(inode);
af48b85b JK	304
	305	if (!test_opt(sbi, POSIX_ACL))
	306	return 0;
	307	if (S_ISLNK(mode))
	308	return -EOPNOTSUPP;
	309
	310	acl = f2fs_get_acl(inode, ACL_TYPE_ACCESS);
	311	if (IS_ERR(acl) \|\| !acl)
	312	return PTR_ERR(acl);
	313
5bf3258f	314	error = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
af48b85b JK	315	if (error)
af48b85b JK	316	return error;
b8b60e1a	317
2ed2d5b3	318	error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl, NULL);
af48b85b JK	319	posix_acl_release(acl);
	320	return error;
	321	}
	322
	323	static size_t f2fs_xattr_list_acl(struct dentry dentry, char list,
	324	size_t list_size, const char *name, size_t name_len, int type)
	325	{
	326	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	327	const char *xname = POSIX_ACL_XATTR_DEFAULT;
	328	size_t size;
	329
	330	if (!test_opt(sbi, POSIX_ACL))
	331	return 0;
	332
	333	if (type == ACL_TYPE_ACCESS)
	334	xname = POSIX_ACL_XATTR_ACCESS;
	335
	336	size = strlen(xname) + 1;
	337	if (list && size <= list_size)
	338	memcpy(list, xname, size);
	339	return size;
	340	}
	341
	342	static int f2fs_xattr_get_acl(struct dentry dentry, const char name,
	343	void *buffer, size_t size, int type)
	344	{
	345	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	346	struct posix_acl *acl;
	347	int error;
	348
	349	if (strcmp(name, "") != 0)
	350	return -EINVAL;
	351	if (!test_opt(sbi, POSIX_ACL))
	352	return -EOPNOTSUPP;
	353
	354	acl = f2fs_get_acl(dentry->d_inode, type);
	355	if (IS_ERR(acl))
	356	return PTR_ERR(acl);
	357	if (!acl)
	358	return -ENODATA;
	359	error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
	360	posix_acl_release(acl);
	361
	362	return error;
	363	}
	364
	365	static int f2fs_xattr_set_acl(struct dentry dentry, const char name,
	366	const void *value, size_t size, int flags, int type)
	367	{
	368	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	369	struct inode *inode = dentry->d_inode;
	370	struct posix_acl *acl = NULL;
	371	int error;
	372
	373	if (strcmp(name, "") != 0)
	374	return -EINVAL;
	375	if (!test_opt(sbi, POSIX_ACL))
	376	return -EOPNOTSUPP;
	377	if (!inode_owner_or_capable(inode))
	378	return -EPERM;
	379
	380	if (value) {
	381	acl = posix_acl_from_xattr(&init_user_ns, value, size);
	382	if (IS_ERR(acl))
383	return PTR_ERR(acl);
384	if (acl) {
385	error = posix_acl_valid(acl);
386	if (error)
387	goto release_and_out;
388	}
389	} else {
390	acl = NULL;
391	}
392
2ed2d5b3	393	error = f2fs_set_acl(inode, type, acl, NULL);
af48b85b JK	394
	395	release_and_out:
	396	posix_acl_release(acl);
	397	return error;
	398	}
	399
	400	const struct xattr_handler f2fs_xattr_acl_default_handler = {
	401	.prefix = POSIX_ACL_XATTR_DEFAULT,
	402	.flags = ACL_TYPE_DEFAULT,
	403	.list = f2fs_xattr_list_acl,
	404	.get = f2fs_xattr_get_acl,
	405	.set = f2fs_xattr_set_acl,
	406	};
	407
	408	const struct xattr_handler f2fs_xattr_acl_access_handler = {
	409	.prefix = POSIX_ACL_XATTR_ACCESS,
	410	.flags = ACL_TYPE_ACCESS,
	411	.list = f2fs_xattr_list_acl,
	412	.get = f2fs_xattr_get_acl,
	413	.set = f2fs_xattr_set_acl,
	414	};