[linux.git] / fs / f2fs / xattr.c

/*
 * fs/f2fs/xattr.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * Portions of this code from linux/fs/ext2/xattr.c
 *
 * Copyright (C) 2001-2003 Andreas Gruenbacher <[email protected]>
 *
 * Fix by Harrison Xing <[email protected]>.
 * Extended attributes for symlinks and special files added per
 *  suggestion of Luka Renko <[email protected]>.
 * xattr consolidation Copyright (c) 2004 James Morris <[email protected]>,
 *  Red Hat Inc.
 *
 * 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/rwsem.h>
#include <linux/f2fs_fs.h>
#include <linux/security.h>
#include <linux/posix_acl_xattr.h>
#include "f2fs.h"
#include "xattr.h"

static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
		struct dentry *unused, struct inode *inode,
		const char *name, void *buffer, size_t size)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);

	switch (handler->flags) {
	case F2FS_XATTR_INDEX_USER:
		if (!test_opt(sbi, XATTR_USER))
			return -EOPNOTSUPP;
		break;
	case F2FS_XATTR_INDEX_TRUSTED:
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		break;
	case F2FS_XATTR_INDEX_SECURITY:
		break;
	default:
		return -EINVAL;
	}
	return f2fs_getxattr(inode, handler->flags, name,
			     buffer, size, NULL);
}

static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
		struct dentry *unused, struct inode *inode,
		const char *name, const void *value,
		size_t size, int flags)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);

	switch (handler->flags) {
	case F2FS_XATTR_INDEX_USER:
		if (!test_opt(sbi, XATTR_USER))
			return -EOPNOTSUPP;
		break;
	case F2FS_XATTR_INDEX_TRUSTED:
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		break;
	case F2FS_XATTR_INDEX_SECURITY:
		break;
	default:
		return -EINVAL;
	}
	return f2fs_setxattr(inode, handler->flags, name,
					value, size, NULL, flags);
}

static bool f2fs_xattr_user_list(struct dentry *dentry)
{
	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);

	return test_opt(sbi, XATTR_USER);
}

static bool f2fs_xattr_trusted_list(struct dentry *dentry)
{
	return capable(CAP_SYS_ADMIN);
}

static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
		struct dentry *unused, struct inode *inode,
		const char *name, void *buffer, size_t size)
{
	if (buffer)
		*((char *)buffer) = F2FS_I(inode)->i_advise;
	return sizeof(char);
}

static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
		struct dentry *unused, struct inode *inode,
		const char *name, const void *value,
		size_t size, int flags)
{
	if (!inode_owner_or_capable(inode))
		return -EPERM;
	if (value == NULL)
		return -EINVAL;

	F2FS_I(inode)->i_advise |= *(char *)value;
	f2fs_mark_inode_dirty_sync(inode, true);
	return 0;
}

#ifdef CONFIG_F2FS_FS_SECURITY
static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
		void *page)
{
	const struct xattr *xattr;
	int err = 0;

	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
		err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
				xattr->name, xattr->value,
				xattr->value_len, (struct page *)page, 0);
		if (err < 0)
			break;
	}
	return err;
}

int f2fs_init_security(struct inode *inode, struct inode *dir,
				const struct qstr *qstr, struct page *ipage)
{
	return security_inode_init_security(inode, dir, qstr,
				&f2fs_initxattrs, ipage);
}
#endif

const struct xattr_handler f2fs_xattr_user_handler = {
	.prefix	= XATTR_USER_PREFIX,
	.flags	= F2FS_XATTR_INDEX_USER,
	.list	= f2fs_xattr_user_list,
	.get	= f2fs_xattr_generic_get,
	.set	= f2fs_xattr_generic_set,
};

const struct xattr_handler f2fs_xattr_trusted_handler = {
	.prefix	= XATTR_TRUSTED_PREFIX,
	.flags	= F2FS_XATTR_INDEX_TRUSTED,
	.list	= f2fs_xattr_trusted_list,
	.get	= f2fs_xattr_generic_get,
	.set	= f2fs_xattr_generic_set,
};

const struct xattr_handler f2fs_xattr_advise_handler = {
	.name	= F2FS_SYSTEM_ADVISE_NAME,
	.flags	= F2FS_XATTR_INDEX_ADVISE,
	.get    = f2fs_xattr_advise_get,
	.set    = f2fs_xattr_advise_set,
};

const struct xattr_handler f2fs_xattr_security_handler = {
	.prefix	= XATTR_SECURITY_PREFIX,
	.flags	= F2FS_XATTR_INDEX_SECURITY,
	.get	= f2fs_xattr_generic_get,
	.set	= f2fs_xattr_generic_set,
};

static const struct xattr_handler *f2fs_xattr_handler_map[] = {
	[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
#ifdef CONFIG_F2FS_FS_POSIX_ACL
	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
#endif
	[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
#ifdef CONFIG_F2FS_FS_SECURITY
	[F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
#endif
	[F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
};

const struct xattr_handler *f2fs_xattr_handlers[] = {
	&f2fs_xattr_user_handler,
#ifdef CONFIG_F2FS_FS_POSIX_ACL
	&posix_acl_access_xattr_handler,
	&posix_acl_default_xattr_handler,
#endif
	&f2fs_xattr_trusted_handler,
#ifdef CONFIG_F2FS_FS_SECURITY
	&f2fs_xattr_security_handler,
#endif
	&f2fs_xattr_advise_handler,
	NULL,
};

static inline const struct xattr_handler *f2fs_xattr_handler(int index)
{
	const struct xattr_handler *handler = NULL;

	if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
		handler = f2fs_xattr_handler_map[index];
	return handler;
}

static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index,
					size_t len, const char *name)
{
	struct f2fs_xattr_entry *entry;

	list_for_each_xattr(entry, base_addr) {
		if (entry->e_name_index != index)
			continue;
		if (entry->e_name_len != len)
			continue;
		if (!memcmp(entry->e_name, name, len))
			break;
	}
	return entry;
}

static struct f2fs_xattr_entry *__find_inline_xattr(void *base_addr,
					void **last_addr, int index,
					size_t len, const char *name)
{
	struct f2fs_xattr_entry *entry;
	unsigned int inline_size = F2FS_INLINE_XATTR_ADDRS << 2;

	list_for_each_xattr(entry, base_addr) {
		if ((void *)entry + sizeof(__u32) > base_addr + inline_size ||
			(void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) >
			base_addr + inline_size) {
			*last_addr = entry;
			return NULL;
		}
		if (entry->e_name_index != index)
			continue;
		if (entry->e_name_len != len)
			continue;
		if (!memcmp(entry->e_name, name, len))
			break;
	}
	return entry;
}

static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
				unsigned int index, unsigned int len,
				const char *name, struct f2fs_xattr_entry **xe,
				void **base_addr)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	void *cur_addr, *txattr_addr, *last_addr = NULL;
	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
	unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
	unsigned int inline_size = 0;
	int err = 0;

	inline_size = inline_xattr_size(inode);

	if (!size && !inline_size)
		return -ENODATA;

	txattr_addr = kzalloc(inline_size + size + sizeof(__u32),
							GFP_F2FS_ZERO);
	if (!txattr_addr)
		return -ENOMEM;

	/* read from inline xattr */
	if (inline_size) {
		struct page *page = NULL;
		void *inline_addr;

		if (ipage) {
			inline_addr = inline_xattr_addr(ipage);
		} else {
			page = get_node_page(sbi, inode->i_ino);
			if (IS_ERR(page)) {
				err = PTR_ERR(page);
				goto out;
			}
			inline_addr = inline_xattr_addr(page);
		}
		memcpy(txattr_addr, inline_addr, inline_size);
		f2fs_put_page(page, 1);

		*xe = __find_inline_xattr(txattr_addr, &last_addr,
						index, len, name);
		if (*xe)
			goto check;
	}

	/* read from xattr node block */
	if (xnid) {
		struct page *xpage;
		void *xattr_addr;

		/* The inode already has an extended attribute block. */
		xpage = get_node_page(sbi, xnid);
		if (IS_ERR(xpage)) {
			err = PTR_ERR(xpage);
			goto out;
		}

		xattr_addr = page_address(xpage);
		memcpy(txattr_addr + inline_size, xattr_addr, size);
		f2fs_put_page(xpage, 1);
	}

	if (last_addr)
		cur_addr = XATTR_HDR(last_addr) - 1;
	else
		cur_addr = txattr_addr;

	*xe = __find_xattr(cur_addr, index, len, name);
check:
	if (IS_XATTR_LAST_ENTRY(*xe)) {
		err = -ENODATA;
		goto out;
	}

	*base_addr = txattr_addr;
	return 0;
out:
	kzfree(txattr_addr);
	return err;
}

static int read_all_xattrs(struct inode *inode, struct page *ipage,
							void **base_addr)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct f2fs_xattr_header *header;
	size_t size = PAGE_SIZE, inline_size = 0;
	void *txattr_addr;
	int err;

	inline_size = inline_xattr_size(inode);

	txattr_addr = kzalloc(inline_size + size, GFP_F2FS_ZERO);
	if (!txattr_addr)
		return -ENOMEM;

	/* read from inline xattr */
	if (inline_size) {
		struct page *page = NULL;
		void *inline_addr;

		if (ipage) {
			inline_addr = inline_xattr_addr(ipage);
		} else {
			page = get_node_page(sbi, inode->i_ino);
			if (IS_ERR(page)) {
				err = PTR_ERR(page);
				goto fail;
			}
			inline_addr = inline_xattr_addr(page);
		}
		memcpy(txattr_addr, inline_addr, inline_size);
		f2fs_put_page(page, 1);
	}

	/* read from xattr node block */
	if (F2FS_I(inode)->i_xattr_nid) {
		struct page *xpage;
		void *xattr_addr;

		/* The inode already has an extended attribute block. */
		xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
		if (IS_ERR(xpage)) {
			err = PTR_ERR(xpage);
			goto fail;
		}

		xattr_addr = page_address(xpage);
		memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE);
		f2fs_put_page(xpage, 1);
	}

	header = XATTR_HDR(txattr_addr);

	/* never been allocated xattrs */
	if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
		header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
		header->h_refcount = cpu_to_le32(1);
	}
	*base_addr = txattr_addr;
	return 0;
fail:
	kzfree(txattr_addr);
	return err;
}

static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
				void *txattr_addr, struct page *ipage)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	size_t inline_size = 0;
	void *xattr_addr;
	struct page *xpage;
	nid_t new_nid = 0;
	int err;

	inline_size = inline_xattr_size(inode);

	if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
		if (!alloc_nid(sbi, &new_nid))
			return -ENOSPC;

	/* write to inline xattr */
	if (inline_size) {
		struct page *page = NULL;
		void *inline_addr;

		if (ipage) {
			inline_addr = inline_xattr_addr(ipage);
			f2fs_wait_on_page_writeback(ipage, NODE, true);
			set_page_dirty(ipage);
		} else {
			page = get_node_page(sbi, inode->i_ino);
			if (IS_ERR(page)) {
				alloc_nid_failed(sbi, new_nid);
				return PTR_ERR(page);
			}
			inline_addr = inline_xattr_addr(page);
			f2fs_wait_on_page_writeback(page, NODE, true);
		}
		memcpy(inline_addr, txattr_addr, inline_size);
		f2fs_put_page(page, 1);

		/* no need to use xattr node block */
		if (hsize <= inline_size) {
			err = truncate_xattr_node(inode, ipage);
			alloc_nid_failed(sbi, new_nid);
			return err;
		}
	}

	/* write to xattr node block */
	if (F2FS_I(inode)->i_xattr_nid) {
		xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
		if (IS_ERR(xpage)) {
			alloc_nid_failed(sbi, new_nid);
			return PTR_ERR(xpage);
		}
		f2fs_bug_on(sbi, new_nid);
		f2fs_wait_on_page_writeback(xpage, NODE, true);
	} else {
		struct dnode_of_data dn;
		set_new_dnode(&dn, inode, NULL, NULL, new_nid);
		xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage);
		if (IS_ERR(xpage)) {
			alloc_nid_failed(sbi, new_nid);
			return PTR_ERR(xpage);
		}
		alloc_nid_done(sbi, new_nid);
	}

	xattr_addr = page_address(xpage);
	memcpy(xattr_addr, txattr_addr + inline_size, MAX_XATTR_BLOCK_SIZE);
	set_page_dirty(xpage);
	f2fs_put_page(xpage, 1);

	return 0;
}

int f2fs_getxattr(struct inode *inode, int index, const char *name,
		void *buffer, size_t buffer_size, struct page *ipage)
{
	struct f2fs_xattr_entry *entry = NULL;
	int error = 0;
	unsigned int size, len;
	char *pval;
	void *base_addr = NULL;

	if (name == NULL)
		return -EINVAL;

	len = strlen(name);
	if (len > F2FS_NAME_LEN)
		return -ERANGE;

	error = lookup_all_xattrs(inode, ipage, index, len, name,
				&entry, &base_addr);
	if (error)
		return error;

	size = le16_to_cpu(entry->e_value_size);

	if (buffer && size > buffer_size) {
		error = -ERANGE;
		goto out;
	}

	pval = entry->e_name + entry->e_name_len;

	if (buffer) {
		char *pval = entry->e_name + entry->e_name_len;
		memcpy(buffer, pval, size);
	}
	error = size;
out:
	kzfree(base_addr);
	return error;
}

ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
	struct inode *inode = d_inode(dentry);
	struct f2fs_xattr_entry *entry;
	void *base_addr;
	int error = 0;
	size_t rest = buffer_size;

	error = read_all_xattrs(inode, NULL, &base_addr);
	if (error)
		return error;

	list_for_each_xattr(entry, base_addr) {
		const struct xattr_handler *handler =
			f2fs_xattr_handler(entry->e_name_index);
		const char *prefix;
		size_t prefix_len;
		size_t size;

		if (!handler || (handler->list && !handler->list(dentry)))
			continue;

		prefix = handler->prefix ?: handler->name;
		prefix_len = strlen(prefix);
		size = prefix_len + entry->e_name_len + 1;
		if (buffer) {
			if (size > rest) {
				error = -ERANGE;
				goto cleanup;
			}
			memcpy(buffer, prefix, prefix_len);
			buffer += prefix_len;
			memcpy(buffer, entry->e_name, entry->e_name_len);
			buffer += entry->e_name_len;
			*buffer++ = 0;
		}
		rest -= size;
	}
	error = buffer_size - rest;
cleanup:
	kzfree(base_addr);
	return error;
}

static int __f2fs_setxattr(struct inode *inode, int index,
			const char *name, const void *value, size_t size,
			struct page *ipage, int flags)
{
	struct f2fs_xattr_entry *here, *last;
	void *base_addr;
	int found, newsize;
	size_t len;
	__u32 new_hsize;
	int error = 0;

	if (name == NULL)
		return -EINVAL;

	if (value == NULL)
		size = 0;

	len = strlen(name);

	if (len > F2FS_NAME_LEN)
		return -ERANGE;

	if (size > MAX_VALUE_LEN(inode))
		return -E2BIG;

	error = read_all_xattrs(inode, ipage, &base_addr);
	if (error)
		return error;

	/* find entry with wanted name. */
	here = __find_xattr(base_addr, index, len, name);

	found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;

	if ((flags & XATTR_REPLACE) && !found) {
		error = -ENODATA;
		goto exit;
	} else if ((flags & XATTR_CREATE) && found) {
		error = -EEXIST;
		goto exit;
	}

	last = here;
	while (!IS_XATTR_LAST_ENTRY(last))
		last = XATTR_NEXT_ENTRY(last);

	newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);

	/* 1. Check space */
	if (value) {
		int free;
		/*
		 * If value is NULL, it is remove operation.
		 * In case of update operation, we calculate free.
		 */
		free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
		if (found)
			free = free + ENTRY_SIZE(here);

		if (unlikely(free < newsize)) {
			error = -E2BIG;
			goto exit;
		}
	}

	/* 2. Remove old entry */
	if (found) {
		/*
		 * If entry is found, remove old entry.
		 * If not found, remove operation is not needed.
		 */
		struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
		int oldsize = ENTRY_SIZE(here);

		memmove(here, next, (char *)last - (char *)next);
		last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
		memset(last, 0, oldsize);
	}

	new_hsize = (char *)last - (char *)base_addr;

	/* 3. Write new entry */
	if (value) {
		char *pval;
		/*
		 * Before we come here, old entry is removed.
		 * We just write new entry.
		 */
		last->e_name_index = index;
		last->e_name_len = len;
		memcpy(last->e_name, name, len);
		pval = last->e_name + len;
		memcpy(pval, value, size);
		last->e_value_size = cpu_to_le16(size);
		new_hsize += newsize;
	}

	error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
	if (error)
		goto exit;

	if (is_inode_flag_set(inode, FI_ACL_MODE)) {
		inode->i_mode = F2FS_I(inode)->i_acl_mode;
		inode->i_ctime = current_time(inode);
		clear_inode_flag(inode, FI_ACL_MODE);
	}
	if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
			!strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
		f2fs_set_encrypted_inode(inode);
	f2fs_mark_inode_dirty_sync(inode, true);
	if (!error && S_ISDIR(inode->i_mode))
		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
exit:
	kzfree(base_addr);
	return error;
}

int f2fs_setxattr(struct inode *inode, int index, const char *name,
				const void *value, size_t size,
				struct page *ipage, int flags)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int err;

	/* this case is only from init_inode_metadata */
	if (ipage)
		return __f2fs_setxattr(inode, index, name, value,
						size, ipage, flags);
	f2fs_balance_fs(sbi, true);

	f2fs_lock_op(sbi);
	/* protect xattr_ver */
	down_write(&F2FS_I(inode)->i_sem);
	err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
	up_write(&F2FS_I(inode)->i_sem);
	f2fs_unlock_op(sbi);

	f2fs_update_time(sbi, REQ_TIME);
	return err;
}
Commit	Line	Data
0a8165d7	1	/*
af48b85b JK	2	* fs/f2fs/xattr.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/xattr.c
	8	*
	9	* Copyright (C) 2001-2003 Andreas Gruenbacher <[email protected]>
	10	*
	11	* Fix by Harrison Xing <[email protected]>.
	12	* Extended attributes for symlinks and special files added per
	13	* suggestion of Luka Renko <[email protected]>.
	14	* xattr consolidation Copyright (c) 2004 James Morris <[email protected]>,
	15	* Red Hat Inc.
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License version 2 as
	19	* published by the Free Software Foundation.
	20	*/
	21	#include <linux/rwsem.h>
	22	#include <linux/f2fs_fs.h>
8ae8f162	23	#include <linux/security.h>
a6dda0e6	24	#include <linux/posix_acl_xattr.h>
af48b85b JK	25	#include "f2fs.h"
	26	#include "xattr.h"
	27
d9a82a04	28	static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
b296821a AV	29	struct dentry unused, struct inode inode,
b296821a AV	30	const char name, void buffer, size_t size)
af48b85b	31	{
b296821a	32	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
af48b85b	33
d9a82a04	34	switch (handler->flags) {
af48b85b JK	35	case F2FS_XATTR_INDEX_USER:
	36	if (!test_opt(sbi, XATTR_USER))
	37	return -EOPNOTSUPP;
	38	break;
	39	case F2FS_XATTR_INDEX_TRUSTED:
	40	if (!capable(CAP_SYS_ADMIN))
	41	return -EPERM;
	42	break;
8ae8f162 JK	43	case F2FS_XATTR_INDEX_SECURITY:
8ae8f162 JK	44	break;
af48b85b JK	45	default:
	46	return -EINVAL;
	47	}
b296821a	48	return f2fs_getxattr(inode, handler->flags, name,
d9a82a04	49	buffer, size, NULL);
af48b85b JK	50	}
af48b85b JK	51
d9a82a04	52	static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
59301226 AV	53	struct dentry unused, struct inode inode,
59301226 AV	54	const char name, const void value,
d9a82a04	55	size_t size, int flags)
af48b85b	56	{
59301226	57	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
af48b85b	58
d9a82a04	59	switch (handler->flags) {
af48b85b JK	60	case F2FS_XATTR_INDEX_USER:
	61	if (!test_opt(sbi, XATTR_USER))
	62	return -EOPNOTSUPP;
	63	break;
	64	case F2FS_XATTR_INDEX_TRUSTED:
	65	if (!capable(CAP_SYS_ADMIN))
	66	return -EPERM;
	67	break;
8ae8f162 JK	68	case F2FS_XATTR_INDEX_SECURITY:
8ae8f162 JK	69	break;
af48b85b JK	70	default:
	71	return -EINVAL;
	72	}
59301226	73	return f2fs_setxattr(inode, handler->flags, name,
c02745ef	74	value, size, NULL, flags);
af48b85b JK	75	}
af48b85b JK	76
764a5c6b	77	static bool f2fs_xattr_user_list(struct dentry *dentry)
573ea5fc	78	{
764a5c6b AG	79	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
	80
	81	return test_opt(sbi, XATTR_USER);
	82	}
573ea5fc	83
764a5c6b AG	84	static bool f2fs_xattr_trusted_list(struct dentry *dentry)
	85	{
	86	return capable(CAP_SYS_ADMIN);
573ea5fc JK	87	}
573ea5fc JK	88
d9a82a04	89	static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
b296821a AV	90	struct dentry unused, struct inode inode,
b296821a AV	91	const char name, void buffer, size_t size)
573ea5fc	92	{
84e97c27 CY	93	if (buffer)
84e97c27 CY	94	((char )buffer) = F2FS_I(inode)->i_advise;
573ea5fc JK	95	return sizeof(char);
	96	}
	97
d9a82a04	98	static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
59301226 AV	99	struct dentry unused, struct inode inode,
59301226 AV	100	const char name, const void value,
d9a82a04	101	size_t size, int flags)
573ea5fc	102	{
573ea5fc JK	103	if (!inode_owner_or_capable(inode))
	104	return -EPERM;
	105	if (value == NULL)
	106	return -EINVAL;
	107
	108	F2FS_I(inode)->i_advise \|= (char )value;
7c45729a	109	f2fs_mark_inode_dirty_sync(inode, true);
573ea5fc JK	110	return 0;
	111	}
	112
8ae8f162 JK	113	#ifdef CONFIG_F2FS_FS_SECURITY
	114	static int f2fs_initxattrs(struct inode inode, const struct xattr xattr_array,
	115	void *page)
	116	{
	117	const struct xattr *xattr;
	118	int err = 0;
	119
	120	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
d631abda	121	err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
8ae8f162	122	xattr->name, xattr->value,
c02745ef	123	xattr->value_len, (struct page *)page, 0);
8ae8f162 JK	124	if (err < 0)
	125	break;
	126	}
	127	return err;
	128	}
	129
	130	int f2fs_init_security(struct inode inode, struct inode dir,
	131	const struct qstr qstr, struct page ipage)
	132	{
	133	return security_inode_init_security(inode, dir, qstr,
	134	&f2fs_initxattrs, ipage);
	135	}
	136	#endif
	137
af48b85b JK	138	const struct xattr_handler f2fs_xattr_user_handler = {
	139	.prefix = XATTR_USER_PREFIX,
	140	.flags = F2FS_XATTR_INDEX_USER,
764a5c6b	141	.list = f2fs_xattr_user_list,
af48b85b JK	142	.get = f2fs_xattr_generic_get,
	143	.set = f2fs_xattr_generic_set,
	144	};
	145
	146	const struct xattr_handler f2fs_xattr_trusted_handler = {
	147	.prefix = XATTR_TRUSTED_PREFIX,
	148	.flags = F2FS_XATTR_INDEX_TRUSTED,
764a5c6b	149	.list = f2fs_xattr_trusted_list,
af48b85b JK	150	.get = f2fs_xattr_generic_get,
	151	.set = f2fs_xattr_generic_set,
	152	};
	153
573ea5fc	154	const struct xattr_handler f2fs_xattr_advise_handler = {
98e9cb57	155	.name = F2FS_SYSTEM_ADVISE_NAME,
573ea5fc	156	.flags = F2FS_XATTR_INDEX_ADVISE,
573ea5fc JK	157	.get = f2fs_xattr_advise_get,
	158	.set = f2fs_xattr_advise_set,
	159	};
	160
8ae8f162 JK	161	const struct xattr_handler f2fs_xattr_security_handler = {
	162	.prefix = XATTR_SECURITY_PREFIX,
	163	.flags = F2FS_XATTR_INDEX_SECURITY,
8ae8f162 JK	164	.get = f2fs_xattr_generic_get,
	165	.set = f2fs_xattr_generic_set,
	166	};
	167
af48b85b JK	168	static const struct xattr_handler *f2fs_xattr_handler_map[] = {
	169	[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
	170	#ifdef CONFIG_F2FS_FS_POSIX_ACL
a6dda0e6 CH	171	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
a6dda0e6 CH	172	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
af48b85b JK	173	#endif
af48b85b JK	174	[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
8ae8f162 JK	175	#ifdef CONFIG_F2FS_FS_SECURITY
	176	[F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
	177	#endif
af48b85b JK	178	[F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
	179	};
	180
	181	const struct xattr_handler *f2fs_xattr_handlers[] = {
	182	&f2fs_xattr_user_handler,
	183	#ifdef CONFIG_F2FS_FS_POSIX_ACL
a6dda0e6 CH	184	&posix_acl_access_xattr_handler,
a6dda0e6 CH	185	&posix_acl_default_xattr_handler,
af48b85b JK	186	#endif
af48b85b JK	187	&f2fs_xattr_trusted_handler,
8ae8f162 JK	188	#ifdef CONFIG_F2FS_FS_SECURITY
	189	&f2fs_xattr_security_handler,
	190	#endif
af48b85b JK	191	&f2fs_xattr_advise_handler,
	192	NULL,
	193	};
	194
e1123268	195	static inline const struct xattr_handler *f2fs_xattr_handler(int index)
af48b85b JK	196	{
	197	const struct xattr_handler *handler = NULL;
	198
e1123268 JK	199	if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
e1123268 JK	200	handler = f2fs_xattr_handler_map[index];
af48b85b JK	201	return handler;
	202	}
	203
e1123268 JK	204	static struct f2fs_xattr_entry __find_xattr(void base_addr, int index,
e1123268 JK	205	size_t len, const char *name)
dd9cfe23 JK	206	{
	207	struct f2fs_xattr_entry *entry;
	208
	209	list_for_each_xattr(entry, base_addr) {
e1123268	210	if (entry->e_name_index != index)
dd9cfe23	211	continue;
e1123268	212	if (entry->e_name_len != len)
dd9cfe23	213	continue;
e1123268	214	if (!memcmp(entry->e_name, name, len))
dd9cfe23 JK	215	break;
	216	}
	217	return entry;
	218	}
	219
ba38c27e CY	220	static struct f2fs_xattr_entry __find_inline_xattr(void base_addr,
	221	void **last_addr, int index,
	222	size_t len, const char *name)
	223	{
	224	struct f2fs_xattr_entry *entry;
	225	unsigned int inline_size = F2FS_INLINE_XATTR_ADDRS << 2;
	226
	227	list_for_each_xattr(entry, base_addr) {
	228	if ((void *)entry + sizeof(__u32) > base_addr + inline_size \|\|
	229	(void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) >
	230	base_addr + inline_size) {
	231	*last_addr = entry;
	232	return NULL;
	233	}
	234	if (entry->e_name_index != index)
	235	continue;
	236	if (entry->e_name_len != len)
	237	continue;
	238	if (!memcmp(entry->e_name, name, len))
	239	break;
	240	}
	241	return entry;
	242	}
	243
	244	static int lookup_all_xattrs(struct inode inode, struct page ipage,
	245	unsigned int index, unsigned int len,
	246	const char name, struct f2fs_xattr_entry *xe,
	247	void **base_addr)
	248	{
	249	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	250	void cur_addr, txattr_addr, *last_addr = NULL;
	251	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
	252	unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
	253	unsigned int inline_size = 0;
	254	int err = 0;
	255
	256	inline_size = inline_xattr_size(inode);
	257
	258	if (!size && !inline_size)
	259	return -ENODATA;
	260
	261	txattr_addr = kzalloc(inline_size + size + sizeof(__u32),
	262	GFP_F2FS_ZERO);
	263	if (!txattr_addr)
	264	return -ENOMEM;
	265
	266	/* read from inline xattr */
	267	if (inline_size) {
	268	struct page *page = NULL;
	269	void *inline_addr;
	270
	271	if (ipage) {
	272	inline_addr = inline_xattr_addr(ipage);
	273	} else {
	274	page = get_node_page(sbi, inode->i_ino);
	275	if (IS_ERR(page)) {
	276	err = PTR_ERR(page);
	277	goto out;
	278	}
	279	inline_addr = inline_xattr_addr(page);
	280	}
	281	memcpy(txattr_addr, inline_addr, inline_size);
	282	f2fs_put_page(page, 1);
	283
284	*xe = __find_inline_xattr(txattr_addr, &last_addr,
285	index, len, name);
286	if (*xe)
287	goto check;
288	}
289
290	/* read from xattr node block */
291	if (xnid) {
292	struct page *xpage;
293	void *xattr_addr;
294
295	/* The inode already has an extended attribute block. */
296	xpage = get_node_page(sbi, xnid);
297	if (IS_ERR(xpage)) {
298	err = PTR_ERR(xpage);
299	goto out;
300	}
301
302	xattr_addr = page_address(xpage);
303	memcpy(txattr_addr + inline_size, xattr_addr, size);
304	f2fs_put_page(xpage, 1);
305	}
306
307	if (last_addr)
308	cur_addr = XATTR_HDR(last_addr) - 1;
309	else
310	cur_addr = txattr_addr;
311
312	*xe = __find_xattr(cur_addr, index, len, name);
313	check:
314	if (IS_XATTR_LAST_ENTRY(*xe)) {
315	err = -ENODATA;
316	goto out;
317	}
318
319	*base_addr = txattr_addr;
320	return 0;
321	out:
322	kzfree(txattr_addr);
323	return err;
324	}
325
86696966 CY	326	static int read_all_xattrs(struct inode inode, struct page ipage,
86696966 CY	327	void **base_addr)
65985d93	328	{
4081363f	329	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
65985d93 JK	330	struct f2fs_xattr_header *header;
	331	size_t size = PAGE_SIZE, inline_size = 0;
	332	void *txattr_addr;
86696966	333	int err;
65985d93 JK	334
	335	inline_size = inline_xattr_size(inode);
	336
808a1d74	337	txattr_addr = kzalloc(inline_size + size, GFP_F2FS_ZERO);
65985d93	338	if (!txattr_addr)
86696966	339	return -ENOMEM;
65985d93 JK	340
	341	/* read from inline xattr */
	342	if (inline_size) {
	343	struct page *page = NULL;
	344	void *inline_addr;
	345
	346	if (ipage) {
	347	inline_addr = inline_xattr_addr(ipage);
	348	} else {
	349	page = get_node_page(sbi, inode->i_ino);
86696966 CY	350	if (IS_ERR(page)) {
86696966 CY	351	err = PTR_ERR(page);
65985d93	352	goto fail;
86696966	353	}
65985d93 JK	354	inline_addr = inline_xattr_addr(page);
	355	}
	356	memcpy(txattr_addr, inline_addr, inline_size);
	357	f2fs_put_page(page, 1);
	358	}
	359
	360	/* read from xattr node block */
	361	if (F2FS_I(inode)->i_xattr_nid) {
	362	struct page *xpage;
	363	void *xattr_addr;
	364
	365	/* The inode already has an extended attribute block. */
	366	xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
86696966 CY	367	if (IS_ERR(xpage)) {
86696966 CY	368	err = PTR_ERR(xpage);
65985d93	369	goto fail;
86696966	370	}
65985d93 JK	371
	372	xattr_addr = page_address(xpage);
	373	memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE);
	374	f2fs_put_page(xpage, 1);
	375	}
	376
	377	header = XATTR_HDR(txattr_addr);
	378
	379	/* never been allocated xattrs */
	380	if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
	381	header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
	382	header->h_refcount = cpu_to_le32(1);
	383	}
86696966 CY	384	*base_addr = txattr_addr;
86696966 CY	385	return 0;
65985d93 JK	386	fail:
65985d93 JK	387	kzfree(txattr_addr);
86696966	388	return err;
65985d93 JK	389	}
	390
	391	static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
	392	void txattr_addr, struct page ipage)
	393	{
4081363f	394	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
65985d93 JK	395	size_t inline_size = 0;
	396	void *xattr_addr;
	397	struct page *xpage;
	398	nid_t new_nid = 0;
	399	int err;
	400
	401	inline_size = inline_xattr_size(inode);
	402
	403	if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
	404	if (!alloc_nid(sbi, &new_nid))
	405	return -ENOSPC;
	406
	407	/* write to inline xattr */
	408	if (inline_size) {
	409	struct page *page = NULL;
	410	void *inline_addr;
	411
	412	if (ipage) {
	413	inline_addr = inline_xattr_addr(ipage);
fec1d657	414	f2fs_wait_on_page_writeback(ipage, NODE, true);
ee6d182f	415	set_page_dirty(ipage);
65985d93 JK	416	} else {
	417	page = get_node_page(sbi, inode->i_ino);
	418	if (IS_ERR(page)) {
	419	alloc_nid_failed(sbi, new_nid);
	420	return PTR_ERR(page);
	421	}
	422	inline_addr = inline_xattr_addr(page);
fec1d657	423	f2fs_wait_on_page_writeback(page, NODE, true);
65985d93 JK	424	}
	425	memcpy(inline_addr, txattr_addr, inline_size);
	426	f2fs_put_page(page, 1);
	427
	428	/* no need to use xattr node block */
	429	if (hsize <= inline_size) {
	430	err = truncate_xattr_node(inode, ipage);
	431	alloc_nid_failed(sbi, new_nid);
	432	return err;
	433	}
	434	}
	435
	436	/* write to xattr node block */
	437	if (F2FS_I(inode)->i_xattr_nid) {
	438	xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
	439	if (IS_ERR(xpage)) {
	440	alloc_nid_failed(sbi, new_nid);
	441	return PTR_ERR(xpage);
	442	}
9850cf4a	443	f2fs_bug_on(sbi, new_nid);
fec1d657	444	f2fs_wait_on_page_writeback(xpage, NODE, true);
65985d93 JK	445	} else {
	446	struct dnode_of_data dn;
	447	set_new_dnode(&dn, inode, NULL, NULL, new_nid);
	448	xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage);
	449	if (IS_ERR(xpage)) {
	450	alloc_nid_failed(sbi, new_nid);
	451	return PTR_ERR(xpage);
	452	}
	453	alloc_nid_done(sbi, new_nid);
	454	}
	455
	456	xattr_addr = page_address(xpage);
ba38c27e	457	memcpy(xattr_addr, txattr_addr + inline_size, MAX_XATTR_BLOCK_SIZE);
65985d93 JK	458	set_page_dirty(xpage);
	459	f2fs_put_page(xpage, 1);
	460
65985d93 JK	461	return 0;
	462	}
	463
e1123268	464	int f2fs_getxattr(struct inode inode, int index, const char name,
bce8d112	465	void buffer, size_t buffer_size, struct page ipage)
af48b85b	466	{
ba38c27e	467	struct f2fs_xattr_entry *entry = NULL;
dd9cfe23	468	int error = 0;
ba38c27e CY	469	unsigned int size, len;
	470	char *pval;
	471	void *base_addr = NULL;
af48b85b JK	472
	473	if (name == NULL)
	474	return -EINVAL;
e1123268 JK	475
	476	len = strlen(name);
	477	if (len > F2FS_NAME_LEN)
6e452d69	478	return -ERANGE;
af48b85b	479
ba38c27e CY	480	error = lookup_all_xattrs(inode, ipage, index, len, name,
ba38c27e CY	481	&entry, &base_addr);
86696966 CY	482	if (error)
86696966 CY	483	return error;
af48b85b	484
e1123268	485	size = le16_to_cpu(entry->e_value_size);
af48b85b	486
e1123268	487	if (buffer && size > buffer_size) {
af48b85b	488	error = -ERANGE;
ba38c27e	489	goto out;
af48b85b JK	490	}
af48b85b JK	491
ba38c27e CY	492	pval = entry->e_name + entry->e_name_len;
ba38c27e CY	493
af48b85b JK	494	if (buffer) {
af48b85b JK	495	char *pval = entry->e_name + entry->e_name_len;
e1123268	496	memcpy(buffer, pval, size);
af48b85b	497	}
e1123268	498	error = size;
ba38c27e	499	out:
65985d93	500	kzfree(base_addr);
af48b85b JK	501	return error;
	502	}
	503
	504	ssize_t f2fs_listxattr(struct dentry dentry, char buffer, size_t buffer_size)
	505	{
2b0143b5	506	struct inode *inode = d_inode(dentry);
af48b85b	507	struct f2fs_xattr_entry *entry;
af48b85b JK	508	void *base_addr;
	509	int error = 0;
	510	size_t rest = buffer_size;
	511
86696966 CY	512	error = read_all_xattrs(inode, NULL, &base_addr);
	513	if (error)
	514	return error;
af48b85b JK	515
	516	list_for_each_xattr(entry, base_addr) {
	517	const struct xattr_handler *handler =
	518	f2fs_xattr_handler(entry->e_name_index);
764a5c6b AG	519	const char *prefix;
764a5c6b AG	520	size_t prefix_len;
af48b85b JK	521	size_t size;
af48b85b JK	522
764a5c6b	523	if (!handler \|\| (handler->list && !handler->list(dentry)))
af48b85b JK	524	continue;
af48b85b JK	525
764a5c6b AG	526	prefix = handler->prefix ?: handler->name;
	527	prefix_len = strlen(prefix);
	528	size = prefix_len + entry->e_name_len + 1;
	529	if (buffer) {
	530	if (size > rest) {
	531	error = -ERANGE;
	532	goto cleanup;
	533	}
	534	memcpy(buffer, prefix, prefix_len);
	535	buffer += prefix_len;
	536	memcpy(buffer, entry->e_name, entry->e_name_len);
	537	buffer += entry->e_name_len;
	538	*buffer++ = 0;
af48b85b	539	}
af48b85b JK	540	rest -= size;
	541	}
	542	error = buffer_size - rest;
	543	cleanup:
65985d93	544	kzfree(base_addr);
af48b85b JK	545	return error;
	546	}
	547
e1123268 JK	548	static int __f2fs_setxattr(struct inode *inode, int index,
e1123268 JK	549	const char name, const void value, size_t size,
c02745ef	550	struct page *ipage, int flags)
af48b85b	551	{
af48b85b	552	struct f2fs_xattr_entry here, last;
af48b85b	553	void *base_addr;
65985d93	554	int found, newsize;
e1123268	555	size_t len;
65985d93	556	__u32 new_hsize;
a0995af6	557	int error = 0;
af48b85b JK	558
	559	if (name == NULL)
	560	return -EINVAL;
af48b85b JK	561
af48b85b JK	562	if (value == NULL)
e1123268	563	size = 0;
af48b85b	564
e1123268	565	len = strlen(name);
7c909772	566
037fe70c	567	if (len > F2FS_NAME_LEN)
af48b85b JK	568	return -ERANGE;
af48b85b JK	569
037fe70c CY	570	if (size > MAX_VALUE_LEN(inode))
	571	return -E2BIG;
	572
86696966 CY	573	error = read_all_xattrs(inode, ipage, &base_addr);
	574	if (error)
	575	return error;
af48b85b JK	576
af48b85b JK	577	/* find entry with wanted name. */
e1123268	578	here = __find_xattr(base_addr, index, len, name);
af48b85b	579
dd9cfe23	580	found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
af48b85b	581
916decbf JK	582	if ((flags & XATTR_REPLACE) && !found) {
	583	error = -ENODATA;
	584	goto exit;
	585	} else if ((flags & XATTR_CREATE) && found) {
	586	error = -EEXIST;
	587	goto exit;
	588	}
	589
	590	last = here;
af48b85b JK	591	while (!IS_XATTR_LAST_ENTRY(last))
	592	last = XATTR_NEXT_ENTRY(last);
	593
e1123268	594	newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
af48b85b JK	595
	596	/* 1. Check space */
	597	if (value) {
65985d93 JK	598	int free;
	599	/*
	600	* If value is NULL, it is remove operation.
e1c42045	601	* In case of update operation, we calculate free.
af48b85b	602	*/
65985d93	603	free = MIN_OFFSET(inode) - ((char )last - (char )base_addr);
af48b85b	604	if (found)
cc3de6a3	605	free = free + ENTRY_SIZE(here);
af48b85b	606
6bacf52f	607	if (unlikely(free < newsize)) {
58457f1c	608	error = -E2BIG;
65985d93	609	goto exit;
af48b85b JK	610	}
	611	}
	612
	613	/* 2. Remove old entry */
	614	if (found) {
65985d93 JK	615	/*
65985d93 JK	616	* If entry is found, remove old entry.
af48b85b JK	617	* If not found, remove operation is not needed.
	618	*/
	619	struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
	620	int oldsize = ENTRY_SIZE(here);
	621
	622	memmove(here, next, (char )last - (char )next);
	623	last = (struct f2fs_xattr_entry )((char )last - oldsize);
	624	memset(last, 0, oldsize);
	625	}
	626
65985d93 JK	627	new_hsize = (char )last - (char )base_addr;
65985d93 JK	628
af48b85b JK	629	/* 3. Write new entry */
af48b85b JK	630	if (value) {
65985d93 JK	631	char *pval;
	632	/*
	633	* Before we come here, old entry is removed.
	634	* We just write new entry.
	635	*/
e1123268 JK	636	last->e_name_index = index;
	637	last->e_name_len = len;
	638	memcpy(last->e_name, name, len);
	639	pval = last->e_name + len;
	640	memcpy(pval, value, size);
	641	last->e_value_size = cpu_to_le16(size);
65985d93	642	new_hsize += newsize;
af48b85b JK	643	}
af48b85b JK	644
65985d93 JK	645	error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
	646	if (error)
	647	goto exit;
af48b85b	648
91942321 JK	649	if (is_inode_flag_set(inode, FI_ACL_MODE)) {
91942321 JK	650	inode->i_mode = F2FS_I(inode)->i_acl_mode;
c2050a45	651	inode->i_ctime = current_time(inode);
91942321	652	clear_inode_flag(inode, FI_ACL_MODE);
af48b85b	653	}
f424f664 JK	654	if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
	655	!strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
	656	f2fs_set_encrypted_inode(inode);
7c45729a	657	f2fs_mark_inode_dirty_sync(inode, true);
bbf156f7 JK	658	if (!error && S_ISDIR(inode->i_mode))
bbf156f7 JK	659	set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
7c909772	660	exit:
65985d93	661	kzfree(base_addr);
af48b85b JK	662	return error;
af48b85b JK	663	}
52ab9560	664
e1123268 JK	665	int f2fs_setxattr(struct inode inode, int index, const char name,
e1123268 JK	666	const void *value, size_t size,
c02745ef	667	struct page *ipage, int flags)
52ab9560	668	{
4081363f	669	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
52ab9560 RK	670	int err;
52ab9560 RK	671
d631abda JK	672	/* this case is only from init_inode_metadata */
	673	if (ipage)
	674	return __f2fs_setxattr(inode, index, name, value,
	675	size, ipage, flags);
2c4db1a6	676	f2fs_balance_fs(sbi, true);
52ab9560	677
e479556b	678	f2fs_lock_op(sbi);
d928bfbf JK	679	/* protect xattr_ver */
d928bfbf JK	680	down_write(&F2FS_I(inode)->i_sem);
c02745ef	681	err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
d928bfbf	682	up_write(&F2FS_I(inode)->i_sem);
e479556b	683	f2fs_unlock_op(sbi);
52ab9560	684
d0239e1b	685	f2fs_update_time(sbi, REQ_TIME);
52ab9560 RK	686	return err;
52ab9560 RK	687	}