1 files changed, 327 insertions, 102 deletions

diff --git a/kernel/fs/f2fs/namei.c b/kernel/fs/f2fs/namei.c
index 658e8079a..2c32110f9 100644
--- a/kernel/fs/f2fs/namei.c
+++ b/kernel/fs/f2fs/namei.c
@@ -53,27 +53,34 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 	if (err) {
 		err = -EINVAL;
 		nid_free = true;
-		goto out;
+		goto fail;
 	}
 
-	if (f2fs_may_inline(inode))
+	/* If the directory encrypted, then we should encrypt the inode. */
+	if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
+		f2fs_set_encrypted_inode(inode);
+
+	if (f2fs_may_inline_data(inode))
 		set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
-	if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode))
+	if (f2fs_may_inline_dentry(inode))
 		set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
 
+	f2fs_init_extent_tree(inode, NULL);
+
+	stat_inc_inline_xattr(inode);
+	stat_inc_inline_inode(inode);
+	stat_inc_inline_dir(inode);
+
 	trace_f2fs_new_inode(inode, 0);
 	mark_inode_dirty(inode);
 	return inode;
 
-out:
-	clear_nlink(inode);
-	unlock_new_inode(inode);
 fail:
 	trace_f2fs_new_inode(inode, err);
 	make_bad_inode(inode);
-	iput(inode);
 	if (nid_free)
-		alloc_nid_failed(sbi, ino);
+		set_inode_flag(F2FS_I(inode), FI_FREE_NID);
+	iput(inode);
 	return ERR_PTR(err);
 }
 
@@ -82,7 +89,14 @@ static int is_multimedia_file(const unsigned char *s, const char *sub)
 	size_t slen = strlen(s);
 	size_t sublen = strlen(sub);
 
-	if (sublen > slen)
+	/*
+	 * filename format of multimedia file should be defined as:
+	 * "filename + '.' + extension".
+	 */
+	if (slen < sublen + 2)
+		return 0;
+
+	if (s[slen - sublen - 1] != '.')
 		return 0;
 
 	return !strncasecmp(s + slen - sublen, sub, sublen);
@@ -136,7 +150,6 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 
 	alloc_nid_done(sbi, ino);
 
-	stat_inc_inline_inode(inode);
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 
@@ -155,6 +168,10 @@ static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 	int err;
 
+	if (f2fs_encrypted_inode(dir) &&
+		!f2fs_is_child_context_consistent_with_parent(dir, inode))
+		return -EPERM;
+
 	f2fs_balance_fs(sbi);
 
 	inode->i_ctime = CURRENT_TIME;
@@ -232,32 +249,34 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	struct inode *inode = NULL;
 	struct f2fs_dir_entry *de;
 	struct page *page;
+	nid_t ino;
+	int err = 0;
 
 	if (dentry->d_name.len > F2FS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
 	de = f2fs_find_entry(dir, &dentry->d_name, &page);
-	if (de) {
-		nid_t ino = le32_to_cpu(de->ino);
-		f2fs_dentry_kunmap(dir, page);
-		f2fs_put_page(page, 0);
+	if (!de)
+		return d_splice_alias(inode, dentry);
 
-		inode = f2fs_iget(dir->i_sb, ino);
-		if (IS_ERR(inode))
-			return ERR_CAST(inode);
+	ino = le32_to_cpu(de->ino);
+	f2fs_dentry_kunmap(dir, page);
+	f2fs_put_page(page, 0);
 
-		if (f2fs_has_inline_dots(inode)) {
-			int err;
+	inode = f2fs_iget(dir->i_sb, ino);
+	if (IS_ERR(inode))
+		return ERR_CAST(inode);
 
-			err = __recover_dot_dentries(inode, dir->i_ino);
-			if (err) {
-				iget_failed(inode);
-				return ERR_PTR(err);
-			}
-		}
+	if (f2fs_has_inline_dots(inode)) {
+		err = __recover_dot_dentries(inode, dir->i_ino);
+		if (err)
+			goto err_out;
 	}
-
 	return d_splice_alias(inode, dentry);
+
+err_out:
+	iget_failed(inode);
+	return ERR_PTR(err);
 }
 
 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
@@ -296,19 +315,15 @@ fail:
 	return err;
 }
 
-static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
+static const char *f2fs_follow_link(struct dentry *dentry, void **cookie)
 {
-	struct page *page = page_follow_link_light(dentry, nd);
-
-	if (IS_ERR_OR_NULL(page))
-		return page;
-
-	/* this is broken symlink case */
-	if (*nd_get_link(nd) == 0) {
-		page_put_link(dentry, nd, page);
-		return ERR_PTR(-ENOENT);
+	const char *link = page_follow_link_light(dentry, cookie);
+	if (!IS_ERR(link) && !*link) {
+		/* this is broken symlink case */
+		page_put_link(NULL, *cookie);
+		link = ERR_PTR(-ENOENT);
 	}
-	return page;
+	return link;
 }
 
 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
@@ -316,16 +331,26 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 	struct inode *inode;
-	size_t symlen = strlen(symname) + 1;
+	size_t len = strlen(symname);
+	size_t p_len;
+	char *p_str;
+	struct f2fs_str disk_link = FSTR_INIT(NULL, 0);
+	struct f2fs_encrypted_symlink_data *sd = NULL;
 	int err;
 
+	if (len > dir->i_sb->s_blocksize)
+		return -ENAMETOOLONG;
+
 	f2fs_balance_fs(sbi);
 
 	inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 	if (IS_ERR(inode))
 		return PTR_ERR(inode);
 
-	inode->i_op = &f2fs_symlink_inode_operations;
+	if (f2fs_encrypted_inode(inode))
+		inode->i_op = &f2fs_encrypted_symlink_inode_operations;
+	else
+		inode->i_op = &f2fs_symlink_inode_operations;
 	inode->i_mapping->a_ops = &f2fs_dblock_aops;
 
 	f2fs_lock_op(sbi);
@@ -333,10 +358,46 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 	if (err)
 		goto out;
 	f2fs_unlock_op(sbi);
-
-	err = page_symlink(inode, symname, symlen);
 	alloc_nid_done(sbi, inode->i_ino);
 
+	if (f2fs_encrypted_inode(dir)) {
+		struct qstr istr = QSTR_INIT(symname, len);
+
+		err = f2fs_get_encryption_info(inode);
+		if (err)
+			goto err_out;
+
+		err = f2fs_fname_crypto_alloc_buffer(inode, len, &disk_link);
+		if (err)
+			goto err_out;
+
+		err = f2fs_fname_usr_to_disk(inode, &istr, &disk_link);
+		if (err < 0)
+			goto err_out;
+
+		p_len = encrypted_symlink_data_len(disk_link.len) + 1;
+
+		if (p_len > dir->i_sb->s_blocksize) {
+			err = -ENAMETOOLONG;
+			goto err_out;
+		}
+
+		sd = kzalloc(p_len, GFP_NOFS);
+		if (!sd) {
+			err = -ENOMEM;
+			goto err_out;
+		}
+		memcpy(sd->encrypted_path, disk_link.name, disk_link.len);
+		sd->len = cpu_to_le16(disk_link.len);
+		p_str = (char *)sd;
+	} else {
+		p_len = len + 1;
+		p_str = (char *)symname;
+	}
+
+	err = page_symlink(inode, p_str, p_len);
+
+err_out:
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 
@@ -349,10 +410,17 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 	 * If the symlink path is stored into inline_data, there is no
 	 * performance regression.
 	 */
-	filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
+	if (!err) {
+		filemap_write_and_wait_range(inode->i_mapping, 0, p_len - 1);
 
-	if (IS_DIRSYNC(dir))
-		f2fs_sync_fs(sbi->sb, 1);
+		if (IS_DIRSYNC(dir))
+			f2fs_sync_fs(sbi->sb, 1);
+	} else {
+		f2fs_unlink(dir, dentry);
+	}
+
+	kfree(sd);
+	f2fs_fname_crypto_free_buffer(&disk_link);
 	return err;
 out:
 	handle_failed_inode(inode);
@@ -383,7 +451,6 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 		goto out_fail;
 	f2fs_unlock_op(sbi);
 
-	stat_inc_inline_dir(inode);
 	alloc_nid_done(sbi, inode->i_ino);
 
 	d_instantiate(dentry, inode);
@@ -414,9 +481,6 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
 	struct inode *inode;
 	int err = 0;
 
-	if (!new_valid_dev(rdev))
-		return -EINVAL;
-
 	f2fs_balance_fs(sbi);
 
 	inode = f2fs_new_inode(dir, mode);
@@ -445,19 +509,101 @@ out:
 	return err;
 }
 
+static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
+					umode_t mode, struct inode **whiteout)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	int err;
+
+	if (!whiteout)
+		f2fs_balance_fs(sbi);
+
+	inode = f2fs_new_inode(dir, mode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	if (whiteout) {
+		init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
+		inode->i_op = &f2fs_special_inode_operations;
+	} else {
+		inode->i_op = &f2fs_file_inode_operations;
+		inode->i_fop = &f2fs_file_operations;
+		inode->i_mapping->a_ops = &f2fs_dblock_aops;
+	}
+
+	f2fs_lock_op(sbi);
+	err = acquire_orphan_inode(sbi);
+	if (err)
+		goto out;
+
+	err = f2fs_do_tmpfile(inode, dir);
+	if (err)
+		goto release_out;
+
+	/*
+	 * add this non-linked tmpfile to orphan list, in this way we could
+	 * remove all unused data of tmpfile after abnormal power-off.
+	 */
+	add_orphan_inode(sbi, inode->i_ino);
+	f2fs_unlock_op(sbi);
+
+	alloc_nid_done(sbi, inode->i_ino);
+
+	if (whiteout) {
+		inode_dec_link_count(inode);
+		*whiteout = inode;
+	} else {
+		d_tmpfile(dentry, inode);
+	}
+	unlock_new_inode(inode);
+	return 0;
+
+release_out:
+	release_orphan_inode(sbi);
+out:
+	handle_failed_inode(inode);
+	return err;
+}
+
+static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	if (f2fs_encrypted_inode(dir)) {
+		int err = f2fs_get_encryption_info(dir);
+		if (err)
+			return err;
+	}
+
+	return __f2fs_tmpfile(dir, dentry, mode, NULL);
+}
+
+static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
+{
+	return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
+}
+
 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
-			struct inode *new_dir, struct dentry *new_dentry)
+			struct inode *new_dir, struct dentry *new_dentry,
+			unsigned int flags)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 	struct inode *old_inode = d_inode(old_dentry);
 	struct inode *new_inode = d_inode(new_dentry);
+	struct inode *whiteout = NULL;
 	struct page *old_dir_page;
-	struct page *old_page, *new_page;
+	struct page *old_page, *new_page = NULL;
 	struct f2fs_dir_entry *old_dir_entry = NULL;
 	struct f2fs_dir_entry *old_entry;
 	struct f2fs_dir_entry *new_entry;
 	int err = -ENOENT;
 
+	if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) &&
+		!f2fs_is_child_context_consistent_with_parent(new_dir,
+							old_inode)) {
+		err = -EPERM;
+		goto out;
+	}
+
 	f2fs_balance_fs(sbi);
 
 	old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
@@ -471,17 +617,23 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			goto out_old;
 	}
 
+	if (flags & RENAME_WHITEOUT) {
+		err = f2fs_create_whiteout(old_dir, &whiteout);
+		if (err)
+			goto out_dir;
+	}
+
 	if (new_inode) {
 
 		err = -ENOTEMPTY;
 		if (old_dir_entry && !f2fs_empty_dir(new_inode))
-			goto out_dir;
+			goto out_whiteout;
 
 		err = -ENOENT;
 		new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
 						&new_page);
 		if (!new_entry)
-			goto out_dir;
+			goto out_whiteout;
 
 		f2fs_lock_op(sbi);
 
@@ -489,7 +641,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		if (err)
 			goto put_out_dir;
 
-		if (update_dent_inode(old_inode, &new_dentry->d_name)) {
+		if (update_dent_inode(old_inode, new_inode,
+						&new_dentry->d_name)) {
 			release_orphan_inode(sbi);
 			goto put_out_dir;
 		}
@@ -518,7 +671,7 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		err = f2fs_add_link(new_dentry, old_inode);
 		if (err) {
 			f2fs_unlock_op(sbi);
-			goto out_dir;
+			goto out_whiteout;
 		}
 
 		if (old_dir_entry) {
@@ -529,6 +682,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	down_write(&F2FS_I(old_inode)->i_sem);
 	file_lost_pino(old_inode);
+	if (new_inode && file_enc_name(new_inode))
+		file_set_enc_name(old_inode);
 	up_write(&F2FS_I(old_inode)->i_sem);
 
 	old_inode->i_ctime = CURRENT_TIME;
@@ -536,8 +691,18 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
 
+	if (whiteout) {
+		whiteout->i_state |= I_LINKABLE;
+		set_inode_flag(F2FS_I(whiteout), FI_INC_LINK);
+		err = f2fs_add_link(old_dentry, whiteout);
+		if (err)
+			goto put_out_dir;
+		whiteout->i_state &= ~I_LINKABLE;
+		iput(whiteout);
+	}
+
 	if (old_dir_entry) {
-		if (old_dir != new_dir) {
+		if (old_dir != new_dir && !whiteout) {
 			f2fs_set_link(old_inode, old_dir_entry,
 						old_dir_page, new_dir);
 			update_inode_page(old_inode);
@@ -558,8 +723,13 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 put_out_dir:
 	f2fs_unlock_op(sbi);
-	f2fs_dentry_kunmap(new_dir, new_page);
-	f2fs_put_page(new_page, 0);
+	if (new_page) {
+		f2fs_dentry_kunmap(new_dir, new_page);
+		f2fs_put_page(new_page, 0);
+	}
+out_whiteout:
+	if (whiteout)
+		iput(whiteout);
 out_dir:
 	if (old_dir_entry) {
 		f2fs_dentry_kunmap(old_inode, old_dir_page);
@@ -585,6 +755,14 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 	int old_nlink = 0, new_nlink = 0;
 	int err = -ENOENT;
 
+	if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) &&
+		(old_dir != new_dir) &&
+		(!f2fs_is_child_context_consistent_with_parent(new_dir,
+								old_inode) ||
+		!f2fs_is_child_context_consistent_with_parent(old_dir,
+								new_inode)))
+		return -EPERM;
+
 	f2fs_balance_fs(sbi);
 
 	old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
@@ -631,13 +809,17 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	f2fs_lock_op(sbi);
 
-	err = update_dent_inode(old_inode, &new_dentry->d_name);
+	err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name);
 	if (err)
 		goto out_unlock;
+	if (file_enc_name(new_inode))
+		file_set_enc_name(old_inode);
 
-	err = update_dent_inode(new_inode, &old_dentry->d_name);
+	err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name);
 	if (err)
 		goto out_undo;
+	if (file_enc_name(old_inode))
+		file_set_enc_name(new_inode);
 
 	/* update ".." directory entry info of old dentry */
 	if (old_dir_entry)
@@ -695,8 +877,11 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 		f2fs_sync_fs(sbi->sb, 1);
 	return 0;
 out_undo:
-	/* Still we may fail to recover name info of f2fs_inode here */
-	update_dent_inode(old_inode, &old_dentry->d_name);
+	/*
+	 * Still we may fail to recover name info of f2fs_inode here
+	 * Drop it, once its name is set as encrypted
+	 */
+	update_dent_inode(old_inode, old_inode, &old_dentry->d_name);
 out_unlock:
 	f2fs_unlock_op(sbi);
 out_new_dir:
@@ -723,7 +908,7 @@ static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 			struct inode *new_dir, struct dentry *new_dentry,
 			unsigned int flags)
 {
-	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
 		return -EINVAL;
 
 	if (flags & RENAME_EXCHANGE) {
@@ -734,53 +919,93 @@ static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 	 * VFS has already handled the new dentry existence case,
 	 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
 	 */
-	return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
+	return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
 }
 
-static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+#ifdef CONFIG_F2FS_FS_ENCRYPTION
+static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie)
 {
-	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
-	struct inode *inode;
-	int err;
-
-	inode = f2fs_new_inode(dir, mode);
-	if (IS_ERR(inode))
-		return PTR_ERR(inode);
-
-	inode->i_op = &f2fs_file_inode_operations;
-	inode->i_fop = &f2fs_file_operations;
-	inode->i_mapping->a_ops = &f2fs_dblock_aops;
-
-	f2fs_lock_op(sbi);
-	err = acquire_orphan_inode(sbi);
-	if (err)
-		goto out;
-
-	err = f2fs_do_tmpfile(inode, dir);
-	if (err)
-		goto release_out;
-
-	/*
-	 * add this non-linked tmpfile to orphan list, in this way we could
-	 * remove all unused data of tmpfile after abnormal power-off.
-	 */
-	add_orphan_inode(sbi, inode->i_ino);
-	f2fs_unlock_op(sbi);
-
-	alloc_nid_done(sbi, inode->i_ino);
+	struct page *cpage = NULL;
+	char *caddr, *paddr = NULL;
+	struct f2fs_str cstr;
+	struct f2fs_str pstr = FSTR_INIT(NULL, 0);
+	struct inode *inode = d_inode(dentry);
+	struct f2fs_encrypted_symlink_data *sd;
+	loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1);
+	u32 max_size = inode->i_sb->s_blocksize;
+	int res;
+
+	res = f2fs_get_encryption_info(inode);
+	if (res)
+		return ERR_PTR(res);
+
+	cpage = read_mapping_page(inode->i_mapping, 0, NULL);
+	if (IS_ERR(cpage))
+		return ERR_CAST(cpage);
+	caddr = kmap(cpage);
+	caddr[size] = 0;
+
+	/* Symlink is encrypted */
+	sd = (struct f2fs_encrypted_symlink_data *)caddr;
+	cstr.len = le16_to_cpu(sd->len);
+	cstr.name = kmalloc(cstr.len, GFP_NOFS);
+	if (!cstr.name) {
+		res = -ENOMEM;
+		goto errout;
+	}
+	memcpy(cstr.name, sd->encrypted_path, cstr.len);
 
-	stat_inc_inline_inode(inode);
-	d_tmpfile(dentry, inode);
-	unlock_new_inode(inode);
-	return 0;
+	/* this is broken symlink case */
+	if (cstr.name[0] == 0 && cstr.len == 0) {
+		res = -ENOENT;
+		goto errout;
+	}
 
-release_out:
-	release_orphan_inode(sbi);
-out:
-	handle_failed_inode(inode);
-	return err;
+	if ((cstr.len + sizeof(struct f2fs_encrypted_symlink_data) - 1) >
+								max_size) {
+		/* Symlink data on the disk is corrupted */
+		res = -EIO;
+		goto errout;
+	}
+	res = f2fs_fname_crypto_alloc_buffer(inode, cstr.len, &pstr);
+	if (res)
+		goto errout;
+
+	res = f2fs_fname_disk_to_usr(inode, NULL, &cstr, &pstr);
+	if (res < 0)
+		goto errout;
+
+	kfree(cstr.name);
+
+	paddr = pstr.name;
+
+	/* Null-terminate the name */
+	paddr[res] = '\0';
+
+	kunmap(cpage);
+	page_cache_release(cpage);
+	return *cookie = paddr;
+errout:
+	kfree(cstr.name);
+	f2fs_fname_crypto_free_buffer(&pstr);
+	kunmap(cpage);
+	page_cache_release(cpage);
+	return ERR_PTR(res);
 }
 
+const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
+	.readlink       = generic_readlink,
+	.follow_link    = f2fs_encrypted_follow_link,
+	.put_link       = kfree_put_link,
+	.getattr	= f2fs_getattr,
+	.setattr	= f2fs_setattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
+	.listxattr	= f2fs_listxattr,
+	.removexattr	= generic_removexattr,
+};
+#endif
+
 const struct inode_operations f2fs_dir_inode_operations = {
 	.create		= f2fs_create,
 	.lookup		= f2fs_lookup,