f2fs: switch to fscrypt_prepare_setattr()

Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -743,6 +743,10 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 	if (err)
 		return err;
 
+	err = fscrypt_prepare_setattr(dentry, attr);
+	if (err)
+		return err;
+
 	if (is_quota_modification(inode, attr)) {
 		err = dquot_initialize(inode);
 		if (err)
@@ -758,14 +762,6 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 	}
 
 	if (attr->ia_valid & ATTR_SIZE) {
-		if (f2fs_encrypted_inode(inode)) {
-			err = fscrypt_get_encryption_info(inode);
-			if (err)
-				return err;
-			if (!fscrypt_has_encryption_key(inode))
-				return -ENOKEY;
-		}
-
 		if (attr->ia_size <= i_size_read(inode)) {
 			down_write(&F2FS_I(inode)->i_mmap_sem);
 			truncate_setsize(inode, attr->ia_size);