fscrypt_file_open
err = fscrypt_file_open(inode, file);
EXPORT_SYMBOL_GPL(fscrypt_file_open);
ret = fscrypt_file_open(inode, filp);
int err = fscrypt_file_open(inode, filp);
.open = fscrypt_file_open,
int fscrypt_file_open(struct inode *inode, struct file *filp);