static long zcrypt_unlocked_ioctl()

in crypto/zcrypt_api.c [1589:1713]

• 107 lines of code
• 29 McCabe index (conditional complexity)

static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
				  unsigned long arg)
{
	int rc;
	struct ap_perms *perms =
		(struct ap_perms *) filp->private_data;

	rc = zcrypt_check_ioctl(perms, cmd);
	if (rc)
		return rc;

	switch (cmd) {
	case ICARSAMODEXPO:
		return icarsamodexpo_ioctl(perms, arg);
	case ICARSACRT:
		return icarsacrt_ioctl(perms, arg);
	case ZSECSENDCPRB:
		return zsecsendcprb_ioctl(perms, arg);
	case ZSENDEP11CPRB:
		return zsendep11cprb_ioctl(perms, arg);
	case ZCRYPT_DEVICE_STATUS: {
		struct zcrypt_device_status_ext *device_status;
		size_t total_size = MAX_ZDEV_ENTRIES_EXT
			* sizeof(struct zcrypt_device_status_ext);

		device_status = kzalloc(total_size, GFP_KERNEL);
		if (!device_status)
			return -ENOMEM;
		zcrypt_device_status_mask_ext(device_status);
		if (copy_to_user((char __user *) arg, device_status,
				 total_size))
			rc = -EFAULT;
		kfree(device_status);
		return rc;
	}
	case ZCRYPT_STATUS_MASK: {
		char status[AP_DEVICES];

		zcrypt_status_mask(status, AP_DEVICES);
		if (copy_to_user((char __user *) arg, status, sizeof(status)))
			return -EFAULT;
		return 0;
	}
	case ZCRYPT_QDEPTH_MASK: {
		char qdepth[AP_DEVICES];

		zcrypt_qdepth_mask(qdepth, AP_DEVICES);
		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
			return -EFAULT;
		return 0;
	}
	case ZCRYPT_PERDEV_REQCNT: {
		u32 *reqcnt;

		reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
		if (!reqcnt)
			return -ENOMEM;
		zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
		if (copy_to_user((int __user *) arg, reqcnt,
				 sizeof(u32) * AP_DEVICES))
			rc = -EFAULT;
		kfree(reqcnt);
		return rc;
	}
	case Z90STAT_REQUESTQ_COUNT:
		return put_user(zcrypt_requestq_count(), (int __user *) arg);
	case Z90STAT_PENDINGQ_COUNT:
		return put_user(zcrypt_pendingq_count(), (int __user *) arg);
	case Z90STAT_TOTALOPEN_COUNT:
		return put_user(atomic_read(&zcrypt_open_count),
				(int __user *) arg);
	case Z90STAT_DOMAIN_INDEX:
		return put_user(ap_domain_index, (int __user *) arg);
	/*
	 * Deprecated ioctls
	 */
	case ZDEVICESTATUS: {
		/* the old ioctl supports only 64 adapters */
		struct zcrypt_device_status *device_status;
		size_t total_size = MAX_ZDEV_ENTRIES
			* sizeof(struct zcrypt_device_status);

		device_status = kzalloc(total_size, GFP_KERNEL);
		if (!device_status)
			return -ENOMEM;
		zcrypt_device_status_mask(device_status);
		if (copy_to_user((char __user *) arg, device_status,
				 total_size))
			rc = -EFAULT;
		kfree(device_status);
		return rc;
	}
	case Z90STAT_STATUS_MASK: {
		/* the old ioctl supports only 64 adapters */
		char status[MAX_ZDEV_CARDIDS];

		zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
		if (copy_to_user((char __user *) arg, status, sizeof(status)))
			return -EFAULT;
		return 0;
	}
	case Z90STAT_QDEPTH_MASK: {
		/* the old ioctl supports only 64 adapters */
		char qdepth[MAX_ZDEV_CARDIDS];

		zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
			return -EFAULT;
		return 0;
	}
	case Z90STAT_PERDEV_REQCNT: {
		/* the old ioctl supports only 64 adapters */
		u32 reqcnt[MAX_ZDEV_CARDIDS];

		zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
		if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
			return -EFAULT;
		return 0;
	}
	/* unknown ioctl number */
	default:
		ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
		return -ENOIOCTLCMD;
	}
}