text: /*-
   *   BSD LICENSE
   *
   *   Copyright (c) Intel Corporation.
   *   All rights reserved.
   *
   *   Redistribution and use in source and binary forms, with or without
   *   modification, are permitted provided that the following conditions
   *   are met:
   *
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in
   *       the documentation and/or other materials provided with the
   *       distribution.
   *     * Neither the name of Intel Corporation nor the names of its
   *       contributors may be used to endorse or promote products derived
   *       from this software without specific prior written permission.
   *
   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "spdk/stdinc.h"
  
  #include "CUnit/Basic.h"
  #include "spdk_cunit.h"
  #include "spdk/thread.h"
  #include "spdk_internal/mock.h"
  #include "common/lib/test_env.c"
  #include "unit/lib/json_mock.c"
  
  #include "vhost/vhost.c"
  
  DEFINE_STUB(rte_vhost_set_vring_base, int, (int vid, uint16_t queue_id,
  		uint16_t last_avail_idx, uint16_t last_used_idx), 0);
  DEFINE_STUB(rte_vhost_get_vring_base, int, (int vid, uint16_t queue_id,
  		uint16_t *last_avail_idx, uint16_t *last_used_idx), 0);
  DEFINE_STUB_V(vhost_session_install_rte_compat_hooks,
  	      (struct spdk_vhost_session *vsession));
  DEFINE_STUB(vhost_register_unix_socket, int, (const char *path, const char *name,
  		uint64_t virtio_features, uint64_t disabled_features, uint64_t protocol_features), 0);
  DEFINE_STUB(vhost_driver_unregister, int, (const char *path), 0);
  DEFINE_STUB(spdk_mem_register, int, (void *vaddr, size_t len), 0);
  DEFINE_STUB(spdk_mem_unregister, int, (void *vaddr, size_t len), 0);
  DEFINE_STUB(rte_vhost_vring_call, int, (int vid, uint16_t vring_idx), 0);
  DEFINE_STUB_V(rte_vhost_log_used_vring, (int vid, uint16_t vring_idx,
  		uint64_t offset, uint64_t len));
  
  DEFINE_STUB(rte_vhost_get_mem_table, int, (int vid, struct rte_vhost_memory **mem), 0);
  DEFINE_STUB(rte_vhost_get_negotiated_features, int, (int vid, uint64_t *features), 0);
  DEFINE_STUB(rte_vhost_get_vhost_vring, int,
  	    (int vid, uint16_t vring_idx, struct rte_vhost_vring *vring), 0);
  DEFINE_STUB(rte_vhost_enable_guest_notification, int,
  	    (int vid, uint16_t queue_id, int enable), 0);
  DEFINE_STUB(rte_vhost_get_ifname, int, (int vid, char *buf, size_t len), 0);
  DEFINE_STUB(rte_vhost_driver_start, int, (const char *name), 0);
  DEFINE_STUB(rte_vhost_driver_callback_register, int,
  	    (const char *path, struct vhost_device_ops const *const ops), 0);
  DEFINE_STUB(rte_vhost_driver_disable_features, int, (const char *path, uint64_t features), 0);
  DEFINE_STUB(rte_vhost_driver_set_features, int, (const char *path, uint64_t features), 0);
  DEFINE_STUB(rte_vhost_driver_register, int, (const char *path, uint64_t flags), 0);
  
  void *
  spdk_call_unaffinitized(void *cb(void *arg), void *arg)
  {
  	return cb(arg);
  }
  
  static struct spdk_vhost_dev_backend g_vdev_backend;
  
  static int
  test_setup(void)
  {
  	return 0;
  }
  
  static int
  alloc_vdev(struct spdk_vhost_dev **vdev_p, const char *name, const char *cpumask)
  {
  	struct spdk_vhost_dev *vdev = NULL;
  	int rc;
  
  	/* spdk_vhost_dev must be allocated on a cache line boundary. */
  	rc = posix_memalign((void **)&vdev, 64, sizeof(*vdev));
  	CU_ASSERT(rc == 0);
  	SPDK_CU_ASSERT_FATAL(vdev != NULL);
  	memset(vdev, 0, sizeof(*vdev));
  	rc = vhost_dev_register(vdev, name, cpumask, &g_vdev_backend);
  	if (rc == 0) {
  		*vdev_p = vdev;
  	} else {
  		free(vdev);
  		*vdev_p = NULL;
  	}
  
  	return rc;
  }
  
  static void
  start_vdev(struct spdk_vhost_dev *vdev)
  {
  	struct rte_vhost_memory *mem;
  	struct spdk_vhost_session *vsession = NULL;
  	int rc;
  
  	mem = calloc(1, sizeof(*mem) + 2 * sizeof(struct rte_vhost_mem_region));
  	SPDK_CU_ASSERT_FATAL(mem != NULL);
  	mem->nregions = 2;
  	mem->regions[0].guest_phys_addr = 0;
  	mem->regions[0].size = 0x400000; /* 4 MB */
  	mem->regions[0].host_user_addr = 0x1000000;
  	mem->regions[1].guest_phys_addr = 0x400000;
  	mem->regions[1].size = 0x400000; /* 4 MB */
  	mem->regions[1].host_user_addr = 0x2000000;
  
  	assert(TAILQ_EMPTY(&vdev->vsessions));
  	/* spdk_vhost_dev must be allocated on a cache line boundary. */
  	rc = posix_memalign((void **)&vsession, 64, sizeof(*vsession));
  	CU_ASSERT(rc == 0);
  	SPDK_CU_ASSERT_FATAL(vsession != NULL);
  	vsession->started = true;
  	vsession->vid = 0;
  	vsession->mem = mem;
  	TAILQ_INSERT_TAIL(&vdev->vsessions, vsession, tailq);
  }
  
  static void
  stop_vdev(struct spdk_vhost_dev *vdev)
  {
  	struct spdk_vhost_session *vsession = TAILQ_FIRST(&vdev->vsessions);
  
  	TAILQ_REMOVE(&vdev->vsessions, vsession, tailq);
  	free(vsession->mem);
  	free(vsession);
  }
  
  static void
  cleanup_vdev(struct spdk_vhost_dev *vdev)
  {
  	if (!TAILQ_EMPTY(&vdev->vsessions)) {
  		stop_vdev(vdev);
  	}
  	vhost_dev_unregister(vdev);
  	free(vdev);
  }
  
  static void
  desc_to_iov_test(void)
  {
  	struct spdk_vhost_dev *vdev;
  	struct spdk_vhost_session *vsession;
  	struct iovec iov[SPDK_VHOST_IOVS_MAX];
  	uint16_t iov_index;
  	struct vring_desc desc;
  	int rc;
  
  	spdk_cpuset_set_cpu(&g_vhost_core_mask, 0, true);
  
  	rc = alloc_vdev(&vdev, "vdev_name_0", "0x1");
  	SPDK_CU_ASSERT_FATAL(rc == 0 && vdev);
  	start_vdev(vdev);
  
  	vsession = TAILQ_FIRST(&vdev->vsessions);
  
  	/* Test simple case where iov falls fully within a 2MB page. */
  	desc.addr = 0x110000;
  	desc.len = 0x1000;
  	iov_index = 0;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc == 0);
  	CU_ASSERT(iov_index == 1);
  	CU_ASSERT(iov[0].iov_base == (void *)0x1110000);
  	CU_ASSERT(iov[0].iov_len == 0x1000);
  	/*
  	 * Always memset the iov to ensure each test validates data written by its call
  	 * to the function under test.
  	 */
  	memset(iov, 0, sizeof(iov));
  
  	/* Same test, but ensure it respects the non-zero starting iov_index. */
  	iov_index = SPDK_VHOST_IOVS_MAX - 1;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc == 0);
  	CU_ASSERT(iov_index == SPDK_VHOST_IOVS_MAX);
  	CU_ASSERT(iov[SPDK_VHOST_IOVS_MAX - 1].iov_base == (void *)0x1110000);
  	CU_ASSERT(iov[SPDK_VHOST_IOVS_MAX - 1].iov_len == 0x1000);
  	memset(iov, 0, sizeof(iov));
  
  	/* Test for failure if iov_index already equals SPDK_VHOST_IOVS_MAX. */
  	iov_index = SPDK_VHOST_IOVS_MAX;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc != 0);
  	memset(iov, 0, sizeof(iov));
  
  	/* Test case where iov spans a 2MB boundary, but does not span a vhost memory region. */
  	desc.addr = 0x1F0000;
  	desc.len = 0x20000;
  	iov_index = 0;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc == 0);
  	CU_ASSERT(iov_index == 1);
  	CU_ASSERT(iov[0].iov_base == (void *)0x11F0000);
  	CU_ASSERT(iov[0].iov_len == 0x20000);
  	memset(iov, 0, sizeof(iov));
  
  	/* Same test, but ensure it respects the non-zero starting iov_index. */
  	iov_index = SPDK_VHOST_IOVS_MAX - 1;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc == 0);
  	CU_ASSERT(iov_index == SPDK_VHOST_IOVS_MAX);
  	CU_ASSERT(iov[SPDK_VHOST_IOVS_MAX - 1].iov_base == (void *)0x11F0000);
  	CU_ASSERT(iov[SPDK_VHOST_IOVS_MAX - 1].iov_len == 0x20000);
  	memset(iov, 0, sizeof(iov));
  
  	/* Test case where iov spans a vhost memory region. */
  	desc.addr = 0x3F0000;
  	desc.len = 0x20000;
  	iov_index = 0;
  	rc = vhost_vring_desc_to_iov(vsession, iov, &iov_index, &desc);
  	CU_ASSERT(rc == 0);
  	CU_ASSERT(iov_index == 2);
  	CU_ASSERT(iov[0].iov_base == (void *)0x13F0000);
  	CU_ASSERT(iov[0].iov_len == 0x10000);
  	CU_ASSERT(iov[1].iov_base == (void *)0x2000000);
  	CU_ASSERT(iov[1].iov_len == 0x10000);
  	memset(iov, 0, sizeof(iov));
  
  	cleanup_vdev(vdev);
  
  	CU_ASSERT(true);
  }
  
  static void
  create_controller_test(void)
  {
  	struct spdk_vhost_dev *vdev, *vdev2;
  	int ret;
  	char long_name[PATH_MAX];
  
  	spdk_cpuset_set_cpu(&g_vhost_core_mask, 0, true);
  
  	/* Create device with no name */
  	ret = alloc_vdev(&vdev, NULL, "0x1");
  	CU_ASSERT(ret != 0);
  
  	/* Create device with incorrect cpumask */
  	ret = alloc_vdev(&vdev, "vdev_name_0", "0x2");
  	CU_ASSERT(ret != 0);
  
  	/* Create device with too long name and path */
  	memset(long_name, 'x', sizeof(long_name));
  	long_name[PATH_MAX - 1] = 0;
  	snprintf(dev_dirname, sizeof(dev_dirname), "some_path/");
  	ret = alloc_vdev(&vdev, long_name, "0x1");
  	CU_ASSERT(ret != 0);
  	dev_dirname[0] = 0;
  
  	/* Create device when device name is already taken */
  	ret = alloc_vdev(&vdev, "vdev_name_0", "0x1");
  	SPDK_CU_ASSERT_FATAL(ret == 0 && vdev);
  	ret = alloc_vdev(&vdev2, "vdev_name_0", "0x1");
  	CU_ASSERT(ret != 0);
  	cleanup_vdev(vdev);
  }
  
  static void
  session_find_by_vid_test(void)
  {
  	struct spdk_vhost_dev *vdev;
  	struct spdk_vhost_session *vsession;
  	struct spdk_vhost_session *tmp;
  	int rc;
  
  	rc = alloc_vdev(&vdev, "vdev_name_0", "0x1");
  	SPDK_CU_ASSERT_FATAL(rc == 0 && vdev);
  	start_vdev(vdev);
  
  	vsession = TAILQ_FIRST(&vdev->vsessions);
  
  	tmp = vhost_session_find_by_vid(vsession->vid);
  	CU_ASSERT(tmp == vsession);
  
  	/* Search for a device with incorrect vid */
  	tmp = vhost_session_find_by_vid(vsession->vid + 0xFF);
  	CU_ASSERT(tmp == NULL);
  
  	cleanup_vdev(vdev);
  }
  
  static void
  remove_controller_test(void)
  {
  	struct spdk_vhost_dev *vdev;
  	int ret;
  
  	ret = alloc_vdev(&vdev, "vdev_name_0", "0x1");
  	SPDK_CU_ASSERT_FATAL(ret == 0 && vdev);
  
  	/* Remove device when controller is in use */
  	start_vdev(vdev);
  	SPDK_CU_ASSERT_FATAL(!TAILQ_EMPTY(&vdev->vsessions));
  	ret = vhost_dev_unregister(vdev);
  	CU_ASSERT(ret != 0);
  
  	cleanup_vdev(vdev);
  }
  
  static void
  vq_avail_ring_get_test(void)
  {
  	struct spdk_vhost_virtqueue vq;
  	uint16_t avail_mem[34];
  	uint16_t reqs[32];
  	uint16_t reqs_len, ret, i;
  
  	/* Basic example reap all requests */
  	vq.vring.avail = (struct vring_avail *)avail_mem;
  	vq.vring.size = 32;
  	vq.last_avail_idx = 24;
  	vq.vring.avail->idx = 29;
  	reqs_len = 6;
  
  	for (i = 0; i < 32; i++) {
  		vq.vring.avail->ring[i] = i;
  	}
  
  	ret = vhost_vq_avail_ring_get(&vq, reqs, reqs_len);
  	CU_ASSERT(ret == 5);
  	CU_ASSERT(vq.last_avail_idx == 29);
  	for (i = 0; i < ret; i++) {
  		CU_ASSERT(reqs[i] == vq.vring.avail->ring[i + 24]);
  	}
  
  	/* Basic example reap only some requests */
  	vq.last_avail_idx = 20;
  	vq.vring.avail->idx = 29;
  	reqs_len = 6;
  
  	ret = vhost_vq_avail_ring_get(&vq, reqs, reqs_len);
  	CU_ASSERT(ret == reqs_len);
  	CU_ASSERT(vq.last_avail_idx == 26);
  	for (i = 0; i < ret; i++) {
  		CU_ASSERT(reqs[i] == vq.vring.avail->ring[i + 20]);
  	}
  
  	/* Test invalid example */
  	vq.last_avail_idx = 20;
  	vq.vring.avail->idx = 156;
  	reqs_len = 6;
  
  	ret = vhost_vq_avail_ring_get(&vq, reqs, reqs_len);
  	CU_ASSERT(ret == 0);
  
  	/* Test overflow in the avail->idx variable. */
  	vq.last_avail_idx = 65535;
  	vq.vring.avail->idx = 4;
  	reqs_len = 6;
  	ret = vhost_vq_avail_ring_get(&vq, reqs, reqs_len);
  	CU_ASSERT(ret == 5);
  	CU_ASSERT(vq.last_avail_idx == 4);
  	CU_ASSERT(reqs[0] == vq.vring.avail->ring[31]);
  	for (i = 1; i < ret; i++) {
  		CU_ASSERT(reqs[i] == vq.vring.avail->ring[i - 1]);
  	}
  }
  
  static bool
  vq_desc_guest_is_used(struct spdk_vhost_virtqueue *vq, int16_t guest_last_used_idx,
  		      int16_t guest_used_phase)
  {
  	return (!!(vq->vring.desc_packed[guest_last_used_idx].flags & VRING_DESC_F_USED) ==
  		!!guest_used_phase);
  }
  
  static void
  vq_desc_guest_set_avail(struct spdk_vhost_virtqueue *vq, int16_t *guest_last_avail_idx,
  			int16_t *guest_avail_phase)
  {
  	if (*guest_avail_phase) {
  		vq->vring.desc_packed[*guest_last_avail_idx].flags |= VRING_DESC_F_AVAIL;
  		vq->vring.desc_packed[*guest_last_avail_idx].flags &= ~VRING_DESC_F_USED;
  	} else {
  		vq->vring.desc_packed[*guest_last_avail_idx].flags &= ~VRING_DESC_F_AVAIL;
  		vq->vring.desc_packed[*guest_last_avail_idx].flags |= VRING_DESC_F_USED;
  	}
  
  	if (++(*guest_last_avail_idx) >= vq->vring.size) {
  		*guest_last_avail_idx -= vq->vring.size;
  		*guest_avail_phase = !(*guest_avail_phase);
  	}
  }
  
  static int16_t
  vq_desc_guest_handle_completed_desc(struct spdk_vhost_virtqueue *vq, int16_t *guest_last_used_idx,
  				    int16_t *guest_used_phase)
  {
  	int16_t buffer_id = -1;
  
  	if (vq_desc_guest_is_used(vq, *guest_last_used_idx, *guest_used_phase)) {
  		buffer_id = vq->vring.desc_packed[*guest_last_used_idx].id;
  		if (++(*guest_last_used_idx) >= vq->vring.size) {
  			*guest_last_used_idx -= vq->vring.size;
  			*guest_used_phase = !(*guest_used_phase);
  		}
  
  		return buffer_id;
  	}
  
  	return -1;
  }
  
  static void
  vq_packed_ring_test(void)
  {
  	struct spdk_vhost_session vs = {};
  	struct spdk_vhost_virtqueue vq = {};
  	struct vring_packed_desc descs[4];
  	uint16_t guest_last_avail_idx = 0, guest_last_used_idx = 0;
  	uint16_t guest_avail_phase = 1, guest_used_phase = 1;
  	int i;
  	int16_t chain_num;
  
  	vq.vring.desc_packed = descs;
  	vq.vring.size = 4;
  
  	/* avail and used wrap counter are initialized to 1 */
  	vq.packed.avail_phase = 1;
  	vq.packed.used_phase = 1;
  	vq.packed.packed_ring = true;
  	memset(descs, 0, sizeof(descs));
  
  	CU_ASSERT(vhost_vq_packed_ring_is_avail(&vq) == false);
  
  	/* Guest send requests */
  	for (i = 0; i < vq.vring.size; i++) {
  		descs[guest_last_avail_idx].id = i;
  		/* Set the desc available */
  		vq_desc_guest_set_avail(&vq, &guest_last_avail_idx, &guest_avail_phase);
  	}
  	CU_ASSERT(guest_last_avail_idx == 0);
  	CU_ASSERT(guest_avail_phase == 0);
  
  	/* Host handle available descs */
  	CU_ASSERT(vhost_vq_packed_ring_is_avail(&vq) == true);
  	i = 0;
  	while (vhost_vq_packed_ring_is_avail(&vq)) {
  		CU_ASSERT(vhost_vring_packed_desc_get_buffer_id(&vq, vq.last_avail_idx, &chain_num) == i++);
  		CU_ASSERT(chain_num == 1);
  	}
  
  	/* Host complete them out of order: 1, 0, 2. */
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 1, 1);
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 0, 1);
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 2, 1);
  
  	/* Host has got all the available request but only complete three requests */
  	CU_ASSERT(vq.last_avail_idx == 0);
  	CU_ASSERT(vq.packed.avail_phase == 0);
  	CU_ASSERT(vq.last_used_idx == 3);
  	CU_ASSERT(vq.packed.used_phase == 1);
  
  	/* Guest handle completed requests */
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 1);
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 0);
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 2);
  	CU_ASSERT(guest_last_used_idx == 3);
  	CU_ASSERT(guest_used_phase == 1);
  
  	/* There are three descs available the guest can send three request again */
  	for (i = 0; i < 3; i++) {
  		descs[guest_last_avail_idx].id = 2 - i;
  		/* Set the desc available */
  		vq_desc_guest_set_avail(&vq, &guest_last_avail_idx, &guest_avail_phase);
  	}
  
  	/* Host handle available descs */
  	CU_ASSERT(vhost_vq_packed_ring_is_avail(&vq) == true);
  	i = 2;
  	while (vhost_vq_packed_ring_is_avail(&vq)) {
  		CU_ASSERT(vhost_vring_packed_desc_get_buffer_id(&vq, vq.last_avail_idx, &chain_num) == i--);
  		CU_ASSERT(chain_num == 1);
  	}
  
  	/* There are four requests in Host, the new three ones and left one */
  	CU_ASSERT(vq.last_avail_idx == 3);
  	/* Available wrap conter should overturn */
  	CU_ASSERT(vq.packed.avail_phase == 0);
  
  	/* Host complete all the requests */
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 1, 1);
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 0, 1);
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 3, 1);
  	vhost_vq_packed_ring_enqueue(&vs, &vq, 1, 2, 1);
  
  	CU_ASSERT(vq.last_used_idx == vq.last_avail_idx);
  	CU_ASSERT(vq.packed.used_phase == vq.packed.avail_phase);
  
  	/* Guest handle completed requests */
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 1);
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 0);
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 3);
  	CU_ASSERT(vq_desc_guest_handle_completed_desc(&vq, &guest_last_used_idx, &guest_used_phase) == 2);
  
  	CU_ASSERT(guest_last_avail_idx == guest_last_used_idx);
  	CU_ASSERT(guest_avail_phase == guest_used_phase);
  }
  
  int
  main(int argc, char **argv)
  {
  	CU_pSuite	suite = NULL;
  	unsigned int	num_failures;
  
  	CU_set_error_action(CUEA_ABORT);
  	CU_initialize_registry();
  
  	suite = CU_add_suite("vhost_suite", test_setup, NULL);
  
  	CU_ADD_TEST(suite, desc_to_iov_test);
  	CU_ADD_TEST(suite, create_controller_test);
  	CU_ADD_TEST(suite, session_find_by_vid_test);
  	CU_ADD_TEST(suite, remove_controller_test);
  	CU_ADD_TEST(suite, vq_avail_ring_get_test);
  	CU_ADD_TEST(suite, vq_packed_ring_test);
  
  	CU_basic_set_mode(CU_BRM_VERBOSE);
  	CU_basic_run_tests();
  	num_failures = CU_get_number_of_failures();
  	CU_cleanup_registry();
  
  	return num_failures;
  }
  