-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
- * All rights reserved.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+/* Security model
+ * --------------
+ * The vhost-user protocol connection is an external interface, so it must be
+ * robust against invalid inputs.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * This is important because the vhost-user master is only one step removed
+ * from the guest. Malicious guests that have escaped will then launch further
+ * attacks from the vhost-user master.
*
- * * 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.
+ * Even in deployments where guests are trusted, a bug in the vhost-user master
+ * can still cause invalid messages to be sent. Such messages must not
+ * compromise the stability of the DPDK application by causing crashes, memory
+ * corruption, or other problematic behavior.
*
- * 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.
+ * Do not assume received VhostUserMsg fields contain sensible values!
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/syscall.h>
#include <assert.h>
#ifdef RTE_LIBRTE_VHOST_NUMA
#include <numaif.h>
#endif
+#ifdef RTE_LIBRTE_VHOST_POSTCOPY
+#include <linux/userfaultfd.h>
+#endif
#include <rte_common.h>
#include <rte_malloc.h>
#include <rte_log.h>
+#include "iotlb.h"
#include "vhost.h"
#include "vhost_user.h"
+#define VIRTIO_MIN_MTU 68
+#define VIRTIO_MAX_MTU 65535
+
static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_NONE] = "VHOST_USER_NONE",
[VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
[VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
[VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
[VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
+ [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
+ [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
+ [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
+ [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
+ [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
+ [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
+ [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
+ [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
};
+static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
+static int read_vhost_message(int sockfd, struct VhostUserMsg *msg);
+
static uint64_t
get_blk_size(int fd)
{
free_mem_region(struct virtio_net *dev)
{
uint32_t i;
- struct virtio_memory_region *reg;
+ struct rte_vhost_mem_region *reg;
if (!dev || !dev->mem)
return;
rte_free(dev->mem);
dev->mem = NULL;
}
+
+ free(dev->guest_pages);
+ dev->guest_pages = NULL;
+
if (dev->log_addr) {
munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
dev->log_addr = 0;
}
+
+ if (dev->slave_req_fd >= 0) {
+ close(dev->slave_req_fd);
+ dev->slave_req_fd = -1;
+ }
+
+ if (dev->postcopy_ufd >= 0) {
+ close(dev->postcopy_ufd);
+ dev->postcopy_ufd = -1;
+ }
+
+ dev->postcopy_listening = 0;
}
/*
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg __rte_unused,
+ int main_fd __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ struct VhostUserMsg *msg __rte_unused,
+ int main_fd __rte_unused)
{
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
- }
+ struct virtio_net *dev = *pdev;
+ vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(void)
+static int
+vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = 0;
+
+ rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
+}
+
+/*
+ * The queue number that we support are requested.
+ */
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- return VHOST_FEATURES;
+ struct virtio_net *dev = *pdev;
+ uint32_t queue_num = 0;
+
+ rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- if (features & ~VHOST_FEATURES)
- return -1;
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
+ uint64_t vhost_features = 0;
+ struct rte_vdpa_device *vdpa_dev;
+ int did = -1;
+
+ rte_vhost_driver_get_features(dev->ifname, &vhost_features);
+ if (features & ~vhost_features) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) received invalid negotiated features.\n",
+ dev->vid);
+ return VH_RESULT_ERR;
+ }
+
+ if (dev->flags & VIRTIO_DEV_RUNNING) {
+ if (dev->features == features)
+ return VH_RESULT_OK;
+
+ /*
+ * Error out if master tries to change features while device is
+ * in running state. The exception being VHOST_F_LOG_ALL, which
+ * is enabled when the live-migration starts.
+ */
+ if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) features changed while device is running.\n",
+ dev->vid);
+ return VH_RESULT_ERR;
+ }
+
+ if (dev->notify_ops->features_changed)
+ dev->notify_ops->features_changed(dev->vid, features);
+ }
dev->features = features;
if (dev->features &
} else {
dev->vhost_hlen = sizeof(struct virtio_net_hdr);
}
- LOG_DEBUG(VHOST_CONFIG,
+ VHOST_LOG_DEBUG(VHOST_CONFIG,
"(%d) mergeable RX buffers %s, virtio 1 %s\n",
dev->vid,
(dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
- return 0;
+ if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
+ !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
+ /*
+ * Remove all but first queue pair if MQ hasn't been
+ * negotiated. This is safe because the device is not
+ * running at this stage.
+ */
+ while (dev->nr_vring > 2) {
+ struct vhost_virtqueue *vq;
+
+ vq = dev->virtqueue[--dev->nr_vring];
+ if (!vq)
+ continue;
+
+ dev->virtqueue[dev->nr_vring] = NULL;
+ cleanup_vq(vq, 1);
+ free_vq(dev, vq);
+ }
+ }
+
+ did = dev->vdpa_dev_id;
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (vdpa_dev && vdpa_dev->ops->set_features)
+ vdpa_dev->ops->set_features(dev->vid);
+
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
- struct vhost_vring_state *state)
+vhost_user_set_vring_num(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- struct vhost_virtqueue *vq = dev->virtqueue[state->index];
+ struct virtio_net *dev = *pdev;
+ struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
+
+ vq->size = msg->payload.state.num;
- vq->size = state->num;
+ /* VIRTIO 1.0, 2.4 Virtqueues says:
+ *
+ * Queue Size value is always a power of 2. The maximum Queue Size
+ * value is 32768.
+ */
+ if ((vq->size & (vq->size - 1)) || vq->size > 32768) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "invalid virtqueue size %u\n", vq->size);
+ return VH_RESULT_ERR;
+ }
if (dev->dequeue_zero_copy) {
vq->nr_zmbuf = 0;
"zero copy is force disabled\n");
dev->dequeue_zero_copy = 0;
}
+ TAILQ_INIT(&vq->zmbuf_list);
}
- vq->shadow_used_ring = rte_malloc(NULL,
+ if (vq_is_packed(dev)) {
+ vq->shadow_used_packed = rte_malloc(NULL,
+ vq->size *
+ sizeof(struct vring_used_elem_packed),
+ RTE_CACHE_LINE_SIZE);
+ if (!vq->shadow_used_packed) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to allocate memory for shadow used ring.\n");
+ return VH_RESULT_ERR;
+ }
+
+ } else {
+ vq->shadow_used_split = rte_malloc(NULL,
vq->size * sizeof(struct vring_used_elem),
RTE_CACHE_LINE_SIZE);
- if (!vq->shadow_used_ring) {
+ if (!vq->shadow_used_split) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to allocate memory for shadow used ring.\n");
+ return VH_RESULT_ERR;
+ }
+ }
+
+ vq->batch_copy_elems = rte_malloc(NULL,
+ vq->size * sizeof(struct batch_copy_elem),
+ RTE_CACHE_LINE_SIZE);
+ if (!vq->batch_copy_elems) {
RTE_LOG(ERR, VHOST_CONFIG,
- "failed to allocate memory for shadow used ring.\n");
- return -1;
+ "failed to allocate memory for batching copy.\n");
+ return VH_RESULT_ERR;
}
- return 0;
+ return VH_RESULT_OK;
}
/*
int oldnode, newnode;
struct virtio_net *old_dev;
struct vhost_virtqueue *old_vq, *vq;
+ struct zcopy_mbuf *new_zmbuf;
+ struct vring_used_elem *new_shadow_used_split;
+ struct vring_used_elem_packed *new_shadow_used_packed;
+ struct batch_copy_elem *new_batch_copy_elems;
int ret;
- /*
- * vq is allocated on pairs, we should try to do realloc
- * on first queue of one queue pair only.
- */
- if (index % VIRTIO_QNUM != 0)
- return dev;
-
old_dev = dev;
vq = old_vq = dev->virtqueue[index];
if (oldnode != newnode) {
RTE_LOG(INFO, VHOST_CONFIG,
"reallocate vq from %d to %d node\n", oldnode, newnode);
- vq = rte_malloc_socket(NULL, sizeof(*vq) * VIRTIO_QNUM, 0,
- newnode);
+ vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
if (!vq)
return dev;
- memcpy(vq, old_vq, sizeof(*vq) * VIRTIO_QNUM);
+ memcpy(vq, old_vq, sizeof(*vq));
+ TAILQ_INIT(&vq->zmbuf_list);
+
+ if (dev->dequeue_zero_copy) {
+ new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size *
+ sizeof(struct zcopy_mbuf), 0, newnode);
+ if (new_zmbuf) {
+ rte_free(vq->zmbufs);
+ vq->zmbufs = new_zmbuf;
+ }
+ }
+
+ if (vq_is_packed(dev)) {
+ new_shadow_used_packed = rte_malloc_socket(NULL,
+ vq->size *
+ sizeof(struct vring_used_elem_packed),
+ RTE_CACHE_LINE_SIZE,
+ newnode);
+ if (new_shadow_used_packed) {
+ rte_free(vq->shadow_used_packed);
+ vq->shadow_used_packed = new_shadow_used_packed;
+ }
+ } else {
+ new_shadow_used_split = rte_malloc_socket(NULL,
+ vq->size *
+ sizeof(struct vring_used_elem),
+ RTE_CACHE_LINE_SIZE,
+ newnode);
+ if (new_shadow_used_split) {
+ rte_free(vq->shadow_used_split);
+ vq->shadow_used_split = new_shadow_used_split;
+ }
+ }
+
+ new_batch_copy_elems = rte_malloc_socket(NULL,
+ vq->size * sizeof(struct batch_copy_elem),
+ RTE_CACHE_LINE_SIZE,
+ newnode);
+ if (new_batch_copy_elems) {
+ rte_free(vq->batch_copy_elems);
+ vq->batch_copy_elems = new_batch_copy_elems;
+ }
+
rte_free(old_vq);
}
out:
dev->virtqueue[index] = vq;
- dev->virtqueue[index + 1] = vq + 1;
vhost_devices[dev->vid] = dev;
+ if (old_vq != vq)
+ vhost_user_iotlb_init(dev, index);
+
return dev;
}
#else
}
#endif
-/*
- * Converts QEMU virtual address to Vhost virtual address. This function is
- * used to convert the ring addresses to our address space.
- */
+/* Converts QEMU virtual address to Vhost virtual address. */
static uint64_t
-qva_to_vva(struct virtio_net *dev, uint64_t qva)
+qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
{
- struct virtio_memory_region *reg;
+ struct rte_vhost_mem_region *r;
uint32_t i;
/* Find the region where the address lives. */
for (i = 0; i < dev->mem->nregions; i++) {
- reg = &dev->mem->regions[i];
+ r = &dev->mem->regions[i];
- if (qva >= reg->guest_user_addr &&
- qva < reg->guest_user_addr + reg->size) {
- return qva - reg->guest_user_addr +
- reg->host_user_addr;
+ if (qva >= r->guest_user_addr &&
+ qva < r->guest_user_addr + r->size) {
+
+ if (unlikely(*len > r->guest_user_addr + r->size - qva))
+ *len = r->guest_user_addr + r->size - qva;
+
+ return qva - r->guest_user_addr +
+ r->host_user_addr;
}
}
+ *len = 0;
return 0;
}
+
/*
- * The virtio device sends us the desc, used and avail ring addresses.
- * This function then converts these to our address space.
+ * Converts ring address to Vhost virtual address.
+ * If IOMMU is enabled, the ring address is a guest IO virtual address,
+ * else it is a QEMU virtual address.
*/
-static int
-vhost_user_set_vring_addr(struct virtio_net *dev, struct vhost_vring_addr *addr)
+static uint64_t
+ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t ra, uint64_t *size)
{
- struct vhost_virtqueue *vq;
+ if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
+ uint64_t vva;
- if (dev->mem == NULL)
- return -1;
+ vva = vhost_user_iotlb_cache_find(vq, ra,
+ size, VHOST_ACCESS_RW);
+ if (!vva)
+ vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
- /* addr->index refers to the queue index. The txq 1, rxq is 0. */
- vq = dev->virtqueue[addr->index];
+ return vva;
+ }
+
+ return qva_to_vva(dev, ra, size);
+}
+
+static struct virtio_net *
+translate_ring_addresses(struct virtio_net *dev, int vq_index)
+{
+ struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
+ struct vhost_vring_addr *addr = &vq->ring_addrs;
+ uint64_t len;
+
+ if (vq_is_packed(dev)) {
+ len = sizeof(struct vring_packed_desc) * vq->size;
+ vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
+ ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
+ vq->log_guest_addr = 0;
+ if (vq->desc_packed == NULL ||
+ len != sizeof(struct vring_packed_desc) *
+ vq->size) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to map desc_packed ring.\n",
+ dev->vid);
+ return dev;
+ }
+
+ dev = numa_realloc(dev, vq_index);
+ vq = dev->virtqueue[vq_index];
+ addr = &vq->ring_addrs;
+
+ len = sizeof(struct vring_packed_desc_event);
+ vq->driver_event = (struct vring_packed_desc_event *)
+ (uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->avail_user_addr, &len);
+ if (vq->driver_event == NULL ||
+ len != sizeof(struct vring_packed_desc_event)) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to find driver area address.\n",
+ dev->vid);
+ return dev;
+ }
+
+ len = sizeof(struct vring_packed_desc_event);
+ vq->device_event = (struct vring_packed_desc_event *)
+ (uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->used_user_addr, &len);
+ if (vq->device_event == NULL ||
+ len != sizeof(struct vring_packed_desc_event)) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to find device area address.\n",
+ dev->vid);
+ return dev;
+ }
+
+ return dev;
+ }
/* The addresses are converted from QEMU virtual to Vhost virtual. */
- vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
- addr->desc_user_addr);
- if (vq->desc == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find desc ring address.\n",
+ if (vq->desc && vq->avail && vq->used)
+ return dev;
+
+ len = sizeof(struct vring_desc) * vq->size;
+ vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->desc_user_addr, &len);
+ if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to map desc ring.\n",
dev->vid);
- return -1;
+ return dev;
}
- dev = numa_realloc(dev, addr->index);
- vq = dev->virtqueue[addr->index];
-
- vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
- addr->avail_user_addr);
- if (vq->avail == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find avail ring address.\n",
+ dev = numa_realloc(dev, vq_index);
+ vq = dev->virtqueue[vq_index];
+ addr = &vq->ring_addrs;
+
+ len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
+ vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->avail_user_addr, &len);
+ if (vq->avail == 0 ||
+ len != sizeof(struct vring_avail) +
+ sizeof(uint16_t) * vq->size) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to map avail ring.\n",
dev->vid);
- return -1;
+ return dev;
}
- vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
- addr->used_user_addr);
- if (vq->used == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find used ring address.\n",
+ len = sizeof(struct vring_used) +
+ sizeof(struct vring_used_elem) * vq->size;
+ vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
+ vq, addr->used_user_addr, &len);
+ if (vq->used == 0 || len != sizeof(struct vring_used) +
+ sizeof(struct vring_used_elem) * vq->size) {
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "(%d) failed to map used ring.\n",
dev->vid);
- return -1;
+ return dev;
}
if (vq->last_used_idx != vq->used->idx) {
vq->log_guest_addr = addr->log_guest_addr;
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
+ VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
dev->vid, vq->desc);
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
+ VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
dev->vid, vq->avail);
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
+ VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
dev->vid, vq->used);
- LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
+ VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
dev->vid, vq->log_guest_addr);
- return 0;
+ return dev;
+}
+
+/*
+ * The virtio device sends us the desc, used and avail ring addresses.
+ * This function then converts these to our address space.
+ */
+static int
+vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ struct vhost_virtqueue *vq;
+ struct vhost_vring_addr *addr = &msg->payload.addr;
+
+ if (dev->mem == NULL)
+ return VH_RESULT_ERR;
+
+ /* addr->index refers to the queue index. The txq 1, rxq is 0. */
+ vq = dev->virtqueue[msg->payload.addr.index];
+
+ /*
+ * Rings addresses should not be interpreted as long as the ring is not
+ * started and enabled
+ */
+ memcpy(&vq->ring_addrs, addr, sizeof(*addr));
+
+ vring_invalidate(dev, vq);
+
+ if (vq->enabled && (dev->features &
+ (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
+ dev = translate_ring_addresses(dev, msg->payload.addr.index);
+ if (!dev)
+ return VH_RESULT_ERR;
+
+ *pdev = dev;
+ }
+
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the available ring last used index.
*/
static int
-vhost_user_set_vring_base(struct virtio_net *dev,
- struct vhost_vring_state *state)
+vhost_user_set_vring_base(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- dev->virtqueue[state->index]->last_used_idx = state->num;
- dev->virtqueue[state->index]->last_avail_idx = state->num;
+ struct virtio_net *dev = *pdev;
+ struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
+ uint64_t val = msg->payload.state.num;
+
+ if (vq_is_packed(dev)) {
+ /*
+ * Bit[0:14]: avail index
+ * Bit[15]: avail wrap counter
+ */
+ vq->last_avail_idx = val & 0x7fff;
+ vq->avail_wrap_counter = !!(val & (0x1 << 15));
+ /*
+ * Set used index to same value as available one, as
+ * their values should be the same since ring processing
+ * was stopped at get time.
+ */
+ vq->last_used_idx = vq->last_avail_idx;
+ vq->used_wrap_counter = vq->avail_wrap_counter;
+ } else {
+ vq->last_used_idx = msg->payload.state.num;
+ vq->last_avail_idx = msg->payload.state.num;
+ }
- return 0;
+ return VH_RESULT_OK;
}
-static void
+static int
add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
uint64_t host_phys_addr, uint64_t size)
{
dev->max_guest_pages *= 2;
dev->guest_pages = realloc(dev->guest_pages,
dev->max_guest_pages * sizeof(*page));
+ if (!dev->guest_pages) {
+ RTE_LOG(ERR, VHOST_CONFIG, "cannot realloc guest_pages\n");
+ return -1;
+ }
}
if (dev->nr_guest_pages > 0) {
if (host_phys_addr == last_page->host_phys_addr +
last_page->size) {
last_page->size += size;
- return;
+ return 0;
}
}
page->guest_phys_addr = guest_phys_addr;
page->host_phys_addr = host_phys_addr;
page->size = size;
+
+ return 0;
}
-static void
-add_guest_pages(struct virtio_net *dev, struct virtio_memory_region *reg,
+static int
+add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
uint64_t page_size)
{
uint64_t reg_size = reg->size;
uint64_t host_phys_addr;
uint64_t size;
- host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)host_user_addr);
+ host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
size = page_size - (guest_phys_addr & (page_size - 1));
size = RTE_MIN(size, reg_size);
- add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+ if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
+ return -1;
+
host_user_addr += size;
guest_phys_addr += size;
reg_size -= size;
while (reg_size > 0) {
size = RTE_MIN(reg_size, page_size);
- host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)
+ host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
host_user_addr);
- add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+ if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
+ size) < 0)
+ return -1;
host_user_addr += size;
guest_phys_addr += size;
reg_size -= size;
}
+
+ return 0;
}
#ifdef RTE_LIBRTE_VHOST_DEBUG
#define dump_guest_pages(dev)
#endif
+static bool
+vhost_memory_changed(struct VhostUserMemory *new,
+ struct rte_vhost_memory *old)
+{
+ uint32_t i;
+
+ if (new->nregions != old->nregions)
+ return true;
+
+ for (i = 0; i < new->nregions; ++i) {
+ VhostUserMemoryRegion *new_r = &new->regions[i];
+ struct rte_vhost_mem_region *old_r = &old->regions[i];
+
+ if (new_r->guest_phys_addr != old_r->guest_phys_addr)
+ return true;
+ if (new_r->memory_size != old_r->size)
+ return true;
+ if (new_r->userspace_addr != old_r->guest_user_addr)
+ return true;
+ }
+
+ return false;
+}
+
static int
-vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd)
{
- struct VhostUserMemory memory = pmsg->payload.memory;
- struct virtio_memory_region *reg;
+ struct virtio_net *dev = *pdev;
+ struct VhostUserMemory *memory = &msg->payload.memory;
+ struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
uint64_t mmap_offset;
uint64_t alignment;
uint32_t i;
+ int populate;
int fd;
- /* Remove from the data plane. */
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
+ if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "too many memory regions (%u)\n", memory->nregions);
+ return VH_RESULT_ERR;
+ }
+
+ if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "(%d) memory regions not changed\n", dev->vid);
+
+ for (i = 0; i < memory->nregions; i++)
+ close(msg->fds[i]);
+
+ return VH_RESULT_OK;
}
if (dev->mem) {
dev->mem = NULL;
}
+ /* Flush IOTLB cache as previous HVAs are now invalid */
+ if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
+ for (i = 0; i < dev->nr_vring; i++)
+ vhost_user_iotlb_flush_all(dev->virtqueue[i]);
+
dev->nr_guest_pages = 0;
if (!dev->guest_pages) {
dev->max_guest_pages = 8;
dev->guest_pages = malloc(dev->max_guest_pages *
sizeof(struct guest_page));
+ if (dev->guest_pages == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) failed to allocate memory "
+ "for dev->guest_pages\n",
+ dev->vid);
+ return VH_RESULT_ERR;
+ }
}
- dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct virtio_memory) +
- sizeof(struct virtio_memory_region) * memory.nregions, 0);
+ dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
+ sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
if (dev->mem == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) failed to allocate memory for dev->mem\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
- dev->mem->nregions = memory.nregions;
+ dev->mem->nregions = memory->nregions;
- for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ for (i = 0; i < memory->nregions; i++) {
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
- reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
- reg->guest_user_addr = memory.regions[i].userspace_addr;
- reg->size = memory.regions[i].memory_size;
+ reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
+ reg->guest_user_addr = memory->regions[i].userspace_addr;
+ reg->size = memory->regions[i].memory_size;
reg->fd = fd;
- mmap_offset = memory.regions[i].mmap_offset;
- mmap_size = reg->size + mmap_offset;
+ mmap_offset = memory->regions[i].mmap_offset;
+
+ /* Check for memory_size + mmap_offset overflow */
+ if (mmap_offset >= -reg->size) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "mmap_offset (%#"PRIx64") and memory_size "
+ "(%#"PRIx64") overflow\n",
+ mmap_offset, reg->size);
+ goto err_mmap;
+ }
+
+ mmap_size = reg->size + mmap_offset;
/* mmap() without flag of MAP_ANONYMOUS, should be called
* with length argument aligned with hugepagesz at older
}
mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
+ populate = (dev->dequeue_zero_copy) ? MAP_POPULATE : 0;
mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_POPULATE, fd, 0);
+ MAP_SHARED | populate, fd, 0);
if (mmap_addr == MAP_FAILED) {
RTE_LOG(ERR, VHOST_CONFIG,
mmap_offset;
if (dev->dequeue_zero_copy)
- add_guest_pages(dev, reg, alignment);
+ if (add_guest_pages(dev, reg, alignment) < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "adding guest pages to region %u failed.\n",
+ i);
+ goto err_mmap;
+ }
RTE_LOG(INFO, VHOST_CONFIG,
"guest memory region %u, size: 0x%" PRIx64 "\n"
mmap_size,
alignment,
mmap_offset);
+
+ if (dev->postcopy_listening) {
+ /*
+ * We haven't a better way right now than sharing
+ * DPDK's virtual address with Qemu, so that Qemu can
+ * retrieve the region offset when handling userfaults.
+ */
+ memory->regions[i].userspace_addr =
+ reg->host_user_addr;
+ }
+ }
+ if (dev->postcopy_listening) {
+ /* Send the addresses back to qemu */
+ msg->fd_num = 0;
+ send_vhost_reply(main_fd, msg);
+
+ /* Wait for qemu to acknolwedge it's got the addresses
+ * we've got to wait before we're allowed to generate faults.
+ */
+ VhostUserMsg ack_msg;
+ if (read_vhost_message(main_fd, &ack_msg) <= 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to read qemu ack on postcopy set-mem-table\n");
+ goto err_mmap;
+ }
+ if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Bad qemu ack on postcopy set-mem-table (%d)\n",
+ ack_msg.request.master);
+ goto err_mmap;
+ }
+
+ /* Now userfault register and we can use the memory */
+ for (i = 0; i < memory->nregions; i++) {
+#ifdef RTE_LIBRTE_VHOST_POSTCOPY
+ reg = &dev->mem->regions[i];
+ struct uffdio_register reg_struct;
+
+ /*
+ * Let's register all the mmap'ed area to ensure
+ * alignment on page boundary.
+ */
+ reg_struct.range.start =
+ (uint64_t)(uintptr_t)reg->mmap_addr;
+ reg_struct.range.len = reg->mmap_size;
+ reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
+
+ if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
+ ®_struct)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to register ufd for region %d: (ufd = %d) %s\n",
+ i, dev->postcopy_ufd,
+ strerror(errno));
+ goto err_mmap;
+ }
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "\t userfaultfd registered for range : %llx - %llx\n",
+ reg_struct.range.start,
+ reg_struct.range.start +
+ reg_struct.range.len - 1);
+#else
+ goto err_mmap;
+#endif
+ }
+ }
+
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ if (vq->desc || vq->avail || vq->used) {
+ /*
+ * If the memory table got updated, the ring addresses
+ * need to be translated again as virtual addresses have
+ * changed.
+ */
+ vring_invalidate(dev, vq);
+
+ dev = translate_ring_addresses(dev, i);
+ if (!dev) {
+ dev = *pdev;
+ goto err_mmap;
+ }
+
+ *pdev = dev;
+ }
}
dump_guest_pages(dev);
- return 0;
+ return VH_RESULT_OK;
err_mmap:
free_mem_region(dev);
rte_free(dev->mem);
dev->mem = NULL;
- return -1;
+ return VH_RESULT_ERR;
}
-static int
-vq_is_ready(struct vhost_virtqueue *vq)
+static bool
+vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
{
- return vq && vq->desc &&
+ bool rings_ok;
+
+ if (!vq)
+ return false;
+
+ if (vq_is_packed(dev))
+ rings_ok = !!vq->desc_packed;
+ else
+ rings_ok = vq->desc && vq->avail && vq->used;
+
+ return rings_ok &&
vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
}
static int
virtio_is_ready(struct virtio_net *dev)
{
- struct vhost_virtqueue *rvq, *tvq;
+ struct vhost_virtqueue *vq;
uint32_t i;
- for (i = 0; i < dev->virt_qp_nb; i++) {
- rvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ];
- tvq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ];
+ if (dev->nr_vring == 0)
+ return 0;
- if (!vq_is_ready(rvq) || !vq_is_ready(tvq)) {
- RTE_LOG(INFO, VHOST_CONFIG,
- "virtio is not ready for processing.\n");
+ for (i = 0; i < dev->nr_vring; i++) {
+ vq = dev->virtqueue[i];
+
+ if (!vq_is_ready(dev, vq))
return 0;
- }
}
RTE_LOG(INFO, VHOST_CONFIG,
return 1;
}
-static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+static int
+vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
+ struct virtio_net *dev = *pdev;
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- uint32_t cur_qp_idx;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
- /*
- * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
- * we get, so we do vring queue pair allocation here.
- */
- cur_qp_idx = file.index / VIRTIO_QNUM;
- if (cur_qp_idx + 1 > dev->virt_qp_nb) {
- if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
- return;
- }
-
vq = dev->virtqueue[file.index];
- assert(vq != NULL);
-
if (vq->callfd >= 0)
close(vq->callfd);
vq->callfd = file.fd;
+
+ return VH_RESULT_OK;
}
-/*
- * In vhost-user, when we receive kick message, will test whether virtio
- * device is ready for packet processing.
- */
-static void
-vhost_user_set_vring_kick(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
+ struct virtio_net *dev = *pdev;
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
+ /* Interpret ring addresses only when ring is started. */
+ dev = translate_ring_addresses(dev, file.index);
+ if (!dev)
+ return VH_RESULT_ERR;
+
+ *pdev = dev;
+
vq = dev->virtqueue[file.index];
+
+ /*
+ * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
+ * the ring starts already enabled. Otherwise, it is enabled via
+ * the SET_VRING_ENABLE message.
+ */
+ if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
+ vq->enabled = 1;
+
if (vq->kickfd >= 0)
close(vq->kickfd);
vq->kickfd = file.fd;
- if (virtio_is_ready(dev) && !(dev->flags & VIRTIO_DEV_RUNNING)) {
- if (dev->dequeue_zero_copy) {
- RTE_LOG(INFO, VHOST_CONFIG,
- "dequeue zero copy is enabled\n");
- }
-
- if (notify_ops->new_device(dev->vid) == 0)
- dev->flags |= VIRTIO_DEV_RUNNING;
- }
+ return VH_RESULT_OK;
}
static void
* when virtio is stopped, qemu will send us the GET_VRING_BASE message.
*/
static int
-vhost_user_get_vring_base(struct virtio_net *dev,
- struct vhost_vring_state *state)
+vhost_user_get_vring_base(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- struct vhost_virtqueue *vq = dev->virtqueue[state->index];
+ struct virtio_net *dev = *pdev;
+ struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
+ uint64_t val;
/* We have to stop the queue (virtio) if it is running. */
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(dev->vid);
- }
+ vhost_destroy_device_notify(dev);
- /* Here we are safe to get the last used index */
- state->num = vq->last_used_idx;
+ dev->flags &= ~VIRTIO_DEV_READY;
+ dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
- RTE_LOG(INFO, VHOST_CONFIG,
- "vring base idx:%d file:%d\n", state->index, state->num);
- /*
- * Based on current qemu vhost-user implementation, this message is
+ /* Here we are safe to get the indexes */
+ if (vq_is_packed(dev)) {
+ /*
+ * Bit[0:14]: avail index
+ * Bit[15]: avail wrap counter
+ */
+ val = vq->last_avail_idx & 0x7fff;
+ val |= vq->avail_wrap_counter << 15;
+ msg->payload.state.num = val;
+ } else {
+ msg->payload.state.num = vq->last_avail_idx;
+ }
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "vring base idx:%d file:%d\n", msg->payload.state.index,
+ msg->payload.state.num);
+ /*
+ * Based on current qemu vhost-user implementation, this message is
* sent and only sent in vhost_vring_stop.
* TODO: cleanup the vring, it isn't usable since here.
*/
vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
+ if (vq->callfd >= 0)
+ close(vq->callfd);
+
+ vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
+
if (dev->dequeue_zero_copy)
free_zmbufs(vq);
- rte_free(vq->shadow_used_ring);
- vq->shadow_used_ring = NULL;
+ if (vq_is_packed(dev)) {
+ rte_free(vq->shadow_used_packed);
+ vq->shadow_used_packed = NULL;
+ } else {
+ rte_free(vq->shadow_used_split);
+ vq->shadow_used_split = NULL;
+ }
- return 0;
+ rte_free(vq->batch_copy_elems);
+ vq->batch_copy_elems = NULL;
+
+ msg->size = sizeof(msg->payload.state);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
}
/*
* enable the virtio queue pair.
*/
static int
-vhost_user_set_vring_enable(struct virtio_net *dev,
- struct vhost_vring_state *state)
+vhost_user_set_vring_enable(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- int enable = (int)state->num;
+ struct virtio_net *dev = *pdev;
+ int enable = (int)msg->payload.state.num;
+ int index = (int)msg->payload.state.index;
+ struct rte_vdpa_device *vdpa_dev;
+ int did = -1;
RTE_LOG(INFO, VHOST_CONFIG,
"set queue enable: %d to qp idx: %d\n",
- enable, state->index);
+ enable, index);
- if (notify_ops->vring_state_changed)
- notify_ops->vring_state_changed(dev->vid, state->index, enable);
+ did = dev->vdpa_dev_id;
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (vdpa_dev && vdpa_dev->ops->set_vring_state)
+ vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
- dev->virtqueue[state->index]->enabled = enable;
+ if (dev->notify_ops->vring_state_changed)
+ dev->notify_ops->vring_state_changed(dev->vid,
+ index, enable);
- return 0;
+ dev->virtqueue[index]->enabled = enable;
+
+ return VH_RESULT_OK;
}
-static void
-vhost_user_set_protocol_features(struct virtio_net *dev,
- uint64_t protocol_features)
+static int
+vhost_user_get_protocol_features(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
- if (protocol_features & ~VHOST_USER_PROTOCOL_FEATURES)
- return;
+ struct virtio_net *dev = *pdev;
+ uint64_t features, protocol_features;
+
+ rte_vhost_driver_get_features(dev->ifname, &features);
+ rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
+
+ /*
+ * REPLY_ACK protocol feature is only mandatory for now
+ * for IOMMU feature. If IOMMU is explicitly disabled by the
+ * application, disable also REPLY_ACK feature for older buggy
+ * Qemu versions (from v2.7.0 to v2.9.0).
+ */
+ if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
+ protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK);
+
+ msg->payload.u64 = protocol_features;
+ msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
+}
+
+static int
+vhost_user_set_protocol_features(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ uint64_t protocol_features = msg->payload.u64;
+ uint64_t slave_protocol_features = 0;
+
+ rte_vhost_driver_get_protocol_features(dev->ifname,
+ &slave_protocol_features);
+ if (protocol_features & ~slave_protocol_features) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) received invalid protocol features.\n",
+ dev->vid);
+ return VH_RESULT_ERR;
+ }
dev->protocol_features = protocol_features;
+
+ return VH_RESULT_OK;
}
static int
-vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
+ struct virtio_net *dev = *pdev;
int fd = msg->fds[0];
uint64_t size, off;
void *addr;
if (fd < 0) {
RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
- return -1;
+ return VH_RESULT_ERR;
}
if (msg->size != sizeof(VhostUserLog)) {
RTE_LOG(ERR, VHOST_CONFIG,
"invalid log base msg size: %"PRId32" != %d\n",
msg->size, (int)sizeof(VhostUserLog));
- return -1;
+ return VH_RESULT_ERR;
}
size = msg->payload.log.mmap_size;
off = msg->payload.log.mmap_offset;
+
+ /* Don't allow mmap_offset to point outside the mmap region */
+ if (off > size) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "log offset %#"PRIx64" exceeds log size %#"PRIx64"\n",
+ off, size);
+ return VH_RESULT_ERR;
+ }
+
RTE_LOG(INFO, VHOST_CONFIG,
"log mmap size: %"PRId64", offset: %"PRId64"\n",
size, off);
* mmap from 0 to workaround a hugepage mmap bug: mmap will
* fail when offset is not page size aligned.
*/
- addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
close(fd);
if (addr == MAP_FAILED) {
RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
- return -1;
+ return VH_RESULT_ERR;
}
/*
dev->log_base = dev->log_addr + off;
dev->log_size = size;
- return 0;
+ /*
+ * The spec is not clear about it (yet), but QEMU doesn't expect
+ * any payload in the reply.
+ */
+ msg->size = 0;
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
+}
+
+static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+
+ return VH_RESULT_OK;
}
/*
* a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
*/
static int
-vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
{
+ struct virtio_net *dev = *pdev;
uint8_t *mac = (uint8_t *)&msg->payload.u64;
+ struct rte_vdpa_device *vdpa_dev;
+ int did = -1;
RTE_LOG(DEBUG, VHOST_CONFIG,
":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
*/
rte_smp_wmb();
rte_atomic16_set(&dev->broadcast_rarp, 1);
+ did = dev->vdpa_dev_id;
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (vdpa_dev && vdpa_dev->ops->migration_done)
+ vdpa_dev->ops->migration_done(dev->vid);
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ if (msg->payload.u64 < VIRTIO_MIN_MTU ||
+ msg->payload.u64 > VIRTIO_MAX_MTU) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
+ msg->payload.u64);
+
+ return VH_RESULT_ERR;
+ }
+
+ dev->mtu = msg->payload.u64;
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ int fd = msg->fds[0];
+
+ if (fd < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Invalid file descriptor for slave channel (%d)\n",
+ fd);
+ return VH_RESULT_ERR;
+ }
+
+ dev->slave_req_fd = fd;
+
+ return VH_RESULT_OK;
+}
+
+static int
+is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
+{
+ struct vhost_vring_addr *ra;
+ uint64_t start, end;
+
+ start = imsg->iova;
+ end = start + imsg->size;
+
+ ra = &vq->ring_addrs;
+ if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
+ return 1;
+ if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
+ return 1;
+ if (ra->used_user_addr >= start && ra->used_user_addr < end)
+ return 1;
return 0;
}
+static int
+is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
+ struct vhost_iotlb_msg *imsg)
+{
+ uint64_t istart, iend, vstart, vend;
+
+ istart = imsg->iova;
+ iend = istart + imsg->size - 1;
+
+ vstart = (uintptr_t)vq->desc;
+ vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->avail;
+ vend = vstart + sizeof(struct vring_avail);
+ vend += sizeof(uint16_t) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->used;
+ vend = vstart + sizeof(struct vring_used);
+ vend += sizeof(struct vring_used_elem) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ return 0;
+}
+
+static int
+vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
+ uint16_t i;
+ uint64_t vva, len;
+
+ switch (imsg->type) {
+ case VHOST_IOTLB_UPDATE:
+ len = imsg->size;
+ vva = qva_to_vva(dev, imsg->uaddr, &len);
+ if (!vva)
+ return VH_RESULT_ERR;
+
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
+ len, imsg->perm);
+
+ if (is_vring_iotlb_update(vq, imsg))
+ *pdev = dev = translate_ring_addresses(dev, i);
+ }
+ break;
+ case VHOST_IOTLB_INVALIDATE:
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_remove(vq, imsg->iova,
+ imsg->size);
+
+ if (is_vring_iotlb_invalidate(vq, imsg))
+ vring_invalidate(dev, vq);
+ }
+ break;
+ default:
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
+ imsg->type);
+ return VH_RESULT_ERR;
+ }
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_set_postcopy_advise(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+#ifdef RTE_LIBRTE_VHOST_POSTCOPY
+ struct uffdio_api api_struct;
+
+ dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
+
+ if (dev->postcopy_ufd == -1) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Userfaultfd not available: %s\n",
+ strerror(errno));
+ return VH_RESULT_ERR;
+ }
+ api_struct.api = UFFD_API;
+ api_struct.features = 0;
+ if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
+ RTE_LOG(ERR, VHOST_CONFIG, "UFFDIO_API ioctl failure: %s\n",
+ strerror(errno));
+ close(dev->postcopy_ufd);
+ dev->postcopy_ufd = -1;
+ return VH_RESULT_ERR;
+ }
+ msg->fds[0] = dev->postcopy_ufd;
+ msg->fd_num = 1;
+
+ return VH_RESULT_REPLY;
+#else
+ dev->postcopy_ufd = -1;
+ msg->fd_num = 0;
+
+ return VH_RESULT_ERR;
+#endif
+}
+
+static int
+vhost_user_set_postcopy_listen(struct virtio_net **pdev,
+ struct VhostUserMsg *msg __rte_unused,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+
+ if (dev->mem && dev->mem->nregions) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Regions already registered at postcopy-listen\n");
+ return VH_RESULT_ERR;
+ }
+ dev->postcopy_listening = 1;
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+
+ dev->postcopy_listening = 0;
+ if (dev->postcopy_ufd >= 0) {
+ close(dev->postcopy_ufd);
+ dev->postcopy_ufd = -1;
+ }
+
+ msg->payload.u64 = 0;
+ msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
+}
+
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+ [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
+ [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
+ [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
int ret;
ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
- msg->fds, VHOST_MEMORY_MAX_NREGIONS);
+ msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
if (ret <= 0)
return ret;
static int
send_vhost_message(int sockfd, struct VhostUserMsg *msg)
{
- int ret;
+ if (!msg)
+ return 0;
+
+ return send_fd_message(sockfd, (char *)msg,
+ VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
+}
+static int
+send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
+{
if (!msg)
return 0;
msg->flags &= ~VHOST_USER_VERSION_MASK;
+ msg->flags &= ~VHOST_USER_NEED_REPLY;
msg->flags |= VHOST_USER_VERSION;
msg->flags |= VHOST_USER_REPLY_MASK;
- ret = send_fd_message(sockfd, (char *)msg,
- VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
+ return send_vhost_message(sockfd, msg);
+}
+
+static int
+send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
+{
+ int ret;
+
+ if (msg->flags & VHOST_USER_NEED_REPLY)
+ rte_spinlock_lock(&dev->slave_req_lock);
+
+ ret = send_vhost_message(dev->slave_req_fd, msg);
+ if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
+ rte_spinlock_unlock(&dev->slave_req_lock);
return ret;
}
+/*
+ * Allocate a queue pair if it hasn't been allocated yet
+ */
+static int
+vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
+ struct VhostUserMsg *msg)
+{
+ uint16_t vring_idx;
+
+ switch (msg->request.master) {
+ case VHOST_USER_SET_VRING_KICK:
+ case VHOST_USER_SET_VRING_CALL:
+ case VHOST_USER_SET_VRING_ERR:
+ vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ break;
+ case VHOST_USER_SET_VRING_NUM:
+ case VHOST_USER_SET_VRING_BASE:
+ case VHOST_USER_SET_VRING_ENABLE:
+ vring_idx = msg->payload.state.index;
+ break;
+ case VHOST_USER_SET_VRING_ADDR:
+ vring_idx = msg->payload.addr.index;
+ break;
+ default:
+ return 0;
+ }
+
+ if (vring_idx >= VHOST_MAX_VRING) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "invalid vring index: %u\n", vring_idx);
+ return -1;
+ }
+
+ if (dev->virtqueue[vring_idx])
+ return 0;
+
+ return alloc_vring_queue(dev, vring_idx);
+}
+
+static void
+vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
+{
+ unsigned int i = 0;
+ unsigned int vq_num = 0;
+
+ while (vq_num < dev->nr_vring) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ if (vq) {
+ rte_spinlock_lock(&vq->access_lock);
+ vq_num++;
+ }
+ i++;
+ }
+}
+
+static void
+vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
+{
+ unsigned int i = 0;
+ unsigned int vq_num = 0;
+
+ while (vq_num < dev->nr_vring) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ if (vq) {
+ rte_spinlock_unlock(&vq->access_lock);
+ vq_num++;
+ }
+ i++;
+ }
+}
+
int
vhost_user_msg_handler(int vid, int fd)
{
struct virtio_net *dev;
struct VhostUserMsg msg;
+ struct rte_vdpa_device *vdpa_dev;
+ int did = -1;
int ret;
+ int unlock_required = 0;
+ uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
return -1;
+ if (!dev->notify_ops) {
+ dev->notify_ops = vhost_driver_callback_get(dev->ifname);
+ if (!dev->notify_ops) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to get callback ops for driver %s\n",
+ dev->ifname);
+ return -1;
+ }
+ }
+
ret = read_vhost_message(fd, &msg);
- if (ret <= 0 || msg.request >= VHOST_USER_MAX) {
+ if (ret <= 0 || msg.request.master >= VHOST_USER_MAX) {
if (ret < 0)
RTE_LOG(ERR, VHOST_CONFIG,
"vhost read message failed\n");
return -1;
}
- RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
- vhost_message_str[msg.request]);
- switch (msg.request) {
- case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features();
- msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- vhost_user_set_features(dev, msg.payload.u64);
- break;
+ ret = 0;
+ if (msg.request.master != VHOST_USER_IOTLB_MSG)
+ RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
+ vhost_message_str[msg.request.master]);
+ else
+ RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
+ vhost_message_str[msg.request.master]);
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- msg.payload.u64 = VHOST_USER_PROTOCOL_FEATURES;
- msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- vhost_user_set_protocol_features(dev, msg.payload.u64);
- break;
+ ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to alloc queue\n");
+ return -1;
+ }
+ /*
+ * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
+ * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
+ * and device is destroyed. destroy_device waits for queues to be
+ * inactive, so it is safe. Otherwise taking the access_lock
+ * would cause a dead lock.
+ */
+ switch (msg.request.master) {
+ case VHOST_USER_SET_FEATURES:
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
case VHOST_USER_SET_OWNER:
- vhost_user_set_owner();
- break;
- case VHOST_USER_RESET_OWNER:
- vhost_user_reset_owner(dev);
- break;
-
case VHOST_USER_SET_MEM_TABLE:
- vhost_user_set_mem_table(dev, &msg);
- break;
-
case VHOST_USER_SET_LOG_BASE:
- vhost_user_set_log_base(dev, &msg);
-
- /* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
- break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
- break;
-
case VHOST_USER_SET_VRING_NUM:
- vhost_user_set_vring_num(dev, &msg.payload.state);
- break;
case VHOST_USER_SET_VRING_ADDR:
- vhost_user_set_vring_addr(dev, &msg.payload.addr);
- break;
case VHOST_USER_SET_VRING_BASE:
- vhost_user_set_vring_base(dev, &msg.payload.state);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(dev, &msg.payload.state);
- msg.size = sizeof(msg.payload.state);
- send_vhost_message(fd, &msg);
- break;
-
case VHOST_USER_SET_VRING_KICK:
- vhost_user_set_vring_kick(dev, &msg);
- break;
case VHOST_USER_SET_VRING_CALL:
- vhost_user_set_vring_call(dev, &msg);
- break;
-
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
- break;
-
- case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = VHOST_MAX_QUEUE_PAIRS;
- msg.size = sizeof(msg.payload.u64);
- send_vhost_message(fd, &msg);
- break;
-
case VHOST_USER_SET_VRING_ENABLE:
- vhost_user_set_vring_enable(dev, &msg.payload.state);
- break;
case VHOST_USER_SEND_RARP:
- vhost_user_send_rarp(dev, &msg);
+ case VHOST_USER_NET_SET_MTU:
+ case VHOST_USER_SET_SLAVE_REQ_FD:
+ vhost_user_lock_all_queue_pairs(dev);
+ unlock_required = 1;
break;
-
default:
break;
}
+ if (dev->extern_ops.pre_msg_handle) {
+ ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
+ (void *)&msg, &skip_master);
+ if (ret == VH_RESULT_ERR)
+ goto skip_to_reply;
+ else if (ret == VH_RESULT_REPLY)
+ send_vhost_reply(fd, &msg);
+
+ if (skip_master)
+ goto skip_to_post_handle;
+ }
+
+ request = msg.request.master;
+ if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
+ if (!vhost_message_handlers[request])
+ goto skip_to_post_handle;
+ ret = vhost_message_handlers[request](&dev, &msg, fd);
+
+ switch (ret) {
+ case VH_RESULT_ERR:
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Processing %s failed.\n",
+ vhost_message_str[request]);
+ break;
+ case VH_RESULT_OK:
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "Processing %s succeeded.\n",
+ vhost_message_str[request]);
+ break;
+ case VH_RESULT_REPLY:
+ RTE_LOG(DEBUG, VHOST_CONFIG,
+ "Processing %s succeeded and needs reply.\n",
+ vhost_message_str[request]);
+ send_vhost_reply(fd, &msg);
+ break;
+ }
+ } else {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Requested invalid message type %d.\n", request);
+ ret = VH_RESULT_ERR;
+ }
+
+skip_to_post_handle:
+ if (ret != VH_RESULT_ERR && dev->extern_ops.post_msg_handle) {
+ ret = (*dev->extern_ops.post_msg_handle)(
+ dev->vid, (void *)&msg);
+ if (ret == VH_RESULT_ERR)
+ goto skip_to_reply;
+ else if (ret == VH_RESULT_REPLY)
+ send_vhost_reply(fd, &msg);
+ }
+
+skip_to_reply:
+ if (unlock_required)
+ vhost_user_unlock_all_queue_pairs(dev);
+
+ /*
+ * If the request required a reply that was already sent,
+ * this optional reply-ack won't be sent as the
+ * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
+ */
+ if (msg.flags & VHOST_USER_NEED_REPLY) {
+ msg.payload.u64 = ret == VH_RESULT_ERR;
+ msg.size = sizeof(msg.payload.u64);
+ msg.fd_num = 0;
+ send_vhost_reply(fd, &msg);
+ } else if (ret == VH_RESULT_ERR) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "vhost message handling failed.\n");
+ return -1;
+ }
+
+ if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
+ dev->flags |= VIRTIO_DEV_READY;
+
+ if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
+ if (dev->dequeue_zero_copy) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "dequeue zero copy is enabled\n");
+ }
+
+ if (dev->notify_ops->new_device(dev->vid) == 0)
+ dev->flags |= VIRTIO_DEV_RUNNING;
+ }
+ }
+
+ did = dev->vdpa_dev_id;
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (vdpa_dev && virtio_is_ready(dev) &&
+ !(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) &&
+ msg.request.master == VHOST_USER_SET_VRING_ENABLE) {
+ if (vdpa_dev->ops->dev_conf)
+ vdpa_dev->ops->dev_conf(dev->vid);
+ dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
+ if (vhost_user_host_notifier_ctrl(dev->vid, true) != 0) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "(%d) software relay is used for vDPA, performance may be low.\n",
+ dev->vid);
+ }
+ }
+
+ return 0;
+}
+
+static int process_slave_message_reply(struct virtio_net *dev,
+ const struct VhostUserMsg *msg)
+{
+ struct VhostUserMsg msg_reply;
+ int ret;
+
+ if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
+ return 0;
+
+ if (read_vhost_message(dev->slave_req_fd, &msg_reply) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ if (msg_reply.request.slave != msg->request.slave) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Received unexpected msg type (%u), expected %u\n",
+ msg_reply.request.slave, msg->request.slave);
+ ret = -1;
+ goto out;
+ }
+
+ ret = msg_reply.payload.u64 ? -1 : 0;
+
+out:
+ rte_spinlock_unlock(&dev->slave_req_lock);
+ return ret;
+}
+
+int
+vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
+{
+ int ret;
+ struct VhostUserMsg msg = {
+ .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
+ .flags = VHOST_USER_VERSION,
+ .size = sizeof(msg.payload.iotlb),
+ .payload.iotlb = {
+ .iova = iova,
+ .perm = perm,
+ .type = VHOST_IOTLB_MISS,
+ },
+ };
+
+ ret = send_vhost_message(dev->slave_req_fd, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to send IOTLB miss message (%d)\n",
+ ret);
+ return ret;
+ }
+
return 0;
}
+
+static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
+ int index, int fd,
+ uint64_t offset,
+ uint64_t size)
+{
+ int ret;
+ struct VhostUserMsg msg = {
+ .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
+ .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
+ .size = sizeof(msg.payload.area),
+ .payload.area = {
+ .u64 = index & VHOST_USER_VRING_IDX_MASK,
+ .size = size,
+ .offset = offset,
+ },
+ };
+
+ if (fd < 0)
+ msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
+ else {
+ msg.fds[0] = fd;
+ msg.fd_num = 1;
+ }
+
+ ret = send_vhost_slave_message(dev, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to set host notifier (%d)\n", ret);
+ return ret;
+ }
+
+ return process_slave_message_reply(dev, &msg);
+}
+
+int vhost_user_host_notifier_ctrl(int vid, bool enable)
+{
+ struct virtio_net *dev;
+ struct rte_vdpa_device *vdpa_dev;
+ int vfio_device_fd, did, ret = 0;
+ uint64_t offset, size;
+ unsigned int i;
+
+ dev = get_device(vid);
+ if (!dev)
+ return -ENODEV;
+
+ did = dev->vdpa_dev_id;
+ if (did < 0)
+ return -EINVAL;
+
+ if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
+ !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
+ !(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
+ !(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
+ !(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
+ return -ENOTSUP;
+
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (!vdpa_dev)
+ return -ENODEV;
+
+ RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
+ RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
+
+ vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
+ if (vfio_device_fd < 0)
+ return -ENOTSUP;
+
+ if (enable) {
+ for (i = 0; i < dev->nr_vring; i++) {
+ if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
+ &size) < 0) {
+ ret = -ENOTSUP;
+ goto disable;
+ }
+
+ if (vhost_user_slave_set_vring_host_notifier(dev, i,
+ vfio_device_fd, offset, size) < 0) {
+ ret = -EFAULT;
+ goto disable;
+ }
+ }
+ } else {
+disable:
+ for (i = 0; i < dev->nr_vring; i++) {
+ vhost_user_slave_set_vring_host_notifier(dev, i, -1,
+ 0, 0);
+ }
+ }
+
+ return ret;
+}
Code Review / deb_dpdk.git / blobdiff