This patch introduces two new messages VHOST_USER_GET_INFLIGHT_FD
and VHOST_USER_SET_INFLIGHT_FD to support transferring a shared
buffer between qemu and backend.
Firstly, qemu uses VHOST_USER_GET_INFLIGHT_FD to get the
shared buffer from backend. Then qemu should send it back
through VHOST_USER_SET_INFLIGHT_FD each time we start vhost-user.
This shared buffer is used to process inflight I/O when backend
reconnect.
Signed-off-by: Lin Li <lili...@baidu.com>
Signed-off-by: Xun Ni <ni...@baidu.com>
Signed-off-by: Yu Zhang <zhangy...@baidu.com>
Signed-off-by: Jin Yu <jin...@intel.com>
---
v1 - specify the APIs are split-ring only
v2 - fix APIs and judge split or packed
v3 - Add rte_vhost_ prefix and fix one issue.
---
lib/librte_vhost/rte_vhost.h | 89 +++++++
lib/librte_vhost/rte_vhost_version.map | 4 +
lib/librte_vhost/vhost.c | 163 ++++++++++++-
lib/librte_vhost/vhost.h | 32 +++
lib/librte_vhost/vhost_user.c | 316 +++++++++++++++++++++++++
lib/librte_vhost/vhost_user.h | 13 +-
6 files changed, 615 insertions(+), 2 deletions(-)
diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
index 0226b3eff..01a875abd 100644
--- a/lib/librte_vhost/rte_vhost.h
+++ b/lib/librte_vhost/rte_vhost.h
@@ -71,6 +71,10 @@ extern "C" {
#define VHOST_USER_PROTOCOL_F_HOST_NOTIFIER 11
#endif
+#ifndef VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD
+#define VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD 12
+#endif
+
/** Indicate whether protocol features negotiation is supported. */
#ifndef VHOST_USER_F_PROTOCOL_FEATURES
#define VHOST_USER_F_PROTOCOL_FEATURES 30
@@ -98,6 +102,25 @@ struct rte_vhost_memory {
struct rte_vhost_mem_region regions[];
};
+struct rte_vhost_resubmit_desc {
+ uint16_t index;
+ uint64_t counter;
+};
+
+struct rte_vhost_resubmit_info {
+ struct rte_vhost_resubmit_desc *resubmit_list;
+ uint16_t resubmit_num;
+};
+
+struct rte_vhost_ring_inflight_split {
+ union {
+ struct inflight_info_split *inflight_split;
+ /* TODO */
+ };
+
+ struct rte_vhost_resubmit_info *resubmit_inflight_split;
+};
+
struct rte_vhost_vring {
struct vring_desc *desc;
struct vring_avail *avail;
@@ -603,6 +626,22 @@ uint16_t rte_vhost_dequeue_burst(int vid, uint16_t
queue_id,
*/
int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem);
+/**
+ * Get guest inflight vring info, including inflight ring and resubmit list.
+ *
+ * @param vid
+ * vhost device ID
+ * @param vring_idx
+ * vring index
+ * @param vring
+ * the structure to hold the requested inflight vring info
+ * @return
+ * 0 on success, -1 on failure
+ */
+int __rte_experimental
+rte_vhost_get_vhost_ring_inflight_split(int vid, uint16_t vring_idx,
+ struct rte_vhost_ring_inflight_split *vring);
+
/**
* Get guest vring info, including the vring address, vring size, etc.
*
@@ -631,6 +670,56 @@ int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
*/
int rte_vhost_vring_call(int vid, uint16_t vring_idx);
+/**
+ * set inflight flag for a desc.
+ *
+ * @param vid
+ * vhost device ID
+ * @param vring_idx
+ * vring index
+ * @param idx
+ * inflight entry index
+ * @return
+ * 0 on success, -1 on failure
+ */
+int __rte_experimental
+rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx,
+ uint16_t idx);
+
+/**
+ * clear inflight flag for a desc.
+ *
+ * @param vid
+ * vhost device ID
+ * @param vring_idx
+ * vring index
+ * @param last_used_idx
+ * next free used_idx
+ * @param idx
+ * inflight entry index
+ * @return
+ * 0 on success, -1 on failure
+ */
+int __rte_experimental
+rte_vhost_clr_inflight_desc_split(int vid, uint16_t vring_idx,
+ uint16_t last_used_idx, uint16_t idx);
+
+/**
+ * set last inflight io index.
+ *
+ * @param vid
+ * vhost device ID
+ * @param vring_idx
+ * vring index
+ * @param idx
+ * inflight entry index
+ * @return
+ * 0 on success, -1 on failure
+ */
+int __rte_experimental
+rte_vhost_set_last_inflight_io_split(int vid, uint16_t vring_idx,
+ uint16_t idx);
+
/**
* Get vhost RX queue avail count.
*
diff --git a/lib/librte_vhost/rte_vhost_version.map
b/lib/librte_vhost/rte_vhost_version.map
index 5f1d4a75c..57a166f4f 100644
--- a/lib/librte_vhost/rte_vhost_version.map
+++ b/lib/librte_vhost/rte_vhost_version.map
@@ -87,4 +87,8 @@ EXPERIMENTAL {
rte_vdpa_relay_vring_used;
rte_vhost_extern_callback_register;
rte_vhost_driver_set_protocol_features;
+ rte_vhost_set_inflight_desc_split;
+ rte_vhost_clr_inflight_desc_split;
+ rte_vhost_set_last_inflight_io_split;
+ rte_vhost_get_vhost_ring_inflight_split;
};
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 981837b5d..dac641dc0 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -242,6 +242,30 @@ cleanup_vq(struct vhost_virtqueue *vq, int destroy)
close(vq->kickfd);
}
+void
+cleanup_vq_inflight_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ if (!(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
+ return;
+
+ if (vq_is_packed(dev)) {
+ /* TODO */
+ RTE_LOG(ERR, VHOST_CONFIG, "function only be used for split
inflight.\n");
+ } else {
+ if (vq->inflight_split)
+ vq->inflight_split = NULL;
+ if (vq->resubmit_inflight_split) {
+ if (vq->resubmit_inflight_split->resubmit_list) {
+
free(vq->resubmit_inflight_split->resubmit_list);
+ vq->resubmit_inflight_split->resubmit_list =
NULL;
+ }
+ free(vq->resubmit_inflight_split);
+ vq->resubmit_inflight_split = NULL;
+ }
+ }
+}
+
/*
* Unmap any memory, close any file descriptors and
* free any memory owned by a device.
@@ -253,8 +277,10 @@ cleanup_device(struct virtio_net *dev, int destroy)
vhost_backend_cleanup(dev);
- for (i = 0; i < dev->nr_vring; i++)
+ for (i = 0; i < dev->nr_vring; i++) {
cleanup_vq(dev->virtqueue[i], destroy);
+ cleanup_vq_inflight_split(dev, dev->virtqueue[i]);
+ }
}
void
@@ -726,6 +752,40 @@ rte_vhost_get_mem_table(int vid, struct rte_vhost_memory
**mem)
return 0;
}
+int
+rte_vhost_get_vhost_ring_inflight_split(int vid, uint16_t vring_idx,
+ struct rte_vhost_ring_inflight_split *vring)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+ struct inflight_info_split *inflight_vring;
+
+ dev = get_device(vid);
+ if (dev == NULL || vring == NULL)
+ return -1;
+
+ if (vring_idx >= VHOST_MAX_VRING)
+ return -1;
+
+ vq = dev->virtqueue[vring_idx];
+ if (!vq)
+ return -1;
+
+ inflight_vring = vq->inflight_split;
+ if (!inflight_vring)
+ return -1;
+
+ if (vq_is_packed(dev)) {
+ /* TODO */
+ RTE_LOG(ERR, VHOST_CONFIG, "Can't be packed inflight ring.\n");
+ } else {
+ vring->inflight_split = inflight_vring;
+ vring->resubmit_inflight_split = vq->resubmit_inflight_split;
+ }
+
+ return 0;
+}
+
int
rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
struct rte_vhost_vring *vring)
@@ -781,6 +841,107 @@ rte_vhost_vring_call(int vid, uint16_t vring_idx)
return 0;
}
+int
+rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx, uint16_t idx)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (unlikely(!dev))
+ return -1;
+
+ if (unlikely(!(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))))
+ return 0;
+
+ if (unlikely(vq_is_packed(dev)))
+ return -1;
+
+ if (unlikely(vring_idx >= VHOST_MAX_VRING))
+ return -1;
+
+ vq = dev->virtqueue[vring_idx];
+ if (unlikely(!vq))
+ return -1;
+
+ if (unlikely(!vq->inflight_split))
+ return -1;
+
+ vq->inflight_split->desc[idx].counter = vq->global_counter++;
+ vq->inflight_split->desc[idx].inflight = 1;
+ return 0;
+}
+
+int
+rte_vhost_clr_inflight_desc_split(int vid, uint16_t vring_idx,
+ uint16_t last_used_idx, uint16_t idx)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (unlikely(!dev))
+ return -1;
+
+ if (unlikely(!(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))))
+ return 0;
+
+ if (unlikely(vq_is_packed(dev)))
+ return -1;
+
+ if (unlikely(vring_idx >= VHOST_MAX_VRING))
+ return -1;
+
+ vq = dev->virtqueue[vring_idx];
+ if (unlikely(!vq))
+ return -1;
+
+ if (unlikely(!vq->inflight_split))
+ return -1;
+
+ rte_compiler_barrier();
+
+ vq->inflight_split->desc[idx].inflight = 0;
+
+ rte_compiler_barrier();
+
+ vq->inflight_split->used_idx = last_used_idx;
+ return 0;
+}
+
+int
+rte_vhost_set_last_inflight_io_split(int vid, uint16_t vring_idx, uint16_t idx)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (unlikely(!dev))
+ return -1;
+
+ if (unlikely(!(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))))
+ return 0;
+
+ if (unlikely(vq_is_packed(dev)))
+ return -1;
+
+ if (unlikely(vring_idx >= VHOST_MAX_VRING))
+ return -1;
+
+ vq = dev->virtqueue[vring_idx];
+ if (!vq)
+ return -1;
+
+ if (unlikely(!vq->inflight_split))
+ return -1;
+
+ vq->inflight_split->last_inflight_io = idx;
+ return 0;
+}
+
uint16_t
rte_vhost_avail_entries(int vid, uint16_t queue_id)
{
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 884befa85..1770754eb 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -88,6 +88,22 @@ struct vring_used_elem_packed {
uint32_t count;
};
+struct inflight_desc_split {
+ uint8_t inflight;
+ uint8_t padding[5];
+ uint16_t next;
+ uint64_t counter;
+};
+
+struct inflight_info_split {
+ uint64_t features;
+ uint16_t version;
+ uint16_t desc_num;
+ uint16_t last_inflight_io;
+ uint16_t used_idx;
+ struct inflight_desc_split desc[0];
+};
+
/**
* Structure contains variables relevant to RX/TX virtqueues.
*/
@@ -128,6 +144,14 @@ struct vhost_virtqueue {
/* Physical address of used ring, for logging */
uint64_t log_guest_addr;
+ /* inflight share memory info */
+ union {
+ struct inflight_info_split *inflight_split;
+ /* TODO */
+ };
+ struct rte_vhost_resubmit_info *resubmit_inflight_split;
+ uint64_t global_counter;
+
uint16_t nr_zmbuf;
uint16_t zmbuf_size;
uint16_t last_zmbuf_idx;
@@ -286,6 +310,12 @@ struct guest_page {
uint64_t size;
};
+struct inflight_mem_info {
+ int fd;
+ void *addr;
+ uint64_t size;
+};
+
/**
* Device structure contains all configuration information relating
* to the device.
@@ -303,6 +333,7 @@ struct virtio_net {
uint32_t nr_vring;
int dequeue_zero_copy;
struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
+ struct inflight_mem_info inflight_info;
#define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
char ifname[IF_NAME_SZ];
uint64_t log_size;
@@ -467,6 +498,7 @@ void vhost_destroy_device(int);
void vhost_destroy_device_notify(struct virtio_net *dev);
void cleanup_vq(struct vhost_virtqueue *vq, int destroy);
+void cleanup_vq_inflight_split(struct virtio_net *dev, struct vhost_virtqueue
*vq);
void free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq);
int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index c9e29ece8..c76df099a 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -31,6 +31,8 @@
#include <sys/stat.h>
#include <sys/syscall.h>
#include <assert.h>
+#include <sys/syscall.h>
+#include <asm/unistd.h>
#ifdef RTE_LIBRTE_VHOST_NUMA
#include <numaif.h>
#endif
@@ -49,6 +51,15 @@
#define VIRTIO_MIN_MTU 68
#define VIRTIO_MAX_MTU 65535
+#define INFLIGHT_ALIGNMENT 64
+#define INFLIGHT_VERSION 0xabcd
+#define VIRTQUEUE_MAX_SIZE 1024
+
+#define CLOEXEC 0x0001U
+
+#define ALIGN_DOWN(n, m) ((n) / (m) * (m))
+#define ALIGN_UP(n, m) ALIGN_DOWN((n) + (m) - 1, (m))
+
static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_NONE] = "VHOST_USER_NONE",
[VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
@@ -78,6 +89,8 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
[VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
[VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
+ [VHOST_USER_GET_INFLIGHT_FD] = "VHOST_USER_GET_INFLIGHT_FD",
+ [VHOST_USER_SET_INFLIGHT_FD] = "VHOST_USER_SET_INFLIGHT_FD",
};
static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
@@ -160,6 +173,16 @@ vhost_backend_cleanup(struct virtio_net *dev)
dev->log_addr = 0;
}
+ if (dev->inflight_info.addr) {
+ munmap(dev->inflight_info.addr, dev->inflight_info.size);
+ dev->inflight_info.addr = NULL;
+ }
+
+ if (dev->inflight_info.fd > 0) {
+ close(dev->inflight_info.fd);
+ dev->inflight_info.fd = -1;
+ }
+
if (dev->slave_req_fd >= 0) {
close(dev->slave_req_fd);
dev->slave_req_fd = -1;
@@ -306,6 +329,7 @@ vhost_user_set_features(struct virtio_net **pdev, struct
VhostUserMsg *msg,
dev->virtqueue[dev->nr_vring] = NULL;
cleanup_vq(vq, 1);
+ cleanup_vq_inflight_split(dev, vq);
free_vq(dev, vq);
}
}
@@ -1165,6 +1189,202 @@ virtio_is_ready(struct virtio_net *dev)
return 1;
}
+static int mem_create(const char *name, unsigned int flags)
+{
+#ifdef __NR_memfd_create
+ return syscall(__NR_memfd_create, name, flags);
+#else
+ return -1;
+#endif
+}
+
+void *inflight_mem_alloc(const char *name, size_t size, int *fd)
+{
+ void *ptr;
+ int mfd = -1;
+ char fname[20] = "/tmp/memfd-XXXXXX";
+
+ *fd = -1;
+ mfd = mem_create(name, CLOEXEC);
+ if (mfd != -1) {
+ if (ftruncate(mfd, size) == -1) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "ftruncate fail for alloc inflight
buffer\n");
+ close(mfd);
+ return NULL;
+ }
+ } else {
+ mfd = mkstemp(fname);
+ unlink(fname);
+
+ if (mfd == -1) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "mkstemp fail for alloc inflight
buffer\n");
+ return NULL;
+ }
+
+ if (ftruncate(mfd, size) == -1) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "ftruncate fail for alloc inflight
buffer\n");
+ close(mfd);
+ return NULL;
+ }
+ }
+
+ ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
+ if (ptr == MAP_FAILED) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "mmap fail for alloc inflight buffer\n");
+ close(mfd);
+ return NULL;
+ }
+
+ *fd = mfd;
+ return ptr;
+}
+
+static uint32_t get_pervq_shm_size_split(uint16_t queue_size)
+{
+ return ALIGN_UP(sizeof(struct inflight_desc_split) * queue_size +
+ sizeof(uint64_t) * 1 + sizeof(uint16_t) * 4,
INFLIGHT_ALIGNMENT);
+}
+
+static int
+vhost_user_get_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ int fd;
+ uint64_t mmap_size;
+ void *addr;
+ uint16_t num_queues, queue_size;
+ struct virtio_net *dev = *pdev;
+
+ if (msg->size != sizeof(msg->payload.inflight)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Invalid get_inflight_fd message size is %d",
+ msg->size);
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
+ num_queues = msg->payload.inflight.num_queues;
+ queue_size = msg->payload.inflight.queue_size;
+
+ RTE_LOG(INFO, VHOST_CONFIG, "get_inflight_fd num_queues: %u\n",
+ msg->payload.inflight.num_queues);
+ RTE_LOG(INFO, VHOST_CONFIG, "get_inflight_fd queue_size: %u\n",
+ msg->payload.inflight.queue_size);
+
+ if (vq_is_packed(dev)) {
+ /* TODO */
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Don't support the packed ring\n");
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+ mmap_size = num_queues * get_pervq_shm_size_split(queue_size);
+
+ addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
+ if (!addr) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Failed to alloc vhost inflight
area");
+ msg->payload.inflight.mmap_size = 0;
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+ memset(addr, 0, mmap_size);
+
+ dev->inflight_info.addr = addr;
+ dev->inflight_info.size = msg->payload.inflight.mmap_size = mmap_size;
+ dev->inflight_info.fd = msg->fds[0] = fd;
+ msg->payload.inflight.mmap_offset = 0;
+ msg->fd_num = 1;
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "send inflight mmap_size: %lu\n",
+ msg->payload.inflight.mmap_size);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "send inflight mmap_offset: %lu\n",
+ msg->payload.inflight.mmap_offset);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "send inflight fd: %d\n", msg->fds[0]);
+
+ return RTE_VHOST_MSG_RESULT_REPLY;
+}
+
+static int
+vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ int fd, i;
+ uint64_t mmap_size, mmap_offset;
+ uint16_t num_queues, queue_size;
+ uint32_t pervq_inflight_size;
+ void *addr;
+ struct vhost_virtqueue *vq;
+ struct virtio_net *dev = *pdev;
+
+ fd = msg->fds[0];
+ if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid set_inflight_fd message
size is %d,fd is %d\n",
+ msg->size, fd);
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
+ mmap_size = msg->payload.inflight.mmap_size;
+ mmap_offset = msg->payload.inflight.mmap_offset;
+ num_queues = msg->payload.inflight.num_queues;
+ queue_size = msg->payload.inflight.queue_size;
+
+ if (vq_is_packed(dev)) {
+ /* TODO */
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Don't support the packed ring\n");
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+ pervq_inflight_size = get_pervq_shm_size_split(queue_size);
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd mmap_size: %lu\n", mmap_size);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd mmap_offset: %lu\n", mmap_offset);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd num_queues: %u\n", num_queues);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd queue_size: %u\n", queue_size);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd fd: %d\n", fd);
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "set_inflight_fd pervq_inflight_size: %d\n",
+ pervq_inflight_size);
+
+ if (dev->inflight_info.addr)
+ munmap(dev->inflight_info.addr, dev->inflight_info.size);
+
+ addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, mmap_offset);
+ if (addr == MAP_FAILED) {
+ RTE_LOG(ERR, VHOST_CONFIG, "failed to mmap share memory.\n");
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
+ if (dev->inflight_info.fd)
+ close(dev->inflight_info.fd);
+
+ dev->inflight_info.fd = fd;
+ dev->inflight_info.addr = addr;
+ dev->inflight_info.size = mmap_size;
+
+ for (i = 0; i < num_queues; i++) {
+ vq = dev->virtqueue[i];
+ if (vq_is_packed(dev)) {
+ /* TODO */
+ } else {
+ vq->inflight_split = (struct inflight_info_split *)addr;
+ vq->inflight_split->desc_num = queue_size;
+ }
+ addr = (void *)((char *)addr + pervq_inflight_size);
+ }
+
+ return RTE_VHOST_MSG_RESULT_OK;
+}
+
static int
vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
@@ -1201,6 +1421,94 @@ static int vhost_user_set_vring_err(struct virtio_net
**pdev __rte_unused,
return RTE_VHOST_MSG_RESULT_OK;
}
+static int
+resubmit_desc_compare(const void *a, const void *b)
+{
+ const struct rte_vhost_resubmit_desc *desc0 =
+ (const struct rte_vhost_resubmit_desc *)a;
+ const struct rte_vhost_resubmit_desc *desc1 =
+ (const struct rte_vhost_resubmit_desc *)b;
+
+ if (desc1->counter > desc0->counter &&
+ (desc1->counter - desc0->counter) < VIRTQUEUE_MAX_SIZE * 2)
+ return 1;
+
+ return -1;
+}
+
+static int
+vhost_check_queue_inflights_split(struct virtio_net *dev, struct
vhost_virtqueue *vq)
+{
+ struct vring_used *used = vq->used;
+ uint16_t i = 0;
+ uint16_t resubmit_num = 0;
+ struct rte_vhost_resubmit_info *resubmit = NULL;
+ struct inflight_info_split *inflight_split;
+
+ if (!(dev->protocol_features &
+ (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
+ return RTE_VHOST_MSG_RESULT_OK;
+
+ if ((!vq->inflight_split))
+ return RTE_VHOST_MSG_RESULT_ERR;
+
+ if (!vq->inflight_split->version) {
+ vq->inflight_split->version = INFLIGHT_VERSION;
+ return RTE_VHOST_MSG_RESULT_OK;
+ }
+
+ inflight_split = vq->inflight_split;
+ vq->resubmit_inflight_split = NULL;
+ vq->global_counter = 0;
+
+ if (inflight_split->used_idx != used->idx) {
+ inflight_split->desc[inflight_split->last_inflight_io].inflight
= 0;
+ rte_compiler_barrier();
+ inflight_split->used_idx = used->idx;
+ }
+
+ for (i = 0; i < inflight_split->desc_num; i++) {
+ if (inflight_split->desc[i].inflight == 1)
+ resubmit_num++;
+ }
+
+ vq->last_avail_idx += resubmit_num;
+
+ if (resubmit_num) {
+ resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
+ if (!resubmit) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Failed to allocate memory
for resubmit info.\n");
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
+ resubmit->resubmit_list = calloc(resubmit_num,
+ sizeof(struct rte_vhost_resubmit_desc));
+ if (!resubmit->resubmit_list) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Failed to allocate memory
for inflight desc.\n");
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
+ for (i = 0; i < vq->inflight_split->desc_num; i++) {
+ if (vq->inflight_split->desc[i].inflight == 1) {
+
resubmit->resubmit_list[resubmit->resubmit_num].index = i;
+
resubmit->resubmit_list[resubmit->resubmit_num].counter =
+ inflight_split->desc[i].counter;
+ resubmit->resubmit_num++;
+ }
+ }
+
+ if (resubmit->resubmit_num > 1)
+ qsort(resubmit->resubmit_list, resubmit->resubmit_num,
+ sizeof(struct rte_vhost_resubmit_desc),
+ resubmit_desc_compare);
+
+ vq->global_counter = resubmit->resubmit_list[0].counter + 1;
+ vq->resubmit_inflight_split = resubmit;
+ }
+
+ return RTE_VHOST_MSG_RESULT_OK;
+}
+
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
@@ -1242,6 +1550,12 @@ vhost_user_set_vring_kick(struct virtio_net **pdev,
struct VhostUserMsg *msg,
close(vq->kickfd);
vq->kickfd = file.fd;
+ if (vhost_check_queue_inflights_split(dev, vq)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to inflights for vq: %d\n", file.index);
+ return RTE_VHOST_MSG_RESULT_ERR;
+ }
+
return RTE_VHOST_MSG_RESULT_OK;
}
@@ -1762,6 +2076,8 @@ static vhost_message_handler_t
vhost_message_handlers[VHOST_USER_MAX] = {
[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,
+ [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
+ [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
};
diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
index 2a650fe4b..99a773910 100644
--- a/lib/librte_vhost/vhost_user.h
+++ b/lib/librte_vhost/vhost_user.h
@@ -54,7 +54,9 @@ typedef enum VhostUserRequest {
VHOST_USER_POSTCOPY_ADVISE = 28,
VHOST_USER_POSTCOPY_LISTEN = 29,
VHOST_USER_POSTCOPY_END = 30,
- VHOST_USER_MAX = 31
+ VHOST_USER_GET_INFLIGHT_FD = 31,
+ VHOST_USER_SET_INFLIGHT_FD = 32,
+ VHOST_USER_MAX = 33
} VhostUserRequest;
typedef enum VhostUserSlaveRequest {
@@ -112,6 +114,13 @@ typedef struct VhostUserVringArea {
uint64_t offset;
} VhostUserVringArea;
+typedef struct VhostUserInflight {
+ uint64_t mmap_size;
+ uint64_t mmap_offset;
+ uint16_t num_queues;
+ uint16_t queue_size;
+} VhostUserInflight;
+
typedef struct VhostUserMsg {
union {
uint32_t master; /* a VhostUserRequest value */
@@ -131,6 +140,7 @@ typedef struct VhostUserMsg {
struct vhost_vring_addr addr;
VhostUserMemory memory;
VhostUserLog log;
+ VhostUserInflight inflight;
struct vhost_iotlb_msg iotlb;
VhostUserCryptoSessionParam crypto_session;
VhostUserVringArea area;
@@ -148,6 +158,7 @@ typedef struct VhostUserMsg {
/* vhost_user.c */
int vhost_user_msg_handler(int vid, int fd);
int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm);
+void *inflight_mem_alloc(const char *name, size_t size, int *fd);
/* socket.c */
int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int max_fds,
--
2.17.2
