diff options
| author | Xie Yongji | 2019-02-28 09:53:49 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin | 2019-03-13 03:31:21 +0100 |
| commit | 5ad204bf2a06bf29234df9e6f1ef6c566771b40c (patch) | |
| tree | 14ae9d6c8aeb387104d49e015e98e777dcab3e38 /include | |
| parent | nvdimm: use NVDIMM_ACPI_IO_LEN for the proper IO size (diff) | |
| download | qemu-5ad204bf2a06bf29234df9e6f1ef6c566771b40c.tar.gz qemu-5ad204bf2a06bf29234df9e6f1ef6c566771b40c.tar.xz qemu-5ad204bf2a06bf29234df9e6f1ef6c566771b40c.zip | |
vhost-user: Support transferring inflight buffer between qemu and backend
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 track inflight I/O by backend.
Qemu should retrieve a new one when vm reset.
Signed-off-by: Xie Yongji <xieyongji@baidu.com>
Signed-off-by: Chai Wen <chaiwen@baidu.com>
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Message-Id: <20190228085355.9614-2-xieyongji@baidu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/virtio/vhost-backend.h | 10 | ||||
| -rw-r--r-- | include/hw/virtio/vhost.h | 18 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index 81283ec50f..d6632a18e6 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -25,6 +25,7 @@ typedef enum VhostSetConfigType { VHOST_SET_CONFIG_TYPE_MIGRATION = 1, } VhostSetConfigType; +struct vhost_inflight; struct vhost_dev; struct vhost_log; struct vhost_memory; @@ -104,6 +105,13 @@ typedef int (*vhost_crypto_close_session_op)(struct vhost_dev *dev, typedef bool (*vhost_backend_mem_section_filter_op)(struct vhost_dev *dev, MemoryRegionSection *section); +typedef int (*vhost_get_inflight_fd_op)(struct vhost_dev *dev, + uint16_t queue_size, + struct vhost_inflight *inflight); + +typedef int (*vhost_set_inflight_fd_op)(struct vhost_dev *dev, + struct vhost_inflight *inflight); + typedef struct VhostOps { VhostBackendType backend_type; vhost_backend_init vhost_backend_init; @@ -142,6 +150,8 @@ typedef struct VhostOps { vhost_crypto_create_session_op vhost_crypto_create_session; vhost_crypto_close_session_op vhost_crypto_close_session; vhost_backend_mem_section_filter_op vhost_backend_mem_section_filter; + vhost_get_inflight_fd_op vhost_get_inflight_fd; + vhost_set_inflight_fd_op vhost_set_inflight_fd; } VhostOps; extern const VhostOps user_ops; diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index a7f449fa87..619498c8f4 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -7,6 +7,15 @@ #include "exec/memory.h" /* Generic structures common for any vhost based device. */ + +struct vhost_inflight { + int fd; + void *addr; + uint64_t size; + uint64_t offset; + uint16_t queue_size; +}; + struct vhost_virtqueue { int kick; int call; @@ -120,4 +129,13 @@ int vhost_dev_set_config(struct vhost_dev *dev, const uint8_t *data, */ void vhost_dev_set_config_notifier(struct vhost_dev *dev, const VhostDevConfigOps *ops); + +void vhost_dev_reset_inflight(struct vhost_inflight *inflight); +void vhost_dev_free_inflight(struct vhost_inflight *inflight); +void vhost_dev_save_inflight(struct vhost_inflight *inflight, QEMUFile *f); +int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f); +int vhost_dev_set_inflight(struct vhost_dev *dev, + struct vhost_inflight *inflight); +int vhost_dev_get_inflight(struct vhost_dev *dev, uint16_t queue_size, + struct vhost_inflight *inflight); #endif |