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vmm: generic vhost-user: add support

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Add VMM support for generic vhost-user devices.

Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
This commit is contained in:
Demi Marie Obenour
2026-02-04 09:52:42 -05:00
committed by Rob Bradford
parent 8c618ff5e0
commit 085a7a49fa
8 changed files with 515 additions and 8 deletions
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50
vmm/src/api/mod.rs
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@@ -51,8 +51,8 @@ use crate::config::RestoreConfig;
use crate::device_tree::DeviceTree;
use crate::vm::{Error as VmError, VmState};
use crate::vm_config::{
DeviceConfig, DiskConfig, FsConfig, NetConfig, PmemConfig, UserDeviceConfig, VdpaConfig,
VmConfig, VsockConfig,
DeviceConfig, DiskConfig, FsConfig, GenericVhostUserConfig, NetConfig, PmemConfig,
UserDeviceConfig, VdpaConfig, VmConfig, VsockConfig,
};
/// API errors are sent back from the VMM API server through the ApiResponse.
@@ -170,6 +170,10 @@ pub enum ApiError {
#[error("The fs could not be added to the VM")]
VmAddFs(#[source] VmError),
/// The generic vhost-user device could not be added to the VM.
#[error("The generic vhost-user device could not be added to the VM")]
VmAddGenericVhostUser(#[source] VmError),
/// The pmem device could not be added to the VM.
#[error("The pmem device could not be added to the VM")]
VmAddPmem(#[source] VmError),
@@ -340,6 +344,11 @@ pub trait RequestHandler {
fn vm_add_fs(&mut self, fs_cfg: FsConfig) -> Result<Option<Vec<u8>>, VmError>;
fn vm_add_generic_vhost_user(
&mut self,
fs_cfg: GenericVhostUserConfig,
) -> Result<Option<Vec<u8>>, VmError>;
fn vm_add_pmem(&mut self, pmem_cfg: PmemConfig) -> Result<Option<Vec<u8>>, VmError>;
fn vm_add_net(&mut self, net_cfg: NetConfig) -> Result<Option<Vec<u8>>, VmError>;
@@ -539,6 +548,43 @@ impl ApiAction for VmAddFs {
}
}
pub struct VmAddGenericVhostUser;
impl ApiAction for VmAddGenericVhostUser {
type RequestBody = GenericVhostUserConfig;
type ResponseBody = Option<Body>;
fn request(
&self,
config: Self::RequestBody,
response_sender: Sender<ApiResponse>,
) -> ApiRequest {
Box::new(move |vmm| {
info!("API request event: VmAddGenericVhostUser {config:?}");
let response = vmm
.vm_add_generic_vhost_user(config)
.map_err(ApiError::VmAddGenericVhostUser)
.map(ApiResponsePayload::VmAction);
response_sender
.send(response)
.map_err(VmmError::ApiResponseSend)?;
Ok(false)
})
}
fn send(
&self,
api_evt: EventFd,
api_sender: Sender<ApiRequest>,
data: Self::RequestBody,
) -> ApiResult<Self::ResponseBody> {
get_response_body(self, api_evt, api_sender, data)
}
}
pub struct VmAddPmem;
impl ApiAction for VmAddPmem {