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vmm: Enable restore feature

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This connects the dots together, making the request from the user reach
the actual implementation for restoring the VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-04-02 08:56:47 +02:00
parent 53613319cc
commit 6eb721301c
1 changed files with 29 additions and 2 deletions
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31
vmm/src/lib.rs
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@ -19,6 +19,7 @@ extern crate vmm_sys_util;
use crate::api::{ApiError, ApiRequest, ApiResponse, ApiResponsePayload, VmInfo, VmmPingResponse};
use crate::config::{DeviceConfig, DiskConfig, NetConfig, PmemConfig, VmConfig};
use crate::migration::{recv_vm_snapshot, vm_config_from_snapshot};
use crate::seccomp_filters::{get_seccomp_filter, Thread};
use crate::vm::{Error as VmError, Vm, VmState};
use libc::EFD_NONBLOCK;
@ -304,8 +305,34 @@ impl Vmm {
}
}
fn vm_restore(&mut self, _source_url: &str) -> result::Result<(), VmError> {
Ok(())
fn vm_restore(&mut self, source_url: &str) -> result::Result<(), VmError> {
if self.vm.is_some() || self.vm_config.is_some() {
return Err(VmError::VmAlreadyCreated);
}
let vm_snapshot = recv_vm_snapshot(source_url).map_err(VmError::Restore)?;
let vm_config = vm_config_from_snapshot(&vm_snapshot).map_err(VmError::Restore)?;
self.vm_config = Some(Arc::clone(&vm_config));
let exit_evt = self.exit_evt.try_clone().map_err(VmError::EventFdClone)?;
let reset_evt = self.reset_evt.try_clone().map_err(VmError::EventFdClone)?;
let vm = Vm::new_from_snapshot(
&vm_snapshot,
exit_evt,
reset_evt,
self.vmm_path.clone(),
source_url,
)?;
self.vm = Some(vm);
// Now we can restore the rest of the VM.
if let Some(ref mut vm) = self.vm {
vm.restore(vm_snapshot).map_err(VmError::Restore)
} else {
Err(VmError::VmNotCreated)
}
}
fn vm_shutdown(&mut self) -> result::Result<(), VmError> {