mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-09-17 20:44:55 +00:00
62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
|
// Copyright © 2020 Intel Corporation
|
||
|
//
|
||
|
// SPDX-License-Identifier: Apache-2.0
|
||
|
|
||
|
use anyhow::anyhow;
|
||
|
use std::fs::File;
|
||
|
use std::io::BufReader;
|
||
|
use std::path::PathBuf;
|
||
|
use url::Url;
|
||
|
use vm_migration::{MigratableError, Snapshot};
|
||
|
|
||
|
pub const VM_SNAPSHOT_FILE: &str = "vm.json";
|
||
|
|
||
|
pub fn url_to_path(url: &Url) -> std::result::Result<PathBuf, MigratableError> {
|
||
|
match url.scheme() {
|
||
|
"file" => url
|
||
|
.to_file_path()
|
||
|
.map_err(|_| {
|
||
|
MigratableError::MigrateSend(anyhow!("Could not convert file URL to a file path"))
|
||
|
})
|
||
|
.and_then(|path| {
|
||
|
if !path.is_dir() {
|
||
|
return Err(MigratableError::MigrateSend(anyhow!(
|
||
|
"Destination is not a directory"
|
||
|
)));
|
||
|
}
|
||
|
Ok(path)
|
||
|
}),
|
||
|
|
||
|
_ => Err(MigratableError::MigrateSend(anyhow!(
|
||
|
"URL scheme is not file: {}",
|
||
|
url.scheme()
|
||
|
))),
|
||
|
}
|
||
|
}
|
||
|
|
||
|
pub fn recv_vm_snapshot(source_url: &str) -> std::result::Result<Snapshot, MigratableError> {
|
||
|
let url = Url::parse(source_url).map_err(|e| {
|
||
|
MigratableError::MigrateSend(anyhow!("Could not parse destination URL: {}", e))
|
||
|
})?;
|
||
|
|
||
|
match url.scheme() {
|
||
|
"file" => {
|
||
|
let mut vm_snapshot_path = url_to_path(&url)?;
|
||
|
vm_snapshot_path.push(VM_SNAPSHOT_FILE);
|
||
|
|
||
|
// Try opening the snapshot file
|
||
|
let vm_snapshot_file =
|
||
|
File::open(vm_snapshot_path).map_err(|e| MigratableError::MigrateSend(e.into()))?;
|
||
|
let vm_snapshot_reader = BufReader::new(vm_snapshot_file);
|
||
|
let vm_snapshot = serde_json::from_reader(vm_snapshot_reader)
|
||
|
.map_err(|e| MigratableError::MigrateReceive(e.into()))?;
|
||
|
|
||
|
Ok(vm_snapshot)
|
||
|
}
|
||
|
_ => Err(MigratableError::MigrateSend(anyhow!(
|
||
|
"Unsupported VM transport URL scheme: {}",
|
||
|
url.scheme()
|
||
|
))),
|
||
|
}
|
||
|
}
|