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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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5b3bcfa233
There's no reason to carry a HashMap of SnapshotDataSection per Snapshot. And given we now provide at most one SnapshotDataSection per Snapshot, there's no need to keep the id part of the SnapshotDataSection structure. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
79 lines
2.6 KiB
Rust
79 lines
2.6 KiB
Rust
// Copyright © 2020 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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#[cfg(all(target_arch = "x86_64", feature = "guest_debug"))]
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use crate::coredump::GuestDebuggableError;
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use crate::{config::VmConfig, vm::VmSnapshot};
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use anyhow::anyhow;
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use std::fs::File;
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use std::io::BufReader;
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use std::path::PathBuf;
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use vm_migration::{MigratableError, Snapshot};
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pub const SNAPSHOT_STATE_FILE: &str = "state.json";
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pub const SNAPSHOT_CONFIG_FILE: &str = "config.json";
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pub fn url_to_path(url: &str) -> std::result::Result<PathBuf, MigratableError> {
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let path: PathBuf = url
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.strip_prefix("file://")
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.ok_or_else(|| {
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MigratableError::MigrateSend(anyhow!("Could not extract path from URL: {}", url))
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})
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.map(|s| s.into())?;
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if !path.is_dir() {
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return Err(MigratableError::MigrateSend(anyhow!(
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"Destination is not a directory"
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)));
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}
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Ok(path)
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}
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#[cfg(all(target_arch = "x86_64", feature = "guest_debug"))]
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pub fn url_to_file(url: &str) -> std::result::Result<PathBuf, GuestDebuggableError> {
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let file: PathBuf = url
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.strip_prefix("file://")
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.ok_or_else(|| {
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GuestDebuggableError::Coredump(anyhow!("Could not extract file from URL: {}", url))
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})
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.map(|s| s.into())?;
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Ok(file)
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}
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pub fn recv_vm_config(source_url: &str) -> std::result::Result<VmConfig, MigratableError> {
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let mut vm_config_path = url_to_path(source_url)?;
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vm_config_path.push(SNAPSHOT_CONFIG_FILE);
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// Try opening the snapshot file
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let vm_config_file =
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File::open(vm_config_path).map_err(|e| MigratableError::MigrateSend(e.into()))?;
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let vm_config_reader = BufReader::new(vm_config_file);
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serde_json::from_reader(vm_config_reader).map_err(|e| MigratableError::MigrateReceive(e.into()))
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}
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pub fn recv_vm_state(source_url: &str) -> std::result::Result<Snapshot, MigratableError> {
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let mut vm_state_path = url_to_path(source_url)?;
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vm_state_path.push(SNAPSHOT_STATE_FILE);
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// Try opening the snapshot file
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let vm_state_file =
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File::open(vm_state_path).map_err(|e| MigratableError::MigrateSend(e.into()))?;
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let vm_state_reader = BufReader::new(vm_state_file);
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serde_json::from_reader(vm_state_reader).map_err(|e| MigratableError::MigrateReceive(e.into()))
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}
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pub fn get_vm_snapshot(snapshot: &Snapshot) -> std::result::Result<VmSnapshot, MigratableError> {
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if let Some(snapshot_data) = snapshot.snapshot_data.as_ref() {
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return snapshot_data.to_state();
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}
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Err(MigratableError::Restore(anyhow!(
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"Could not find VM config snapshot section"
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)))
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}
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