Add method to create empty writable partition.
For now this is just a sparse file to be used as raw image, but in
future it will be a QCOW2 image.
Bug: 190503448
Test: vm create-partition /data/local/tmp/blah 1000000
Change-Id: Ic07cd96b1a05bfaade1fa48d75d1ed3167d32795
diff --git a/vm/src/main.rs b/vm/src/main.rs
index bdb574c..e2c11a8 100644
--- a/vm/src/main.rs
+++ b/vm/src/main.rs
@@ -19,10 +19,12 @@
mod sync;
use android_system_virtualizationservice::aidl::android::system::virtualizationservice::IVirtualizationService::IVirtualizationService;
-use android_system_virtualizationservice::binder::{wait_for_interface, ProcessState, Strong};
+use android_system_virtualizationservice::binder::{wait_for_interface, ProcessState, Strong, ParcelFileDescriptor};
use anyhow::{Context, Error};
use run::command_run;
-use std::path::PathBuf;
+use std::convert::TryInto;
+use std::fs::OpenOptions;
+use std::path::{PathBuf, Path};
use structopt::clap::AppSettings;
use structopt::StructOpt;
@@ -49,6 +51,15 @@
},
/// List running virtual machines
List,
+ /// Create a new empty partition to be used as a writable partition for a VM
+ CreatePartition {
+ /// Path at which to create the image file
+ #[structopt(parse(from_os_str))]
+ path: PathBuf,
+
+ /// The desired size of the partition, in bytes.
+ size: u64,
+ },
}
fn main() -> Result<(), Error> {
@@ -65,6 +76,7 @@
Opt::Run { config, daemonize } => command_run(service, &config, daemonize),
Opt::Stop { cid } => command_stop(service, cid),
Opt::List => command_list(service),
+ Opt::CreatePartition { path, size } => command_create_partition(service, &path, size),
}
}
@@ -83,3 +95,20 @@
println!("Running VMs: {:#?}", vms);
Ok(())
}
+
+/// Initialise an empty partition image of the given size to be used as a writable partition.
+fn command_create_partition(
+ service: Strong<dyn IVirtualizationService>,
+ image_path: &Path,
+ size: u64,
+) -> Result<(), Error> {
+ let image = OpenOptions::new()
+ .create_new(true)
+ .write(true)
+ .open(image_path)
+ .with_context(|| format!("Failed to create {:?}", image_path))?;
+ service
+ .initializeWritablePartition(&ParcelFileDescriptor::new(image), size.try_into()?)
+ .context("Failed to initialize partition with size {}, size")?;
+ Ok(())
+}