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Improve Mac Volume Curing (#362)

Browse source 
* Improve Mac Volume Curing

* Add test

* Improve error

* Speeling

* Remove comment

* Fix escaping issue

* Reflect comments
This commit is contained in:
Ana Hobden 2023-03-27 13:28:47 -07:00 committed by GitHub
parent 709e81565c
commit a74c6da41e
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 264 additions and 78 deletions
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33
src/action/macos/create_fstab_entry.rs
View file

@ -1,16 +1,13 @@
use uuid::Uuid;
use super::CreateApfsVolume;
use crate::{
action::{Action, ActionDescription, ActionError, ActionState, ActionTag, StatefulAction},
execute_command,
use super::{get_uuid_for_label, CreateApfsVolume};
use crate::action::{
Action, ActionDescription, ActionError, ActionState, ActionTag, StatefulAction,
};
use serde::Deserialize;
use std::{io::SeekFrom, path::Path};
use tokio::{
fs::OpenOptions,
io::{AsyncReadExt, AsyncSeekExt, AsyncWriteExt},
process::Command,
};
use tracing::{span, Span};
@ -269,23 +266,6 @@ impl Action for CreateFstabEntry {
}
}
async fn get_uuid_for_label(apfs_volume_label: &str) -> Result<Uuid, ActionError> {
let output = execute_command(
Command::new("/usr/sbin/diskutil")
.process_group(0)
.arg("info")
.arg("-plist")
.arg(apfs_volume_label)
.stdin(std::process::Stdio::null())
.stdout(std::process::Stdio::piped()),
)
.await?;
let parsed: DiskUtilApfsInfoOutput = plist::from_bytes(&output.stdout)?;
Ok(parsed.volume_uuid)
}
fn fstab_lines(uuid: &Uuid, apfs_volume_label: &str) -> String {
let prelude_comment = fstab_prelude_comment(apfs_volume_label);
let fstab_entry = fstab_entry(uuid);
@ -308,10 +288,3 @@ pub enum CreateFstabEntryError {
#[error("The `/etc/fstab` entry (previously created by the official install scripts) detected during planning disappeared between planning and executing. Cannot update `/etc/fstab` as planned")]
ExistingForeignEntryDisappeared,
}
#[derive(Deserialize, Clone, Debug)]
#[serde(rename_all = "PascalCase")]
struct DiskUtilApfsInfoOutput {
#[serde(rename = "VolumeUUID")]
volume_uuid: Uuid,
}

53
src/action/macos/create_nix_volume.rs
View file

@ -1,5 +1,5 @@
use crate::action::{
base::{create_or_insert_into_file, CreateFile, CreateOrInsertIntoFile},
base::{create_or_insert_into_file, CreateOrInsertIntoFile},
macos::{
BootstrapLaunchctlService, CreateApfsVolume, CreateSyntheticObjects, EnableOwnership,
EncryptApfsVolume, UnmountApfsVolume,
@ -13,7 +13,7 @@ use std::{
use tokio::process::Command;
use tracing::{span, Span};
use super::{create_fstab_entry::CreateFstabEntry, KickstartLaunchctlService};
use super::{create_fstab_entry::CreateFstabEntry, CreateVolumeService, KickstartLaunchctlService};
pub const NIX_VOLUME_MOUNTD_DEST: &str = "/Library/LaunchDaemons/org.nixos.darwin-store.plist";
@ -30,7 +30,7 @@ pub struct CreateNixVolume {
create_volume: StatefulAction<CreateApfsVolume>,
create_fstab_entry: StatefulAction<CreateFstabEntry>,
encrypt_volume: Option<StatefulAction<EncryptApfsVolume>>,
setup_volume_daemon: StatefulAction<CreateFile>,
setup_volume_daemon: StatefulAction<CreateVolumeService>,
bootstrap_volume: StatefulAction<BootstrapLaunchctlService>,
kickstart_launchctl_service: StatefulAction<KickstartLaunchctlService>,
enable_ownership: StatefulAction<EnableOwnership>,
@ -78,44 +78,15 @@ impl CreateNixVolume {
None
};
let name_with_qoutes = format!("\"{name}\"");
let encrypted_command;
let mount_command = if encrypt {
encrypted_command = format!("/usr/bin/security find-generic-password -s {name_with_qoutes} -w | /usr/sbin/diskutil apfs unlockVolume {name_with_qoutes} -mountpoint /nix -stdinpassphrase");
vec!["/bin/sh", "-c", encrypted_command.as_str()]
} else {
vec![
"/usr/sbin/diskutil",
"mount",
"-mountPoint",
"/nix",
name.as_str(),
]
};
// TODO(@hoverbear): Use plist lib we have in tree...
let mount_plist = format!(
"\
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\
<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n\
<plist version=\"1.0\">\n\
<dict>\n\
<key>RunAtLoad</key>\n\
<true/>\n\
<key>Label</key>\n\
<string>org.nixos.darwin-store</string>\n\
<key>ProgramArguments</key>\n\
<array>\n\
{}\
</array>\n\
</dict>\n\
</plist>\n\
\
", mount_command.iter().map(|v| format!("<string>{v}</string>\n")).collect::<Vec<_>>().join("\n")
);
let setup_volume_daemon =
CreateFile::plan(NIX_VOLUME_MOUNTD_DEST, None, None, None, mount_plist, false)
.await
.map_err(|e| ActionError::Child(CreateFile::action_tag(), Box::new(e)))?;
let setup_volume_daemon = CreateVolumeService::plan(
NIX_VOLUME_MOUNTD_DEST,
"org.nixos.darwin-store",
name.clone(),
"/nix",
encrypt,
)
.await
.map_err(|e| ActionError::Child(CreateVolumeService::action_tag(), Box::new(e)))?;
let bootstrap_volume = BootstrapLaunchctlService::plan(
"system",

210
src/action/macos/create_volume_service.rs Normal file
View file

@ -0,0 +1,210 @@
use serde::{Deserialize, Serialize};
use tracing::{span, Span};
use std::path::{Path, PathBuf};
use tokio::{
fs::{remove_file, OpenOptions},
io::AsyncWriteExt,
};
use crate::action::{Action, ActionDescription, ActionError, ActionTag, StatefulAction};
use super::get_uuid_for_label;
/** Create a plist for a `launchctl` service to mount the given `apfs_volume_label` on the given `mount_point`.
*/
#[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
pub struct CreateVolumeService {
pub(crate) path: PathBuf,
apfs_volume_label: String,
mount_service_label: String,
mount_point: PathBuf,
encrypt: bool,
}
impl CreateVolumeService {
#[tracing::instrument(level = "debug", skip_all)]
pub async fn plan(
path: impl AsRef<Path>,
mount_service_label: impl Into<String>,
apfs_volume_label: String,
mount_point: impl AsRef<Path>,
encrypt: bool,
) -> Result<StatefulAction<Self>, ActionError> {
let path = path.as_ref().to_path_buf();
let mount_point = mount_point.as_ref().to_path_buf();
let mount_service_label = mount_service_label.into();
let this = Self {
path,
apfs_volume_label,
mount_service_label,
mount_point,
encrypt,
};
if this.path.exists() {
let discovered_plist: LaunchctlMountPlist = plist::from_file(&this.path)?;
let expected_plist = generate_mount_plist(
&this.mount_service_label,
&this.apfs_volume_label,
&this.mount_point,
encrypt,
)
.await?;
if discovered_plist != expected_plist {
tracing::trace!(
?discovered_plist,
?expected_plist,
"Parsed plists not equal"
);
return Err(ActionError::Custom(Box::new(
CreateVolumeServiceError::DifferentPlist {
expected: expected_plist,
discovered: discovered_plist,
path: this.path.clone(),
},
)));
}
tracing::debug!("Creating file `{}` already complete", this.path.display());
return Ok(StatefulAction::completed(this));
}
Ok(StatefulAction::uncompleted(this))
}
}
#[async_trait::async_trait]
#[typetag::serde(name = "create_volume_service")]
impl Action for CreateVolumeService {
fn action_tag() -> ActionTag {
ActionTag("setup_volume_daemon")
}
fn tracing_synopsis(&self) -> String {
format!(
"Create a `launchctl` plist to mount the APFS volume `{}`",
self.path.display()
)
}
fn tracing_span(&self) -> Span {
let span = span!(
tracing::Level::DEBUG,
"setup_volume_daemon",
path = tracing::field::display(self.path.display()),
buf = tracing::field::Empty,
);
if tracing::enabled!(tracing::Level::TRACE) {
span.record("buf", &self.apfs_volume_label);
}
span
}
fn execute_description(&self) -> Vec<ActionDescription> {
vec![ActionDescription::new(self.tracing_synopsis(), vec![])]
}
#[tracing::instrument(level = "debug", skip_all)]
async fn execute(&mut self) -> Result<(), ActionError> {
let Self {
path,
mount_service_label,
apfs_volume_label,
mount_point,
encrypt,
} = self;
let generated_plist = generate_mount_plist(
&mount_service_label,
&apfs_volume_label,
mount_point,
*encrypt,
)
.await?;
let mut options = OpenOptions::new();
options.create_new(true).write(true).read(true);
let mut file = options
.open(&path)
.await
.map_err(|e| ActionError::Open(path.to_owned(), e))?;
let mut buf = Vec::new();
plist::to_writer_xml(&mut buf, &generated_plist)?;
file.write_all(&buf)
.await
.map_err(|e| ActionError::Write(path.to_owned(), e))?;
Ok(())
}
fn revert_description(&self) -> Vec<ActionDescription> {
vec![ActionDescription::new(
format!("Delete file `{}`", self.path.display()),
vec![format!("Delete file `{}`", self.path.display())],
)]
}
#[tracing::instrument(level = "debug", skip_all)]
async fn revert(&mut self) -> Result<(), ActionError> {
remove_file(&self.path)
.await
.map_err(|e| ActionError::Remove(self.path.to_owned(), e))?;
Ok(())
}
}
/// This function must be able to operate at both plan and execute time.
async fn generate_mount_plist(
mount_service_label: &str,
apfs_volume_label: &str,
mount_point: &Path,
encrypt: bool,
) -> Result<LaunchctlMountPlist, ActionError> {
let apfs_volume_label_with_quotes = format!("\"{apfs_volume_label}\"");
let uuid = get_uuid_for_label(&apfs_volume_label).await?;
// The official Nix scripts uppercase the UUID, so we do as well for compatibility.
let uuid_string = uuid.to_string().to_uppercase();
let mount_command = if encrypt {
let encrypted_command = format!("/usr/bin/security find-generic-password -s {apfs_volume_label_with_quotes} -w | /usr/sbin/diskutil apfs unlockVolume {apfs_volume_label_with_quotes} -mountpoint {mount_point:?} -stdinpassphrase");
vec!["/bin/sh".into(), "-c".into(), encrypted_command]
} else {
vec![
"/usr/sbin/diskutil".into(),
"mount".into(),
"-mountPoint".into(),
mount_point.display().to_string(),
uuid_string,
]
};
let mount_plist = LaunchctlMountPlist {
run_at_load: true,
label: mount_service_label.into(),
program_arguments: mount_command,
};
Ok(mount_plist)
}
#[derive(Deserialize, Clone, Debug, Serialize, PartialEq)]
#[serde(rename_all = "PascalCase")]
pub struct LaunchctlMountPlist {
run_at_load: bool,
label: String,
program_arguments: Vec<String>,
}
#[non_exhaustive]
#[derive(Debug, thiserror::Error)]
pub enum CreateVolumeServiceError {
#[error("`{path}` contents differs, planned `{expected:?}`, discovered `{discovered:?}`")]
DifferentPlist {
expected: LaunchctlMountPlist,
discovered: LaunchctlMountPlist,
path: PathBuf,
},
}

2
src/action/macos/kickstart_launchctl_service.rs
View file

@ -76,7 +76,7 @@ impl Action for KickstartLaunchctlService {
ActionTag("kickstart_launchctl_service")
}
fn tracing_synopsis(&self) -> String {
format!("Run `launchctl kickstart {}`", self.service)
format!("Run `launchctl kickstart -k {}`", self.service)
}
fn tracing_span(&self) -> Span {

33
src/action/macos/mod.rs
View file

@ -6,6 +6,7 @@ pub(crate) mod create_apfs_volume;
pub(crate) mod create_fstab_entry;
pub(crate) mod create_nix_volume;
pub(crate) mod create_synthetic_objects;
pub(crate) mod create_volume_service;
pub(crate) mod enable_ownership;
pub(crate) mod encrypt_apfs_volume;
pub(crate) mod kickstart_launchctl_service;
@ -15,7 +16,39 @@ pub use bootstrap_launchctl_service::BootstrapLaunchctlService;
pub use create_apfs_volume::CreateApfsVolume;
pub use create_nix_volume::{CreateNixVolume, NIX_VOLUME_MOUNTD_DEST};
pub use create_synthetic_objects::{CreateSyntheticObjects, CreateSyntheticObjectsError};
pub use create_volume_service::CreateVolumeService;
pub use enable_ownership::{EnableOwnership, EnableOwnershipError};
pub use encrypt_apfs_volume::EncryptApfsVolume;
pub use kickstart_launchctl_service::KickstartLaunchctlService;
use serde::Deserialize;
use tokio::process::Command;
pub use unmount_apfs_volume::UnmountApfsVolume;
use uuid::Uuid;
use crate::execute_command;
use super::ActionError;
async fn get_uuid_for_label(apfs_volume_label: &str) -> Result<Uuid, ActionError> {
let output = execute_command(
Command::new("/usr/sbin/diskutil")
.process_group(0)
.arg("info")
.arg("-plist")
.arg(apfs_volume_label)
.stdin(std::process::Stdio::null())
.stdout(std::process::Stdio::piped()),
)
.await?;
let parsed: DiskUtilApfsInfoOutput = plist::from_bytes(&output.stdout)?;
Ok(parsed.volume_uuid)
}
#[derive(Deserialize, Clone, Debug)]
#[serde(rename_all = "PascalCase")]
struct DiskUtilApfsInfoOutput {
#[serde(rename = "VolumeUUID")]
volume_uuid: Uuid,
}

2
src/lib.rs
View file

@ -93,7 +93,7 @@ use tokio::process::Command;
#[tracing::instrument(level = "debug", skip_all, fields(command = %format!("{:?}", command.as_std())))]
async fn execute_command(command: &mut Command) -> Result<Output, ActionError> {
tracing::trace!("Executing `{:?}`", command.as_std());
tracing::trace!("Executing");
let output = command
.output()
.await

9
tests/fixtures/macos/macos.json vendored
View file

@ -55,11 +55,10 @@
"setup_volume_daemon": {
"action": {
"path": "/Library/LaunchDaemons/org.nixos.darwin-store.plist",
"user": null,
"group": null,
"mode": null,
"buf": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n<plist version=\"1.0\">\n<dict>\n<key>RunAtLoad</key>\n<true/>\n<key>Label</key>\n<string>org.nixos.darwin-store</string>\n<key>ProgramArguments</key>\n<array>\n<string>/bin/sh</string>\n\n<string>-c</string>\n\n<string>/usr/bin/security find-generic-password -s \"Nix Store\" -w | /usr/sbin/diskutil apfs unlockVolume \"Nix Store\" -mountpoint /nix -stdinpassphrase</string>\n</array>\n</dict>\n</plist>\n",
"force": false
"apfs_volume_label": "Nix Store",
"mount_service_label": "org.nixos.darwin-store",
"mount_point": "/nix",
"encrypt": false
},
"state": "Uncompleted"
},