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use crate::{Error, Result, Snapshot};
use bytesize::ByteSize;
use std::{
ffi::{OsStr, OsString},
fmt::Display,
path::PathBuf,
process::Command,
};
macro_rules! opt [
($name:expr, $value:expr) => ({
let mut _temp = OsString::new();
_temp.push($name);
_temp.push("=");
_temp.push($value);
_temp
})
];
#[derive(Debug, Default, Clone)]
pub struct FileSystem {
pub(crate) value: OsString,
mountpoint: PathBuf,
quota: ByteSize,
}
impl Display for FileSystem {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.value.to_string_lossy())
}
}
impl TryFrom<OsString> for FileSystem {
type Error = Error;
fn try_from(value: OsString) -> Result<Self> {
Ok(FileSystem {
value,
..FileSystem::default()
})
}
}
impl TryFrom<&str> for FileSystem {
type Error = Error;
fn try_from(value: &str) -> Result<Self> {
value.try_into()
}
}
impl AsRef<OsStr> for FileSystem {
fn as_ref(&self) -> &OsStr {
self.value.as_ref()
}
}
impl From<FileSystem> for PathBuf {
fn from(val: FileSystem) -> Self {
PathBuf::from(val.value)
}
}
impl From<FileSystem> for String {
fn from(val: FileSystem) -> Self {
val.value.to_string_lossy().to_string()
}
}
impl FileSystem {
pub(super) fn set_opt<T, U>(&self, name: T, value: U) -> Result<&Self>
where
T: AsRef<OsStr>,
U: AsRef<OsStr>,
{
Command::new("zfs")
.arg("set")
.arg(opt!(&name, value))
.arg(&self.value)
.status()?
.success()
.then(|| self)
.ok_or_else(|| {
Error::FileSystem(format!("Failed to set {:?}: {:?}", name.as_ref(), self))
})
}
pub(super) fn set_quota(&mut self, quota: ByteSize) -> Result<Self> {
self.set_opt("quota", quota.to_string())?;
self.quota = quota;
Ok(self.to_owned())
}
pub(super) fn set_mountpoint(&mut self, mountpoint: PathBuf) -> Result<Self> {
self.set_opt("mountpoint", &mountpoint)?;
self.mountpoint = mountpoint;
Ok(self.to_owned())
}
pub(super) fn get_snapshots(&self) -> Result<Vec<Snapshot>> {
Command::new("zfs")
.arg("list")
.arg("-H")
.arg("-o")
.arg("name")
.arg("-t")
.arg("snapshot")
.arg(self)
.output()
.map(|o| String::from_utf8(o.stdout))?
.map_err(Error::from)?
.split_whitespace()
.map(Snapshot::try_from)
.collect()
}
pub(super) fn get_latest_snapshot(&self) -> Result<Option<Snapshot>> {
Ok(self
.get_snapshots()?
.into_iter()
.max_by_key(|s| s.timestamp))
}
pub fn mount(&self) -> Result<()> {
Command::new("zfs")
.arg("mount")
.arg(&self.value)
.status()?
.success()
.then(|| ())
.ok_or_else(|| Error::FileSystem(format!("Failed to mount: {:?}", self)))
}
pub fn unmount(&self) -> Result<()> {
Command::new("zfs")
.arg("unmount")
.arg(&self.value)
.status()?
.success()
.then(|| ())
.ok_or_else(|| Error::FileSystem(format!("Failed to unmount: {:?}", self)))
}
pub fn destroy(&self, force: bool) -> Result<()> {
let mut args: Vec<&OsStr> = Vec::new();
let f_arg = &OsString::from("-f");
if force {
args.push(f_arg);
}
args.push(&self.value);
Command::new("zfs")
.arg("destroy")
.args(args)
.status()?
.success()
.then(|| ())
.ok_or_else(|| Error::FileSystem(format!("Failed to destroy: {:?}", self)))
}
}
|
