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extern crate libzfs_sys as sys;
use std::io::Error;
use nvpair;
use nvpair::ForeignType;
use zpool::Zpool;
use zfs::Zfs;
use std::ptr;
use libzfs_error::{LibZfsError, Result};
use std::ffi::CString;
use std::os::raw::{c_int, c_void};
use std::sync::Mutex;
lazy_static! {
pub static ref LOCK: Mutex<()> = Mutex::new(());
}
pub struct Libzfs {
raw: *mut sys::libzfs_handle_t,
}
impl Libzfs {
pub fn new() -> Libzfs {
Libzfs {
raw: unsafe { sys::libzfs_init() },
}
}
pub fn pool_by_name(&mut self, name: &str) -> Option<Zpool> {
unsafe {
let pool_name = CString::new(name).unwrap();
let pool = sys::zpool_open_canfail(self.raw, pool_name.as_ptr());
if pool.is_null() {
None
} else {
Some(Zpool::new(pool))
}
}
}
pub fn dataset_by_name(&mut self, name: &str) -> Option<Zfs> {
unsafe {
let x = CString::new(name).unwrap();
let name = x.into_raw();
let ds = sys::zfs_path_to_zhandle(self.raw, name, sys::zfs_type_dataset());
let _ = CString::from_raw(name);
if ds.is_null() {
None
} else {
Some(Zfs::new(ds))
}
}
}
pub fn find_importable_pools(&mut self) -> nvpair::NvList {
let _l = LOCK.lock().unwrap();
unsafe {
sys::thread_init();
let x = sys::zpool_find_import(self.raw, 0, ptr::null_mut());
sys::thread_fini();
nvpair::NvList::from_ptr(x)
}
}
pub fn import_all(&mut self, nvl: &nvpair::NvList) -> Result<Vec<()>> {
nvl.iter()
.map(|x| {
let nvl2 = x.value_nv_list()?;
let code = unsafe {
sys::zpool_import(
self.raw,
nvl2.as_ptr() as *mut _,
ptr::null(),
ptr::null_mut(),
)
};
match code {
0 => Ok(()),
x => Err(LibZfsError::Io(Error::from_raw_os_error(x))),
}
})
.collect()
}
pub fn export_all(&mut self, pools: &[Zpool]) -> Result<Vec<()>> {
pools
.iter()
.map(|x| x.disable_datasets().and_then(|_| x.export()))
.collect()
}
pub fn get_imported_pools(&mut self) -> Result<Vec<Zpool>> {
unsafe extern "C" fn callback(
handle: *mut sys::zpool_handle_t,
state: *mut c_void,
) -> c_int {
let state = &mut *(state as *mut Vec<Zpool>);
state.push(Zpool::new(handle));
0
}
let mut state: Vec<Zpool> = Vec::new();
let state_ptr: *mut c_void = &mut state as *mut _ as *mut c_void;
let code = unsafe { sys::zpool_iter(self.raw, Some(callback), state_ptr) };
match code {
0 => Ok(state),
x => Err(LibZfsError::Io(Error::from_raw_os_error(x))),
}
}
}
impl Drop for Libzfs {
fn drop(&mut self) {
unsafe { sys::libzfs_fini(self.raw) }
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn open_close_handle() {
Libzfs::new();
}
}