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tape: improve export media to directly export from drive, add CLI

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This commit is contained in:
Dietmar Maurer
2021-01-10 13:44:44 +01:00
parent c92e3832bf
commit 483da89d03
5 changed files with 135 additions and 32 deletions
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33
src/tape/changer/mod.rs
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@ -10,7 +10,7 @@ pub use mtx_wrapper::*;
mod mtx;
pub use mtx::*;
use anyhow::{bail, Error};
use anyhow::Error;
/// Interface to media change devices
pub trait MediaChange {
@ -80,34 +80,5 @@ pub trait MediaChange {
/// By moving the media to an empty import-export slot. Returns
/// Some(slot) if the media was exported. Returns None if the media is
/// not online (already exported).
fn export_media(&mut self, changer_id: &str) -> Result<Option<u64>, Error> {
let status = self.status()?;
let mut from = None;
let mut to = None;
for (i, (import_export, element_status)) in status.slots.iter().enumerate() {
if *import_export {
if to.is_some() { continue; }
if let ElementStatus::Empty = element_status {
to = Some(i as u64 + 1);
}
} else {
if let ElementStatus::VolumeTag(ref tag) = element_status {
if tag == changer_id {
from = Some(i as u64 + 1);
}
}
}
}
match (from, to) {
(Some(from), Some(to)) => {
self.transfer_media(from, to)?;
Ok(Some(to))
}
(Some(_from), None) => bail!("unable to find free export slot"),
(None, _) => Ok(None), // not online
}
}
fn export_media(&mut self, changer_id: &str) -> Result<Option<u64>, Error>;
}