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tape: MediaPool - allow to allocate free tapes

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This commit is contained in:
Dietmar Maurer 2021-01-13 14:25:51 +01:00
parent 8446fbca85
commit 25e464c5ce
1 changed files with 59 additions and 15 deletions
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72
src/tape/media_pool.rs
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@ -330,26 +330,70 @@ impl MediaPool {
} }
}); });
match expired_media.first_mut() { if let Some(media) = expired_media.first_mut() {
None => { println!("reuse expired media '{}'", media.label_text());
bail!("alloc writable media in pool '{}' failed: no usable media found", self.name());
}
Some(media) => {
println!("reuse expired media '{}'", media.label_text());
let seq_nr = self.current_media_set.media_list().len() as u64; let seq_nr = self.current_media_set.media_list().len() as u64;
let set = MediaSetLabel::with_data(&pool, self.current_media_set.uuid().clone(), seq_nr, current_time); let set = MediaSetLabel::with_data(&pool, self.current_media_set.uuid().clone(), seq_nr, current_time);
media.set_media_set_label(set); media.set_media_set_label(set);
let clear_media_status = true; // remove Full status let clear_media_status = true; // remove Full status
self.inventory.store(media.id().clone(), clear_media_status)?; // store persistently self.inventory.store(media.id().clone(), clear_media_status)?; // store persistently
self.current_media_set.add_media(media.uuid().clone()); self.current_media_set.add_media(media.uuid().clone());
return Ok(media.uuid().clone()); return Ok(media.uuid().clone());
}
} }
println!("no expired media in pool, try to find unassigned/free media");
// try unassigned media
// fixme: lock free media pool to avoid races
let mut free_media = Vec::new();
for media_id in self.inventory.list_unassigned_media() {
let (status, location) = self.compute_media_state(&media_id);
if media_id.media_set_label.is_some() { continue; } // should not happen
// check if media is on site
match location {
MediaLocation::Online(_) => { /* OK */ },
MediaLocation::Offline => {
if self.use_offline_media {
/* OK */
} else {
continue;
}
},
MediaLocation::Vault(_) => continue,
}
// only consider writable media
if status != MediaStatus::Writable { continue; }
free_media.push(media_id);
}
if let Some(media) = free_media.first_mut() {
println!("use free media '{}'", media.label.label_text);
let seq_nr = self.current_media_set.media_list().len() as u64;
let set = MediaSetLabel::with_data(&pool, self.current_media_set.uuid().clone(), seq_nr, current_time);
media.media_set_label = Some(set);
let clear_media_status = true; // remove Full status
self.inventory.store(media.clone(), clear_media_status)?; // store persistently
self.current_media_set.add_media(media.label.uuid.clone());
return Ok(media.label.uuid.clone());
}
bail!("alloc writable media in pool '{}' failed: no usable media found", self.name());
} }
/// check if the current media set is usable for writing /// check if the current media set is usable for writing