api2/tape/{backup, restore}, proxmox-tape: set device state

set the drive device state everywhere we lock it, so that we
know what it currently does

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/api2/tape/backup.rs

@@ -54,6 +54,7 @@ use crate::{
         drive::{
             media_changer,
             lock_tape_device,
+            set_tape_device_state,
         },
         changer::update_changer_online_status,
     },
@@ -139,6 +140,7 @@ pub fn do_tape_backup_job(
         move |worker| {
             let _drive_lock = drive_lock; // keep lock guard
 
+            set_tape_device_state(&tape_job.drive, &worker.upid().to_string())?;
             job.start(&worker.upid().to_string())?;
 
             let eject_media = false;
@@ -168,6 +170,14 @@ pub fn do_tape_backup_job(
                 );
             }
 
+            if let Err(err) = set_tape_device_state(&tape_job.drive, "") {
+                eprintln!(
+                    "could not unset drive state for {}: {}",
+                    tape_job.drive,
+                    err
+                );
+            }
+
             job_result
         }
     )?;
@@ -265,7 +275,10 @@ pub fn backup(
         to_stdout,
         move |worker| {
             let _drive_lock = drive_lock; // keep lock guard
+            set_tape_device_state(&drive, &worker.upid().to_string())?;
             backup_worker(&worker, datastore, &drive, &pool_config, eject_media, export_media_set)?;
+            // ignore errors
+            let _ = set_tape_device_state(&drive, "");
             Ok(())
         }
     )?;