From 43cfb3c35adfa4de0373b7238ba3da5566c16748 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Wed, 9 Dec 2020 12:55:54 +0100
Subject: [PATCH] tape: do not remove changer while still used

---
 src/api2/config/changer.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/api2/config/changer.rs b/src/api2/config/changer.rs
index ed4dd788..6501aa23 100644
--- a/src/api2/config/changer.rs
+++ b/src/api2/config/changer.rs
@@ -11,6 +11,7 @@ use crate::{
         LINUX_DRIVE_PATH_SCHEMA,
         DriveListEntry,
         ScsiTapeChanger,
+        LinuxTapeDrive,
     },
     tape::{
         linux_tape_changer_list,
@@ -216,6 +217,15 @@ pub fn delete_changer(name: String, _param: Value) -> Result<(), Error> {
         None => bail!("Delete changer '{}' failed - no such entry", name),
     }
 
+    let drive_list: Vec<LinuxTapeDrive> = config.convert_to_typed_array("linux")?;
+    for drive in drive_list {
+        if let Some(changer) = drive.changer {
+            if changer == name {
+                bail!("Delete changer '{}' failed - used by drive '{}'", name, drive.name);
+            }
+        }
+    }
+
     config::drive::save_config(&config)?;
 
     Ok(())