[pbs-devel] [PATCH v2 proxmox-backup 04/15] backup: add check_if_available function to ds

[Hannes Laimer <h.laimer@proxmox.com>]

Makes sure a removable datastore is available, meaning it is plugged in
and mounted correctly. For not removable datastores the function will
never result in an Error, since they're always available.
---
 src/backup/datastore.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/backup/datastore.rs b/src/backup/datastore.rs
index 848459e8..ef3400d7 100644
--- a/src/backup/datastore.rs
+++ b/src/backup/datastore.rs
@@ -52,6 +52,24 @@ pub fn check_backup_owner(
     Ok(())
 }
 
+pub fn check_if_available(config: &datastore::DataStoreConfig) -> Result<(), Error> {
+    if let (Some(uuid), Some(config_mount_point)) = (
+        config.backing_device.clone(),
+        config.backing_device_mount_point.clone(),
+    ) {
+        match tools::disks::get_mount_point_by_uuid(&uuid) {
+            Ok(mount_point) if mount_point.eq(&config_mount_point) => Ok(()),
+            _ => Err(format_err!(
+                "The removale device for datastore '{}' has to be mounted at '{}'!",
+                config.name,
+                config_mount_point
+            )),
+        }
+    } else {
+        Ok(())
+    }
+}
+
 /// Datastore Management
 ///
 /// A Datastore can store severals backups, and provides the
@@ -69,6 +87,9 @@ impl DataStore {
 
         let (config, _digest) = datastore::config()?;
         let config: datastore::DataStoreConfig = config.lookup("datastore", name)?;
+
+        check_if_available(&config)?;
+
         let path = PathBuf::from(&config.path);
 
         let mut map = DATASTORE_MAP.lock().unwrap();
@@ -103,6 +124,8 @@ impl DataStore {
     }
 
     fn open_with_path(store_name: &str, path: &Path, config: DataStoreConfig) -> Result<Self, Error> {
+        check_if_available(&config)?;
+
         let chunk_store = ChunkStore::open(store_name, path)?;
 
         let mut gc_status_path = chunk_store.base_path();
-- 
2.30.2