[pbs-devel] [PATCH proxmox-backup 02/15] api2/tape/changer: add get_drives api call

[Dominik Csapak <d.csapak@proxmox.com>]

so that an api user can get the drives belonging to a changer
without having to parse the config listing themselves

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/api2/tape/changer.rs | 69 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 67 insertions(+), 2 deletions(-)

diff --git a/src/api2/tape/changer.rs b/src/api2/tape/changer.rs
index 87737d32..232f0127 100644
--- a/src/api2/tape/changer.rs
+++ b/src/api2/tape/changer.rs
@@ -11,9 +11,10 @@ use crate::{
     api2::types::{
         CHANGER_NAME_SCHEMA,
         DriveListEntry,
-        ScsiTapeChanger,
-        MtxStatusEntry,
+        LinuxTapeDrive,
         MtxEntryKind,
+        MtxStatusEntry,
+        ScsiTapeChanger,
     },
     tape::{
         TAPE_STATUS_DIR,
@@ -25,6 +26,7 @@ use crate::{
             ScsiMediaChange,
             mtx_status_to_online_set,
         },
+        linux_tape_device_list,
         lookup_drive,
     },
 };
@@ -136,6 +138,64 @@ pub async fn transfer(
     }).await?
 }
 
+#[api(
+    input: {
+        properties: {
+            name: {
+                schema: CHANGER_NAME_SCHEMA,
+            },
+        },
+    },
+    returns: {
+        description: "The list of configured Drives for the given Changer.",
+        type: Array,
+        items: {
+            type: DriveListEntry,
+        },
+    },
+)]
+/// Get Drives belonging to changer
+pub fn get_drives(
+    name: String,
+) -> Result<Vec<DriveListEntry>, Error> {
+
+    let (config, _) = config::drive::config()?;
+
+    let linux_drives = linux_tape_device_list();
+
+    let drive_list: Vec<LinuxTapeDrive> = config.convert_to_typed_array("linux")?;
+
+    let mut list = Vec::new();
+
+    let changer = Some(name);
+
+    for drive in drive_list {
+
+        if drive.changer != changer {
+            continue;
+        }
+
+        let mut entry = DriveListEntry {
+            name: drive.name,
+            path: drive.path.clone(),
+            changer: drive.changer,
+            changer_drivenum: drive.changer_drive_id,
+            vendor: None,
+            model: None,
+            serial: None,
+        };
+        if let Some(info) = lookup_drive(&linux_drives, &drive.path) {
+            entry.vendor = Some(info.vendor.clone());
+            entry.model = Some(info.model.clone());
+            entry.serial = Some(info.serial.clone());
+        }
+
+        list.push(entry);
+    }
+
+    Ok(list)
+}
+
 #[api(
     input: {
         properties: {},
@@ -183,6 +243,11 @@ pub fn list_changers(
 }
 
 const SUBDIRS: SubdirMap = &[
+    (
+        "get-drives",
+        &Router::new()
+            .get(&API_METHOD_GET_DRIVES)
+    ),
     (
         "status",
         &Router::new()
-- 
2.20.1