tape: add drive status api

src/api2/types/tape/drive.rs

@@ -1,5 +1,7 @@
 //! Types for tape drive API
+use std::convert::TryFrom;
 
+use anyhow::{bail, Error};
 use serde::{Deserialize, Serialize};
 
 use proxmox::api::{
@@ -111,3 +113,69 @@ pub struct MamAttribute {
     /// Attribute value
     pub value: String,
 }
+
+#[api()]
+#[derive(Serialize,Deserialize,Debug)]
+pub enum TapeDensity {
+    /// No tape loaded
+    None,
+    /// LTO2
+    LTO2,
+    /// LTO3
+    LTO3,
+    /// LTO4
+    LTO4,
+    /// LTO5
+    LTO5,
+    /// LTO6
+    LTO6,
+    /// LTO7
+    LTO7,
+    /// LTO7M8
+    LTO7M8,
+    /// LTO8
+    LTO8,
+}
+
+impl TryFrom<u8> for TapeDensity {
+    type Error = Error;
+
+    fn try_from(value: u8) -> Result<Self, Self::Error> {
+        let density = match value {
+            0x00 => TapeDensity::None,
+            0x42 => TapeDensity::LTO2,
+            0x44 => TapeDensity::LTO3,
+            0x46 => TapeDensity::LTO4,
+            0x58 => TapeDensity::LTO5,
+            0x5a => TapeDensity::LTO6,
+            0x5c => TapeDensity::LTO7,
+            0x5d => TapeDensity::LTO7M8,
+            0x5e => TapeDensity::LTO8,
+            _ => bail!("unknown tape density code 0x{:02x}", value),
+        };
+        Ok(density)
+    }
+}
+
+#[api(
+    properties: {
+        density: {
+            type: TapeDensity,
+        },
+    },
+)]
+#[derive(Serialize,Deserialize)]
+#[serde(rename_all = "kebab-case")]
+/// Drive status for Linux SCSI drives.
+pub struct LinuxDriveStatusFlat {
+    /// Block size (0 is variable size)
+    pub blocksize: u32,
+    /// Tape density
+    pub density: TapeDensity,
+    /// Status flags
+    pub status: String,
+    /// Current file number
+    pub file_number: i32,
+    /// Current block number
+    pub block_number: i32,
+}