tape: add media state database

src/tape/mod.rs

@@ -1,3 +1,10 @@
+use anyhow::{format_err, Error};
+
+use proxmox::tools::fs::{
+    create_path,
+    CreateOptions,
+};
+
 pub mod file_formats;
 
 mod tape_write;
@@ -18,8 +25,14 @@ pub use changer::*;
 mod drive;
 pub use drive::*;
 
-/// Directory path where we stora all status information
-pub const MEDIA_POOL_STATUS_DIR: &str = "/var/lib/proxmox-backup/mediapool";
+mod media_state_database;
+pub use media_state_database::*;
+
+mod online_status_map;
+pub use online_status_map::*;
+
+/// Directory path where we store all tape status information
+pub const TAPE_STATUS_DIR: &str = "/var/lib/proxmox-backup/tape";
 
 /// We limit chunk archive size, so that we can faster restore a
 /// specific chunk (The catalog only store file numbers, so we
@@ -28,3 +41,19 @@ pub const MAX_CHUNK_ARCHIVE_SIZE: usize = 4*1024*1024*1024; // 4GB for now
 
 /// To improve performance, we need to avoid tape drive buffer flush.
 pub const COMMIT_BLOCK_SIZE: usize = 128*1024*1024*1024; // 128 GiB
+
+
+/// Create tape status dir with correct permission
+pub fn create_tape_status_dir() -> Result<(), Error> {
+    let backup_user = crate::backup::backup_user()?;
+    let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
+    let opts = CreateOptions::new()
+        .perm(mode)
+        .owner(backup_user.uid)
+        .group(backup_user.gid);
+
+    create_path(TAPE_STATUS_DIR, None, Some(opts))
+        .map_err(|err: Error| format_err!("unable to create tape status dir - {}", err))?;
+
+    Ok(())
+}