src/tape/mod.rs

   1 use anyhow::{format_err, Error};
   2
   3 use proxmox::tools::fs::{
   4     create_path,
   5     CreateOptions,
   6 };
   7
   8 pub mod file_formats;
   9
  10 mod tape_write;
  11 pub use tape_write::*;
  12
  13 mod tape_read;
  14 pub use tape_read::*;
  15
  16 mod helpers;
  17 pub use helpers::*;
  18
  19 mod inventory;
  20 pub use inventory::*;
  21
  22 mod changer;
  23 pub use changer::*;
  24
  25 mod drive;
  26 pub use drive::*;
  27
  28 mod media_state_database;
  29 pub use media_state_database::*;
  30
  31 mod online_status_map;
  32 pub use online_status_map::*;
  33
  34 mod media_pool;
  35 pub use media_pool::*;
  36
  37 /// Directory path where we store all tape status information
  38 pub const TAPE_STATUS_DIR: &str = "/var/lib/proxmox-backup/tape";
  39
  40 /// We limit chunk archive size, so that we can faster restore a
  41 /// specific chunk (The catalog only store file numbers, so we
  42 /// need to read the whole archive to restore a single chunk)
  43 pub const MAX_CHUNK_ARCHIVE_SIZE: usize = 4*1024*1024*1024; // 4GB for now
  44
  45 /// To improve performance, we need to avoid tape drive buffer flush.
  46 pub const COMMIT_BLOCK_SIZE: usize = 128*1024*1024*1024; // 128 GiB
  47
  48
  49 /// Create tape status dir with correct permission
  50 pub fn create_tape_status_dir() -> Result<(), Error> {
  51     let backup_user = crate::backup::backup_user()?;
  52     let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
  53     let opts = CreateOptions::new()
  54         .perm(mode)
  55         .owner(backup_user.uid)
  56         .group(backup_user.gid);
  57
  58     create_path(TAPE_STATUS_DIR, None, Some(opts))
  59         .map_err(|err: Error| format_err!("unable to create tape status dir - {}", err))?;
  60
  61     Ok(())
  62 }