108 lines
2.9 KiB
Rust
108 lines
2.9 KiB
Rust
//! Magnetic tape backup
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use anyhow::{format_err, Error};
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use proxmox::tools::fs::{
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create_path,
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CreateOptions,
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};
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#[cfg(test)]
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mod test;
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pub mod file_formats;
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mod tape_write;
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pub use tape_write::*;
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mod tape_read;
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pub use tape_read::*;
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mod helpers;
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pub use helpers::*;
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mod media_set;
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pub use media_set::*;
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mod inventory;
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pub use inventory::*;
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mod linux_list_drives;
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pub use linux_list_drives::*;
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pub mod changer;
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pub mod drive;
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mod media_pool;
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pub use media_pool::*;
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mod media_catalog;
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pub use media_catalog::*;
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mod pool_writer;
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pub use pool_writer::*;
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/// Directory path where we store all tape status information
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pub const TAPE_STATUS_DIR: &str = "/var/lib/proxmox-backup/tape";
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/// Directory path where we store temporary drive state
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pub const DRIVE_STATE_DIR: &str = concat!(PROXMOX_BACKUP_RUN_DIR_M!(), "/drive-state");
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/// Directory path where we store cached changer state
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pub const CHANGER_STATE_DIR: &str = concat!(PROXMOX_BACKUP_RUN_DIR_M!(), "/changer-state");
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/// We limit chunk archive size, so that we can faster restore a
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/// specific chunk (The catalog only store file numbers, so we
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/// need to read the whole archive to restore a single chunk)
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pub const MAX_CHUNK_ARCHIVE_SIZE: usize = 4*1024*1024*1024; // 4GB for now
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/// To improve performance, we need to avoid tape drive buffer flush.
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pub const COMMIT_BLOCK_SIZE: usize = 128*1024*1024*1024; // 128 GiB
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/// Create tape status dir with correct permission
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pub fn create_tape_status_dir() -> Result<(), Error> {
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let backup_user = crate::backup::backup_user()?;
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0750);
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let options = CreateOptions::new()
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.perm(mode)
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.owner(backup_user.uid)
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.group(backup_user.gid);
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create_path(TAPE_STATUS_DIR, None, Some(options))
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.map_err(|err: Error| format_err!("unable to create tape status dir - {}", err))?;
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Ok(())
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}
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/// Create drive state dir with correct permission
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pub fn create_drive_state_dir() -> Result<(), Error> {
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let backup_user = crate::backup::backup_user()?;
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0750);
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let options = CreateOptions::new()
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.perm(mode)
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.owner(backup_user.uid)
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.group(backup_user.gid);
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create_path(DRIVE_STATE_DIR, None, Some(options))
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.map_err(|err: Error| format_err!("unable to create drive state dir - {}", err))?;
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Ok(())
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}
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/// Create changer state cache dir with correct permission
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pub fn create_changer_state_dir() -> Result<(), Error> {
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let backup_user = crate::backup::backup_user()?;
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0750);
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let options = CreateOptions::new()
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.perm(mode)
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.owner(backup_user.uid)
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.group(backup_user.gid);
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create_path(CHANGER_STATE_DIR, None, Some(options))
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.map_err(|err: Error| format_err!("unable to create changer state dir - {}", err))?;
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Ok(())
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}
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