146 lines
4.2 KiB
Rust
146 lines
4.2 KiB
Rust
use std::collections::HashMap;
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use anyhow::{bail, Error};
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use lazy_static::lazy_static;
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use proxmox::{
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api::{
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schema::*,
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section_config::{
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SectionConfig,
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SectionConfigData,
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SectionConfigPlugin,
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},
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},
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tools::fs::{
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open_file_locked,
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replace_file,
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CreateOptions,
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},
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};
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use crate::{
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api2::types::{
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DRIVE_NAME_SCHEMA,
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VirtualTapeDrive,
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LinuxTapeDrive,
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ScsiTapeChanger,
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},
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};
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lazy_static! {
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pub static ref CONFIG: SectionConfig = init();
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}
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fn init() -> SectionConfig {
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let mut config = SectionConfig::new(&DRIVE_NAME_SCHEMA);
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let obj_schema = match VirtualTapeDrive::API_SCHEMA {
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Schema::Object(ref obj_schema) => obj_schema,
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_ => unreachable!(),
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};
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let plugin = SectionConfigPlugin::new("virtual".to_string(), Some("name".to_string()), obj_schema);
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config.register_plugin(plugin);
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let obj_schema = match LinuxTapeDrive::API_SCHEMA {
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Schema::Object(ref obj_schema) => obj_schema,
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_ => unreachable!(),
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};
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let plugin = SectionConfigPlugin::new("linux".to_string(), Some("name".to_string()), obj_schema);
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config.register_plugin(plugin);
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let obj_schema = match ScsiTapeChanger::API_SCHEMA {
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Schema::Object(ref obj_schema) => obj_schema,
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_ => unreachable!(),
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};
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let plugin = SectionConfigPlugin::new("changer".to_string(), Some("name".to_string()), obj_schema);
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config.register_plugin(plugin);
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config
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}
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pub const DRIVE_CFG_FILENAME: &str = "/etc/proxmox-backup/tape.cfg";
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pub const DRIVE_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.tape.lck";
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pub fn lock() -> Result<std::fs::File, Error> {
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open_file_locked(DRIVE_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)
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}
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pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
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let content = proxmox::tools::fs::file_read_optional_string(DRIVE_CFG_FILENAME)?;
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let content = content.unwrap_or(String::from(""));
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let digest = openssl::sha::sha256(content.as_bytes());
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let data = CONFIG.parse(DRIVE_CFG_FILENAME, &content)?;
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Ok((data, digest))
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}
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pub fn save_config(config: &SectionConfigData) -> Result<(), Error> {
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let raw = CONFIG.write(DRIVE_CFG_FILENAME, &config)?;
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let backup_user = crate::backup::backup_user()?;
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let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
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// set the correct owner/group/permissions while saving file
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// owner(rw) = root, group(r)= backup
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let options = CreateOptions::new()
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.perm(mode)
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.owner(nix::unistd::ROOT)
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.group(backup_user.gid);
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replace_file(DRIVE_CFG_FILENAME, raw.as_bytes(), options)?;
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Ok(())
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}
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pub fn check_drive_exists(config: &SectionConfigData, drive: &str) -> Result<(), Error> {
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match config.sections.get(drive) {
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Some((section_type, _)) => {
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if !(section_type == "linux" || section_type == "virtual") {
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bail!("Entry '{}' exists, but is not a tape drive", drive);
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}
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}
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None => bail!("Drive '{}' does not exist", drive),
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}
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Ok(())
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}
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// shell completion helper
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/// List all drive names
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pub fn complete_drive_name(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
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match config() {
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Ok((data, _digest)) => data.sections.iter()
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.map(|(id, _)| id.to_string())
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.collect(),
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Err(_) => return vec![],
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}
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}
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/// List Linux tape drives
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pub fn complete_linux_drive_name(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
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match config() {
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Ok((data, _digest)) => data.sections.iter()
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.filter(|(_id, (section_type, _))| {
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section_type == "linux"
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})
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.map(|(id, _)| id.to_string())
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.collect(),
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Err(_) => return vec![],
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}
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}
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/// List Scsi tape changer names
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pub fn complete_changer_name(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
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match config() {
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Ok((data, _digest)) => data.sections.iter()
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.filter(|(_id, (section_type, _))| {
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section_type == "changer"
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})
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.map(|(id, _)| id.to_string())
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.collect(),
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Err(_) => return vec![],
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}
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}
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