move media_pool config to pbs_config workspace

pbs-config/src/lib.rs

@@ -1,5 +1,6 @@
 pub mod domains;
 pub mod drive;
+pub mod media_pool;
 pub mod remote;
 
 use anyhow::{format_err, Error};

pbs-config/src/media_pool.rs

@@ -0,0 +1,82 @@
+//! Media Pool configuration (Tape backup)
+//!
+//! This configuration module is based on [`SectionConfig`], and
+//! provides a type safe interface to store [`MediaPoolConfig`],
+//!
+//! [MediaPoolConfig]: crate::api2::types::MediaPoolConfig
+//! [SectionConfig]: proxmox::api::section_config::SectionConfig
+
+use std::collections::HashMap;
+
+use anyhow::Error;
+use lazy_static::lazy_static;
+
+use proxmox::{
+    api::{
+        schema::*,
+        section_config::{
+            SectionConfig,
+            SectionConfigData,
+            SectionConfigPlugin,
+        }
+    },
+};
+
+use pbs_api_types::{MEDIA_POOL_NAME_SCHEMA, MediaPoolConfig};
+
+use crate::{open_backup_lockfile, replace_backup_config, BackupLockGuard};
+
+lazy_static! {
+    /// Static [`SectionConfig`] to access parser/writer functions.
+    pub static ref CONFIG: SectionConfig = init();
+}
+
+fn init() -> SectionConfig {
+    let mut config = SectionConfig::new(&MEDIA_POOL_NAME_SCHEMA);
+
+    let obj_schema = match MediaPoolConfig::API_SCHEMA {
+        Schema::Object(ref obj_schema) => obj_schema,
+        _ => unreachable!(),
+    };
+    let plugin = SectionConfigPlugin::new("pool".to_string(), Some("name".to_string()), obj_schema);
+    config.register_plugin(plugin);
+
+    config
+}
+
+/// Configuration file name
+pub const MEDIA_POOL_CFG_FILENAME: &str = "/etc/proxmox-backup/media-pool.cfg";
+/// Lock file name (used to prevent concurrent access)
+pub const MEDIA_POOL_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.media-pool.lck";
+
+/// Get exclusive lock
+pub fn lock() -> Result<BackupLockGuard, Error> {
+    open_backup_lockfile(MEDIA_POOL_CFG_LOCKFILE, None, true)
+}
+
+/// Read and parse the configuration file
+pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
+
+    let content = proxmox::tools::fs::file_read_optional_string(MEDIA_POOL_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
+
+    let digest = openssl::sha::sha256(content.as_bytes());
+    let data = CONFIG.parse(MEDIA_POOL_CFG_FILENAME, &content)?;
+    Ok((data, digest))
+}
+
+/// Save the configuration file
+pub fn save_config(config: &SectionConfigData) -> Result<(), Error> {
+    let raw = CONFIG.write(MEDIA_POOL_CFG_FILENAME, &config)?;
+    replace_backup_config(MEDIA_POOL_CFG_FILENAME, raw.as_bytes())
+}
+
+// shell completion helper
+
+/// List existing pool names
+pub fn complete_pool_name(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
+    match config() {
+        Ok((data, _digest)) => data.sections.iter().map(|(id, _)| id.to_string()).collect(),
+        Err(_) => return vec![],
+    }
+}