[pbs-devel] [PATCH proxmox-backup v9 08/26] api: removable datastore creation

[Hannes Laimer]

Signed-off-by: Hannes Laimer <h.laimer at proxmox.com>
---
 src/api2/config/datastore.rs | 63 +++++++++++++++++++++++++++++++++---
 1 file changed, 59 insertions(+), 4 deletions(-)

diff --git a/src/api2/config/datastore.rs b/src/api2/config/datastore.rs
index 87425ff5..ac1248b3 100644
--- a/src/api2/config/datastore.rs
+++ b/src/api2/config/datastore.rs
@@ -8,7 +8,7 @@ use serde_json::Value;
 use proxmox_router::{http_bail, Permission, Router, RpcEnvironment, RpcEnvironmentType};
 use proxmox_schema::{api, param_bail, ApiType};
 use proxmox_section_config::SectionConfigData;
-use proxmox_sys::{task_warn, WorkerTaskContext};
+use proxmox_sys::{task_log, task_warn, WorkerTaskContext};
 use proxmox_uuid::Uuid;
 
 use pbs_api_types::{
@@ -20,7 +20,8 @@ use pbs_config::BackupLockGuard;
 use pbs_datastore::chunk_store::ChunkStore;
 
 use crate::api2::admin::{
-    prune::list_prune_jobs, sync::list_sync_jobs, verify::list_verification_jobs,
+    datastore::do_mount_device, prune::list_prune_jobs, sync::list_sync_jobs,
+    verify::list_verification_jobs,
 };
 use crate::api2::config::prune::{delete_prune_job, do_create_prune_job};
 use crate::api2::config::sync::delete_sync_job;
@@ -72,13 +73,45 @@ pub(crate) fn do_create_datastore(
     datastore: DataStoreConfig,
     worker: Option<&dyn WorkerTaskContext>,
 ) -> Result<(), Error> {
-    let path: PathBuf = datastore.path.clone().into();
+    let mut path: PathBuf = datastore.absolute_path().into();
+    let backup_user = pbs_config::backup_user()?;
+    if let Some(store_mount_point) = datastore.get_mount_point() {
+        let default_options = proxmox_sys::fs::CreateOptions::new();
+        proxmox_sys::fs::create_path(
+            store_mount_point,
+            Some(default_options.clone()),
+            Some(default_options.clone()),
+        )?;
+        do_mount_device(datastore.clone(), worker)?;
+
+        let dir_opts = proxmox_sys::fs::CreateOptions::new()
+            .owner(backup_user.uid)
+            .group(backup_user.gid);
+        proxmox_sys::fs::create_path(
+            datastore.absolute_path(),
+            Some(default_options),
+            Some(dir_opts),
+        )?;
+
+        path.push(".chunks");
+        if path.is_dir() {
+            config.set_data(&datastore.name, "datastore", &datastore)?;
+            pbs_config::datastore::save_config(&config)?;
+            jobstate::create_state_file("garbage_collection", &datastore.name)?;
+            if let Some(worker) = worker {
+                task_log!(
+                    worker,
+                    "created removable datastore, chunkstore already exists"
+                );
+            }
+            return Ok(());
+        }
+    }
 
     let tuning: DatastoreTuning = serde_json::from_value(
         DatastoreTuning::API_SCHEMA
             .parse_property_string(datastore.tuning.as_deref().unwrap_or(""))?,
     )?;
-    let backup_user = pbs_config::backup_user()?;
     let _store = ChunkStore::create(
         &datastore.name,
         path,
@@ -122,6 +155,28 @@ pub fn create_datastore(
         param_bail!("name", "datastore '{}' already exists.", config.name);
     }
 
+    if let Some(uuid) = &config.backing_device {
+        let already_used_by = section_config
+            .sections
+            .iter()
+            .flat_map(|(datastore_name, (_, config))| {
+                config
+                    .as_object()
+                    .and_then(|cfg| cfg.get("backing-device"))
+                    .and_then(|backing_device| backing_device.as_str())
+                    .filter(|&device_uuid| device_uuid == uuid)
+                    .map(|_| datastore_name)
+            })
+            .next();
+
+        if let Some(datastore_name) = already_used_by {
+            param_bail!(
+                "backing-device",
+                "device already in use by datastore '{datastore_name}'",
+            );
+        }
+    }
+
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
     let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
-- 
2.39.2