[pbs-devel] [PATCH proxmox-backup v6 08/23] api2: admin: add (un)mount endpoint for removable datastores
Hannes Laimer
h.laimer at proxmox.com
Thu Apr 18 16:29:16 CEST 2024
Signed-off-by: Hannes Laimer <h.laimer at proxmox.com>
---
pbs-api-types/src/maintenance.rs | 4 +
src/api2/admin/datastore.rs | 185 +++++++++++++++++++++++++++++--
2 files changed, 179 insertions(+), 10 deletions(-)
diff --git a/pbs-api-types/src/maintenance.rs b/pbs-api-types/src/maintenance.rs
index 4f653ec7..469dc25d 100644
--- a/pbs-api-types/src/maintenance.rs
+++ b/pbs-api-types/src/maintenance.rs
@@ -78,6 +78,10 @@ pub struct MaintenanceMode {
}
impl MaintenanceMode {
+ pub fn new(ty: MaintenanceType, message: Option<String>) -> Self {
+ Self { ty, message }
+ }
+
/// Used for deciding whether the datastore is cleared from the internal cache after the last
/// task finishes, so all open files are closed.
pub fn is_offline(&self) -> bool {
diff --git a/src/api2/admin/datastore.rs b/src/api2/admin/datastore.rs
index 35628c59..0698e770 100644
--- a/src/api2/admin/datastore.rs
+++ b/src/api2/admin/datastore.rs
@@ -26,20 +26,21 @@ use proxmox_sortable_macro::sortable;
use proxmox_sys::fs::{
file_read_firstline, file_read_optional_string, replace_file, CreateOptions,
};
-use proxmox_sys::{task_log, task_warn};
+use proxmox_sys::{task_log, task_warn, WorkerTaskContext};
use pxar::accessor::aio::Accessor;
use pxar::EntryKind;
use pbs_api_types::{
print_ns_and_snapshot, print_store_and_ns, Authid, BackupContent, BackupNamespace, BackupType,
- Counts, CryptMode, DataStoreListItem, DataStoreStatus, GarbageCollectionStatus, GroupListItem,
- KeepOptions, Operation, PruneJobOptions, RRDMode, RRDTimeFrame, SnapshotListItem,
- SnapshotVerifyState, BACKUP_ARCHIVE_NAME_SCHEMA, BACKUP_ID_SCHEMA, BACKUP_NAMESPACE_SCHEMA,
- BACKUP_TIME_SCHEMA, BACKUP_TYPE_SCHEMA, DATASTORE_SCHEMA, IGNORE_VERIFIED_BACKUPS_SCHEMA,
- MAX_NAMESPACE_DEPTH, NS_MAX_DEPTH_SCHEMA, PRIV_DATASTORE_AUDIT, PRIV_DATASTORE_BACKUP,
- PRIV_DATASTORE_MODIFY, PRIV_DATASTORE_PRUNE, PRIV_DATASTORE_READ, PRIV_DATASTORE_VERIFY,
- UPID_SCHEMA, VERIFICATION_OUTDATED_AFTER_SCHEMA,
+ Counts, CryptMode, DataStoreConfig, DataStoreListItem, DataStoreStatus,
+ GarbageCollectionStatus, GroupListItem, KeepOptions, MaintenanceMode, MaintenanceType,
+ Operation, PruneJobOptions, RRDMode, RRDTimeFrame, SnapshotListItem, SnapshotVerifyState,
+ BACKUP_ARCHIVE_NAME_SCHEMA, BACKUP_ID_SCHEMA, BACKUP_NAMESPACE_SCHEMA, BACKUP_TIME_SCHEMA,
+ BACKUP_TYPE_SCHEMA, DATASTORE_SCHEMA, IGNORE_VERIFIED_BACKUPS_SCHEMA, MAX_NAMESPACE_DEPTH,
+ NS_MAX_DEPTH_SCHEMA, PRIV_DATASTORE_AUDIT, PRIV_DATASTORE_BACKUP, PRIV_DATASTORE_MODIFY,
+ PRIV_DATASTORE_PRUNE, PRIV_DATASTORE_READ, PRIV_DATASTORE_VERIFY, UPID_SCHEMA,
+ VERIFICATION_OUTDATED_AFTER_SCHEMA,
};
use pbs_client::pxar::{create_tar, create_zip};
use pbs_config::CachedUserInfo;
@@ -54,8 +55,8 @@ use pbs_datastore::index::IndexFile;
use pbs_datastore::manifest::{BackupManifest, CLIENT_LOG_BLOB_NAME, MANIFEST_BLOB_NAME};
use pbs_datastore::prune::compute_prune_info;
use pbs_datastore::{
- check_backup_owner, task_tracking, BackupDir, BackupGroup, DataStore, LocalChunkReader,
- StoreProgress, CATALOG_NAME,
+ check_backup_owner, is_datastore_available, task_tracking, BackupDir, BackupGroup, DataStore,
+ LocalChunkReader, StoreProgress, CATALOG_NAME,
};
use pbs_tools::json::required_string_param;
use proxmox_rest_server::{formatter, WorkerTask};
@@ -2278,6 +2279,168 @@ pub async fn set_backup_owner(
.await?
}
+pub fn do_mount_device(
+ datastore: DataStoreConfig,
+ worker: Option<&dyn WorkerTaskContext>,
+) -> Result<(), Error> {
+ if let Some(uuid) = datastore.backing_device.as_ref() {
+ if pbs_datastore::is_datastore_available(&datastore) {
+ bail!("device '{uuid}' is already mounted");
+ }
+ let mount_point_path = std::path::Path::new(&datastore.path);
+ if let Some(worker) = worker {
+ task_log!(
+ worker,
+ "mounting '{uuid}' for store {} to '{}'",
+ datastore.name,
+ datastore.path
+ );
+ }
+ crate::tools::disks::mount_by_uuid(uuid, mount_point_path)?;
+
+ Ok(())
+ } else {
+ Err(format_err!(
+ "Datastore '{}' cannot be mounted because it is not removable.",
+ datastore.name
+ ))
+ }
+}
+
+#[api(
+ protected: true,
+ input: {
+ properties: {
+ store: {
+ schema: DATASTORE_SCHEMA,
+ },
+ }
+ },
+ returns: {
+ schema: UPID_SCHEMA,
+ },
+ access: {
+ permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT, false),
+ },
+)]
+/// Mount removable datastore.
+pub fn mount(store: String, rpcenv: &mut dyn RpcEnvironment) -> Result<Value, Error> {
+ let (section_config, _digest) = pbs_config::datastore::config()?;
+ let datastore: DataStoreConfig = section_config.lookup("datastore", &store)?;
+
+ if datastore.backing_device.is_none() {
+ bail!("datastore '{store}' is not removable");
+ }
+
+ let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
+ let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
+
+ let upid = WorkerTask::new_thread(
+ "mount-device",
+ Some(store),
+ auth_id.to_string(),
+ to_stdout,
+ move |worker| do_mount_device(datastore, Some(&worker)),
+ )?;
+
+ Ok(json!(upid))
+}
+
+fn do_unmount_device(
+ datastore: DataStoreConfig,
+ worker: Option<&dyn WorkerTaskContext>,
+) -> Result<(), Error> {
+ let mut active_operations = task_tracking::get_active_operations(&datastore.name)?;
+ let mut counter = 0;
+ while active_operations.read + active_operations.write > 0 {
+ if counter == 0 {
+ if let Some(worker) = worker {
+ if worker.abort_requested() {
+ bail!("aborted, due to user request");
+ }
+ task_log!(
+ worker,
+ "cannot unmount yet, still {} read and {} write operations active",
+ active_operations.read,
+ active_operations.write
+ );
+ }
+ counter = 5000;
+ }
+ counter -= 1;
+ std::thread::sleep(std::time::Duration::from_millis(1));
+ active_operations = task_tracking::get_active_operations(&datastore.name)?;
+ }
+ crate::tools::disks::unmount_by_mountpoint(&datastore.path)?;
+
+ let _lock = pbs_config::datastore::lock_config()?;
+ let (mut section_config, _digest) = pbs_config::datastore::config()?;
+ let mut store_config: DataStoreConfig = section_config.lookup("datastore", &datastore.name)?;
+ store_config.maintenance_mode = None;
+ section_config.set_data(&datastore.name, "datastore", &store_config)?;
+ pbs_config::datastore::save_config(§ion_config)?;
+
+ Ok(())
+}
+
+#[api(
+ protected: true,
+ input: {
+ properties: {
+ store: { schema: DATASTORE_SCHEMA },
+ },
+ },
+ returns: {
+ schema: UPID_SCHEMA,
+ },
+ access: {
+ permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_MODIFY, true),
+ }
+)]
+/// Unmount a removable device that is associated with the datastore
+pub async fn unmount(store: String, rpcenv: &mut dyn RpcEnvironment) -> Result<Value, Error> {
+ let _lock = pbs_config::datastore::lock_config()?;
+ let (mut section_config, _digest) = pbs_config::datastore::config()?;
+ let mut datastore: DataStoreConfig = section_config.lookup("datastore", &store)?;
+
+ if datastore.backing_device.is_none() {
+ bail!("datastore '{}' is not removable", &store);
+ }
+
+ if !is_datastore_available(&datastore) {
+ bail!("datastore '{}' is not mounted", &store);
+ }
+
+ datastore.set_maintenance_mode(Some(MaintenanceMode::new(MaintenanceType::Unmount, None)))?;
+ section_config.set_data(&store, "datastore", &datastore)?;
+ pbs_config::datastore::save_config(§ion_config)?;
+
+ drop(_lock);
+
+ let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
+ let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
+
+ if let Ok(proxy_pid) = proxmox_rest_server::read_pid(pbs_buildcfg::PROXMOX_BACKUP_PROXY_PID_FN)
+ {
+ let sock = proxmox_rest_server::ctrl_sock_from_pid(proxy_pid);
+ let _ = proxmox_rest_server::send_raw_command(
+ sock,
+ &format!("{{\"command\":\"drop-from-datastore-cache\",\"args\":\"{store}\"}}\n"),
+ )
+ .await;
+ }
+
+ let upid = WorkerTask::new_thread(
+ "unmount-device",
+ Some(store),
+ auth_id.to_string(),
+ to_stdout,
+ move |worker| do_unmount_device(datastore, Some(&worker)),
+ )?;
+
+ Ok(json!(upid))
+}
+
#[sortable]
const DATASTORE_INFO_SUBDIRS: SubdirMap = &[
(
@@ -2316,6 +2479,7 @@ const DATASTORE_INFO_SUBDIRS: SubdirMap = &[
.get(&API_METHOD_LIST_GROUPS)
.delete(&API_METHOD_DELETE_GROUP),
),
+ ("mount", &Router::new().post(&API_METHOD_MOUNT)),
(
"namespace",
// FIXME: move into datastore:: sub-module?!
@@ -2350,6 +2514,7 @@ const DATASTORE_INFO_SUBDIRS: SubdirMap = &[
.delete(&API_METHOD_DELETE_SNAPSHOT),
),
("status", &Router::new().get(&API_METHOD_STATUS)),
+ ("unmount", &Router::new().post(&API_METHOD_UNMOUNT)),
(
"upload-backup-log",
&Router::new().upload(&API_METHOD_UPLOAD_BACKUP_LOG),
--
2.39.2
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