From: Hannes Laimer <h.laimer@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup v7 04/20] datastore: add helper for checking if a removable datastore is available
Date: Fri, 19 Apr 2024 10:58:18 +0200 [thread overview]
Message-ID: <20240419085834.32850-5-h.laimer@proxmox.com> (raw)
In-Reply-To: <20240419085834.32850-1-h.laimer@proxmox.com>
Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
---
pbs-api-types/src/maintenance.rs | 2 +-
pbs-datastore/src/datastore.rs | 44 ++++++++++++++++++++++++++++++++
pbs-datastore/src/lib.rs | 2 +-
3 files changed, 46 insertions(+), 2 deletions(-)
diff --git a/pbs-api-types/src/maintenance.rs b/pbs-api-types/src/maintenance.rs
index fd4d3416..4f653ec7 100644
--- a/pbs-api-types/src/maintenance.rs
+++ b/pbs-api-types/src/maintenance.rs
@@ -81,7 +81,7 @@ impl MaintenanceMode {
/// 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 {
- self.ty == MaintenanceType::Offline
+ self.ty == MaintenanceType::Offline || self.ty == MaintenanceType::Unmount
}
pub fn check(&self, operation: Option<Operation>) -> Result<(), Error> {
diff --git a/pbs-datastore/src/datastore.rs b/pbs-datastore/src/datastore.rs
index f95da761..274f1506 100644
--- a/pbs-datastore/src/datastore.rs
+++ b/pbs-datastore/src/datastore.rs
@@ -14,6 +14,7 @@ use proxmox_schema::ApiType;
use proxmox_sys::error::SysError;
use proxmox_sys::fs::{file_read_optional_string, replace_file, CreateOptions};
use proxmox_sys::fs::{lock_dir_noblock, DirLockGuard};
+use proxmox_sys::linux::procfs::MountInfo;
use proxmox_sys::process_locker::ProcessLockSharedGuard;
use proxmox_sys::WorkerTaskContext;
use proxmox_sys::{task_log, task_warn};
@@ -49,6 +50,39 @@ pub fn check_backup_owner(owner: &Authid, auth_id: &Authid) -> Result<(), Error>
Ok(())
}
+/// check if a removable datastore is currently available/mounted by using the UUID
+/// to find the `/dev/sdX` path and checking in /proc/self/mountinfo for entries containing it.
+/// If it should mounted, but not in the expected path, so config.path, it is considered not
+/// available.
+pub fn is_datastore_available(config: &DataStoreConfig) -> bool {
+ config.backing_device.as_ref().map_or(true, |uuid| {
+ if let Ok(store_dev_path) = std::fs::read_link(Path::new("/dev/disk/by-uuid").join(uuid))
+ .map(|p| p.to_string_lossy().into_owned())
+ .map(|p| p.replace("../..", "/dev"))
+ .map(PathBuf::from)
+ {
+ let store_mount_point = PathBuf::from(&config.path);
+
+ MountInfo::read().map_or(false, |mount_info| {
+ mount_info
+ .iter()
+ .filter_map(|(_, entry)| {
+ entry
+ .mount_source
+ .as_ref()
+ .map(|source| (&entry.mount_point, source))
+ })
+ .any(|(mount_point, mount_source)| {
+ PathBuf::from(&mount_point) == store_mount_point
+ && PathBuf::from(&mount_source) == store_dev_path
+ })
+ })
+ } else {
+ false
+ }
+ })
+}
+
/// Datastore Management
///
/// A Datastore can store severals backups, and provides the
@@ -158,6 +192,12 @@ impl DataStore {
}
}
+ if config.backing_device.is_some() && !is_datastore_available(&config) {
+ let mut datastore_cache = DATASTORE_MAP.lock().unwrap();
+ datastore_cache.remove(&config.name);
+ bail!("Removable Datastore is not mounted");
+ }
+
if let Some(operation) = operation {
update_active_operations(name, operation, 1)?;
}
@@ -261,6 +301,10 @@ impl DataStore {
) -> Result<Arc<Self>, Error> {
let name = config.name.clone();
+ if !is_datastore_available(&config) {
+ bail!("Datastore is not available")
+ }
+
let tuning: DatastoreTuning = serde_json::from_value(
DatastoreTuning::API_SCHEMA
.parse_property_string(config.tuning.as_deref().unwrap_or(""))?,
diff --git a/pbs-datastore/src/lib.rs b/pbs-datastore/src/lib.rs
index 43050162..458f93d9 100644
--- a/pbs-datastore/src/lib.rs
+++ b/pbs-datastore/src/lib.rs
@@ -206,7 +206,7 @@ pub use manifest::BackupManifest;
pub use store_progress::StoreProgress;
mod datastore;
-pub use datastore::{check_backup_owner, DataStore};
+pub use datastore::{check_backup_owner, is_datastore_available, DataStore};
mod hierarchy;
pub use hierarchy::{
--
2.39.2
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next prev parent reply other threads:[~2024-04-19 8:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-19 8:58 [pbs-devel] [PATCH proxmox-backup v7 00/20] add removable datastores Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 01/20] tools: add disks utility functions Hannes Laimer
2024-04-19 9:54 ` Christian Ebner
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 02/20] pbs-api-types: add backing-device to DataStoreConfig Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 03/20] disks: add UUID to partition info Hannes Laimer
2024-04-19 8:58 ` Hannes Laimer [this message]
2024-04-19 9:14 ` [pbs-devel] [PATCH proxmox-backup v7 04/20] datastore: add helper for checking if a removable datastore is available Christian Ebner
2024-04-19 15:35 ` Hannes Laimer
2024-04-22 8:23 ` Christian Ebner
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 05/20] api: admin: add (un)mount endpoint for removable datastores Hannes Laimer
2024-04-19 10:21 ` Christian Ebner
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 06/20] api: removable datastore creation Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 07/20] api: disks list: add exclude-used flag Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 08/20] pbs-api-types: add removable/is-available flag to DataStoreListItem Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 09/20] bin: manager: add (un)mount command Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 10/20] add auto-mounting for removable datastores Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 11/20] datastore: handle deletion of removable datastore properly Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 12/20] docs: add removable datastores section Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 13/20] ui: add partition selector form Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 14/20] ui: add removable datastore creation support Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 15/20] ui: add (un)mount button to summary Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 16/20] ui: tree: render unmounted datastores correctly Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 17/20] ui: utils: make parseMaintenanceMode more robust Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 18/20] ui: add datastore status mask for unmounted removable datastores Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 19/20] ui: maintenance: fix disable msg field if no type is selected Hannes Laimer
2024-04-19 8:58 ` [pbs-devel] [PATCH proxmox-backup v7 20/20] ui: render 'unmount' maintenance mode correctly Hannes Laimer
2024-04-19 10:10 ` [pbs-devel] [PATCH proxmox-backup v7 00/20] add removable datastores Dietmar Maurer
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