From: Hannes Laimer <h.laimer@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup v11 06/26] datastore: add helper for checking if a removable datastore is available
Date: Tue, 20 Aug 2024 17:43:40 +0200 [thread overview]
Message-ID: <20240820154400.149863-7-h.laimer@proxmox.com> (raw)
In-Reply-To: <20240820154400.149863-1-h.laimer@proxmox.com>
Co-authored-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
---
pbs-api-types/src/maintenance.rs | 2 +-
pbs-datastore/src/datastore.rs | 58 ++++++++++++++++++++++++++++++++
pbs-datastore/src/lib.rs | 2 +-
src/bin/proxmox-backup-proxy.rs | 5 ++-
4 files changed, 64 insertions(+), 3 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 fb37bd5a..29f98b37 100644
--- a/pbs-datastore/src/datastore.rs
+++ b/pbs-datastore/src/datastore.rs
@@ -1,5 +1,6 @@
use std::collections::{HashMap, HashSet};
use std::io::{self, Write};
+use std::os::unix::ffi::OsStrExt;
use std::os::unix::io::AsRawFd;
use std::path::{Path, PathBuf};
use std::sync::{Arc, LazyLock, Mutex};
@@ -14,6 +15,7 @@ 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_worker_task::WorkerTaskContext;
@@ -46,6 +48,52 @@ pub fn check_backup_owner(owner: &Authid, auth_id: &Authid) -> Result<(), Error>
Ok(())
}
+/// check if a removable datastore is currently available/mounted by
+/// comparing the `st_rdev` values of `/dev/disk/by-uuid/<uuid>` and the source device in
+/// /proc/self/mountinfo
+pub fn is_datastore_available(config: &DataStoreConfig) -> bool {
+ use nix::sys::stat::SFlag;
+
+ let uuid = match config.backing_device.as_deref() {
+ Some(dev) => dev,
+ None => return true,
+ };
+
+ let Some(store_mount_point) = config.get_mount_point() else {
+ return true;
+ };
+ let store_mount_point = Path::new(&store_mount_point);
+
+ let dev_node = match nix::sys::stat::stat(format!("/dev/disk/by-uuid/{uuid}").as_str()) {
+ Ok(stat) if SFlag::from_bits_truncate(stat.st_mode) == SFlag::S_IFBLK => stat.st_rdev,
+ _ => return false,
+ };
+
+ let Ok(mount_info) = MountInfo::read() else {
+ return false;
+ };
+
+ for (_, entry) in mount_info {
+ let Some(source) = entry.mount_source else {
+ continue;
+ };
+
+ if entry.mount_point != store_mount_point || !source.as_bytes().starts_with(b"/") {
+ continue;
+ }
+
+ if let Ok(stat) = nix::sys::stat::stat(source.as_os_str()) {
+ let sflag = SFlag::from_bits_truncate(stat.st_mode);
+
+ if sflag == SFlag::S_IFBLK && stat.st_rdev == dev_node {
+ return true;
+ }
+ }
+ }
+
+ false
+}
+
/// Datastore Management
///
/// A Datastore can store severals backups, and provides the
@@ -155,6 +203,12 @@ 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");
+ }
+
let mut datastore_cache = DATASTORE_MAP.lock().unwrap();
let entry = datastore_cache.get(name);
@@ -258,6 +312,10 @@ 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 202b0955..6d58f327 100644
--- a/pbs-datastore/src/lib.rs
+++ b/pbs-datastore/src/lib.rs
@@ -204,7 +204,7 @@ 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::{
diff --git a/src/bin/proxmox-backup-proxy.rs b/src/bin/proxmox-backup-proxy.rs
index 6ccf2f96..58fb8b84 100644
--- a/src/bin/proxmox-backup-proxy.rs
+++ b/src/bin/proxmox-backup-proxy.rs
@@ -23,7 +23,7 @@ use proxmox_sys::fs::{CreateOptions, FileSystemInformation};
use proxmox_sys::linux::procfs::{Loadavg, ProcFsMemInfo, ProcFsNetDev, ProcFsStat};
use proxmox_sys::logrotate::LogRotate;
-use pbs_datastore::DataStore;
+use pbs_datastore::{is_datastore_available, DataStore};
use proxmox_rest_server::{
cleanup_old_tasks, cookie_from_header, rotate_task_log_archive, ApiConfig, Redirector,
@@ -1132,6 +1132,9 @@ fn collect_disk_stats_sync() -> (DiskStat, Vec<DiskStat>) {
{
continue;
}
+ if !is_datastore_available(&config) {
+ continue;
+ }
let path = std::path::PathBuf::from(config.absolute_path());
datastores.push(gather_disk_stats(disk_manager.clone(), &path, &config.name));
}
--
2.39.2
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next prev parent reply other threads:[~2024-08-20 15:44 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-20 15:43 [pbs-devel] [PATCH proxmox-backup v11 00/26] add removable datastores Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 01/26] tools: add disks utility functions Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 02/26] config: factor out method to get the absolute datastore path Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 03/26] pbs-api-types: add backing-device to DataStoreConfig Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 04/26] maintenance: add 'Unmount' maintenance type Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 05/26] disks: add UUID to partition info Hannes Laimer
2024-08-20 15:43 ` Hannes Laimer [this message]
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 07/26] api: admin: add (un)mount endpoint for removable datastores Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 08/26] api: removable datastore creation Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 09/26] api: disks list: add exclude-used flag Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 10/26] pbs-api-types: add removable/is-available flag to DataStoreListItem Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 11/26] bin: manager: add (un)mount command Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 12/26] add auto-mounting for removable datastores Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 13/26] datastore: handle deletion of removable datastore properly Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 14/26] docs: add removable datastores section Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 15/26] ui: add partition selector form Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 16/26] ui: add removable datastore creation support Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 17/26] ui: add (un)mount button to summary Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 18/26] ui: tree: render unmounted datastores correctly Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 19/26] ui: utils: make parseMaintenanceMode more robust Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 20/26] ui: add datastore status mask for unmounted removable datastores Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 21/26] ui: maintenance: fix disable msg field if no type is selected Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 22/26] ui: render 'unmount' maintenance mode correctly Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 23/26] api: node: allow creation of removable datastore through directory endpoint Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 24/26] api: node: include removable datastores in directory list Hannes Laimer
2024-08-20 15:43 ` [pbs-devel] [PATCH proxmox-backup v11 25/26] node: disks: replace BASE_MOUNT_DIR with DATASTORE_MOUNT_DIR Hannes Laimer
2024-08-20 15:44 ` [pbs-devel] [PATCH proxmox-backup v11 26/26] ui: support create removable datastore through directory creation Hannes Laimer
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