From: Christian Ebner <c.ebner@proxmox.com>
To: Proxmox Backup Server development discussion
<pbs-devel@lists.proxmox.com>,
Hannes Laimer <h.laimer@proxmox.com>
Subject: Re: [pbs-devel] [PATCH proxmox-backup v7 04/20] datastore: add helper for checking if a removable datastore is available
Date: Fri, 19 Apr 2024 11:14:02 +0200 [thread overview]
Message-ID: <f1cd9343-e70f-4608-9fbb-5460c7ebdd74@proxmox.com> (raw)
In-Reply-To: <20240419085834.32850-5-h.laimer@proxmox.com>
On 4/19/24 10:58, Hannes Laimer wrote:
> 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())
while this probably never happens for this case, the `to_string_lossy`
might replace non UTF-8 characters here.
So I think this and the next two map calls should be replaced with a
`canonicalize` of `PathBuf`, which also resolves the symlink?
https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.canonicalize
> + .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::{
_______________________________________________
pbs-devel mailing list
pbs-devel@lists.proxmox.com
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel
next prev parent reply other threads:[~2024-04-19 9:14 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 ` [pbs-devel] [PATCH proxmox-backup v7 04/20] datastore: add helper for checking if a removable datastore is available Hannes Laimer
2024-04-19 9:14 ` Christian Ebner [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f1cd9343-e70f-4608-9fbb-5460c7ebdd74@proxmox.com \
--to=c.ebner@proxmox.com \
--cc=h.laimer@proxmox.com \
--cc=pbs-devel@lists.proxmox.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox