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From: Shannon Sterz <s.sterz@proxmox.com>
To: pbs-devel@lists.proxmox.com
Date: Wed, 16 Apr 2025 10:56:45 +0200
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Subject: [pbs-devel] [PATCH proxmox-backup] sync: switch reader back to a
shared lock
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the below commit accidentally switched this lock to an exclusive lock
when it should just be a shared one as that is sufficient for a
reader:
e2c1866b: datastore/api/backup: prepare for fix of #3935 by adding
lock helpers
this has already caused failed backups for a user with a sync job that
runs while they are trying to create a new backup.
https://forum.proxmox.com/threads/165038
Signed-off-by: Shannon Sterz <s.sterz@proxmox.com>
---
this also explains the issue we have seen on an internal pbs host.
src/server/sync.rs | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/server/sync.rs b/src/server/sync.rs
index 528e2054..09814ef0 100644
--- a/src/server/sync.rs
+++ b/src/server/sync.rs
@@ -480,7 +480,7 @@ impl SyncSource for LocalSource {
) -> Result<Arc<dyn SyncSourceReader>, Error> {
let dir = self.store.backup_dir(ns.clone(), dir.clone())?;
let guard = dir
- .lock()
+ .lock_shared()
.with_context(|| format!("while reading snapshot '{dir:?}' for a sync job"))?;
Ok(Arc::new(LocalSourceReader {
_dir_lock: Arc::new(Mutex::new(guard)),
--
2.39.5
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