[pbs-devel] [PATCH proxmox-backup 1/2] api2/tape/restore: restore_chunk_archive: only ignore tape related errors

[Dominik Csapak <d.csapak@proxmox.com>]

when we get an error from the tape, we possibly want to ignore it,
i.e. when the file was incomplete, but we still want to error
out if the error came from e.g, the datastore, so we have to move
the error checking code to the 'next_chunk' call

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/api2/tape/restore.rs | 77 ++++++++++++++++++++--------------------
 1 file changed, 38 insertions(+), 39 deletions(-)

diff --git a/src/api2/tape/restore.rs b/src/api2/tape/restore.rs
index afce3449..9f79f06f 100644
--- a/src/api2/tape/restore.rs
+++ b/src/api2/tape/restore.rs
@@ -597,54 +597,53 @@ fn restore_chunk_archive<'a>(
 
     let mut decoder = ChunkArchiveDecoder::new(reader);
 
-    let result: Result<_, Error> = proxmox::try_block!({
-        while let Some((digest, blob)) = decoder.next_chunk()? {
-
-            worker.check_abort()?;
-
-            if let Some(datastore) = datastore {
-                let chunk_exists = datastore.cond_touch_chunk(&digest, false)?;
-                if !chunk_exists {
-                    blob.verify_crc()?;
+    loop {
+        let (digest, blob) = match decoder.next_chunk() {
+            Ok(Some((digest, blob))) => (digest, blob),
+            Ok(None) => break,
+            Err(err) => {
+                let reader = decoder.reader();
+
+                // check if this stream is marked incomplete
+                if let Ok(true) = reader.is_incomplete() {
+                    return Ok(Some(chunks));
+                }
 
-                    if blob.crypt_mode()? == CryptMode::None {
-                        blob.decode(None, Some(&digest))?; // verify digest
-                    }
-                    if verbose {
-                        task_log!(worker, "Insert chunk: {}", proxmox::tools::digest_to_hex(&digest));
-                    }
-                    datastore.insert_chunk(&blob, &digest)?;
-                } else if verbose {
-                    task_log!(worker, "Found existing chunk: {}", proxmox::tools::digest_to_hex(&digest));
+                // check if this is an aborted stream without end marker
+                if let Ok(false) = reader.has_end_marker() {
+                    worker.log("missing stream end marker".to_string());
+                    return Ok(None);
                 }
-            } else if verbose {
-                task_log!(worker, "Found chunk: {}", proxmox::tools::digest_to_hex(&digest));
+
+                // else the archive is corrupt
+                return Err(err);
             }
-            chunks.push(digest);
-        }
-        Ok(())
-    });
+        };
 
-    match result {
-        Ok(()) => Ok(Some(chunks)),
-        Err(err) => {
-            let reader = decoder.reader();
+        worker.check_abort()?;
 
-            // check if this stream is marked incomplete
-            if let Ok(true) = reader.is_incomplete() {
-                return Ok(Some(chunks));
-            }
+        if let Some(datastore) = datastore {
+            let chunk_exists = datastore.cond_touch_chunk(&digest, false)?;
+            if !chunk_exists {
+                blob.verify_crc()?;
 
-            // check if this is an aborted stream without end marker
-            if let Ok(false) = reader.has_end_marker() {
-                worker.log("missing stream end marker".to_string());
-                return Ok(None);
+                if blob.crypt_mode()? == CryptMode::None {
+                    blob.decode(None, Some(&digest))?; // verify digest
+                }
+                if verbose {
+                    task_log!(worker, "Insert chunk: {}", proxmox::tools::digest_to_hex(&digest));
+                }
+                datastore.insert_chunk(&blob, &digest)?;
+            } else if verbose {
+                task_log!(worker, "Found existing chunk: {}", proxmox::tools::digest_to_hex(&digest));
             }
-
-            // else the archive is corrupt
-            Err(err)
+        } else if verbose {
+            task_log!(worker, "Found chunk: {}", proxmox::tools::digest_to_hex(&digest));
         }
+        chunks.push(digest);
     }
+
+    Ok(Some(chunks))
 }
 
 fn restore_snapshot_archive<'a>(
-- 
2.20.1