[pbs-devel] [PATCH v3 proxmox-backup 04/10] client: make helper to get remote pxar reader reusable

[Christian Ebner]

Move the `get_remote_pxar_reader` helper function so it can be reused
also for getting the metadata archive reader instance for the catalog
dump.

No functional changes.

Signed-off-by: Christian Ebner <c.ebner at proxmox.com>
---
changes since version 2:
- move to pxar tools submodule instead of general client's tools module

 pbs-client/src/pxar/tools.rs     | 36 ++++++++++++++++++++++++++++++--
 proxmox-file-restore/src/main.rs | 30 +++-----------------------
 2 files changed, 37 insertions(+), 29 deletions(-)

diff --git a/pbs-client/src/pxar/tools.rs b/pbs-client/src/pxar/tools.rs
index 2f517022f..1598aeb2e 100644
--- a/pbs-client/src/pxar/tools.rs
+++ b/pbs-client/src/pxar/tools.rs
@@ -2,8 +2,8 @@
 
 use std::ffi::OsStr;
 use std::os::unix::ffi::OsStrExt;
-use std::path::Path;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
 
 use anyhow::{bail, format_err, Context, Error};
 use nix::sys::stat::Mode;
@@ -15,6 +15,13 @@ use pxar::{mode, Entry, EntryKind, Metadata};
 
 use pbs_datastore::catalog::{ArchiveEntry, DirEntryAttribute};
 
+use pbs_datastore::dynamic_index::{BufferedDynamicReader, LocalDynamicReadAt};
+use pbs_datastore::index::IndexFile;
+use pbs_datastore::BackupManifest;
+use pbs_tools::crypt_config::CryptConfig;
+
+use crate::{BackupReader, RemoteChunkReader};
+
 /// Get the file permissions as `nix::Mode`
 pub(crate) fn perms_from_metadata(meta: &Metadata) -> Result<Mode, Error> {
     let mode = meta.stat.get_permission_bits();
@@ -375,3 +382,28 @@ pub fn handle_root_with_optional_format_version_prelude<R: pxar::decoder::SeqRea
         _ => bail!("unexpected entry kind {:?}", first.kind()),
     }
 }
+
+pub async fn get_remote_pxar_reader(
+    archive_name: &str,
+    client: Arc<BackupReader>,
+    manifest: &BackupManifest,
+    crypt_config: Option<Arc<CryptConfig>>,
+) -> Result<(LocalDynamicReadAt<RemoteChunkReader>, u64), Error> {
+    let index = client
+        .download_dynamic_index(manifest, archive_name)
+        .await?;
+    let most_used = index.find_most_used_chunks(8);
+
+    let file_info = manifest.lookup_file_info(archive_name)?;
+    let chunk_reader = RemoteChunkReader::new(
+        client.clone(),
+        crypt_config,
+        file_info.chunk_crypt_mode(),
+        most_used,
+    );
+
+    let reader = BufferedDynamicReader::new(index, chunk_reader);
+    let archive_size = reader.archive_size();
+
+    Ok((LocalDynamicReadAt::new(reader), archive_size))
+}
diff --git a/proxmox-file-restore/src/main.rs b/proxmox-file-restore/src/main.rs
index 40b063ebc..5a563b8e5 100644
--- a/proxmox-file-restore/src/main.rs
+++ b/proxmox-file-restore/src/main.rs
@@ -21,6 +21,7 @@ use pxar::accessor::aio::Accessor;
 use pxar::decoder::aio::Decoder;
 
 use pbs_api_types::{file_restore::FileRestoreFormat, BackupDir, BackupNamespace, CryptMode};
+use pbs_client::pxar::tools::get_remote_pxar_reader;
 use pbs_client::pxar::{create_tar, create_zip, extract_sub_dir, extract_sub_dir_seq};
 use pbs_client::tools::{
     complete_group_or_snapshot, complete_repository, connect, extract_repository_from_value,
@@ -33,9 +34,9 @@ use pbs_client::tools::{
 };
 use pbs_client::{BackupReader, BackupRepository, RemoteChunkReader};
 use pbs_datastore::catalog::{ArchiveEntry, CatalogReader, DirEntryAttribute};
-use pbs_datastore::dynamic_index::{BufferedDynamicReader, LocalDynamicReadAt};
+use pbs_datastore::dynamic_index::BufferedDynamicReader;
 use pbs_datastore::index::IndexFile;
-use pbs_datastore::{BackupManifest, CATALOG_NAME};
+use pbs_datastore::CATALOG_NAME;
 use pbs_key_config::decrypt_key;
 use pbs_tools::crypt_config::CryptConfig;
 
@@ -357,31 +358,6 @@ async fn list(
     Ok(())
 }
 
-async fn get_remote_pxar_reader(
-    archive_name: &str,
-    client: Arc<BackupReader>,
-    manifest: &BackupManifest,
-    crypt_config: Option<Arc<CryptConfig>>,
-) -> Result<(LocalDynamicReadAt<RemoteChunkReader>, u64), Error> {
-    let index = client
-        .download_dynamic_index(manifest, archive_name)
-        .await?;
-    let most_used = index.find_most_used_chunks(8);
-
-    let file_info = manifest.lookup_file_info(archive_name)?;
-    let chunk_reader = RemoteChunkReader::new(
-        client.clone(),
-        crypt_config,
-        file_info.chunk_crypt_mode(),
-        most_used,
-    );
-
-    let reader = BufferedDynamicReader::new(index, chunk_reader);
-    let archive_size = reader.archive_size();
-
-    Ok((LocalDynamicReadAt::new(reader), archive_size))
-}
-
 #[api(
     input: {
         properties: {
-- 
2.39.2