src/backup/datastore.rs

   1 use std::collections::{HashSet, HashMap};
   2 use std::io::{self, Write};
   3 use std::path::{Path, PathBuf};
   4 use std::sync::{Arc, Mutex};
   5 use std::convert::TryFrom;
   6
   7 use anyhow::{bail, format_err, Error};
   8 use lazy_static::lazy_static;
   9 use serde_json::Value;
  10
  11 use proxmox::tools::fs::{replace_file, CreateOptions};
  12
  13 use super::backup_info::{BackupGroup, BackupDir};
  14 use super::chunk_store::ChunkStore;
  15 use super::dynamic_index::{DynamicIndexReader, DynamicIndexWriter};
  16 use super::fixed_index::{FixedIndexReader, FixedIndexWriter};
  17 use super::manifest::{MANIFEST_BLOB_NAME, CLIENT_LOG_BLOB_NAME, BackupManifest};
  18 use super::index::*;
  19 use super::{DataBlob, ArchiveType, archive_type};
  20 use crate::config::datastore;
  21 use crate::task::TaskState;
  22 use crate::tools;
  23 use crate::tools::format::HumanByte;
  24 use crate::tools::fs::{lock_dir_noblock, DirLockGuard};
  25 use crate::api2::types::{GarbageCollectionStatus, Userid};
  26 use crate::server::UPID;
  27
  28 lazy_static! {
  29     static ref DATASTORE_MAP: Mutex<HashMap<String, Arc<DataStore>>> = Mutex::new(HashMap::new());
  30 }
  31
  32 /// Datastore Management
  33 ///
  34 /// A Datastore can store severals backups, and provides the
  35 /// management interface for backup.
  36 pub struct DataStore {
  37     chunk_store: Arc<ChunkStore>,
  38     gc_mutex: Mutex<bool>,
  39     last_gc_status: Mutex<GarbageCollectionStatus>,
  40 }
  41
  42 impl DataStore {
  43
  44     pub fn lookup_datastore(name: &str) -> Result<Arc<DataStore>, Error> {
  45
  46         let (config, _digest) = datastore::config()?;
  47         let config: datastore::DataStoreConfig = config.lookup("datastore", name)?;
  48
  49         let mut map = DATASTORE_MAP.lock().unwrap();
  50
  51         if let Some(datastore) = map.get(name) {
  52             // Compare Config - if changed, create new Datastore object!
  53             if datastore.chunk_store.base == PathBuf::from(&config.path) {
  54                 return Ok(datastore.clone());
  55             }
  56         }
  57
  58         let datastore = DataStore::open(name)?;
  59
  60         let datastore = Arc::new(datastore);
  61         map.insert(name.to_string(), datastore.clone());
  62
  63         Ok(datastore)
  64     }
  65
  66     pub fn open(store_name: &str) -> Result<Self, Error> {
  67
  68         let (config, _digest) = datastore::config()?;
  69         let (_, store_config) = config.sections.get(store_name)
  70             .ok_or(format_err!("no such datastore '{}'", store_name))?;
  71
  72         let path = store_config["path"].as_str().unwrap();
  73
  74         Self::open_with_path(store_name, Path::new(path))
  75     }
  76
  77     pub fn open_with_path(store_name: &str, path: &Path) -> Result<Self, Error> {
  78         let chunk_store = ChunkStore::open(store_name, path)?;
  79
  80         let gc_status = GarbageCollectionStatus::default();
  81
  82         Ok(Self {
  83             chunk_store: Arc::new(chunk_store),
  84             gc_mutex: Mutex::new(false),
  85             last_gc_status: Mutex::new(gc_status),
  86         })
  87     }
  88
  89     pub fn get_chunk_iterator(
  90         &self,
  91     ) -> Result<
  92         impl Iterator<Item = (Result<tools::fs::ReadDirEntry, Error>, usize, bool)>,
  93         Error
  94     > {
  95         self.chunk_store.get_chunk_iterator()
  96     }
  97
  98     pub fn create_fixed_writer<P: AsRef<Path>>(&self, filename: P, size: usize, chunk_size: usize) -> Result<FixedIndexWriter, Error> {
  99
 100         let index = FixedIndexWriter::create(self.chunk_store.clone(), filename.as_ref(), size, chunk_size)?;
 101
 102         Ok(index)
 103     }
 104
 105     pub fn open_fixed_reader<P: AsRef<Path>>(&self, filename: P) -> Result<FixedIndexReader, Error> {
 106
 107         let full_path =  self.chunk_store.relative_path(filename.as_ref());
 108
 109         let index = FixedIndexReader::open(&full_path)?;
 110
 111         Ok(index)
 112     }
 113
 114     pub fn create_dynamic_writer<P: AsRef<Path>>(
 115         &self, filename: P,
 116     ) -> Result<DynamicIndexWriter, Error> {
 117
 118         let index = DynamicIndexWriter::create(
 119             self.chunk_store.clone(), filename.as_ref())?;
 120
 121         Ok(index)
 122     }
 123
 124     pub fn open_dynamic_reader<P: AsRef<Path>>(&self, filename: P) -> Result<DynamicIndexReader, Error> {
 125
 126         let full_path =  self.chunk_store.relative_path(filename.as_ref());
 127
 128         let index = DynamicIndexReader::open(&full_path)?;
 129
 130         Ok(index)
 131     }
 132
 133     pub fn open_index<P>(&self, filename: P) -> Result<Box<dyn IndexFile + Send>, Error>
 134     where
 135         P: AsRef<Path>,
 136     {
 137         let filename = filename.as_ref();
 138         let out: Box<dyn IndexFile + Send> =
 139             match archive_type(filename)? {
 140                 ArchiveType::DynamicIndex => Box::new(self.open_dynamic_reader(filename)?),
 141                 ArchiveType::FixedIndex => Box::new(self.open_fixed_reader(filename)?),
 142                 _ => bail!("cannot open index file of unknown type: {:?}", filename),
 143             };
 144         Ok(out)
 145     }
 146
 147     pub fn name(&self) -> &str {
 148         self.chunk_store.name()
 149     }
 150
 151     pub fn base_path(&self) -> PathBuf {
 152         self.chunk_store.base_path()
 153     }
 154
 155     /// Cleanup a backup directory
 156     ///
 157     /// Removes all files not mentioned in the manifest.
 158     pub fn cleanup_backup_dir(&self, backup_dir: &BackupDir, manifest: &BackupManifest
 159     ) ->  Result<(), Error> {
 160
 161         let mut full_path = self.base_path();
 162         full_path.push(backup_dir.relative_path());
 163
 164         let mut wanted_files = HashSet::new();
 165         wanted_files.insert(MANIFEST_BLOB_NAME.to_string());
 166         wanted_files.insert(CLIENT_LOG_BLOB_NAME.to_string());
 167         manifest.files().iter().for_each(|item| { wanted_files.insert(item.filename.clone()); });
 168
 169         for item in tools::fs::read_subdir(libc::AT_FDCWD, &full_path)? {
 170             if let Ok(item) = item {
 171                 if let Some(file_type) = item.file_type() {
 172                     if file_type != nix::dir::Type::File { continue; }
 173                 }
 174                 let file_name = item.file_name().to_bytes();
 175                 if file_name == b"." || file_name == b".." { continue; };
 176
 177                 if let Ok(name) = std::str::from_utf8(file_name) {
 178                     if wanted_files.contains(name) { continue; }
 179                 }
 180                 println!("remove unused file {:?}", item.file_name());
 181                 let dirfd = item.parent_fd();
 182                 let _res = unsafe { libc::unlinkat(dirfd, item.file_name().as_ptr(), 0) };
 183             }
 184         }
 185
 186         Ok(())
 187     }
 188
 189     /// Returns the absolute path for a backup_group
 190     pub fn group_path(&self, backup_group: &BackupGroup) -> PathBuf {
 191         let mut full_path = self.base_path();
 192         full_path.push(backup_group.group_path());
 193         full_path
 194     }
 195
 196     /// Returns the absolute path for backup_dir
 197     pub fn snapshot_path(&self, backup_dir: &BackupDir) -> PathBuf {
 198         let mut full_path = self.base_path();
 199         full_path.push(backup_dir.relative_path());
 200         full_path
 201     }
 202
 203     /// Remove a complete backup group including all snapshots
 204     pub fn remove_backup_group(&self, backup_group: &BackupGroup) ->  Result<(), Error> {
 205
 206         let full_path = self.group_path(backup_group);
 207
 208         let _guard = tools::fs::lock_dir_noblock(&full_path, "backup group", "possible running backup")?;
 209
 210         log::info!("removing backup group {:?}", full_path);
 211         std::fs::remove_dir_all(&full_path)
 212             .map_err(|err| {
 213                 format_err!(
 214                     "removing backup group {:?} failed - {}",
 215                     full_path,
 216                     err,
 217                 )
 218             })?;
 219
 220         Ok(())
 221     }
 222
 223     /// Remove a backup directory including all content
 224     pub fn remove_backup_dir(&self, backup_dir: &BackupDir, force: bool) ->  Result<(), Error> {
 225
 226         let full_path = self.snapshot_path(backup_dir);
 227
 228         let _guard;
 229         if !force {
 230             _guard = lock_dir_noblock(&full_path, "snapshot", "possibly running or used as base")?;
 231         }
 232
 233         log::info!("removing backup snapshot {:?}", full_path);
 234         std::fs::remove_dir_all(&full_path)
 235             .map_err(|err| {
 236                 format_err!(
 237                     "removing backup snapshot {:?} failed - {}",
 238                     full_path,
 239                     err,
 240                 )
 241             })?;
 242
 243         Ok(())
 244     }
 245
 246     /// Returns the time of the last successful backup
 247     ///
 248     /// Or None if there is no backup in the group (or the group dir does not exist).
 249     pub fn last_successful_backup(&self, backup_group: &BackupGroup) -> Result<Option<i64>, Error> {
 250         let base_path = self.base_path();
 251         let mut group_path = base_path.clone();
 252         group_path.push(backup_group.group_path());
 253
 254         if group_path.exists() {
 255             backup_group.last_successful_backup(&base_path)
 256         } else {
 257             Ok(None)
 258         }
 259     }
 260
 261     /// Returns the backup owner.
 262     ///
 263     /// The backup owner is the user who first created the backup group.
 264     pub fn get_owner(&self, backup_group: &BackupGroup) -> Result<Userid, Error> {
 265         let mut full_path = self.base_path();
 266         full_path.push(backup_group.group_path());
 267         full_path.push("owner");
 268         let owner = proxmox::tools::fs::file_read_firstline(full_path)?;
 269         Ok(owner.trim_end().parse()?) // remove trailing newline
 270     }
 271
 272     /// Set the backup owner.
 273     pub fn set_owner(
 274         &self,
 275         backup_group: &BackupGroup,
 276         userid: &Userid,
 277         force: bool,
 278     ) -> Result<(), Error> {
 279         let mut path = self.base_path();
 280         path.push(backup_group.group_path());
 281         path.push("owner");
 282
 283         let mut open_options = std::fs::OpenOptions::new();
 284         open_options.write(true);
 285         open_options.truncate(true);
 286
 287         if force {
 288             open_options.create(true);
 289         } else {
 290             open_options.create_new(true);
 291         }
 292
 293         let mut file = open_options.open(&path)
 294             .map_err(|err| format_err!("unable to create owner file {:?} - {}", path, err))?;
 295
 296         write!(file, "{}\n", userid)
 297             .map_err(|err| format_err!("unable to write owner file  {:?} - {}", path, err))?;
 298
 299         Ok(())
 300     }
 301
 302     /// Create (if it does not already exists) and lock a backup group
 303     ///
 304     /// And set the owner to 'userid'. If the group already exists, it returns the
 305     /// current owner (instead of setting the owner).
 306     ///
 307     /// This also acquires an exclusive lock on the directory and returns the lock guard.
 308     pub fn create_locked_backup_group(
 309         &self,
 310         backup_group: &BackupGroup,
 311         userid: &Userid,
 312     ) -> Result<(Userid, DirLockGuard), Error> {
 313         // create intermediate path first:
 314         let base_path = self.base_path();
 315
 316         let mut full_path = base_path.clone();
 317         full_path.push(backup_group.backup_type());
 318         std::fs::create_dir_all(&full_path)?;
 319
 320         full_path.push(backup_group.backup_id());
 321
 322         // create the last component now
 323         match std::fs::create_dir(&full_path) {
 324             Ok(_) => {
 325                 let guard = lock_dir_noblock(&full_path, "backup group", "another backup is already running")?;
 326                 self.set_owner(backup_group, userid, false)?;
 327                 let owner = self.get_owner(backup_group)?; // just to be sure
 328                 Ok((owner, guard))
 329             }
 330             Err(ref err) if err.kind() == io::ErrorKind::AlreadyExists => {
 331                 let guard = lock_dir_noblock(&full_path, "backup group", "another backup is already running")?;
 332                 let owner = self.get_owner(backup_group)?; // just to be sure
 333                 Ok((owner, guard))
 334             }
 335             Err(err) => bail!("unable to create backup group {:?} - {}", full_path, err),
 336         }
 337     }
 338
 339     /// Creates a new backup snapshot inside a BackupGroup
 340     ///
 341     /// The BackupGroup directory needs to exist.
 342     pub fn create_locked_backup_dir(&self, backup_dir: &BackupDir)
 343         -> Result<(PathBuf, bool, DirLockGuard), Error>
 344     {
 345         let relative_path = backup_dir.relative_path();
 346         let mut full_path = self.base_path();
 347         full_path.push(&relative_path);
 348
 349         let lock = ||
 350             lock_dir_noblock(&full_path, "snapshot", "internal error - tried creating snapshot that's already in use");
 351
 352         match std::fs::create_dir(&full_path) {
 353             Ok(_) => Ok((relative_path, true, lock()?)),
 354             Err(ref e) if e.kind() == io::ErrorKind::AlreadyExists => Ok((relative_path, false, lock()?)),
 355             Err(e) => Err(e.into())
 356         }
 357     }
 358
 359     pub fn list_images(&self) -> Result<Vec<PathBuf>, Error> {
 360         let base = self.base_path();
 361
 362         let mut list = vec![];
 363
 364         use walkdir::WalkDir;
 365
 366         let walker = WalkDir::new(&base).same_file_system(true).into_iter();
 367
 368         // make sure we skip .chunks (and other hidden files to keep it simple)
 369         fn is_hidden(entry: &walkdir::DirEntry) -> bool {
 370             entry.file_name()
 371                 .to_str()
 372                 .map(|s| s.starts_with("."))
 373                 .unwrap_or(false)
 374         }
 375         let handle_entry_err = |err: walkdir::Error| {
 376             if let Some(inner) = err.io_error() {
 377                 let path = err.path().unwrap_or(Path::new(""));
 378                 match inner.kind() {
 379                     io::ErrorKind::PermissionDenied => {
 380                         // only allow to skip ext4 fsck directory, avoid GC if, for example,
 381                         // a user got file permissions wrong on datastore rsync to new server
 382                         if err.depth() > 1 || !path.ends_with("lost+found") {
 383                             bail!("cannot continue garbage-collection safely, permission denied on: {}", path.display())
 384                         }
 385                     },
 386                     _ => bail!("unexpected error on datastore traversal: {} - {}", inner, path.display()),
 387                 }
 388             }
 389             Ok(())
 390         };
 391         for entry in walker.filter_entry(|e| !is_hidden(e)) {
 392             let path = match entry {
 393                 Ok(entry) => entry.into_path(),
 394                 Err(err) => {
 395                     handle_entry_err(err)?;
 396                     continue
 397                 },
 398             };
 399             if let Ok(archive_type) = archive_type(&path) {
 400                 if archive_type == ArchiveType::FixedIndex || archive_type == ArchiveType::DynamicIndex {
 401                     list.push(path);
 402                 }
 403             }
 404         }
 405
 406         Ok(list)
 407     }
 408
 409     // mark chunks  used by ``index`` as used
 410     fn index_mark_used_chunks<I: IndexFile>(
 411         &self,
 412         index: I,
 413         file_name: &Path, // only used for error reporting
 414         status: &mut GarbageCollectionStatus,
 415         worker: &dyn TaskState,
 416     ) -> Result<(), Error> {
 417
 418         status.index_file_count += 1;
 419         status.index_data_bytes += index.index_bytes();
 420
 421         for pos in 0..index.index_count() {
 422             worker.check_abort()?;
 423             tools::fail_on_shutdown()?;
 424             let digest = index.index_digest(pos).unwrap();
 425             if let Err(err) = self.chunk_store.touch_chunk(digest) {
 426                 crate::task_warn!(
 427                     worker,
 428                     "warning: unable to access chunk {}, required by {:?} - {}",
 429                     proxmox::tools::digest_to_hex(digest),
 430                     file_name,
 431                     err,
 432                 );
 433             }
 434         }
 435         Ok(())
 436     }
 437
 438     fn mark_used_chunks(
 439         &self,
 440         status: &mut GarbageCollectionStatus,
 441         worker: &dyn TaskState,
 442     ) -> Result<(), Error> {
 443
 444         let image_list = self.list_images()?;
 445
 446         let image_count = image_list.len();
 447
 448         let mut done = 0;
 449
 450         let mut last_percentage: usize = 0;
 451
 452         for path in image_list {
 453
 454             worker.check_abort()?;
 455             tools::fail_on_shutdown()?;
 456
 457             if let Ok(archive_type) = archive_type(&path) {
 458                 if archive_type == ArchiveType::FixedIndex {
 459                     let index = self.open_fixed_reader(&path)?;
 460                     self.index_mark_used_chunks(index, &path, status, worker)?;
 461                 } else if archive_type == ArchiveType::DynamicIndex {
 462                     let index = self.open_dynamic_reader(&path)?;
 463                     self.index_mark_used_chunks(index, &path, status, worker)?;
 464                 }
 465             }
 466             done += 1;
 467
 468             let percentage = done*100/image_count;
 469             if percentage > last_percentage {
 470                 crate::task_log!(
 471                     worker,
 472                     "percentage done: phase1 {}% ({} of {} index files)",
 473                     percentage,
 474                     done,
 475                     image_count,
 476                 );
 477                 last_percentage = percentage;
 478             }
 479         }
 480
 481         Ok(())
 482     }
 483
 484     pub fn last_gc_status(&self) -> GarbageCollectionStatus {
 485         self.last_gc_status.lock().unwrap().clone()
 486     }
 487
 488     pub fn garbage_collection_running(&self) -> bool {
 489         if let Ok(_) = self.gc_mutex.try_lock() { false } else { true }
 490     }
 491
 492     pub fn garbage_collection(&self, worker: &dyn TaskState, upid: &UPID) -> Result<(), Error> {
 493
 494         if let Ok(ref mut _mutex) = self.gc_mutex.try_lock() {
 495
 496             // avoids that we run GC if an old daemon process has still a
 497             // running backup writer, which is not save as we have no "oldest
 498             // writer" information and thus no safe atime cutoff
 499             let _exclusive_lock =  self.chunk_store.try_exclusive_lock()?;
 500
 501             let phase1_start_time = proxmox::tools::time::epoch_i64();
 502             let oldest_writer = self.chunk_store.oldest_writer().unwrap_or(phase1_start_time);
 503
 504             let mut gc_status = GarbageCollectionStatus::default();
 505             gc_status.upid = Some(upid.to_string());
 506
 507             crate::task_log!(worker, "Start GC phase1 (mark used chunks)");
 508
 509             self.mark_used_chunks(&mut gc_status, worker)?;
 510
 511             crate::task_log!(worker, "Start GC phase2 (sweep unused chunks)");
 512             self.chunk_store.sweep_unused_chunks(
 513                 oldest_writer,
 514                 phase1_start_time,
 515                 &mut gc_status,
 516                 worker,
 517             )?;
 518
 519             crate::task_log!(
 520                 worker,
 521                 "Removed garbage: {}",
 522                 HumanByte::from(gc_status.removed_bytes),
 523             );
 524             crate::task_log!(worker, "Removed chunks: {}", gc_status.removed_chunks);
 525             if gc_status.pending_bytes > 0 {
 526                 crate::task_log!(
 527                     worker,
 528                     "Pending removals: {} (in {} chunks)",
 529                     HumanByte::from(gc_status.pending_bytes),
 530                     gc_status.pending_chunks,
 531                 );
 532             }
 533             if gc_status.removed_bad > 0 {
 534                 crate::task_log!(worker, "Removed bad files: {}", gc_status.removed_bad);
 535             }
 536
 537             crate::task_log!(
 538                 worker,
 539                 "Original data usage: {}",
 540                 HumanByte::from(gc_status.index_data_bytes),
 541             );
 542
 543             if gc_status.index_data_bytes > 0 {
 544                 let comp_per = (gc_status.disk_bytes as f64 * 100.)/gc_status.index_data_bytes as f64;
 545                 crate::task_log!(
 546                     worker,
 547                     "On-Disk usage: {} ({:.2}%)",
 548                     HumanByte::from(gc_status.disk_bytes),
 549                     comp_per,
 550                 );
 551             }
 552
 553             crate::task_log!(worker, "On-Disk chunks: {}", gc_status.disk_chunks);
 554
 555             if gc_status.disk_chunks > 0 {
 556                 let avg_chunk = gc_status.disk_bytes/(gc_status.disk_chunks as u64);
 557                 crate::task_log!(worker, "Average chunk size: {}", HumanByte::from(avg_chunk));
 558             }
 559
 560             *self.last_gc_status.lock().unwrap() = gc_status;
 561
 562         } else {
 563             bail!("Start GC failed - (already running/locked)");
 564         }
 565
 566         Ok(())
 567     }
 568
 569     pub fn try_shared_chunk_store_lock(&self) -> Result<tools::ProcessLockSharedGuard, Error> {
 570         self.chunk_store.try_shared_lock()
 571     }
 572
 573     pub fn chunk_path(&self, digest:&[u8; 32]) -> (PathBuf, String) {
 574         self.chunk_store.chunk_path(digest)
 575     }
 576
 577     pub fn cond_touch_chunk(&self, digest: &[u8; 32], fail_if_not_exist: bool) -> Result<bool, Error> {
 578         self.chunk_store.cond_touch_chunk(digest, fail_if_not_exist)
 579     }
 580
 581     pub fn insert_chunk(
 582         &self,
 583         chunk: &DataBlob,
 584         digest: &[u8; 32],
 585     ) -> Result<(bool, u64), Error> {
 586         self.chunk_store.insert_chunk(chunk, digest)
 587     }
 588
 589     pub fn load_blob(&self, backup_dir: &BackupDir, filename: &str) -> Result<DataBlob, Error> {
 590         let mut path = self.base_path();
 591         path.push(backup_dir.relative_path());
 592         path.push(filename);
 593
 594         proxmox::try_block!({
 595             let mut file = std::fs::File::open(&path)?;
 596             DataBlob::load_from_reader(&mut file)
 597         }).map_err(|err| format_err!("unable to load blob '{:?}' - {}", path, err))
 598     }
 599
 600
 601     pub fn load_chunk(&self, digest: &[u8; 32]) -> Result<DataBlob, Error> {
 602
 603         let (chunk_path, digest_str) = self.chunk_store.chunk_path(digest);
 604
 605         proxmox::try_block!({
 606             let mut file = std::fs::File::open(&chunk_path)?;
 607             DataBlob::load_from_reader(&mut file)
 608         }).map_err(|err| format_err!(
 609             "store '{}', unable to load chunk '{}' - {}",
 610             self.name(),
 611             digest_str,
 612             err,
 613         ))
 614      }
 615
 616     pub fn load_manifest(
 617         &self,
 618         backup_dir: &BackupDir,
 619     ) -> Result<(BackupManifest, u64), Error> {
 620         let blob = self.load_blob(backup_dir, MANIFEST_BLOB_NAME)?;
 621         let raw_size = blob.raw_size();
 622         let manifest = BackupManifest::try_from(blob)?;
 623         Ok((manifest, raw_size))
 624     }
 625
 626     pub fn load_manifest_json(
 627         &self,
 628         backup_dir: &BackupDir,
 629     ) -> Result<Value, Error> {
 630         let blob = self.load_blob(backup_dir, MANIFEST_BLOB_NAME)?;
 631         // no expected digest available
 632         let manifest_data = blob.decode(None, None)?;
 633         let manifest: Value = serde_json::from_slice(&manifest_data[..])?;
 634         Ok(manifest)
 635     }
 636
 637     pub fn store_manifest(
 638         &self,
 639         backup_dir: &BackupDir,
 640         manifest: Value,
 641     ) -> Result<(), Error> {
 642         let manifest = serde_json::to_string_pretty(&manifest)?;
 643         let blob = DataBlob::encode(manifest.as_bytes(), None, true)?;
 644         let raw_data = blob.raw_data();
 645
 646         let mut path = self.base_path();
 647         path.push(backup_dir.relative_path());
 648         path.push(MANIFEST_BLOB_NAME);
 649
 650         replace_file(&path, raw_data, CreateOptions::new())?;
 651
 652         Ok(())
 653     }
 654 }