src/api2/admin/datastore.rs: add verify api

src/backup/verify.rs

@@ -0,0 +1,168 @@
+use anyhow::{bail, Error};
+
+use crate::server::WorkerTask;
+
+use super::{
+    DataStore, BackupGroup, BackupDir, BackupInfo, IndexFile,
+    ENCR_COMPR_BLOB_MAGIC_1_0, ENCRYPTED_BLOB_MAGIC_1_0,
+    FileInfo, ArchiveType, archive_type,
+};
+
+fn verify_blob(datastore: &DataStore, backup_dir: &BackupDir, info: &FileInfo) -> Result<(), Error> {
+
+    let (blob, raw_size) = datastore.load_blob(backup_dir, &info.filename)?;
+
+    let csum = openssl::sha::sha256(blob.raw_data());
+    if raw_size != info.size {
+        bail!("wrong size ({} != {})", info.size, raw_size);
+    }
+
+    if csum != info.csum {
+        bail!("wrong index checksum");
+    }
+
+    blob.verify_crc()?;
+
+    let magic = blob.magic();
+
+    if magic == &ENCR_COMPR_BLOB_MAGIC_1_0 || magic == &ENCRYPTED_BLOB_MAGIC_1_0 {
+        return Ok(());
+    }
+
+    blob.decode(None)?;
+
+    Ok(())
+}
+
+fn verify_fixed_index(datastore: &DataStore, backup_dir: &BackupDir, info: &FileInfo) -> Result<(), Error> {
+
+    let mut path = backup_dir.relative_path();
+    path.push(&info.filename);
+
+    let index = datastore.open_fixed_reader(&path)?;
+
+    let (csum, size) = index.compute_csum();
+    if size != info.size {
+        bail!("wrong size ({} != {})", info.size, size);
+    }
+
+    if csum != info.csum {
+        bail!("wrong index checksum");
+    }
+
+    for pos in 0..index.index_count() {
+        let (start, end, digest) = index.chunk_info(pos).unwrap();
+        let size = end - start;
+        datastore.verify_stored_chunk(&digest, size)?;
+    }
+
+    Ok(())
+}
+
+fn verify_dynamic_index(datastore: &DataStore, backup_dir: &BackupDir, info: &FileInfo) -> Result<(), Error> {
+    let mut path = backup_dir.relative_path();
+    path.push(&info.filename);
+
+    let index = datastore.open_dynamic_reader(&path)?;
+
+    let (csum, size) = index.compute_csum();
+    if size != info.size {
+        bail!("wrong size ({} != {})", info.size, size);
+    }
+
+    if csum != info.csum {
+        bail!("wrong index checksum");
+    }
+
+    for pos in 0..index.index_count() {
+        let chunk_info = index.chunk_info(pos).unwrap();
+        let size = chunk_info.range.end - chunk_info.range.start;
+        datastore.verify_stored_chunk(&chunk_info.digest, size)?;
+    }
+
+    Ok(())
+}
+
+/// Verify a single backup snapshot
+///
+/// This checks all archives inside a backup snapshot.
+/// Errors are logged to the worker log.
+///
+/// Return true if verify is successful
+pub fn verify_backup_dir(datastore: &DataStore, backup_dir: &BackupDir, worker: &WorkerTask) -> bool {
+
+    let manifest = match datastore.load_manifest(&backup_dir) {
+        Ok((manifest, _)) => manifest,
+        Err(err) => {
+            worker.log(format!("verify {}:{} - manifest load error: {}", datastore.name(), backup_dir, err));
+            return false;
+        }
+    };
+
+    worker.log(format!("verify {}:{}", datastore.name(), backup_dir));
+
+    let mut error_count = 0;
+
+    for info in manifest.files() {
+        let result = proxmox::try_block!({
+            worker.log(format!("  check {}", info.filename));
+            match archive_type(&info.filename)? {
+                ArchiveType::FixedIndex => verify_fixed_index(&datastore, &backup_dir, info),
+                ArchiveType::DynamicIndex => verify_dynamic_index(&datastore, &backup_dir, info),
+                ArchiveType::Blob => verify_blob(&datastore, &backup_dir, info),
+            }
+        });
+        if let Err(err) = result {
+            worker.log(format!("verify {}:{}/{} failed: {}", datastore.name(), backup_dir, info.filename, err));
+            error_count += 1;
+        }
+    }
+
+    error_count == 0
+}
+
+pub fn verify_backup_group(datastore: &DataStore, group: &BackupGroup, worker: &WorkerTask) -> bool {
+
+    let mut list = match group.list_backups(&datastore.base_path()) {
+        Ok(list) => list,
+        Err(err) => {
+            worker.log(format!("verify group {}:{} - unable to list backups: {}", datastore.name(), group, err));
+            return false;
+        }
+    };
+
+    worker.log(format!("verify group {}:{}", datastore.name(), group));
+
+    let mut error_count = 0;
+
+    BackupInfo::sort_list(&mut list, false); // newest first
+    for info in list {
+        if !verify_backup_dir(datastore, &info.backup_dir, worker) {
+            error_count += 1;
+        }
+    }
+
+    error_count == 0
+}
+
+pub fn verify_all_backups(datastore: &DataStore, worker: &WorkerTask) -> bool {
+
+    let list = match BackupGroup::list_groups(&datastore.base_path()) {
+        Ok(list) => list,
+        Err(err) => {
+            worker.log(format!("verify datastore {} - unable to list backups: {}", datastore.name(), err));
+            return false;
+        }
+    };
+
+    worker.log(format!("verify datastore {}", datastore.name()));
+
+    let mut error_count = 0;
+    for group in list {
+        if !verify_backup_group(datastore, &group, worker) {
+            error_count += 1;
+        }
+    }
+
+    error_count == 0
+}