Merge branch 'master' of ssh://proxdev.maurer-it.com/rust/proxmox-backup

src/api2/access/acl.rs

@@ -72,7 +72,7 @@ fn extract_acl_node_data(
         }
     }
     for (group, roles) in &node.groups {
-        if let Some(_) = token_user {
+        if token_user.is_some() {
             continue;
         }
 
@@ -210,7 +210,7 @@ pub fn update_acl(
 
     let top_level_privs = user_info.lookup_privs(&current_auth_id, &["access", "acl"]);
     if top_level_privs & PRIV_PERMISSIONS_MODIFY == 0 {
-        if let Some(_) = group {
+        if group.is_some() {
             bail!("Unprivileged users are not allowed to create group ACL item.");
         }
 

src/api2/access/role.rs

@@ -46,7 +46,7 @@ fn list_roles() -> Result<Value, Error> {
         let mut priv_list = Vec::new();
         for (name, privilege) in PRIVILEGES.iter() {
             if privs & privilege > 0 {
-                priv_list.push(name.clone());
+                priv_list.push(name);
             }
         }
         list.push(json!({ "roleid": role, "privs": priv_list, "comment": comment }));

src/api2/access/tfa.rs

@@ -331,13 +331,11 @@ fn list_tfa(rpcenv: &mut dyn RpcEnvironment) -> Result<Vec<TfaUser>, Error> {
                 entries: to_data(data),
             });
         }
-    } else {
-        if let Some(data) = { tfa_data }.remove(authid.user()) {
-            out.push(TfaUser {
-                userid: authid.into(),
-                entries: to_data(data),
-            });
-        }
+    } else if let Some(data) = { tfa_data }.remove(authid.user()) {
+        out.push(TfaUser {
+            userid: authid.into(),
+            entries: to_data(data),
+        });
     }
 
     Ok(out)

src/api2/access/user.rs

@@ -169,7 +169,7 @@ pub fn list_users(
             })
             .collect()
     } else {
-        iter.map(|user: user::User| UserWithTokens::new(user))
+        iter.map(UserWithTokens::new)
             .collect()
     };
 
@@ -230,7 +230,7 @@ pub fn create_user(
 
     let (mut config, _digest) = user::config()?;
 
-    if let Some(_) = config.sections.get(user.userid.as_str()) {
+    if config.sections.get(user.userid.as_str()).is_some() {
         bail!("user '{}' already exists.", user.userid);
     }
 
@@ -595,7 +595,7 @@ pub fn generate_token(
     let tokenid = Authid::from((userid.clone(), Some(tokenname.clone())));
     let tokenid_string = tokenid.to_string();
 
-    if let Some(_) = config.sections.get(&tokenid_string) {
+    if config.sections.get(&tokenid_string).is_some() {
         bail!("token '{}' for user '{}' already exists.", tokenname.as_str(), userid);
     }
 
@@ -603,7 +603,7 @@ pub fn generate_token(
     token_shadow::set_secret(&tokenid, &secret)?;
 
     let token = user::ApiToken {
-        tokenid: tokenid.clone(),
+        tokenid,
         comment,
         enable,
         expire,

src/api2/admin/datastore.rs

@@ -440,8 +440,8 @@ pub fn list_snapshots (
                 let files = info
                         .files
                         .into_iter()
-                        .map(|x| BackupContent {
-                            filename: x.to_string(),
+                        .map(|filename| BackupContent {
+                            filename,
                             size: None,
                             crypt_mode: None,
                         })
@@ -662,11 +662,11 @@ pub fn verify(
         _ => bail!("parameters do not specify a backup group or snapshot"),
     }
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         worker_type,
-        Some(worker_id.clone()),
+        Some(worker_id),
         auth_id.clone(),
         to_stdout,
         move |worker| {
@@ -711,7 +711,7 @@ pub fn verify(
 
                 verify_all_backups(datastore, worker.clone(), worker.upid(), owner, None)?
             };
-            if failed_dirs.len() > 0 {
+            if !failed_dirs.is_empty() {
                 worker.log("Failed to verify the following snapshots/groups:");
                 for dir in failed_dirs {
                     worker.log(format!("\t{}", dir));
@@ -855,7 +855,7 @@ fn prune(
 
 
     // We use a WorkerTask just to have a task log, but run synchrounously
-    let worker = WorkerTask::new("prune", Some(worker_id), auth_id.clone(), true)?;
+    let worker = WorkerTask::new("prune", Some(worker_id), auth_id, true)?;
 
     if keep_all {
         worker.log("No prune selection - keeping all files.");
@@ -935,7 +935,7 @@ fn start_garbage_collection(
     let job =  Job::new("garbage_collection", &store)
         .map_err(|_| format_err!("garbage collection already running"))?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = crate::server::do_garbage_collection_job(job, datastore, &auth_id, None, to_stdout)
         .map_err(|err| format_err!("unable to start garbage collection job on datastore {} - {}", store, err))?;
@@ -1009,7 +1009,7 @@ fn get_datastore_list(
         }
     }
 
-    Ok(list.into())
+    Ok(list)
 }
 
 #[sortable]
@@ -1066,7 +1066,7 @@ fn download_file(
             .map_err(|err| http_err!(BAD_REQUEST, "File open failed: {}", err))?;
 
         let payload = tokio_util::codec::FramedRead::new(file, tokio_util::codec::BytesCodec::new())
-            .map_ok(|bytes| hyper::body::Bytes::from(bytes.freeze()))
+            .map_ok(|bytes| bytes.freeze())
             .map_err(move |err| {
                 eprintln!("error during streaming of '{:?}' - {}", &path, err);
                 err
@@ -1341,10 +1341,10 @@ fn catalog(
 
     if filepath != "root" {
         components = base64::decode(filepath)?;
-        if components.len() > 0 && components[0] == '/' as u8 {
+        if !components.is_empty() && components[0] == b'/' {
             components.remove(0);
         }
-        for component in components.split(|c| *c == '/' as u8) {
+        for component in components.split(|c| *c == b'/') {
             if let Some(entry) = catalog_reader.lookup(&current, component)? {
                 current = entry;
             } else {
@@ -1357,7 +1357,7 @@ fn catalog(
 
     for direntry in catalog_reader.read_dir(&current)? {
         let mut components = components.clone();
-        components.push('/' as u8);
+        components.push(b'/');
         components.extend(&direntry.name);
         let path = base64::encode(components);
         let text = String::from_utf8_lossy(&direntry.name);
@@ -1487,13 +1487,13 @@ fn pxar_file_download(
         check_priv_or_backup_owner(&datastore, backup_dir.group(), &auth_id, PRIV_DATASTORE_READ)?;
 
         let mut components = base64::decode(&filepath)?;
-        if components.len() > 0 && components[0] == '/' as u8 {
+        if !components.is_empty() && components[0] == b'/' {
             components.remove(0);
         }
 
-        let mut split = components.splitn(2, |c| *c == '/' as u8);
+        let mut split = components.splitn(2, |c| *c == b'/');
         let pxar_name = std::str::from_utf8(split.next().unwrap())?;
-        let file_path = split.next().ok_or(format_err!("filepath looks strange '{}'", filepath))?;
+        let file_path = split.next().ok_or_else(|| format_err!("filepath looks strange '{}'", filepath))?;
         let (manifest, files) = read_backup_index(&datastore, &backup_dir)?;
         for file in files {
             if file.filename == pxar_name && file.crypt_mode == Some(CryptMode::Encrypt) {
@@ -1520,7 +1520,7 @@ fn pxar_file_download(
         let root = decoder.open_root().await?;
         let file = root
             .lookup(OsStr::from_bytes(file_path)).await?
-            .ok_or(format_err!("error opening '{:?}'", file_path))?;
+            .ok_or_else(|| format_err!("error opening '{:?}'", file_path))?;
 
         let body = match file.kind() {
             EntryKind::File { .. } => Body::wrap_stream(

src/api2/admin/sync.rs

@@ -58,7 +58,7 @@ pub fn list_sync_jobs(
             }
         })
         .filter(|job: &SyncJobStatus| {
-            let as_config: SyncJobConfig = job.clone().into();
+            let as_config: SyncJobConfig = job.into();
             check_sync_job_read_access(&user_info, &auth_id, &as_config)
         }).collect();
 
@@ -81,13 +81,13 @@ pub fn list_sync_jobs(
         job.last_run_state = state;
         job.last_run_endtime = endtime;
 
-        let last = job.last_run_endtime.unwrap_or_else(|| starttime);
+        let last = job.last_run_endtime.unwrap_or(starttime);
 
         job.next_run = (|| -> Option<i64> {
             let schedule = job.schedule.as_ref()?;
             let event = parse_calendar_event(&schedule).ok()?;
             // ignore errors
-            compute_next_event(&event, last, false).unwrap_or_else(|_| None)
+            compute_next_event(&event, last, false).unwrap_or(None)
         })();
     }
 

src/api2/admin/verify.rs

@@ -86,13 +86,13 @@ pub fn list_verification_jobs(
         job.last_run_state = state;
         job.last_run_endtime = endtime;
 
-        let last = job.last_run_endtime.unwrap_or_else(|| starttime);
+        let last = job.last_run_endtime.unwrap_or(starttime);
 
         job.next_run = (|| -> Option<i64> {
             let schedule = job.schedule.as_ref()?;
             let event = parse_calendar_event(&schedule).ok()?;
             // ignore errors
-            compute_next_event(&event, last, false).unwrap_or_else(|_| None)
+            compute_next_event(&event, last, false).unwrap_or(None)
         })();
     }
 

src/api2/backup.rs

@@ -138,7 +138,7 @@ async move {
         }
     };
 
-    let backup_dir = BackupDir::with_group(backup_group.clone(), backup_time)?;
+    let backup_dir = BackupDir::with_group(backup_group, backup_time)?;
 
     let _last_guard = if let Some(last) = &last_backup {
         if backup_dir.backup_time() <= last.backup_dir.backup_time() {

src/api2/backup/environment.rs

@@ -465,7 +465,7 @@ impl BackupEnvironment {
         state.ensure_unfinished()?;
 
         // test if all writer are correctly closed
-        if state.dynamic_writers.len() != 0 || state.fixed_writers.len() != 0 {
+        if !state.dynamic_writers.is_empty() || !state.fixed_writers.is_empty() {
             bail!("found open index writer - unable to finish backup");
         }
 

src/api2/config/datastore.rs

@@ -120,11 +120,11 @@ pub fn create_datastore(param: Value) -> Result<(), Error> {
 
     let _lock = open_file_locked(datastore::DATASTORE_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)?;
 
-    let datastore: datastore::DataStoreConfig = serde_json::from_value(param.clone())?;
+    let datastore: datastore::DataStoreConfig = serde_json::from_value(param)?;
 
     let (mut config, _digest) = datastore::config()?;
 
-    if let Some(_) = config.sections.get(&datastore.name) {
+    if config.sections.get(&datastore.name).is_some() {
         bail!("datastore '{}' already exists.", datastore.name);
     }
 

src/api2/config/remote.rs

@@ -96,13 +96,13 @@ pub fn create_remote(password: String, param: Value) -> Result<(), Error> {
 
     let _lock = open_file_locked(remote::REMOTE_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)?;
 
-    let mut data = param.clone();
+    let mut data = param;
     data["password"] = Value::from(base64::encode(password.as_bytes()));
     let remote: remote::Remote = serde_json::from_value(data)?;
 
     let (mut config, _digest) = remote::config()?;
 
-    if let Some(_) = config.sections.get(&remote.name) {
+    if config.sections.get(&remote.name).is_some() {
         bail!("remote '{}' already exists.", remote.name);
     }
 

src/api2/config/sync.rs

@@ -154,14 +154,14 @@ pub fn create_sync_job(
 
     let _lock = open_file_locked(sync::SYNC_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)?;
 
-    let sync_job: sync::SyncJobConfig = serde_json::from_value(param.clone())?;
+    let sync_job: sync::SyncJobConfig = serde_json::from_value(param)?;
     if !check_sync_job_modify_access(&user_info, &auth_id, &sync_job) {
         bail!("permission check failed");
     }
 
     let (mut config, _digest) = sync::config()?;
 
-    if let Some(_) = config.sections.get(&sync_job.id) {
+    if config.sections.get(&sync_job.id).is_some() {
         bail!("job '{}' already exists.", sync_job.id);
     }
 
@@ -514,7 +514,7 @@ acl:1:/remote/remote1/remotestore1:write@pbs:RemoteSyncOperator
 
     // unless they have Datastore.Modify as well
     job.store = "localstore3".to_string();
-    job.owner = Some(read_auth_id.clone());
+    job.owner = Some(read_auth_id);
     assert_eq!(check_sync_job_modify_access(&user_info, &write_auth_id, &job), true);
     job.owner = None;
     assert_eq!(check_sync_job_modify_access(&user_info, &write_auth_id, &job), true);

src/api2/config/verify.rs

@@ -98,7 +98,7 @@ pub fn create_verification_job(
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
     let user_info = CachedUserInfo::new()?;
 
-    let verification_job: verify::VerificationJobConfig = serde_json::from_value(param.clone())?;
+    let verification_job: verify::VerificationJobConfig = serde_json::from_value(param)?;
 
     user_info.check_privs(&auth_id, &["datastore", &verification_job.store], PRIV_DATASTORE_VERIFY, false)?;
 
@@ -106,7 +106,7 @@ pub fn create_verification_job(
 
     let (mut config, _digest) = verify::config()?;
 
-    if let Some(_) = config.sections.get(&verification_job.id) {
+    if config.sections.get(&verification_job.id).is_some() {
         bail!("job '{}' already exists.", verification_job.id);
     }
 

src/api2/helpers.rs

@@ -16,7 +16,7 @@ pub async fn create_download_response(path: PathBuf) -> Result<Response<Body>, E
     };
 
     let payload = tokio_util::codec::FramedRead::new(file, tokio_util::codec::BytesCodec::new())
-        .map_ok(|bytes| hyper::body::Bytes::from(bytes.freeze()));
+        .map_ok(|bytes| bytes.freeze());
 
     let body = Body::wrap_stream(payload);
 

src/api2/node.rs

@@ -121,7 +121,7 @@ async fn termproxy(
         )?;
 
     let mut command = Vec::new();
-    match cmd.as_ref().map(|x| x.as_str()) {
+    match cmd.as_deref() {
         Some("login") | None => {
             command.push("login");
             if userid == "root@pam" {

src/api2/node/apt.rs

@@ -35,18 +35,15 @@ use crate::api2::types::{Authid, APTUpdateInfo, NODE_SCHEMA, UPID_SCHEMA};
 /// List available APT updates
 fn apt_update_available(_param: Value) -> Result<Value, Error> {
 
-    match apt::pkg_cache_expired() {
-        Ok(false) => {
-            if let Ok(Some(cache)) = apt::read_pkg_state() {
-                return Ok(json!(cache.package_status));
-            }
-        },
-        _ => (),
+    if let Ok(false) = apt::pkg_cache_expired() {
+        if let Ok(Some(cache)) = apt::read_pkg_state() {
+            return Ok(json!(cache.package_status));
+        }
     }
 
     let cache = apt::update_cache()?;
 
-    return Ok(json!(cache.package_status));
+    Ok(json!(cache.package_status))
 }
 
 fn do_apt_update(worker: &WorkerTask, quiet: bool) -> Result<(), Error> {
@@ -90,8 +87,8 @@ fn do_apt_update(worker: &WorkerTask, quiet: bool) -> Result<(), Error> {
                 type: bool,
                 description: r#"Send notification mail about new package updates availanle to the
                     email address configured for 'root@pam')."#,
-                optional: true,
                 default: false,
+                optional: true,
             },
             quiet: {
                 description: "Only produces output suitable for logging, omitting progress indicators.",
@@ -116,7 +113,7 @@ pub fn apt_update_database(
 ) -> Result<String, Error> {
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
     // FIXME: change to non-option in signature and drop below once we have proxmox-api-macro 0.2.3
     let quiet = quiet.unwrap_or(API_METHOD_APT_UPDATE_DATABASE_PARAM_DEFAULT_QUIET);
     let notify = notify.unwrap_or(API_METHOD_APT_UPDATE_DATABASE_PARAM_DEFAULT_NOTIFY);
@@ -196,7 +193,7 @@ fn apt_get_changelog(
         }
     }, Some(&name));
 
-    if pkg_info.len() == 0 {
+    if pkg_info.is_empty() {
         bail!("Package '{}' not found", name);
     }
 
@@ -205,7 +202,7 @@ fn apt_get_changelog(
     if changelog_url.starts_with("http://download.proxmox.com/") {
         let changelog = crate::tools::runtime::block_on(http::get_string(changelog_url, None))
             .map_err(|err| format_err!("Error downloading changelog from '{}': {}", changelog_url, err))?;
-        return Ok(json!(changelog));
+        Ok(json!(changelog))
 
     } else if changelog_url.starts_with("https://enterprise.proxmox.com/") {
         let sub = match subscription::read_subscription()? {
@@ -229,7 +226,7 @@ fn apt_get_changelog(
 
         let changelog = crate::tools::runtime::block_on(http::get_string(changelog_url, Some(&auth_header)))
             .map_err(|err| format_err!("Error downloading changelog from '{}': {}", changelog_url, err))?;
-        return Ok(json!(changelog));
+        Ok(json!(changelog))
 
     } else {
         let mut command = std::process::Command::new("apt-get");
@@ -237,7 +234,7 @@ fn apt_get_changelog(
         command.arg("-qq"); // don't display download progress
         command.arg(name);
         let output = crate::tools::run_command(command, None)?;
-        return Ok(json!(output));
+        Ok(json!(output))
     }
 }
 

src/api2/node/disks.rs

@@ -138,7 +138,7 @@ pub fn initialize_disk(
     rpcenv: &mut dyn RpcEnvironment,
 ) -> Result<Value, Error> {
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 

src/api2/node/disks/directory.rs

@@ -132,7 +132,7 @@ pub fn create_datastore_disk(
     rpcenv: &mut dyn RpcEnvironment,
 ) -> Result<String, Error> {
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
@@ -164,7 +164,7 @@ pub fn create_datastore_disk(
 
             let manager = DiskManage::new();
 
-            let disk = manager.clone().disk_by_name(&disk)?;
+            let disk = manager.disk_by_name(&disk)?;
 
             let partition = create_single_linux_partition(&disk)?;
             create_file_system(&partition, filesystem)?;
@@ -212,8 +212,7 @@ pub fn delete_datastore_disk(name: String) -> Result<(), Error> {
     let (config, _) = crate::config::datastore::config()?;
     let datastores: Vec<DataStoreConfig> = config.convert_to_typed_array("datastore")?;
     let conflicting_datastore: Option<DataStoreConfig> = datastores.into_iter()
-        .filter(|ds| ds.path == path)
-        .next();
+        .find(|ds| ds.path == path);
 
     if let Some(conflicting_datastore) = conflicting_datastore {
         bail!("Can't remove '{}' since it's required by datastore '{}'",

src/api2/node/disks/zfs.rs

@@ -254,7 +254,7 @@ pub fn create_zpool(
     rpcenv: &mut dyn RpcEnvironment,
 ) -> Result<String, Error> {
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 

src/api2/node/subscription.rs

@@ -137,7 +137,7 @@ pub fn set_subscription(
 
     let server_id = tools::get_hardware_address()?;
 
-    let info = subscription::check_subscription(key, server_id.to_owned())?;
+    let info = subscription::check_subscription(key, server_id)?;
 
     subscription::write_subscription(info)
         .map_err(|e| format_err!("Error writing subscription status - {}", e))?;

src/api2/node/tasks.rs

@@ -513,7 +513,7 @@ pub fn list_tasks(
         .collect();
 
     let mut count = result.len() + start as usize;
-    if result.len() > 0 && result.len() >= limit { // we have a 'virtual' entry as long as we have any new
+    if !result.is_empty() && result.len() >= limit { // we have a 'virtual' entry as long as we have any new
         count += 1;
     }
 

src/api2/pull.rs

@@ -88,7 +88,7 @@ pub fn do_sync_job(
             let worker_future = async move {
 
                 let delete = sync_job.remove_vanished.unwrap_or(true);
-                let sync_owner = sync_job.owner.unwrap_or(Authid::root_auth_id().clone());
+                let sync_owner = sync_job.owner.unwrap_or_else(|| Authid::root_auth_id().clone());
                 let (client, src_repo, tgt_store) = get_pull_parameters(&sync_job.store, &sync_job.remote, &sync_job.remote_store).await?;
 
                 worker.log(format!("Starting datastore sync job '{}'", job_id));

src/api2/reader.rs

@@ -150,16 +150,16 @@ fn upgrade_to_backup_reader_protocol(
                     }
                 });
             let abort_future = abort_future
-                .map(|_| Err(format_err!("task aborted")));
+                .map(|_| -> Result<(), anyhow::Error> { Err(format_err!("task aborted")) });
 
             use futures::future::Either;
             futures::future::select(req_fut, abort_future)
                 .map(move |res| {
                     let _guard = _guard;
                     match res {
-                        Either::Left((Ok(res), _)) => Ok(res),
+                        Either::Left((Ok(_), _)) => Ok(()),
                         Either::Left((Err(err), _)) => Err(err),
-                        Either::Right((Ok(res), _)) => Ok(res),
+                        Either::Right((Ok(_), _)) => Ok(()),
                         Either::Right((Err(err), _)) => Err(err),
                     }
                 })

src/api2/status.rs

@@ -127,49 +127,46 @@ fn datastore_status(
             rrd_mode,
         );
 
-        match (total_res, used_res) {
-            (Some((start, reso, total_list)), Some((_, _, used_list))) => {
-                let mut usage_list: Vec<f64> = Vec::new();
-                let mut time_list: Vec<u64> = Vec::new();
-                let mut history = Vec::new();
+        if let (Some((start, reso, total_list)), Some((_, _, used_list))) = (total_res, used_res) {
+            let mut usage_list: Vec<f64> = Vec::new();
+            let mut time_list: Vec<u64> = Vec::new();
+            let mut history = Vec::new();
 
-                for (idx, used) in used_list.iter().enumerate() {
-                    let total = if idx < total_list.len() {
-                        total_list[idx]
+            for (idx, used) in used_list.iter().enumerate() {
+                let total = if idx < total_list.len() {
+                    total_list[idx]
+                } else {
+                    None
+                };
+
+                match (total, used) {
+                    (Some(total), Some(used)) if total != 0.0 => {
+                        time_list.push(start + (idx as u64)*reso);
+                        let usage = used/total;
+                        usage_list.push(usage);
+                        history.push(json!(usage));
+                    },
+                    _ => {
+                        history.push(json!(null))
+                    }
+                }
+            }
+
+            entry["history-start"] = start.into();
+            entry["history-delta"] = reso.into();
+            entry["history"] = history.into();
+
+            // we skip the calculation for datastores with not enough data
+            if usage_list.len() >= 7 {
+                if let Some((a,b)) = linear_regression(&time_list, &usage_list) {
+                    if b != 0.0 {
+                        let estimate = (1.0 - a) / b;
+                        entry["estimated-full-date"] = Value::from(estimate.floor() as u64);
                     } else {
-                        None
-                    };
-
-                    match (total, used) {
-                        (Some(total), Some(used)) if total != 0.0 => {
-                            time_list.push(start + (idx as u64)*reso);
-                            let usage = used/total;
-                            usage_list.push(usage);
-                            history.push(json!(usage));
-                        },
-                        _ => {
-                            history.push(json!(null))
-                        }
+                        entry["estimated-full-date"] = Value::from(0);
                     }
                 }
-
-                entry["history-start"] = start.into();
-                entry["history-delta"] = reso.into();
-                entry["history"] = history.into();
-
-                // we skip the calculation for datastores with not enough data
-                if usage_list.len() >= 7 {
-                    if let Some((a,b)) = linear_regression(&time_list, &usage_list) {
-                        if b != 0.0 {
-                            let estimate = (1.0 - a) / b;
-                            entry["estimated-full-date"] = Value::from(estimate.floor() as u64);
-                        } else {
-                            entry["estimated-full-date"] = Value::from(0);
-                        }
-                    }
-                }
-            },
-            _ => {},
+            }
         }
 
         list.push(entry);

src/api2/tape/backup.rs

@@ -87,14 +87,14 @@ pub fn backup(
     // early check before starting worker
     check_drive_exists(&drive_config, &pool_config.drive)?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let eject_media = eject_media.unwrap_or(false);
     let export_media_set = export_media_set.unwrap_or(false);
 
     let upid_str = WorkerTask::new_thread(
         "tape-backup",
-        Some(store.clone()),
+        Some(store),
         auth_id,
         to_stdout,
         move |worker| {

src/api2/tape/drive.rs

@@ -226,7 +226,7 @@ pub fn erase_media(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "erase-media",
@@ -267,7 +267,7 @@ pub fn rewind(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "rewind-media",
@@ -353,7 +353,7 @@ pub fn label_media(
 
     let (config, _digest) = config::drive::config()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "label-media",
@@ -595,7 +595,7 @@ pub fn clean_drive(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "clean-drive",
@@ -722,7 +722,7 @@ pub fn update_inventory(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "inventory-update",
@@ -735,7 +735,7 @@ pub fn update_inventory(
 
             let label_text_list = changer.online_media_label_texts()?;
             if label_text_list.is_empty() {
-                worker.log(format!("changer device does not list any media labels"));
+                worker.log("changer device does not list any media labels".to_string());
             }
 
             let state_path = Path::new(TAPE_STATUS_DIR);
@@ -752,11 +752,9 @@ pub fn update_inventory(
 
                 let label_text = label_text.to_string();
 
-                if !read_all_labels.unwrap_or(false) {
-                    if let Some(_) = inventory.find_media_by_label_text(&label_text) {
-                        worker.log(format!("media '{}' already inventoried", label_text));
-                        continue;
-                    }
+                if !read_all_labels.unwrap_or(false) && inventory.find_media_by_label_text(&label_text).is_some() {
+                    worker.log(format!("media '{}' already inventoried", label_text));
+                    continue;
                 }
 
                 if let Err(err) = changer.load_media(&label_text) {
@@ -824,7 +822,7 @@ pub fn barcode_label_media(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "barcode-label-media",
@@ -1002,7 +1000,7 @@ pub fn catalog_media(
 
     let auth_id: Authid = rpcenv.get_auth_id().unwrap().parse()?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "catalog-media",
@@ -1060,10 +1058,8 @@ pub fn catalog_media(
 
             let _lock = MediaPool::lock(status_path, &pool)?;
 
-            if MediaCatalog::exists(status_path, &media_id.label.uuid) {
-                if !force {
-                    bail!("media catalog exists (please use --force to overwrite)");
-                }
+            if MediaCatalog::exists(status_path, &media_id.label.uuid) && !force {
+                bail!("media catalog exists (please use --force to overwrite)");
             }
 
             restore_media(&worker, &mut drive, &media_id, None, verbose)?;

src/api2/tape/media.rs

@@ -197,7 +197,6 @@ pub fn destroy_media(label_text: String, force: Option<bool>,) -> Result<(), Err
     }
 
     let uuid = media_id.label.uuid.clone();
-    drop(media_id);
 
     inventory.remove_media(&uuid)?;
 

src/api2/tape/restore.rs

@@ -115,7 +115,7 @@ pub fn restore(
     // early check before starting worker
     check_drive_exists(&drive_config, &pool_config.drive)?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let upid_str = WorkerTask::new_thread(
         "tape-restore",
@@ -128,7 +128,7 @@ pub fn restore(
 
             let members = inventory.compute_media_set_members(&media_set_uuid)?;
 
-            let media_list = members.media_list().clone();
+            let media_list = members.media_list();
 
             let mut media_id_list = Vec::new();
 
@@ -234,7 +234,6 @@ pub fn restore_media(
             Some(reader) => reader,
         };
 
-        let target = target.clone();
         restore_archive(worker, reader, current_file_number, target, &mut catalog, verbose)?;
     }
 
@@ -344,36 +343,26 @@ fn restore_chunk_archive<'a>(
     let mut decoder = ChunkArchiveDecoder::new(reader);
 
     let result: Result<_, Error> = proxmox::try_block!({
-        loop {
-            match decoder.next_chunk()? {
-                Some((digest, blob)) => {
+        while let Some((digest, blob)) = decoder.next_chunk()? {
+            if let Some(datastore) = datastore {
+                let chunk_exists = datastore.cond_touch_chunk(&digest, false)?;
+                if !chunk_exists {
+                    blob.verify_crc()?;
 
-                    if let Some(datastore) = datastore {
-                        let chunk_exists = datastore.cond_touch_chunk(&digest, false)?;
-                        if !chunk_exists {
-                            blob.verify_crc()?;
-
-                            if blob.crypt_mode()? == CryptMode::None {
-                                blob.decode(None, Some(&digest))?; // verify digest
-                            }
-                            if verbose {
-                                worker.log(format!("Insert chunk: {}", proxmox::tools::digest_to_hex(&digest)));
-                            }
-                            datastore.insert_chunk(&blob, &digest)?;
-                        } else {
-                            if verbose {
-                                worker.log(format!("Found existing chunk: {}", proxmox::tools::digest_to_hex(&digest)));
-                            }
-                        }
-                    } else {
-                        if verbose {
-                            worker.log(format!("Found chunk: {}", proxmox::tools::digest_to_hex(&digest)));
-                        }
+                    if blob.crypt_mode()? == CryptMode::None {
+                        blob.decode(None, Some(&digest))?; // verify digest
                     }
-                    chunks.push(digest);
+                    if verbose {
+                        worker.log(format!("Insert chunk: {}", proxmox::tools::digest_to_hex(&digest)));
+                    }
+                    datastore.insert_chunk(&blob, &digest)?;
+                } else if verbose {
+                    worker.log(format!("Found existing chunk: {}", proxmox::tools::digest_to_hex(&digest)));
                 }
-                None => break,
+            } else if verbose {
+                worker.log(format!("Found chunk: {}", proxmox::tools::digest_to_hex(&digest)));
             }
+            chunks.push(digest);
         }
         Ok(())
     });
@@ -390,7 +379,7 @@ fn restore_chunk_archive<'a>(
 
             // check if this is an aborted stream without end marker
             if let Ok(false) = reader.has_end_marker() {
-                worker.log(format!("missing stream end marker"));
+                worker.log("missing stream end marker".to_string());
                 return Ok(None);
             }
 
@@ -407,7 +396,7 @@ fn restore_snapshot_archive<'a>(
 
     let mut decoder = pxar::decoder::sync::Decoder::from_std(reader)?;
     match try_restore_snapshot_archive(&mut decoder, snapshot_path) {
-        Ok(()) => return Ok(true),
+        Ok(()) => Ok(true),
         Err(err) => {
             let reader = decoder.input();
 
@@ -422,7 +411,7 @@ fn restore_snapshot_archive<'a>(
             }
 
             // else the archive is corrupt
-            return Err(err);
+            Err(err)
         }
     }
 }

src/api2/types/mod.rs

@@ -1092,7 +1092,7 @@ fn test_cert_fingerprint_schema() -> Result<(), anyhow::Error> {
     ];
 
     for fingerprint in invalid_fingerprints.iter() {
-        if let Ok(_) = parse_simple_value(fingerprint, &schema) {
+        if parse_simple_value(fingerprint, &schema).is_ok() {
             bail!("test fingerprint '{}' failed -  got Ok() while exception an error.", fingerprint);
         }
     }
@@ -1133,7 +1133,7 @@ fn test_proxmox_user_id_schema() -> Result<(), anyhow::Error> {
     ];
 
     for name in invalid_user_ids.iter() {
-        if let Ok(_) = parse_simple_value(name, &Userid::API_SCHEMA) {
+        if parse_simple_value(name, &Userid::API_SCHEMA).is_ok() {
             bail!("test userid '{}' failed -  got Ok() while exception an error.", name);
         }
     }

src/api2/types/userid.rs

@@ -277,7 +277,7 @@ impl PartialEq<&str> for RealmRef {
 
 impl PartialEq<RealmRef> for Realm {
     fn eq(&self, rhs: &RealmRef) -> bool {
-        self.0 == &rhs.0
+        self.0 == rhs.0
     }
 }
 
@@ -638,7 +638,7 @@ impl std::str::FromStr for Authid {
             .iter()
             .rposition(|&b| b == b'!')
             .map(|pos| if pos < name_len { id.len() } else { pos })
-            .unwrap_or(id.len());
+            .unwrap_or_else(|| id.len());
 
         if realm_end == id.len() - 1 {
             bail!("empty token name in userid");
@@ -670,7 +670,7 @@ impl TryFrom<String> for Authid {
             .iter()
             .rposition(|&b| b == b'!')
             .map(|pos| if pos < name_len { data.len() } else { pos })
-            .unwrap_or(data.len());
+            .unwrap_or_else(|| data.len());
 
         if realm_end == data.len() - 1 {
             bail!("empty token name in userid");

src/backup/async_index_reader.rs

@@ -97,7 +97,7 @@ where
                     let info = this
                         .index
                         .chunk_info(idx)
-                        .ok_or(io_format_err!("could not get digest"))?;
+                        .ok_or_else(|| io_format_err!("could not get digest"))?;
 
                     this.current_chunk_offset = offset;
                     this.current_chunk_idx = idx;

src/backup/catalog.rs

@@ -137,18 +137,12 @@ impl DirEntry {
 
     /// Check if DirEntry is a directory
     pub fn is_directory(&self) -> bool {
-        match self.attr {
-            DirEntryAttribute::Directory { .. } => true,
-            _ => false,
-        }
+        matches!(self.attr, DirEntryAttribute::Directory { .. })
     }
 
     /// Check if DirEntry is a symlink
     pub fn is_symlink(&self) -> bool {
-        match self.attr {
-            DirEntryAttribute::Symlink { .. } => true,
-            _ => false,
-        }
+        matches!(self.attr, DirEntryAttribute::Symlink { .. })
     }
 }
 
@@ -591,6 +585,7 @@ impl <R: Read + Seek> CatalogReader<R> {
 ///
 /// Stores 7 bits per byte, Bit 8 indicates the end of the sequence (when not set).
 /// If the value is negative, we end with a zero byte (0x00).
+#[allow(clippy::neg_multiply)]
 pub fn catalog_encode_i64<W: Write>(writer: &mut W, v: i64) -> Result<(), Error> {
     let mut enc = Vec::new();
 
@@ -611,7 +606,7 @@ pub fn catalog_encode_i64<W: Write>(writer: &mut W, v: i64) -> Result<(), Error>
             break;
         }
         enc.push((128 | (d & 127)) as u8);
-        d = d >> 7;
+        d >>= 7;
     }
     writer.write_all(&enc)?;
 
@@ -623,6 +618,7 @@ pub fn catalog_encode_i64<W: Write>(writer: &mut W, v: i64) -> Result<(), Error>
 /// We currently read maximal 11 bytes, which give a maximum of 70 bits + sign.
 /// this method is compatible with catalog_encode_u64 iff the
 /// value encoded is <= 2^63 (values > 2^63 cannot be represented in an i64)
+#[allow(clippy::neg_multiply)]
 pub fn catalog_decode_i64<R: Read>(reader: &mut R) -> Result<i64, Error> {
 
     let mut v: u64 = 0;
@@ -665,7 +661,7 @@ pub fn catalog_encode_u64<W: Write>(writer: &mut W, v: u64) -> Result<(), Error>
             break;
         }
         enc.push((128 | (d & 127)) as u8);
-        d = d >> 7;
+        d >>= 7;
     }
     writer.write_all(&enc)?;
 

src/backup/catalog_shell.rs

@@ -441,8 +441,7 @@ impl Shell {
         R: 'static,
     {
         let shell: &mut Shell = unsafe { std::mem::transmute(SHELL.unwrap()) };
-        let result = call(&mut *shell).await;
-        result
+        call(&mut *shell).await
     }
 
     pub async fn shell(mut self) -> Result<(), Error> {

src/backup/checksum_writer.rs

@@ -18,7 +18,7 @@ impl <W: Write> ChecksumWriter<W> {
         let hasher = crc32fast::Hasher::new();
         let signer = match config {
             Some(config) => {
-                let tied_signer = Tied::new(config.clone(), |config| {
+                let tied_signer = Tied::new(config, |config| {
                     Box::new(unsafe { (*config).data_signer() })
                 });
                 Some(tied_signer)

src/backup/chunk_store.rs

@@ -44,7 +44,7 @@ fn digest_to_prefix(digest: &[u8]) -> PathBuf {
     buf.push(HEX_CHARS[(digest[0] as usize) &0xf]);
     buf.push(HEX_CHARS[(digest[1] as usize) >> 4]);
     buf.push(HEX_CHARS[(digest[1] as usize) & 0xf]);
-    buf.push('/' as u8);
+    buf.push(b'/');
 
     let path = unsafe { String::from_utf8_unchecked(buf)};
 
@@ -80,7 +80,7 @@ impl ChunkStore {
 
         let default_options = CreateOptions::new();
 
-        match create_path(&base, Some(default_options.clone()), Some(options.clone())) {
+        match create_path(&base, Some(default_options), Some(options.clone())) {
             Err(err) => bail!("unable to create chunk store '{}' at {:?} - {}", name, base, err),
             Ok(res) => if ! res  { nix::unistd::chown(&base, Some(uid), Some(gid))? },
         }
@@ -113,9 +113,8 @@ impl ChunkStore {
     }
 
     fn lockfile_path<P: Into<PathBuf>>(base: P) -> PathBuf {
-        let base: PathBuf = base.into();
+        let mut lockfile_path: PathBuf = base.into();
 
-        let mut lockfile_path = base.clone();
         lockfile_path.push(".lock");
 
         lockfile_path
@@ -227,7 +226,7 @@ impl ChunkStore {
                                 continue;
                             }
 
-                            let bad = bytes.ends_with(".bad".as_bytes());
+                            let bad = bytes.ends_with(b".bad");
                             return Some((Ok(entry), percentage, bad));
                         }
                         Some(Err(err)) => {
@@ -402,7 +401,7 @@ impl ChunkStore {
         file.write_all(raw_data)?;
 
         if let Err(err) = std::fs::rename(&tmp_path, &chunk_path) {
-            if let Err(_) = std::fs::remove_file(&tmp_path)  { /* ignore */ }
+            if std::fs::remove_file(&tmp_path).is_err()  { /* ignore */ }
             bail!(
                 "Atomic rename on store '{}' failed for chunk {} - {}",
                 self.name,

src/backup/chunk_stream.rs

@@ -59,7 +59,7 @@ where
                 }
                 None => {
                     this.scan_pos = 0;
-                    if this.buffer.len() > 0 {
+                    if !this.buffer.is_empty() {
                         return Poll::Ready(Some(Ok(this.buffer.split())));
                     } else {
                         return Poll::Ready(None);
@@ -111,7 +111,7 @@ where
                 }
                 None => {
                     // last chunk can have any size
-                    if this.buffer.len() > 0 {
+                    if !this.buffer.is_empty() {
                         return Poll::Ready(Some(Ok(this.buffer.split())));
                     } else {
                         return Poll::Ready(None);

src/backup/crypt_reader.rs

@@ -36,7 +36,7 @@ impl <R: BufRead> CryptReader<R> {
 impl <R: BufRead> Read for CryptReader<R> {
 
     fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
-        if self.small_read_buf.len() > 0 {
+        if !self.small_read_buf.is_empty() {
             let max = if self.small_read_buf.len() > buf.len() {  buf.len() } else { self.small_read_buf.len() };
             let rest = self.small_read_buf.split_off(max);
             buf[..max].copy_from_slice(&self.small_read_buf);
@@ -50,7 +50,7 @@ impl <R: BufRead> Read for CryptReader<R> {
         if buf.len() <= 2*self.block_size {
             let mut outbuf = [0u8; 1024];
 
-            let count = if data.len() == 0 { // EOF
+            let count = if data.is_empty() { // EOF
                 let written = self.crypter.finalize(&mut outbuf)?;
                 self.finalized = true;
                 written
@@ -72,7 +72,7 @@ impl <R: BufRead> Read for CryptReader<R> {
                 buf[..count].copy_from_slice(&outbuf[..count]);
                 Ok(count)
             }
-        } else if data.len() == 0 { // EOF
+        } else if data.is_empty() { // EOF
             let rest = self.crypter.finalize(buf)?;
             self.finalized = true;
             Ok(rest)

src/backup/data_blob.rs

@@ -408,9 +408,7 @@ impl <'a, 'b> DataChunkBuilder<'a, 'b> {
         chunk_size: usize,
         compress: bool,
     ) -> Result<(DataBlob, [u8; 32]), Error> {
-
-        let mut zero_bytes = Vec::with_capacity(chunk_size);
-        zero_bytes.resize(chunk_size, 0u8);
+        let zero_bytes = vec![0; chunk_size];
         let mut chunk_builder = DataChunkBuilder::new(&zero_bytes).compress(compress);
         if let Some(ref crypt_config) = crypt_config {
             chunk_builder = chunk_builder.crypt_config(crypt_config);

src/backup/datastore.rs

@@ -334,9 +334,7 @@ impl DataStore {
         auth_id: &Authid,
     ) -> Result<(Authid, DirLockGuard), Error> {
         // create intermediate path first:
-        let base_path = self.base_path();
-
-        let mut full_path = base_path.clone();
+        let mut full_path = self.base_path();
         full_path.push(backup_group.backup_type());
         std::fs::create_dir_all(&full_path)?;
 
@@ -392,7 +390,7 @@ impl DataStore {
         fn is_hidden(entry: &walkdir::DirEntry) -> bool {
             entry.file_name()
                 .to_str()
-                .map(|s| s.starts_with("."))
+                .map(|s| s.starts_with('.'))
                 .unwrap_or(false)
         }
         let handle_entry_err = |err: walkdir::Error| {
@@ -478,12 +476,11 @@ impl DataStore {
         let image_list = self.list_images()?;
         let image_count = image_list.len();
 
-        let mut done = 0;
         let mut last_percentage: usize = 0;
 
         let mut strange_paths_count: u64 = 0;
 
-        for img in image_list {
+        for (i, img) in image_list.into_iter().enumerate() {
 
             worker.check_abort()?;
             tools::fail_on_shutdown()?;
@@ -516,15 +513,14 @@ impl DataStore {
                 Err(err) if err.kind() == io::ErrorKind::NotFound => (), // ignore vanished files
                 Err(err) => bail!("can't open index {} - {}", img.to_string_lossy(), err),
             }
-            done += 1;
 
-            let percentage = done*100/image_count;
+            let percentage = (i + 1) * 100 / image_count;
             if percentage > last_percentage {
                 crate::task_log!(
                     worker,
                     "marked {}% ({} of {} index files)",
                     percentage,
-                    done,
+                    i + 1,
                     image_count,
                 );
                 last_percentage = percentage;
@@ -548,7 +544,7 @@ impl DataStore {
     }
 
     pub fn garbage_collection_running(&self) -> bool {
-        if let Ok(_) = self.gc_mutex.try_lock() { false } else { true }
+        !matches!(self.gc_mutex.try_lock(), Ok(_))
     }
 
     pub fn garbage_collection(&self, worker: &dyn TaskState, upid: &UPID) -> Result<(), Error> {

src/backup/dynamic_index.rs

@@ -194,7 +194,7 @@ impl IndexFile for DynamicIndexReader {
         if pos >= self.index.len() {
             None
         } else {
-            Some(unsafe { std::mem::transmute(self.chunk_digest(pos).as_ptr()) })
+            Some(unsafe { &*(self.chunk_digest(pos).as_ptr() as *const [u8; 32]) })
         }
     }
 
@@ -229,7 +229,7 @@ impl IndexFile for DynamicIndexReader {
 
         Some(ChunkReadInfo {
             range: start..end,
-            digest: self.index[pos].digest.clone(),
+            digest: self.index[pos].digest,
         })
     }
 

src/backup/file_formats.rs

@@ -63,11 +63,11 @@ pub struct EncryptedDataBlobHeader {
 ///
 /// Panics on unknown magic numbers.
 pub fn header_size(magic: &[u8; 8]) -> usize {
-    match magic {
-        &UNCOMPRESSED_BLOB_MAGIC_1_0 => std::mem::size_of::<DataBlobHeader>(),
-        &COMPRESSED_BLOB_MAGIC_1_0 => std::mem::size_of::<DataBlobHeader>(),
-        &ENCRYPTED_BLOB_MAGIC_1_0 => std::mem::size_of::<EncryptedDataBlobHeader>(),
-        &ENCR_COMPR_BLOB_MAGIC_1_0 => std::mem::size_of::<EncryptedDataBlobHeader>(),
+    match *magic {
+        UNCOMPRESSED_BLOB_MAGIC_1_0 => std::mem::size_of::<DataBlobHeader>(),
+        COMPRESSED_BLOB_MAGIC_1_0 => std::mem::size_of::<DataBlobHeader>(),
+        ENCRYPTED_BLOB_MAGIC_1_0 => std::mem::size_of::<EncryptedDataBlobHeader>(),
+        ENCR_COMPR_BLOB_MAGIC_1_0 => std::mem::size_of::<EncryptedDataBlobHeader>(),
         _ => panic!("unknown blob magic"),
     }
 }

src/backup/fixed_index.rs

@@ -60,7 +60,7 @@ impl FixedIndexReader {
     pub fn open(path: &Path) -> Result<Self, Error> {
         File::open(path)
             .map_err(Error::from)
-            .and_then(|file| Self::new(file))
+            .and_then(Self::new)
             .map_err(|err| format_err!("Unable to open fixed index {:?} - {}", path, err))
     }
 
@@ -126,7 +126,7 @@ impl FixedIndexReader {
     }
 
     fn unmap(&mut self) -> Result<(), Error> {
-        if self.index == std::ptr::null_mut() {
+        if self.index.is_null() {
             return Ok(());
         }
 
@@ -166,7 +166,7 @@ impl IndexFile for FixedIndexReader {
         if pos >= self.index_length {
             None
         } else {
-            Some(unsafe { std::mem::transmute(self.index.add(pos * 32)) })
+            Some(unsafe { &*(self.index.add(pos * 32) as *const [u8; 32]) })
         }
     }
 
@@ -324,7 +324,7 @@ impl FixedIndexWriter {
     }
 
     fn unmap(&mut self) -> Result<(), Error> {
-        if self.index == std::ptr::null_mut() {
+        if self.index.is_null() {
             return Ok(());
         }
 
@@ -342,7 +342,7 @@ impl FixedIndexWriter {
     }
 
     pub fn close(&mut self) -> Result<[u8; 32], Error> {
-        if self.index == std::ptr::null_mut() {
+        if self.index.is_null() {
             bail!("cannot close already closed index file.");
         }
 
@@ -437,7 +437,7 @@ impl FixedIndexWriter {
             );
         }
 
-        if self.index == std::ptr::null_mut() {
+        if self.index.is_null() {
             bail!("cannot write to closed index file.");
         }
 

src/backup/key_derivation.rs

@@ -336,7 +336,7 @@ pub fn rsa_decrypt_key_config(
     let decrypted = rsa
         .private_decrypt(key, &mut buffer, openssl::rsa::Padding::PKCS1)
         .map_err(|err| format_err!("failed to decrypt KeyConfig using RSA - {}", err))?;
-    decrypt_key(&mut buffer[..decrypted], passphrase)
+    decrypt_key(&buffer[..decrypted], passphrase)
 }
 
 #[test]
@@ -372,9 +372,9 @@ fn encrypt_decrypt_test() -> Result<(), Error> {
         hint: None,
     };
 
-    let encrypted = rsa_encrypt_key_config(public.clone(), &key).expect("encryption failed");
+    let encrypted = rsa_encrypt_key_config(public, &key).expect("encryption failed");
     let (decrypted, created, fingerprint) =
-        rsa_decrypt_key_config(private.clone(), &encrypted, &passphrase)
+        rsa_decrypt_key_config(private, &encrypted, &passphrase)
             .expect("decryption failed");
 
     assert_eq!(key.created, created);

src/backup/manifest.rs

@@ -186,7 +186,7 @@ impl BackupManifest {
             manifest["unprotected"]["key-fingerprint"] = serde_json::to_value(fingerprint)?;
         }
 
-        let manifest = serde_json::to_string_pretty(&manifest).unwrap().into();
+        let manifest = serde_json::to_string_pretty(&manifest).unwrap();
         Ok(manifest)
     }
 

src/backup/prune.rs

@@ -8,7 +8,7 @@ enum PruneMark { Keep, KeepPartial, Remove }
 
 fn mark_selections<F: Fn(&BackupInfo) -> Result<String, Error>> (
     mark: &mut HashMap<PathBuf, PruneMark>,
-    list: &Vec<BackupInfo>,
+    list: &[BackupInfo],
     keep: usize,
     select_id: F,
 ) -> Result<(), Error> {
@@ -26,7 +26,7 @@ fn mark_selections<F: Fn(&BackupInfo) -> Result<String, Error>> (
 
     for info in list {
         let backup_id = info.backup_dir.relative_path();
-        if let Some(_) = mark.get(&backup_id) { continue; }
+        if mark.get(&backup_id).is_some() { continue; }
         let sel_id: String = select_id(&info)?;
 
         if already_included.contains(&sel_id) { continue; }
@@ -45,7 +45,7 @@ fn mark_selections<F: Fn(&BackupInfo) -> Result<String, Error>> (
 
 fn remove_incomplete_snapshots(
     mark: &mut HashMap<PathBuf, PruneMark>,
-    list: &Vec<BackupInfo>,
+    list: &[BackupInfo],
 ) {
 
     let mut keep_unfinished = true;

src/backup/verify.rs

@@ -342,7 +342,7 @@ pub fn verify_backup_dir_with_lock(
     };
 
     if let Some(filter) = filter {
-        if filter(&manifest) == false {
+        if !filter(&manifest) {
             task_log!(
                 worker,
                 "SKIPPED: verify {}:{} (recently verified)",

src/bin/proxmox-backup-client.rs

@@ -898,7 +898,7 @@ async fn create_backup(
         }
     }
 
-    let backup_time = backup_time_opt.unwrap_or_else(|| epoch_i64());
+    let backup_time = backup_time_opt.unwrap_or_else(epoch_i64);
 
     let client = connect(&repo)?;
     record_repository(&repo);
@@ -917,7 +917,7 @@ async fn create_backup(
             let (key, created, fingerprint) = decrypt_key(&key, &key::get_encryption_key_password)?;
             println!("Encryption key fingerprint: {}", fingerprint);
 
-            let crypt_config = CryptConfig::new(key.clone())?;
+            let crypt_config = CryptConfig::new(key)?;
 
             match key::find_master_pubkey()? {
                 Some(ref path) if path.exists() => {
@@ -1464,7 +1464,7 @@ async fn prune_async(mut param: Value) -> Result<Value, Error> {
     if quiet {
         let list: Vec<Value> = data.as_array().unwrap().iter().filter(|item| {
             item["keep"].as_bool() == Some(false)
-        }).map(|v| v.clone()).collect();
+        }).cloned().collect();
         data = list.into();
     }
 

src/bin/proxmox-backup-proxy.rs

@@ -4,7 +4,7 @@ use std::os::unix::io::AsRawFd;
 
 use anyhow::{bail, format_err, Error};
 use futures::*;
-use hyper;
+
 use openssl::ssl::{SslMethod, SslAcceptor, SslFiletype};
 use tokio_stream::wrappers::ReceiverStream;
 
@@ -218,10 +218,8 @@ fn accept_connections(
 
                         match result {
                             Ok(Ok(())) => {
-                                if let Err(_) = sender.send(Ok(stream)).await {
-                                    if debug {
-                                        eprintln!("detect closed connection channel");
-                                    }
+                                if sender.send(Ok(stream)).await.is_err() && debug {
+                                    eprintln!("detect closed connection channel");
                                 }
                             }
                             Ok(Err(err)) => {
@@ -583,16 +581,16 @@ async fn schedule_task_log_rotate() {
         false,
         move |worker| {
             job.start(&worker.upid().to_string())?;
-            worker.log(format!("starting task log rotation"));
+            worker.log("starting task log rotation".to_string());
 
             let result = try_block!({
                 let max_size = 512 * 1024 - 1; // an entry has ~ 100b, so > 5000 entries/file
                 let max_files = 20; // times twenty files gives > 100000 task entries
                 let has_rotated = rotate_task_log_archive(max_size, true, Some(max_files))?;
                 if has_rotated {
-                    worker.log(format!("task log archive was rotated"));
+                    worker.log("task log archive was rotated".to_string());
                 } else {
-                    worker.log(format!("task log archive was not rotated"));
+                    worker.log("task log archive was not rotated".to_string());
                 }
 
                 let max_size = 32 * 1024 * 1024 - 1;
@@ -603,18 +601,18 @@ async fn schedule_task_log_rotate() {
                 if logrotate.rotate(max_size, None, Some(max_files))? {
                     println!("rotated access log, telling daemons to re-open log file");
                     proxmox_backup::tools::runtime::block_on(command_reopen_logfiles())?;
-                    worker.log(format!("API access log was rotated"));
+                    worker.log("API access log was rotated".to_string());
                 } else {
-                    worker.log(format!("API access log was not rotated"));
+                    worker.log("API access log was not rotated".to_string());
                 }
 
                 let mut logrotate = LogRotate::new(buildcfg::API_AUTH_LOG_FN, true)
                         .ok_or_else(|| format_err!("could not get API auth log file names"))?;
 
                 if logrotate.rotate(max_size, None, Some(max_files))? {
-                    worker.log(format!("API authentication log was rotated"));
+                    worker.log("API authentication log was rotated".to_string());
                 } else {
-                    worker.log(format!("API authentication log was not rotated"));
+                    worker.log("API authentication log was not rotated".to_string());
                 }
 
                 Ok(())
@@ -751,7 +749,7 @@ async fn generate_host_stats(save: bool) {
         match datastore::config() {
             Ok((config, _)) => {
                 let datastore_list: Vec<datastore::DataStoreConfig> =
-                    config.convert_to_typed_array("datastore").unwrap_or(Vec::new());
+                    config.convert_to_typed_array("datastore").unwrap_or_default();
 
                 for config in datastore_list {
 

src/bin/proxmox-tape.rs

@@ -601,16 +601,14 @@ fn debug_scan(param: Value) -> Result<(), Error> {
                     Ok(header) => {
                         if header.magic != PROXMOX_BACKUP_CONTENT_HEADER_MAGIC_1_0 {
                             println!("got MediaContentHeader with wrong magic: {:?}", header.magic);
+                        } else if let Some(name) = PROXMOX_BACKUP_CONTENT_NAME.get(&header.content_magic) {
+                            println!("got content header: {}", name);
+                            println!("  uuid:  {}", header.content_uuid());
+                            println!("  ctime: {}", strftime_local("%c", header.ctime)?);
+                            println!("  hsize: {}", HumanByte::from(header.size as usize));
+                            println!("  part:  {}", header.part_number);
                         } else {
-                            if let Some(name) = PROXMOX_BACKUP_CONTENT_NAME.get(&header.content_magic) {
-                                println!("got content header: {}", name);
-                                println!("  uuid:  {}", header.content_uuid());
-                                println!("  ctime: {}", strftime_local("%c", header.ctime)?);
-                                println!("  hsize: {}", HumanByte::from(header.size as usize));
-                                println!("  part:  {}", header.part_number);
-                            } else {
-                                println!("got unknown content header: {:?}", header.content_magic);
-                            }
+                            println!("got unknown content header: {:?}", header.content_magic);
                         }
                     }
                     Err(err) => {

src/bin/proxmox_backup_client/benchmark.rs

@@ -293,7 +293,7 @@ fn test_crypt_speed(
     let speed = (bytes as f64)/start_time.elapsed().as_secs_f64();
     benchmark_result.sha256.speed = Some(speed);
 
-    eprintln!("SHA256 speed: {:.2} MB/s", speed/1_000_000_.0);
+    eprintln!("SHA256 speed: {:.2} MB/s", speed/1_000_000.0);
 
 
     let start_time = std::time::Instant::now();
@@ -308,7 +308,7 @@ fn test_crypt_speed(
     let speed = (bytes as f64)/start_time.elapsed().as_secs_f64();
     benchmark_result.compress.speed = Some(speed);
 
-    eprintln!("Compression speed: {:.2} MB/s", speed/1_000_000_.0);
+    eprintln!("Compression speed: {:.2} MB/s", speed/1_000_000.0);
 
 
     let start_time = std::time::Instant::now();
@@ -328,7 +328,7 @@ fn test_crypt_speed(
     let speed = (bytes as f64)/start_time.elapsed().as_secs_f64();
     benchmark_result.decompress.speed = Some(speed);
 
-    eprintln!("Decompress speed: {:.2} MB/s", speed/1_000_000_.0);
+    eprintln!("Decompress speed: {:.2} MB/s", speed/1_000_000.0);
 
 
     let start_time = std::time::Instant::now();
@@ -343,7 +343,7 @@ fn test_crypt_speed(
     let speed = (bytes as f64)/start_time.elapsed().as_secs_f64();
     benchmark_result.aes256_gcm.speed = Some(speed);
 
-    eprintln!("AES256/GCM speed: {:.2} MB/s", speed/1_000_000_.0);
+    eprintln!("AES256/GCM speed: {:.2} MB/s", speed/1_000_000.0);
 
 
     let start_time = std::time::Instant::now();
@@ -361,7 +361,7 @@ fn test_crypt_speed(
     let speed = (bytes as f64)/start_time.elapsed().as_secs_f64();
     benchmark_result.verify.speed = Some(speed);
 
-    eprintln!("Verify speed: {:.2} MB/s", speed/1_000_000_.0);
+    eprintln!("Verify speed: {:.2} MB/s", speed/1_000_000.0);
 
     Ok(())
 }

src/bin/proxmox_backup_client/mount.rs

@@ -189,12 +189,12 @@ async fn mount_do(param: Value, pipe: Option<Fd>) -> Result<Value, Error> {
     };
 
     let server_archive_name = if archive_name.ends_with(".pxar") {
-        if let None = target {
+        if target.is_none() {
             bail!("use the 'mount' command to mount pxar archives");
         }
         format!("{}.didx", archive_name)
     } else if archive_name.ends_with(".img") {
-        if let Some(_) = target {
+        if target.is_some() {
             bail!("use the 'map' command to map drive images");
         }
         format!("{}.fidx", archive_name)

src/bin/proxmox_tape/changer.rs

@@ -239,7 +239,7 @@ async fn get_status(
         }
         let text = value.as_str().unwrap().to_string();
         if text.is_empty() {
-            return Ok(String::from("--FULL--"));
+            Ok(String::from("--FULL--"))
         } else {
             Ok(text)
         }

src/bin/sg-tape-cmd.rs

@@ -56,7 +56,7 @@ fn get_tape_handle(param: &Value) -> Result<LinuxTapeHandle, Error> {
         let file = unsafe { File::from_raw_fd(fd) };
         check_tape_is_linux_tape_device(&file)?;
         LinuxTapeHandle::new(file)
-    } else if let Some(name) = std::env::var("PROXMOX_TAPE_DRIVE").ok() {
+    } else if let Ok(name) = std::env::var("PROXMOX_TAPE_DRIVE") {
         let (config, _digest) = config::drive::config()?;
         let drive: LinuxTapeDrive = config.lookup("linux", &name)?;
         eprintln!("using device {}", drive.path);
@@ -292,13 +292,11 @@ fn main() -> Result<(), Error> {
         bail!("this program needs to be run with setuid root");
     }
 
-    if !running_uid.is_root() {
-        if running_uid != backup_uid || running_gid != backup_gid {
-            bail!(
-                "Not running as backup user or group (got uid {} gid {})",
-                running_uid, running_gid,
-            );
-        }
+    if !running_uid.is_root() && (running_uid != backup_uid || running_gid != backup_gid) {
+        bail!(
+            "Not running as backup user or group (got uid {} gid {})",
+            running_uid, running_gid,
+        );
     }
 
     let cmd_def = CliCommandMap::new()

src/config/acl.rs

@@ -74,12 +74,14 @@ pub const ROLE_ADMIN: u64 = std::u64::MAX;
 pub const ROLE_NO_ACCESS: u64 = 0;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Audit can view configuration and status information, but not modify it.
 pub const ROLE_AUDIT: u64 = 0
     | PRIV_SYS_AUDIT
     | PRIV_DATASTORE_AUDIT;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Datastore.Admin can do anything on the datastore.
 pub const ROLE_DATASTORE_ADMIN: u64 = 0
     | PRIV_DATASTORE_AUDIT
@@ -90,6 +92,7 @@ pub const ROLE_DATASTORE_ADMIN: u64 = 0
     | PRIV_DATASTORE_PRUNE;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Datastore.Reader can read/verify datastore content and do restore
 pub const ROLE_DATASTORE_READER: u64 = 0
     | PRIV_DATASTORE_AUDIT
@@ -97,27 +100,32 @@ pub const ROLE_DATASTORE_READER: u64 = 0
     | PRIV_DATASTORE_READ;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Datastore.Backup can do backup and restore, but no prune.
 pub const ROLE_DATASTORE_BACKUP: u64 = 0
     | PRIV_DATASTORE_BACKUP;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Datastore.PowerUser can do backup, restore, and prune.
 pub const ROLE_DATASTORE_POWERUSER: u64 = 0
     | PRIV_DATASTORE_PRUNE
     | PRIV_DATASTORE_BACKUP;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Datastore.Audit can audit the datastore.
 pub const ROLE_DATASTORE_AUDIT: u64 = 0
     | PRIV_DATASTORE_AUDIT;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Remote.Audit can audit the remote
 pub const ROLE_REMOTE_AUDIT: u64 = 0
     | PRIV_REMOTE_AUDIT;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Remote.Admin can do anything on the remote.
 pub const ROLE_REMOTE_ADMIN: u64 = 0
     | PRIV_REMOTE_AUDIT
@@ -125,6 +133,7 @@ pub const ROLE_REMOTE_ADMIN: u64 = 0
     | PRIV_REMOTE_READ;
 
 #[rustfmt::skip]
+#[allow(clippy::identity_op)]
 /// Remote.SyncOperator can do read and prune on the remote.
 pub const ROLE_REMOTE_SYNC_OPERATOR: u64 = 0
     | PRIV_REMOTE_AUDIT
@@ -363,6 +372,7 @@ impl AclTreeNode {
     fn extract_group_roles(&self, _user: &Userid, leaf: bool) -> HashMap<String, bool> {
         let mut map = HashMap::new();
 
+        #[allow(clippy::for_kv_map)]
         for (_group, roles) in &self.groups {
             let is_member = false; // fixme: check if user is member of the group
             if !is_member {
@@ -402,7 +412,7 @@ impl AclTreeNode {
     }
 
     fn insert_group_role(&mut self, group: String, role: String, propagate: bool) {
-        let map = self.groups.entry(group).or_insert_with(|| HashMap::new());
+        let map = self.groups.entry(group).or_insert_with(HashMap::new);
         if role == ROLE_NAME_NO_ACCESS {
             map.clear();
             map.insert(role, propagate);
@@ -413,7 +423,7 @@ impl AclTreeNode {
     }
 
     fn insert_user_role(&mut self, auth_id: Authid, role: String, propagate: bool) {
-        let map = self.users.entry(auth_id).or_insert_with(|| HashMap::new());
+        let map = self.users.entry(auth_id).or_insert_with(HashMap::new);
         if role == ROLE_NAME_NO_ACCESS {
             map.clear();
             map.insert(role, propagate);
@@ -435,7 +445,7 @@ impl AclTree {
     /// Iterates over the tree looking for a node matching `path`.
     pub fn find_node(&mut self, path: &str) -> Option<&mut AclTreeNode> {
         let path = split_acl_path(path);
-        return self.get_node(&path);
+        self.get_node(&path)
     }
 
     fn get_node(&mut self, path: &[&str]) -> Option<&mut AclTreeNode> {
@@ -455,7 +465,7 @@ impl AclTree {
             node = node
                 .children
                 .entry(String::from(*comp))
-                .or_insert_with(|| AclTreeNode::new());
+                .or_insert_with(AclTreeNode::new);
         }
         node
     }
@@ -521,12 +531,12 @@ impl AclTree {
                 if *propagate {
                     role_ug_map1
                         .entry(role)
-                        .or_insert_with(|| BTreeSet::new())
+                        .or_insert_with(BTreeSet::new)
                         .insert(auth_id);
                 } else {
                     role_ug_map0
                         .entry(role)
-                        .or_insert_with(|| BTreeSet::new())
+                        .or_insert_with(BTreeSet::new)
                         .insert(auth_id);
                 }
             }
@@ -538,12 +548,12 @@ impl AclTree {
                 if *propagate {
                     role_ug_map1
                         .entry(role)
-                        .or_insert_with(|| BTreeSet::new())
+                        .or_insert_with(BTreeSet::new)
                         .insert(group);
                 } else {
                     role_ug_map0
                         .entry(role)
-                        .or_insert_with(|| BTreeSet::new())
+                        .or_insert_with(BTreeSet::new)
                         .insert(group);
                 }
             }
@@ -563,7 +573,7 @@ impl AclTree {
                 });
                 result_map
                     .entry(item_list)
-                    .or_insert_with(|| BTreeSet::new())
+                    .or_insert_with(BTreeSet::new)
                     .insert(item.to_string());
             }
             result_map
@@ -651,8 +661,7 @@ impl AclTree {
                 if !ROLE_NAMES.contains_key(role) {
                     bail!("unknown role '{}'", role);
                 }
-                if user_or_group.starts_with('@') {
-                    let group = &user_or_group[1..];
+                if let Some(group) = user_or_group.strip_prefix('@') {
                     node.insert_group_role(group.to_string(), role.to_string(), propagate);
                 } else {
                     node.insert_user_role(user_or_group.parse()?, role.to_string(), propagate);

src/config/cached_user_info.rs

@@ -98,7 +98,7 @@ impl CachedUserInfo {
             }
         }
 
-        return true;
+        true
     }
 
     pub fn check_privs(

src/config/datastore.rs

@@ -135,8 +135,8 @@ pub const DATASTORE_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.datastore.lck";
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(DATASTORE_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(DATASTORE_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let data = CONFIG.parse(DATASTORE_CFG_FILENAME, &content)?;

src/config/drive.rs

@@ -68,8 +68,8 @@ pub fn lock() -> Result<std::fs::File, Error> {
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(DRIVE_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(DRIVE_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let data = CONFIG.parse(DRIVE_CFG_FILENAME, &content)?;

src/config/media_pool.rs

@@ -43,8 +43,8 @@ fn init() -> SectionConfig {
     config
 }
 
-pub const MEDIA_POOL_CFG_FILENAME: &'static str = "/etc/proxmox-backup/media-pool.cfg";
-pub const MEDIA_POOL_CFG_LOCKFILE: &'static str = "/etc/proxmox-backup/.media-pool.lck";
+pub const MEDIA_POOL_CFG_FILENAME: &str = "/etc/proxmox-backup/media-pool.cfg";
+pub const MEDIA_POOL_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.media-pool.lck";
 
 pub fn lock() -> Result<std::fs::File, Error> {
     open_file_locked(MEDIA_POOL_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)
@@ -52,8 +52,8 @@ pub fn lock() -> Result<std::fs::File, Error> {
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(MEDIA_POOL_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(MEDIA_POOL_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let data = CONFIG.parse(MEDIA_POOL_CFG_FILENAME, &content)?;

src/config/network.rs

@@ -386,9 +386,9 @@ impl NetworkConfig {
     pub fn check_mtu(&self, parent_name: &str, child_name: &str) -> Result<(), Error> {
 
         let parent = self.interfaces.get(parent_name)
-            .ok_or(format_err!("check_mtu - missing parent interface '{}'", parent_name))?;
+            .ok_or_else(|| format_err!("check_mtu - missing parent interface '{}'", parent_name))?;
         let child = self.interfaces.get(child_name)
-            .ok_or(format_err!("check_mtu - missing child interface '{}'", child_name))?;
+            .ok_or_else(|| format_err!("check_mtu - missing child interface '{}'", child_name))?;
 
         let child_mtu = match child.mtu {
             Some(mtu) => mtu,
@@ -515,7 +515,7 @@ pub fn config() -> Result<(NetworkConfig, [u8;32]), Error> {
         Some(content) => content,
         None => {
             let content = proxmox::tools::fs::file_get_optional_contents(NETWORK_INTERFACES_FILENAME)?;
-            content.unwrap_or(Vec::new())
+            content.unwrap_or_default()
         }
     };
 
@@ -577,8 +577,8 @@ pub fn complete_port_list(arg: &str, _param: &HashMap<String, String>) -> Vec<St
         Err(_) => return vec![],
     };
 
-    let arg = arg.clone().trim();
-    let prefix = if let Some(idx) = arg.rfind(",") { &arg[..idx+1] } else { "" };
+    let arg = arg.trim();
+    let prefix = if let Some(idx) = arg.rfind(',') { &arg[..idx+1] } else { "" };
     ports.iter().map(|port| format!("{}{}", prefix, port)).collect()
 }
 

src/config/network/helper.rs

@@ -51,6 +51,7 @@ pub static IPV4_REVERSE_MASK: &[&str] = &[
 lazy_static! {
     pub static ref IPV4_MASK_HASH_LOCALNET: HashMap<&'static str, u8> = {
         let mut map = HashMap::new();
+        #[allow(clippy::needless_range_loop)]
         for i in 8..32 {
             map.insert(IPV4_REVERSE_MASK[i], i as u8);
         }
@@ -61,22 +62,23 @@ lazy_static! {
 pub fn parse_cidr(cidr: &str) -> Result<(String, u8, bool), Error> {
     let (address, mask, is_v6) = parse_address_or_cidr(cidr)?;
     if let Some(mask) = mask {
-        return Ok((address, mask, is_v6));
+        Ok((address, mask, is_v6))
     } else {
         bail!("missing netmask in '{}'", cidr);
     }
 }
 
 pub fn check_netmask(mask: u8, is_v6: bool) -> Result<(), Error> {
-    if is_v6 {
-        if !(mask >= 1 && mask <= 128) {
-            bail!("IPv6 mask '{}' is out of range (1..128).", mask);
-        }
+    let (ver, min, max) = if is_v6 {
+        ("IPv6", 1, 128)
     } else {
-        if !(mask > 0 && mask <= 32) {
-            bail!("IPv4 mask '{}' is out of range (1..32).", mask);
-        }
+        ("IPv4", 1, 32)
+    };
+
+    if !(mask >= min && mask <= max) {
+        bail!("{} mask '{}' is out of range ({}..{}).", ver, mask, min, max);
     }
+
     Ok(())
 }
 
@@ -97,18 +99,18 @@ pub fn parse_address_or_cidr(cidr: &str) -> Result<(String, Option<u8>, bool), E
         if let Some(mask) = caps.get(2) {
             let mask = u8::from_str_radix(mask.as_str(), 10)?;
             check_netmask(mask, false)?;
-            return Ok((address.to_string(), Some(mask), false));
+            Ok((address.to_string(), Some(mask), false))
         } else {
-            return Ok((address.to_string(), None, false));
+            Ok((address.to_string(), None, false))
         }
     } else if let Some(caps) = CIDR_V6_REGEX.captures(&cidr) {
         let address = &caps[1];
         if let Some(mask) = caps.get(2) {
             let mask = u8::from_str_radix(mask.as_str(), 10)?;
             check_netmask(mask, true)?;
-            return Ok((address.to_string(), Some(mask), true));
+            Ok((address.to_string(), Some(mask), true))
         } else {
-            return Ok((address.to_string(), None, true));
+            Ok((address.to_string(), None, true))
         }
     } else {
         bail!("invalid address/mask '{}'", cidr);

src/config/network/lexer.rs

@@ -74,9 +74,9 @@ impl <R: BufRead> Lexer<R> {
     }
 
     fn split_line(line: &str) -> VecDeque<(Token, String)> {
-        if line.starts_with("#") {
+        if let Some(comment) = line.strip_prefix('#') {
             let mut res = VecDeque::new();
-            res.push_back((Token::Comment, line[1..].trim().to_string()));
+            res.push_back((Token::Comment, comment.trim().to_string()));
             return res;
         }
         let mut list: VecDeque<(Token, String)> = line.split_ascii_whitespace().map(|text| {
@@ -114,14 +114,14 @@ impl <R: BufRead> Iterator for Lexer<R> {
             Some(ref mut  cur_line) => {
                 if cur_line.is_empty() {
                     self.cur_line = None;
-                    return Some(Ok((Token::Newline, String::from("\n"))));
+                    Some(Ok((Token::Newline, String::from("\n"))))
                 } else {
                     let (token, text) = cur_line.pop_front().unwrap();
-                    return Some(Ok((token, text)));
+                    Some(Ok((token, text)))
                 }
             }
             None => {
-                return None;
+                None
             }
         }
     }

src/config/network/parser.rs

@@ -29,7 +29,7 @@ impl <R: BufRead> NetworkParser<R> {
                 bail!("input error - {}", err);
             }
             Some(Ok((token, _))) => {
-                return Ok(*token);
+                Ok(*token)
             }
             None => {
                 bail!("got unexpected end of stream (inside peek)");
@@ -44,7 +44,7 @@ impl <R: BufRead> NetworkParser<R> {
             }
             Some(Ok((token, text))) => {
                 if token == Token::Newline { self.line_nr += 1; }
-                return Ok((token, text));
+                Ok((token, text))
             }
             None => {
                 bail!("got unexpected end of stream (inside peek)");
@@ -215,12 +215,12 @@ impl <R: BufRead> NetworkParser<R> {
                 Token::Comment => {
                     let comment = self.eat(Token::Comment)?;
                     if !address_family_v4 && address_family_v6 {
-                        let mut comments = interface.comments6.take().unwrap_or(String::new());
+                        let mut comments = interface.comments6.take().unwrap_or_default();
                         if !comments.is_empty() { comments.push('\n'); }
                         comments.push_str(&comment);
                         interface.comments6 = Some(comments);
                     } else {
-                        let mut comments = interface.comments.take().unwrap_or(String::new());
+                        let mut comments = interface.comments.take().unwrap_or_default();
                         if !comments.is_empty() { comments.push('\n'); }
                         comments.push_str(&comment);
                         interface.comments = Some(comments);

src/config/remote.rs

@@ -92,8 +92,8 @@ pub const REMOTE_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.remote.lck";
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(REMOTE_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(REMOTE_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let data = CONFIG.parse(REMOTE_CFG_FILENAME, &content)?;

src/config/sync.rs

@@ -79,7 +79,7 @@ impl From<&SyncJobStatus> for SyncJobConfig {
             owner: job_status.owner.clone(),
             remote: job_status.remote.clone(),
             remote_store: job_status.remote_store.clone(),
-            remove_vanished: job_status.remove_vanished.clone(),
+            remove_vanished: job_status.remove_vanished,
             comment: job_status.comment.clone(),
             schedule: job_status.schedule.clone(),
         }
@@ -183,8 +183,8 @@ pub const SYNC_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.sync.lck";
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(SYNC_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(SYNC_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let data = CONFIG.parse(SYNC_CFG_FILENAME, &content)?;

src/config/tape_encryption_keys.rs

@@ -53,7 +53,7 @@ pub struct EncryptionKeyInfo {
 }
 
 pub fn compute_tape_key_fingerprint(key: &[u8; 32]) -> Result<Fingerprint, Error> {
-    let crypt_config = CryptConfig::new(key.clone())?;
+    let crypt_config = CryptConfig::new(*key)?;
     Ok(crypt_config.fingerprint())
 }
 
@@ -193,7 +193,7 @@ pub fn insert_key(key: [u8;32], key_config: KeyConfig, force: bool) -> Result<()
     };
 
     if !force {
-        if let Some(_) = config_map.get(&fingerprint) {
+        if config_map.get(&fingerprint).is_some() {
             bail!("encryption key '{}' already exists.", fingerprint);
         }
     }

src/config/tfa.rs

@@ -1380,14 +1380,14 @@ impl std::str::FromStr for TfaResponse {
     type Err = Error;
 
     fn from_str(s: &str) -> Result<Self, Error> {
-        Ok(if s.starts_with("totp:") {
-            TfaResponse::Totp(s[5..].to_string())
-        } else if s.starts_with("u2f:") {
-            TfaResponse::U2f(serde_json::from_str(&s[4..])?)
-        } else if s.starts_with("webauthn:") {
-            TfaResponse::Webauthn(serde_json::from_str(&s[9..])?)
-        } else if s.starts_with("recovery:") {
-            TfaResponse::Recovery(s[9..].to_string())
+        Ok(if let Some(totp) = s.strip_prefix("totp:") {
+            TfaResponse::Totp(totp.to_string())
+        } else if let Some(u2f) = s.strip_prefix("u2f:") {
+            TfaResponse::U2f(serde_json::from_str(u2f)?)
+        } else if let Some(webauthn) = s.strip_prefix("webauthn:") {
+            TfaResponse::Webauthn(serde_json::from_str(webauthn)?)
+        } else if let Some(recovery) = s.strip_prefix("recovery:") {
+            TfaResponse::Recovery(recovery.to_string())
         } else {
             bail!("invalid tfa response");
         })

src/config/user.rs

@@ -157,8 +157,8 @@ pub const USER_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.user.lck";
 
 pub fn config() -> Result<(SectionConfigData, [u8;32]), Error> {
 
-    let content = proxmox::tools::fs::file_read_optional_string(USER_CFG_FILENAME)?;
-    let content = content.unwrap_or(String::from(""));
+    let content = proxmox::tools::fs::file_read_optional_string(USER_CFG_FILENAME)?
+        .unwrap_or_else(|| "".to_string());
 
     let digest = openssl::sha::sha256(content.as_bytes());
     let mut data = CONFIG.parse(USER_CFG_FILENAME, &content)?;

src/pxar/create.rs

@@ -40,8 +40,7 @@ fn detect_fs_type(fd: RawFd) -> Result<i64, Error> {
 pub fn is_virtual_file_system(magic: i64) -> bool {
     use proxmox::sys::linux::magic::*;
 
-    match magic {
-        BINFMTFS_MAGIC |
+    matches!(magic, BINFMTFS_MAGIC |
         CGROUP2_SUPER_MAGIC |
         CGROUP_SUPER_MAGIC |
         CONFIGFS_MAGIC |
@@ -58,9 +57,7 @@ pub fn is_virtual_file_system(magic: i64) -> bool {
         SECURITYFS_MAGIC |
         SELINUX_MAGIC |
         SMACK_MAGIC |
-        SYSFS_MAGIC => true,
-        _ => false
-    }
+        SYSFS_MAGIC)
 }
 
 #[derive(Debug)]

src/pxar/extract.rs

@@ -228,7 +228,7 @@ impl Extractor {
             allow_existing_dirs,
             feature_flags,
             current_path: Arc::new(Mutex::new(OsString::new())),
-            on_error: Box::new(|err| Err(err)),
+            on_error: Box::new(Err),
         }
     }
 

src/pxar/fuse.rs

@@ -480,11 +480,11 @@ impl SessionImpl {
         Ok(())
     }
 
-    async fn lookup<'a>(
-        &'a self,
+    async fn lookup(
+        &'_ self,
         parent: u64,
         file_name: &OsStr,
-    ) -> Result<(EntryParam, LookupRef<'a>), Error> {
+    ) -> Result<(EntryParam, LookupRef<'_>), Error> {
         let dir = self.open_dir(parent).await?;
 
         let entry = match { dir }.lookup(file_name).await? {
@@ -519,10 +519,10 @@ impl SessionImpl {
         to_stat(inode, &entry)
     }
 
-    async fn readdirplus<'a>(
-        &'a self,
+    async fn readdirplus(
+        &'_ self,
         request: &mut requests::ReaddirPlus,
-    ) -> Result<Vec<LookupRef<'a>>, Error> {
+    ) -> Result<Vec<LookupRef<'_>>, Error> {
         let mut lookups = Vec::new();
         let offset = usize::try_from(request.offset)
             .map_err(|_| io_format_err!("directory offset out of range"))?;

src/pxar/metadata.rs

@@ -345,10 +345,7 @@ fn apply_quota_project_id(flags: Flags, fd: RawFd, metadata: &Metadata) -> Resul
 }
 
 pub(crate) fn errno_is_unsupported(errno: Errno) -> bool {
-    match errno {
-        Errno::ENOTTY | Errno::ENOSYS | Errno::EBADF | Errno::EOPNOTSUPP | Errno::EINVAL => true,
-        _ => false,
-    }
+    matches!(errno, Errno::ENOTTY | Errno::ENOSYS | Errno::EBADF | Errno::EOPNOTSUPP | Errno::EINVAL)
 }
 
 fn apply_chattr(fd: RawFd, chattr: libc::c_long, mask: libc::c_long) -> Result<(), Error> {

src/rrd/rrd.rs

@@ -128,25 +128,20 @@ impl RRA {
         // derive counter value
         if self.flags.intersects(RRAFlags::DST_DERIVE | RRAFlags::DST_COUNTER) {
             let time_diff = time - self.last_update;
+            let is_counter = self.flags.contains(RRAFlags::DST_COUNTER);
+
             let diff = if self.counter_value.is_nan() {
                 0.0
+            } else if is_counter && value < 0.0 {
+                eprintln!("rrdb update failed - got negative value for counter");
+                return;
+            } else if is_counter && value < self.counter_value {
+                // Note: We do not try automatic overflow corrections
+                self.counter_value = value;
+                eprintln!("rrdb update failed - conter overflow/reset detected");
+                return;
             } else {
-                if self.flags.contains(RRAFlags::DST_COUNTER) { // check for overflow
-                    if value < 0.0 {
-                        eprintln!("rrdb update failed - got negative value for counter");
-                        return;
-                    }
-                    // Note: We do not try automatic overflow corrections
-                    if value < self.counter_value { // overflow or counter reset
-                        self.counter_value = value;
-                        eprintln!("rrdb update failed - conter overflow/reset detected");
-                        return;
-                    } else {
-                        value - self.counter_value
-                    }
-                } else {
-                    value - self.counter_value
-                }
+                value - self.counter_value
             };
             self.counter_value = value;
             value = diff/time_diff;

src/server/command_socket.rs

@@ -127,13 +127,13 @@ pub async fn send_command<P>(
                 if rx.read_line(&mut data).await? == 0 {
                     bail!("no response");
                 }
-                if data.starts_with("OK: ") {
-                    match data[4..].parse::<Value>() {
+                if let Some(res) = data.strip_prefix("OK: ") {
+                    match res.parse::<Value>() {
                         Ok(v) => Ok(v),
                         Err(err) => bail!("unable to parse json response - {}", err),
                     }
-                } else if data.starts_with("ERROR: ") {
-                    bail!("{}", &data[7..]);
+                } else if let Some(err) = data.strip_prefix("ERROR: ") {
+                    bail!("{}", err);
                 } else {
                     bail!("unable to parse response: {}", data);
                 }

src/server/config.rs

@@ -57,9 +57,9 @@ impl ApiConfig {
             prefix.push_str(components[0]);
             if let Some(subdir) = self.aliases.get(&prefix) {
                 filename.push(subdir);
-                for i in 1..comp_len { filename.push(components[i]) }
+                components.iter().skip(1).for_each(|comp| filename.push(comp));
             } else {
-                for i in 0..comp_len { filename.push(components[i]) }
+                components.iter().for_each(|comp| filename.push(comp));
             }
         }
         filename

src/server/email_notifications.rs

@@ -376,7 +376,7 @@ fn get_server_url() -> (String, usize) {
 }
 
 pub fn send_updates_available(
-    updates: &Vec<&APTUpdateInfo>,
+    updates: &[&APTUpdateInfo],
 ) -> Result<(), Error> {
     // update mails always go to the root@pam configured email..
     if let Some(email) = lookup_user_email(Userid::root_userid()) {
@@ -403,7 +403,7 @@ fn lookup_user_email(userid: &Userid) -> Option<String> {
 
     if let Ok(user_config) = user::cached_config() {
         if let Ok(user) = user_config.lookup::<User>("user", userid.as_str()) {
-            return user.email.clone();
+            return user.email;
         }
     }
 
@@ -434,7 +434,7 @@ pub fn lookup_datastore_notify_settings(
         None => lookup_user_email(Userid::root_userid()),
     };
 
-    let notify_str = config.notify.unwrap_or(String::new());
+    let notify_str = config.notify.unwrap_or_default();
 
     if let Ok(value) = parse_property_string(&notify_str, &DatastoreNotify::API_SCHEMA) {
         if let Ok(notify) = serde_json::from_value(value) {
@@ -456,7 +456,7 @@ fn handlebars_humam_bytes_helper(
 ) -> HelperResult {
     let param = h.param(0).map(|v| v.value().as_u64())
         .flatten()
-        .ok_or(RenderError::new("human-bytes: param not found"))?;
+        .ok_or_else(|| RenderError::new("human-bytes: param not found"))?;
 
     out.write(&HumanByte::from(param).to_string())?;
 
@@ -472,10 +472,10 @@ fn handlebars_relative_percentage_helper(
 ) -> HelperResult {
     let param0 = h.param(0).map(|v| v.value().as_f64())
         .flatten()
-        .ok_or(RenderError::new("relative-percentage: param0 not found"))?;
+        .ok_or_else(|| RenderError::new("relative-percentage: param0 not found"))?;
     let param1 = h.param(1).map(|v| v.value().as_f64())
         .flatten()
-        .ok_or(RenderError::new("relative-percentage: param1 not found"))?;
+        .ok_or_else(|| RenderError::new("relative-percentage: param1 not found"))?;
 
     if param1 == 0.0 {
         out.write("-")?;

src/server/environment.rs

@@ -48,6 +48,6 @@ impl RpcEnvironment for RestEnvironment {
     }
 
     fn get_client_ip(&self) -> Option<std::net::SocketAddr> {
-        self.client_ip.clone()
+        self.client_ip
     }
 }

src/server/gc_job.rs

@@ -39,13 +39,12 @@ pub fn do_garbage_collection_job(
 
             let status = worker.create_state(&result);
 
-            match job.finish(status) {
-                Err(err) => eprintln!(
+            if let Err(err) = job.finish(status) {
+                eprintln!(
                     "could not finish job state for {}: {}",
                     job.jobtype().to_string(),
                     err
-                ),
-                Ok(_) => (),
+                );
             }
 
             if let Some(email) = email {

src/server/h2service.rs

@@ -97,7 +97,7 @@ impl <E: RpcEnvironment + Clone> tower_service::Service<Request<Body>> for H2Ser
         let method = req.method().clone();
         let worker = self.worker.clone();
 
-        std::pin::Pin::from(self.handle_request(req))
+        self.handle_request(req)
             .map(move |result| match result {
                 Ok(res) => {
                     Self::log_response(worker, method, &path, &res);

src/server/jobstate.rs

@@ -207,11 +207,8 @@ impl Job {
     /// Start the job and update the statefile accordingly
     /// Fails if the job was already started
     pub fn start(&mut self, upid: &str) -> Result<(), Error> {
-        match self.state {
-            JobState::Started { .. } => {
-                bail!("cannot start job that is started!");
-            }
-            _ => {}
+        if let JobState::Started { .. } = self.state {
+            bail!("cannot start job that is started!");
         }
 
         self.state = JobState::Started {

src/server/report.rs

@@ -39,7 +39,7 @@ fn function_calls() -> Vec<(&'static str, fn() -> String)> {
             };
 
             let mut list = Vec::new();
-            for (store, _) in &config.sections {
+            for store in config.sections.keys() {
                 list.push(store.as_str());
             }
             list.join(", ")

src/server/rest.rs

@@ -147,7 +147,7 @@ fn log_response(
         let now = proxmox::tools::time::epoch_i64();
         // time format which apache/nginx use (by default), copied from pve-http-server
         let datetime = proxmox::tools::time::strftime_local("%d/%m/%Y:%H:%M:%S %z", now)
-            .unwrap_or("-".into());
+            .unwrap_or_else(|_| "-".to_string());
 
         logfile
             .lock()
@@ -161,7 +161,7 @@ fn log_response(
                 path,
                 status.as_str(),
                 resp.body().size_hint().lower(),
-                user_agent.unwrap_or("-".into()),
+                user_agent.unwrap_or_else(|| "-".to_string()),
             ));
     }
 }
@@ -517,7 +517,7 @@ async fn chuncked_static_file_download(filename: PathBuf) -> Result<Response<Bod
         .map_err(|err| http_err!(BAD_REQUEST, "File open failed: {}", err))?;
 
     let payload = tokio_util::codec::FramedRead::new(file, tokio_util::codec::BytesCodec::new())
-        .map_ok(|bytes| hyper::body::Bytes::from(bytes.freeze()));
+        .map_ok(|bytes| bytes.freeze());
     let body = Body::wrap_stream(payload);
 
     // fixme: set other headers ?

src/server/ticket.rs

@@ -68,8 +68,8 @@ impl std::str::FromStr for ApiTicket {
     type Err = Error;
 
     fn from_str(s: &str) -> Result<Self, Error> {
-        if s.starts_with("!tfa!") {
-            Ok(ApiTicket::Partial(serde_json::from_str(&s[5..])?))
+        if let Some(tfa_ticket) = s.strip_prefix("!tfa!") {
+            Ok(ApiTicket::Partial(serde_json::from_str(tfa_ticket)?))
         } else {
             Ok(ApiTicket::Full(s.parse()?))
         }

src/server/verify_job.rs

@@ -23,7 +23,7 @@ pub fn do_verification_job(
 
     let datastore = DataStore::lookup_datastore(&verification_job.store)?;
 
-    let outdated_after = verification_job.outdated_after.clone();
+    let outdated_after = verification_job.outdated_after;
     let ignore_verified_snapshots = verification_job.ignore_verified.unwrap_or(true);
 
     let filter = move |manifest: &BackupManifest| {
@@ -33,7 +33,7 @@ pub fn do_verification_job(
 
         let raw_verify_state = manifest.unprotected["verify_state"].clone();
         match serde_json::from_value::<SnapshotVerifyState>(raw_verify_state) {
-            Err(_) => return true, // no last verification, always include
+            Err(_) => true, // no last verification, always include
             Ok(last_verify) => {
                 match outdated_after {
                     None => false, // never re-verify if ignored and no max age
@@ -83,13 +83,12 @@ pub fn do_verification_job(
 
             let status = worker.create_state(&job_result);
 
-            match job.finish(status) {
-                Err(err) => eprintln!(
+            if let Err(err) = job.finish(status) {
+                eprintln!(
                     "could not finish job state for {}: {}",
                     job.jobtype().to_string(),
                     err
-                ),
-                Ok(_) => (),
+                );
             }
 
             if let Some(email) = email {

src/server/worker_task.rs

@@ -48,7 +48,7 @@ pub async fn worker_is_active(upid: &UPID) -> Result<bool, Error> {
         return Ok(WORKER_TASK_LIST.lock().unwrap().contains_key(&upid.task_id));
     }
 
-    if !procfs::check_process_running_pstart(upid.pid, upid.pstart).is_some() {
+    if procfs::check_process_running_pstart(upid.pid, upid.pstart).is_none() {
         return Ok(false);
     }
 
@@ -191,7 +191,7 @@ pub fn upid_read_status(upid: &UPID) -> Result<TaskState, Error> {
     file.read_to_end(&mut data)?;
 
     // task logs should end with newline, we do not want it here
-    if data.len() > 0 && data[data.len()-1] == b'\n' {
+    if !data.is_empty() && data[data.len()-1] == b'\n' {
         data.pop();
     }
 
@@ -267,11 +267,11 @@ impl TaskState {
             Ok(TaskState::Unknown { endtime })
         } else if s == "OK" {
             Ok(TaskState::OK { endtime })
-        } else if s.starts_with("WARNINGS: ") {
-            let count: u64 = s[10..].parse()?;
+        } else if let Some(warnings) = s.strip_prefix("WARNINGS: ") {
+            let count: u64 = warnings.parse()?;
             Ok(TaskState::Warning{ count, endtime })
-        } else if s.len() > 0 {
-            let message = if s.starts_with("ERROR: ") { &s[7..] } else { s }.to_string();
+        } else if !s.is_empty() {
+            let message = if let Some(err) = s.strip_prefix("ERROR: ") { err } else { s }.to_string();
             Ok(TaskState::Error{ message, endtime })
         } else {
             bail!("unable to parse Task Status '{}'", s);
@@ -330,7 +330,7 @@ pub fn rotate_task_log_archive(size_threshold: u64, compress: bool, max_files: O
     let _lock = lock_task_list_files(true)?;
 
     let mut logrotate = LogRotate::new(PROXMOX_BACKUP_ARCHIVE_TASK_FN, compress)
-        .ok_or(format_err!("could not get archive file names"))?;
+        .ok_or_else(|| format_err!("could not get archive file names"))?;
 
     logrotate.rotate(size_threshold, None, max_files)
 }
@@ -362,8 +362,7 @@ fn update_active_workers(new_upid: Option<&UPID>) -> Result<(), Error> {
             if !worker_is_active_local(&info.upid) {
                 // println!("Detected stopped task '{}'", &info.upid_str);
                 let now = proxmox::tools::time::epoch_i64();
-                let status = upid_read_status(&info.upid)
-                    .unwrap_or_else(|_| TaskState::Unknown { endtime: now });
+                let status = upid_read_status(&info.upid).unwrap_or(TaskState::Unknown { endtime: now });
                 finish_list.push(TaskListInfo {
                     upid: info.upid,
                     upid_str: info.upid_str,

src/tape/changer/mod.rs

@@ -187,11 +187,9 @@ pub trait MediaChange {
                 if let ElementStatus::Empty = element_status {
                     to = Some(i as u64 + 1);
                 }
-            } else {
-                if let ElementStatus::VolumeTag(ref tag) = element_status {
-                    if tag == label_text {
-                        from = Some(i as u64 + 1);
-                    }
+            } else if let ElementStatus::VolumeTag(ref tag) = element_status {
+                if tag == label_text {
+                    from = Some(i as u64 + 1);
                 }
             }
         }

src/tape/changer/parse_mtx_status.rs

@@ -58,13 +58,12 @@ fn parse_drive_status(i: &str) -> IResult<&str, DriveStatus> {
 
     let mut loaded_slot = None;
 
-    if i.starts_with("Empty") {
-        return Ok((&i[5..], DriveStatus { loaded_slot, status: ElementStatus::Empty }));
+    if let Some(empty) = i.strip_suffix("Empty") {
+        return Ok((empty, DriveStatus { loaded_slot, status: ElementStatus::Empty }));
     }
     let (mut i, _) = tag("Full (")(i)?;
 
-    if i.starts_with("Storage Element ") {
-        let n = &i[16..];
+    if let Some(n) = i.strip_prefix("Storage Element ") {
         let (n, id) = parse_u64(n)?;
         loaded_slot = Some(id);
         let (n, _) = tag(" Loaded")(n)?;
@@ -76,8 +75,7 @@ fn parse_drive_status(i: &str) -> IResult<&str, DriveStatus> {
 
     let (i, _) = tag(")")(i)?;
 
-    if i.starts_with(":VolumeTag = ") {
-        let i = &i[13..];
+    if let Some(i) = i.strip_prefix(":VolumeTag = ") {
         let (i, tag) = take_while(|c| !(c == ' ' || c == ':' || c == '\n'))(i)?;
         let (i, _) = take_while(|c| c != '\n')(i)?; // skip to eol
         return Ok((i, DriveStatus { loaded_slot, status: ElementStatus::VolumeTag(tag.to_string()) }));
@@ -89,14 +87,11 @@ fn parse_drive_status(i: &str) -> IResult<&str, DriveStatus> {
 }
 
 fn parse_slot_status(i: &str) -> IResult<&str, ElementStatus> {
-    if i.starts_with("Empty") {
-        return Ok((&i[5..],  ElementStatus::Empty));
+    if let Some(empty) = i.strip_prefix("Empty") {
+        return Ok((empty,  ElementStatus::Empty));
     }
-    if i.starts_with("Full ") {
-        let mut n = &i[5..];
-
-        if n.starts_with(":VolumeTag=") {
-            n = &n[11..];
+    if let Some(n) = i.strip_prefix("Full ") {
+        if let Some(n) = n.strip_prefix(":VolumeTag=") {
             let (n, tag) = take_while(|c| !(c == ' ' || c == ':' || c == '\n'))(n)?;
             let (n, _) = take_while(|c| c != '\n')(n)?; // skip to eol
             return Ok((n, ElementStatus::VolumeTag(tag.to_string())));

src/tape/chunk_archive.rs

@@ -62,15 +62,11 @@ impl <'a> ChunkArchiveWriter<'a> {
     }
 
     fn write_all(&mut self, data: &[u8]) -> Result<bool, std::io::Error> {
-        let result = match self.writer {
-            Some(ref mut writer) => {
-                let leom = writer.write_all(data)?;
-                Ok(leom)
-            }
+        match self.writer {
+            Some(ref mut writer) => writer.write_all(data),
             None => proxmox::io_bail!(
                 "detected write after archive finished - internal error"),
-        };
-        result
+        }
     }
 
     /// Write chunk into archive.

src/tape/drive/encryption.rs

@@ -24,10 +24,7 @@ pub fn has_encryption<F: AsRawFd>(
         Ok(data) => data,
         Err(_) => return false,
     };
-    match decode_spin_data_encryption_caps(&data) {
-        Ok(_) => true,
-        Err(_) => false,
-    }
+    decode_spin_data_encryption_caps(&data).is_ok()
 }
 
 /// Set or clear encryption key

src/tape/drive/linux_list_drives.rs

@@ -85,12 +85,12 @@ pub fn linux_tape_changer_list() -> Vec<TapeDeviceInfo> {
         let vendor = device.property_value("ID_VENDOR")
             .map(std::ffi::OsString::from)
             .and_then(|s| if let Ok(s) = s.into_string() { Some(s) } else { None })
-            .unwrap_or(String::from("unknown"));
+            .unwrap_or_else(|| String::from("unknown"));
 
         let model = device.property_value("ID_MODEL")
             .map(std::ffi::OsString::from)
             .and_then(|s| if let Ok(s) = s.into_string() { Some(s) } else { None })
-            .unwrap_or(String::from("unknown"));
+            .unwrap_or_else(|| String::from("unknown"));
 
         let dev_path = format!("/dev/tape/by-id/scsi-{}", serial);
 
@@ -166,12 +166,12 @@ pub fn linux_tape_device_list() -> Vec<TapeDeviceInfo> {
         let vendor = device.property_value("ID_VENDOR")
             .map(std::ffi::OsString::from)
             .and_then(|s| if let Ok(s) = s.into_string() { Some(s) } else { None })
-            .unwrap_or(String::from("unknown"));
+            .unwrap_or_else(|| String::from("unknown"));
 
         let model = device.property_value("ID_MODEL")
             .map(std::ffi::OsString::from)
             .and_then(|s| if let Ok(s) = s.into_string() { Some(s) } else { None })
-            .unwrap_or(String::from("unknown"));
+            .unwrap_or_else(|| String::from("unknown"));
 
         let dev_path = format!("/dev/tape/by-id/scsi-{}-nst", serial);
 

src/tape/drive/linux_tape.rs

@@ -98,16 +98,14 @@ impl LinuxTapeDrive {
 
             if drive_status.blocksize == 0 {
                 // device is variable block size - OK
-            } else {
-                if drive_status.blocksize != PROXMOX_TAPE_BLOCK_SIZE as u32 {
-                    eprintln!("device is in fixed block size mode with wrong size ({} bytes)", drive_status.blocksize);
-                    eprintln!("trying to set variable block size mode...");
-                    if handle.set_block_size(0).is_err() {
-                        bail!("set variable block size mod failed - device uses wrong blocksize.");
-                    }
-                } else {
-                    // device is in fixed block size mode with correct block size
+            } else if drive_status.blocksize != PROXMOX_TAPE_BLOCK_SIZE as u32 {
+                eprintln!("device is in fixed block size mode with wrong size ({} bytes)", drive_status.blocksize);
+                eprintln!("trying to set variable block size mode...");
+                if handle.set_block_size(0).is_err() {
+                    bail!("set variable block size mod failed - device uses wrong blocksize.");
                 }
+            } else {
+                // device is in fixed block size mode with correct block size
             }
 
             // Only root can set driver options, so we cannot
@@ -528,7 +526,7 @@ impl TapeDriver for LinuxTapeHandle {
         let result: Result<u64, String> = serde_json::from_str(&output)?;
         result
             .map_err(|err| format_err!("{}", err))
-            .map(|bits| TapeAlertFlags::from_bits_truncate(bits))
+            .map(TapeAlertFlags::from_bits_truncate)
     }
 
     /// Set or clear encryption key

src/tape/drive/mam.rs

@@ -32,7 +32,7 @@ enum MamFormat {
     DEC,
 }
 
-static MAM_ATTRIBUTES: &'static [ (u16, u16, MamFormat, &'static str) ] = &[
+static MAM_ATTRIBUTES: &[ (u16, u16, MamFormat, &str) ] = &[
     (0x00_00, 8, MamFormat::DEC, "Remaining Capacity In Partition"),
     (0x00_01, 8, MamFormat::DEC, "Maximum Capacity In Partition"),
     (0x00_02, 8, MamFormat::DEC, "Tapealert Flags"),

src/tape/drive/mod.rs

@@ -258,13 +258,13 @@ pub fn required_media_changer(
 ) -> Result<(Box<dyn MediaChange>, String), Error> {
     match media_changer(config, drive) {
         Ok(Some(result)) => {
-            return Ok(result);
+            Ok(result)
         }
         Ok(None) => {
             bail!("drive '{}' has no associated changer device", drive);
         },
         Err(err) => {
-            return Err(err);
+            Err(err)
         }
     }
 }
@@ -339,7 +339,7 @@ pub fn request_and_load_media(
 
                     let media_id = check_label(handle.as_mut(), &label.uuid)?;
 
-                    return Ok((handle, media_id));
+                    Ok((handle, media_id))
                 }
                 "linux" => {
                     let drive_config = LinuxTapeDrive::deserialize(config)?;
@@ -390,20 +390,18 @@ pub fn request_and_load_media(
                                         media_id.label.uuid.to_string(),
                                     ));
                                     return Ok((Box::new(handle), media_id));
-                                } else {
-                                    if Some(media_id.label.uuid.clone()) != last_media_uuid {
-                                        worker.log(format!(
-                                            "wrong media label {} ({})",
-                                            media_id.label.label_text,
-                                            media_id.label.uuid.to_string(),
-                                        ));
-                                        last_media_uuid = Some(media_id.label.uuid);
-                                    }
+                                } else if Some(media_id.label.uuid.clone()) != last_media_uuid {
+                                    worker.log(format!(
+                                        "wrong media label {} ({})",
+                                        media_id.label.label_text,
+                                        media_id.label.uuid.to_string(),
+                                    ));
+                                    last_media_uuid = Some(media_id.label.uuid);
                                 }
                             }
                             Ok((None, _)) => {
                                 if last_media_uuid.is_some() {
-                                    worker.log(format!("found empty media without label (please label all tapes first)"));
+                                    worker.log("found empty media without label (please label all tapes first)".to_string());
                                     last_media_uuid = None;
                                 }
                             }

src/tape/drive/tape_alert_flags.rs

@@ -17,6 +17,7 @@ bitflags::bitflags!{
     ///
     /// See LTO SCSI Reference LOG_SENSE - LP 2Eh: TapeAlerts
     pub struct TapeAlertFlags: u64 {
+        #[allow(clippy::eq_op)]
         const READ_WARNING = 1 << (0x0001 -1);
         const WRITE_WARNING = 1 << (0x0002 -1);
         const HARD_ERROR = 1 << (0x0003 -1);

src/tape/drive/virtual_tape.rs

@@ -168,8 +168,8 @@ impl VirtualTapeHandle {
             if path.is_file() && path.extension() == Some(std::ffi::OsStr::new("json")) {
                 if let Some(name) = path.file_stem() {
                     if let Some(name) = name.to_str() {
-                        if name.starts_with("tape-") {
-                            list.push(name[5..].to_string());
+                        if let Some(label) = name.strip_prefix("tape-") {
+                            list.push(label.to_string());
                         }
                     }
                 }

src/tape/drive/volume_statistics.rs

@@ -95,19 +95,16 @@ fn decode_volume_statistics(data: &[u8]) -> Result<Lp17VolumeStatistics, Error>
 
     let read_be_counter = |reader: &mut &[u8], len: u8| {
         let len = len as usize;
-
         if len == 0 || len > 8 {
             bail!("invalid conter size '{}'", len);
         }
         let mut buffer = [0u8; 8];
         reader.read_exact(&mut buffer[..len])?;
 
-        let mut value: u64 = 0;
-
-        for i in 0..len {
-            value = value << 8;
-            value = value | buffer[i] as u64;
-        }
+        let value = buffer
+            .iter()
+            .take(len)
+            .fold(0, |value, curr| (value << 8) | *curr as u64);
 
         Ok(value)
     };

src/tape/helpers/blocked_reader.rs

@@ -81,10 +81,8 @@ impl <R: Read> BlockedReader<R> {
 
         if size > buffer.payload.len() {
             proxmox::io_bail!("detected tape block with wrong payload size ({} > {}", size, buffer.payload.len());
-        } else if size == 0 {
-            if !found_end_marker{
-                proxmox::io_bail!("detected tape block with zero payload size");
-            }
+        } else if size == 0 && !found_end_marker {
+            proxmox::io_bail!("detected tape block with zero payload size");
         }
 
 
@@ -179,7 +177,7 @@ impl <R: Read> Read for BlockedReader<R> {
         }
 
         if rest <= 0 {
-            return Ok(0);
+            Ok(0)
         } else {
             let copy_len = if (buffer.len() as isize) < rest {
                 buffer.len()
@@ -189,7 +187,7 @@ impl <R: Read> Read for BlockedReader<R> {
             buffer[..copy_len].copy_from_slice(
                 &self.buffer.payload[self.read_pos..(self.read_pos + copy_len)]);
             self.read_pos += copy_len;
-            return Ok(copy_len);
+            Ok(copy_len)
         }
     }
 }

src/tape/helpers/blocked_writer.rs

@@ -77,7 +77,7 @@ impl <W: Write> BlockedWriter<W> {
             self.bytes_written += BlockHeader::SIZE;
 
         } else {
-            self.buffer_pos = self.buffer_pos + bytes;
+            self.buffer_pos += bytes;
         }
 
         Ok(bytes)

src/tape/helpers/snapshot_reader.rs

@@ -50,7 +50,7 @@ impl SnapshotReader {
             }
         };
 
-        let mut client_log_path = snapshot_path.clone();
+        let mut client_log_path = snapshot_path;
         client_log_path.push(CLIENT_LOG_BLOB_NAME);
 
         let mut file_list = Vec::new();

src/tape/inventory.rs

@@ -215,12 +215,13 @@ impl Inventory {
 
     /// find media by label_text
     pub fn find_media_by_label_text(&self, label_text: &str) -> Option<&MediaId> {
-        for (_uuid, entry) in &self.map {
+        self.map.values().find_map(|entry| {
             if entry.id.label.label_text == label_text {
-                return Some(&entry.id);
+                Some(&entry.id)
+            } else {
+                None
             }
-        }
-        None
+        })
     }
 
     /// Lookup media pool
@@ -245,7 +246,7 @@ impl Inventory {
     pub fn list_pool_media(&self, pool: &str) -> Vec<MediaId> {
         let mut list = Vec::new();
 
-        for (_uuid, entry) in &self.map {
+        for entry in self.map.values() {
             match entry.id.media_set_label {
                 None => continue, // not assigned to any pool
                 Some(ref set) => {
@@ -272,7 +273,7 @@ impl Inventory {
     pub fn list_used_media(&self) -> Vec<MediaId> {
         let mut list = Vec::new();
 
-        for (_uuid, entry) in &self.map {
+        for entry in self.map.values() {
             match entry.id.media_set_label {
                 None => continue, // not assigned to any pool
                 Some(ref set) => {
@@ -288,19 +289,17 @@ impl Inventory {
 
     /// List media not assigned to any pool
     pub fn list_unassigned_media(&self) -> Vec<MediaId> {
-        let mut list = Vec::new();
-
-        for (_uuid, entry) in &self.map {
+        self.map.values().filter_map(|entry|
             if entry.id.media_set_label.is_none() {
-                list.push(entry.id.clone());
+                Some(entry.id.clone())
+            } else {
+                None
             }
-        }
-
-        list
+        ).collect()
     }
 
     pub fn media_set_start_time(&self, media_set_uuid: &Uuid) -> Option<i64> {
-        self.media_set_start_times.get(media_set_uuid).map(|t| *t)
+        self.media_set_start_times.get(media_set_uuid).copied()
     }
 
     /// Lookup media set pool
@@ -383,7 +382,7 @@ impl Inventory {
 
         let set_list = self.map.values()
             .filter_map(|entry| entry.id.media_set_label.as_ref())
-            .filter(|set| &set.pool == &pool && set.uuid.as_ref() != [0u8;16]);
+            .filter(|set| set.pool == pool && set.uuid.as_ref() != [0u8;16]);
 
         for set in set_list {
             match last_set {
@@ -406,7 +405,7 @@ impl Inventory {
         // consistency check - must be the only set with that ctime
         let set_list = self.map.values()
             .filter_map(|entry| entry.id.media_set_label.as_ref())
-            .filter(|set| &set.pool == &pool && set.uuid.as_ref() != [0u8;16]);
+            .filter(|set| set.pool == pool && set.uuid.as_ref() != [0u8;16]);
 
         for set in set_list {
             if set.uuid != uuid && set.ctime >= ctime { // should not happen
@@ -437,7 +436,7 @@ impl Inventory {
 
         let set_list = self.map.values()
             .filter_map(|entry| entry.id.media_set_label.as_ref())
-            .filter(|set| (&set.uuid != media_set_uuid) && (&set.pool == &pool));
+            .filter(|set| (&set.uuid != media_set_uuid) && (set.pool == pool));
 
         let mut next_ctime = None;
 
@@ -522,7 +521,7 @@ impl Inventory {
     ) -> Result<String, Error> {
 
         if let Some(ctime) = self.media_set_start_time(media_set_uuid) {
-            let mut template = template.unwrap_or(String::from("%c"));
+            let mut template = template.unwrap_or_else(|| String::from("%c"));
             template = template.replace("%id%", &media_set_uuid.to_string());
             proxmox::tools::time::strftime_local(&template, ctime)
         } else {
@@ -675,20 +674,18 @@ impl Inventory {
         for (uuid, entry) in self.map.iter_mut() {
             if let Some(changer_name) = online_map.lookup_changer(uuid) {
                 entry.location = Some(MediaLocation::Online(changer_name.to_string()));
-            } else {
-                if let Some(MediaLocation::Online(ref changer_name)) = entry.location {
-                    match online_map.online_map(changer_name) {
-                        None => {
-                            // no such changer device
-                            entry.location = Some(MediaLocation::Offline);
-                        }
-                        Some(None) => {
-                            // got no info - do nothing
-                        }
-                        Some(Some(_)) => {
-                            // media changer changed
-                            entry.location = Some(MediaLocation::Offline);
-                        }
+            } else if let Some(MediaLocation::Online(ref changer_name)) = entry.location {
+                match online_map.online_map(changer_name) {
+                    None => {
+                        // no such changer device
+                        entry.location = Some(MediaLocation::Offline);
+                    }
+                    Some(None) => {
+                        // got no info - do nothing
+                    }
+                    Some(Some(_)) => {
+                        // media changer changed
+                        entry.location = Some(MediaLocation::Offline);
                     }
                 }
             }

src/tape/media_catalog.rs

@@ -323,7 +323,7 @@ impl MediaCatalog {
 
     /// Returns the chunk archive file number
     pub fn lookup_snapshot(&self, snapshot: &str) -> Option<u64> {
-        self.snapshot_index.get(snapshot).map(|n| *n)
+        self.snapshot_index.get(snapshot).copied()
     }
 
     /// Test if the catalog already contain a chunk
@@ -333,7 +333,7 @@ impl MediaCatalog {
 
     /// Returns the chunk archive file number
     pub fn lookup_chunk(&self, digest: &[u8;32]) -> Option<u64> {
-        self.chunk_index.get(digest).map(|n| *n)
+        self.chunk_index.get(digest).copied()
     }
 
     fn check_register_label(&self, file_number: u64) -> Result<(), Error> {