use crate::bitrot::{create_bitrot_reader, create_bitrot_writer};
use crate::disk::error_reduce::{OBJECT_OP_IGNORED_ERRS, reduce_read_quorum_errs, reduce_write_quorum_errs};
use crate::disk::{
    self, CHECK_PART_DISK_NOT_FOUND, CHECK_PART_FILE_CORRUPT, CHECK_PART_FILE_NOT_FOUND, CHECK_PART_SUCCESS,
    conv_part_err_to_int, has_part_err,
};
use crate::erasure_coding;
use crate::erasure_coding::bitrot_verify;
use crate::error::{Error, Result};
use crate::global::GLOBAL_MRFState;
use crate::heal::data_usage_cache::DataUsageCache;
use crate::heal::heal_ops::{HealEntryFn, HealSequence};
use crate::store_api::ObjectToDelete;
use crate::{
    cache_value::metacache_set::{ListPathRawOptions, list_path_raw},
    config::{GLOBAL_StorageClass, storageclass},
    disk::{
        CheckPartsResp, DeleteOptions, DiskAPI, DiskInfo, DiskInfoOptions, DiskOption, DiskStore, FileInfoVersions,
        RUSTFS_META_BUCKET, RUSTFS_META_MULTIPART_BUCKET, RUSTFS_META_TMP_BUCKET, ReadMultipleReq, ReadMultipleResp, ReadOptions,
        UpdateMetadataOpts, endpoint::Endpoint, error::DiskError, format::FormatV3, new_disk,
    },
    error::{StorageError, to_object_err},
    global::{
        GLOBAL_BackgroundHealState, GLOBAL_LOCAL_DISK_MAP, GLOBAL_LOCAL_DISK_SET_DRIVES, get_global_deployment_id,
        is_dist_erasure,
    },
    heal::{
        data_usage::{DATA_USAGE_CACHE_NAME, DATA_USAGE_ROOT},
        data_usage_cache::{DataUsageCacheInfo, DataUsageEntry, DataUsageEntryInfo},
        heal_commands::{
            DRIVE_STATE_CORRUPT, DRIVE_STATE_MISSING, DRIVE_STATE_OFFLINE, DRIVE_STATE_OK, HEAL_DEEP_SCAN, HEAL_ITEM_OBJECT,
            HEAL_NORMAL_SCAN, HealOpts, HealScanMode, HealingTracker,
        },
        heal_ops::BG_HEALING_UUID,
    },
    store_api::{
        BucketInfo, BucketOptions, CompletePart, DeleteBucketOptions, DeletedObject, GetObjectReader, HTTPRangeSpec,
        ListMultipartsInfo, ListObjectsV2Info, MakeBucketOptions, MultipartInfo, MultipartUploadResult, ObjectIO, ObjectInfo,
        ObjectOptions, PartInfo, PutObjReader, StorageAPI,
    },
    store_init::load_format_erasure,
};
use crate::{disk::STORAGE_FORMAT_FILE, heal::mrf::PartialOperation};
use crate::{
    heal::data_scanner::{HEAL_DELETE_DANGLING, globalHealConfig},
    store_api::ListObjectVersionsInfo,
};
use bytes::Bytes;
use bytesize::ByteSize;
use chrono::Utc;
use futures::future::join_all;
use glob::Pattern;
use http::HeaderMap;
use lock::{LockApi, namespace_lock::NsLockMap};
use madmin::heal_commands::{HealDriveInfo, HealResultItem};
use md5::{Digest as Md5Digest, Md5};
use rand::{Rng, seq::SliceRandom};
use rustfs_filemeta::headers::RESERVED_METADATA_PREFIX_LOWER;
use rustfs_filemeta::{
    FileInfo, FileMeta, FileMetaShallowVersion, MetaCacheEntries, MetaCacheEntry, MetadataResolutionParams, ObjectPartInfo,
    RawFileInfo, file_info_from_raw,
    headers::{AMZ_OBJECT_TAGGING, AMZ_STORAGE_CLASS},
    merge_file_meta_versions,
};
use rustfs_rio::{EtagResolvable, HashReader, TryGetIndex as _, WarpReader};
use rustfs_utils::{
    HashAlgorithm,
    crypto::{base64_decode, base64_encode, hex},
    path::{SLASH_SEPARATOR, encode_dir_object, has_suffix, path_join_buf},
};
use sha2::Sha256;
use std::hash::Hash;
use std::mem;
use std::time::SystemTime;
use std::{
    collections::{HashMap, HashSet},
    io::{Cursor, Write},
    path::Path,
    sync::Arc,
    time::Duration,
};
use time::OffsetDateTime;
use tokio::{
    io::AsyncWrite,
    sync::{RwLock, broadcast},
};
use tokio::{
    select,
    sync::mpsc::{self, Sender},
    time::interval,
};
use tracing::error;
use tracing::{debug, info, warn};
use uuid::Uuid;
use workers::workers::Workers;

pub const DEFAULT_READ_BUFFER_SIZE: usize = 1024 * 1024;

#[derive(Debug)]
pub struct SetDisks {
    pub lockers: Vec<LockApi>,
    pub locker_owner: String,
    pub ns_mutex: Arc<RwLock<NsLockMap>>,
    pub disks: RwLock<Vec<Option<DiskStore>>>,
    pub set_endpoints: Vec<Endpoint>,
    pub set_drive_count: usize,
    pub default_parity_count: usize,
    pub set_index: usize,
    pub pool_index: usize,
    pub format: FormatV3,
}

impl SetDisks {
    async fn get_disks_internal(&self) -> Vec<Option<DiskStore>> {
        let rl = self.disks.read().await;

        rl.clone()
    }

    async fn get_online_disks(&self) -> Vec<Option<DiskStore>> {
        let mut disks = self.get_disks_internal().await;

        // TODO: diskinfo filter online

        let mut new_disk = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            if let Some(d) = disk {
                if d.is_online().await {
                    new_disk.push(disk.clone());
                }
            }
        }

        let mut rng = rand::rng();

        disks.shuffle(&mut rng);

        new_disk
    }
    async fn get_online_local_disks(&self) -> Vec<Option<DiskStore>> {
        let mut disks = self.get_online_disks().await;

        let mut rng = rand::rng();

        disks.shuffle(&mut rng);

        disks
            .into_iter()
            .filter(|v| v.as_ref().is_some_and(|d| d.is_local()))
            .collect()
    }

    pub async fn get_online_disks_with_healing(&self, incl_healing: bool) -> (Vec<DiskStore>, bool) {
        let (disks, _, healing) = self.get_online_disks_with_healing_and_info(incl_healing).await;
        (disks, healing > 0)
    }

    pub async fn get_online_disks_with_healing_and_info(&self, incl_healing: bool) -> (Vec<DiskStore>, Vec<DiskInfo>, usize) {
        let mut disks = self.get_disks_internal().await;

        let mut infos = Vec::with_capacity(disks.len());

        let mut futures = Vec::with_capacity(disks.len());
        let mut numbers: Vec<usize> = (0..disks.len()).collect();
        {
            let mut rng = rand::rng();
            disks.shuffle(&mut rng);

            numbers.shuffle(&mut rng);
        }

        for &i in numbers.iter() {
            let disk = disks[i].clone();
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.disk_info(&DiskInfoOptions::default()).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(res) => {
                    infos.push(res);
                }
                Err(err) => {
                    infos.push(DiskInfo {
                        error: err.to_string(),
                        ..Default::default()
                    });
                }
            }
        }

        let mut healing: usize = 0;

        let mut scanning_disks = Vec::new();
        let mut healing_disks = Vec::new();
        let mut scanning_infos = Vec::new();
        let mut healing_infos = Vec::new();

        let mut new_disks = Vec::new();
        let mut new_infos = Vec::new();

        for &i in numbers.iter() {
            let (info, disk) = (infos[i].clone(), disks[i].clone());
            if !info.error.is_empty() || disk.is_none() {
                continue;
            }

            if info.healing {
                healing += 1;
                if incl_healing {
                    healing_disks.push(disk.unwrap());
                    healing_infos.push(info);
                }

                continue;
            }

            if !info.healing {
                new_disks.push(disk.unwrap());
                new_infos.push(info);
            } else {
                scanning_disks.push(disk.unwrap());
                scanning_infos.push(info);
            }
        }

        new_disks.extend(scanning_disks);
        new_infos.extend(scanning_infos);
        new_disks.extend(healing_disks);
        new_infos.extend(healing_infos);

        (new_disks, new_infos, healing)
    }
    async fn _get_local_disks(&self) -> Vec<Option<DiskStore>> {
        let mut disks = self.get_disks_internal().await;

        let mut rng = rand::rng();

        disks.shuffle(&mut rng);

        disks
            .into_iter()
            .filter(|v| v.as_ref().is_some_and(|d| d.is_local()))
            .collect()
    }
    fn default_write_quorum(&self) -> usize {
        let mut data_count = self.set_drive_count - self.default_parity_count;
        if data_count == self.default_parity_count {
            data_count += 1
        }

        data_count
    }

    #[tracing::instrument(level = "debug", skip(disks, file_infos))]
    #[allow(clippy::type_complexity)]
    async fn rename_data(
        disks: &[Option<DiskStore>],
        src_bucket: &str,
        src_object: &str,
        file_infos: &[FileInfo],
        dst_bucket: &str,
        dst_object: &str,
        write_quorum: usize,
    ) -> disk::error::Result<(Vec<Option<DiskStore>>, Option<Vec<u8>>, Option<Uuid>)> {
        let mut futures = Vec::with_capacity(disks.len());

        // let mut ress = Vec::with_capacity(disks.len());
        let mut errs = Vec::with_capacity(disks.len());

        let src_bucket = Arc::new(src_bucket.to_string());
        let src_object = Arc::new(src_object.to_string());
        let dst_bucket = Arc::new(dst_bucket.to_string());
        let dst_object = Arc::new(dst_object.to_string());

        for (i, (disk, file_info)) in disks.iter().zip(file_infos.iter()).enumerate() {
            let mut file_info = file_info.clone();
            let disk = disk.clone();
            let src_bucket = src_bucket.clone();
            let src_object = src_object.clone();
            let dst_object = dst_object.clone();
            let dst_bucket = dst_bucket.clone();

            futures.push(tokio::spawn(async move {
                if file_info.erasure.index == 0 {
                    file_info.erasure.index = i + 1;
                }

                if !file_info.is_valid() {
                    return Err(DiskError::FileCorrupt);
                }

                if let Some(disk) = disk {
                    disk.rename_data(&src_bucket, &src_object, file_info, &dst_bucket, &dst_object)
                        .await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            }));
        }

        let mut disk_versions = vec![None; disks.len()];
        let mut data_dirs = vec![None; disks.len()];

        let results = join_all(futures).await;

        for (idx, result) in results.iter().enumerate() {
            match result.as_ref().map_err(|_| DiskError::Unexpected)? {
                Ok(res) => {
                    data_dirs[idx] = res.old_data_dir;
                    disk_versions[idx].clone_from(&res.sign);
                    errs.push(None);
                }
                Err(e) => {
                    errs.push(Some(e.clone()));
                }
            }
        }

        let mut futures = Vec::with_capacity(disks.len());
        if let Some(ret_err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, write_quorum) {
            // TODO: 并发
            for (i, err) in errs.iter().enumerate() {
                if err.is_some() {
                    continue;
                }

                if let Some(disk) = disks[i].as_ref() {
                    let fi = file_infos[i].clone();
                    let old_data_dir = data_dirs[i];
                    let disk = disk.clone();
                    let src_bucket = src_bucket.clone();
                    let src_object = src_object.clone();
                    futures.push(tokio::spawn(async move {
                        let _ = disk
                            .delete_version(
                                &src_bucket,
                                &src_object,
                                fi,
                                false,
                                DeleteOptions {
                                    undo_write: true,
                                    old_data_dir,
                                    ..Default::default()
                                },
                            )
                            .await
                            .map_err(|e| {
                                debug!("rename_data delete_version err {:?}", e);
                                e
                            });
                    }));
                }
            }

            let _ = join_all(futures).await;
            return Err(ret_err);
        }

        let versions = None;
        // TODO: reduceCommonVersions

        let data_dir = Self::reduce_common_data_dir(&data_dirs, write_quorum);

        // // TODO: reduce_common_data_dir
        // if let Some(old_dir) = rename_ress
        //     .iter()
        //     .filter_map(|v| if v.is_some() { v.as_ref().unwrap().old_data_dir } else { None })
        //     .map(|v| v.to_string())
        //     .next()
        // {
        //     let cm_errs = self.commit_rename_data_dir(&shuffle_disks, &bucket, &object, &old_dir).await;
        //     warn!("put_object commit_rename_data_dir:{:?}", &cm_errs);
        // }

        // self.delete_all(RUSTFS_META_TMP_BUCKET, &tmp_dir).await?;

        Ok((Self::eval_disks(disks, &errs), versions, data_dir))
    }

    fn reduce_common_data_dir(data_dirs: &Vec<Option<Uuid>>, write_quorum: usize) -> Option<Uuid> {
        let mut data_dirs_count = HashMap::new();

        for ddir in data_dirs {
            *data_dirs_count.entry(ddir).or_insert(0) += 1;
        }

        let mut max = 0;
        let mut data_dir = None;
        for (ddir, count) in data_dirs_count {
            if count > max {
                max = count;
                data_dir = *ddir;
            }
        }

        if max >= write_quorum { data_dir } else { None }
    }

    #[allow(dead_code)]
    #[tracing::instrument(level = "debug", skip(self, disks))]
    async fn commit_rename_data_dir(
        &self,
        disks: &[Option<DiskStore>],
        bucket: &str,
        object: &str,
        data_dir: &str,
        write_quorum: usize,
    ) -> disk::error::Result<()> {
        let file_path = Arc::new(format!("{}/{}", object, data_dir));
        let bucket = Arc::new(bucket.to_string());
        let futures = disks.iter().map(|disk| {
            let file_path = file_path.clone();
            let bucket = bucket.clone();
            let disk = disk.clone();
            tokio::spawn(async move {
                if let Some(disk) = disk {
                    (disk
                        .delete(
                            &bucket,
                            &file_path,
                            DeleteOptions {
                                recursive: true,
                                ..Default::default()
                            },
                        )
                        .await)
                        .err()
                } else {
                    Some(DiskError::DiskNotFound)
                }
            })
        });
        let errs: Vec<Option<DiskError>> = join_all(futures)
            .await
            .into_iter()
            .map(|e| e.unwrap_or(Some(DiskError::Unexpected)))
            .collect();

        if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, write_quorum) {
            return Err(err);
        }

        Ok(())
    }

    #[tracing::instrument(skip(disks))]
    async fn cleanup_multipart_path(disks: &[Option<DiskStore>], paths: &[String]) {
        let mut futures = Vec::with_capacity(disks.len());

        let mut errs = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.delete_paths(RUSTFS_META_MULTIPART_BUCKET, paths).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            })
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(_) => {
                    errs.push(None);
                }
                Err(e) => {
                    errs.push(Some(e));
                }
            }
        }

        if errs.iter().any(|e| e.is_some()) {
            warn!("cleanup_multipart_path errs {:?}", &errs);
        }
    }

    #[tracing::instrument(skip(disks, meta))]
    async fn rename_part(
        disks: &[Option<DiskStore>],
        src_bucket: &str,
        src_object: &str,
        dst_bucket: &str,
        dst_object: &str,
        meta: Bytes,
        write_quorum: usize,
    ) -> disk::error::Result<Vec<Option<DiskStore>>> {
        let src_bucket = Arc::new(src_bucket.to_string());
        let src_object = Arc::new(src_object.to_string());
        let dst_bucket = Arc::new(dst_bucket.to_string());
        let dst_object = Arc::new(dst_object.to_string());

        let mut errs = Vec::with_capacity(disks.len());

        let futures = disks.iter().map(|disk| {
            let disk = disk.clone();
            let meta = meta.clone();
            let src_bucket = src_bucket.clone();
            let src_object = src_object.clone();
            let dst_bucket = dst_bucket.clone();
            let dst_object = dst_object.clone();
            tokio::spawn(async move {
                if let Some(disk) = disk {
                    disk.rename_part(&src_bucket, &src_object, &dst_bucket, &dst_object, meta)
                        .await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            })
        });

        let results = join_all(futures).await;
        for result in results {
            match result? {
                Ok(_) => {
                    errs.push(None);
                }
                Err(e) => {
                    errs.push(Some(e));
                }
            }
        }

        if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, write_quorum) {
            warn!("rename_part errs {:?}", &errs);
            Self::cleanup_multipart_path(disks, &[dst_object.to_string(), format!("{}.meta", dst_object)]).await;
            return Err(err);
        }

        let disks = Self::eval_disks(disks, &errs);
        Ok(disks)
    }

    fn eval_disks(disks: &[Option<DiskStore>], errs: &[Option<DiskError>]) -> Vec<Option<DiskStore>> {
        if disks.len() != errs.len() {
            return Vec::new();
        }

        let mut online_disks = vec![None; disks.len()];

        for (i, err_op) in errs.iter().enumerate() {
            if err_op.is_none() {
                online_disks[i].clone_from(&disks[i]);
            }
        }

        online_disks
    }

    // async fn write_all(disks: &[Option<DiskStore>], bucket: &str, object: &str, buff: Vec<u8>) -> Vec<Option<Error>> {
    //     let mut futures = Vec::with_capacity(disks.len());

    //     let mut errors = Vec::with_capacity(disks.len());

    //     for disk in disks.iter() {
    //         if disk.is_none() {
    //             errors.push(Some(Error::new(DiskError::DiskNotFound)));
    //             continue;
    //         }
    //         let disk = disk.as_ref().unwrap();
    //         futures.push(disk.write_all(bucket, object, buff.clone()));
    //     }

    //     let results = join_all(futures).await;
    //     for result in results {
    //         match result {
    //             Ok(_) => {
    //                 errors.push(None);
    //             }
    //             Err(e) => {
    //                 errors.push(Some(e));
    //             }
    //         }
    //     }
    //     errors
    // }

    #[tracing::instrument(skip(disks, files))]
    async fn write_unique_file_info(
        disks: &[Option<DiskStore>],
        org_bucket: &str,
        bucket: &str,
        prefix: &str,
        files: &[FileInfo],
        write_quorum: usize,
    ) -> disk::error::Result<()> {
        let mut futures = Vec::with_capacity(disks.len());
        let mut errs = Vec::with_capacity(disks.len());

        for (i, disk) in disks.iter().enumerate() {
            let mut file_info = files[i].clone();
            file_info.erasure.index = i + 1;
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.write_metadata(org_bucket, bucket, prefix, file_info).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(_) => {
                    errs.push(None);
                }
                Err(e) => {
                    errs.push(Some(e));
                }
            }
        }

        if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, write_quorum) {
            // TODO: 并发
            for (i, err) in errs.iter().enumerate() {
                if err.is_some() {
                    continue;
                }

                if let Some(disk) = disks[i].as_ref() {
                    let _ = disk
                        .delete(
                            bucket,
                            &path_join_buf(&[prefix, STORAGE_FORMAT_FILE]),
                            DeleteOptions {
                                recursive: true,
                                ..Default::default()
                            },
                        )
                        .await
                        .map_err(|e| {
                            warn!("write meta revert err {:?}", e);
                            e
                        });
                }
            }

            return Err(err);
        }
        Ok(())
    }

    fn get_upload_id_dir(bucket: &str, object: &str, upload_id: &str) -> String {
        // warn!("get_upload_id_dir upload_id {:?}", upload_id);

        let upload_uuid = base64_decode(upload_id.as_bytes())
            .and_then(|v| {
                String::from_utf8(v).map_or(Ok(upload_id.to_owned()), |v| {
                    let parts: Vec<_> = v.splitn(2, '.').collect();
                    if parts.len() == 2 {
                        Ok(parts[1].to_string())
                    } else {
                        Ok(upload_id.to_string())
                    }
                })
            })
            .unwrap_or_default();

        format!("{}/{}", Self::get_multipart_sha_dir(bucket, object), upload_uuid)
    }

    fn get_multipart_sha_dir(bucket: &str, object: &str) -> String {
        let path = format!("{}/{}", bucket, object);
        let mut hasher = Sha256::new();
        hasher.update(path);
        hex(hasher.finalize())
    }

    fn common_parity(parities: &[i32], default_parity_count: i32) -> i32 {
        let n = parities.len() as i32;

        let mut occ_map: HashMap<i32, i32> = HashMap::new();
        for &p in parities {
            *occ_map.entry(p).or_insert(0) += 1;
        }

        let mut max_occ = 0;
        let mut cparity = 0;
        for (&parity, &occ) in &occ_map {
            if parity == -1 {
                // Ignore non defined parity
                continue;
            }

            let mut read_quorum = n - parity;
            if default_parity_count > 0 && parity == 0 {
                // In this case, parity == 0 implies that this object version is a
                // delete marker
                read_quorum = n / 2 + 1;
            }
            if occ < read_quorum {
                // Ignore this parity since we don't have enough shards for read quorum
                continue;
            }

            if occ > max_occ {
                max_occ = occ;
                cparity = parity;
            }
        }

        if max_occ == 0 {
            // Did not find anything useful
            return -1;
        }
        cparity
    }

    fn list_object_modtimes(parts_metadata: &[FileInfo], errs: &[Option<DiskError>]) -> Vec<Option<OffsetDateTime>> {
        let mut times = vec![None; parts_metadata.len()];

        for (i, metadata) in parts_metadata.iter().enumerate() {
            if errs[i].is_some() {
                continue;
            }

            times[i] = metadata.mod_time
        }

        times
    }

    fn common_time(times: &[Option<OffsetDateTime>], quorum: usize) -> Option<OffsetDateTime> {
        let (time, count) = Self::common_time_and_occurrence(times);
        if count >= quorum { time } else { None }
    }

    fn common_time_and_occurrence(times: &[Option<OffsetDateTime>]) -> (Option<OffsetDateTime>, usize) {
        let mut time_occurrence_map = HashMap::new();

        // Ignore the uuid sentinel and count the rest.
        for time in times.iter().flatten() {
            *time_occurrence_map.entry(time.unix_timestamp_nanos()).or_insert(0) += 1;
        }

        let mut maxima = 0; // Counter for remembering max occurrence of elements.
        let mut latest = 0;

        // Find the common cardinality from previously collected
        // occurrences of elements.
        for (&nano, &count) in &time_occurrence_map {
            if count < maxima {
                continue;
            }

            // We are at or above maxima
            if count > maxima || nano > latest {
                maxima = count;
                latest = nano;
            }
        }

        if latest == 0 {
            return (None, maxima);
        }

        if let Ok(time) = OffsetDateTime::from_unix_timestamp_nanos(latest) {
            (Some(time), maxima)
        } else {
            (None, maxima)
        }
    }

    fn common_etag(etags: &[Option<String>], quorum: usize) -> Option<String> {
        let (etag, count) = Self::common_etags(etags);
        if count >= quorum { etag } else { None }
    }

    fn common_etags(etags: &[Option<String>]) -> (Option<String>, usize) {
        let mut etags_map = HashMap::new();

        for etag in etags.iter().flatten() {
            *etags_map.entry(etag).or_insert(0) += 1;
        }

        let mut maxima = 0; // Counter for remembering max occurrence of elements.
        let mut latest = None;

        for (&etag, &count) in &etags_map {
            if count < maxima {
                continue;
            }

            // We are at or above maxima
            if count > maxima {
                maxima = count;
                latest = Some(etag.clone());
            }
        }

        (latest, maxima)
    }

    fn list_object_etags(parts_metadata: &[FileInfo], errs: &[Option<DiskError>]) -> Vec<Option<String>> {
        let mut etags = vec![None; parts_metadata.len()];

        for (i, metadata) in parts_metadata.iter().enumerate() {
            if errs[i].is_some() {
                continue;
            }

            if let Some(etag) = metadata.metadata.get("etag") {
                etags[i] = Some(etag.clone())
            }
        }

        etags
    }

    fn list_object_parities(parts_metadata: &[FileInfo], errs: &[Option<DiskError>]) -> Vec<i32> {
        let total_shards = parts_metadata.len();
        let half = total_shards as i32 / 2;
        let mut parities: Vec<i32> = vec![-1; total_shards];

        for (index, metadata) in parts_metadata.iter().enumerate() {
            if errs[index].is_some() {
                parities[index] = -1;
                continue;
            }

            if !metadata.is_valid() {
                parities[index] = -1;
                continue;
            }

            if metadata.deleted || metadata.size == 0 {
                parities[index] = half;
            // } else if metadata.transition_status == "TransitionComplete" {
            // TODO: metadata.transition_status
            //     parities[index] = total_shards - (total_shards / 2 + 1);
            } else {
                parities[index] = metadata.erasure.parity_blocks as i32;
            }
        }
        parities
    }

    // Returns per object readQuorum and writeQuorum
    // readQuorum is the min required disks to read data.
    // writeQuorum is the min required disks to write data.
    #[tracing::instrument(level = "debug", skip(parts_metadata))]
    fn object_quorum_from_meta(
        parts_metadata: &[FileInfo],
        errs: &[Option<DiskError>],
        default_parity_count: usize,
    ) -> disk::error::Result<(i32, i32)> {
        let expected_rquorum = if default_parity_count == 0 {
            parts_metadata.len()
        } else {
            parts_metadata.len() / 2
        };

        if let Some(err) = reduce_read_quorum_errs(errs, OBJECT_OP_IGNORED_ERRS, expected_rquorum) {
            // let object = parts_metadata.first().map(|v| v.name.clone()).unwrap_or_default();
            // error!("object_quorum_from_meta: {:?}, errs={:?}, object={:?}", err, errs, object);
            return Err(err);
        }

        if default_parity_count == 0 {
            return Ok((parts_metadata.len() as i32, parts_metadata.len() as i32));
        }

        let parities = Self::list_object_parities(parts_metadata, errs);

        let parity_blocks = Self::common_parity(&parities, default_parity_count as i32);

        if parity_blocks < 0 {
            error!("object_quorum_from_meta: parity_blocks < 0, errs={:?}", errs);
            return Err(DiskError::ErasureReadQuorum);
        }

        let data_blocks = parts_metadata.len() as i32 - parity_blocks;
        let write_quorum = if data_blocks == parity_blocks {
            data_blocks + 1
        } else {
            data_blocks
        };

        Ok((data_blocks, write_quorum))
    }

    #[tracing::instrument(level = "debug", skip(disks, parts_metadata))]
    fn list_online_disks(
        disks: &[Option<DiskStore>],
        parts_metadata: &[FileInfo],
        errs: &[Option<DiskError>],
        quorum: usize,
    ) -> (Vec<Option<DiskStore>>, Option<OffsetDateTime>, Option<String>) {
        let mod_times = Self::list_object_modtimes(parts_metadata, errs);
        let etags = Self::list_object_etags(parts_metadata, errs);

        let mod_time = Self::common_time(&mod_times, quorum);
        let etag = Self::common_etag(&etags, quorum);

        let mut new_disk = vec![None; disks.len()];

        for (i, &t) in mod_times.iter().enumerate() {
            if parts_metadata[i].is_valid() && mod_time == t {
                new_disk[i].clone_from(&disks[i]);
            }
        }

        (new_disk, mod_time, etag)
    }

    #[tracing::instrument(level = "debug", skip(self))]
    async fn check_upload_id_exists(
        &self,
        bucket: &str,
        object: &str,
        upload_id: &str,
        write: bool,
    ) -> Result<(FileInfo, Vec<FileInfo>)> {
        let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);
        let disks = self.disks.read().await;

        let disks = disks.clone();

        let (parts_metadata, errs) =
            Self::read_all_fileinfo(&disks, bucket, RUSTFS_META_MULTIPART_BUCKET, &upload_id_path, "", false, false).await?;

        let map_err_notfound = |err: DiskError| {
            if err == DiskError::FileNotFound {
                return StorageError::InvalidUploadID(bucket.to_owned(), object.to_owned(), upload_id.to_owned());
            }
            err.into()
        };

        let (read_quorum, write_quorum) =
            Self::object_quorum_from_meta(&parts_metadata, &errs, self.default_parity_count).map_err(map_err_notfound)?;

        if read_quorum < 0 {
            error!("check_upload_id_exists: read_quorum < 0, errs={:?}", errs);
            return Err(Error::ErasureReadQuorum);
        }

        if write_quorum < 0 {
            return Err(Error::ErasureWriteQuorum);
        }

        let mut quorum = read_quorum as usize;
        if write {
            quorum = write_quorum as usize;

            if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, quorum) {
                return Err(map_err_notfound(err));
            }
        } else if let Some(err) = reduce_read_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, quorum) {
            return Err(map_err_notfound(err));
        }

        let (_, mod_time, etag) = Self::list_online_disks(&disks, &parts_metadata, &errs, quorum);

        let fi = Self::pick_valid_fileinfo(&parts_metadata, mod_time, etag, quorum)?;

        Ok((fi, parts_metadata))
    }

    fn pick_valid_fileinfo(
        metas: &[FileInfo],
        mod_time: Option<OffsetDateTime>,
        etag: Option<String>,
        quorum: usize,
    ) -> disk::error::Result<FileInfo> {
        Self::find_file_info_in_quorum(metas, &mod_time, &etag, quorum)
    }

    fn find_file_info_in_quorum(
        metas: &[FileInfo],
        mod_time: &Option<OffsetDateTime>,
        etag: &Option<String>,
        quorum: usize,
    ) -> disk::error::Result<FileInfo> {
        if quorum < 1 {
            error!("find_file_info_in_quorum: quorum < 1");
            return Err(DiskError::ErasureReadQuorum);
        }

        let mut meta_hashs = vec![None; metas.len()];
        let mut hasher = Sha256::new();

        for (i, meta) in metas.iter().enumerate() {
            if !meta.is_valid() {
                continue;
            }

            let etag_only = mod_time.is_none() && etag.is_some() && meta.get_etag().is_some_and(|v| &v == etag.as_ref().unwrap());
            let mod_valid = mod_time == &meta.mod_time;

            if etag_only || mod_valid {
                for part in meta.parts.iter() {
                    let _ = hasher.write(format!("part.{}", part.number).as_bytes())?;
                    let _ = hasher.write(format!("part.{}", part.size).as_bytes())?;
                }

                if !meta.deleted && meta.size != 0 {
                    let _ = hasher.write(format!("{}+{}", meta.erasure.data_blocks, meta.erasure.parity_blocks).as_bytes())?;
                    let _ = hasher.write(format!("{:?}", meta.erasure.distribution).as_bytes())?;
                }

                if meta.is_remote() {
                    // TODO:
                }

                // TODO: IsEncrypted

                // TODO: IsCompressed

                hasher.flush()?;

                meta_hashs[i] = Some(hex(hasher.clone().finalize().as_slice()));

                hasher.reset();
            }
        }

        let mut count_map = HashMap::new();

        for hash in meta_hashs.iter().flatten() {
            *count_map.entry(hash).or_insert(0) += 1;
        }

        let mut max_val = None;
        let mut max_count = 0;

        for (&val, &count) in &count_map {
            if count > max_count {
                max_val = Some(val);
                max_count = count;
            }
        }

        if max_count < quorum {
            error!("find_file_info_in_quorum: max_count < quorum, max_val={:?}", max_val);
            return Err(DiskError::ErasureReadQuorum);
        }

        let mut found_fi = None;
        let mut found = false;

        let mut valid_obj_map = HashMap::new();

        for (i, op_hash) in meta_hashs.iter().enumerate() {
            if let Some(hash) = op_hash {
                if let Some(max_hash) = max_val {
                    if hash == max_hash {
                        if metas[i].is_valid() && !found {
                            found_fi = Some(metas[i].clone());
                            found = true;
                        }

                        let props = ObjProps {
                            mod_time: metas[i].mod_time,
                            num_versions: metas[i].num_versions,
                        };

                        *valid_obj_map.entry(props).or_insert(0) += 1;
                    }
                }
            }
        }

        if found {
            let mut fi = found_fi.unwrap();

            for (val, &count) in &valid_obj_map {
                if count > quorum {
                    fi.mod_time = val.mod_time;
                    fi.num_versions = val.num_versions;
                    fi.is_latest = val.mod_time.is_none();

                    break;
                }
            }

            return Ok(fi);
        }

        error!("find_file_info_in_quorum: fileinfo not found");

        Err(DiskError::ErasureReadQuorum)
    }

    #[tracing::instrument(level = "debug", skip(disks))]
    async fn read_all_fileinfo(
        disks: &[Option<DiskStore>],
        org_bucket: &str,
        bucket: &str,
        object: &str,
        version_id: &str,
        read_data: bool,
        healing: bool,
    ) -> disk::error::Result<(Vec<FileInfo>, Vec<Option<DiskError>>)> {
        let mut ress = Vec::with_capacity(disks.len());
        let mut errors = Vec::with_capacity(disks.len());
        let opts = Arc::new(ReadOptions {
            read_data,
            healing,
            ..Default::default()
        });
        let org_bucket = Arc::new(org_bucket.to_string());
        let bucket = Arc::new(bucket.to_string());
        let object = Arc::new(object.to_string());
        let version_id = Arc::new(version_id.to_string());
        let futures = disks.iter().map(|disk| {
            let disk = disk.clone();
            let opts = opts.clone();
            let org_bucket = org_bucket.clone();
            let bucket = bucket.clone();
            let object = object.clone();
            let version_id = version_id.clone();
            tokio::spawn(async move {
                if let Some(disk) = disk {
                    if version_id.is_empty() {
                        match disk.read_xl(&bucket, &object, read_data).await {
                            Ok(info) => {
                                let fi = file_info_from_raw(info, &bucket, &object, read_data).await?;
                                Ok(fi)
                            }
                            Err(err) => Err(err),
                        }
                    } else {
                        disk.read_version(&org_bucket, &bucket, &object, &version_id, &opts).await
                    }
                } else {
                    Err(DiskError::DiskNotFound)
                }
            })
        });

        let results = join_all(futures).await;
        for result in results {
            match result? {
                Ok(res) => {
                    ress.push(res);
                    errors.push(None);
                }
                Err(e) => {
                    ress.push(FileInfo::default());
                    errors.push(Some(e));
                }
            }
        }
        Ok((ress, errors))
    }

    async fn read_all_xl(
        disks: &[Option<DiskStore>],
        bucket: &str,
        object: &str,
        read_data: bool,
        incl_free_vers: bool,
    ) -> (Vec<FileInfo>, Vec<Option<DiskError>>) {
        let (fileinfos, errs) = Self::read_all_raw_file_info(disks, bucket, object, read_data).await;

        Self::pick_latest_quorum_files_info(fileinfos, errs, bucket, object, read_data, incl_free_vers).await
    }

    async fn read_all_raw_file_info(
        disks: &[Option<DiskStore>],
        bucket: &str,
        object: &str,
        read_data: bool,
    ) -> (Vec<Option<RawFileInfo>>, Vec<Option<DiskError>>) {
        let mut futures = Vec::with_capacity(disks.len());
        let mut ress = Vec::with_capacity(disks.len());
        let mut errors = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.read_xl(bucket, object, read_data).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(res) => {
                    ress.push(Some(res));
                    errors.push(None);
                }
                Err(e) => {
                    ress.push(None);
                    errors.push(Some(e));
                }
            }
        }

        (ress, errors)
    }

    async fn pick_latest_quorum_files_info(
        fileinfos: Vec<Option<RawFileInfo>>,
        errs: Vec<Option<DiskError>>,
        bucket: &str,
        object: &str,
        read_data: bool,
        _incl_free_vers: bool,
    ) -> (Vec<FileInfo>, Vec<Option<DiskError>>) {
        let mut metadata_array = vec![None; fileinfos.len()];
        let mut meta_file_infos = vec![FileInfo::default(); fileinfos.len()];
        let mut metadata_shallow_versions = vec![None; fileinfos.len()];

        let mut v2_bufs = {
            if !read_data {
                vec![Vec::new(); fileinfos.len()]
            } else {
                Vec::new()
            }
        };

        let mut errs = errs;

        for (idx, info_op) in fileinfos.iter().enumerate() {
            if let Some(info) = info_op {
                if !read_data {
                    v2_bufs[idx] = info.buf.clone();
                }

                let xlmeta = match FileMeta::load(&info.buf) {
                    Ok(res) => res,
                    Err(err) => {
                        errs[idx] = Some(err.into());
                        continue;
                    }
                };

                metadata_array[idx] = Some(xlmeta);
                meta_file_infos[idx] = FileInfo::default();
            }
        }

        for (idx, info_op) in metadata_array.iter().enumerate() {
            if let Some(info) = info_op {
                metadata_shallow_versions[idx] = Some(info.versions.clone());
            }
        }

        let shallow_versions: Vec<Vec<FileMetaShallowVersion>> = metadata_shallow_versions.iter().flatten().cloned().collect();

        let read_quorum = fileinfos.len().div_ceil(2);
        let versions = merge_file_meta_versions(read_quorum, false, 1, &shallow_versions);
        let meta = FileMeta {
            versions,
            ..Default::default()
        };

        let finfo = match meta.into_fileinfo(bucket, object, "", true, true) {
            Ok(res) => res,
            Err(err) => {
                for item in errs.iter_mut() {
                    if item.is_none() {
                        *item = Some(err.clone().into());
                    }
                }

                return (meta_file_infos, errs);
            }
        };

        if !finfo.is_valid() {
            for item in errs.iter_mut() {
                if item.is_none() {
                    *item = Some(DiskError::FileCorrupt);
                }
            }

            return (meta_file_infos, errs);
        }

        let vid = finfo.version_id.unwrap_or(Uuid::nil());

        for (idx, meta_op) in metadata_array.iter().enumerate() {
            if let Some(meta) = meta_op {
                match meta.into_fileinfo(bucket, object, vid.to_string().as_str(), read_data, true) {
                    Ok(res) => meta_file_infos[idx] = res,
                    Err(err) => errs[idx] = Some(err.into()),
                }
            }
        }

        (meta_file_infos, errs)
    }

    async fn read_multiple_files(disks: &[Option<DiskStore>], req: ReadMultipleReq, read_quorum: usize) -> Vec<ReadMultipleResp> {
        let mut futures = Vec::with_capacity(disks.len());
        let mut ress = Vec::with_capacity(disks.len());
        let mut errors = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            let req = req.clone();
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.read_multiple(req).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(res) => {
                    ress.push(Some(res));
                    errors.push(None);
                }
                Err(e) => {
                    ress.push(None);
                    errors.push(Some(e));
                }
            }
        }

        // debug!("ReadMultipleResp ress {:?}", ress);
        // debug!("ReadMultipleResp errors {:?}", errors);

        let mut ret = Vec::with_capacity(req.files.len());

        for want in req.files.iter() {
            let mut quorum = 0;

            let mut get_res = ReadMultipleResp::default();

            for res in ress.iter() {
                if res.is_none() {
                    continue;
                }

                let disk_res = res.as_ref().unwrap();

                for resp in disk_res.iter() {
                    if !resp.error.is_empty() || !resp.exists {
                        continue;
                    }

                    if &resp.file != want || resp.bucket != req.bucket || resp.prefix != req.prefix {
                        continue;
                    }
                    quorum += 1;

                    if get_res.mod_time > resp.mod_time || get_res.data.len() > resp.data.len() {
                        continue;
                    }

                    get_res = resp.clone();
                }
            }

            if quorum < read_quorum {
                // debug!("quorum < read_quorum: {} < {}", quorum, read_quorum);
                get_res.exists = false;
                get_res.error = Error::ErasureReadQuorum.to_string();
                get_res.data = Vec::new();
            }

            ret.push(get_res);
        }

        // log err

        ret
    }

    pub async fn connect_disks(&self) {
        let rl = self.disks.read().await;

        let disks = rl.clone();

        //  主动释放锁
        drop(rl);

        for (i, opdisk) in disks.iter().enumerate() {
            if let Some(disk) = opdisk {
                if disk.is_online().await && disk.get_disk_location().set_idx.is_some() {
                    info!("Disk {:?} is online", disk.to_string());
                    continue;
                }

                let _ = disk.close().await;
            }

            if let Some(endpoint) = self.set_endpoints.get(i) {
                info!("will renew disk, opdisk: {:?}", opdisk);
                self.renew_disk(endpoint).await;
            }
        }
    }

    pub async fn renew_disk(&self, ep: &Endpoint) {
        debug!("renew_disk start {:?}", ep);

        let (new_disk, fm) = match Self::connect_endpoint(ep).await {
            Ok(res) => res,
            Err(e) => {
                warn!("connect_endpoint err {:?}", &e);
                if ep.is_local && e == DiskError::UnformattedDisk {
                    info!("unformatteddisk will push_heal_local_disks, {:?}", ep);
                    GLOBAL_BackgroundHealState.push_heal_local_disks(&[ep.clone()]).await;
                }
                return;
            }
        };

        if new_disk.is_local() {
            if let Some(h) = new_disk.healing().await {
                if !h.finished {
                    GLOBAL_BackgroundHealState.push_heal_local_disks(&[new_disk.endpoint()]).await;
                }
            }
        }

        let (set_idx, disk_idx) = match self.find_disk_index(&fm) {
            Ok(res) => res,
            Err(e) => {
                warn!("find_disk_index err {:?}", e);
                return;
            }
        };

        // check endpoint 是否一致

        let _ = new_disk.set_disk_id(Some(fm.erasure.this)).await;

        if new_disk.is_local() {
            let mut global_local_disk_map = GLOBAL_LOCAL_DISK_MAP.write().await;
            let path = new_disk.endpoint().to_string();
            global_local_disk_map.insert(path, Some(new_disk.clone()));

            if is_dist_erasure().await {
                let mut local_set_drives = GLOBAL_LOCAL_DISK_SET_DRIVES.write().await;
                local_set_drives[self.pool_index][set_idx][disk_idx] = Some(new_disk.clone());
            }
        }

        debug!("renew_disk update {:?}", fm.erasure.this);

        let mut disk_lock = self.disks.write().await;
        disk_lock[disk_idx] = Some(new_disk);
    }

    fn find_disk_index(&self, fm: &FormatV3) -> Result<(usize, usize)> {
        self.format.check_other(fm)?;

        if fm.erasure.this.is_nil() {
            return Err(Error::other("DriveID: offline"));
        }

        for i in 0..self.format.erasure.sets.len() {
            for j in 0..self.format.erasure.sets[0].len() {
                if fm.erasure.this == self.format.erasure.sets[i][j] {
                    return Ok((i, j));
                }
            }
        }

        Err(Error::other("DriveID: not found"))
    }

    async fn connect_endpoint(ep: &Endpoint) -> disk::error::Result<(DiskStore, FormatV3)> {
        let disk = new_disk(ep, &DiskOption::default()).await?;

        let fm = load_format_erasure(&disk, false).await?;

        Ok((disk, fm))
    }

    // pub async fn walk_dir(&self, opts: &WalkDirOptions) -> (Vec<Option<Vec<MetaCacheEntry>>>, Vec<Option<Error>>) {
    //     let disks = self.disks.read().await;

    //     let disks = disks.clone();
    //     let mut futures = Vec::new();
    //     let mut errs = Vec::new();
    //     let mut ress = Vec::new();

    //     for disk in disks.iter() {
    //         let opts = opts.clone();
    //         futures.push(async move {
    //             if let Some(disk) = disk {
    //                 disk.walk_dir(opts, &mut Writer::NotUse).await
    //             } else {
    //                 Err(DiskError::DiskNotFound)
    //             }
    //         });
    //     }

    //     let results = join_all(futures).await;

    //     for res in results {
    //         match res {
    //             Ok(entrys) => {
    //                 ress.push(Some(entrys));
    //                 errs.push(None);
    //             }
    //             Err(e) => {
    //                 ress.push(None);
    //                 errs.push(Some(e));
    //             }
    //         }
    //     }

    //     (ress, errs)
    // }

    // async fn remove_object_part(
    //     &self,
    //     bucket: &str,
    //     object: &str,
    //     upload_id: &str,
    //     data_dir: &str,
    //     part_num: usize,
    // ) -> Result<()> {
    //     let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);
    //     let disks = self.disks.read().await;

    //     let disks = disks.clone();

    //     let file_path = format!("{}/{}/part.{}", upload_id_path, data_dir, part_num);

    //     let mut futures = Vec::with_capacity(disks.len());
    //     let mut errors = Vec::with_capacity(disks.len());

    //     for disk in disks.iter() {
    //         let file_path = file_path.clone();
    //         let meta_file_path = format!("{}.meta", file_path);

    //         futures.push(async move {
    //             if let Some(disk) = disk {
    //                 disk.delete(RUSTFS_META_MULTIPART_BUCKET, &file_path, DeleteOptions::default())
    //                     .await?;
    //                 disk.delete(RUSTFS_META_MULTIPART_BUCKET, &meta_file_path, DeleteOptions::default())
    //                     .await
    //             } else {
    //                 Err(DiskError::DiskNotFound)
    //             }
    //         });
    //     }

    //     let results = join_all(futures).await;
    //     for result in results {
    //         match result {
    //             Ok(_) => {
    //                 errors.push(None);
    //             }
    //             Err(e) => {
    //                 errors.push(Some(e));
    //             }
    //         }
    //     }

    //     Ok(())
    // }
    // async fn remove_part_meta(&self, bucket: &str, object: &str, upload_id: &str, data_dir: &str, part_num: usize) -> Result<()> {
    //     let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);
    //     let disks = self.disks.read().await;

    //     let disks = disks.clone();
    //     // let disks = Self::shuffle_disks(&disks, &fi.erasure.distribution);

    //     let file_path = format!("{}/{}/part.{}.meta", upload_id_path, data_dir, part_num);

    //     let mut futures = Vec::with_capacity(disks.len());
    //     let mut errors = Vec::with_capacity(disks.len());

    //     for disk in disks.iter() {
    //         let file_path = file_path.clone();
    //         futures.push(async move {
    //             if let Some(disk) = disk {
    //                 disk.delete(RUSTFS_META_MULTIPART_BUCKET, &file_path, DeleteOptions::default())
    //                     .await
    //             } else {
    //                 Err(DiskError::DiskNotFound)
    //             }
    //         });
    //     }

    //     let results = join_all(futures).await;
    //     for result in results {
    //         match result {
    //             Ok(_) => {
    //                 errors.push(None);
    //             }
    //             Err(e) => {
    //                 errors.push(Some(e));
    //             }
    //         }
    //     }

    //     Ok(())
    // }

    #[tracing::instrument(skip(self))]
    pub async fn delete_all(&self, bucket: &str, prefix: &str) -> Result<()> {
        let disks = self.disks.read().await;

        let disks = disks.clone();

        let mut futures = Vec::with_capacity(disks.len());
        let mut errors = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.delete(
                        bucket,
                        prefix,
                        DeleteOptions {
                            recursive: true,
                            ..Default::default()
                        },
                    )
                    .await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(_) => {
                    errors.push(None);
                }
                Err(e) => {
                    errors.push(Some(e));
                }
            }
        }

        // debug!("delete_all errs {:?}", &errors);

        Ok(())
    }

    // 打乱顺序
    fn shuffle_disks_and_parts_metadata_by_index(
        disks: &[Option<DiskStore>],
        parts_metadata: &[FileInfo],
        fi: &FileInfo,
    ) -> (Vec<Option<DiskStore>>, Vec<FileInfo>) {
        let mut shuffled_disks = vec![None; disks.len()];
        let mut shuffled_parts_metadata = vec![FileInfo::default(); parts_metadata.len()];
        let distribution = &fi.erasure.distribution;

        let mut inconsistent = 0;
        for (k, v) in parts_metadata.iter().enumerate() {
            if disks[k].is_none() {
                inconsistent += 1;
                continue;
            }

            if !v.is_valid() {
                inconsistent += 1;
                continue;
            }

            if distribution[k] != v.erasure.index {
                inconsistent += 1;
                continue;
            }

            let block_idx = distribution[k];
            shuffled_parts_metadata[block_idx - 1] = parts_metadata[k].clone();
            shuffled_disks[block_idx - 1].clone_from(&disks[k]);
        }

        if inconsistent < fi.erasure.parity_blocks {
            return (shuffled_disks, shuffled_parts_metadata);
        }

        Self::shuffle_disks_and_parts_metadata(disks, parts_metadata, fi)
    }

    // 打乱顺序
    fn shuffle_disks_and_parts_metadata(
        disks: &[Option<DiskStore>],
        parts_metadata: &[FileInfo],
        fi: &FileInfo,
    ) -> (Vec<Option<DiskStore>>, Vec<FileInfo>) {
        let init = fi.mod_time.is_none();

        let mut shuffled_disks = vec![None; disks.len()];
        let mut shuffled_parts_metadata = vec![FileInfo::default(); parts_metadata.len()];
        let distribution = &fi.erasure.distribution;

        for (k, v) in disks.iter().enumerate() {
            if v.is_none() {
                continue;
            }

            if !init && !parts_metadata[k].is_valid() {
                continue;
            }

            // if !init && fi.xlv1 != parts_metadata[k].xlv1 {
            //     continue;
            // }

            let block_idx = distribution[k];
            shuffled_parts_metadata[block_idx - 1] = parts_metadata[k].clone();
            shuffled_disks[block_idx - 1].clone_from(&disks[k]);
        }

        (shuffled_disks, shuffled_parts_metadata)
    }

    // Return shuffled partsMetadata depending on distribution.
    fn shuffle_parts_metadata(parts_metadata: &[FileInfo], distribution: &[usize]) -> Vec<FileInfo> {
        if distribution.is_empty() {
            return parts_metadata.to_vec();
        }
        let mut shuffled_parts_metadata = vec![FileInfo::default(); parts_metadata.len()];
        // Shuffle slice xl metadata for expected distribution.
        for index in 0..parts_metadata.len() {
            let block_index = distribution[index];
            shuffled_parts_metadata[block_index - 1] = parts_metadata[index].clone();
        }
        shuffled_parts_metadata
    }

    // shuffle_disks TODO: use origin value
    fn shuffle_disks(disks: &[Option<DiskStore>], distribution: &[usize]) -> Vec<Option<DiskStore>> {
        if distribution.is_empty() {
            return disks.to_vec();
        }

        let mut shuffled_disks = vec![None; disks.len()];

        for (i, v) in disks.iter().enumerate() {
            let idx = distribution[i];
            shuffled_disks[idx - 1].clone_from(v);
        }

        shuffled_disks
    }

    #[tracing::instrument(level = "debug", skip(self))]
    async fn get_object_fileinfo(
        &self,
        bucket: &str,
        object: &str,
        opts: &ObjectOptions,
        read_data: bool,
    ) -> Result<(FileInfo, Vec<FileInfo>, Vec<Option<DiskStore>>)> {
        let disks = self.disks.read().await;

        let disks = disks.clone();

        let vid = opts.version_id.clone().unwrap_or_default();

        // TODO: 优化并发 可用数量中断
        let (parts_metadata, errs) = Self::read_all_fileinfo(&disks, "", bucket, object, vid.as_str(), read_data, false).await?;
        // warn!("get_object_fileinfo parts_metadata {:?}", &parts_metadata);
        // warn!("get_object_fileinfo {}/{} errs {:?}", bucket, object, &errs);

        let _min_disks = self.set_drive_count - self.default_parity_count;

        let (read_quorum, _) = match Self::object_quorum_from_meta(&parts_metadata, &errs, self.default_parity_count)
            .map_err(|err| to_object_err(err.into(), vec![bucket, object]))
        {
            Ok(v) => v,
            Err(e) => {
                // error!("Self::object_quorum_from_meta: {:?}, bucket: {}, object: {}", &e, bucket, object);
                return Err(e);
            }
        };

        if let Some(err) = reduce_read_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, read_quorum as usize) {
            error!("reduce_read_quorum_errs: {:?}, bucket: {}, object: {}", &err, bucket, object);
            return Err(to_object_err(err.into(), vec![bucket, object]));
        }

        let (op_online_disks, mot_time, etag) = Self::list_online_disks(&disks, &parts_metadata, &errs, read_quorum as usize);

        let fi = Self::pick_valid_fileinfo(&parts_metadata, mot_time, etag, read_quorum as usize)?;
        if errs.iter().any(|err| err.is_some()) {
            GLOBAL_MRFState
                .add_partial(PartialOperation {
                    bucket: fi.volume.to_string(),
                    object: fi.name.to_string(),
                    queued: Utc::now(),
                    version_id: fi.version_id.map(|v| v.to_string()),
                    set_index: self.set_index,
                    pool_index: self.pool_index,
                    ..Default::default()
                })
                .await;
        }
        // debug!("get_object_fileinfo pick fi {:?}", &fi);

        // let online_disks: Vec<Option<DiskStore>> = op_online_disks.iter().filter(|v| v.is_some()).cloned().collect();

        Ok((fi, parts_metadata, op_online_disks))
    }

    #[allow(clippy::too_many_arguments)]
    #[tracing::instrument(
        level = "debug",
        skip( writer,disks,fi,files),
        fields(start_time=?time::OffsetDateTime::now_utc())
    )]
    async fn get_object_with_fileinfo<W>(
        // &self,
        bucket: &str,
        object: &str,
        offset: usize,
        length: i64,
        writer: &mut W,
        fi: FileInfo,
        files: Vec<FileInfo>,
        disks: &[Option<DiskStore>],
        set_index: usize,
        pool_index: usize,
    ) -> Result<()>
    where
        W: AsyncWrite + Send + Sync + Unpin + 'static,
    {
        let (disks, files) = Self::shuffle_disks_and_parts_metadata_by_index(disks, &files, &fi);

        let total_size = fi.size as usize;

        let length = if length < 0 {
            fi.size as usize - offset
        } else {
            length as usize
        };

        if offset > total_size || offset + length > total_size {
            error!("get_object_with_fileinfo offset out of range: {}, total_size: {}", offset, total_size);
            return Err(Error::other("offset out of range"));
        }

        let (part_index, mut part_offset) = fi.to_part_offset(offset)?;

        // debug!(
        //     "get_object_with_fileinfo start offset:{}, part_index:{},part_offset:{}",
        //     offset, part_index, part_offset
        // );

        let mut end_offset = offset;
        if length > 0 {
            end_offset += length - 1
        }

        let (last_part_index, _) = fi.to_part_offset(end_offset)?;

        let erasure = erasure_coding::Erasure::new(fi.erasure.data_blocks, fi.erasure.parity_blocks, fi.erasure.block_size);

        let mut total_readed = 0;
        for i in part_index..=last_part_index {
            if total_readed == length {
                break;
            }

            let part_number = fi.parts[i].number;
            let part_size = fi.parts[i].size;
            let mut part_length = part_size - part_offset;
            if part_length > (length - total_readed) {
                part_length = length - total_readed
            }

            let till_offset = erasure.shard_file_offset(part_offset, part_length, part_size);

            let mut readers = Vec::with_capacity(disks.len());
            let mut errors = Vec::with_capacity(disks.len());
            for (idx, disk_op) in disks.iter().enumerate() {
                match create_bitrot_reader(
                    files[idx].data.as_deref(),
                    disk_op.as_ref(),
                    bucket,
                    &format!("{}/{}/part.{}", object, files[idx].data_dir.unwrap_or_default(), part_number),
                    part_offset,
                    till_offset,
                    erasure.shard_size(),
                    HashAlgorithm::HighwayHash256,
                )
                .await
                {
                    Ok(Some(reader)) => {
                        readers.push(Some(reader));
                        errors.push(None);
                    }
                    Ok(None) => {
                        readers.push(None);
                        errors.push(Some(DiskError::DiskNotFound));
                    }
                    Err(e) => {
                        readers.push(None);
                        errors.push(Some(e));
                    }
                }
            }

            let nil_count = errors.iter().filter(|&e| e.is_none()).count();
            if nil_count < erasure.data_shards {
                if let Some(read_err) = reduce_read_quorum_errs(&errors, OBJECT_OP_IGNORED_ERRS, erasure.data_shards) {
                    error!("create_bitrot_reader reduce_read_quorum_errs {:?}", &errors);
                    return Err(to_object_err(read_err.into(), vec![bucket, object]));
                }
                error!("create_bitrot_reader not enough disks to read: {:?}", &errors);
                return Err(Error::other(format!("not enough disks to read: {:?}", errors)));
            }

            // debug!(
            //     "read part {} part_offset {},part_length {},part_size {}  ",
            //     part_number, part_offset, part_length, part_size
            // );
            let (written, err) = erasure.decode(writer, readers, part_offset, part_length, part_size).await;
            if let Some(e) = err {
                let de_err: DiskError = e.into();
                let mut has_err = true;
                if written == part_length {
                    match de_err {
                        DiskError::FileNotFound | DiskError::FileCorrupt => {
                            error!("erasure.decode err 111 {:?}", &de_err);
                            GLOBAL_MRFState
                                .add_partial(PartialOperation {
                                    bucket: bucket.to_string(),
                                    object: object.to_string(),
                                    queued: Utc::now(),
                                    version_id: fi.version_id.map(|v| v.to_string()),
                                    set_index,
                                    pool_index,
                                    bitrot_scan: de_err == DiskError::FileCorrupt,
                                    ..Default::default()
                                })
                                .await;
                            has_err = false;
                        }
                        _ => {}
                    }
                }

                if has_err {
                    error!("erasure.decode err {} {:?}", written, &de_err);
                    return Err(de_err.into());
                }
            }

            // debug!("ec decode {} written size {}", part_number, n);

            total_readed += part_length;
            part_offset = 0;
        }

        // debug!("read end");

        Ok(())
    }

    async fn update_object_meta(
        &self,
        bucket: &str,
        object: &str,
        fi: FileInfo,
        disks: &[Option<DiskStore>],
    ) -> disk::error::Result<()> {
        self.update_object_meta_with_opts(bucket, object, fi, disks, &UpdateMetadataOpts::default())
            .await
    }
    async fn update_object_meta_with_opts(
        &self,
        bucket: &str,
        object: &str,
        fi: FileInfo,
        disks: &[Option<DiskStore>],
        opts: &UpdateMetadataOpts,
    ) -> disk::error::Result<()> {
        if fi.metadata.is_empty() {
            return Ok(());
        }

        let mut futures = Vec::with_capacity(disks.len());

        let mut errs = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            let fi = fi.clone();
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.update_metadata(bucket, object, fi, opts).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            })
        }

        let results = join_all(futures).await;
        for result in results {
            match result {
                Ok(_) => {
                    errs.push(None);
                }
                Err(e) => {
                    errs.push(Some(e));
                }
            }
        }

        if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, fi.write_quorum(self.default_write_quorum())) {
            return Err(err);
        }

        Ok(())
    }
    pub async fn list_and_heal(&self, bucket: &str, prefix: &str, opts: &HealOpts, heal_entry: HealEntryFn) -> Result<()> {
        let bucket = bucket.to_string();
        let (disks, _) = self.get_online_disk_with_healing(false).await?;
        if disks.is_empty() {
            return Err(Error::other("listAndHeal: No non-healing drives found"));
        }

        let expected_disks = disks.len() / 2 + 1;
        let fallback_disks = &disks[expected_disks..];
        let disks = &disks[..expected_disks];
        let resolver = MetadataResolutionParams {
            dir_quorum: 1,
            obj_quorum: 1,
            bucket: bucket.clone(),
            strict: false,
            ..Default::default()
        };
        let path = Path::new(prefix).parent().map_or("", |p| p.to_str().unwrap());
        let filter_prefix = prefix.trim_start_matches(path).trim_matches('/');
        let opts_clone = *opts;
        let bucket_agreed = bucket.clone();
        let bucket_partial = bucket.to_string();
        let (tx, rx) = broadcast::channel(1);
        let tx_agreed = tx.clone();
        let tx_partial = tx.clone();
        let func_agreed = heal_entry.clone();
        let func_partial = heal_entry.clone();
        let lopts = ListPathRawOptions {
            disks: disks.to_vec(),
            fallback_disks: fallback_disks.to_vec(),
            bucket: bucket.to_string(),
            path: path.to_string(),
            filter_prefix: {
                if filter_prefix.is_empty() {
                    None
                } else {
                    Some(filter_prefix.to_string())
                }
            },
            recursice: true,
            forward_to: None,
            min_disks: 1,
            report_not_found: false,
            per_disk_limit: 0,
            agreed: Some(Box::new(move |entry: MetaCacheEntry| {
                let heal_entry = func_agreed.clone();
                let tx_agreed = tx_agreed.clone();

                Box::pin({
                    let bucket_agreed = bucket_agreed.clone();
                    async move {
                        if heal_entry(bucket_agreed.clone(), entry.clone(), opts_clone.scan_mode)
                            .await
                            .is_err()
                        {
                            let _ = tx_agreed.send(true);
                        }
                    }
                })
            })),
            partial: Some(Box::new(move |entries: MetaCacheEntries, _: &[Option<DiskError>]| {
                let heal_entry = func_partial.clone();
                let tx_partial = tx_partial.clone();

                Box::pin({
                    let resolver_partial = resolver.clone();
                    let bucket_partial = bucket_partial.clone();
                    async move {
                        let entry = match entries.resolve(resolver_partial) {
                            Some(entry) => entry,
                            _ => match entries.first_found() {
                                (Some(entry), _) => entry,
                                _ => return,
                            },
                        };

                        if heal_entry(bucket_partial.clone(), entry.clone(), opts_clone.scan_mode)
                            .await
                            .is_err()
                        {
                            let _ = tx_partial.send(true);
                        }
                    }
                })
            })),
            finished: None,
        };

        _ = list_path_raw(rx, lopts)
            .await
            .map_err(|err| Error::other(format!("listPathRaw returned {}: bucket: {}, path: {}", err, bucket, path)));
        Ok(())
    }

    async fn get_online_disk_with_healing(&self, incl_healing: bool) -> Result<(Vec<Option<DiskStore>>, bool)> {
        let (new_disks, _, healing) = self.get_online_disk_with_healing_and_info(incl_healing).await?;
        Ok((new_disks, healing > 0))
    }

    async fn get_online_disk_with_healing_and_info(
        &self,
        incl_healing: bool,
    ) -> Result<(Vec<Option<DiskStore>>, Vec<DiskInfo>, usize)> {
        let mut infos = vec![DiskInfo::default(); self.disks.read().await.len()];
        for (idx, disk) in self.disks.write().await.iter().enumerate() {
            if let Some(disk) = disk {
                match disk.disk_info(&DiskInfoOptions::default()).await {
                    Ok(disk_info) => infos[idx] = disk_info,
                    Err(err) => infos[idx].error = err.to_string(),
                }
            } else {
                infos[idx].error = "disk not found".to_string();
            }
        }

        let mut new_disks = Vec::new();
        let mut healing_disks = Vec::new();
        let mut scanning_disks = Vec::new();
        let mut new_infos = Vec::new();
        let mut healing_infos = Vec::new();
        let mut scanning_infos = Vec::new();
        let mut healing = 0;

        infos.iter().zip(self.disks.write().await.iter()).for_each(|(info, disk)| {
            if info.error.is_empty() {
                if info.healing {
                    healing += 1;
                    if incl_healing {
                        healing_disks.push(disk.clone());
                        healing_infos.push(info.clone());
                    }
                } else if !info.scanning {
                    new_disks.push(disk.clone());
                    new_infos.push(info.clone());
                } else {
                    scanning_disks.push(disk.clone());
                    scanning_infos.push(info.clone());
                }
            }
        });

        // Prefer non-scanning disks over disks which are currently being scanned.
        new_disks.extend(scanning_disks);
        new_infos.extend(scanning_infos);

        // Then add healing disks.
        new_disks.extend(healing_disks);
        new_infos.extend(healing_infos);

        Ok((new_disks, new_infos, healing))
    }

    async fn heal_object(
        &self,
        bucket: &str,
        object: &str,
        version_id: &str,
        opts: &HealOpts,
    ) -> disk::error::Result<(HealResultItem, Option<DiskError>)> {
        info!("SetDisks heal_object");
        let mut result = HealResultItem {
            heal_item_type: HEAL_ITEM_OBJECT.to_string(),
            bucket: bucket.to_string(),
            object: object.to_string(),
            version_id: version_id.to_string(),
            disk_count: self.disks.read().await.len(),
            ..Default::default()
        };

        if !opts.no_lock {
            // TODO: locker
        }

        let version_id_op = {
            if version_id.is_empty() {
                None
            } else {
                Some(version_id.to_string())
            }
        };

        let disks = { self.disks.read().await.clone() };

        let (mut parts_metadata, errs) = Self::read_all_fileinfo(&disks, "", bucket, object, version_id, true, true).await?;
        if DiskError::is_all_not_found(&errs) {
            warn!(
                "heal_object failed, all obj part not found, bucket: {}, obj: {}, version_id: {}",
                bucket, object, version_id
            );
            let err = if !version_id.is_empty() {
                DiskError::FileVersionNotFound
            } else {
                DiskError::FileNotFound
            };
            // Nothing to do, file is already gone.
            return Ok((
                self.default_heal_result(FileInfo::default(), &errs, bucket, object, version_id)
                    .await,
                Some(err),
            ));
        }

        match Self::object_quorum_from_meta(&parts_metadata, &errs, self.default_parity_count) {
            Ok((read_quorum, _)) => {
                result.parity_blocks = result.disk_count - read_quorum as usize;
                result.data_blocks = read_quorum as usize;

                let ((online_disks, mod_time, etag), disk_len) = {
                    let disks = self.disks.read().await;
                    let disk_len = disks.len();
                    (Self::list_online_disks(&disks, &parts_metadata, &errs, read_quorum as usize), disk_len)
                };

                match Self::pick_valid_fileinfo(&parts_metadata, mod_time, etag, read_quorum as usize) {
                    Ok(lastest_meta) => {
                        let (available_disks, data_errs_by_disk, data_errs_by_part) = disks_with_all_parts(
                            &online_disks,
                            &mut parts_metadata,
                            &errs,
                            &lastest_meta,
                            bucket,
                            object,
                            opts.scan_mode,
                        )
                        .await?;

                        // info!(
                        //     "disks_with_all_parts: got available_disks: {:?}, data_errs_by_disk: {:?}, data_errs_by_part: {:?}, lastest_meta: {:?}",
                        //     available_disks, data_errs_by_disk, data_errs_by_part, lastest_meta
                        // );
                        let erasure = if !lastest_meta.deleted && !lastest_meta.is_remote() {
                            // Initialize erasure coding
                            erasure_coding::Erasure::new(
                                lastest_meta.erasure.data_blocks,
                                lastest_meta.erasure.parity_blocks,
                                lastest_meta.erasure.block_size,
                            )
                        } else {
                            erasure_coding::Erasure::default()
                        };

                        result.object_size =
                            ObjectInfo::from_file_info(&lastest_meta, bucket, object, true).get_actual_size()? as usize;
                        // Loop to find number of disks with valid data, per-drive
                        // data state and a list of outdated disks on which data needs
                        // to be healed.
                        let mut outdate_disks = vec![None; disk_len];
                        let mut disks_to_heal_count = 0;

                        // info!(
                        //     "errs: {:?}, data_errs_by_disk: {:?}, lastest_meta: {:?}",
                        //     errs, data_errs_by_disk, lastest_meta
                        // );
                        for index in 0..available_disks.len() {
                            let (yes, reason) = should_heal_object_on_disk(
                                &errs[index],
                                &data_errs_by_disk[&index],
                                &parts_metadata[index],
                                &lastest_meta,
                            );
                            if yes {
                                outdate_disks[index] = disks[index].clone();
                                disks_to_heal_count += 1;
                            }

                            let drive_state = match reason {
                                Some(err) => match err {
                                    DiskError::DiskNotFound => DRIVE_STATE_OFFLINE,
                                    DiskError::FileNotFound
                                    | DiskError::FileVersionNotFound
                                    | DiskError::VolumeNotFound
                                    | DiskError::PartMissingOrCorrupt
                                    | DiskError::OutdatedXLMeta => DRIVE_STATE_MISSING,
                                    _ => DRIVE_STATE_CORRUPT,
                                },
                                None => DRIVE_STATE_OK,
                            };
                            result.before.drives.push(HealDriveInfo {
                                uuid: "".to_string(),
                                endpoint: self.set_endpoints[index].to_string(),
                                state: drive_state.to_string(),
                            });

                            result.after.drives.push(HealDriveInfo {
                                uuid: "".to_string(),
                                endpoint: self.set_endpoints[index].to_string(),
                                state: drive_state.to_string(),
                            });
                        }

                        if DiskError::is_all_not_found(&errs) {
                            warn!(
                                "heal_object failed, all obj part not found, bucket: {}, obj: {}, version_id: {}",
                                bucket, object, version_id
                            );
                            let err = if !version_id.is_empty() {
                                DiskError::FileVersionNotFound
                            } else {
                                DiskError::FileNotFound
                            };

                            return Ok((
                                self.default_heal_result(FileInfo::default(), &errs, bucket, object, version_id)
                                    .await,
                                Some(err),
                            ));
                        }

                        if disks_to_heal_count == 0 {
                            return Ok((result, None));
                        }

                        if opts.dry_run {
                            return Ok((result, None));
                        }

                        if !lastest_meta.deleted && disks_to_heal_count > lastest_meta.erasure.parity_blocks {
                            error!(
                                "file({} : {}) part corrupt too much, can not to fix, disks_to_heal_count: {}, parity_blocks: {}",
                                bucket, object, disks_to_heal_count, lastest_meta.erasure.parity_blocks
                            );

                            // Allow for dangling deletes, on versions that have DataDir missing etc.
                            // this would end up restoring the correct readable versions.
                            return match self
                                .delete_if_dang_ling(
                                    bucket,
                                    object,
                                    &parts_metadata,
                                    &errs,
                                    &data_errs_by_part,
                                    ObjectOptions {
                                        version_id: version_id_op.clone(),
                                        ..Default::default()
                                    },
                                )
                                .await
                            {
                                Ok(m) => {
                                    let derr = if !version_id.is_empty() {
                                        DiskError::FileVersionNotFound
                                    } else {
                                        DiskError::FileNotFound
                                    };
                                    let mut t_errs = Vec::with_capacity(errs.len());
                                    for _ in 0..errs.len() {
                                        t_errs.push(None);
                                    }
                                    Ok((self.default_heal_result(m, &t_errs, bucket, object, version_id).await, Some(derr)))
                                }
                                Err(err) => {
                                    // t_errs = vec![Some(err.clone()); errs.len()];
                                    let mut t_errs = Vec::with_capacity(errs.len());
                                    for _ in 0..errs.len() {
                                        t_errs.push(Some(err.clone()));
                                    }

                                    Ok((
                                        self.default_heal_result(FileInfo::default(), &t_errs, bucket, object, version_id)
                                            .await,
                                        Some(err),
                                    ))
                                }
                            };
                        }

                        if !lastest_meta.deleted && lastest_meta.erasure.distribution.len() != available_disks.len() {
                            let err_str = format!(
                                "unexpected file distribution ({:?}) from available disks ({:?}), looks like backend disks have been manually modified refusing to heal {}/{}({})",
                                lastest_meta.erasure.distribution, available_disks, bucket, object, version_id
                            );
                            warn!(err_str);
                            let err = DiskError::other(err_str);
                            return Ok((
                                self.default_heal_result(lastest_meta, &errs, bucket, object, version_id)
                                    .await,
                                Some(err),
                            ));
                        }

                        let latest_disks = Self::shuffle_disks(&available_disks, &lastest_meta.erasure.distribution);
                        if !lastest_meta.deleted && lastest_meta.erasure.distribution.len() != outdate_disks.len() {
                            let err_str = format!(
                                "unexpected file distribution ({:?}) from outdated disks ({:?}), looks like backend disks have been manually modified refusing to heal {}/{}({})",
                                lastest_meta.erasure.distribution, outdate_disks, bucket, object, version_id
                            );
                            warn!(err_str);
                            let err = DiskError::other(err_str);
                            return Ok((
                                self.default_heal_result(lastest_meta, &errs, bucket, object, version_id)
                                    .await,
                                Some(err),
                            ));
                        }

                        if !lastest_meta.deleted && lastest_meta.erasure.distribution.len() != parts_metadata.len() {
                            let err_str = format!(
                                "unexpected file distribution ({:?}) from metadata entries ({:?}), looks like backend disks have been manually modified refusing to heal {}/{}({})",
                                lastest_meta.erasure.distribution,
                                parts_metadata.len(),
                                bucket,
                                object,
                                version_id
                            );
                            warn!(err_str);
                            let err = DiskError::other(err_str);
                            return Ok((
                                self.default_heal_result(lastest_meta, &errs, bucket, object, version_id)
                                    .await,
                                Some(err),
                            ));
                        }

                        let out_dated_disks = Self::shuffle_disks(&outdate_disks, &lastest_meta.erasure.distribution);
                        let mut parts_metadata =
                            Self::shuffle_parts_metadata(&parts_metadata, &lastest_meta.erasure.distribution);
                        let mut copy_parts_metadata = vec![None; parts_metadata.len()];
                        for (index, disk) in latest_disks.iter().enumerate() {
                            if disk.is_some() {
                                copy_parts_metadata[index] = Some(parts_metadata[index].clone());
                            }
                        }

                        let clean_file_info = |fi: &FileInfo| -> FileInfo {
                            let mut nfi = fi.clone();
                            if !nfi.is_remote() {
                                nfi.data = None;
                                nfi.erasure.index = 0;
                                nfi.erasure.checksums = Vec::new();
                            }
                            nfi
                        };
                        for (index, disk) in out_dated_disks.iter().enumerate() {
                            if disk.is_some() {
                                // Make sure to write the FileInfo information
                                // that is expected to be in quorum.
                                parts_metadata[index] = clean_file_info(&lastest_meta);
                            }
                        }

                        // We write at temporary location and then rename to final location.
                        let tmp_id = Uuid::new_v4().to_string();
                        let src_data_dir = lastest_meta.data_dir.unwrap().to_string();
                        let dst_data_dir = lastest_meta.data_dir.unwrap();

                        if !lastest_meta.deleted && !lastest_meta.is_remote() {
                            let erasure_info = lastest_meta.erasure;
                            for part in lastest_meta.parts.iter() {
                                let till_offset = erasure.shard_file_offset(0, part.size, part.size);
                                let checksum_algo = erasure_info.get_checksum_info(part.number).algorithm;
                                let mut readers = Vec::with_capacity(latest_disks.len());
                                let mut writers = Vec::with_capacity(out_dated_disks.len());
                                // let mut errors = Vec::with_capacity(out_dated_disks.len());
                                let mut prefer = vec![false; latest_disks.len()];
                                for (index, disk) in latest_disks.iter().enumerate() {
                                    if let (Some(disk), Some(metadata)) = (disk, &copy_parts_metadata[index]) {
                                        match create_bitrot_reader(
                                            metadata.data.as_deref(),
                                            Some(disk),
                                            bucket,
                                            &format!("{}/{}/part.{}", object, src_data_dir, part.number),
                                            0,
                                            till_offset,
                                            erasure.shard_size(),
                                            checksum_algo.clone(),
                                        )
                                        .await
                                        {
                                            Ok(Some(reader)) => {
                                                readers.push(Some(reader));
                                            }
                                            Ok(None) => {
                                                error!("heal_object disk not available");
                                                readers.push(None);
                                                continue;
                                            }
                                            Err(e) => {
                                                error!("heal_object read_file err: {:?}", e);
                                                readers.push(None);
                                                continue;
                                            }
                                        }

                                        prefer[index] = disk.host_name().is_empty();
                                    } else {
                                        readers.push(None);
                                        // errors.push(Some(DiskError::DiskNotFound));
                                    }
                                }

                                let is_inline_buffer = {
                                    if let Some(sc) = GLOBAL_StorageClass.get() {
                                        sc.should_inline(erasure.shard_file_size(lastest_meta.size), false)
                                    } else {
                                        false
                                    }
                                };

                                for disk in out_dated_disks.iter() {
                                    let writer = create_bitrot_writer(
                                        is_inline_buffer,
                                        disk.as_ref(),
                                        RUSTFS_META_TMP_BUCKET,
                                        &format!("{}/{}/part.{}", tmp_id, dst_data_dir, part.number),
                                        erasure.shard_file_size(part.size as i64),
                                        erasure.shard_size(),
                                        HashAlgorithm::HighwayHash256,
                                    )
                                    .await?;
                                    writers.push(Some(writer));

                                    // if let Some(disk) = disk {
                                    //     // let filewriter = {
                                    //     //     if is_inline_buffer {
                                    //     //         Box::new(Cursor::new(Vec::new()))
                                    //     //     } else {
                                    //     //         let disk = disk.clone();
                                    //     //         let part_path = format!("{}/{}/part.{}", tmp_id, dst_data_dir, part.number);
                                    //     //         disk.create_file("", RUSTFS_META_TMP_BUCKET, &part_path, 0).await?
                                    //     //     }
                                    //     // };

                                    //     if is_inline_buffer {
                                    //         let writer = BitrotWriter::new(
                                    //             Writer::from_cursor(Cursor::new(Vec::new())),
                                    //             erasure.shard_size(),
                                    //             HashAlgorithm::HighwayHash256,
                                    //         );
                                    //         writers.push(Some(writer));
                                    //     } else {
                                    //         let f = disk
                                    //             .create_file(
                                    //                 "",
                                    //                 RUSTFS_META_TMP_BUCKET,
                                    //                 &format!("{}/{}/part.{}", tmp_id, dst_data_dir, part.number),
                                    //                 0,
                                    //             )
                                    //             .await?;
                                    //         let writer = BitrotWriter::new(
                                    //             Writer::from_tokio_writer(f),
                                    //             erasure.shard_size(),
                                    //             HashAlgorithm::HighwayHash256,
                                    //         );
                                    //         writers.push(Some(writer));
                                    //     }

                                    //     // let writer = new_bitrot_filewriter(
                                    //     //     disk.clone(),
                                    //     //     RUSTFS_META_TMP_BUCKET,
                                    //     //     format!("{}/{}/part.{}", tmp_id, dst_data_dir, part.number).as_str(),
                                    //     //     is_inline_buffer,
                                    //     //     DEFAULT_BITROT_ALGO,
                                    //     //     erasure.shard_size(erasure.block_size),
                                    //     // )
                                    //     // .await?;

                                    //     // writers.push(Some(writer));
                                    // } else {
                                    //     writers.push(None);
                                    // }
                                }

                                // Heal each part. erasure.Heal() will write the healed
                                // part to .rustfs/tmp/uuid/ which needs to be renamed
                                // later to the final location.
                                erasure.heal(&mut writers, readers, part.size, &prefer).await?;
                                // close_bitrot_writers(&mut writers).await?;

                                for (index, disk) in out_dated_disks.iter().enumerate() {
                                    if disk.is_none() {
                                        continue;
                                    }

                                    if writers[index].is_none() {
                                        outdate_disks[index] = None;
                                        disks_to_heal_count -= 1;
                                        continue;
                                    }

                                    parts_metadata[index].data_dir = Some(dst_data_dir);
                                    parts_metadata[index].add_object_part(
                                        part.number,
                                        part.etag.clone(),
                                        part.size,
                                        part.mod_time,
                                        part.actual_size,
                                        part.index.clone(),
                                    );
                                    if is_inline_buffer {
                                        if let Some(writer) = writers[index].take() {
                                            // if let Some(w) = writer.as_any().downcast_ref::<BitrotFileWriter>() {
                                            //     parts_metadata[index].data = Some(w.inline_data().to_vec());
                                            // }
                                            parts_metadata[index].data =
                                                Some(writer.into_inline_data().map(bytes::Bytes::from).unwrap_or_default());
                                        }
                                        parts_metadata[index].set_inline_data();
                                    } else {
                                        parts_metadata[index].data = None;
                                    }
                                }

                                if disks_to_heal_count == 0 {
                                    return Ok((
                                        result,
                                        Some(DiskError::other(format!(
                                            "all drives had write errors, unable to heal {}/{}",
                                            bucket, object
                                        ))),
                                    ));
                                }
                            }
                        }

                        // Rename from tmp location to the actual location.
                        for (index, disk) in out_dated_disks.iter().enumerate() {
                            if let Some(disk) = disk {
                                // record the index of the updated disks
                                parts_metadata[index].erasure.index = index + 1;
                                // Attempt a rename now from healed data to final location.
                                parts_metadata[index].set_healing();

                                info!(
                                    "rename temp data, src_volume: {}, src_path: {}, dst_volume: {}, dst_path: {}",
                                    RUSTFS_META_TMP_BUCKET, tmp_id, bucket, object
                                );
                                if let Err(err) = disk
                                    .rename_data(RUSTFS_META_TMP_BUCKET, &tmp_id, parts_metadata[index].clone(), bucket, object)
                                    .await
                                {
                                    info!("rename temp data err: {}", err.to_string());
                                    // self.delete_all(RUSTFS_META_TMP_BUCKET, &tmp_id).await?;
                                    return Ok((result, Some(err)));
                                }

                                info!("remove temp object, volume: {}, path: {}", RUSTFS_META_TMP_BUCKET, tmp_id);
                                self.delete_all(RUSTFS_META_TMP_BUCKET, &tmp_id)
                                    .await
                                    .map_err(DiskError::other)?;
                                if parts_metadata[index].is_remote() {
                                    let rm_data_dir = parts_metadata[index].data_dir.unwrap().to_string();
                                    let d_path = Path::new(&encode_dir_object(object)).join(rm_data_dir);
                                    disk.delete(
                                        bucket,
                                        d_path.to_str().unwrap(),
                                        DeleteOptions {
                                            immediate: true,
                                            recursive: true,
                                            ..Default::default()
                                        },
                                    )
                                    .await?;
                                }

                                for (i, v) in result.before.drives.iter().enumerate() {
                                    if v.endpoint == disk.endpoint().to_string() {
                                        result.after.drives[i].state = DRIVE_STATE_OK.to_string();
                                    }
                                }
                            }
                        }

                        Ok((result, None))
                    }
                    Err(err) => {
                        warn!("heal_object can not pick valid file info");
                        Ok((result, Some(err)))
                    }
                }
            }
            Err(err) => {
                let data_errs_by_part = HashMap::new();
                match self
                    .delete_if_dang_ling(
                        bucket,
                        object,
                        &parts_metadata,
                        &errs,
                        &data_errs_by_part,
                        ObjectOptions {
                            version_id: version_id_op.clone(),
                            ..Default::default()
                        },
                    )
                    .await
                {
                    Ok(m) => {
                        let err = if !version_id.is_empty() {
                            DiskError::FileVersionNotFound
                        } else {
                            DiskError::FileNotFound
                        };
                        Ok((self.default_heal_result(m, &errs, bucket, object, version_id).await, Some(err)))
                    }
                    Err(_) => Ok((
                        self.default_heal_result(FileInfo::default(), &errs, bucket, object, version_id)
                            .await,
                        Some(err),
                    )),
                }
            }
        }
    }

    async fn heal_object_dir(
        &self,
        bucket: &str,
        object: &str,
        dry_run: bool,
        remove: bool,
    ) -> Result<(HealResultItem, Option<DiskError>)> {
        let disks = {
            let disks = self.disks.read().await;
            disks.clone()
        };
        let mut result = HealResultItem {
            heal_item_type: HEAL_ITEM_OBJECT.to_string(),
            bucket: bucket.to_string(),
            object: object.to_string(),
            disk_count: self.disks.read().await.len(),
            parity_blocks: self.default_parity_count,
            data_blocks: disks.len() - self.default_parity_count,
            object_size: 0,
            ..Default::default()
        };

        result.before.drives = vec![HealDriveInfo::default(); disks.len()];
        result.after.drives = vec![HealDriveInfo::default(); disks.len()];

        let errs = stat_all_dirs(&disks, bucket, object).await;
        let dang_ling_object = is_object_dir_dang_ling(&errs);
        if dang_ling_object && !dry_run && remove {
            let mut futures = Vec::with_capacity(disks.len());
            for disk in disks.iter().flatten() {
                let disk = disk.clone();
                let bucket = bucket.to_string();
                let object = object.to_string();
                futures.push(tokio::spawn(async move {
                    let _ = disk
                        .delete(
                            &bucket,
                            &object,
                            DeleteOptions {
                                recursive: false,
                                immediate: false,
                                ..Default::default()
                            },
                        )
                        .await;
                }));
            }

            // ignore errors
            let _ = join_all(futures).await;
        }

        for (err, drive) in errs.iter().zip(self.set_endpoints.iter()) {
            let endpoint = drive.to_string();
            let drive_state = match err {
                Some(err) => match err {
                    DiskError::DiskNotFound => DRIVE_STATE_OFFLINE,
                    DiskError::FileNotFound | DiskError::VolumeNotFound => DRIVE_STATE_MISSING,
                    _ => DRIVE_STATE_CORRUPT,
                },
                None => DRIVE_STATE_OK,
            };
            result.before.drives.push(HealDriveInfo {
                uuid: "".to_string(),
                endpoint: endpoint.clone(),
                state: drive_state.to_string(),
            });

            result.after.drives.push(HealDriveInfo {
                uuid: "".to_string(),
                endpoint,
                state: drive_state.to_string(),
            });
        }

        if dang_ling_object || DiskError::is_all_not_found(&errs) {
            return Ok((result, Some(DiskError::FileNotFound)));
        }

        if dry_run {
            // Quit without try to heal the object dir
            return Ok((result, None));
        }
        for (index, (err, disk)) in errs.iter().zip(disks.iter()).enumerate() {
            if let (Some(DiskError::VolumeNotFound | DiskError::FileNotFound), Some(disk)) = (err, disk) {
                let vol_path = Path::new(bucket).join(object);
                let drive_state = match disk.make_volume(vol_path.to_str().unwrap()).await {
                    Ok(_) => DRIVE_STATE_OK,
                    Err(merr) => match merr {
                        DiskError::VolumeExists => DRIVE_STATE_OK,
                        DiskError::DiskNotFound => DRIVE_STATE_OFFLINE,
                        _ => DRIVE_STATE_CORRUPT,
                    },
                };
                result.after.drives[index].state = drive_state.to_string();
            }
        }

        Ok((result, None))
    }

    async fn default_heal_result(
        &self,
        lfi: FileInfo,
        errs: &[Option<DiskError>],
        bucket: &str,
        object: &str,
        version_id: &str,
    ) -> HealResultItem {
        let disk_len = { self.disks.read().await.len() };
        let mut result = HealResultItem {
            heal_item_type: HEAL_ITEM_OBJECT.to_string(),
            bucket: bucket.to_string(),
            object: object.to_string(),
            object_size: lfi.size as usize,
            version_id: version_id.to_string(),
            disk_count: disk_len,
            ..Default::default()
        };

        if lfi.is_valid() {
            result.parity_blocks = lfi.erasure.parity_blocks;
        } else {
            result.parity_blocks = self.default_parity_count;
        }

        result.data_blocks = disk_len - result.parity_blocks;

        for (index, disk) in self.disks.read().await.iter().enumerate() {
            if disk.is_none() {
                result.before.drives.push(HealDriveInfo {
                    uuid: "".to_string(),
                    endpoint: self.set_endpoints[index].to_string(),
                    state: DRIVE_STATE_OFFLINE.to_string(),
                });

                result.after.drives.push(HealDriveInfo {
                    uuid: "".to_string(),
                    endpoint: self.set_endpoints[index].to_string(),
                    state: DRIVE_STATE_OFFLINE.to_string(),
                });
            }

            let mut drive_state = DRIVE_STATE_CORRUPT;
            if let Some(err) = &errs[index] {
                if err == &DiskError::FileNotFound || err == &DiskError::VolumeNotFound {
                    drive_state = DRIVE_STATE_MISSING;
                }
            } else {
                drive_state = DRIVE_STATE_OK;
            }

            result.before.drives.push(HealDriveInfo {
                uuid: "".to_string(),
                endpoint: self.set_endpoints[index].to_string(),
                state: drive_state.to_string(),
            });
            result.after.drives.push(HealDriveInfo {
                uuid: "".to_string(),
                endpoint: self.set_endpoints[index].to_string(),
                state: drive_state.to_string(),
            });
        }
        result
    }

    async fn delete_if_dang_ling(
        &self,
        bucket: &str,
        object: &str,
        meta_arr: &[FileInfo],
        errs: &[Option<DiskError>],
        data_errs_by_part: &HashMap<usize, Vec<usize>>,
        opts: ObjectOptions,
    ) -> disk::error::Result<FileInfo> {
        if let Ok(m) = is_object_dang_ling(meta_arr, errs, data_errs_by_part) {
            let mut tags = HashMap::new();
            tags.insert("set", self.set_index.to_string());
            tags.insert("pool", self.pool_index.to_string());
            tags.insert("merrs", join_errs(errs));
            tags.insert("derrs", format!("{:?}", data_errs_by_part));
            if m.is_valid() {
                tags.insert("sz", m.size.to_string());
                tags.insert(
                    "mt",
                    m.mod_time
                        .as_ref()
                        .map_or(String::new(), |mod_time| mod_time.unix_timestamp().to_string()),
                );
                tags.insert("d:p", format!("{}:{}", m.erasure.data_blocks, m.erasure.parity_blocks));
            } else {
                tags.insert("invalid", "1".to_string());
                tags.insert(
                    "d:p",
                    format!("{}:{}", self.set_drive_count - self.default_parity_count, self.default_parity_count),
                );
            }
            let mut offline = 0;
            for (i, err) in errs.iter().enumerate() {
                let mut found = false;
                if let Some(err) = err {
                    if err == &DiskError::DiskNotFound {
                        found = true;
                    }
                }
                for p in data_errs_by_part {
                    if let Some(v) = p.1.get(i) {
                        if *v == CHECK_PART_DISK_NOT_FOUND {
                            found = true;
                            break;
                        }
                    }
                }

                if found {
                    offline += 1;
                }
            }

            if offline > 0 {
                tags.insert("offline", offline.to_string());
            }

            // TODO: audit
            let mut fi = FileInfo::default();
            if let Some(ref version_id) = opts.version_id {
                fi.version_id = Uuid::parse_str(version_id).ok();
            }
            // TODO: tier
            for disk in self.disks.read().await.iter().flatten() {
                let _ = disk
                    .delete_version(bucket, object, fi.clone(), false, DeleteOptions::default())
                    .await;
            }
            Ok(m)
        } else {
            error!("delete_if_dang_ling: is_object_dang_ling errs={:?}", errs);
            Err(DiskError::ErasureReadQuorum)
        }
    }

    pub async fn ns_scanner(
        self: Arc<Self>,
        buckets: &[BucketInfo],
        want_cycle: u32,
        updates: Sender<DataUsageCache>,
        heal_scan_mode: HealScanMode,
    ) -> Result<()> {
        info!("ns_scanner");
        if buckets.is_empty() {
            info!("data-scanner: no buckets to scan, skipping scanner cycle");
            return Ok(());
        }

        let (mut disks, healing) = self.get_online_disk_with_healing(false).await?;
        if disks.is_empty() {
            info!("data-scanner: all drives are offline or being healed, skipping scanner cycle");
            return Ok(());
        }

        let old_cache = DataUsageCache::load(&self, DATA_USAGE_CACHE_NAME).await?;
        let mut cache = DataUsageCache {
            info: DataUsageCacheInfo {
                name: DATA_USAGE_ROOT.to_string(),
                next_cycle: old_cache.info.next_cycle,
                ..Default::default()
            },
            cache: HashMap::new(),
        };

        // Put all buckets into channel.
        let (bucket_tx, bucket_rx) = mpsc::channel(buckets.len());
        // Shuffle buckets to ensure total randomness of buckets, being scanned.
        // Otherwise, same set of buckets get scanned across erasure sets always.
        // at any given point in time. This allows different buckets to be scanned
        // in different order per erasure set, this wider spread is needed when
        // there are lots of buckets with different order of objects in them.
        let permutes = {
            let mut rng = rand::rng();
            let mut permutes: Vec<usize> = (0..buckets.len()).collect();
            permutes.shuffle(&mut rng);
            permutes
        };

        // Add new buckets first
        for idx in permutes.iter() {
            let b = buckets[*idx].clone();
            match old_cache.find(&b.name) {
                Some(e) => {
                    cache.replace(&b.name, DATA_USAGE_ROOT, e);
                    let _ = bucket_tx.send(b).await;
                }
                None => {
                    let _ = bucket_tx.send(b).await;
                }
            }
        }

        let (buckets_results_tx, mut buckets_results_rx) = mpsc::channel::<DataUsageEntryInfo>(disks.len());
        // 新增：从环境变量读取基础间隔，默认 30 秒
        let set_disk_update_interval_secs = std::env::var("RUSTFS_NS_SCANNER_INTERVAL")
            .ok()
            .and_then(|v| v.parse::<u64>().ok())
            .unwrap_or(30);
        let update_time = {
            let mut rng = rand::rng();
            Duration::from_secs(set_disk_update_interval_secs) + Duration::from_secs_f64(10.0 * rng.random_range(0.0..1.0))
        };
        let mut ticker = interval(update_time);

        // 检查是否需要运行后台任务
        let skip_background_task = std::env::var("RUSTFS_SKIP_BACKGROUND_TASK")
            .ok()
            .and_then(|v| v.parse::<bool>().ok())
            .unwrap_or(false);

        let task = if !skip_background_task {
            Some(tokio::spawn(async move {
                let last_save = Some(SystemTime::now());
                let mut need_loop = true;
                while need_loop {
                    select! {
                        _ = ticker.tick() => {
                            if !cache.info.last_update.eq(&last_save) {
                                let _ = cache.save(DATA_USAGE_CACHE_NAME).await;
                                let _ = updates.send(cache.clone()).await;
                            }
                        }
                        result = buckets_results_rx.recv() => {
                            match result {
                                Some(result) => {
                                    cache.replace(&result.name, &result.parent, result.entry);
                                    cache.info.last_update = Some(SystemTime::now());
                                },
                                None => {
                                    need_loop = false;
                                    cache.info.next_cycle = want_cycle;
                                    cache.info.last_update = Some(SystemTime::now());
                                    let _ = cache.save(DATA_USAGE_CACHE_NAME).await;
                                    let _ = updates.send(cache.clone()).await;
                                }
                            }
                        }
                    }
                }
            }))
        } else {
            None
        };

        // Restrict parallelism for disk usage scanner
        let max_procs = num_cpus::get();
        if max_procs < disks.len() {
            disks = disks[0..max_procs].to_vec();
        }

        let mut futures = Vec::new();
        let bucket_rx = Arc::new(RwLock::new(bucket_rx));
        for disk in disks.iter() {
            let disk = match disk {
                Some(disk) => disk.clone(),
                None => continue,
            };
            let self_clone = Arc::clone(&self);
            let bucket_rx_clone = bucket_rx.clone();
            let buckets_results_tx_clone = buckets_results_tx.clone();
            futures.push(async move {
                loop {
                    match bucket_rx_clone.write().await.try_recv() {
                        Err(_) => return,
                        Ok(bucket_info) => {
                            let cache_name = Path::new(&bucket_info.name).join(DATA_USAGE_CACHE_NAME);
                            let mut cache = match DataUsageCache::load(&self_clone, &cache_name.to_string_lossy()).await {
                                Ok(cache) => cache,
                                Err(_) => continue,
                            };
                            if cache.info.name.is_empty() {
                                cache.info.name = bucket_info.name.clone();
                            }
                            cache.info.skip_healing = healing;
                            cache.info.next_cycle = want_cycle;
                            if cache.info.name != bucket_info.name {
                                cache.info = DataUsageCacheInfo {
                                    name: bucket_info.name,
                                    last_update: Some(SystemTime::now()),
                                    next_cycle: want_cycle,
                                    ..Default::default()
                                };
                            }

                            // Collect updates.
                            let (tx, mut rx) = mpsc::channel(1);
                            let buckets_results_tx_inner_clone = buckets_results_tx_clone.clone();
                            let name = cache.info.name.clone();
                            let task = tokio::spawn(async move {
                                loop {
                                    match rx.recv().await {
                                        Some(entry) => {
                                            let _ = buckets_results_tx_inner_clone
                                                .send(DataUsageEntryInfo {
                                                    name: name.clone(),
                                                    parent: DATA_USAGE_ROOT.to_string(),
                                                    entry,
                                                })
                                                .await;
                                        }
                                        None => return,
                                    }
                                }
                            });

                            // Calc usage
                            let before = cache.info.last_update;
                            let mut cache = match disk.ns_scanner(&cache, tx, heal_scan_mode, None).await {
                                Ok(cache) => cache,
                                Err(_) => {
                                    if cache.info.last_update > before {
                                        let _ = cache.save(&cache_name.to_string_lossy()).await;
                                    }
                                    let _ = task.await;
                                    continue;
                                }
                            };

                            cache.info.updates = None;
                            let _ = task.await;
                            let mut root = DataUsageEntry::default();
                            if let Some(r) = cache.root() {
                                root = cache.flatten(&r);
                                if let Some(r) = &root.replication_stats {
                                    if r.empty() {
                                        root.replication_stats = None;
                                    }
                                }
                            }
                            let _ = buckets_results_tx_clone
                                .send(DataUsageEntryInfo {
                                    name: cache.info.name.clone(),
                                    parent: DATA_USAGE_ROOT.to_string(),
                                    entry: root,
                                })
                                .await;
                            let _ = cache.save(&cache_name.to_string_lossy()).await;
                        }
                    }
                    info!("continue scanner");
                }
            });
        }

        info!("ns_scanner start");
        let _ = join_all(futures).await;
        if let Some(task) = task {
            let _ = task.await;
        }
        info!("ns_scanner completed");
        Ok(())
    }

    pub async fn heal_erasure_set(self: Arc<Self>, buckets: &[String], tracker: Arc<RwLock<HealingTracker>>) -> Result<()> {
        let (bg_seq, found) = GLOBAL_BackgroundHealState.get_heal_sequence_by_token(BG_HEALING_UUID).await;
        if !found {
            return Err(Error::other("no local healing sequence initialized, unable to heal the drive"));
        }
        let bg_seq = bg_seq.unwrap();
        let scan_mode = HEAL_NORMAL_SCAN;

        let tracker_defer = tracker.clone();
        let defer = async move {
            let mut w = tracker_defer.write().await;
            w.set_object("").await;
            w.set_bucket("").await;
            let _ = w.update().await;
        };

        for bucket in buckets.iter() {
            if let Err(err) = HealSequence::heal_bucket(bg_seq.clone(), bucket, true).await {
                info!("{}", err.to_string());
            }
        }

        let info = match tracker
            .read()
            .await
            .disk
            .as_ref()
            .unwrap()
            .disk_info(&DiskInfoOptions::default())
            .await
        {
            Ok(info) => info,
            Err(err) => {
                defer.await;
                return Err(Error::other(format!("unable to get disk information before healing it: {}", err)));
            }
        };
        let num_cores = num_cpus::get(); // 使用 num_cpus crate 获取核心数
        let mut num_healers: usize;

        if info.nr_requests as usize > num_cores {
            num_healers = num_cores / 4;
        } else {
            num_healers = (info.nr_requests / 4) as usize;
        }

        if num_healers < 4 {
            num_healers = 4;
        }

        let v = globalHealConfig.read().await.get_workers();
        if v > 0 {
            num_healers = v;
        }
        info!(
            "Healing drive '{}' - use {} parallel workers.",
            tracker.read().await.disk.as_ref().unwrap().to_string(),
            num_healers
        );

        let jt = Workers::new(num_healers).map_err(|err| Error::other(err.to_string()))?;

        let heal_entry_done = |name: String| HealEntryResult {
            entry_done: true,
            name,
            ..Default::default()
        };

        let heal_entry_success = |sz: usize| HealEntryResult {
            bytes: sz,
            success: true,
            ..Default::default()
        };

        let heal_entry_failure = |sz: usize| HealEntryResult {
            bytes: sz,
            ..Default::default()
        };

        let heal_entry_skipped = |sz: usize| HealEntryResult {
            bytes: sz,
            skipped: true,
            ..Default::default()
        };

        let (result_tx, mut result_rx) = mpsc::channel::<HealEntryResult>(1000);
        let tracker_task = tracker.clone();
        let task = tokio::spawn(async move {
            loop {
                match result_rx.recv().await {
                    Some(entry) => {
                        if entry.entry_done {
                            tracker_task.write().await.set_object(entry.name.as_str()).await;
                            if let Some(last_update) = tracker_task.read().await.get_last_update().await {
                                if SystemTime::now().duration_since(last_update).unwrap() > Duration::from_secs(60) {
                                    if let Err(err) = tracker_task.write().await.update().await {
                                        info!("tracker update failed, err: {}", err.to_string());
                                    }
                                }
                            }
                            continue;
                        }

                        tracker_task
                            .write()
                            .await
                            .update_progress(entry.success, entry.skipped, entry.bytes as u64)
                            .await;
                    }
                    None => {
                        if let Err(err) = tracker_task.write().await.update().await {
                            info!("tracker update failed, err: {}", err.to_string());
                        }
                        return;
                    }
                }
            }
        });

        let started = tracker.read().await.started;
        let mut ret_err = None;
        for bucket in buckets.iter() {
            if tracker.read().await.is_healed(bucket).await {
                info!("bucket{} was healed", bucket);
                continue;
            }

            let mut forward_to = None;
            let b = tracker.read().await.get_bucket().await;
            if b == *bucket {
                forward_to = Some(tracker.read().await.get_object().await);
            }

            if !b.is_empty() {
                tracker.write().await.resume().await;
            }

            tracker.write().await.set_object("").await;
            tracker.write().await.set_bucket("").await;

            if let Err(err) = HealSequence::heal_bucket(bg_seq.clone(), bucket, true).await {
                info!("heal bucket failed: {}", err.to_string());
                ret_err = Some(err);
                continue;
            }

            // let vc: VersioningConfiguration;
            // let lc: BucketLifecycleConfiguration;
            // let lr: ObjectLockConfiguration;
            // let rcfg: ReplicationConfiguration;
            // if !is_rustfs_meta_bucket_name(bucket) {
            //     vc = match get_versioning_config(bucket).await {
            //         Ok((r, _)) => r,
            //         Err(err) => {
            //             ret_err = Some(err);
            //             info!("get versioning config failed, err: {}", err.to_string());
            //             continue;
            //         }
            //     };
            //     lc = match get_lifecycle_config(bucket).await {
            //         Ok((r, _)) => r,
            //         Err(err) => {
            //             ret_err = Some(err);
            //             info!("get lifecycle config failed, err: {}", err.to_string());
            //             continue;
            //         }
            //     };
            //     lr = match get_object_lock_config(bucket).await {
            //         Ok((r, _)) => r,
            //         Err(err) => {
            //             ret_err = Some(err);
            //             info!("get object lock config failed, err: {}", err.to_string());
            //             continue;
            //         }
            //     };
            //     rcfg = match get_replication_config(bucket).await {
            //         Ok((r, _)) => r,
            //         Err(err) => {
            //             ret_err = Some(err);
            //             info!("get replication config failed, err: {}", err.to_string());
            //             continue;
            //         }
            //     };
            // }
            let (mut disks, _, healing) = self.get_online_disk_with_healing_and_info(true).await?;
            if disks.len() == healing {
                info!("all drives are in healing state, aborting..");
                defer.await;
                return Ok(());
            }

            disks = disks[0..disks.len() - healing].to_vec();
            if disks.len() < self.set_drive_count / 2 {
                defer.await;
                return Err(Error::other(format!(
                    "not enough drives (found={}, healing={}, total={}) are available to heal `{}`",
                    disks.len(),
                    healing,
                    self.set_drive_count,
                    tracker.read().await.disk.as_ref().unwrap().to_string()
                )));
            }

            {
                let mut rng = rand::rng();

                // 随机洗牌
                disks.shuffle(&mut rng);
            }

            let expected_disk = disks.len() / 2 + 1;
            let fallback_disks = disks[expected_disk..].to_vec();
            disks = disks[..expected_disk].to_vec();

            //todo
            // let filter_life_cycle = |bucket: &str, object: &str, fi: FileInfo| {
            //     if lc.rules.is_empty() {
            //         return false;
            //     }
            //     // todo: versioning
            //     let versioned = false;
            //     let obj_info = fi.to_object_info(bucket, object, versioned);
            //
            // };

            let result_tx_send = result_tx.clone();
            let bg_seq_send = bg_seq.clone();
            let send = Box::new(move |result: HealEntryResult| {
                let result_tx_send = result_tx_send.clone();
                let bg_seq_send = bg_seq_send.clone();
                Box::pin(async move {
                    let _ = result_tx_send.send(result).await;
                    bg_seq_send.count_scanned(HEAL_ITEM_OBJECT.to_string()).await;
                    true
                })
            });

            let jt_clone = jt.clone();
            let self_clone = self.clone();
            let started_clone = started;
            let tracker_heal = tracker.clone();
            let bg_seq_clone = bg_seq.clone();
            let send_clone = send.clone();
            let heal_entry = Arc::new(move |bucket: String, entry: MetaCacheEntry| {
                info!("heal entry, bucket: {}, entry: {:?}", bucket, entry);
                let jt_clone = jt_clone.clone();
                let self_clone = self_clone.clone();
                let started = started_clone;
                let tracker_heal = tracker_heal.clone();
                let bg_seq = bg_seq_clone.clone();
                let send = send_clone.clone();
                Box::pin(async move {
                    let defer = async {
                        jt_clone.give().await;
                    };
                    if entry.name.is_empty() && entry.metadata.is_empty() {
                        defer.await;
                        return;
                    }
                    if entry.is_dir() {
                        defer.await;
                        return;
                    }
                    if bucket == RUSTFS_META_BUCKET
                        && (Pattern::new("buckets/*/.metacache/*")
                            .map(|p| p.matches(&entry.name))
                            .unwrap_or(false)
                            || Pattern::new("tmp/.trash/*").map(|p| p.matches(&entry.name)).unwrap_or(false)
                            || Pattern::new("multipart/*").map(|p| p.matches(&entry.name)).unwrap_or(false))
                    {
                        defer.await;
                        return;
                    }
                    let encoded_entry_name = encode_dir_object(entry.name.as_str());
                    let mut result: HealEntryResult;
                    let fivs = match entry.file_info_versions(bucket.as_str()) {
                        Ok(fivs) => fivs,
                        Err(err) => {
                            match self_clone
                                .heal_object(
                                    &bucket,
                                    &encoded_entry_name,
                                    "",
                                    &HealOpts {
                                        scan_mode,
                                        remove: HEAL_DELETE_DANGLING,
                                        ..Default::default()
                                    },
                                )
                                .await
                            {
                                Ok((res, None)) => {
                                    bg_seq.count_healed(HEAL_ITEM_OBJECT.to_string()).await;
                                    result = heal_entry_success(res.object_size);
                                }
                                Ok((_, Some(err))) => {
                                    if DiskError::is_err_object_not_found(&err) || DiskError::is_err_version_not_found(&err) {
                                        defer.await;
                                        return;
                                    }

                                    result = heal_entry_failure(0);
                                    bg_seq.count_failed(HEAL_ITEM_OBJECT.to_string()).await;
                                    info!("unable to heal object {}/{}: {}", bucket, entry.name, err.to_string());
                                }
                                Err(_) => {
                                    result = heal_entry_failure(0);
                                    bg_seq.count_failed(HEAL_ITEM_OBJECT.to_string()).await;
                                    info!("unable to heal object {}/{}: {}", bucket, entry.name, err.to_string());
                                }
                            }
                            send(result.clone()).await;
                            defer.await;
                            return;
                        }
                    };
                    let mut version_not_found = 0;
                    for version in fivs.versions.iter() {
                        if let (Some(started), Some(mod_time)) = (started, version.mod_time) {
                            if mod_time > started {
                                version_not_found += 1;
                                if send(heal_entry_skipped(version.size as usize)).await {
                                    defer.await;
                                    return;
                                }
                                continue;
                            }
                        }

                        let mut version_healed = false;
                        match self_clone
                            .heal_object(
                                &bucket,
                                &encoded_entry_name,
                                version
                                    .version_id
                                    .as_ref()
                                    .map(|v| v.to_string())
                                    .unwrap_or("".to_string())
                                    .as_str(),
                                &HealOpts {
                                    scan_mode,
                                    remove: HEAL_DELETE_DANGLING,
                                    ..Default::default()
                                },
                            )
                            .await
                        {
                            Ok((res, None)) => {
                                if res.after.drives[tracker_heal.read().await.disk_index.unwrap()].state == DRIVE_STATE_OK {
                                    version_healed = true;
                                }
                            }
                            Ok((_, Some(err))) => match err {
                                DiskError::FileNotFound | DiskError::FileVersionNotFound => {
                                    version_not_found += 1;
                                    continue;
                                }
                                _ => {}
                            },
                            Err(_) => {}
                        }

                        if version_healed {
                            bg_seq.count_healed(HEAL_ITEM_OBJECT.to_string()).await;
                            result = heal_entry_success(version.size as usize);
                        } else {
                            bg_seq.count_failed(HEAL_ITEM_OBJECT.to_string()).await;
                            result = heal_entry_failure(version.size as usize);
                            match version.version_id {
                                Some(version_id) => {
                                    info!("unable to heal object {}/{}-v({})", bucket, version.name, version_id);
                                }
                                None => {
                                    info!("unable to heal object {}/{}", bucket, version.name);
                                }
                            }
                        }

                        if !send(result).await {
                            defer.await;
                            return;
                        }
                    }
                    if version_not_found == fivs.versions.len() {
                        defer.await;
                        return;
                    }
                    send(heal_entry_done(entry.name.clone())).await;
                    defer.await;
                })
            });
            let resolver = MetadataResolutionParams {
                dir_quorum: 1,
                obj_quorum: 1,
                bucket: bucket.clone(),
                ..Default::default()
            };
            let (_, rx) = broadcast::channel(1);
            let jt_agree = jt.clone();
            let jt_partial = jt.clone();
            let bucket_agree = bucket.clone();
            let bucket_partial = bucket.clone();
            let heal_entry_agree = heal_entry.clone();
            let heal_entry_partial = heal_entry.clone();
            if let Err(err) = list_path_raw(
                rx,
                ListPathRawOptions {
                    disks,
                    fallback_disks,
                    bucket: bucket.clone(),
                    recursice: true,
                    forward_to,
                    min_disks: 1,
                    report_not_found: false,
                    agreed: Some(Box::new(move |entry: MetaCacheEntry| {
                        let jt = jt_agree.clone();
                        let bucket = bucket_agree.clone();
                        let heal_entry = heal_entry_agree.clone();
                        Box::pin(async move {
                            jt.take().await;
                            let bucket = bucket.clone();
                            tokio::spawn(async move {
                                heal_entry(bucket, entry).await;
                            });
                        })
                    })),
                    partial: Some(Box::new(move |entries: MetaCacheEntries, _: &[Option<DiskError>]| {
                        let jt = jt_partial.clone();
                        let bucket = bucket_partial.clone();
                        let heal_entry = heal_entry_partial.clone();
                        Box::pin({
                            let heal_entry = heal_entry.clone();
                            let resolver = resolver.clone();
                            async move {
                                let entry = if let Some(entry) = entries.resolve(resolver) {
                                    entry
                                } else if let (Some(entry), _) = entries.first_found() {
                                    entry
                                } else {
                                    return;
                                };
                                jt.take().await;
                                let bucket = bucket.clone();
                                let heal_entry = heal_entry.clone();
                                tokio::spawn(async move {
                                    heal_entry(bucket, entry).await;
                                });
                            }
                        })
                    })),
                    finished: None,
                    ..Default::default()
                },
            )
            .await
            {
                ret_err = Some(err.into());
            }

            jt.wait().await;
            if let Some(err) = ret_err.as_ref() {
                info!("listing failed with: {} on bucket: {}", err.to_string(), bucket);
                continue;
            }
            tracker.write().await.bucket_done(bucket).await;
            if let Err(err) = tracker.write().await.update().await {
                info!("tracker update failed, err: {}", err.to_string());
            }
        }

        if let Some(err) = ret_err.as_ref() {
            return Err(err.clone());
        }
        if !tracker.read().await.queue_buckets.is_empty() {
            return Err(Error::other(format!(
                "not all buckets were healed: {:?}",
                tracker.read().await.queue_buckets
            )));
        }
        drop(result_tx);
        let _ = task.await;
        defer.await;
        Ok(())
    }

    async fn delete_prefix(&self, bucket: &str, prefix: &str) -> disk::error::Result<()> {
        let disks = self.get_disks_internal().await;
        let write_quorum = disks.len() / 2 + 1;

        let mut futures = Vec::with_capacity(disks.len());

        for disk_op in disks.iter() {
            let bucket = bucket.to_string();
            let prefix = prefix.to_string();
            futures.push(async move {
                if let Some(disk) = disk_op {
                    disk.delete(
                        &bucket,
                        &prefix,
                        DeleteOptions {
                            recursive: true,
                            immediate: true,
                            ..Default::default()
                        },
                    )
                    .await
                } else {
                    Ok(())
                }
            });
        }

        let errs = join_all(futures).await.into_iter().map(|v| v.err()).collect::<Vec<_>>();

        if let Some(err) = reduce_write_quorum_errs(&errs, OBJECT_OP_IGNORED_ERRS, write_quorum) {
            return Err(err);
        }

        Ok(())
    }
}

#[async_trait::async_trait]
impl ObjectIO for SetDisks {
    #[tracing::instrument(level = "debug", skip(self))]
    async fn get_object_reader(
        &self,
        bucket: &str,
        object: &str,
        range: Option<HTTPRangeSpec>,
        h: HeaderMap,
        opts: &ObjectOptions,
    ) -> Result<GetObjectReader> {
        let (fi, files, disks) = self
            .get_object_fileinfo(bucket, object, opts, true)
            .await
            .map_err(|err| to_object_err(err, vec![bucket, object]))?;
        let object_info = ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended);

        if object_info.delete_marker {
            if opts.version_id.is_none() {
                return Err(to_object_err(Error::FileNotFound, vec![bucket, object]));
            }
            return Err(to_object_err(Error::MethodNotAllowed, vec![bucket, object]));
        }

        // if object_info.size == 0 {
        //     let empty_rd: Box<dyn AsyncRead> = Box::new(Bytes::new());

        //     return Ok(GetObjectReader {
        //         stream: empty_rd,
        //         object_info,
        //     });
        // }

        if object_info.size == 0 {
            if let Some(rs) = range {
                let _ = rs.get_offset_length(object_info.size)?;
            }

            let reader = GetObjectReader {
                stream: Box::new(Cursor::new(Vec::new())),
                object_info,
            };
            return Ok(reader);
        }

        // TODO: remote

        let (rd, wd) = tokio::io::duplex(DEFAULT_READ_BUFFER_SIZE);

        let (reader, offset, length) = GetObjectReader::new(Box::new(rd), range, &object_info, opts, &h)?;

        // let disks = disks.clone();
        let bucket = bucket.to_owned();
        let object = object.to_owned();
        let set_index = self.set_index;
        let pool_index = self.pool_index;
        tokio::spawn(async move {
            if let Err(e) = Self::get_object_with_fileinfo(
                &bucket,
                &object,
                offset,
                length,
                &mut Box::new(wd),
                fi,
                files,
                &disks,
                set_index,
                pool_index,
            )
            .await
            {
                error!("get_object_with_fileinfo err {:?}", e);
            };

            // error!("get_object_with_fileinfo end {}/{}", bucket, object);
        });

        Ok(reader)
    }

    #[tracing::instrument(level = "debug", skip(self, data,))]
    async fn put_object(&self, bucket: &str, object: &str, data: &mut PutObjReader, opts: &ObjectOptions) -> Result<ObjectInfo> {
        let disks = self.disks.read().await;

        // let mut _ns = None;
        // if !opts.no_lock {
        //     let paths = vec![object.to_string()];
        //     let ns_lock = new_nslock(
        //         Arc::clone(&self.ns_mutex),
        //         self.locker_owner.clone(),
        //         bucket.to_string(),
        //         paths,
        //         self.lockers.clone(),
        //     )
        //     .await;
        //     if !ns_lock
        //         .0
        //         .write()
        //         .await
        //         .get_lock(&Options {
        //             timeout: Duration::from_secs(5),
        //             retry_interval: Duration::from_secs(1),
        //         })
        //         .await
        //         .map_err(|err| Error::other(err.to_string()))?
        //     {
        //         return Err(Error::other("can not get lock. please retry".to_string()));
        //     }

        //     _ns = Some(ns_lock);
        // }

        let mut user_defined = opts.user_defined.clone().unwrap_or_default();

        let sc_parity_drives = {
            if let Some(sc) = GLOBAL_StorageClass.get() {
                sc.get_parity_for_sc(user_defined.get(AMZ_STORAGE_CLASS).cloned().unwrap_or_default().as_str())
            } else {
                None
            }
        };

        let mut parity_drives = sc_parity_drives.unwrap_or(self.default_parity_count);
        if opts.max_parity {
            parity_drives = disks.len() / 2;
        }

        let data_drives = disks.len() - parity_drives;
        let mut write_quorum = data_drives;
        if data_drives == parity_drives {
            write_quorum += 1
        }

        let mut fi = FileInfo::new([bucket, object].join("/").as_str(), data_drives, parity_drives);

        fi.version_id = {
            if let Some(ref vid) = opts.version_id {
                Some(Uuid::parse_str(vid.as_str()).map_err(Error::other)?)
            } else {
                None
            }
        };

        if opts.versioned && fi.version_id.is_none() {
            fi.version_id = Some(Uuid::new_v4());
        }

        fi.data_dir = Some(Uuid::new_v4());

        let parts_metadata = vec![fi.clone(); disks.len()];

        let (shuffle_disks, mut parts_metadatas) = Self::shuffle_disks_and_parts_metadata(&disks, &parts_metadata, &fi);

        let tmp_dir = Uuid::new_v4().to_string();

        let tmp_object = format!("{}/{}/part.1", tmp_dir, fi.data_dir.unwrap());

        let erasure = erasure_coding::Erasure::new(fi.erasure.data_blocks, fi.erasure.parity_blocks, fi.erasure.block_size);

        let is_inline_buffer = {
            if let Some(sc) = GLOBAL_StorageClass.get() {
                sc.should_inline(erasure.shard_file_size(data.size()), opts.versioned)
            } else {
                false
            }
        };

        let mut writers = Vec::with_capacity(shuffle_disks.len());
        let mut errors = Vec::with_capacity(shuffle_disks.len());
        for disk_op in shuffle_disks.iter() {
            if let Some(disk) = disk_op {
                let writer = create_bitrot_writer(
                    is_inline_buffer,
                    Some(disk),
                    RUSTFS_META_TMP_BUCKET,
                    &tmp_object,
                    erasure.shard_file_size(data.size()),
                    erasure.shard_size(),
                    HashAlgorithm::HighwayHash256,
                )
                .await?;

                // let writer = if is_inline_buffer {
                //     BitrotWriter::new(
                //         Writer::from_cursor(Cursor::new(Vec::new())),
                //         erasure.shard_size(),
                //         HashAlgorithm::HighwayHash256,
                //     )
                // } else {
                //     let f = match disk
                //         .create_file("", RUSTFS_META_TMP_BUCKET, &tmp_object, erasure.shard_file_size(data.content_length))
                //         .await
                //     {
                //         Ok(f) => f,
                //         Err(e) => {
                //             errors.push(Some(e));
                //             writers.push(None);
                //             continue;
                //         }
                //     };

                //     BitrotWriter::new(Writer::from_tokio_writer(f), erasure.shard_size(), HashAlgorithm::HighwayHash256)
                // };

                writers.push(Some(writer));
                errors.push(None);
            } else {
                errors.push(Some(DiskError::DiskNotFound));
                writers.push(None);
            }
        }

        let nil_count = errors.iter().filter(|&e| e.is_none()).count();
        if nil_count < write_quorum {
            error!("not enough disks to write: {:?}", errors);
            if let Some(write_err) = reduce_write_quorum_errs(&errors, OBJECT_OP_IGNORED_ERRS, write_quorum) {
                return Err(to_object_err(write_err.into(), vec![bucket, object]));
            }

            return Err(Error::other(format!("not enough disks to write: {:?}", errors)));
        }

        let stream = mem::replace(
            &mut data.stream,
            HashReader::new(Box::new(WarpReader::new(Cursor::new(Vec::new()))), 0, 0, None, false)?,
        );

        let (reader, w_size) = match Arc::new(erasure).encode(stream, &mut writers, write_quorum).await {
            Ok((r, w)) => (r, w),
            Err(e) => {
                error!("encode err {:?}", e);
                return Err(e.into());
            }
        }; // TODO: 出错，删除临时目录

        let _ = mem::replace(&mut data.stream, reader);
        // if let Err(err) = close_bitrot_writers(&mut writers).await {
        //     error!("close_bitrot_writers err {:?}", err);
        // }

        if (w_size as i64) < data.size() {
            return Err(Error::other("put_object write size < data.size()"));
        }

        if user_defined.contains_key(&format!("{}compression", RESERVED_METADATA_PREFIX_LOWER)) {
            user_defined.insert(format!("{}compression-size", RESERVED_METADATA_PREFIX_LOWER), w_size.to_string());
        }

        let index_op = data.stream.try_get_index().map(|v| v.clone().into_vec());

        //TODO: userDefined

        let etag = data.stream.try_resolve_etag().unwrap_or_default();

        user_defined.insert("etag".to_owned(), etag.clone());

        if !user_defined.contains_key("content-type") {
            //  get content-type
        }

        let mut actual_size = data.actual_size();
        if actual_size < 0 {
            let is_compressed = fi.is_compressed();
            if !is_compressed {
                actual_size = w_size as i64;
            }
        }

        if let Some(sc) = user_defined.get(AMZ_STORAGE_CLASS) {
            if sc == storageclass::STANDARD {
                let _ = user_defined.remove(AMZ_STORAGE_CLASS);
            }
        }

        let now = OffsetDateTime::now_utc();

        for (i, fi) in parts_metadatas.iter_mut().enumerate() {
            if is_inline_buffer {
                if let Some(writer) = writers[i].take() {
                    fi.data = Some(writer.into_inline_data().map(bytes::Bytes::from).unwrap_or_default());
                }

                fi.set_inline_data();
            }

            fi.metadata = user_defined.clone();
            fi.mod_time = Some(now);
            fi.size = w_size as i64;
            fi.versioned = opts.versioned || opts.version_suspended;
            fi.add_object_part(1, etag.clone(), w_size, fi.mod_time, actual_size, index_op.clone());

            if opts.data_movement {
                fi.set_data_moved();
            }
        }

        let (online_disks, _, op_old_dir) = Self::rename_data(
            &shuffle_disks,
            RUSTFS_META_TMP_BUCKET,
            tmp_dir.as_str(),
            &parts_metadatas,
            bucket,
            object,
            write_quorum,
        )
        .await?;

        if let Some(old_dir) = op_old_dir {
            self.commit_rename_data_dir(&shuffle_disks, bucket, object, &old_dir.to_string(), write_quorum)
                .await?;
        }

        self.delete_all(RUSTFS_META_TMP_BUCKET, &tmp_dir).await?;

        // if let Some(mut locker) = ns {
        //     locker.un_lock().await.map_err(|err| Error::other(err.to_string()))?;
        // }

        for (i, op_disk) in online_disks.iter().enumerate() {
            if let Some(disk) = op_disk {
                if disk.is_online().await {
                    fi = parts_metadatas[i].clone();
                    break;
                }
            }
        }

        fi.is_latest = true;

        // TODO: version suport
        Ok(ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended))
    }
}

#[async_trait::async_trait]
impl StorageAPI for SetDisks {
    #[tracing::instrument(skip(self))]
    async fn backend_info(&self) -> madmin::BackendInfo {
        unimplemented!()
    }
    #[tracing::instrument(skip(self))]
    async fn storage_info(&self) -> madmin::StorageInfo {
        let disks = self.get_disks_internal().await;

        get_storage_info(&disks, &self.set_endpoints).await
    }
    #[tracing::instrument(skip(self))]
    async fn local_storage_info(&self) -> madmin::StorageInfo {
        let disks = self.get_disks_internal().await;

        let mut local_disks: Vec<Option<Arc<disk::Disk>>> = Vec::new();
        let mut local_endpoints = Vec::new();

        for (i, ep) in self.set_endpoints.iter().enumerate() {
            if ep.is_local {
                local_disks.push(disks[i].clone());
                local_endpoints.push(ep.clone());
            }
        }

        get_storage_info(&local_disks, &local_endpoints).await
    }
    #[tracing::instrument(skip(self))]
    async fn list_bucket(&self, _opts: &BucketOptions) -> Result<Vec<BucketInfo>> {
        unimplemented!()
    }
    #[tracing::instrument(skip(self))]
    async fn make_bucket(&self, _bucket: &str, _opts: &MakeBucketOptions) -> Result<()> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn get_bucket_info(&self, _bucket: &str, _opts: &BucketOptions) -> Result<BucketInfo> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn copy_object(
        &self,
        src_bucket: &str,
        src_object: &str,
        _dst_bucket: &str,
        _dst_object: &str,
        src_info: &mut ObjectInfo,
        src_opts: &ObjectOptions,
        dst_opts: &ObjectOptions,
    ) -> Result<ObjectInfo> {
        // FIXME: TODO:

        if !src_info.metadata_only {
            return Err(StorageError::NotImplemented);
        }

        let disks = self.get_disks_internal().await;

        let (mut metas, errs) = {
            if let Some(vid) = &src_opts.version_id {
                Self::read_all_fileinfo(&disks, "", src_bucket, src_object, vid, true, false).await?
            } else {
                Self::read_all_xl(&disks, src_bucket, src_object, true, false).await
            }
        };

        let (read_quorum, write_quorum) = match Self::object_quorum_from_meta(&metas, &errs, self.default_parity_count) {
            Ok((r, w)) => (r as usize, w as usize),
            Err(mut err) => {
                if err == DiskError::ErasureReadQuorum
                    && !src_bucket.starts_with(RUSTFS_META_BUCKET)
                    && self
                        .delete_if_dang_ling(src_bucket, src_object, &metas, &errs, &HashMap::new(), src_opts.clone())
                        .await
                        .is_ok()
                {
                    if src_opts.version_id.is_some() {
                        err = DiskError::FileVersionNotFound
                    } else {
                        err = DiskError::FileNotFound
                    }
                }
                return Err(to_object_err(err.into(), vec![src_bucket, src_object]));
            }
        };

        let (online_disks, mod_time, etag) = Self::list_online_disks(&disks, &metas, &errs, read_quorum);

        let mut fi = Self::pick_valid_fileinfo(&metas, mod_time, etag, read_quorum)
            .map_err(|e| to_object_err(e.into(), vec![src_bucket, src_object]))?;

        if fi.deleted {
            if src_opts.version_id.is_none() {
                return Err(to_object_err(Error::FileNotFound, vec![src_bucket, src_object]));
            }
            return Err(to_object_err(Error::MethodNotAllowed, vec![src_bucket, src_object]));
        }

        let version_id = {
            if src_info.version_only {
                if let Some(vid) = &dst_opts.version_id {
                    Some(Uuid::parse_str(vid)?)
                } else {
                    Some(Uuid::new_v4())
                }
            } else {
                src_info.version_id
            }
        };

        let inline_data = fi.inline_data();
        fi.metadata = src_info.user_defined.as_ref().cloned().unwrap_or_default();

        if let Some(ud) = src_info.user_defined.as_mut() {
            if let Some(etag) = &src_info.etag {
                ud.insert("etag".to_owned(), etag.clone());
            }
        }

        let mod_time = OffsetDateTime::now_utc();

        for fi in metas.iter_mut() {
            if fi.is_valid() {
                fi.metadata = src_info.user_defined.as_ref().cloned().unwrap_or_default();
                fi.mod_time = Some(mod_time);
                fi.version_id = version_id;
                fi.versioned = src_opts.versioned || src_opts.version_suspended;

                if !fi.inline_data() {
                    fi.data = None;
                }

                if inline_data {
                    fi.set_inline_data();
                }
            }
        }

        Self::write_unique_file_info(&online_disks, "", src_bucket, src_object, &metas, write_quorum)
            .await
            .map_err(|e| to_object_err(e.into(), vec![src_bucket, src_object]))?;

        Ok(ObjectInfo::from_file_info(
            &fi,
            src_bucket,
            src_object,
            src_opts.versioned || src_opts.version_suspended,
        ))
    }
    #[tracing::instrument(skip(self))]
    async fn delete_objects(
        &self,
        bucket: &str,
        objects: Vec<ObjectToDelete>,
        opts: ObjectOptions,
    ) -> Result<(Vec<DeletedObject>, Vec<Option<Error>>)> {
        // 默认返回值
        let mut del_objects = vec![DeletedObject::default(); objects.len()];

        let mut del_errs = Vec::with_capacity(objects.len());

        for _ in 0..objects.len() {
            del_errs.push(None)
        }

        // let mut del_fvers = Vec::with_capacity(objects.len());

        let mut vers_map: HashMap<&String, FileInfoVersions> = HashMap::new();

        for (i, dobj) in objects.iter().enumerate() {
            let mut vr = FileInfo {
                name: dobj.object_name.clone(),
                version_id: dobj.version_id,
                ..Default::default()
            };

            // 删除
            del_objects[i].object_name.clone_from(&vr.name);
            del_objects[i].version_id = vr.version_id.map(|v| v.to_string());

            if del_objects[i].version_id.is_none() {
                let (suspended, versioned) = (opts.version_suspended, opts.versioned);
                if suspended || versioned {
                    vr.mod_time = Some(OffsetDateTime::now_utc());
                    vr.deleted = true;
                    if versioned {
                        vr.version_id = Some(Uuid::new_v4());
                    }
                }
            }

            let v = {
                if vers_map.contains_key(&dobj.object_name) {
                    let val = vers_map.get_mut(&dobj.object_name).unwrap();
                    val.versions.push(vr.clone());
                    val.clone()
                } else {
                    FileInfoVersions {
                        name: vr.name.clone(),
                        versions: vec![vr.clone()],
                        ..Default::default()
                    }
                }
            };

            if vr.deleted {
                del_objects[i] = DeletedObject {
                    delete_marker: vr.deleted,
                    delete_marker_version_id: vr.version_id.map(|v| v.to_string()),
                    delete_marker_mtime: vr.mod_time,
                    object_name: vr.name.clone(),
                    ..Default::default()
                }
            } else {
                del_objects[i] = DeletedObject {
                    object_name: vr.name.clone(),
                    version_id: vr.version_id.map(|v| v.to_string()),
                    ..Default::default()
                }
            }

            vers_map.insert(&dobj.object_name, v);
        }

        let mut vers = Vec::with_capacity(vers_map.len());

        for (_, ver) in vers_map {
            vers.push(ver);
        }

        let disks = self.disks.read().await;

        let disks = disks.clone();

        let mut futures = Vec::with_capacity(disks.len());

        // let mut errors = Vec::with_capacity(disks.len());

        for disk in disks.iter() {
            let vers = vers.clone();
            futures.push(async move {
                if let Some(disk) = disk {
                    disk.delete_versions(bucket, vers, DeleteOptions::default()).await
                } else {
                    Err(DiskError::DiskNotFound)
                }
            });
        }

        let results = join_all(futures).await;

        for errs in results.into_iter().flatten() {
            // TODO: handle err reduceWriteQuorumErrs
            for err in errs.iter().flatten() {
                warn!("result err {:?}", err);
            }
        }

        Ok((del_objects, del_errs))
    }

    #[tracing::instrument(skip(self))]
    async fn delete_object(&self, bucket: &str, object: &str, opts: ObjectOptions) -> Result<ObjectInfo> {
        if opts.delete_prefix {
            self.delete_prefix(bucket, object)
                .await
                .map_err(|e| to_object_err(e.into(), vec![bucket, object]))?;

            return Ok(ObjectInfo::default());
        }
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn list_objects_v2(
        self: Arc<Self>,
        _bucket: &str,
        _prefix: &str,
        _continuation_token: Option<String>,
        _delimiter: Option<String>,
        _max_keys: i32,
        _fetch_owner: bool,
        _start_after: Option<String>,
    ) -> Result<ListObjectsV2Info> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn list_object_versions(
        self: Arc<Self>,
        _bucket: &str,
        _prefix: &str,
        _marker: Option<String>,
        _version_marker: Option<String>,
        _delimiter: Option<String>,
        _max_keys: i32,
    ) -> Result<ListObjectVersionsInfo> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn get_object_info(&self, bucket: &str, object: &str, opts: &ObjectOptions) -> Result<ObjectInfo> {
        // let mut _ns = None;
        // if !opts.no_lock {
        //     let paths = vec![object.to_string()];
        //     let ns_lock = new_nslock(
        //         Arc::clone(&self.ns_mutex),
        //         self.locker_owner.clone(),
        //         bucket.to_string(),
        //         paths,
        //         self.lockers.clone(),
        //     )
        //     .await;
        //     if !ns_lock
        //         .0
        //         .write()
        //         .await
        //         .get_lock(&Options {
        //             timeout: Duration::from_secs(5),
        //             retry_interval: Duration::from_secs(1),
        //         })
        //         .await
        //         .map_err(|err| Error::other(err.to_string()))?
        //     {
        //         return Err(Error::other("can not get lock. please retry".to_string()));
        //     }

        //     _ns = Some(ns_lock);
        // }

        let (fi, _, _) = self
            .get_object_fileinfo(bucket, object, opts, false)
            .await
            .map_err(|e| to_object_err(e, vec![bucket, object]))?;

        // warn!("get object_info fi {:?}", &fi);

        let oi = ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended);

        Ok(oi)
    }

    #[tracing::instrument(skip(self))]
    async fn put_object_metadata(&self, bucket: &str, object: &str, opts: &ObjectOptions) -> Result<ObjectInfo> {
        // TODO: nslock

        let disks = self.get_disks_internal().await;

        let (metas, errs) = {
            if opts.version_id.is_some() {
                Self::read_all_fileinfo(
                    &disks,
                    "",
                    bucket,
                    object,
                    opts.version_id.as_ref().unwrap().to_string().as_str(),
                    false,
                    false,
                )
                .await?
            } else {
                Self::read_all_xl(&disks, bucket, object, false, false).await
            }
        };

        let read_quorum = match Self::object_quorum_from_meta(&metas, &errs, self.default_parity_count) {
            Ok((res, _)) => res,
            Err(mut err) => {
                if err == DiskError::ErasureReadQuorum
                    && !bucket.starts_with(RUSTFS_META_BUCKET)
                    && self
                        .delete_if_dang_ling(bucket, object, &metas, &errs, &HashMap::new(), opts.clone())
                        .await
                        .is_ok()
                {
                    if opts.version_id.is_some() {
                        err = DiskError::FileVersionNotFound
                    } else {
                        err = DiskError::FileNotFound
                    }
                }
                return Err(to_object_err(err.into(), vec![bucket, object]));
            }
        };

        let read_quorum = read_quorum as usize;

        let (online_disks, mod_time, etag) = Self::list_online_disks(&disks, &metas, &errs, read_quorum);

        let mut fi = Self::pick_valid_fileinfo(&metas, mod_time, etag, read_quorum)
            .map_err(|e| to_object_err(e.into(), vec![bucket, object]))?;

        if fi.deleted {
            return Err(to_object_err(Error::MethodNotAllowed, vec![bucket, object]));
        }

        let obj_info = ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended);

        if let Some(ud) = obj_info.user_defined.as_ref() {
            for (k, v) in ud {
                fi.metadata.insert(k.clone(), v.clone());
            }
        }

        if let Some(mt) = &opts.eval_metadata {
            for (k, v) in mt {
                fi.metadata.insert(k.clone(), v.clone());
            }
        }

        fi.mod_time = opts.mod_time;
        if let Some(ref version_id) = opts.version_id {
            fi.version_id = Uuid::parse_str(version_id).ok();
        }

        self.update_object_meta(bucket, object, fi.clone(), &online_disks)
            .await
            .map_err(|e| to_object_err(e.into(), vec![bucket, object]))?;

        Ok(ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended))
    }

    #[tracing::instrument(skip(self))]
    async fn get_object_tags(&self, bucket: &str, object: &str, opts: &ObjectOptions) -> Result<String> {
        let oi = self.get_object_info(bucket, object, opts).await?;
        Ok(oi.user_tags)
    }

    #[tracing::instrument(level = "debug", skip(self))]
    async fn put_object_tags(&self, bucket: &str, object: &str, tags: &str, opts: &ObjectOptions) -> Result<ObjectInfo> {
        let (mut fi, _, disks) = self.get_object_fileinfo(bucket, object, opts, false).await?;

        fi.metadata.insert(AMZ_OBJECT_TAGGING.to_owned(), tags.to_owned());

        // TODO: userdeefined

        self.update_object_meta(bucket, object, fi.clone(), disks.as_slice()).await?;

        // TODO: versioned
        Ok(ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended))
    }

    #[tracing::instrument(skip(self))]
    async fn delete_object_tags(&self, bucket: &str, object: &str, opts: &ObjectOptions) -> Result<ObjectInfo> {
        self.put_object_tags(bucket, object, "", opts).await
    }

    #[tracing::instrument(skip(self))]
    async fn copy_object_part(
        &self,
        _src_bucket: &str,
        _src_object: &str,
        _dst_bucket: &str,
        _dst_object: &str,
        _upload_id: &str,
        _part_id: usize,
        _start_offset: i64,
        _length: i64,
        _src_info: &ObjectInfo,
        _src_opts: &ObjectOptions,
        _dst_opts: &ObjectOptions,
    ) -> Result<()> {
        unimplemented!()
    }

    #[tracing::instrument(level = "debug", skip(self, data, opts))]
    async fn put_object_part(
        &self,
        bucket: &str,
        object: &str,
        upload_id: &str,
        part_id: usize,
        data: &mut PutObjReader,
        opts: &ObjectOptions,
    ) -> Result<PartInfo> {
        let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);

        let (mut fi, _) = self.check_upload_id_exists(bucket, object, upload_id, true).await?;

        let write_quorum = fi.write_quorum(self.default_write_quorum());

        let disks = self.disks.read().await;

        let disks = disks.clone();
        let shuffle_disks = Self::shuffle_disks(&disks, &fi.erasure.distribution);

        let part_suffix = format!("part.{}", part_id);
        let tmp_part = format!("{}x{}", Uuid::new_v4(), OffsetDateTime::now_utc().unix_timestamp());
        let tmp_part_path = Arc::new(format!("{}/{}", tmp_part, part_suffix));

        // let mut writers = Vec::with_capacity(disks.len());
        // let erasure = Erasure::new(fi.erasure.data_blocks, fi.erasure.parity_blocks, fi.erasure.block_size);
        // let shared_size = erasure.shard_size(erasure.block_size);

        // let futures = disks.iter().map(|disk| {
        //     let disk = disk.clone();
        //     let tmp_part_path = tmp_part_path.clone();
        //     tokio::spawn(async move {
        //         if let Some(disk) = disk {
        //             // let writer = disk.append_file(RUSTFS_META_TMP_BUCKET, &tmp_part_path).await?;
        //             // let filewriter = disk
        //             //     .create_file("", RUSTFS_META_TMP_BUCKET, &tmp_part_path, data.content_length)
        //             //     .await?;
        //             match new_bitrot_filewriter(
        //                 disk.clone(),
        //                 RUSTFS_META_TMP_BUCKET,
        //                 &tmp_part_path,
        //                 false,
        //                 DEFAULT_BITROT_ALGO,
        //                 shared_size,
        //             )
        //             .await
        //             {
        //                 Ok(writer) => Ok(Some(writer)),
        //                 Err(e) => Err(e),
        //             }
        //         } else {
        //             Ok(None)
        //         }
        //     })
        // });
        // for x in join_all(futures).await {
        //     let x = x??;
        //     writers.push(x);
        // }

        // let erasure = Erasure::new(fi.erasure.data_blocks, fi.erasure.parity_blocks, fi.erasure.block_size);

        // let stream = replace(&mut data.stream, Box::new(empty()));
        // let etag_stream = EtagReader::new(stream);

        // let (w_size, mut etag) = Arc::new(erasure)
        //     .encode(etag_stream, &mut writers, data.content_length, write_quorum)
        //     .await?;

        // if let Err(err) = close_bitrot_writers(&mut writers).await {
        //     error!("close_bitrot_writers err {:?}", err);
        // }

        let erasure = erasure_coding::Erasure::new(fi.erasure.data_blocks, fi.erasure.parity_blocks, fi.erasure.block_size);

        let mut writers = Vec::with_capacity(shuffle_disks.len());
        let mut errors = Vec::with_capacity(shuffle_disks.len());
        for disk_op in shuffle_disks.iter() {
            if let Some(disk) = disk_op {
                let writer = create_bitrot_writer(
                    false,
                    Some(disk),
                    RUSTFS_META_TMP_BUCKET,
                    &tmp_part_path,
                    erasure.shard_file_size(data.size()),
                    erasure.shard_size(),
                    HashAlgorithm::HighwayHash256,
                )
                .await?;

                // let writer = {
                //     let f = match disk
                //         .create_file("", RUSTFS_META_TMP_BUCKET, &tmp_part_path, erasure.shard_file_size(data.content_length))
                //         .await
                //     {
                //         Ok(f) => f,
                //         Err(e) => {
                //             errors.push(Some(e));
                //             writers.push(None);
                //             continue;
                //         }
                //     };

                //     BitrotWriter::new(Writer::from_tokio_writer(f), erasure.shard_size(), HashAlgorithm::HighwayHash256)
                // };

                writers.push(Some(writer));
                errors.push(None);
            } else {
                errors.push(Some(DiskError::DiskNotFound));
                writers.push(None);
            }
        }

        let nil_count = errors.iter().filter(|&e| e.is_none()).count();
        if nil_count < write_quorum {
            if let Some(write_err) = reduce_write_quorum_errs(&errors, OBJECT_OP_IGNORED_ERRS, write_quorum) {
                return Err(to_object_err(write_err.into(), vec![bucket, object]));
            }

            return Err(Error::other(format!("not enough disks to write: {:?}", errors)));
        }

        let stream = mem::replace(
            &mut data.stream,
            HashReader::new(Box::new(WarpReader::new(Cursor::new(Vec::new()))), 0, 0, None, false)?,
        );

        let (reader, w_size) = Arc::new(erasure).encode(stream, &mut writers, write_quorum).await?; // TODO: 出错，删除临时目录

        let _ = mem::replace(&mut data.stream, reader);

        if (w_size as i64) < data.size() {
            return Err(Error::other("put_object_part write size < data.size()"));
        }

        let index_op = data.stream.try_get_index().map(|v| v.clone().into_vec());

        let mut etag = data.stream.try_resolve_etag().unwrap_or_default();

        if let Some(ref tag) = opts.preserve_etag {
            etag = tag.clone();
        }

        let mut actual_size = data.actual_size();
        if actual_size < 0 {
            let is_compressed = fi.is_compressed();
            if !is_compressed {
                actual_size = w_size as i64;
            }
        }

        let part_info = ObjectPartInfo {
            etag: etag.clone(),
            number: part_id,
            size: w_size,
            mod_time: Some(OffsetDateTime::now_utc()),
            actual_size,
            index: index_op,
            ..Default::default()
        };

        // debug!("put_object_part part_info {:?}", part_info);

        fi.parts = vec![part_info];

        let fi_buff = fi.marshal_msg()?;

        let part_path = format!("{}/{}/{}", upload_id_path, fi.data_dir.unwrap_or_default(), part_suffix);
        let _ = Self::rename_part(
            &disks,
            RUSTFS_META_TMP_BUCKET,
            &tmp_part_path,
            RUSTFS_META_MULTIPART_BUCKET,
            &part_path,
            fi_buff.into(),
            write_quorum,
        )
        .await?;

        let ret: PartInfo = PartInfo {
            etag: Some(etag.clone()),
            part_num: part_id,
            last_mod: Some(OffsetDateTime::now_utc()),
            size: w_size,
            actual_size,
        };

        // error!("put_object_part ret {:?}", &ret);

        Ok(ret)
    }

    #[tracing::instrument(skip(self))]
    async fn list_multipart_uploads(
        &self,
        bucket: &str,
        object: &str,
        key_marker: Option<String>,
        upload_id_marker: Option<String>,
        delimiter: Option<String>,
        max_uploads: usize,
    ) -> Result<ListMultipartsInfo> {
        let disks = {
            let disks = self.get_online_local_disks().await;
            if disks.is_empty() {
                // TODO: getOnlineDisksWithHealing
                self.get_online_disks().await
            } else {
                disks
            }
        };

        let mut upload_ids: Vec<String> = Vec::new();

        for disk in disks.iter().flatten() {
            if !disk.is_online().await {
                continue;
            }

            let has_uoload_ids = match disk
                .list_dir(
                    bucket,
                    RUSTFS_META_MULTIPART_BUCKET,
                    Self::get_multipart_sha_dir(bucket, object).as_str(),
                    -1,
                )
                .await
            {
                Ok(res) => Some(res),
                Err(err) => {
                    if err == DiskError::DiskNotFound {
                        None
                    } else if err == DiskError::FileNotFound {
                        return Ok(ListMultipartsInfo {
                            key_marker: key_marker.to_owned(),
                            max_uploads,
                            prefix: object.to_owned(),
                            delimiter: delimiter.to_owned(),
                            ..Default::default()
                        });
                    } else {
                        return Err(to_object_err(err.into(), vec![bucket, object]));
                    }
                }
            };

            if let Some(ids) = has_uoload_ids {
                upload_ids = ids;
                break;
            }
        }

        let mut uploads = Vec::new();

        let mut populated_upload_ids = HashSet::new();

        for upload_id in upload_ids.iter() {
            let upload_id = upload_id.trim_end_matches(SLASH_SEPARATOR).to_string();
            if populated_upload_ids.contains(&upload_id) {
                continue;
            }

            let start_time = {
                let now = OffsetDateTime::now_utc();

                let splits: Vec<&str> = upload_id.split("x").collect();
                if splits.len() == 2 {
                    if let Ok(unix) = splits[1].parse::<i64>() {
                        OffsetDateTime::from_unix_timestamp(unix)?
                    } else {
                        now
                    }
                } else {
                    now
                }
            };

            uploads.push(MultipartInfo {
                bucket: bucket.to_owned(),
                object: object.to_owned(),
                upload_id: base64_encode(format!("{}.{}", get_global_deployment_id().unwrap_or_default(), upload_id).as_bytes()),
                initiated: Some(start_time),
                ..Default::default()
            });

            populated_upload_ids.insert(upload_id);
        }

        uploads.sort_by(|a, b| a.initiated.cmp(&b.initiated));

        let mut upload_idx = 0;
        if let Some(upload_id_marker) = &upload_id_marker {
            while upload_idx < uploads.len() {
                if &uploads[upload_idx].upload_id != upload_id_marker {
                    upload_idx += 1;
                    continue;
                }

                if &uploads[upload_idx].upload_id == upload_id_marker {
                    upload_idx += 1;
                    break;
                }

                upload_idx += 1;
            }
        }

        let mut ret_uploads = Vec::new();
        let mut next_upload_id_marker = None;
        while upload_idx < uploads.len() {
            ret_uploads.push(uploads[upload_idx].clone());
            next_upload_id_marker = Some(uploads[upload_idx].upload_id.clone());
            upload_idx += 1;

            if ret_uploads.len() > max_uploads {
                break;
            }
        }

        let is_truncated = ret_uploads.len() < uploads.len();

        if !is_truncated {
            next_upload_id_marker = None;
        }

        Ok(ListMultipartsInfo {
            key_marker: key_marker.to_owned(),
            next_upload_id_marker,
            max_uploads,
            is_truncated,
            uploads: ret_uploads,
            prefix: object.to_owned(),
            delimiter: delimiter.to_owned(),
            ..Default::default()
        })
    }

    #[tracing::instrument(skip(self))]
    async fn new_multipart_upload(&self, bucket: &str, object: &str, opts: &ObjectOptions) -> Result<MultipartUploadResult> {
        let disks = self.disks.read().await;

        let disks = disks.clone();

        let mut user_defined = opts.user_defined.clone().unwrap_or_default();

        if let Some(ref etag) = opts.preserve_etag {
            user_defined.insert("etag".to_owned(), etag.clone());
        }

        if let Some(sc) = user_defined.get(AMZ_STORAGE_CLASS) {
            if sc == storageclass::STANDARD {
                let _ = user_defined.remove(AMZ_STORAGE_CLASS);
            }
        }

        let sc_parity_drives = {
            if let Some(sc) = GLOBAL_StorageClass.get() {
                sc.get_parity_for_sc(user_defined.get(AMZ_STORAGE_CLASS).cloned().unwrap_or_default().as_str())
            } else {
                None
            }
        };

        let mut parity_drives = sc_parity_drives.unwrap_or(self.default_parity_count);
        if opts.max_parity {
            parity_drives = disks.len() / 2;
        }

        let data_drives = disks.len() - parity_drives;
        let mut write_quorum = data_drives;
        if data_drives == parity_drives {
            write_quorum += 1
        }

        let mut fi = FileInfo::new([bucket, object].join("/").as_str(), data_drives, parity_drives);

        fi.version_id = if let Some(vid) = &opts.version_id {
            Some(Uuid::parse_str(vid)?)
        } else {
            None
        };

        if opts.versioned && opts.version_id.is_none() {
            fi.version_id = Some(Uuid::new_v4());
        }

        fi.data_dir = Some(Uuid::new_v4());
        fi.fresh = true;

        let parts_metadata = vec![fi.clone(); disks.len()];

        if !user_defined.contains_key("content-type") {
            // TODO: get content-type
        }

        if let Some(sc) = user_defined.get(AMZ_STORAGE_CLASS) {
            if sc == storageclass::STANDARD {
                let _ = user_defined.remove(AMZ_STORAGE_CLASS);
            }
        }

        let (shuffle_disks, mut parts_metadatas) = Self::shuffle_disks_and_parts_metadata(&disks, &parts_metadata, &fi);

        let mod_time = opts.mod_time.unwrap_or(OffsetDateTime::now_utc());

        for fi in parts_metadatas.iter_mut() {
            fi.metadata = user_defined.clone();
            fi.mod_time = Some(mod_time);
            fi.fresh = true;
        }

        // fi.mod_time = Some(now);

        let upload_uuid = format!("{}x{}", Uuid::new_v4(), mod_time.unix_timestamp_nanos());

        let upload_id = base64_encode(format!("{}.{}", get_global_deployment_id().unwrap_or_default(), upload_uuid).as_bytes());

        let upload_path = Self::get_upload_id_dir(bucket, object, upload_uuid.as_str());

        Self::write_unique_file_info(
            &shuffle_disks,
            bucket,
            RUSTFS_META_MULTIPART_BUCKET,
            upload_path.as_str(),
            &parts_metadatas,
            write_quorum,
        )
        .await
        .map_err(|e| to_object_err(e.into(), vec![bucket, object]))?;

        // evalDisks

        Ok(MultipartUploadResult { upload_id })
    }

    #[tracing::instrument(skip(self))]
    async fn get_multipart_info(
        &self,
        bucket: &str,
        object: &str,
        upload_id: &str,
        _opts: &ObjectOptions,
    ) -> Result<MultipartInfo> {
        // TODO: nslock
        let (fi, _) = self
            .check_upload_id_exists(bucket, object, upload_id, false)
            .await
            .map_err(|e| to_object_err(e, vec![bucket, object, upload_id]))?;

        Ok(MultipartInfo {
            bucket: bucket.to_owned(),
            object: object.to_owned(),
            upload_id: upload_id.to_owned(),
            user_defined: fi.metadata.clone(),
            ..Default::default()
        })
    }

    #[tracing::instrument(skip(self))]
    async fn abort_multipart_upload(&self, bucket: &str, object: &str, upload_id: &str, _opts: &ObjectOptions) -> Result<()> {
        self.check_upload_id_exists(bucket, object, upload_id, false).await?;
        let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);

        self.delete_all(RUSTFS_META_MULTIPART_BUCKET, &upload_id_path).await
    }
    // complete_multipart_upload 完成
    #[tracing::instrument(skip(self))]
    async fn complete_multipart_upload(
        self: Arc<Self>,
        bucket: &str,
        object: &str,
        upload_id: &str,
        uploaded_parts: Vec<CompletePart>,
        opts: &ObjectOptions,
    ) -> Result<ObjectInfo> {
        let (mut fi, files_metas) = self.check_upload_id_exists(bucket, object, upload_id, true).await?;
        let upload_id_path = Self::get_upload_id_dir(bucket, object, upload_id);

        let write_quorum = fi.write_quorum(self.default_write_quorum());

        let disks = self.disks.read().await;

        let disks = disks.clone();
        // let disks = Self::shuffle_disks(&disks, &fi.erasure.distribution);

        let part_path = format!("{}/{}/", upload_id_path, fi.data_dir.unwrap_or(Uuid::nil()));

        let files: Vec<String> = uploaded_parts.iter().map(|v| format!("part.{}.meta", v.part_num)).collect();

        // readMultipleFiles

        let req = ReadMultipleReq {
            bucket: RUSTFS_META_MULTIPART_BUCKET.to_string(),
            prefix: part_path,
            files,
            max_size: 1 << 20,
            metadata_only: true,
            abort404: true,
            max_results: 0,
        };

        let part_files_resp = Self::read_multiple_files(&disks, req, write_quorum).await;

        if part_files_resp.len() != uploaded_parts.len() {
            return Err(Error::other("part result number err"));
        }

        for (i, res) in part_files_resp.iter().enumerate() {
            let part_id = uploaded_parts[i].part_num;
            if !res.error.is_empty() || !res.exists {
                error!("complete_multipart_upload part_id err {:?}, exists={}", res, res.exists);
                return Err(Error::InvalidPart(part_id, bucket.to_owned(), object.to_owned()));
            }

            let part_fi = FileInfo::unmarshal(&res.data).map_err(|e| {
                error!(
                    "complete_multipart_upload FileInfo::unmarshal err {:?}, part_id={}, bucket={}, object={}",
                    e, part_id, bucket, object
                );
                Error::InvalidPart(part_id, bucket.to_owned(), object.to_owned())
            })?;
            let part = &part_fi.parts[0];
            let part_num = part.number;

            // debug!("complete part {} file info {:?}", part_num, &part_fi);
            // debug!("complete part {} object info {:?}", part_num, &part);

            if part_id != part_num {
                error!("complete_multipart_upload part_id err part_id != part_num {} != {}", part_id, part_num);
                return Err(Error::InvalidPart(part_id, bucket.to_owned(), object.to_owned()));
            }

            fi.add_object_part(
                part.number,
                part.etag.clone(),
                part.size,
                part.mod_time,
                part.actual_size,
                part.index.clone(),
            );
        }

        let (shuffle_disks, mut parts_metadatas) = Self::shuffle_disks_and_parts_metadata_by_index(&disks, &files_metas, &fi);

        let curr_fi = fi.clone();

        fi.parts = Vec::with_capacity(uploaded_parts.len());

        let mut object_size: usize = 0;
        let mut object_actual_size: i64 = 0;

        for (i, p) in uploaded_parts.iter().enumerate() {
            let has_part = curr_fi.parts.iter().find(|v| v.number == p.part_num);
            if has_part.is_none() {
                error!(
                    "complete_multipart_upload has_part.is_none() {:?}, part_id={}, bucket={}, object={}",
                    has_part, p.part_num, bucket, object
                );
                return Err(Error::InvalidPart(p.part_num, "".to_owned(), p.etag.clone().unwrap_or_default()));
            }

            let ext_part = &curr_fi.parts[i];

            if p.etag != Some(ext_part.etag.clone()) {
                error!(
                    "complete_multipart_upload etag err {:?}, part_id={}, bucket={}, object={}",
                    p.etag, p.part_num, bucket, object
                );
                return Err(Error::InvalidPart(p.part_num, ext_part.etag.clone(), p.etag.clone().unwrap_or_default()));
            }

            // TODO: crypto

            if (i < uploaded_parts.len() - 1) && !is_min_allowed_part_size(ext_part.actual_size) {
                error!(
                    "complete_multipart_upload is_min_allowed_part_size err {:?}, part_id={}, bucket={}, object={}",
                    ext_part.actual_size, p.part_num, bucket, object
                );
                return Err(Error::InvalidPart(p.part_num, ext_part.etag.clone(), p.etag.clone().unwrap_or_default()));
            }

            object_size += ext_part.size;
            object_actual_size += ext_part.actual_size;

            fi.parts.push(ObjectPartInfo {
                etag: ext_part.etag.clone(),
                number: p.part_num,
                size: ext_part.size,
                mod_time: ext_part.mod_time,
                actual_size: ext_part.actual_size,
                index: ext_part.index.clone(),
                ..Default::default()
            });
        }

        fi.size = object_size as i64;
        fi.mod_time = opts.mod_time;
        if fi.mod_time.is_none() {
            fi.mod_time = Some(OffsetDateTime::now_utc());
        }

        // etag
        let etag = {
            if let Some(Some(etag)) = opts.user_defined.as_ref().map(|v| v.get("etag")) {
                etag.clone()
            } else {
                get_complete_multipart_md5(&uploaded_parts)
            }
        };

        fi.metadata.insert("etag".to_owned(), etag);

        fi.metadata
            .insert(format!("{}actual-size", RESERVED_METADATA_PREFIX_LOWER), object_actual_size.to_string());

        if fi.is_compressed() {
            fi.metadata
                .insert(format!("{}compression-size", RESERVED_METADATA_PREFIX_LOWER), object_size.to_string());
        }

        if opts.data_movement {
            fi.set_data_moved();
        }

        // TODO: object_actual_size
        let _ = object_actual_size;

        for meta in parts_metadatas.iter_mut() {
            if meta.is_valid() {
                meta.size = fi.size;
                meta.mod_time = fi.mod_time;
                meta.parts.clone_from(&fi.parts);
                meta.metadata = fi.metadata.clone();
                meta.versioned = opts.versioned || opts.version_suspended;

                // TODO: Checksum
            }
        }

        let mut parts = Vec::with_capacity(curr_fi.parts.len());
        // TODO: 优化 cleanupMultipartPath
        for p in curr_fi.parts.iter() {
            parts.push(path_join_buf(&[
                &upload_id_path,
                curr_fi.data_dir.unwrap_or(Uuid::nil()).to_string().as_str(),
                format!("part.{}.meta", p.number).as_str(),
            ]));

            if !fi.parts.iter().any(|v| v.number == p.number) {
                parts.push(path_join_buf(&[
                    &upload_id_path,
                    curr_fi.data_dir.unwrap_or(Uuid::nil()).to_string().as_str(),
                    format!("part.{}", p.number).as_str(),
                ]));
            }

            // let _ = self
            //     .remove_part_meta(
            //         bucket,
            //         object,
            //         upload_id,
            //         curr_fi.data_dir.unwrap_or(Uuid::nil()).to_string().as_str(),
            //         p.number,
            //     )
            //     .await;

            // if !fi.parts.iter().any(|v| v.number == p.number) {
            //     let _ = self
            //         .remove_object_part(
            //             bucket,
            //             object,
            //             upload_id,
            //             curr_fi.data_dir.unwrap_or(Uuid::nil()).to_string().as_str(),
            //             p.number,
            //         )
            //         .await;
            // }
        }

        {
            let disks = self.get_disks_internal().await;
            Self::cleanup_multipart_path(&disks, &parts).await;
        }

        let (online_disks, versions, op_old_dir) = Self::rename_data(
            &shuffle_disks,
            RUSTFS_META_MULTIPART_BUCKET,
            &upload_id_path,
            &parts_metadatas,
            bucket,
            object,
            write_quorum,
        )
        .await?;

        // debug!("complete fileinfo {:?}", &fi);

        // TODO: reduce_common_data_dir
        if let Some(old_dir) = op_old_dir {
            self.commit_rename_data_dir(&shuffle_disks, bucket, object, &old_dir.to_string(), write_quorum)
                .await?;
        }
        if let Some(versions) = versions {
            GLOBAL_MRFState
                .add_partial(PartialOperation {
                    bucket: bucket.to_string(),
                    object: object.to_string(),
                    queued: Utc::now(),
                    versions,
                    set_index: self.set_index,
                    pool_index: self.pool_index,
                    ..Default::default()
                })
                .await;
        }

        let upload_id_path = upload_id_path.clone();
        let store = self.clone();
        let _cleanup_handle = tokio::spawn(async move {
            let _ = store.delete_all(RUSTFS_META_MULTIPART_BUCKET, &upload_id_path).await;
        });

        for (i, op_disk) in online_disks.iter().enumerate() {
            if let Some(disk) = op_disk {
                if disk.is_online().await {
                    fi = parts_metadatas[i].clone();
                    break;
                }
            }
        }

        fi.is_latest = true;

        Ok(ObjectInfo::from_file_info(&fi, bucket, object, opts.versioned || opts.version_suspended))
    }

    #[tracing::instrument(skip(self))]
    async fn get_disks(&self, _pool_idx: usize, _set_idx: usize) -> Result<Vec<Option<DiskStore>>> {
        Ok(self.get_disks_internal().await)
    }

    #[tracing::instrument(skip(self))]
    fn set_drive_counts(&self) -> Vec<usize> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn delete_bucket(&self, _bucket: &str, _opts: &DeleteBucketOptions) -> Result<()> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn heal_format(&self, _dry_run: bool) -> Result<(HealResultItem, Option<Error>)> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn heal_bucket(&self, _bucket: &str, _opts: &HealOpts) -> Result<HealResultItem> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn heal_object(
        &self,
        bucket: &str,
        object: &str,
        version_id: &str,
        opts: &HealOpts,
    ) -> Result<(HealResultItem, Option<Error>)> {
        if has_suffix(object, SLASH_SEPARATOR) {
            let (result, err) = self.heal_object_dir(bucket, object, opts.dry_run, opts.remove).await?;
            return Ok((result, err.map(|e| e.into())));
        }

        let disks = self.disks.read().await;

        let disks = disks.clone();
        let (_, errs) = Self::read_all_fileinfo(&disks, "", bucket, object, version_id, false, false).await?;
        if DiskError::is_all_not_found(&errs) {
            warn!(
                "heal_object failed, all obj part not found, bucket: {}, obj: {}, version_id: {}",
                bucket, object, version_id
            );
            let err = if !version_id.is_empty() {
                Error::FileVersionNotFound
            } else {
                Error::FileNotFound
            };
            return Ok((
                self.default_heal_result(FileInfo::default(), &errs, bucket, object, version_id)
                    .await,
                Some(err),
            ));
        }

        // Heal the object.
        let (result, err) = self.heal_object(bucket, object, version_id, opts).await?;
        if let Some(err) = err.as_ref() {
            match err {
                &DiskError::FileCorrupt if opts.scan_mode != HEAL_DEEP_SCAN => {
                    // Instead of returning an error when a bitrot error is detected
                    // during a normal heal scan, heal again with bitrot flag enabled.
                    let mut opts = *opts;
                    opts.scan_mode = HEAL_DEEP_SCAN;
                    let (result, err) = self.heal_object(bucket, object, version_id, &opts).await?;
                    return Ok((result, err.map(|e| e.into())));
                }
                _ => {}
            }
        }
        Ok((result, err.map(|e| e.into())))
    }

    #[tracing::instrument(skip(self))]
    async fn heal_objects(
        &self,
        _bucket: &str,
        _prefix: &str,
        _opts: &HealOpts,
        _hs: Arc<HealSequence>,
        _is_meta: bool,
    ) -> Result<()> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn get_pool_and_set(&self, _id: &str) -> Result<(Option<usize>, Option<usize>, Option<usize>)> {
        unimplemented!()
    }

    #[tracing::instrument(skip(self))]
    async fn check_abandoned_parts(&self, _bucket: &str, _object: &str, _opts: &HealOpts) -> Result<()> {
        unimplemented!()
    }
}

#[derive(Debug, PartialEq, Eq)]
struct ObjProps {
    mod_time: Option<OffsetDateTime>,
    num_versions: usize,
}

impl Hash for ObjProps {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        self.mod_time.hash(state);
        self.num_versions.hash(state);
    }
}

#[derive(Default, Clone, Debug)]
pub struct HealEntryResult {
    pub bytes: usize,
    pub success: bool,
    pub skipped: bool,
    pub entry_done: bool,
    pub name: String,
}

fn is_object_dang_ling(
    meta_arr: &[FileInfo],
    errs: &[Option<DiskError>],
    data_errs_by_part: &HashMap<usize, Vec<usize>>,
) -> disk::error::Result<FileInfo> {
    let mut valid_meta = FileInfo::default();
    let (not_found_meta_errs, non_actionable_meta_errs) = dang_ling_meta_errs_count(errs);

    let (mut not_found_parts_errs, mut non_actionable_parts_errs) = (0, 0);

    data_errs_by_part.iter().for_each(|(_, v)| {
        let (nf, na) = dang_ling_part_errs_count(v);
        if nf > not_found_parts_errs {
            (not_found_parts_errs, non_actionable_parts_errs) = (nf, na);
        }
    });

    meta_arr.iter().for_each(|fi| {
        if fi.is_valid() {
            valid_meta = fi.clone();
        }
    });

    if !valid_meta.is_valid() {
        let data_blocks = meta_arr.len().div_ceil(2);
        if not_found_parts_errs > data_blocks {
            return Ok(valid_meta);
        }

        return Err(DiskError::other("not ok"));
    }

    if non_actionable_meta_errs > 0 || non_actionable_parts_errs > 0 {
        return Err(DiskError::other("not ok"));
    }

    if valid_meta.deleted {
        let data_blocks = errs.len().div_ceil(2);
        if not_found_meta_errs > data_blocks {
            return Ok(valid_meta);
        }
        return Err(DiskError::other("not ok"));
    }

    if not_found_meta_errs > 0 && not_found_meta_errs > valid_meta.erasure.parity_blocks {
        return Ok(valid_meta);
    }

    if !valid_meta.is_remote() && not_found_parts_errs > 0 && not_found_parts_errs > valid_meta.erasure.parity_blocks {
        return Ok(valid_meta);
    }

    Err(DiskError::other("not ok"))
}

fn dang_ling_meta_errs_count(cerrs: &[Option<DiskError>]) -> (usize, usize) {
    let (mut not_found_count, mut non_actionable_count) = (0, 0);
    cerrs.iter().for_each(|err| {
        if let Some(err) = err {
            if err == &DiskError::FileNotFound || err == &DiskError::FileVersionNotFound {
                not_found_count += 1;
            } else {
                non_actionable_count += 1;
            }
        }
    });

    (not_found_count, non_actionable_count)
}

fn dang_ling_part_errs_count(results: &[usize]) -> (usize, usize) {
    let (mut not_found_count, mut non_actionable_count) = (0, 0);
    results.iter().for_each(|result| {
        if *result == CHECK_PART_SUCCESS {
            // skip
        } else if *result == CHECK_PART_FILE_NOT_FOUND {
            not_found_count += 1;
        } else {
            non_actionable_count += 1;
        }
    });

    (not_found_count, non_actionable_count)
}

fn is_object_dir_dang_ling(errs: &[Option<DiskError>]) -> bool {
    let mut found = 0;
    let mut not_found = 0;
    let mut found_not_empty = 0;
    let mut other_found = 0;
    errs.iter().for_each(|err| {
        if err.is_none() {
            found += 1;
        } else if let Some(err) = err {
            if err == &DiskError::FileNotFound || err == &DiskError::VolumeNotFound {
                not_found += 1;
            } else if err == &DiskError::VolumeNotEmpty {
                found_not_empty += 1;
            } else {
                other_found += 1;
            }
        }
    });

    found = found + found_not_empty + other_found;
    found < not_found && found > 0
}

fn join_errs(errs: &[Option<DiskError>]) -> String {
    let errs = errs
        .iter()
        .map(|err| {
            if let Some(err) = err {
                return err.to_string();
            }
            "<nil>".to_string()
        })
        .collect::<Vec<_>>();

    errs.join(", ")
}

async fn disks_with_all_parts(
    online_disks: &[Option<DiskStore>],
    parts_metadata: &mut [FileInfo],
    errs: &[Option<DiskError>],
    lastest_meta: &FileInfo,
    bucket: &str,
    object: &str,
    scan_mode: HealScanMode,
) -> disk::error::Result<(Vec<Option<DiskStore>>, HashMap<usize, Vec<usize>>, HashMap<usize, Vec<usize>>)> {
    let mut available_disks = vec![None; online_disks.len()];
    let mut data_errs_by_disk: HashMap<usize, Vec<usize>> = HashMap::new();
    for i in 0..online_disks.len() {
        data_errs_by_disk.insert(i, vec![1; lastest_meta.parts.len()]);
    }
    let mut data_errs_by_part: HashMap<usize, Vec<usize>> = HashMap::new();
    for i in 0..lastest_meta.parts.len() {
        data_errs_by_part.insert(i, vec![1; online_disks.len()]);
    }

    let mut inconsistent = 0;
    parts_metadata.iter().enumerate().for_each(|(index, meta)| {
        if meta.is_valid() && !meta.deleted && meta.erasure.distribution.len() != online_disks.len()
            || (!meta.erasure.distribution.is_empty() && meta.erasure.distribution[index] != meta.erasure.index)
        {
            warn!("file info inconsistent, meta: {:?}", meta);
            inconsistent += 1;
        }
    });

    let erasure_distribution_reliable = inconsistent <= parts_metadata.len() / 2;

    let mut meta_errs = Vec::with_capacity(errs.len());
    for _ in 0..errs.len() {
        meta_errs.push(None);
    }

    for (index, disk) in online_disks.iter().enumerate() {
        let disk = if let Some(disk) = disk {
            disk
        } else {
            meta_errs[index] = Some(DiskError::DiskNotFound);
            continue;
        };

        if let Some(err) = &errs[index] {
            meta_errs[index] = Some(err.clone());
            continue;
        }
        if !disk.is_online().await {
            meta_errs[index] = Some(DiskError::DiskNotFound);
            continue;
        }
        let meta = &parts_metadata[index];
        if !meta.mod_time.eq(&lastest_meta.mod_time) || !meta.data_dir.eq(&lastest_meta.data_dir) {
            warn!("mod_time is not Eq, file corrupt, index: {index}");
            meta_errs[index] = Some(DiskError::FileCorrupt);
            parts_metadata[index] = FileInfo::default();
            continue;
        }
        if erasure_distribution_reliable {
            if !meta.is_valid() {
                warn!("file info is not valid, file corrupt, index: {index}");
                parts_metadata[index] = FileInfo::default();
                meta_errs[index] = Some(DiskError::FileCorrupt);
                continue;
            }

            if !meta.deleted && meta.erasure.distribution.len() != online_disks.len() {
                warn!("file info distribution len not Eq online_disks len, file corrupt, index: {index}");
                parts_metadata[index] = FileInfo::default();
                meta_errs[index] = Some(DiskError::FileCorrupt);
                continue;
            }
        }
    }
    // info!("meta_errs: {:?}, errs: {:?}", meta_errs, errs);
    meta_errs.iter().enumerate().for_each(|(index, err)| {
        if err.is_some() {
            let part_err = conv_part_err_to_int(err);
            for p in 0..lastest_meta.parts.len() {
                data_errs_by_part.entry(p).or_insert(vec![0; meta_errs.len()])[index] = part_err;
            }
        }
    });

    // info!("data_errs_by_part: {:?}, data_errs_by_disk: {:?}", data_errs_by_part, data_errs_by_disk);
    for (index, disk) in online_disks.iter().enumerate() {
        if meta_errs[index].is_some() {
            continue;
        }

        let disk = if let Some(disk) = disk {
            disk
        } else {
            meta_errs[index] = Some(DiskError::DiskNotFound);
            continue;
        };

        let meta = &mut parts_metadata[index];
        if meta.deleted || meta.is_remote() {
            continue;
        }

        // Always check data, if we got it.
        if (meta.data.is_some() || meta.size == 0) && !meta.parts.is_empty() {
            if let Some(data) = &meta.data {
                let checksum_info = meta.erasure.get_checksum_info(meta.parts[0].number);
                let data_len = data.len();
                let verify_err = bitrot_verify(
                    Box::new(Cursor::new(data.clone())),
                    data_len,
                    meta.erasure.shard_file_size(meta.size) as usize,
                    checksum_info.algorithm,
                    checksum_info.hash,
                    meta.erasure.shard_size(),
                )
                .await
                .err();

                if let Some(vec) = data_errs_by_part.get_mut(&0) {
                    if index < vec.len() {
                        vec[index] = conv_part_err_to_int(&verify_err.map(|e| e.into()));
                        info!("bitrot check result: {}", vec[index]);
                    }
                }
            }
            continue;
        }

        let mut verify_resp = CheckPartsResp::default();
        let mut verify_err = None;
        meta.data_dir = lastest_meta.data_dir;
        if scan_mode == HEAL_DEEP_SCAN {
            // disk has a valid xl.meta but may not have all the
            // parts. This is considered an outdated disk, since
            // it needs healing too.
            match disk.verify_file(bucket, object, meta).await {
                Ok(v) => {
                    verify_resp = v;
                }
                Err(err) => {
                    verify_err = Some(err);
                }
            }
        } else {
            match disk.check_parts(bucket, object, meta).await {
                Ok(v) => {
                    verify_resp = v;
                }
                Err(err) => {
                    verify_err = Some(err);
                }
            }
        }

        for p in 0..lastest_meta.parts.len() {
            if let Some(vec) = data_errs_by_part.get_mut(&p) {
                if index < vec.len() {
                    if verify_err.is_some() {
                        info!("verify_err");
                        vec[index] = conv_part_err_to_int(&verify_err.clone());
                    } else {
                        info!("verify_resp, verify_resp.results {}", verify_resp.results[p]);
                        vec[index] = verify_resp.results[p];
                    }
                }
            }
        }
    }
    // info!("data_errs_by_part: {:?}, data_errs_by_disk: {:?}", data_errs_by_part, data_errs_by_disk);
    for (part, disks) in data_errs_by_part.iter() {
        for (idx, disk) in disks.iter().enumerate() {
            if let Some(vec) = data_errs_by_disk.get_mut(&idx) {
                vec[*part] = *disk;
            }
        }
    }
    // info!("data_errs_by_part: {:?}, data_errs_by_disk: {:?}", data_errs_by_part, data_errs_by_disk);
    for (i, disk) in online_disks.iter().enumerate() {
        if meta_errs[i].is_none() && disk.is_some() && !has_part_err(&data_errs_by_disk[&i]) {
            available_disks[i] = Some(disk.clone().unwrap());
        } else {
            parts_metadata[i] = FileInfo::default();
        }
    }

    Ok((available_disks, data_errs_by_disk, data_errs_by_part))
}

pub fn should_heal_object_on_disk(
    err: &Option<DiskError>,
    parts_errs: &[usize],
    meta: &FileInfo,
    lastest_meta: &FileInfo,
) -> (bool, Option<DiskError>) {
    if let Some(err) = err {
        if err == &DiskError::FileNotFound || err == &DiskError::FileVersionNotFound || err == &DiskError::FileCorrupt {
            return (true, Some(err.clone()));
        }
    }

    if lastest_meta.volume != meta.volume
        || lastest_meta.name != meta.name
        || lastest_meta.version_id != meta.version_id
        || lastest_meta.deleted != meta.deleted
    {
        info!("lastest_meta not Eq meta, lastest_meta: {:?}, meta: {:?}", lastest_meta, meta);
        return (true, Some(DiskError::OutdatedXLMeta));
    }
    if !meta.deleted && !meta.is_remote() {
        let err_vec = [CHECK_PART_FILE_NOT_FOUND, CHECK_PART_FILE_CORRUPT];
        for part_err in parts_errs.iter() {
            if err_vec.contains(part_err) {
                return (true, Some(DiskError::PartMissingOrCorrupt));
            }
        }
    }
    (false, err.clone())
}

async fn get_disks_info(disks: &[Option<DiskStore>], eps: &[Endpoint]) -> Vec<madmin::Disk> {
    let mut ret = Vec::new();

    for (i, pool) in disks.iter().enumerate() {
        if let Some(disk) = pool {
            match disk.disk_info(&DiskInfoOptions::default()).await {
                Ok(res) => ret.push(madmin::Disk {
                    endpoint: eps[i].to_string(),
                    local: eps[i].is_local,
                    pool_index: eps[i].pool_idx,
                    set_index: eps[i].set_idx,
                    disk_index: eps[i].disk_idx,
                    state: "ok".to_owned(),

                    root_disk: res.root_disk,
                    drive_path: res.mount_path.clone(),
                    healing: res.healing,
                    scanning: res.scanning,

                    uuid: res.id.clone(),
                    major: res.major as u32,
                    minor: res.minor as u32,
                    model: None,
                    total_space: res.total,
                    used_space: res.used,
                    available_space: res.free,
                    utilization: {
                        if res.total > 0 {
                            res.used as f64 / res.total as f64 * 100_f64
                        } else {
                            0_f64
                        }
                    },
                    used_inodes: res.used_inodes,
                    free_inodes: res.free_inodes,
                    ..Default::default()
                }),
                Err(err) => ret.push(madmin::Disk {
                    state: err.to_string(),
                    endpoint: eps[i].to_string(),
                    local: eps[i].is_local,
                    pool_index: eps[i].pool_idx,
                    set_index: eps[i].set_idx,
                    disk_index: eps[i].disk_idx,
                    ..Default::default()
                }),
            }
        } else {
            ret.push(madmin::Disk {
                endpoint: eps[i].to_string(),
                local: eps[i].is_local,
                pool_index: eps[i].pool_idx,
                set_index: eps[i].set_idx,
                disk_index: eps[i].disk_idx,
                state: DiskError::DiskNotFound.to_string(),
                ..Default::default()
            })
        }
    }

    ret
}
async fn get_storage_info(disks: &[Option<DiskStore>], eps: &[Endpoint]) -> madmin::StorageInfo {
    let mut disks = get_disks_info(disks, eps).await;
    disks.sort_by(|a, b| a.total_space.cmp(&b.total_space));

    madmin::StorageInfo {
        disks,
        backend: madmin::BackendInfo {
            backend_type: madmin::BackendByte::Erasure,
            ..Default::default()
        },
    }
}
pub async fn stat_all_dirs(disks: &[Option<DiskStore>], bucket: &str, prefix: &str) -> Vec<Option<DiskError>> {
    let mut errs = Vec::with_capacity(disks.len());
    let mut futures = Vec::with_capacity(disks.len());
    for disk in disks.iter().flatten() {
        let disk = disk.clone();
        let bucket = bucket.to_string();
        let prefix = prefix.to_string();
        futures.push(tokio::spawn(async move {
            match disk.list_dir("", &bucket, &prefix, 1).await {
                Ok(entries) => {
                    if !entries.is_empty() {
                        return Some(DiskError::VolumeNotEmpty);
                    }
                    None
                }
                Err(err) => Some(err),
            }
        }));
    }

    let results = join_all(futures).await;

    for err in results.into_iter().flatten() {
        errs.push(err);
    }
    errs
}

const GLOBAL_MIN_PART_SIZE: ByteSize = ByteSize::mib(5);
fn is_min_allowed_part_size(size: i64) -> bool {
    size >= GLOBAL_MIN_PART_SIZE.as_u64() as i64
}

fn get_complete_multipart_md5(parts: &[CompletePart]) -> String {
    let mut buf = Vec::new();

    for part in parts.iter() {
        if let Some(etag) = &part.etag {
            if let Ok(etag_bytes) = hex_simd::decode_to_vec(etag.as_bytes()) {
                buf.extend(etag_bytes);
            } else {
                buf.extend(etag.bytes());
            }
        }
    }

    let mut hasher = Md5::new();
    let _ = hasher.write(&buf);

    format!("{:x}-{}", hasher.finalize(), parts.len())
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::disk::CHECK_PART_UNKNOWN;
    use crate::disk::CHECK_PART_VOLUME_NOT_FOUND;
    use crate::disk::error::DiskError;
    use crate::store_api::CompletePart;
    use rustfs_filemeta::ErasureInfo;
    use std::collections::HashMap;
    use time::OffsetDateTime;

    #[test]
    fn test_check_part_constants() {
        // Test that all CHECK_PART constants have expected values
        assert_eq!(CHECK_PART_UNKNOWN, 0);
        assert_eq!(CHECK_PART_SUCCESS, 1);
        assert_eq!(CHECK_PART_FILE_NOT_FOUND, 4); // 实际值是 4，不是 2
        assert_eq!(CHECK_PART_VOLUME_NOT_FOUND, 3);
        assert_eq!(CHECK_PART_FILE_CORRUPT, 5);
    }

    #[test]
    fn test_is_min_allowed_part_size() {
        // Test minimum part size validation
        assert!(!is_min_allowed_part_size(0));
        assert!(!is_min_allowed_part_size(1024)); // 1KB - too small
        assert!(!is_min_allowed_part_size(1024 * 1024)); // 1MB - too small
        assert!(is_min_allowed_part_size(5 * 1024 * 1024)); // 5MB - minimum allowed
        assert!(is_min_allowed_part_size(10 * 1024 * 1024)); // 10MB - allowed
        assert!(is_min_allowed_part_size(100 * 1024 * 1024)); // 100MB - allowed
    }

    #[test]
    fn test_get_complete_multipart_md5() {
        // Test MD5 calculation for multipart upload
        let parts = vec![
            CompletePart {
                part_num: 1,
                etag: Some("d41d8cd98f00b204e9800998ecf8427e".to_string()),
            },
            CompletePart {
                part_num: 2,
                etag: Some("098f6bcd4621d373cade4e832627b4f6".to_string()),
            },
        ];

        let md5 = get_complete_multipart_md5(&parts);
        assert!(md5.ends_with("-2")); // Should end with part count
        assert!(md5.len() > 10); // Should have reasonable length

        // Test with empty parts
        let empty_parts = vec![];
        let empty_result = get_complete_multipart_md5(&empty_parts);
        assert!(empty_result.ends_with("-0"));

        // Test with single part
        let single_part = vec![CompletePart {
            part_num: 1,
            etag: Some("d41d8cd98f00b204e9800998ecf8427e".to_string()),
        }];
        let single_result = get_complete_multipart_md5(&single_part);
        assert!(single_result.ends_with("-1"));
    }

    #[test]
    fn test_get_upload_id_dir() {
        // Test upload ID directory path generation
        let dir = SetDisks::get_upload_id_dir("bucket", "object", "upload-id");
        // The function returns SHA256 hash of bucket/object + upload_id processing
        assert!(dir.len() > 64); // Should be longer than just SHA256 hash
        assert!(dir.contains("/")); // Should contain path separator

        // Test with base64 encoded upload ID
        let result2 = SetDisks::get_upload_id_dir("bucket", "object", "dXBsb2FkLWlk"); // base64 for "upload-id"
        assert!(!result2.is_empty());
        assert!(result2.len() > 10);
    }

    #[test]
    fn test_get_multipart_sha_dir() {
        // Test multipart SHA directory path generation
        let dir = SetDisks::get_multipart_sha_dir("bucket", "object");
        // The function returns SHA256 hash of "bucket/object"
        assert_eq!(dir.len(), 64); // SHA256 hash length
        assert!(!dir.contains("bucket")); // Should be hash, not original text
        assert!(!dir.contains("object")); // Should be hash, not original text

        // Test with empty strings
        let result2 = SetDisks::get_multipart_sha_dir("", "");
        assert!(!result2.is_empty());
        assert_eq!(result2.len(), 64); // SHA256 hex string length

        // Test that different inputs produce different hashes
        let result3 = SetDisks::get_multipart_sha_dir("bucket1", "object1");
        let result4 = SetDisks::get_multipart_sha_dir("bucket2", "object2");
        assert_ne!(result3, result4);
    }

    #[test]
    fn test_common_parity() {
        // Test common parity calculation
        // For parities [2, 2, 2, 3] with n=4, default_parity_count=1:
        // - parity=2: read_quorum = 4-2 = 2, occ=3 >= 2, so valid
        // - parity=3: read_quorum = 4-3 = 1, occ=1 >= 1, so valid
        // - max_occ=3 for parity=2, so returns 2
        let parities = vec![2, 2, 2, 3];
        assert_eq!(SetDisks::common_parity(&parities, 1), 2);

        // For parities [1, 2, 3] with n=3, default_parity_count=2:
        // - parity=1: read_quorum = 3-1 = 2, occ=1 < 2, so invalid
        // - parity=2: read_quorum = 3-2 = 1, occ=1 >= 1, so valid
        // - parity=3: read_quorum = 3-3 = 0, occ=1 >= 0, so valid
        // - max_occ=1, both parity=2 and parity=3 have same occurrence
        // - HashMap iteration order is not guaranteed, so result could be either 2 or 3
        let parities = vec![1, 2, 3];
        let result = SetDisks::common_parity(&parities, 2);
        assert!(result == 2 || result == 3); // Either 2 or 3 is valid

        let empty_parities = vec![];
        assert_eq!(SetDisks::common_parity(&empty_parities, 3), -1); // Empty returns -1

        let invalid_parities = vec![-1, -1, -1];
        assert_eq!(SetDisks::common_parity(&invalid_parities, 2), -1); // all invalid

        let single_parity = vec![4];
        assert_eq!(SetDisks::common_parity(&single_parity, 1), 4);

        // Test with -1 values (ignored)
        let parities_with_invalid = vec![-1, 2, 2, -1];
        assert_eq!(SetDisks::common_parity(&parities_with_invalid, 1), 2);
    }

    #[test]
    fn test_common_time() {
        // Test common time calculation
        let now = OffsetDateTime::now_utc();
        let later = now + Duration::from_secs(60);

        let times = vec![Some(now), Some(now), Some(later)];
        assert_eq!(SetDisks::common_time(&times, 2), Some(now));

        let times2 = vec![Some(now), Some(later), Some(later)];
        assert_eq!(SetDisks::common_time(&times2, 2), Some(later));

        let times_with_none = vec![Some(now), None, Some(now)];
        assert_eq!(SetDisks::common_time(&times_with_none, 2), Some(now));

        let times = vec![None, None, None];
        assert_eq!(SetDisks::common_time(&times, 2), None);

        let empty_times = vec![];
        assert_eq!(SetDisks::common_time(&empty_times, 1), None);
    }

    #[test]
    fn test_common_time_and_occurrence() {
        // Test common time with occurrence count
        let now = OffsetDateTime::now_utc();
        let times = vec![Some(now), Some(now), None];
        let (time, count) = SetDisks::common_time_and_occurrence(&times);
        assert_eq!(time, Some(now));
        assert_eq!(count, 2);

        let times = vec![None, None, None];
        let (time, count) = SetDisks::common_time_and_occurrence(&times);
        assert_eq!(time, None);
        assert_eq!(count, 0); // No valid times, so count is 0
    }

    #[test]
    fn test_common_etag() {
        // Test common etag calculation
        let etags = vec![Some("etag1".to_string()), Some("etag1".to_string()), None];
        assert_eq!(SetDisks::common_etag(&etags, 2), Some("etag1".to_string()));

        let etags = vec![None, None, None];
        assert_eq!(SetDisks::common_etag(&etags, 2), None);
    }

    #[test]
    fn test_common_etags() {
        // Test common etags with occurrence count
        let etags = vec![Some("etag1".to_string()), Some("etag1".to_string()), None];
        let (etag, count) = SetDisks::common_etags(&etags);
        assert_eq!(etag, Some("etag1".to_string()));
        assert_eq!(count, 2);
    }

    #[test]
    fn test_list_object_modtimes() {
        // Test extracting modification times from file info
        let now = OffsetDateTime::now_utc();
        let file_info = FileInfo {
            mod_time: Some(now),
            ..Default::default()
        };
        let parts_metadata = vec![file_info];
        let errs = vec![None];

        let modtimes = SetDisks::list_object_modtimes(&parts_metadata, &errs);
        assert_eq!(modtimes.len(), 1);
        assert_eq!(modtimes[0], Some(now));
    }

    #[test]
    fn test_list_object_etags() {
        // Test extracting etags from file info metadata
        let mut metadata = HashMap::new();
        metadata.insert("etag".to_string(), "test-etag".to_string());

        let file_info = FileInfo {
            metadata,
            ..Default::default()
        };
        let parts_metadata = vec![file_info];
        let errs = vec![None];

        let etags = SetDisks::list_object_etags(&parts_metadata, &errs);
        assert_eq!(etags.len(), 1);
        assert_eq!(etags[0], Some("test-etag".to_string()));
    }

    #[test]
    fn test_list_object_parities() {
        // Test extracting parity counts from file info
        let file_info1 = FileInfo {
            erasure: ErasureInfo {
                data_blocks: 4,
                parity_blocks: 2,
                index: 1,                             // Must be > 0 for is_valid() to return true
                distribution: vec![1, 2, 3, 4, 5, 6], // Must match data_blocks + parity_blocks
                ..Default::default()
            },
            size: 100, // Non-zero size
            deleted: false,
            ..Default::default()
        };
        let file_info2 = FileInfo {
            erasure: ErasureInfo {
                data_blocks: 6,
                parity_blocks: 3,
                index: 1,                                      // Must be > 0 for is_valid() to return true
                distribution: vec![1, 2, 3, 4, 5, 6, 7, 8, 9], // Must match data_blocks + parity_blocks
                ..Default::default()
            },
            size: 200, // Non-zero size
            deleted: false,
            ..Default::default()
        };
        let file_info3 = FileInfo {
            erasure: ErasureInfo {
                data_blocks: 2,
                parity_blocks: 1,
                index: 1,                    // Must be > 0 for is_valid() to return true
                distribution: vec![1, 2, 3], // Must match data_blocks + parity_blocks
                ..Default::default()
            },
            size: 0, // Zero size - function returns half of total shards
            deleted: false,
            ..Default::default()
        };

        let parts_metadata = vec![file_info1, file_info2, file_info3];
        let errs = vec![None, None, None];

        let parities = SetDisks::list_object_parities(&parts_metadata, &errs);
        assert_eq!(parities.len(), 3);
        assert_eq!(parities[0], 2); // parity_blocks from first file
        assert_eq!(parities[1], 3); // parity_blocks from second file
        assert_eq!(parities[2], 1); // half of total shards (3/2 = 1) for zero size file
    }

    #[test]
    fn test_conv_part_err_to_int() {
        // Test error conversion to integer codes
        assert_eq!(conv_part_err_to_int(&None), CHECK_PART_SUCCESS);

        let disk_err = DiskError::FileNotFound;
        assert_eq!(conv_part_err_to_int(&Some(disk_err)), CHECK_PART_FILE_NOT_FOUND);

        let other_err = DiskError::other("other error");
        assert_eq!(conv_part_err_to_int(&Some(other_err)), CHECK_PART_UNKNOWN); // other 错误应该返回 UNKNOWN，不是 SUCCESS
    }

    #[test]
    fn test_has_part_err() {
        // Test checking for part errors
        let no_errors = vec![CHECK_PART_SUCCESS, CHECK_PART_SUCCESS];
        assert!(!has_part_err(&no_errors));

        let with_errors = vec![CHECK_PART_SUCCESS, CHECK_PART_FILE_NOT_FOUND];
        assert!(has_part_err(&with_errors));

        let unknown_errors = vec![CHECK_PART_UNKNOWN, CHECK_PART_SUCCESS];
        assert!(has_part_err(&unknown_errors));
    }

    #[test]
    fn test_should_heal_object_on_disk() {
        // Test healing decision logic
        let meta = FileInfo::default();
        let latest_meta = FileInfo::default();

        // Test with file not found error
        let err = Some(DiskError::FileNotFound);
        let (should_heal, _) = should_heal_object_on_disk(&err, &[], &meta, &latest_meta);
        assert!(should_heal);

        // Test with no error and no part errors
        let (should_heal, _) = should_heal_object_on_disk(&None, &[CHECK_PART_SUCCESS], &meta, &latest_meta);
        assert!(!should_heal);

        // Test with part corruption
        let (should_heal, _) = should_heal_object_on_disk(&None, &[CHECK_PART_FILE_CORRUPT], &meta, &latest_meta);
        assert!(should_heal);
    }

    #[test]
    fn test_dang_ling_meta_errs_count() {
        // Test counting dangling metadata errors
        let errs = vec![None, Some(DiskError::FileNotFound), None];
        let (not_found_count, non_actionable_count) = dang_ling_meta_errs_count(&errs);
        assert_eq!(not_found_count, 1); // One FileNotFound error
        assert_eq!(non_actionable_count, 0); // No other errors
    }

    #[test]
    fn test_dang_ling_part_errs_count() {
        // Test counting dangling part errors
        let results = vec![CHECK_PART_SUCCESS, CHECK_PART_FILE_NOT_FOUND, CHECK_PART_SUCCESS];
        let (not_found_count, non_actionable_count) = dang_ling_part_errs_count(&results);
        assert_eq!(not_found_count, 1); // One FILE_NOT_FOUND error
        assert_eq!(non_actionable_count, 0); // No other errors
    }

    #[test]
    fn test_is_object_dir_dang_ling() {
        // Test object directory dangling detection
        let errs = vec![Some(DiskError::FileNotFound), Some(DiskError::FileNotFound), None];
        assert!(is_object_dir_dang_ling(&errs));
        let errs2 = vec![None, None, None];
        assert!(!is_object_dir_dang_ling(&errs2));

        let errs3 = vec![Some(DiskError::FileCorrupt), Some(DiskError::FileNotFound)];
        assert!(!is_object_dir_dang_ling(&errs3)); // Mixed errors, not all not found
    }

    #[test]
    fn test_join_errs() {
        // Test joining error messages
        let errs = vec![None, Some(DiskError::other("error1")), Some(DiskError::other("error2"))];
        let joined = join_errs(&errs);
        assert!(joined.contains("<nil>"));
        assert!(joined.contains("io error")); // DiskError::other 显示为 "io error"

        // Test with different error types
        let errs2 = vec![None, Some(DiskError::FileNotFound), Some(DiskError::FileCorrupt)];
        let joined2 = join_errs(&errs2);
        assert!(joined2.contains("<nil>"));
        assert!(joined2.contains("file not found"));
        assert!(joined2.contains("file is corrupted"));
    }

    #[test]
    fn test_reduce_common_data_dir() {
        // Test reducing common data directory
        use uuid::Uuid;

        let uuid1 = Uuid::new_v4();
        let uuid2 = Uuid::new_v4();

        let data_dirs = vec![Some(uuid1), Some(uuid1), Some(uuid2)];
        let result = SetDisks::reduce_common_data_dir(&data_dirs, 2);
        assert_eq!(result, Some(uuid1)); // uuid1 appears twice, meets quorum

        let data_dirs = vec![Some(uuid1), Some(uuid2), None];
        let result = SetDisks::reduce_common_data_dir(&data_dirs, 2);
        assert_eq!(result, None); // No UUID meets quorum of 2
    }

    #[test]
    fn test_shuffle_parts_metadata() {
        // Test metadata shuffling
        let metadata = vec![
            FileInfo {
                name: "file1".to_string(),
                ..Default::default()
            },
            FileInfo {
                name: "file2".to_string(),
                ..Default::default()
            },
            FileInfo {
                name: "file3".to_string(),
                ..Default::default()
            },
        ];

        // Distribution uses 1-based indexing
        let distribution = vec![3, 1, 2]; // 1-based shuffle order
        let result = SetDisks::shuffle_parts_metadata(&metadata, &distribution);

        assert_eq!(result.len(), 3);
        assert_eq!(result[0].name, "file2"); // distribution[1] = 1, so metadata[1] goes to index 0
        assert_eq!(result[1].name, "file3"); // distribution[2] = 2, so metadata[2] goes to index 1
        assert_eq!(result[2].name, "file1"); // distribution[0] = 3, so metadata[0] goes to index 2

        // Test with empty distribution
        let empty_distribution = vec![];
        let result2 = SetDisks::shuffle_parts_metadata(&metadata, &empty_distribution);
        assert_eq!(result2.len(), 3);
        assert_eq!(result2[0].name, "file1"); // Should return original order
    }

    #[test]
    fn test_shuffle_disks() {
        // Test disk shuffling
        let disks = vec![None, None, None]; // Mock disks
        let distribution = vec![3, 1, 2]; // 1-based indexing

        let result = SetDisks::shuffle_disks(&disks, &distribution);
        assert_eq!(result.len(), 3);
        // All disks are None, so result should be all None
        assert!(result.iter().all(|d| d.is_none()));

        // Test with empty distribution
        let empty_distribution = vec![];
        let result2 = SetDisks::shuffle_disks(&disks, &empty_distribution);
        assert_eq!(result2.len(), 3);
        assert!(result2.iter().all(|d| d.is_none()));
    }
}