frostfs-node/pkg/local_object_storage/engine/exists.go

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package engine
import (
"context"
"errors"
"sync/atomic"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"golang.org/x/sync/errgroup"
)
func (e *StorageEngine) exists(ctx context.Context, addr oid.Address) (bool, error) {
var shPrm shard.ExistsPrm
shPrm.SetAddress(addr)
var exists atomic.Bool
eg, egCtx := errgroup.WithContext(ctx)
egCtx, cancel := context.WithCancel(egCtx)
defer cancel()
e.iterateOverSortedShards(addr, func(_ int, sh hashedShard) (stop bool) {
select {
case <-egCtx.Done():
return true
default:
}
eg.Go(func() error {
res, err := sh.Exists(egCtx, shPrm)
if err != nil {
if errors.Is(err, context.Canceled) {
return err
}
if client.IsErrObjectAlreadyRemoved(err) {
return err
}
var siErr *objectSDK.SplitInfoError
if errors.As(err, &siErr) {
return err
}
if shard.IsErrObjectExpired(err) {
return err
}
if !client.IsErrObjectNotFound(err) {
e.reportShardError(sh, "could not check existence of object in shard", err)
}
return nil
}
if res.Exists() {
exists.Store(true)
cancel()
}
return nil
})
return false
})
err := eg.Wait()
if client.IsErrObjectAlreadyRemoved(err) {
return false, new(apistatus.ObjectAlreadyRemoved)
}
return exists.Load(), nil
}