pkg/local_object_storage/blobstor/fstree/counter.go

@@ -1,22 +1,23 @@
 package fstree
 
 import (
-	"math"
 	"sync/atomic"
 )
 
 // FileCounter used to count files in FSTree. The implementation must be thread-safe.
 type FileCounter interface {
-	Set(v uint64)
-	Inc()
-	Dec()
+	Set(count, size int64)
+	Inc(size int64)
+	Dec(size int64)
+	Value() (int64, int64)
 }
 
 type noopCounter struct{}
 
-func (c *noopCounter) Set(uint64) {}
-func (c *noopCounter) Inc()       {}
-func (c *noopCounter) Dec()       {}
+func (c *noopCounter) Set(int64, int64)      {}
+func (c *noopCounter) Inc(int64)             {}
+func (c *noopCounter) Dec(int64)             {}
+func (c *noopCounter) Value() (int64, int64) { return 0, 0 }
 
 func counterEnabled(c FileCounter) bool {
 	_, noop := c.(*noopCounter)
@@ -24,14 +25,29 @@ func counterEnabled(c FileCounter) bool {
 }
 
 type SimpleCounter struct {
-	v atomic.Uint64
+	count atomic.Int64
+	size  atomic.Int64
 }
 
 func NewSimpleCounter() *SimpleCounter {
 	return &SimpleCounter{}
 }
 
-func (c *SimpleCounter) Set(v uint64)  { c.v.Store(v) }
-func (c *SimpleCounter) Inc()          { c.v.Add(1) }
-func (c *SimpleCounter) Dec()          { c.v.Add(math.MaxUint64) }
-func (c *SimpleCounter) Value() uint64 { return c.v.Load() }
+func (c *SimpleCounter) Set(count, size int64) {
+	c.count.Store(count)
+	c.size.Store(size)
+}
+
+func (c *SimpleCounter) Inc(size int64) {
+	c.count.Add(1)
+	c.size.Add(size)
+}
+
+func (c *SimpleCounter) Dec(size int64) {
+	c.count.Add(-1)
+	c.size.Add(-size)
+}
+
+func (c *SimpleCounter) Value() (int64, int64) {
+	return c.count.Load(), c.size.Load()
+}

pkg/local_object_storage/blobstor/fstree/fstree.go

@@ -435,32 +435,38 @@ func (t *FSTree) initFileCounter() error {
 		return nil
 	}
 
-	counter, err := t.countFiles()
+	count, size, err := t.countFiles()
 	if err != nil {
 		return err
 	}
-	t.fileCounter.Set(counter)
+	t.fileCounter.Set(count, size)
 	return nil
 }
 
-func (t *FSTree) countFiles() (uint64, error) {
-	var counter uint64
+func (t *FSTree) countFiles() (int64, int64, error) {
+	var count int64
+	var size int64
 	// it is simpler to just consider every file
 	// that is not directory as an object
 	err := filepath.WalkDir(t.RootPath,
 		func(_ string, d fs.DirEntry, _ error) error {
 			if !d.IsDir() {
-				counter++
+				count++
+				fi, err := d.Info()
+				if err != nil {
+					return err
+				}
+				size += fi.Size()
 			}
 
 			return nil
 		},
 	)
 	if err != nil {
-		return 0, fmt.Errorf("could not walk through %s directory: %w", t.RootPath, err)
+		return 0, 0, fmt.Errorf("could not walk through %s directory: %w", t.RootPath, err)
 	}
 
-	return counter, nil
+	return count, size, nil
 }
 
 func (t *FSTree) ObjectsCount(ctx context.Context) (uint64, error) {

pkg/local_object_storage/blobstor/fstree/fstree_test.go

@@ -47,8 +47,9 @@ func TestObjectCounter(t *testing.T) {
 	require.NoError(t, fst.Open(mode.ComponentReadWrite))
 	require.NoError(t, fst.Init())
 
-	counterValue := counter.Value()
-	require.Equal(t, uint64(0), counterValue)
+	counterValue, sizeValue := counter.Value()
+	require.Equal(t, int64(0), counterValue)
+	require.Equal(t, int64(0), sizeValue)
 
 	defer func() {
 		require.NoError(t, fst.Close())
@@ -64,9 +65,6 @@ func TestObjectCounter(t *testing.T) {
 	putPrm.Address = addr
 	putPrm.RawData, _ = obj.Marshal()
 
-	var getPrm common.GetPrm
-	getPrm.Address = putPrm.Address
-
 	var delPrm common.DeletePrm
 	delPrm.Address = addr
 
@@ -95,8 +93,9 @@ func TestObjectCounter(t *testing.T) {
 
 	require.NoError(t, eg.Wait())
 
-	counterValue = counter.Value()
-	realCount, err := fst.countFiles()
+	counterValue, sizeValue = counter.Value()
+	realCount, realSize, err := fst.countFiles()
 	require.NoError(t, err)
 	require.Equal(t, realCount, counterValue)
+	require.Equal(t, realSize, sizeValue)
 }

pkg/local_object_storage/blobstor/fstree/fstree_write_generic.go

@@ -78,14 +78,15 @@ func (w *genericWriter) writeAndRename(tmpPath, p string, data []byte) error {
 	}
 
 	if w.fileCounterEnabled {
-		w.fileCounter.Inc()
+		w.fileCounter.Inc(int64(len(data)))
 		var targetFileExists bool
-		if _, e := os.Stat(p); e == nil {
+		s, e := os.Stat(p)
+		if e == nil {
 			targetFileExists = true
 		}
 		err = os.Rename(tmpPath, p)
 		if err == nil && targetFileExists {
-			w.fileCounter.Dec()
+			w.fileCounter.Dec(int64(s.Size()))
 		}
 	} else {
 		err = os.Rename(tmpPath, p)
@@ -108,20 +109,31 @@ func (w *genericWriter) writeFile(p string, data []byte) error {
 }
 
 func (w *genericWriter) removeFile(p string) error {
-	var err error
 	if w.fileCounterEnabled {
-		w.fileGuard.Lock(p)
-		err = os.Remove(p)
-		w.fileGuard.Unlock(p)
-		if err == nil {
-			w.fileCounter.Dec()
-		}
-	} else {
-		err = os.Remove(p)
+		return w.removeFileWithCounter(p)
 	}
 
+	err := os.Remove(p)
 	if err != nil && os.IsNotExist(err) {
 		err = logicerr.Wrap(new(apistatus.ObjectNotFound))
 	}
 	return err
 }
+
+func (w *genericWriter) removeFileWithCounter(p string) error {
+	w.fileGuard.Lock(p)
+	defer w.fileGuard.Unlock(p)
+
+	s, err := os.Stat(p)
+	if err != nil && os.IsNotExist(err) {
+		return logicerr.Wrap(new(apistatus.ObjectNotFound))
+	}
+	if err != nil {
+		return err
+	}
+	err = os.Remove(p)
+	if err == nil {
+		w.fileCounter.Dec(s.Size())
+	}
+	return err
+}

pkg/local_object_storage/blobstor/fstree/fstree_write_linux.go

@@ -18,7 +18,8 @@ type linuxWriter struct {
 	perm  uint32
 	flags int
 
-	counter FileCounter
+	counter        FileCounter
+	counterEnabled bool
 }
 
 func newSpecificWriteData(c FileCounter, root string, perm fs.FileMode, noSync bool) writer {
@@ -34,10 +35,11 @@ func newSpecificWriteData(c FileCounter, root string, perm fs.FileMode, noSync b
 	}
 	_ = unix.Close(fd) // Don't care about error.
 	w := &linuxWriter{
-		root:    root,
-		perm:    uint32(perm),
-		flags:   flags,
-		counter: c,
+		root:           root,
+		perm:           uint32(perm),
+		flags:          flags,
+		counter:        c,
+		counterEnabled: counterEnabled(c),
 	}
 	return w
 }
@@ -61,7 +63,7 @@ func (w *linuxWriter) writeFile(p string, data []byte) error {
 		if n == len(data) {
 			err = unix.Linkat(unix.AT_FDCWD, tmpPath, unix.AT_FDCWD, p, unix.AT_SYMLINK_FOLLOW)
 			if err == nil {
-				w.counter.Inc()
+				w.counter.Inc(int64(len(data)))
 			}
 			if errors.Is(err, unix.EEXIST) {
 				err = nil
@@ -78,12 +80,22 @@ func (w *linuxWriter) writeFile(p string, data []byte) error {
 }
 
 func (w *linuxWriter) removeFile(p string) error {
+	var s unix.Stat_t
+	if w.counterEnabled {
+		err := unix.Stat(p, &s)
+		if err != nil && err == unix.ENOENT {
+			return logicerr.Wrap(new(apistatus.ObjectNotFound))
+		}
+		if err != nil {
+			return err
+		}
+	}
 	err := unix.Unlink(p)
 	if err != nil && err == unix.ENOENT {
 		return logicerr.Wrap(new(apistatus.ObjectNotFound))
 	}
 	if err == nil {
-		w.counter.Dec()
+		w.counter.Dec(s.Size)
 	}
 	return err
 }

pkg/local_object_storage/writecache/cache.go

@@ -57,6 +57,7 @@ func New(opts ...Option) Cache {
 			maxCacheSize:  defaultMaxCacheSize,
 			openFile:      os.OpenFile,
 			metrics:       DefaultMetrics(),
+			counter:       fstree.NewSimpleCounter(),
 		},
 	}
 
@@ -91,7 +92,7 @@ func (c *cache) Open(_ context.Context, mod mode.Mode) error {
 		return metaerr.Wrap(err)
 	}
 
-	_ = c.estimateCacheSize()
+	c.estimateCacheSize()
 	return nil
 }
 

pkg/local_object_storage/writecache/options.go

@@ -4,6 +4,7 @@ import (
 	"io/fs"
 	"os"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	"go.uber.org/zap"
 )
@@ -26,8 +27,8 @@ type options struct {
 	// maxCacheSize is the maximum total size of all objects saved in cache.
 	// 1 GiB by default.
 	maxCacheSize uint64
-	// objCounters contains atomic counters for the number of objects stored in cache.
-	objCounters counters
+	// counter contains atomic counters for the number of objects stored in cache.
+	counter *fstree.SimpleCounter
 	// noSync is true iff FSTree allows unsynchronized writes.
 	noSync bool
 	// reportError is the function called when encountering disk errors in background workers.

pkg/local_object_storage/writecache/put.go

@@ -60,8 +60,11 @@ func (c *cache) Put(ctx context.Context, prm common.PutPrm) (common.PutRes, erro
 // putBig writes object to FSTree and pushes it to the flush workers queue.
 func (c *cache) putBig(ctx context.Context, prm common.PutPrm) error {
 	addr := prm.Address.EncodeToString()
-	cacheSz := c.estimateCacheSize()
-	if c.maxCacheSize < c.incSizeFS(cacheSz) {
+	estimatedObjSize := uint64(len(prm.RawData))
+	if estimatedObjSize == 0 {
+		estimatedObjSize = prm.Object.PayloadSize()
+	}
+	if !c.hasFreeSpace(estimatedObjSize) {
 		return ErrOutOfSpace
 	}
 

pkg/local_object_storage/writecache/state.go

@@ -1,48 +1,19 @@
 package writecache
 
-import (
-	"math"
-	"sync/atomic"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
-)
-
-func (c *cache) estimateCacheSize() uint64 {
-	fsCount := c.objCounters.FS()
-	if fsCount > 0 {
-		fsCount-- // db file
+func (c *cache) estimateCacheSize() {
+	count, size := c.counter.Value()
+	var ucount, usize uint64
+	if count > 0 {
+		ucount = uint64(count)
 	}
-	fsSize := fsCount * c.maxObjectSize
-	c.metrics.SetEstimateSize(fsSize)
-	c.metrics.SetActualCounters(fsCount)
-	return fsSize
+	if size > 0 {
+		usize = uint64(size)
+	}
+	c.metrics.SetEstimateSize(ucount)
+	c.metrics.SetActualCounters(usize)
 }
 
-func (c *cache) incSizeFS(sz uint64) uint64 {
-	return sz + c.maxObjectSize
-}
-
-var _ fstree.FileCounter = &counters{}
-
-type counters struct {
-	cFS atomic.Uint64
-}
-
-func (x *counters) FS() uint64 {
-	return x.cFS.Load()
-}
-
-// Set implements fstree.ObjectCounter.
-func (x *counters) Set(v uint64) {
-	x.cFS.Store(v)
-}
-
-// Inc implements fstree.ObjectCounter.
-func (x *counters) Inc() {
-	x.cFS.Add(1)
-}
-
-// Dec implements fstree.ObjectCounter.
-func (x *counters) Dec() {
-	x.cFS.Add(math.MaxUint64)
+func (c *cache) hasFreeSpace(sz uint64) bool {
+	_, size := c.counter.Value()
+	return size+int64(sz) <= int64(c.maxCacheSize)
 }

pkg/local_object_storage/writecache/storage.go

@@ -28,7 +28,7 @@ func (c *cache) openStore(mod mode.ComponentMode) error {
 		fstree.WithDepth(1),
 		fstree.WithDirNameLen(1),
 		fstree.WithNoSync(c.noSync),
-		fstree.WithFileCounter(&c.objCounters),
+		fstree.WithFileCounter(c.counter),
 	)
 	if err := c.fsTree.Open(mod); err != nil {
 		return fmt.Errorf("could not open FSTree: %w", err)