[#216] blobovnicza: Add configuration values

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/local_object_storage/blobovnicza/blobovnicza.go

@@ -1,18 +1,53 @@
 package blobovnicza
 
+import (
+	"os"
+
+	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
+	"go.etcd.io/bbolt"
+	"go.uber.org/atomic"
+	"go.uber.org/zap"
+)
+
 // Blobovnicza represents the implementation of NeoFS Blobovnicza.
 type Blobovnicza struct {
 	*cfg
+
+	filled *atomic.Uint64
+
+	boltDB *bbolt.DB
 }
 
 // Option is an option of Blobovnicza's constructor.
 type Option func(*cfg)
 
 type cfg struct {
+	boltDBCfg
+
+	fullSizeLimit uint64
+
+	objSizeLimit uint64
+
+	log *logger.Logger
+}
+
+type boltDBCfg struct {
+	perm os.FileMode
+
+	path string
+
+	boltOptions *bbolt.Options
 }
 
 func defaultCfg() *cfg {
-	return &cfg{}
+	return &cfg{
+		boltDBCfg: boltDBCfg{
+			perm: os.ModePerm, // 0777
+		},
+		fullSizeLimit: 1 << 30, // 1GB
+		objSizeLimit:  1 << 20, // 1MB
+		log:           zap.L(),
+	}
 }
 
 // New creates and returns new Blobovnicza instance.
@@ -25,5 +60,51 @@ func New(opts ...Option) *Blobovnicza {
 
 	return &Blobovnicza{
 		cfg:    c,
+		filled: atomic.NewUint64(0),
+	}
+}
+
+// WithPath returns option to set system path to Blobovnicza.
+func WithPath(path string) Option {
+	return func(c *cfg) {
+		c.path = path
+	}
+}
+
+// WithPermissions returns option to specify permission bits
+// of Blobovnicza's system path.
+func WithPermissions(perm os.FileMode) Option {
+	return func(c *cfg) {
+		c.perm = perm
+	}
+}
+
+// WithSizeLimit returns option to specify maximum size
+// of the objects stored in Blobovnicza.
+func WithObjectSizeLimit(lim uint64) Option {
+	return func(c *cfg) {
+		c.objSizeLimit = lim
+	}
+}
+
+// WithFullSizeLimit returns option to set maximum sum size
+// of all stored objects.
+func WithFullSizeLimit(lim uint64) Option {
+	return func(c *cfg) {
+		c.fullSizeLimit = lim
+	}
+}
+
+// WithLogger returns option to specify Blobovnicza's logger.
+func WithLogger(l *logger.Logger) Option {
+	return func(c *cfg) {
+		c.log = l.With(zap.String("component", "Blobovnicza"))
+	}
+}
+
+// WithBoltDBOptions returns option to specify BoltDB options.
+func WithBoltDBOptions(opts *bbolt.Options) Option {
+	return func(c *cfg) {
+		c.boltOptions = opts
 	}
 }