[#189] blobstor: Implement DumpInfo method

Implement method to get the information about the BLOB storage.

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

pkg/local_object_storage/blobstor/blobstor.go

@@ -37,8 +37,10 @@ func defaultCfg() *cfg {
 		fsTree: fsTree{
 			depth:      defaultShallowDepth,
 			dirNameLen: hex.EncodedLen(dirNameLen),
-			perm:       defaultPerm,
-			rootDir:    "./",
+			Info: Info{
+				Permissions: defaultPerm,
+				RootPath:    "./",
+			},
 		},
 		compressor:   noOpCompressor,
 		decompressor: noOpDecompressor,
@@ -108,7 +110,7 @@ func WithCompressObjects(comp bool, log *logger.Logger) Option {
 // of the fs tree to write the objects.
 func WithTreeRootPath(rootDir string) Option {
 	return func(c *cfg) {
-		c.fsTree.rootDir = rootDir
+		c.fsTree.RootPath = rootDir
 	}
 }
 
@@ -116,6 +118,6 @@ func WithTreeRootPath(rootDir string) Option {
 // bits of the fs tree.
 func WithTreeRootPerm(perm os.FileMode) Option {
 	return func(c *cfg) {
-		c.fsTree.perm = perm
+		c.fsTree.Permissions = perm
 	}
 }

pkg/local_object_storage/blobstor/fstree.go

@@ -4,7 +4,6 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"errors"
-	"os"
 	"path"
 
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
@@ -15,9 +14,7 @@ type fsTree struct {
 
 	dirNameLen int
 
-	perm os.FileMode
-
-	rootDir string
+	Info
 }
 
 const dirNameLen = 1 // in bytes
@@ -36,7 +33,7 @@ func (t *fsTree) treePath(addr *objectSDK.Address) string {
 	sAddr := stringifyAddress(addr)
 
 	dirs := make([]string, 0, t.depth+1+1) // 1 for root, 1 for file
-	dirs = append(dirs, t.rootDir)
+	dirs = append(dirs, t.RootPath)
 
 	for i := 0; i < t.depth; i++ {
 		dirs = append(dirs, sAddr[:t.dirNameLen])

pkg/local_object_storage/blobstor/info.go

@@ -0,0 +1,19 @@
+package blobstor
+
+import (
+	"os"
+)
+
+// Info groups the information about BlobStor.
+type Info struct {
+	// Permission bits of the root directory.
+	Permissions os.FileMode
+
+	// Full path to the root directory.
+	RootPath string
+}
+
+// DumpInfo returns information about the BlobStor.
+func (b *BlobStor) DumpInfo() Info {
+	return b.fsTree.Info
+}

pkg/local_object_storage/blobstor/put.go

@@ -53,9 +53,9 @@ func (b *BlobStor) Put(prm *PutPrm) (*PutRes, error) {
 func (t *fsTree) put(addr *objectSDK.Address, data []byte) error {
 	p := t.treePath(addr)
 
-	if err := os.MkdirAll(path.Dir(p), t.perm); err != nil {
+	if err := os.MkdirAll(path.Dir(p), t.Permissions); err != nil {
 		return err
 	}
 
-	return ioutil.WriteFile(p, data, t.perm)
+	return ioutil.WriteFile(p, data, t.Permissions)
 }