Patch by Sean Bartell:

* SuperBlock: In case of ReiserFS 3.6 we were stil loading only the old
  superblock format.
* Added support for ReiserFS labels (volume names).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36132 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/reiserfs/SuperBlock.cpp

@@ -109,7 +109,7 @@ PRINT(("SuperBlock: ReiserFS 3.5\n"));
 		fFormatVersion = REISERFS_3_5;
 	// try new version and new layout
 	} else if (read_super_block(device, REISERFS_DISK_OFFSET_IN_BYTES + offset,
-			REISER2FS_SUPER_MAGIC_STRING, &fOldData) == B_OK) {
+			REISER2FS_SUPER_MAGIC_STRING, &fCurrentData) == B_OK) {
 PRINT(("SuperBlock: ReiserFS 3.6\n"));
 		fFormatVersion = REISERFS_3_6;
 	// failure
@@ -119,3 +119,16 @@ PRINT(("SuperBlock: ReiserFS 3.6\n"));
 	return error;
 }
 
+
+// GetLabel
+status_t
+SuperBlock::GetLabel(char* buffer, size_t bufferSize) const
+{
+	if (GetFormatVersion() == REISERFS_3_6 && fCurrentData->s_label[0]) {
+		size_t len = MIN(sizeof(fCurrentData->s_label), bufferSize - 1);
+		memcpy(buffer, fCurrentData->s_label, len);
+		buffer[len] = '\0';
+		return B_OK;
+	}
+	return B_ENTRY_NOT_FOUND;
+}

src/add-ons/kernel/file_systems/reiserfs/SuperBlock.h

@@ -85,6 +85,8 @@ public:
 			: le2h(fOldData->s_tree_height));
 	}
 
+	status_t GetLabel(char* buffer, size_t bufferSize) const;
+
 private:
 	uint32	fFormatVersion;
 	union {

src/add-ons/kernel/file_systems/reiserfs/Volume.cpp

@@ -262,10 +262,12 @@ Volume::GetName() const
 void
 Volume::UpdateName(partition_id partitionID)
 {
+	if (fSuperBlock->GetLabel(fVolumeName, sizeof(fVolumeName)) == B_OK)
+		return;
 	if (get_default_partition_content_name(partitionID, "ReiserFS",
-			fVolumeName, sizeof(fVolumeName)) != B_OK) {
-		strlcpy(fVolumeName, "ReiserFS Volume", sizeof(fVolumeName));
-	}
+			fVolumeName, sizeof(fVolumeName)) == B_OK)
+		return;
+	strlcpy(fVolumeName, "ReiserFS Volume", sizeof(fVolumeName));
 }
 
 

src/add-ons/kernel/file_systems/reiserfs/reiserfs.h

@@ -272,7 +272,14 @@ struct reiserfs_super_block
                                    superblock. -Hans */
   uint16 s_reserved;
   uint32 s_inode_generation;
-  char s_unused[124] ;			/* zero filled by mkreiserfs */
+  uint32 s_flags;
+  char s_uuid[16];
+  char s_label[16];
+  uint16 s_mnt_count;
+  uint16 s_max_mnt_count;
+  uint32 s_lastcheck;
+  uint32 s_check_interval;
+  char s_unused[76] ;			/* zero filled by mkreiserfs */
 } _PACKED;
 
 #define SB_SIZE (sizeof(struct reiserfs_super_block))