| 31 | } |
| 32 | |
| 33 | Ext2Volume::Ext2Volume(PartitionDevice* part, const char* name){ |
| 34 | this->part = part; |
| 35 | |
| 36 | if(part->ReadBlock(EXT2_SUPERBLOCK_LOCATION / part->parentDisk->blocksize, sizeof(ext2_superblock_t), &super)){ |
| 37 | Log::Error("[Ext2] Disk Error Initializing Volume"); |
| 38 | error = DiskReadError; |
| 39 | return; // Disk Error |
| 40 | } |
| 41 | |
| 42 | if(super.revLevel){ // If revision level >= 0 grab the extended superblock as well |
| 43 | if(part->ReadBlock(EXT2_SUPERBLOCK_LOCATION / part->parentDisk->blocksize, sizeof(ext2_superblock_t) + sizeof(ext2_superblock_extended_t), &super)){ |
| 44 | Log::Error("[Ext2] Disk Error Initializing Volume"); |
| 45 | error = DiskReadError; |
| 46 | return; // Disk Error |
| 47 | } |
| 48 | |
| 49 | if((superext.featuresIncompat & (~EXT2_INCOMPAT_FEATURE_SUPPORT)) != 0 || (superext.featuresRoCompat & (~EXT2_READONLY_FEATURE_SUPPORT)) != 0){ // Check support for incompatible/read-only compatible features |
| 50 | Log::Error("[Ext2] Incompatible Ext2 features present (Incompt: %x, Read-only Compt: %x). Will not mount volume.", superext.featuresIncompat, superext.featuresRoCompat); |
| 51 | error = IncompatibleError; |
| 52 | return; |
| 53 | } |
| 54 | |
| 55 | if(superext.featuresIncompat & IncompatibleFeatures::Filetype) filetype = true; |
| 56 | else filetype = false; |
| 57 | |
| 58 | if(superext.featuresRoCompat & ReadonlyFeatures::LargeFiles) largeFiles = true; |
| 59 | else largeFiles = false; |
| 60 | |
| 61 | if(superext.featuresRoCompat & ReadonlyFeatures::Sparse) sparse = true; |
| 62 | else sparse = false; |
| 63 | } else { |
| 64 | memset(&superext, 0, sizeof(ext2_superblock_extended_t)); |
| 65 | } |
| 66 | |
| 67 | blockGroupCount = (super.blockCount % super.blocksPerGroup) ? (super.blockCount / super.blocksPerGroup + 1) : (super.blockCount / super.blocksPerGroup); // Round up |
| 68 | uint32_t secondBlockGroupCount = (super.inodeCount % super.inodesPerGroup) ? (super.inodeCount / super.inodesPerGroup + 1) : (super.inodeCount / super.inodesPerGroup); // Round up |
| 69 | |
| 70 | if(blockGroupCount != secondBlockGroupCount){ |
| 71 | Log::Error("[Ext2] Block group count mismatch."); |
| 72 | error = MiscError; |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | blocksize = 1024U << super.logBlockSize; |
| 77 | superBlockIndex = LocationToBlock(EXT2_SUPERBLOCK_LOCATION); |
| 78 | |
| 79 | if(super.revLevel){ |
| 80 | inodeSize = superext.inodeSize; |
| 81 | } else { |
| 82 | inodeSize = 128; |
| 83 | } |
| 84 | |
| 85 | Log::Info("[Ext2] Initializing Volume\tRevision: %d, Block Size: %d, %d KB/%d KB used, Last mounted on: %s", super.revLevel, blocksize, super.freeBlockCount * blocksize / 1024, super.blockCount * blocksize / 1024, superext.lastMounted); |
| 86 | |
| 87 | if(debugLevelExt2 >= DebugLevelNormal){ |
| 88 | Log::Info("[Ext2] Block Group Count: %d, Inodes Per Block Group: %d, Inode Size: %d", blockGroupCount, super.inodesPerGroup, inodeSize); |
| 89 | Log::Info("[Ext2] Sparse Superblock? %s Large Files? %s, Filetype Extension? %s", (sparse ? "Yes" : "No"), (largeFiles ? "Yes" : "No"), (filetype ? "Yes" : "No")); |
| 90 | } |