1 /* 2 ** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 3 ** Distributed under the terms of the MIT License. 4 */ 5 #ifndef VOLUME_H 6 #define VOLUME_H 7 8 9 #include <SupportDefs.h> 10 11 namespace boot { 12 class Partition; 13 } 14 15 16 #include "bfs.h" 17 18 namespace BFS { 19 20 class Directory; 21 22 class Volume { 23 public: 24 Volume(boot::Partition *partition); 25 ~Volume(); 26 27 status_t InitCheck(); 28 bool IsValidSuperBlock(); 29 30 block_run Root() const { return fSuperBlock.root_dir; } 31 Directory *RootNode() const { return fRootNode; } 32 block_run Indices() const { return fSuperBlock.indices; } 33 const char *Name() const { return fSuperBlock.name; } 34 35 int Device() const { return fDevice; } 36 37 off_t NumBlocks() const { return fSuperBlock.NumBlocks(); } 38 off_t UsedBlocks() const { return fSuperBlock.UsedBlocks(); } 39 off_t FreeBlocks() const { return NumBlocks() - UsedBlocks(); } 40 41 uint32 BlockSize() const { return fSuperBlock.BlockSize(); } 42 uint32 BlockShift() const { return fSuperBlock.BlockShift(); } 43 uint32 InodeSize() const { return fSuperBlock.InodeSize(); } 44 uint32 AllocationGroups() const { return fSuperBlock.AllocationGroups(); } 45 uint32 AllocationGroupShift() const { return fSuperBlock.AllocationGroupShift(); } 46 disk_super_block &SuperBlock() { return fSuperBlock; } 47 48 off_t ToOffset(block_run run) const { return ToBlock(run) << BlockShift(); } 49 off_t ToOffset(off_t block) const { return block << BlockShift(); } 50 off_t ToBlock(block_run run) const { return ((off_t)run.AllocationGroup() << AllocationGroupShift()) | (uint32)run.Start(); } 51 block_run ToBlockRun(off_t block) const; 52 status_t ValidateBlockRun(block_run run); 53 54 off_t ToVnode(block_run run) const { return ToBlock(run); } 55 off_t ToVnode(off_t block) const { return block; } 56 57 protected: 58 int fDevice; 59 disk_super_block fSuperBlock; 60 61 BFS::Directory *fRootNode; 62 }; 63 64 } // namespace BFS 65 66 #endif /* VOLUME_H */ 67