/* $Id: xfsvfs.cpp $ */ /** @file * IPRT - XFS Virtual Filesystem. */ /* * Copyright (C) 2018-2019 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP RTLOGGROUP_FS #include #include #include #include #include #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** The maximum allocation group cache size (in bytes). */ #if ARCH_BITS >= 64 # define RTFSXFS_MAX_AG_CACHE_SIZE _512K #else # define RTFSXFS_MAX_AG_CACHE_SIZE _128K #endif /** The maximum inode cache size (in bytes). */ #if ARCH_BITS >= 64 # define RTFSXFS_MAX_INODE_CACHE_SIZE _512K #else # define RTFSXFS_MAX_INODE_CACHE_SIZE _128K #endif /** The maximum extent tree cache size (in bytes). */ #if ARCH_BITS >= 64 # define RTFSXFS_MAX_BLOCK_CACHE_SIZE _512K #else # define RTFSXFS_MAX_BLOCK_CACHE_SIZE _128K #endif /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** Pointer to the XFS filesystem data. */ typedef struct RTFSXFSVOL *PRTFSXFSVOL; /** * Cached allocation group descriptor data. */ typedef struct RTFSXFSAG { /** AVL tree node, indexed by the allocation group number. */ AVLU32NODECORE Core; /** List node for the LRU list used for eviction. */ RTLISTNODE NdLru; /** Reference counter. */ volatile uint32_t cRefs; /** @todo */ } RTFSXFSAG; /** Pointer to allocation group descriptor data. */ typedef RTFSXFSAG *PRTFSXFSAG; /** * In-memory inode. */ typedef struct RTFSXFSINODE { /** AVL tree node, indexed by the inode number. */ AVLU64NODECORE Core; /** List node for the inode LRU list used for eviction. */ RTLISTNODE NdLru; /** Reference counter. */ volatile uint32_t cRefs; /** Byte offset in the backing file where the inode is stored.. */ uint64_t offInode; /** Inode data. */ RTFSOBJINFO ObjInfo; /** Inode data fork format. */ uint8_t enmFormat; /** Inode flags. */ uint16_t fFlags; } RTFSXFSINODE; /** Pointer to an in-memory inode. */ typedef RTFSXFSINODE *PRTFSXFSINODE; /** * Block cache entry. */ typedef struct RTFSXFSBLOCKENTRY { /** AVL tree node, indexed by the filesystem block number. */ AVLU64NODECORE Core; /** List node for the inode LRU list used for eviction. */ RTLISTNODE NdLru; /** Reference counter. */ volatile uint32_t cRefs; /** The block data. */ uint8_t abData[1]; } RTFSXFSBLOCKENTRY; /** Pointer to a block cache entry. */ typedef RTFSXFSBLOCKENTRY *PRTFSXFSBLOCKENTRY; /** * Open directory instance. */ typedef struct RTFSXFSDIR { /** Volume this directory belongs to. */ PRTFSXFSVOL pVol; /** The underlying inode structure. */ PRTFSXFSINODE pInode; /** Set if we've reached the end of the directory enumeration. */ bool fNoMoreFiles; /** Current offset into the directory where the next entry should be read. */ uint64_t offEntry; /** Next entry index (for logging purposes). */ uint32_t idxEntry; } RTFSXFSDIR; /** Pointer to an open directory instance. */ typedef RTFSXFSDIR *PRTFSXFSDIR; /** * Open file instance. */ typedef struct RTFSXFSFILE { /** Volume this directory belongs to. */ PRTFSXFSVOL pVol; /** The underlying inode structure. */ PRTFSXFSINODE pInode; /** Current offset into the file for I/O. */ RTFOFF offFile; } RTFSXFSFILE; /** Pointer to an open file instance. */ typedef RTFSXFSFILE *PRTFSXFSFILE; /** * XFS filesystem volume. */ typedef struct RTFSXFSVOL { /** Handle to itself. */ RTVFS hVfsSelf; /** The file, partition, or whatever backing the ext volume. */ RTVFSFILE hVfsBacking; /** The size of the backing thingy. */ uint64_t cbBacking; /** RTVFSMNT_F_XXX. */ uint32_t fMntFlags; /** RTFSXFSVFS_F_XXX (currently none defined). */ uint32_t fXfsFlags; /** Size of one sector. */ size_t cbSector; /** Size of one block. */ size_t cbBlock; /** Number of bits to shift for converting a block number to byte offset. */ uint32_t cBlockShift; /** Number of blocks per allocation group. */ XFSAGNUMBER cBlocksPerAg; /** Number of blocks per allocation group as log2. */ uint32_t cAgBlocksLog; /** Number of allocation groups for this volume. */ uint32_t cAgs; /** inode of the root directory. */ XFSINO uInodeRoot; /** Inode size in bytes. */ size_t cbInode; /** Number of inodes per block. */ uint32_t cInodesPerBlock; /** Number of inodes per block as log2. */ uint32_t cInodesPerBlockLog; /** @name Allocation group cache. * @{ */ /** LRU list anchor. */ RTLISTANCHOR LstAgLru; /** Root of the cached allocation group tree. */ AVLU32TREE AgRoot; /** Size of the cached allocation groups. */ size_t cbAgs; /** @} */ /** @name Inode cache. * @{ */ /** LRU list anchor for the inode cache. */ RTLISTANCHOR LstInodeLru; /** Root of the cached inode tree. */ AVLU64TREE InodeRoot; /** Size of the cached inodes. */ size_t cbInodes; /** @} */ /** @name Block cache. * @{ */ /** LRU list anchor for the block cache. */ RTLISTANCHOR LstBlockLru; /** Root of the cached block tree. */ AVLU64TREE BlockRoot; /** Size of cached blocks. */ size_t cbBlocks; /** @} */ } RTFSXFSVOL; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static int rtFsXfsVol_OpenDirByInode(PRTFSXFSVOL pThis, uint32_t iInode, PRTVFSDIR phVfsDir); #ifdef LOG_ENABLED /** * Logs the XFS filesystem superblock. * * @returns nothing. * @param iAg The allocation group number for the given super block. * @param pSb Pointer to the superblock. */ static void rtFsXfsSb_Log(uint32_t iAg, PCXFSSUPERBLOCK pSb) { if (LogIs2Enabled()) { Log2(("XFS: Superblock %#RX32:\n", iAg)); Log2(("XFS: u32Magic %#RX32\n", RT_BE2H_U32(pSb->u32Magic))); Log2(("XFS: cbBlock %RU32\n", RT_BE2H_U32(pSb->cbBlock))); Log2(("XFS: cBlocks %RU64\n", RT_BE2H_U64(pSb->cBlocks))); Log2(("XFS: cBlocksRtDev %RU64\n", RT_BE2H_U64(pSb->cBlocksRtDev))); Log2(("XFS: cExtentsRtDev %RU64\n", RT_BE2H_U64(pSb->cExtentsRtDev))); Log2(("XFS: abUuid \n")); Log2(("XFS: uBlockJournal %#RX64\n", RT_BE2H_U64(pSb->uBlockJournal))); Log2(("XFS: uInodeRoot %#RX64\n", RT_BE2H_U64(pSb->uInodeRoot))); Log2(("XFS: uInodeBitmapRtExt %#RX64\n", RT_BE2H_U64(pSb->uInodeBitmapRtExt))); Log2(("XFS: uInodeBitmapSummary %#RX64\n", RT_BE2H_U64(pSb->uInodeBitmapSummary))); Log2(("XFS: cRtExtent %RU32\n", RT_BE2H_U32(pSb->cRtExtent))); Log2(("XFS: cAgBlocks %RU32\n", RT_BE2H_U32(pSb->cAgBlocks))); Log2(("XFS: cAg %RU32\n", RT_BE2H_U32(pSb->cAg))); Log2(("XFS: cRtBitmapBlocks %RU32\n", RT_BE2H_U32(pSb->cRtBitmapBlocks))); Log2(("XFS: cJournalBlocks %RU32\n", RT_BE2H_U32(pSb->cJournalBlocks))); Log2(("XFS: fVersion %#RX16%s%s%s%s%s%s%s%s%s%s%s\n", RT_BE2H_U16(pSb->fVersion), RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_ATTR ? " attr" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_NLINK ? " nlink" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_QUOTA ? " quota" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_ALIGN ? " align" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_DALIGN ? " dalign" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_SHARED ? " shared" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_LOGV2 ? " logv2" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_SECTOR ? " sector" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_EXTFLG ? " extflg" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_DIRV2 ? " dirv2" : "", RT_BE2H_U16(pSb->fVersion) & XFS_SB_VERSION_F_FEAT2 ? " feat2" : "")); Log2(("XFS: cbSector %RU16\n", RT_BE2H_U16(pSb->cbSector))); Log2(("XFS: cbInode %RU16\n", RT_BE2H_U16(pSb->cbInode))); Log2(("XFS: cIndoesPerBlock %RU16\n", RT_BE2H_U16(pSb->cInodesPerBlock))); Log2(("XFS: achFsName %12s\n", &pSb->achFsName[0])); Log2(("XFS: cBlockSzLog %RU8\n", pSb->cBlockSzLog)); Log2(("XFS: cSectorSzLog %RU8\n", pSb->cSectorSzLog)); Log2(("XFS: cInodeSzLog %RU8\n", pSb->cInodeSzLog)); Log2(("XFS: cInodesPerBlockLog %RU8\n", pSb->cInodesPerBlockLog)); Log2(("XFS: cAgBlocksLog %RU8\n", pSb->cAgBlocksLog)); Log2(("XFS: cExtentsRtDevLog %RU8\n", pSb->cExtentsRtDevLog)); Log2(("XFS: fInProgress %RU8\n", pSb->fInProgress)); Log2(("XFS: cInodeMaxPct %RU8\n", pSb->cInodeMaxPct)); Log2(("XFS: cInodesGlobal %#RX64\n", RT_BE2H_U64(pSb->cInodesGlobal))); Log2(("XFS: cInodesGlobalFree %#RX64\n", RT_BE2H_U64(pSb->cInodesGlobalFree))); Log2(("XFS: cBlocksFree %#RX64\n", RT_BE2H_U64(pSb->cBlocksFree))); Log2(("XFS: cExtentsRtFree %#RX64\n", RT_BE2H_U64(pSb->cExtentsRtFree))); Log2(("XFS: uInodeQuotaUsr %#RX64\n", RT_BE2H_U64(pSb->uInodeQuotaUsr))); Log2(("XFS: uInodeQuotaGrp %#RX64\n", RT_BE2H_U64(pSb->uInodeQuotaGrp))); Log2(("XFS: fQuotaFlags %#RX16\n", RT_BE2H_U16(pSb->fQuotaFlags))); Log2(("XFS: fFlagsMisc %#RX8\n", pSb->fFlagsMisc)); Log2(("XFS: uSharedVn %#RX8\n", pSb->uSharedVn)); Log2(("XFS: cBlocksInodeAlignment %#RX32\n", RT_BE2H_U32(pSb->cBlocksInodeAlignment))); Log2(("XFS: cBlocksRaidStripe %#RX32\n", RT_BE2H_U32(pSb->cBlocksRaidStripe))); Log2(("XFS: cBlocksRaidWidth %#RX32\n", RT_BE2H_U32(pSb->cBlocksRaidWidth))); Log2(("XFS: cDirBlockAllocLog %RU8\n", pSb->cDirBlockAllocLog)); Log2(("XFS: cLogDevSubVolSectorSzLog %RU8\n", pSb->cLogDevSubVolSectorSzLog)); Log2(("XFS: cLogDevSectorSzLog %RU16\n", RT_BE2H_U16(pSb->cLogDevSectorSzLog))); Log2(("XFS: cLogDevRaidStripe %RU32\n", RT_BE2H_U32(pSb->cLogDevRaidStripe))); Log2(("XFS: fFeatures2 %#RX32\n", RT_BE2H_U32(pSb->fFeatures2))); Log2(("XFS: fFeaturesRw %#RX32\n", RT_BE2H_U32(pSb->fFeaturesRw))); Log2(("XFS: fFeaturesRo %#RX32\n", RT_BE2H_U32(pSb->fFeaturesRo))); Log2(("XFS: fFeaturesIncompatRw %#RX32\n", RT_BE2H_U32(pSb->fFeaturesIncompatRw))); Log2(("XFS: fFeaturesJrnlIncompatRw %#RX32\n", RT_BE2H_U32(pSb->fFeaturesJrnlIncompatRw))); Log2(("XFS: u32Chksum %#RX32\n", RT_BE2H_U32(pSb->u32Chksum))); Log2(("XFS: u32SparseInodeAlignment %#RX32\n", RT_BE2H_U32(pSb->u32SparseInodeAlignment))); Log2(("XFS: uInodeProjectQuota %#RX64\n", RT_BE2H_U64(pSb->uInodeProjectQuota))); Log2(("XFS: uJrnlSeqSbUpdate %#RX64\n", RT_BE2H_U64(pSb->uJrnlSeqSbUpdate))); Log2(("XFS: abUuidMeta \n")); Log2(("XFS: uInodeRm %#RX64\n", RT_BE2H_U64(pSb->uInodeRm))); } } /** * Logs a AG free space block. * * @returns nothing. * @param iAg The allocation group number for the given free space block. * @param pAgf The AG free space block. */ static void rtFsXfsAgf_Log(uint32_t iAg, PCXFSAGF pAgf) { if (LogIs2Enabled()) { Log2(("XFS: AGF %#RX32:\n", iAg)); Log2(("XFS: u32Magic %#RX32\n", RT_BE2H_U32(pAgf->u32Magic))); Log2(("XFS: uVersion %#RX32\n", RT_BE2H_U32(pAgf->uVersion))); Log2(("XFS: uSeqNo %#RX32\n", RT_BE2H_U32(pAgf->uSeqNo))); Log2(("XFS: cLengthBlocks %#RX32\n", RT_BE2H_U32(pAgf->cLengthBlocks))); Log2(("XFS: auRoots[0] %#RX32\n", RT_BE2H_U32(pAgf->auRoots[0]))); Log2(("XFS: auRoots[1] %#RX32\n", RT_BE2H_U32(pAgf->auRoots[1]))); Log2(("XFS: auRoots[2] %#RX32\n", RT_BE2H_U32(pAgf->auRoots[2]))); Log2(("XFS: acLvls[0] %RU32\n", RT_BE2H_U32(pAgf->acLvls[0]))); Log2(("XFS: acLvls[1] %RU32\n", RT_BE2H_U32(pAgf->acLvls[1]))); Log2(("XFS: acLvls[2] %RU32\n", RT_BE2H_U32(pAgf->acLvls[2]))); Log2(("XFS: idxFreeListFirst %RU32\n", RT_BE2H_U32(pAgf->idxFreeListFirst))); Log2(("XFS: idxFreeListLast %RU32\n", RT_BE2H_U32(pAgf->idxFreeListLast))); Log2(("XFS: cFreeListBlocks %RU32\n", RT_BE2H_U32(pAgf->cFreeListBlocks))); Log2(("XFS: cFreeBlocks %RU32\n", RT_BE2H_U32(pAgf->cFreeBlocks))); Log2(("XFS: cFreeBlocksLongest %RU32\n", RT_BE2H_U32(pAgf->cFreeBlocksLongest))); Log2(("XFS: cBlocksBTrees %RU32\n", RT_BE2H_U32(pAgf->cBlocksBTrees))); Log2(("XFS: abUuid \n")); Log2(("XFS: cBlocksRevMap %RU32\n", RT_BE2H_U32(pAgf->cBlocksRevMap))); Log2(("XFS: cBlocksRefcountBTree %RU32\n", RT_BE2H_U32(pAgf->cBlocksRefcountBTree))); Log2(("XFS: uRootRefcount %#RX32\n", RT_BE2H_U32(pAgf->uRootRefcount))); Log2(("XFS: cLvlRefcount %RU32\n", RT_BE2H_U32(pAgf->cLvlRefcount))); Log2(("XFS: uSeqNoLastWrite %#RX64\n", RT_BE2H_U64(pAgf->uSeqNoLastWrite))); Log2(("XFS: uChkSum %#RX32\n", RT_BE2H_U32(pAgf->uChkSum))); } } /** * Loads an AG inode information block. * * @returns nothing. * @param iAg The allocation group number for the given inode information block. * @param pAgi The AG inode information block. */ static void rtFsXfsAgi_Log(uint32_t iAg, PCXFSAGI pAgi) { if (LogIs2Enabled()) { Log2(("XFS: AGI %#RX32:\n", iAg)); Log2(("XFS: u32Magic %#RX32\n", RT_BE2H_U32(pAgi->u32Magic))); Log2(("XFS: uVersion %#RX32\n", RT_BE2H_U32(pAgi->uVersion))); Log2(("XFS: uSeqNo %#RX32\n", RT_BE2H_U32(pAgi->uSeqNo))); Log2(("XFS: cLengthBlocks %#RX32\n", RT_BE2H_U32(pAgi->cLengthBlocks))); Log2(("XFS: cInodesAlloc %#RX32\n", RT_BE2H_U32(pAgi->cInodesAlloc))); Log2(("XFS: uRootInode %#RX32\n", RT_BE2H_U32(pAgi->uRootInode))); Log2(("XFS: cLvlsInode %RU32\n", RT_BE2H_U32(pAgi->cLvlsInode))); Log2(("XFS: uInodeNew %#RX32\n", RT_BE2H_U32(pAgi->uInodeNew))); Log2(("XFS: uInodeDir %#RX32\n", RT_BE2H_U32(pAgi->uInodeDir))); Log2(("XFS: au32HashUnlinked[0..63] \n")); Log2(("XFS: abUuid \n")); Log2(("XFS: uChkSum %#RX32\n", RT_BE2H_U32(pAgi->uChkSum))); Log2(("XFS: uSeqNoLastWrite %#RX64\n", RT_BE2H_U64(pAgi->uSeqNoLastWrite))); Log2(("XFS: uRootFreeInode %#RX32\n", RT_BE2H_U32(pAgi->uRootFreeInode))); Log2(("XFS: cLvlsFreeInode %RU32\n", RT_BE2H_U32(pAgi->cLvlsFreeInode))); } } /** * Logs a XFS filesystem inode. * * @returns nothing. * @param pThis The XFS volume instance. * @param iInode Inode number. * @param pInode Pointer to the inode. */ static void rtFsXfsInode_Log(PRTFSXFSVOL pThis, XFSINO iInode, PCXFSINODECORE pInode) { RT_NOREF(pThis); if (LogIs2Enabled()) { RTTIMESPEC Spec; char sz[80]; Log2(("XFS: Inode %#RX64:\n", iInode)); Log2(("XFS: u16Magic %#RX16\n", RT_BE2H_U16(pInode->u16Magic))); Log2(("XFS: fMode %#RX16\n", RT_BE2H_U16(pInode->fMode))); Log2(("XFS: iVersion %#RX8\n", pInode->iVersion)); Log2(("XFS: enmFormat %#RX8\n", pInode->enmFormat)); Log2(("XFS: cOnLinks %RU16\n", RT_BE2H_U16(pInode->cOnLinks))); Log2(("XFS: uUid %#RX32\n", RT_BE2H_U32(pInode->uUid))); Log2(("XFS: uGid %#RX32\n", RT_BE2H_U32(pInode->uGid))); Log2(("XFS: cLinks %#RX32\n", RT_BE2H_U32(pInode->cLinks))); Log2(("XFS: uProjIdLow %#RX16\n", RT_BE2H_U16(pInode->uProjIdLow))); Log2(("XFS: uProjIdHigh %#RX16\n", RT_BE2H_U16(pInode->uProjIdHigh))); Log2(("XFS: cFlush %RU16\n", RT_BE2H_U16(pInode->cFlush))); Log2(("XFS: TsLastAccessed %#RX32:%#RX32 %s\n", RT_BE2H_U32(pInode->TsLastAccessed.cSecEpoch), RT_BE2H_U32(pInode->TsLastAccessed.cNanoSec), RTTimeSpecToString(RTTimeSpecAddNano(RTTimeSpecSetSeconds(&Spec, RT_BE2H_U32(pInode->TsLastAccessed.cSecEpoch)), RT_BE2H_U32(pInode->TsLastAccessed.cNanoSec)), sz, sizeof(sz)))); Log2(("XFS: TsLastModified %#RX32:%#RX32 %s\n", RT_BE2H_U32(pInode->TsLastModified.cSecEpoch), RT_BE2H_U32(pInode->TsLastModified.cNanoSec), RTTimeSpecToString(RTTimeSpecAddNano(RTTimeSpecSetSeconds(&Spec, RT_BE2H_U32(pInode->TsLastModified.cSecEpoch)), RT_BE2H_U32(pInode->TsLastModified.cNanoSec)), sz, sizeof(sz)))); Log2(("XFS: TsCreatedModified %#RX32:%#RX32 %s\n", RT_BE2H_U32(pInode->TsCreatedModified.cSecEpoch), RT_BE2H_U32(pInode->TsCreatedModified.cNanoSec), RTTimeSpecToString(RTTimeSpecAddNano(RTTimeSpecSetSeconds(&Spec, RT_BE2H_U32(pInode->TsCreatedModified.cSecEpoch)), RT_BE2H_U32(pInode->TsCreatedModified.cNanoSec)), sz, sizeof(sz)))); Log2(("XFS: cbInode %#RX64\n", RT_BE2H_U64(pInode->cbInode))); Log2(("XFS: cBlocks %#RX64\n", RT_BE2H_U64(pInode->cBlocks))); Log2(("XFS: cExtentBlocksMin %#RX32\n", RT_BE2H_U32(pInode->cExtentBlocksMin))); Log2(("XFS: cExtentsData %#RX32\n", RT_BE2H_U32(pInode->cExtentsData))); Log2(("XFS: cExtentsAttr %#RX16\n", RT_BE2H_U16(pInode->cExtentsAttr))); Log2(("XFS: offAttrFork %#RX8\n", pInode->offAttrFork)); Log2(("XFS: enmFormatAttr %#RX8\n", pInode->enmFormatAttr)); Log2(("XFS: fEvtMaskDmig %#RX32\n", RT_BE2H_U32(pInode->fEvtMaskDmig))); Log2(("XFS: uStateDmig %#RX16\n", RT_BE2H_U16(pInode->uStateDmig))); Log2(("XFS: fFlags %#RX16\n", RT_BE2H_U16(pInode->fFlags))); Log2(("XFS: cGeneration %#RX32\n", RT_BE2H_U32(pInode->cGeneration))); Log2(("XFS: offBlockUnlinkedNext %#RX32\n", RT_BE2H_U32(pInode->offBlockUnlinkedNext))); Log2(("XFS: uChkSum %#RX32\n", RT_BE2H_U32(pInode->uChkSum))); Log2(("XFS: cAttrChanges %#RX64\n", RT_BE2H_U64(pInode->cAttrChanges))); Log2(("XFS: uFlushSeqNo %#RX64\n", RT_BE2H_U64(pInode->uFlushSeqNo))); Log2(("XFS: fFlags2 %#RX64\n", RT_BE2H_U64(pInode->fFlags2))); Log2(("XFS: cExtentCowMin %#RX32\n", RT_BE2H_U32(pInode->cExtentCowMin))); Log2(("XFS: TsCreation %#RX32:%#RX32 %s\n", RT_BE2H_U32(pInode->TsCreation.cSecEpoch), RT_BE2H_U32(pInode->TsCreation.cNanoSec), RTTimeSpecToString(RTTimeSpecAddNano(RTTimeSpecSetSeconds(&Spec, RT_BE2H_U32(pInode->TsCreation.cSecEpoch)), RT_BE2H_U32(pInode->TsCreation.cNanoSec)), sz, sizeof(sz)))); Log2(("XFS: uInode %#RX64\n", RT_BE2H_U64(pInode->uInode))); Log2(("XFS: abUuid \n")); } } #if 0 /** * Logs a XFS filesystem directory entry. * * @returns nothing. * @param pThis The XFS volume instance. * @param idxDirEntry Directory entry index number. * @param pDirEntry The directory entry. */ static void rtFsXfsDirEntry_Log(PRTFSXFSVOL pThis, uint32_t idxDirEntry, PCXFSDIRENTRYEX pDirEntry) { if (LogIs2Enabled()) { } } #endif #endif /** * Converts a block number to a byte offset. * * @returns Offset in bytes for the given block number. * @param pThis The XFS volume instance. * @param iBlock The block number to convert. */ DECLINLINE(uint64_t) rtFsXfsBlockIdxToDiskOffset(PRTFSXFSVOL pThis, uint64_t iBlock) { return iBlock << pThis->cBlockShift; } /** * Converts a byte offset to a block number. * * @returns Block number. * @param pThis The XFS volume instance. * @param iBlock The offset to convert. */ DECLINLINE(uint64_t) rtFsXfsDiskOffsetToBlockIdx(PRTFSXFSVOL pThis, uint64_t off) { return off >> pThis->cBlockShift; } /** * Splits the given absolute inode number into the AG number, block inside the AG * and the offset into the block where to find the inode structure. * * @returns nothing. * @param pThis The XFS volume instance. * @param iInode The inode to split. * @param piAg Where to store the AG number. * @param puBlock Where to store the block number inside the AG. * @param poffBlock Where to store the offset into the block. */ DECLINLINE(void) rtFsXfsInodeSplitAbs(PRTFSXFSVOL pThis, XFSINO iInode, uint32_t *piAg, uint32_t *puBlock, uint32_t *poffBlock) { *poffBlock = iInode & (pThis->cInodesPerBlock - 1); iInode >>= pThis->cInodesPerBlockLog; *puBlock = iInode & (RT_BIT_32(pThis->cAgBlocksLog) - 1); /* Using the log2 value here as it is rounded. */ iInode >>= RT_BIT_32(pThis->cAgBlocksLog) - 1; *piAg = (uint32_t)iInode; } /** * Allocates a new block group. * * @returns Pointer to the new block group descriptor or NULL if out of memory. * @param pThis The XFS volume instance. * @param cbAlloc How much to allocate. * @param iBlockGroup Block group number. */ static PRTFSXFSBLOCKENTRY rtFsXfsVol_BlockAlloc(PRTFSXFSVOL pThis, size_t cbAlloc, uint64_t iBlock) { PRTFSXFSBLOCKENTRY pBlock = (PRTFSXFSBLOCKENTRY)RTMemAllocZ(cbAlloc); if (RT_LIKELY(pBlock)) { pBlock->Core.Key = iBlock; pBlock->cRefs = 0; pThis->cbBlocks += cbAlloc; } return pBlock; } /** * Returns a new block entry utilizing the cache if possible. * * @returns Pointer to the new block entry or NULL if out of memory. * @param pThis The XFS volume instance. * @param iBlock Block number. */ static PRTFSXFSBLOCKENTRY rtFsXfsVol_BlockGetNew(PRTFSXFSVOL pThis, uint64_t iBlock) { PRTFSXFSBLOCKENTRY pBlock = NULL; size_t cbAlloc = RT_UOFFSETOF_DYN(RTFSXFSBLOCKENTRY, abData[pThis->cbBlock]); if (pThis->cbBlocks + cbAlloc <= RTFSXFS_MAX_BLOCK_CACHE_SIZE) pBlock = rtFsXfsVol_BlockAlloc(pThis, cbAlloc, iBlock); else { pBlock = RTListRemoveLast(&pThis->LstBlockLru, RTFSXFSBLOCKENTRY, NdLru); if (!pBlock) pBlock = rtFsXfsVol_BlockAlloc(pThis, cbAlloc, iBlock); else { /* Remove the block group from the tree because it gets a new key. */ PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->BlockRoot, pBlock->Core.Key); Assert(pCore == &pBlock->Core); RT_NOREF(pCore); } } Assert(!pBlock->cRefs); pBlock->Core.Key = iBlock; pBlock->cRefs = 1; return pBlock; } /** * Frees the given block. * * @returns nothing. * @param pThis The XFS volume instance. * @param pBlock The block to free. */ static void rtFsXfsVol_BlockFree(PRTFSXFSVOL pThis, PRTFSXFSBLOCKENTRY pBlock) { Assert(!pBlock->cRefs); /* * Put it into the cache if the limit wasn't exceeded, otherwise the block group * is freed right away. */ if (pThis->cbBlocks <= RTFSXFS_MAX_BLOCK_CACHE_SIZE) { /* Put onto the LRU list. */ RTListPrepend(&pThis->LstBlockLru, &pBlock->NdLru); } else { /* Remove from the tree and free memory. */ PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->BlockRoot, pBlock->Core.Key); Assert(pCore == &pBlock->Core); RT_NOREF(pCore); RTMemFree(pBlock); pThis->cbBlocks -= RT_UOFFSETOF_DYN(RTFSXFSBLOCKENTRY, abData[pThis->cbBlock]); } } /** * Gets the specified block data from the volume. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param iBlock The filesystem block to load. * @param ppBlock Where to return the pointer to the block entry on success. * @param ppvData Where to return the pointer to the block data on success. */ static int rtFsXfsVol_BlockLoad(PRTFSXFSVOL pThis, uint64_t iBlock, PRTFSXFSBLOCKENTRY *ppBlock, void **ppvData) { int rc = VINF_SUCCESS; /* Try to fetch the block group from the cache first. */ PRTFSXFSBLOCKENTRY pBlock = (PRTFSXFSBLOCKENTRY)RTAvlU64Get(&pThis->BlockRoot, iBlock); if (!pBlock) { /* Slow path, load from disk. */ pBlock = rtFsXfsVol_BlockGetNew(pThis, iBlock); if (RT_LIKELY(pBlock)) { uint64_t offRead = rtFsXfsBlockIdxToDiskOffset(pThis, iBlock); rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &pBlock->abData[0], pThis->cbBlock, NULL); if (RT_SUCCESS(rc)) { bool fIns = RTAvlU64Insert(&pThis->BlockRoot, &pBlock->Core); Assert(fIns); RT_NOREF(fIns); } } else rc = VERR_NO_MEMORY; } else { /* Remove from current LRU list position and add to the beginning. */ uint32_t cRefs = ASMAtomicIncU32(&pBlock->cRefs); if (cRefs == 1) /* Blocks get removed from the LRU list if they are referenced. */ RTListNodeRemove(&pBlock->NdLru); } if (RT_SUCCESS(rc)) { *ppBlock = pBlock; *ppvData = &pBlock->abData[0]; } else if (pBlock) { ASMAtomicDecU32(&pBlock->cRefs); rtFsXfsVol_BlockFree(pThis, pBlock); /* Free the block. */ } return rc; } /** * Releases a reference of the given block. * * @returns nothing. * @param pThis The XFS volume instance. * @param pBlock The block to release. */ static void rtFsXfsVol_BlockRelease(PRTFSXFSVOL pThis, PRTFSXFSBLOCKENTRY pBlock) { uint32_t cRefs = ASMAtomicDecU32(&pBlock->cRefs); if (!cRefs) rtFsXfsVol_BlockFree(pThis, pBlock); } /** * Allocates a new alloction group. * * @returns Pointer to the new allocation group descriptor or NULL if out of memory. * @param pThis The XFS volume instance. * @param iAG Allocation group number. */ static PRTFSXFSAG rtFsXfsAg_Alloc(PRTFSXFSVOL pThis, uint32_t iAg) { PRTFSXFSAG pAg = (PRTFSXFSAG)RTMemAllocZ(sizeof(RTFSXFSAG)); if (RT_LIKELY(pAg)) { pAg->Core.Key = iAg; pAg->cRefs = 0; pThis->cbAgs += sizeof(RTFSXFSAG); } return pAg; } /** * Frees the given allocation group. * * @returns nothing. * @param pThis The XFS volume instance. * @param pAg The allocation group to free. */ static void rtFsXfsAg_Free(PRTFSXFSVOL pThis, PRTFSXFSAG pAg) { Assert(!pAg->cRefs); /* * Put it into the cache if the limit wasn't exceeded, otherwise the allocation group * is freed right away. */ if (pThis->cbAgs <= RTFSXFS_MAX_AG_CACHE_SIZE) { /* Put onto the LRU list. */ RTListPrepend(&pThis->LstAgLru, &pAg->NdLru); } else { /* Remove from the tree and free memory. */ PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->AgRoot, pAg->Core.Key); Assert(pCore == &pAg->Core); RT_NOREF(pCore); RTMemFree(pAg); pThis->cbAgs -= sizeof(RTFSXFSAG); } } /** * Returns a new block group utilizing the cache if possible. * * @returns Pointer to the new block group descriptor or NULL if out of memory. * @param pThis The XFS volume instance. * @param iAg Allocation group number. */ static PRTFSXFSAG rtFsXfsAg_GetNew(PRTFSXFSVOL pThis, uint32_t iAg) { PRTFSXFSAG pAg = NULL; if (pThis->cbAgs + sizeof(RTFSXFSAG) <= RTFSXFS_MAX_AG_CACHE_SIZE) pAg = rtFsXfsAg_Alloc(pThis, iAg); else { pAg = RTListRemoveLast(&pThis->LstAgLru, RTFSXFSAG, NdLru); if (!pAg) pAg = rtFsXfsAg_Alloc(pThis, iAg); else { /* Remove the block group from the tree because it gets a new key. */ PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->AgRoot, pAg->Core.Key); Assert(pCore == &pAg->Core); RT_NOREF(pCore); } } Assert(!pAg->cRefs); pAg->Core.Key = iAg; pAg->cRefs = 1; return pAg; } /** * Loads the given allocation group number and returns it on success. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param iAg The allocation group to load. * @param ppAg Where to store the allocation group on success. */ static int rtFsXfsAg_Load(PRTFSXFSVOL pThis, uint32_t iAg, PRTFSXFSAG *ppAg) { int rc = VINF_SUCCESS; AssertReturn(iAg < pThis->cAgs, VERR_VFS_BOGUS_FORMAT); /* Try to fetch the allocation group from the cache first. */ PRTFSXFSAG pAg = (PRTFSXFSAG)RTAvlU32Get(&pThis->AgRoot, iAg); if (!pAg) { /* Slow path, load from disk. */ pAg = rtFsXfsAg_GetNew(pThis, iAg); if (RT_LIKELY(pAg)) { uint64_t offRead = rtFsXfsBlockIdxToDiskOffset(pThis, iAg * pThis->cBlocksPerAg); XFSSUPERBLOCK Sb; rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &Sb, sizeof(Sb), NULL); if (RT_SUCCESS(rc)) { #ifdef LOG_ENABLED rtFsXfsSb_Log(iAg, &Sb); #endif } } else rc = VERR_NO_MEMORY; } else { /* Remove from current LRU list position and add to the beginning. */ uint32_t cRefs = ASMAtomicIncU32(&pAg->cRefs); if (cRefs == 1) /* Block groups get removed from the LRU list if they are referenced. */ RTListNodeRemove(&pAg->NdLru); } if (RT_SUCCESS(rc)) *ppAg = pAg; else if (pAg) { ASMAtomicDecU32(&pAg->cRefs); rtFsXfsAg_Free(pThis, pAg); /* Free the allocation group. */ } return rc; } /** * Releases a reference of the given allocation group. * * @returns nothing. * @param pThis The XFS volume instance. * @param pAg The allocation group to release. */ static void rtFsXfsAg_Release(PRTFSXFSVOL pThis, PRTFSXFSAG pAg) { uint32_t cRefs = ASMAtomicDecU32(&pAg->cRefs); if (!cRefs) rtFsXfsAg_Free(pThis, pAg); } /** * Allocates a new inode. * * @returns Pointer to the new inode or NULL if out of memory. * @param pThis The XFS volume instance. * @param iInode Inode number. */ static PRTFSXFSINODE rtFsXfsInode_Alloc(PRTFSXFSVOL pThis, uint32_t iInode) { PRTFSXFSINODE pInode = (PRTFSXFSINODE)RTMemAllocZ(sizeof(RTFSXFSINODE)); if (RT_LIKELY(pInode)) { pInode->Core.Key = iInode; pInode->cRefs = 0; pThis->cbInodes += sizeof(RTFSXFSINODE); } return pInode; } /** * Frees the given inode. * * @returns nothing. * @param pThis The XFS volume instance. * @param pInode The inode to free. */ static void rtFsXfsInode_Free(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode) { Assert(!pInode->cRefs); /* * Put it into the cache if the limit wasn't exceeded, otherwise the inode * is freed right away. */ if (pThis->cbInodes <= RTFSXFS_MAX_INODE_CACHE_SIZE) { /* Put onto the LRU list. */ RTListPrepend(&pThis->LstInodeLru, &pInode->NdLru); } else { /* Remove from the tree and free memory. */ PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->InodeRoot, pInode->Core.Key); Assert(pCore == &pInode->Core); RT_NOREF(pCore); RTMemFree(pInode); pThis->cbInodes -= sizeof(RTFSXFSINODE); } } /** * Returns a new inodep utilizing the cache if possible. * * @returns Pointer to the new inode or NULL if out of memory. * @param pThis The XFS volume instance. * @param iInode Inode number. */ static PRTFSXFSINODE rtFsXfsInode_GetNew(PRTFSXFSVOL pThis, XFSINO iInode) { PRTFSXFSINODE pInode = NULL; if (pThis->cbInodes + sizeof(RTFSXFSINODE) <= RTFSXFS_MAX_INODE_CACHE_SIZE) pInode = rtFsXfsInode_Alloc(pThis, iInode); else { pInode = RTListRemoveLast(&pThis->LstInodeLru, RTFSXFSINODE, NdLru); if (!pInode) pInode = rtFsXfsInode_Alloc(pThis, iInode); else { /* Remove the block group from the tree because it gets a new key. */ PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->InodeRoot, pInode->Core.Key); Assert(pCore == &pInode->Core); RT_NOREF(pCore); } } Assert(!pInode->cRefs); pInode->Core.Key = iInode; pInode->cRefs = 1; return pInode; } /** * Loads the given inode number and returns it on success. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param iInode The inode to load. * @param ppInode Where to store the inode on success. */ static int rtFsXfsInode_Load(PRTFSXFSVOL pThis, XFSINO iInode, PRTFSXFSINODE *ppInode) { int rc = VINF_SUCCESS; /* Try to fetch the inode from the cache first. */ PRTFSXFSINODE pInode = (PRTFSXFSINODE)RTAvlU64Get(&pThis->InodeRoot, iInode); if (!pInode) { /* Slow path, load from disk. */ pInode = rtFsXfsInode_GetNew(pThis, iInode); if (RT_LIKELY(pInode)) { uint32_t iAg; uint32_t uBlock; uint32_t offBlock; rtFsXfsInodeSplitAbs(pThis, iInode, &iAg, &uBlock, &offBlock); uint64_t offRead = (iAg * pThis->cBlocksPerAg + uBlock) * pThis->cbBlock + offBlock; XFSINODECORE Inode; rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &Inode, RT_MIN(sizeof(Inode), pThis->cbInode), NULL); if (RT_SUCCESS(rc)) { #ifdef LOG_ENABLED rtFsXfsInode_Log(pThis, iInode, &Inode); #endif pInode->offInode = offRead; pInode->fFlags = RT_BE2H_U16(Inode.fFlags); pInode->enmFormat = Inode.enmFormat; pInode->ObjInfo.cbObject = RT_BE2H_U64(Inode.cbInode); pInode->ObjInfo.cbAllocated = RT_BE2H_U64(Inode.cBlocks) * pThis->cbBlock; RTTimeSpecSetSeconds(&pInode->ObjInfo.AccessTime, RT_BE2H_U32(Inode.TsLastAccessed.cSecEpoch)); RTTimeSpecAddNano(&pInode->ObjInfo.AccessTime, RT_BE2H_U32(Inode.TsLastAccessed.cNanoSec)); RTTimeSpecSetSeconds(&pInode->ObjInfo.ModificationTime, RT_BE2H_U32(Inode.TsLastModified.cSecEpoch)); RTTimeSpecAddNano(&pInode->ObjInfo.ModificationTime, RT_BE2H_U32(Inode.TsLastModified.cNanoSec)); RTTimeSpecSetSeconds(&pInode->ObjInfo.ChangeTime, RT_BE2H_U32(Inode.TsCreatedModified.cSecEpoch)); RTTimeSpecAddNano(&pInode->ObjInfo.ChangeTime, RT_BE2H_U32(Inode.TsCreatedModified.cNanoSec)); pInode->ObjInfo.Attr.enmAdditional = RTFSOBJATTRADD_UNIX; pInode->ObjInfo.Attr.u.Unix.uid = RT_BE2H_U32(Inode.uUid); pInode->ObjInfo.Attr.u.Unix.gid = RT_BE2H_U32(Inode.uGid); pInode->ObjInfo.Attr.u.Unix.cHardlinks = RT_BE2H_U16(Inode.cOnLinks); /** @todo v2 inodes. */ pInode->ObjInfo.Attr.u.Unix.INodeIdDevice = 0; pInode->ObjInfo.Attr.u.Unix.INodeId = iInode; pInode->ObjInfo.Attr.u.Unix.fFlags = 0; pInode->ObjInfo.Attr.u.Unix.GenerationId = RT_BE2H_U32(Inode.cGeneration); pInode->ObjInfo.Attr.u.Unix.Device = 0; if (Inode.iVersion >= 3) { RTTimeSpecSetSeconds(&pInode->ObjInfo.BirthTime, RT_BE2H_U32(Inode.TsCreation.cSecEpoch)); RTTimeSpecAddNano(&pInode->ObjInfo.BirthTime, RT_BE2H_U32(Inode.TsCreation.cNanoSec)); } else pInode->ObjInfo.BirthTime = pInode->ObjInfo.ChangeTime; /* Fill in the mode. */ pInode->ObjInfo.Attr.fMode = 0; uint16_t fInodeMode = RT_BE2H_U16(Inode.fMode); switch (XFS_INODE_MODE_TYPE_GET_TYPE(fInodeMode)) { case XFS_INODE_MODE_TYPE_FIFO: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_FIFO; break; case XFS_INODE_MODE_TYPE_CHAR: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DEV_CHAR; break; case XFS_INODE_MODE_TYPE_DIR: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DIRECTORY; break; case XFS_INODE_MODE_TYPE_BLOCK: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DEV_BLOCK; break; case XFS_INODE_MODE_TYPE_REGULAR: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_FILE; break; case XFS_INODE_MODE_TYPE_SYMLINK: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_SYMLINK; break; case XFS_INODE_MODE_TYPE_SOCKET: pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_SOCKET; break; default: rc = VERR_VFS_BOGUS_FORMAT; } if (fInodeMode & XFS_INODE_MODE_EXEC_OTHER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXOTH; if (fInodeMode & XFS_INODE_MODE_WRITE_OTHER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWOTH; if (fInodeMode & XFS_INODE_MODE_READ_OTHER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IROTH; if (fInodeMode & XFS_INODE_MODE_EXEC_GROUP) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXGRP; if (fInodeMode & XFS_INODE_MODE_WRITE_GROUP) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWGRP; if (fInodeMode & XFS_INODE_MODE_READ_GROUP) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IRGRP; if (fInodeMode & XFS_INODE_MODE_EXEC_OWNER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXUSR; if (fInodeMode & XFS_INODE_MODE_WRITE_OWNER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWUSR; if (fInodeMode & XFS_INODE_MODE_READ_OWNER) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IRUSR; if (fInodeMode & XFS_INODE_MODE_STICKY) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISTXT; if (fInodeMode & XFS_INODE_MODE_SET_GROUP_ID) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISGID; if (fInodeMode & XFS_INODE_MODE_SET_USER_ID) pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISUID; } } else rc = VERR_NO_MEMORY; } else { /* Remove from current LRU list position and add to the beginning. */ uint32_t cRefs = ASMAtomicIncU32(&pInode->cRefs); if (cRefs == 1) /* Inodes get removed from the LRU list if they are referenced. */ RTListNodeRemove(&pInode->NdLru); } if (RT_SUCCESS(rc)) *ppInode = pInode; else if (pInode) { ASMAtomicDecU32(&pInode->cRefs); rtFsXfsInode_Free(pThis, pInode); /* Free the inode. */ } return rc; } /** * Releases a reference of the given inode. * * @returns nothing. * @param pThis The XFS volume instance. * @param pInode The inode to release. */ static void rtFsXfsInode_Release(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode) { uint32_t cRefs = ASMAtomicDecU32(&pInode->cRefs); if (!cRefs) rtFsXfsInode_Free(pThis, pInode); } /** * Worker for various QueryInfo methods. * * @returns IPRT status code. * @param pInode The inode structure to return info for. * @param pObjInfo Where to return object info. * @param enmAddAttr What additional info to return. */ static int rtFsXfsInode_QueryInfo(PRTFSXFSINODE pInode, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr) { RT_ZERO(*pObjInfo); pObjInfo->cbObject = pInode->ObjInfo.cbObject; pObjInfo->cbAllocated = pInode->ObjInfo.cbAllocated; pObjInfo->AccessTime = pInode->ObjInfo.AccessTime; pObjInfo->ModificationTime = pInode->ObjInfo.ModificationTime; pObjInfo->ChangeTime = pInode->ObjInfo.ChangeTime; pObjInfo->BirthTime = pInode->ObjInfo.BirthTime; pObjInfo->Attr.fMode = pInode->ObjInfo.Attr.fMode; pObjInfo->Attr.enmAdditional = enmAddAttr; switch (enmAddAttr) { case RTFSOBJATTRADD_UNIX: memcpy(&pObjInfo->Attr.u.Unix, &pInode->ObjInfo.Attr.u.Unix, sizeof(pInode->ObjInfo.Attr.u.Unix)); break; case RTFSOBJATTRADD_UNIX_OWNER: pObjInfo->Attr.u.UnixOwner.uid = pInode->ObjInfo.Attr.u.Unix.uid; break; case RTFSOBJATTRADD_UNIX_GROUP: pObjInfo->Attr.u.UnixGroup.gid = pInode->ObjInfo.Attr.u.Unix.gid; break; default: break; } return VINF_SUCCESS; } /** * Maps the given inode block to the destination filesystem block. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param pInode The inode structure to read from. * @param iBlock The inode block to map. * @param cBlocks Number of blocks requested. * @param piBlockFs Where to store the filesystem block on success. * @param pcBlocks Where to store the number of contiguous blocks on success. * @param pfSparse Where to store the sparse flag on success. * * @todo Optimize */ static int rtFsXfsInode_MapBlockToFs(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode, uint64_t iBlock, size_t cBlocks, uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse) { RT_NOREF(pThis, pInode, iBlock, cBlocks, piBlockFs, pcBlocks, pfSparse); return VERR_NOT_IMPLEMENTED; } /** * Reads data from the given inode at the given byte offset. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param pInode The inode structure to read from. * @param off The byte offset to start reading from. * @param pvBuf Where to store the read data to. * @param pcbRead Where to return the amount of data read. */ static int rtFsXfsInode_Read(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode, uint64_t off, void *pvBuf, size_t cbRead, size_t *pcbRead) { int rc = VINF_SUCCESS; uint8_t *pbBuf = (uint8_t *)pvBuf; if (((uint64_t)pInode->ObjInfo.cbObject < off + cbRead)) { if (!pcbRead) return VERR_EOF; else cbRead = (uint64_t)pInode->ObjInfo.cbObject - off; } while ( cbRead && RT_SUCCESS(rc)) { uint64_t iBlockStart = rtFsXfsDiskOffsetToBlockIdx(pThis, off); uint32_t offBlockStart = off % pThis->cbBlock; /* Resolve the inode block to the proper filesystem block. */ uint64_t iBlockFs = 0; size_t cBlocks = 0; bool fSparse = false; rc = rtFsXfsInode_MapBlockToFs(pThis, pInode, iBlockStart, 1, &iBlockFs, &cBlocks, &fSparse); if (RT_SUCCESS(rc)) { Assert(cBlocks == 1); size_t cbThisRead = RT_MIN(cbRead, pThis->cbBlock - offBlockStart); if (!fSparse) { uint64_t offRead = rtFsXfsBlockIdxToDiskOffset(pThis, iBlockFs); rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead + offBlockStart, pbBuf, cbThisRead, NULL); } else memset(pbBuf, 0, cbThisRead); if (RT_SUCCESS(rc)) { pbBuf += cbThisRead; cbRead -= cbThisRead; off += cbThisRead; if (pcbRead) *pcbRead += cbThisRead; } } } return rc; } /* * * File operations. * File operations. * File operations. * */ /** * @interface_method_impl{RTVFSOBJOPS,pfnClose} */ static DECLCALLBACK(int) rtFsXfsFile_Close(void *pvThis) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; LogFlow(("rtFsXfsFile_Close(%p/%p)\n", pThis, pThis->pInode)); rtFsXfsInode_Release(pThis->pVol, pThis->pInode); pThis->pInode = NULL; pThis->pVol = NULL; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo} */ static DECLCALLBACK(int) rtFsXfsFile_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; return rtFsXfsInode_QueryInfo(pThis->pInode, pObjInfo, enmAddAttr); } /** * @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead} */ static DECLCALLBACK(int) rtFsXfsFile_Read(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; AssertReturn(pSgBuf->cSegs == 1, VERR_INTERNAL_ERROR_3); RT_NOREF(fBlocking); if (off == -1) off = pThis->offFile; else AssertReturn(off >= 0, VERR_INTERNAL_ERROR_3); int rc; size_t cbRead = pSgBuf->paSegs[0].cbSeg; if (!pcbRead) { rc = rtFsXfsInode_Read(pThis->pVol, pThis->pInode, (uint64_t)off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL); if (RT_SUCCESS(rc)) pThis->offFile = off + cbRead; Log6(("rtFsXfsFile_Read: off=%#RX64 cbSeg=%#x -> %Rrc\n", off, pSgBuf->paSegs[0].cbSeg, rc)); } else { PRTFSXFSINODE pInode = pThis->pInode; if (off >= pInode->ObjInfo.cbObject) { *pcbRead = 0; rc = VINF_EOF; } else { if ((uint64_t)off + cbRead <= (uint64_t)pInode->ObjInfo.cbObject) rc = rtFsXfsInode_Read(pThis->pVol, pThis->pInode, (uint64_t)off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL); else { /* Return VINF_EOF if beyond end-of-file. */ cbRead = (size_t)(pInode->ObjInfo.cbObject - off); rc = rtFsXfsInode_Read(pThis->pVol, pThis->pInode, off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL); if (RT_SUCCESS(rc)) rc = VINF_EOF; } if (RT_SUCCESS(rc)) { pThis->offFile = off + cbRead; *pcbRead = cbRead; } else *pcbRead = 0; } Log6(("rtFsXfsFile_Read: off=%#RX64 cbSeg=%#x -> %Rrc *pcbRead=%#x\n", off, pSgBuf->paSegs[0].cbSeg, rc, *pcbRead)); } return rc; } /** * @interface_method_impl{RTVFSIOSTREAMOPS,pfnWrite} */ static DECLCALLBACK(int) rtFsXfsFile_Write(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten) { RT_NOREF(pvThis, off, pSgBuf, fBlocking, pcbWritten); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSIOSTREAMOPS,pfnFlush} */ static DECLCALLBACK(int) rtFsXfsFile_Flush(void *pvThis) { RT_NOREF(pvThis); return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell} */ static DECLCALLBACK(int) rtFsXfsFile_Tell(void *pvThis, PRTFOFF poffActual) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; *poffActual = pThis->offFile; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnMode} */ static DECLCALLBACK(int) rtFsXfsFile_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask) { RT_NOREF(pvThis, fMode, fMask); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes} */ static DECLCALLBACK(int) rtFsXfsFile_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime, PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime) { RT_NOREF(pvThis, pAccessTime, pModificationTime, pChangeTime, pBirthTime); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner} */ static DECLCALLBACK(int) rtFsXfsFile_SetOwner(void *pvThis, RTUID uid, RTGID gid) { RT_NOREF(pvThis, uid, gid); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSFILEOPS,pfnSeek} */ static DECLCALLBACK(int) rtFsXfsFile_Seek(void *pvThis, RTFOFF offSeek, unsigned uMethod, PRTFOFF poffActual) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; RTFOFF offNew; switch (uMethod) { case RTFILE_SEEK_BEGIN: offNew = offSeek; break; case RTFILE_SEEK_END: offNew = pThis->pInode->ObjInfo.cbObject + offSeek; break; case RTFILE_SEEK_CURRENT: offNew = (RTFOFF)pThis->offFile + offSeek; break; default: return VERR_INVALID_PARAMETER; } if (offNew >= 0) { pThis->offFile = offNew; *poffActual = offNew; return VINF_SUCCESS; } return VERR_NEGATIVE_SEEK; } /** * @interface_method_impl{RTVFSFILEOPS,pfnQuerySize} */ static DECLCALLBACK(int) rtFsXfsFile_QuerySize(void *pvThis, uint64_t *pcbFile) { PRTFSXFSFILE pThis = (PRTFSXFSFILE)pvThis; *pcbFile = (uint64_t)pThis->pInode->ObjInfo.cbObject; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSFILEOPS,pfnSetSize} */ static DECLCALLBACK(int) rtFsXfsFile_SetSize(void *pvThis, uint64_t cbFile, uint32_t fFlags) { RT_NOREF(pvThis, cbFile, fFlags); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSFILEOPS,pfnQueryMaxSize} */ static DECLCALLBACK(int) rtFsXfsFile_QueryMaxSize(void *pvThis, uint64_t *pcbMax) { RT_NOREF(pvThis); *pcbMax = INT64_MAX; /** @todo */ return VINF_SUCCESS; } /** * XFS file operations. */ static const RTVFSFILEOPS g_rtFsXfsFileOps = { { /* Stream */ { /* Obj */ RTVFSOBJOPS_VERSION, RTVFSOBJTYPE_FILE, "XFS File", rtFsXfsFile_Close, rtFsXfsFile_QueryInfo, RTVFSOBJOPS_VERSION }, RTVFSIOSTREAMOPS_VERSION, RTVFSIOSTREAMOPS_FEAT_NO_SG, rtFsXfsFile_Read, rtFsXfsFile_Write, rtFsXfsFile_Flush, NULL /*PollOne*/, rtFsXfsFile_Tell, NULL /*pfnSkip*/, NULL /*pfnZeroFill*/, RTVFSIOSTREAMOPS_VERSION, }, RTVFSFILEOPS_VERSION, 0, { /* ObjSet */ RTVFSOBJSETOPS_VERSION, RT_UOFFSETOF(RTVFSFILEOPS, ObjSet) - RT_UOFFSETOF(RTVFSFILEOPS, Stream.Obj), rtFsXfsFile_SetMode, rtFsXfsFile_SetTimes, rtFsXfsFile_SetOwner, RTVFSOBJSETOPS_VERSION }, rtFsXfsFile_Seek, rtFsXfsFile_QuerySize, rtFsXfsFile_SetSize, rtFsXfsFile_QueryMaxSize, RTVFSFILEOPS_VERSION }; /** * Creates a new VFS file from the given regular file inode. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param fOpen Open flags passed. * @param iInode The inode for the file. * @param phVfsFile Where to store the VFS file handle on success. * @param pErrInfo Where to record additional error information on error, optional. * @param pszWhat Logging prefix. */ static int rtFsXfsVol_NewFile(PRTFSXFSVOL pThis, uint64_t fOpen, uint32_t iInode, PRTVFSFILE phVfsFile, PRTERRINFO pErrInfo, const char *pszWhat) { /* * Load the inode and check that it really is a file. */ PRTFSXFSINODE pInode = NULL; int rc = rtFsXfsInode_Load(pThis, iInode, &pInode); if (RT_SUCCESS(rc)) { if (RTFS_IS_FILE(pInode->ObjInfo.Attr.fMode)) { PRTFSXFSFILE pNewFile; rc = RTVfsNewFile(&g_rtFsXfsFileOps, sizeof(*pNewFile), fOpen, pThis->hVfsSelf, NIL_RTVFSLOCK, phVfsFile, (void **)&pNewFile); if (RT_SUCCESS(rc)) { pNewFile->pVol = pThis; pNewFile->pInode = pInode; pNewFile->offFile = 0; } } else rc = RTERRINFO_LOG_SET_F(pErrInfo, VERR_NOT_A_FILE, "%s: fMode=%#RX32", pszWhat, pInode->ObjInfo.Attr.fMode); if (RT_FAILURE(rc)) rtFsXfsInode_Release(pThis, pInode); } return rc; } /* * * XFS directory code. * XFS directory code. * XFS directory code. * */ /** * Looks up an entry in the given directory inode. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param pInode The directory inode structure to. * @param pszEntry The entry to lookup. * @param piInode Where to store the inode number if the entry was found. */ static int rtFsXfsDir_Lookup(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode, const char *pszEntry, uint32_t *piInode) { uint64_t offEntry = 0; int rc = VERR_FILE_NOT_FOUND; uint32_t idxDirEntry = 0; size_t cchEntry = strlen(pszEntry); if (cchEntry > 255) return VERR_FILENAME_TOO_LONG; RT_NOREF(pThis, idxDirEntry, offEntry, pInode, piInode); #if 0 /** @todo */ while (offEntry < (uint64_t)pInode->ObjInfo.cbObject) { EXTDIRENTRYEX DirEntry; size_t cbThis = RT_MIN(sizeof(DirEntry), (uint64_t)pInode->ObjInfo.cbObject - offEntry); int rc2 = rtFsXfsInode_Read(pThis, pInode, offEntry, &DirEntry, cbThis, NULL); if (RT_SUCCESS(rc2)) { #ifdef LOG_ENABLED rtFsExtDirEntry_Log(pThis, idxDirEntry, &DirEntry); #endif uint16_t cbName = pThis->fFeaturesIncompat & EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE ? DirEntry.Core.u.v2.cbName : RT_LE2H_U16(DirEntry.Core.u.v1.cbName); if ( cchEntry == cbName && !memcmp(pszEntry, &DirEntry.Core.achName[0], cchEntry)) { *piInode = RT_LE2H_U32(DirEntry.Core.iInodeRef); rc = VINF_SUCCESS; break; } offEntry += RT_LE2H_U16(DirEntry.Core.cbRecord); idxDirEntry++; } else { rc = rc2; break; } } #endif return rc; } /* * * Directory instance methods * Directory instance methods * Directory instance methods * */ /** * @interface_method_impl{RTVFSOBJOPS,pfnClose} */ static DECLCALLBACK(int) rtFsXfsDir_Close(void *pvThis) { PRTFSXFSDIR pThis = (PRTFSXFSDIR)pvThis; LogFlowFunc(("pThis=%p\n", pThis)); rtFsXfsInode_Release(pThis->pVol, pThis->pInode); pThis->pInode = NULL; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo} */ static DECLCALLBACK(int) rtFsXfsDir_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr) { PRTFSXFSDIR pThis = (PRTFSXFSDIR)pvThis; LogFlowFunc(("\n")); return rtFsXfsInode_QueryInfo(pThis->pInode, pObjInfo, enmAddAttr); } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnMode} */ static DECLCALLBACK(int) rtFsXfsDir_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask) { LogFlowFunc(("\n")); RT_NOREF(pvThis, fMode, fMask); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes} */ static DECLCALLBACK(int) rtFsXfsDir_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime, PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime) { LogFlowFunc(("\n")); RT_NOREF(pvThis, pAccessTime, pModificationTime, pChangeTime, pBirthTime); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner} */ static DECLCALLBACK(int) rtFsXfsDir_SetOwner(void *pvThis, RTUID uid, RTGID gid) { LogFlowFunc(("\n")); RT_NOREF(pvThis, uid, gid); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSDIROPS,pfnOpen} */ static DECLCALLBACK(int) rtFsXfsDir_Open(void *pvThis, const char *pszEntry, uint64_t fOpen, uint32_t fFlags, PRTVFSOBJ phVfsObj) { LogFlowFunc(("pszEntry='%s' fOpen=%#RX64 fFlags=%#x\n", pszEntry, fOpen, fFlags)); PRTFSXFSDIR pThis = (PRTFSXFSDIR)pvThis; PRTFSXFSVOL pVol = pThis->pVol; int rc = VINF_SUCCESS; RT_NOREF(pThis, pVol, phVfsObj, pszEntry, fFlags); /* * We cannot create or replace anything, just open stuff. */ if ( (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN_CREATE) { /* likely */ } else return VERR_WRITE_PROTECT; /* * Lookup the entry. */ uint32_t iInode = 0; rc = rtFsXfsDir_Lookup(pVol, pThis->pInode, pszEntry, &iInode); if (RT_SUCCESS(rc)) { PRTFSXFSINODE pInode = NULL; rc = rtFsXfsInode_Load(pVol, iInode, &pInode); if (RT_SUCCESS(rc)) { if (RTFS_IS_DIRECTORY(pInode->ObjInfo.Attr.fMode)) { RTVFSDIR hVfsDir; rc = rtFsXfsVol_OpenDirByInode(pVol, iInode, &hVfsDir); if (RT_SUCCESS(rc)) { *phVfsObj = RTVfsObjFromDir(hVfsDir); RTVfsDirRelease(hVfsDir); AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3); } } else if (RTFS_IS_FILE(pInode->ObjInfo.Attr.fMode)) { RTVFSFILE hVfsFile; rc = rtFsXfsVol_NewFile(pVol, fOpen, iInode, &hVfsFile, NULL, pszEntry); if (RT_SUCCESS(rc)) { *phVfsObj = RTVfsObjFromFile(hVfsFile); RTVfsFileRelease(hVfsFile); AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3); } } else rc = VERR_NOT_SUPPORTED; } } LogFlow(("rtFsXfsDir_Open(%s): returns %Rrc\n", pszEntry, rc)); return rc; } /** * @interface_method_impl{RTVFSDIROPS,pfnCreateDir} */ static DECLCALLBACK(int) rtFsXfsDir_CreateDir(void *pvThis, const char *pszSubDir, RTFMODE fMode, PRTVFSDIR phVfsDir) { RT_NOREF(pvThis, pszSubDir, fMode, phVfsDir); LogFlowFunc(("\n")); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSDIROPS,pfnOpenSymlink} */ static DECLCALLBACK(int) rtFsXfsDir_OpenSymlink(void *pvThis, const char *pszSymlink, PRTVFSSYMLINK phVfsSymlink) { RT_NOREF(pvThis, pszSymlink, phVfsSymlink); LogFlowFunc(("\n")); return VERR_NOT_SUPPORTED; } /** * @interface_method_impl{RTVFSDIROPS,pfnCreateSymlink} */ static DECLCALLBACK(int) rtFsXfsDir_CreateSymlink(void *pvThis, const char *pszSymlink, const char *pszTarget, RTSYMLINKTYPE enmType, PRTVFSSYMLINK phVfsSymlink) { RT_NOREF(pvThis, pszSymlink, pszTarget, enmType, phVfsSymlink); LogFlowFunc(("\n")); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSDIROPS,pfnUnlinkEntry} */ static DECLCALLBACK(int) rtFsXfsDir_UnlinkEntry(void *pvThis, const char *pszEntry, RTFMODE fType) { RT_NOREF(pvThis, pszEntry, fType); LogFlowFunc(("\n")); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSDIROPS,pfnRenameEntry} */ static DECLCALLBACK(int) rtFsXfsDir_RenameEntry(void *pvThis, const char *pszEntry, RTFMODE fType, const char *pszNewName) { RT_NOREF(pvThis, pszEntry, fType, pszNewName); LogFlowFunc(("\n")); return VERR_WRITE_PROTECT; } /** * @interface_method_impl{RTVFSDIROPS,pfnRewindDir} */ static DECLCALLBACK(int) rtFsXfsDir_RewindDir(void *pvThis) { PRTFSXFSDIR pThis = (PRTFSXFSDIR)pvThis; LogFlowFunc(("\n")); pThis->fNoMoreFiles = false; pThis->offEntry = 0; pThis->idxEntry = 0; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSDIROPS,pfnReadDir} */ static DECLCALLBACK(int) rtFsXfsDir_ReadDir(void *pvThis, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAddAttr) { PRTFSXFSDIR pThis = (PRTFSXFSDIR)pvThis; PRTFSXFSINODE pInode = pThis->pInode; LogFlowFunc(("\n")); if (pThis->fNoMoreFiles) return VERR_NO_MORE_FILES; RT_NOREF(pInode, pDirEntry, pcbDirEntry, enmAddAttr); return VERR_NOT_IMPLEMENTED; } /** * XFS directory operations. */ static const RTVFSDIROPS g_rtFsXfsDirOps = { { /* Obj */ RTVFSOBJOPS_VERSION, RTVFSOBJTYPE_DIR, "XFS Dir", rtFsXfsDir_Close, rtFsXfsDir_QueryInfo, RTVFSOBJOPS_VERSION }, RTVFSDIROPS_VERSION, 0, { /* ObjSet */ RTVFSOBJSETOPS_VERSION, RT_UOFFSETOF(RTVFSDIROPS, ObjSet) - RT_UOFFSETOF(RTVFSDIROPS, Obj), rtFsXfsDir_SetMode, rtFsXfsDir_SetTimes, rtFsXfsDir_SetOwner, RTVFSOBJSETOPS_VERSION }, rtFsXfsDir_Open, NULL /* pfnFollowAbsoluteSymlink */, NULL /* pfnOpenFile */, NULL /* pfnOpenDir */, rtFsXfsDir_CreateDir, rtFsXfsDir_OpenSymlink, rtFsXfsDir_CreateSymlink, NULL /* pfnQueryEntryInfo */, rtFsXfsDir_UnlinkEntry, rtFsXfsDir_RenameEntry, rtFsXfsDir_RewindDir, rtFsXfsDir_ReadDir, RTVFSDIROPS_VERSION, }; /** * Opens a directory by the given inode. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param iInode The inode to open. * @param phVfsDir Where to store the handle to the VFS directory on success. */ static int rtFsXfsVol_OpenDirByInode(PRTFSXFSVOL pThis, uint32_t iInode, PRTVFSDIR phVfsDir) { PRTFSXFSINODE pInode = NULL; int rc = rtFsXfsInode_Load(pThis, iInode, &pInode); if (RT_SUCCESS(rc)) { if (RTFS_IS_DIRECTORY(pInode->ObjInfo.Attr.fMode)) { PRTFSXFSDIR pNewDir; rc = RTVfsNewDir(&g_rtFsXfsDirOps, sizeof(*pNewDir), 0 /*fFlags*/, pThis->hVfsSelf, NIL_RTVFSLOCK, phVfsDir, (void **)&pNewDir); if (RT_SUCCESS(rc)) { pNewDir->fNoMoreFiles = false; pNewDir->pVol = pThis; pNewDir->pInode = pInode; } } else rc = VERR_VFS_BOGUS_FORMAT; if (RT_FAILURE(rc)) rtFsXfsInode_Release(pThis, pInode); } return rc; } /* * * Volume level code. * Volume level code. * Volume level code. * */ static DECLCALLBACK(int) rtFsXfsVolAgTreeDestroy(PAVLU32NODECORE pCore, void *pvUser) { RT_NOREF(pvUser); PRTFSXFSAG pAg = (PRTFSXFSAG)pCore; Assert(!pAg->cRefs); RTMemFree(pAg); return VINF_SUCCESS; } static DECLCALLBACK(int) rtFsXfsVolInodeTreeDestroy(PAVLU64NODECORE pCore, void *pvUser) { RT_NOREF(pvUser); PRTFSXFSINODE pInode = (PRTFSXFSINODE)pCore; Assert(!pInode->cRefs); RTMemFree(pInode); return VINF_SUCCESS; } static DECLCALLBACK(int) rtFsXfsVolBlockTreeDestroy(PAVLU64NODECORE pCore, void *pvUser) { RT_NOREF(pvUser); PRTFSXFSBLOCKENTRY pBlock = (PRTFSXFSBLOCKENTRY)pCore; Assert(!pBlock->cRefs); RTMemFree(pBlock); return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSOBJOPS::Obj,pfnClose} */ static DECLCALLBACK(int) rtFsXfsVol_Close(void *pvThis) { PRTFSXFSVOL pThis = (PRTFSXFSVOL)pvThis; /* Destroy the block group tree. */ RTAvlU32Destroy(&pThis->AgRoot, rtFsXfsVolAgTreeDestroy, pThis); pThis->AgRoot = NULL; RTListInit(&pThis->LstAgLru); /* Destroy the inode tree. */ RTAvlU64Destroy(&pThis->InodeRoot, rtFsXfsVolInodeTreeDestroy, pThis); pThis->InodeRoot = NULL; RTListInit(&pThis->LstInodeLru); /* Destroy the block cache tree. */ RTAvlU64Destroy(&pThis->BlockRoot, rtFsXfsVolBlockTreeDestroy, pThis); pThis->BlockRoot = NULL; RTListInit(&pThis->LstBlockLru); /* * Backing file and handles. */ RTVfsFileRelease(pThis->hVfsBacking); pThis->hVfsBacking = NIL_RTVFSFILE; pThis->hVfsSelf = NIL_RTVFS; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSOBJOPS::Obj,pfnQueryInfo} */ static DECLCALLBACK(int) rtFsXfsVol_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr) { RT_NOREF(pvThis, pObjInfo, enmAddAttr); return VERR_WRONG_TYPE; } /** * @interface_method_impl{RTVFSOBJOPS::Obj,pfnOpenRoot} */ static DECLCALLBACK(int) rtFsXfsVol_OpenRoot(void *pvThis, PRTVFSDIR phVfsDir) { PRTFSXFSVOL pThis = (PRTFSXFSVOL)pvThis; int rc = rtFsXfsVol_OpenDirByInode(pThis, pThis->uInodeRoot, phVfsDir); LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** * @interface_method_impl{RTVFSOBJOPS::Obj,pfnQueryRangeState} */ static DECLCALLBACK(int) rtFsXfsVol_QueryRangeState(void *pvThis, uint64_t off, size_t cb, bool *pfUsed) { RT_NOREF(pvThis, off, cb, pfUsed); return VERR_NOT_IMPLEMENTED; } DECL_HIDDEN_CONST(const RTVFSOPS) g_rtFsXfsVolOps = { /* .Obj = */ { /* .uVersion = */ RTVFSOBJOPS_VERSION, /* .enmType = */ RTVFSOBJTYPE_VFS, /* .pszName = */ "XfsVol", /* .pfnClose = */ rtFsXfsVol_Close, /* .pfnQueryInfo = */ rtFsXfsVol_QueryInfo, /* .uEndMarker = */ RTVFSOBJOPS_VERSION }, /* .uVersion = */ RTVFSOPS_VERSION, /* .fFeatures = */ 0, /* .pfnOpenRoot = */ rtFsXfsVol_OpenRoot, /* .pfnQueryRangeState = */ rtFsXfsVol_QueryRangeState, /* .uEndMarker = */ RTVFSOPS_VERSION }; /** * Loads and parses the AGI block. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param pErrInfo Where to return additional error info. */ static int rtFsXfsVolLoadAgi(PRTFSXFSVOL pThis, PRTERRINFO pErrInfo) { XFSAGI Agi; int rc = RTVfsFileReadAt(pThis->hVfsBacking, 2 * pThis->cbSector, &Agi, sizeof(&Agi), NULL); if (RT_SUCCESS(rc)) { #ifdef LOG_ENABLED rtFsXfsAgi_Log(0, &Agi); #endif /** @todo Verification */ RT_NOREF(pErrInfo); } return rc; } /** * Loads and parses the superblock of the filesystem. * * @returns IPRT status code. * @param pThis The XFS volume instance. * @param pErrInfo Where to return additional error info. */ static int rtFsXfsVolLoadAndParseSuperblock(PRTFSXFSVOL pThis, PRTERRINFO pErrInfo) { int rc = VINF_SUCCESS; XFSSUPERBLOCK Sb; rc = RTVfsFileReadAt(pThis->hVfsBacking, XFS_SB_OFFSET, &Sb, sizeof(XFSSUPERBLOCK), NULL); if (RT_FAILURE(rc)) return RTERRINFO_LOG_SET(pErrInfo, rc, "Error reading super block"); /* Validate the superblock. */ if (RT_BE2H_U32(Sb.u32Magic) != XFS_SB_MAGIC) return RTERRINFO_LOG_SET_F(pErrInfo, VERR_VFS_UNKNOWN_FORMAT, "Not XFS - Signature mismatch: %RX32", RT_BE2H_U32(Sb.u32Magic)); #ifdef LOG_ENABLED rtFsXfsSb_Log(0, &Sb); #endif /** @todo More verification */ pThis->cbSector = RT_BE2H_U32(Sb.cbSector); pThis->cbBlock = RT_BE2H_U32(Sb.cbBlock); pThis->cBlockShift = Sb.cBlockSzLog; pThis->cBlocksPerAg = RT_BE2H_U32(Sb.cAgBlocks); pThis->cAgs = RT_BE2H_U32(Sb.cAg); pThis->uInodeRoot = RT_BE2H_U64(Sb.uInodeRoot); pThis->cbInode = RT_BE2H_U16(Sb.cbInode); pThis->cInodesPerBlock = RT_BE2H_U16(Sb.cInodesPerBlock); pThis->cAgBlocksLog = Sb.cAgBlocksLog; pThis->cInodesPerBlockLog = Sb.cInodesPerBlockLog; return rc; } RTDECL(int) RTFsXfsVolOpen(RTVFSFILE hVfsFileIn, uint32_t fMntFlags, uint32_t fXfsFlags, PRTVFS phVfs, PRTERRINFO pErrInfo) { AssertPtrReturn(phVfs, VERR_INVALID_POINTER); AssertReturn(!(fMntFlags & ~RTVFSMNT_F_VALID_MASK), VERR_INVALID_FLAGS); AssertReturn(!fXfsFlags, VERR_INVALID_FLAGS); uint32_t cRefs = RTVfsFileRetain(hVfsFileIn); AssertReturn(cRefs != UINT32_MAX, VERR_INVALID_HANDLE); /* * Create a VFS instance and initialize the data so rtFsXfsVol_Close works. */ RTVFS hVfs; PRTFSXFSVOL pThis; int rc = RTVfsNew(&g_rtFsXfsVolOps, sizeof(*pThis), NIL_RTVFS, RTVFSLOCK_CREATE_RW, &hVfs, (void **)&pThis); if (RT_SUCCESS(rc)) { pThis->hVfsBacking = hVfsFileIn; pThis->hVfsSelf = hVfs; pThis->fMntFlags = fMntFlags; pThis->fXfsFlags = fXfsFlags; pThis->AgRoot = NULL; pThis->InodeRoot = NULL; pThis->BlockRoot = NULL; pThis->cbAgs = 0; pThis->cbInodes = 0; pThis->cbBlocks = 0; RTListInit(&pThis->LstAgLru); RTListInit(&pThis->LstInodeLru); RTListInit(&pThis->LstBlockLru); rc = RTVfsFileGetSize(pThis->hVfsBacking, &pThis->cbBacking); if (RT_SUCCESS(rc)) { rc = rtFsXfsVolLoadAndParseSuperblock(pThis, pErrInfo); if (RT_SUCCESS(rc)) rc = rtFsXfsVolLoadAgi(pThis, pErrInfo); if (RT_SUCCESS(rc)) { *phVfs = hVfs; return VINF_SUCCESS; } } RTVfsRelease(hVfs); *phVfs = NIL_RTVFS; } else RTVfsFileRelease(hVfsFileIn); return rc; } /** * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnValidate} */ static DECLCALLBACK(int) rtVfsChainXfsVol_Validate(PCRTVFSCHAINELEMENTREG pProviderReg, PRTVFSCHAINSPEC pSpec, PRTVFSCHAINELEMSPEC pElement, uint32_t *poffError, PRTERRINFO pErrInfo) { RT_NOREF(pProviderReg); /* * Basic checks. */ if (pElement->enmTypeIn != RTVFSOBJTYPE_FILE) return pElement->enmTypeIn == RTVFSOBJTYPE_INVALID ? VERR_VFS_CHAIN_CANNOT_BE_FIRST_ELEMENT : VERR_VFS_CHAIN_TAKES_FILE; if ( pElement->enmType != RTVFSOBJTYPE_VFS && pElement->enmType != RTVFSOBJTYPE_DIR) return VERR_VFS_CHAIN_ONLY_DIR_OR_VFS; if (pElement->cArgs > 1) return VERR_VFS_CHAIN_AT_MOST_ONE_ARG; /* * Parse the flag if present, save in pElement->uProvider. */ bool fReadOnly = (pSpec->fOpenFile & RTFILE_O_ACCESS_MASK) == RTFILE_O_READ; if (pElement->cArgs > 0) { const char *psz = pElement->paArgs[0].psz; if (*psz) { if (!strcmp(psz, "ro")) fReadOnly = true; else if (!strcmp(psz, "rw")) fReadOnly = false; else { *poffError = pElement->paArgs[0].offSpec; return RTErrInfoSet(pErrInfo, VERR_VFS_CHAIN_INVALID_ARGUMENT, "Expected 'ro' or 'rw' as argument"); } } } pElement->uProvider = fReadOnly ? RTVFSMNT_F_READ_ONLY : 0; return VINF_SUCCESS; } /** * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnInstantiate} */ static DECLCALLBACK(int) rtVfsChainXfsVol_Instantiate(PCRTVFSCHAINELEMENTREG pProviderReg, PCRTVFSCHAINSPEC pSpec, PCRTVFSCHAINELEMSPEC pElement, RTVFSOBJ hPrevVfsObj, PRTVFSOBJ phVfsObj, uint32_t *poffError, PRTERRINFO pErrInfo) { RT_NOREF(pProviderReg, pSpec, poffError); int rc; RTVFSFILE hVfsFileIn = RTVfsObjToFile(hPrevVfsObj); if (hVfsFileIn != NIL_RTVFSFILE) { RTVFS hVfs; rc = RTFsXfsVolOpen(hVfsFileIn, (uint32_t)pElement->uProvider, (uint32_t)(pElement->uProvider >> 32), &hVfs, pErrInfo); RTVfsFileRelease(hVfsFileIn); if (RT_SUCCESS(rc)) { *phVfsObj = RTVfsObjFromVfs(hVfs); RTVfsRelease(hVfs); if (*phVfsObj != NIL_RTVFSOBJ) return VINF_SUCCESS; rc = VERR_VFS_CHAIN_CAST_FAILED; } } else rc = VERR_VFS_CHAIN_CAST_FAILED; return rc; } /** * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnCanReuseElement} */ static DECLCALLBACK(bool) rtVfsChainXfsVol_CanReuseElement(PCRTVFSCHAINELEMENTREG pProviderReg, PCRTVFSCHAINSPEC pSpec, PCRTVFSCHAINELEMSPEC pElement, PCRTVFSCHAINSPEC pReuseSpec, PCRTVFSCHAINELEMSPEC pReuseElement) { RT_NOREF(pProviderReg, pSpec, pReuseSpec); if ( pElement->paArgs[0].uProvider == pReuseElement->paArgs[0].uProvider || !pReuseElement->paArgs[0].uProvider) return true; return false; } /** VFS chain element 'xfs'. */ static RTVFSCHAINELEMENTREG g_rtVfsChainXfsVolReg = { /* uVersion = */ RTVFSCHAINELEMENTREG_VERSION, /* fReserved = */ 0, /* pszName = */ "xfs", /* ListEntry = */ { NULL, NULL }, /* pszHelp = */ "Open a XFS file system, requires a file object on the left side.\n" "First argument is an optional 'ro' (read-only) or 'rw' (read-write) flag.\n", /* pfnValidate = */ rtVfsChainXfsVol_Validate, /* pfnInstantiate = */ rtVfsChainXfsVol_Instantiate, /* pfnCanReuseElement = */ rtVfsChainXfsVol_CanReuseElement, /* uEndMarker = */ RTVFSCHAINELEMENTREG_VERSION }; RTVFSCHAIN_AUTO_REGISTER_ELEMENT_PROVIDER(&g_rtVfsChainXfsVolReg, rtVfsChainXfsVolReg);