diff options
Diffstat (limited to 'src/VBox/Runtime/common/fs/xfsvfs.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/fs/xfsvfs.cpp | 2460 |
1 files changed, 2460 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/fs/xfsvfs.cpp b/src/VBox/Runtime/common/fs/xfsvfs.cpp new file mode 100644 index 00000000..8d430f1b --- /dev/null +++ b/src/VBox/Runtime/common/fs/xfsvfs.cpp @@ -0,0 +1,2460 @@ +/* $Id: xfsvfs.cpp $ */ +/** @file + * IPRT - XFS Virtual Filesystem. + */ + +/* + * Copyright (C) 2018-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP RTLOGGROUP_FS +#include <iprt/fsvfs.h> + +#include <iprt/asm.h> +#include <iprt/assert.h> +#include <iprt/avl.h> +#include <iprt/file.h> +#include <iprt/err.h> +#include <iprt/list.h> +#include <iprt/log.h> +#include <iprt/mem.h> +#include <iprt/string.h> +#include <iprt/vfs.h> +#include <iprt/vfslowlevel.h> +#include <iprt/formats/xfs.h> + + +/********************************************************************************************************************************* +* 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; + /** Inode version. */ + uint8_t uVersion; + /** Number of extents in the data fork for XFS_INODE_FORMAT_EXTENTS. */ + uint32_t cExtentsData; + /** Raw inode data. */ + uint8_t abData[1]; +} 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. + * + * @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 <todo>\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 <todo>\n")); + Log2(("XFS: uInodeRm %#RX64\n", RT_BE2H_U64(pSb->uInodeRm))); + } +} + +#if 0 /* unused */ +/** + * Logs a AG free space block. + * + * @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 <todo>\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))); + } +} +#endif + +/** + * Loads an AG inode information block. + * + * @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] <todo>\n")); + Log2(("XFS: abUuid <todo>\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. + * + * @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 <todo>\n")); + } +} + + +#if 0 +/** + * Logs a XFS filesystem directory entry. + * + * @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. + * + * @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; +} + + +/** + * Returns the size of the core inode structure on disk for the given version. + * + * @returns Size of the on disk inode structure in bytes. + * @param uVersion The inode version. + */ +DECLINLINE(size_t) rtFsXfsInodeGetSz(uint8_t uVersion) +{ + if (uVersion < 3) + return RT_OFFSETOF(XFSINODECORE, uChkSum); + return sizeof(XFSINODECORE); +} + + +/** + * Returns the pointer to the data fork of the given inode. + * + * @returns Pointer to the data fork. + * @param pThis The XFS volume instance. + * @param pInode The inode to get the data fork for. + * @param pcb Where to store the size of the remaining data area beginning with the fork. + */ +DECLINLINE(void *) rtFsXfsInodeGetDataFork(PRTFSXFSVOL pThis, PRTFSXFSINODE pInode, size_t *pcb) +{ + size_t offDataFork = rtFsXfsInodeGetSz(pInode->uVersion); + size_t cbInodeData = pThis->cbInode - offDataFork; + if (pcb) + *pcb = cbInodeData; + + return &pInode->abData[offDataFork]; +} + + +/** + * 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. + * + * @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. + * + * @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); +} + +#if 0 /* unused */ +/** + * 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. + * + * @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. + * + * @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); +} +#endif + +/** + * 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) +{ + size_t cbAlloc = RT_UOFFSETOF_DYN(RTFSXFSINODE, abData[pThis->cbInode]); + PRTFSXFSINODE pInode = (PRTFSXFSINODE)RTMemAllocZ(cbAlloc); + if (RT_LIKELY(pInode)) + { + pInode->Core.Key = iInode; + pInode->cRefs = 0; + pThis->cbInodes += cbAlloc; + } + + return pInode; +} + + +/** + * Frees the given inode. + * + * @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 -= RT_UOFFSETOF_DYN(RTFSXFSINODE, abData[pThis->cbInode]); + } +} + + +/** + * 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 + RT_UOFFSETOF_DYN(RTFSXFSINODE, abData[pThis->cbInode]) <= 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; + rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &pInode->abData[0], pThis->cbInode, NULL); + if (RT_SUCCESS(rc)) + { + PCXFSINODECORE pInodeCore = (PCXFSINODECORE)&pInode->abData[0]; + +#ifdef LOG_ENABLED + rtFsXfsInode_Log(pThis, iInode, pInodeCore); +#endif + + pInode->offInode = offRead; + pInode->fFlags = RT_BE2H_U16(pInodeCore->fFlags); + pInode->enmFormat = pInodeCore->enmFormat; + pInode->cExtentsData = RT_BE2H_U32(pInodeCore->cExtentsData); + pInode->ObjInfo.cbObject = RT_BE2H_U64(pInodeCore->cbInode); + pInode->ObjInfo.cbAllocated = RT_BE2H_U64(pInodeCore->cBlocks) * pThis->cbBlock; + RTTimeSpecSetSeconds(&pInode->ObjInfo.AccessTime, RT_BE2H_U32(pInodeCore->TsLastAccessed.cSecEpoch)); + RTTimeSpecAddNano(&pInode->ObjInfo.AccessTime, RT_BE2H_U32(pInodeCore->TsLastAccessed.cNanoSec)); + RTTimeSpecSetSeconds(&pInode->ObjInfo.ModificationTime, RT_BE2H_U32(pInodeCore->TsLastModified.cSecEpoch)); + RTTimeSpecAddNano(&pInode->ObjInfo.ModificationTime, RT_BE2H_U32(pInodeCore->TsLastModified.cNanoSec)); + RTTimeSpecSetSeconds(&pInode->ObjInfo.ChangeTime, RT_BE2H_U32(pInodeCore->TsCreatedModified.cSecEpoch)); + RTTimeSpecAddNano(&pInode->ObjInfo.ChangeTime, RT_BE2H_U32(pInodeCore->TsCreatedModified.cNanoSec)); + pInode->ObjInfo.Attr.enmAdditional = RTFSOBJATTRADD_UNIX; + pInode->ObjInfo.Attr.u.Unix.uid = RT_BE2H_U32(pInodeCore->uUid); + pInode->ObjInfo.Attr.u.Unix.gid = RT_BE2H_U32(pInodeCore->uGid); + pInode->ObjInfo.Attr.u.Unix.cHardlinks = RT_BE2H_U16(pInodeCore->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(pInodeCore->cGeneration); + pInode->ObjInfo.Attr.u.Unix.Device = 0; + if (pInodeCore->iVersion >= 3) + { + RTTimeSpecSetSeconds(&pInode->ObjInfo.BirthTime, RT_BE2H_U32(pInodeCore->TsCreation.cSecEpoch)); + RTTimeSpecAddNano(&pInode->ObjInfo.BirthTime, RT_BE2H_U32(pInodeCore->TsCreation.cNanoSec)); + } + else + pInode->ObjInfo.BirthTime = pInode->ObjInfo.ChangeTime; + + /* Fill in the mode. */ + pInode->ObjInfo.Attr.fMode = 0; + uint16_t fInodeMode = RT_BE2H_U16(pInodeCore->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. + * + * @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; +} + + +/** + * Locates the location of the next level in the B+Tree mapping the given offset. + * + * @returns Filesystem block number where the next level of the B+Tree is stored. + * @param paoffFile Array of file offset mappings. + * @param pauFsBlock Array of filesystem block mappings. + * @param cEntries Number of entries in the extent index node array. + * @param iBlock The block to resolve. + */ +DECLINLINE(XFSDFSBNO) rtFsXfsInode_BTreeNdLocateNextLvl(XFSDFILOFF *paoffFile, XFSDFSBNO *pauFsBlock, + uint16_t cEntries, XFSDFILOFF offFile) +{ + for (uint32_t i = 1; i < cEntries; i++) + { + if ( RT_BE2H_U64(paoffFile[i - 1]) <= offFile + && RT_BE2H_U64(paoffFile[i]) > offFile) + return RT_BE2H_U64(pauFsBlock[i]); + } + + /* Nothing found so far, the last entry must cover the block as the array is sorted. */ + return RT_BE2H_U64(pauFsBlock[cEntries - 1]); +} + + +/** + * Locates the extent mapping the file offset in the given extents list. + * + * @returns IPRT status. + * @param pExtents The array of extents to search. + * @param cEntries Number of entries in the array. + * @param uBlock The file offset to search the matching mapping for. + * @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. + */ +DECLINLINE(int) rtFsXfsInode_ExtentLocate(PCXFSEXTENT paExtents, uint16_t cEntries, XFSDFILOFF uBlock, + size_t cBlocks, uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse) +{ + int rc = VERR_VFS_BOGUS_FORMAT; + + for (uint32_t i = 0; i < cEntries; i++) + { + PCXFSEXTENT pExtent = &paExtents[i]; + uint64_t iBlockExtent = XFS_EXTENT_GET_LOGICAL_BLOCK(pExtent); + size_t cBlocksExtent = XFS_EXTENT_GET_BLOCK_COUNT(pExtent); + + if ( uBlock >= iBlockExtent + && uBlock < iBlockExtent + cBlocksExtent) + { + uint64_t offExtentBlocks = uBlock - iBlockExtent; + *piBlockFs = XFS_EXTENT_GET_DISK_BLOCK(pExtent) + offExtentBlocks; + *pcBlocks = RT_MIN(cBlocks, cBlocksExtent - offExtentBlocks); + *pfSparse = XFS_EXTENT_IS_UNWRITTEN(pExtent); + rc = VINF_SUCCESS; + break; + } + } + + return rc; +} + + +/** + * Validates the given node header. + * + * @returns IPRT status code. + * @param pThis The XFS volume instance. + * @param pNd The node header to validate. + * @param iLvl The current level. + */ +static int rtFsXfsInode_BTreeNdValidate(PRTFSXFSVOL pThis, PCXFSBTREENODEHDR pNd, uint16_t iLvl) +{ + RT_NOREF(pThis, pNd, iLvl); + /** @todo */ + 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) +{ + int rc = VINF_SUCCESS; + + switch (pInode->enmFormat) + { + case XFS_INODE_FORMAT_EXTENTS: + { + size_t cbRemaining = 0; + PCXFSEXTENT paExtents = (PCXFSEXTENT)rtFsXfsInodeGetDataFork(pThis, pInode, &cbRemaining); + + if (cbRemaining <= pInode->cExtentsData * sizeof(XFSEXTENT)) + rc = rtFsXfsInode_ExtentLocate(paExtents, pInode->cExtentsData, cBlocks, iBlock, + piBlockFs, pcBlocks, pfSparse); + else + rc = VERR_VFS_BOGUS_FORMAT; + break; + } + case XFS_INODE_FORMAT_BTREE: + { + size_t cbRemaining = 0; + PCXFSBTREEROOTHDR pRoot = (PCXFSBTREEROOTHDR)rtFsXfsInodeGetDataFork(pThis, pInode, &cbRemaining); + if (cbRemaining >= RT_BE2H_U16(pRoot->cRecs) * (sizeof(XFSDFSBNO) + sizeof(XFSDFILOFF)) + sizeof(XFSBTREEROOTHDR)) + { + XFSDFILOFF *poffFile = (XFSDFILOFF *)(pRoot + 1); + XFSDFSBNO *puFsBlock = (XFSDFSBNO *)(&poffFile[RT_BE2H_U16(pRoot->cRecs)]); + + XFSDFSBNO uFsBlock = rtFsXfsInode_BTreeNdLocateNextLvl(poffFile, puFsBlock, RT_BE2H_U16(pRoot->cRecs), + iBlock); + uint16_t iLvl = RT_BE2H_U16(pRoot->iLvl) - 1; + + /* Resolve intermediate levels. */ + while ( iLvl > 0 + && RT_SUCCESS(rc)) + { + PRTFSXFSBLOCKENTRY pEntry; + PCXFSBTREENODEHDR pNd; + + rc = rtFsXfsVol_BlockLoad(pThis, uFsBlock, &pEntry, (void **)&pNd); + if (RT_SUCCESS(rc)) + { + rc = rtFsXfsInode_BTreeNdValidate(pThis, pNd, iLvl); + if (RT_SUCCESS(rc)) + { + poffFile = (XFSDFILOFF *)(pNd + 1); + puFsBlock = (XFSDFSBNO *)(&poffFile[RT_BE2H_U16(pNd->cRecs)]); + uFsBlock = rtFsXfsInode_BTreeNdLocateNextLvl(poffFile, puFsBlock, RT_BE2H_U16(pRoot->cRecs), + iBlock); + iLvl--; + } + rtFsXfsVol_BlockRelease(pThis, pEntry); + } + } + + /* Load the leave node and parse it. */ + if (RT_SUCCESS(rc)) + { + PRTFSXFSBLOCKENTRY pEntry; + PCXFSBTREENODEHDR pNd; + + rc = rtFsXfsVol_BlockLoad(pThis, uFsBlock, &pEntry, (void **)&pNd); + if (RT_SUCCESS(rc)) + { + rc = rtFsXfsInode_BTreeNdValidate(pThis, pNd, iLvl); + if (RT_SUCCESS(rc)) + { + PCXFSEXTENT paExtents = (PCXFSEXTENT)(pNd + 1); + rc = rtFsXfsInode_ExtentLocate(paExtents, RT_BE2H_U16(pNd->cRecs), cBlocks, iBlock, + piBlockFs, pcBlocks, pfSparse); + } + rtFsXfsVol_BlockRelease(pThis, pEntry); + } + } + } + else + rc = VERR_VFS_BOGUS_FORMAT; + break; + } + case XFS_INODE_FORMAT_LOCAL: + case XFS_INODE_FORMAT_UUID: + case XFS_INODE_FORMAT_DEV: + default: + rc = VERR_VFS_BOGUS_FORMAT; + } + + return rc; +} + + +/** + * 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; + } + + if (pInode->enmFormat == XFS_INODE_FORMAT_LOCAL) + { + /* Fast path when the data is inlined in the inode. */ + size_t cbRemaining = 0; + uint8_t *pbSrc = (uint8_t *)rtFsXfsInodeGetDataFork(pThis, pInode, &cbRemaining); + if (off + cbRemaining <= (uint64_t)pInode->ObjInfo.cbObject) + { + memcpy(pvBuf, &pbSrc[off], cbRead); + *pcbRead = cbRead; + } + else + rc = VERR_VFS_BOGUS_FORMAT; + + return rc; + } + + 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, + NULL, + 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, + NULL, + 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, + /* .pfnQueryInfoEx = */ NULL, + /* .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 = RTVfsFileQuerySize(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); + |