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Diffstat (limited to 'dev/kernel/src/FS/NeFS.cc')
| -rw-r--r-- | dev/kernel/src/FS/NeFS.cc | 1065 |
1 files changed, 1065 insertions, 0 deletions
diff --git a/dev/kernel/src/FS/NeFS.cc b/dev/kernel/src/FS/NeFS.cc new file mode 100644 index 00000000..30d4fb85 --- /dev/null +++ b/dev/kernel/src/FS/NeFS.cc @@ -0,0 +1,1065 @@ +/* ------------------------------------------- + + Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved. + +------------------------------------------- */ + +#ifdef __FSKIT_INCLUDES_NEFS__ + +#include <FSKit/NeFS.h> +#include <FirmwareKit/EPM.h> + +#include <modules/AHCI/AHCI.h> +#include <modules/ATA/ATA.h> +#include <modules/MFlash/MFlash.h> +#include <KernelKit/LPC.h> +#include <NewKit/Crc32.h> +#include <NewKit/KernelPanic.h> +#include <NewKit/KString.h> +#include <NewKit/Utils.h> +#include <KernelKit/UserProcessScheduler.h> +#include <KernelKit/User.h> +#include <KernelKit/DriveMgr.h> + +using namespace NeOS; + +#ifdef __NE_NO_BUILTIN__ +/***********************************************************************************/ +/** + Define those external symbols, to make the editor shutup +*/ +/***********************************************************************************/ + +/***********************************************************************************/ +/// @brief get sector count. +/***********************************************************************************/ +NeOS::SizeT drv_get_sector_count(); + +/***********************************************************************************/ +/// @brief get device size. +/***********************************************************************************/ +NeOS::SizeT drv_get_size(); + +#endif + +///! BUGS: 0 + +/***********************************************************************************/ +/// This file implements the New extended File System. +/// New extended File System implements a B-Tree based algortihm. +/// / +/// /Path1/ /ath2/ +/// /readme.rtf /ListContents.pef /readme.lnk <-- symlink. +/// /Path1/readme.rtf +/***********************************************************************************/ + +STATIC MountpointInterface kMountpoint; + +/***********************************************************************************/ +/// @brief Creates a new fork inside the New filesystem partition. +/// @param catalog it's catalog +/// @param the_fork the fork itself. +/// @return the fork +/***********************************************************************************/ +_Output BOOL NeFileSystemParser::CreateFork(_Input NEFS_FORK_STRUCT& the_fork) +{ + if (the_fork.ForkName[0] != 0 && + the_fork.CatalogName[0] != 0 && + the_fork.DataSize > 0) + { + auto catalog = this->GetCatalog(the_fork.CatalogName); + + if (!catalog) + return NO; + + Lba lba = catalog->DataFork; + + kout << "Fork LBA: " << hex_number(lba) << kendl; + + if (lba < kNeFSCatalogStartAddress) + return NO; + + auto& drv = kMountpoint.A(); + + Lba lba_prev = lba; + + NEFS_FORK_STRUCT prev_fork; + NEFS_FORK_STRUCT cur_fork; + + /// do not check for anything. Loop until we get what we want, that is a free fork zone. + while (drv.fPacket.fPacketGood) + { + drv.fPacket.fPacketLba = lba; + drv.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drv.fPacket.fPacketContent = &cur_fork; + + drv.fInput(drv.fPacket); + + kout << "Next fork: " << hex_number(cur_fork.NextSibling) << kendl; + + if (cur_fork.Flags & kNeFSFlagCreated) + { + kout << "Error: Fork does exists.\r"; + + /// sanity check. + if (KStringBuilder::Equals(cur_fork.ForkName, the_fork.ForkName) && + KStringBuilder::Equals(cur_fork.CatalogName, the_fork.CatalogName)) + break; + + lba_prev = lba; + lba = cur_fork.NextSibling; + + prev_fork = cur_fork; + } + else + { + /// This is a check that we have, in order to link the previous fork + /// entry. + if (lba >= kNeFSCatalogStartAddress) + { + drv.fPacket.fPacketLba = lba_prev; + drv.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drv.fPacket.fPacketContent = &prev_fork; + + prev_fork.NextSibling = lba; + + /// write to disk. + drv.fOutput(drv.fPacket); + } + + break; + } + } + + the_fork.Flags |= kNeFSFlagCreated; + the_fork.DataOffset = lba - sizeof(NEFS_FORK_STRUCT); + the_fork.PreviousSibling = lba_prev; + the_fork.NextSibling = the_fork.DataOffset - the_fork.DataSize; + + drv.fPacket.fPacketLba = lba; + drv.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drv.fPacket.fPacketContent = &the_fork; + + kout << "Allocating fork block...\r"; + + // drv.fOutput(drv.fPacket); + + fs_ifs_write(&kMountpoint, drv, MountpointInterface::kDriveIndexA); + + /// log what we have now. + kout << "Fork offset is at: " << hex_number(the_fork.DataOffset) + << kendl; + + kout << "Wrote fork metadata at: " << hex_number(lba) << kendl; + + return YES; + } + + return NO; +} + +/***********************************************************************************/ +/// @brief Find fork inside filesystem. +/// @param catalog the catalog. +/// @param name the fork name. +/// @return the newly found fork. +/***********************************************************************************/ +_Output NEFS_FORK_STRUCT* NeFileSystemParser::FindFork(_Input NEFS_CATALOG_STRUCT* catalog, + _Input const Char* name, + _Input Boolean is_data) +{ + auto& drive = kMountpoint.A(); + NEFS_FORK_STRUCT* the_fork = nullptr; + + Lba lba = is_data ? catalog->DataFork : catalog->ResourceFork; + + while (lba != 0) + { + drive.fPacket.fPacketLba = lba; + drive.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drive.fPacket.fPacketContent = (VoidPtr)the_fork; + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, 16); + + if (auto res = + fs_ifs_read(&kMountpoint, drive, this->mDriveIndex); + res) + { + switch (res) + { + case 1: + err_global_get() = kErrorDiskReadOnly; + break; + case 2: + err_global_get() = kErrorDiskIsFull; + break; + case 3: + err_global_get() = kErrorNoSuchDisk; + break; + + default: + break; + } + return nullptr; + } + + if (KStringBuilder::Equals(the_fork->ForkName, name)) + { + break; + } + + lba = the_fork->NextSibling; + } + + return the_fork; +} + +/***********************************************************************************/ +/// @brief Simpler factory to create a catalog (assumes you want to create a +/// file.) +/// @param name +/// @return catalog pointer. +/***********************************************************************************/ +_Output NEFS_CATALOG_STRUCT* NeFileSystemParser::CreateCatalog(_Input const Char* name) +{ + return this->CreateCatalog(name, 0, kNeFSCatalogKindFile); +} + +/***********************************************************************************/ +/// @brief Creates a new catalog into the disk. +/// @param name the catalog name. +/// @param flags the flags of the catalog. +/// @param kind the catalog kind. +/// @return catalog pointer. +/***********************************************************************************/ +_Output NEFS_CATALOG_STRUCT* NeFileSystemParser::CreateCatalog(_Input const Char* name, + _Input const Int32& flags, + _Input const Int32& kind) +{ + kout << "CreateCatalog(*...*)\r"; + + Lba out_lba = 0UL; + + kout << "Checking for path separator...\r"; + + /// a directory should have a slash in the end. + if (kind == kNeFSCatalogKindDir && + name[rt_string_len(name) - 1] != NeFileSystemHelper::Separator()) + return nullptr; + + /// a file shouldn't have a slash in the end. + if (kind != kNeFSCatalogKindDir && + name[rt_string_len(name) - 1] == NeFileSystemHelper::Separator()) + return nullptr; + + NEFS_CATALOG_STRUCT* catalog_copy = this->FindCatalog(name, out_lba); + + if (catalog_copy) + { + kout << "Catalog already exists: " << name << ".\r"; + err_global_get() = kErrorFileExists; + + delete catalog_copy; + catalog_copy = nullptr; + + return nullptr; + } + + Char parent_name[kNeFSCatalogNameLen] = {0}; + + for (SizeT indexName = 0UL; indexName < rt_string_len(name); ++indexName) + { + parent_name[indexName] = name[indexName]; + } + + if (*parent_name == 0) + { + kout << "Parent name is NUL.\r"; + err_global_get() = kErrorFileNotFound; + return nullptr; + } + + /// Locate parent catalog, to then allocate right after it. + + for (SizeT index_fill = 0; index_fill < rt_string_len(name); ++index_fill) + { + parent_name[index_fill] = name[index_fill]; + } + + SizeT index_reverse_copy = rt_string_len(parent_name); + + // zero character it. + parent_name[--index_reverse_copy] = 0; + + // mandatory / character, zero it. + parent_name[--index_reverse_copy] = 0; + + while (parent_name[index_reverse_copy] != NeFileSystemHelper::Separator()) + { + parent_name[index_reverse_copy] = 0; + --index_reverse_copy; + } + + NEFS_CATALOG_STRUCT* catalog = this->FindCatalog(parent_name, out_lba); + + auto& drive = kMountpoint.A(); + + constexpr auto kNeFSCatalogPadding = 4; + + if (catalog && catalog->Kind == kNeFSCatalogKindFile) + { + kout << "Parent is a file.\r"; + delete catalog; + + return nullptr; + } + else if (!catalog) + { + Char part_block[sizeof(NEFS_ROOT_PARTITION_BLOCK)] = {0}; + + drive.fPacket.fPacketContent = part_block; + drive.fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive.fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + + drive.fInput(drive.fPacket); + + NEFS_ROOT_PARTITION_BLOCK* blk_nefs = (NEFS_ROOT_PARTITION_BLOCK*)part_block; + out_lba = blk_nefs->StartCatalog; + } + + if (drive.fPacket.fPacketReadOnly) + return nullptr; + + NEFS_CATALOG_STRUCT* child_catalog = new NEFS_CATALOG_STRUCT(); + + child_catalog->Checksum = 0; + child_catalog->ResourceForkSize = 0UL; + child_catalog->DataForkSize = 0UL; + child_catalog->CatalogFlags = kNeFSStatusUnlocked; + child_catalog->NextSibling = out_lba; + child_catalog->PrevSibling = out_lba; + child_catalog->Kind = kind; + child_catalog->Flags |= kNeFSFlagCreated; + child_catalog->CatalogFlags = flags; + + SizeT i = rt_string_len(name); + + // get rid pf \0 + --i; + + if (kind == kNeFSCatalogKindDir) + --i; + + while (name[i] != '/') + --i; + + rt_copy_memory((VoidPtr)(name + i), (VoidPtr)child_catalog->Name, + rt_string_len(name)); + + NEFS_CATALOG_STRUCT temporary_catalog{}; + + Lba start_free = out_lba; + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + Char buf_part_block[sizeof(NEFS_ROOT_PARTITION_BLOCK)] = {0}; + + drive.fPacket.fPacketContent = buf_part_block; + drive.fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive.fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + + drive.fInput(drive.fPacket); + + NEFS_ROOT_PARTITION_BLOCK* part_block = (NEFS_ROOT_PARTITION_BLOCK*)buf_part_block; + + drive.fPacket.fPacketContent = &temporary_catalog; + drive.fPacket.fPacketSize = sizeof(NEFS_CATALOG_STRUCT); + drive.fPacket.fPacketLba = start_free; + + drive.fInput(drive.fPacket); + + if (part_block->FreeCatalog < 1) + { + delete child_catalog; + child_catalog = nullptr; + + return nullptr; + } + + kout << "Start finding catalog to allocate or empty space...\r"; + + while (start_free >= part_block->StartCatalog) + { + // ========================== // + // Allocate catalog now... + // ========================== // + if ((temporary_catalog.Flags & kNeFSFlagCreated) == 0) + { + child_catalog->NextSibling = + start_free + (sizeof(NEFS_CATALOG_STRUCT) * kNeFSCatalogPadding); + + drive.fPacket.fPacketContent = &temporary_catalog; + drive.fPacket.fPacketSize = sizeof(NEFS_CATALOG_STRUCT); + drive.fPacket.fPacketLba = start_free; + + drive.fOutput(drive.fPacket); + + child_catalog->DataFork = part_block->DiskSize - start_free; + child_catalog->ResourceFork = child_catalog->DataFork; + + drive.fPacket.fPacketContent = child_catalog; + drive.fPacket.fPacketSize = sizeof(NEFS_CATALOG_STRUCT); + drive.fPacket.fPacketLba = start_free; + + drive.fOutput(drive.fPacket); + + // Get NeFS partition's block. + + drive.fPacket.fPacketContent = buf_part_block; + drive.fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive.fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + + drive.fInput(drive.fPacket); + + part_block->FreeSectors -= 1; + part_block->CatalogCount += 1; + part_block->FreeCatalog -= 1; + + drive.fOutput(drive.fPacket); + + kout << "Create new catalog with flags: " + << hex_number(child_catalog->Flags) << kendl; + kout << "Create new catalog with name: " << child_catalog->Name + << kendl; + + delete catalog; + catalog = nullptr; + + NEFS_CATALOG_STRUCT* found_catalog = new NEFS_CATALOG_STRUCT(); + rt_copy_memory(&temporary_catalog, found_catalog, sizeof(NEFS_CATALOG_STRUCT)); + + return found_catalog; + } + else if ((temporary_catalog.Flags & kNeFSFlagCreated) && + KStringBuilder::Equals(temporary_catalog.Name, name)) + { + rt_copy_memory(&temporary_catalog, child_catalog, sizeof(NEFS_CATALOG_STRUCT)); + + return child_catalog; + } + + start_free = start_free + (sizeof(NEFS_CATALOG_STRUCT) * kNeFSCatalogPadding); + + drive.fPacket.fPacketContent = &temporary_catalog; + drive.fPacket.fPacketSize = sizeof(NEFS_CATALOG_STRUCT); + drive.fPacket.fPacketLba = start_free; + + drive.fInput(drive.fPacket); + } + + delete catalog; + return nullptr; +} + +/// @brief Make a EPM+NeFS drive out of the disk. +/// @param drive The drive to write on. +/// @return If it was sucessful, see err_global_get(). +bool NeFileSystemParser::Format(_Input _Output DriveTrait* drive, _Input const Lba endLba, _Input const Int32 flags, const Char* part_name) +{ + if (*part_name == 0 || + endLba == 0) + return false; + + // verify disk. + drive->fVerify(drive->fPacket); + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive->fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + // if disk isn't good, then error out. + if (false == drive->fPacket.fPacketGood) + { + err_global_get() = kErrorDiskIsCorrupted; + return false; + } + + Char fs_buf[sizeof(NEFS_ROOT_PARTITION_BLOCK)] = {0}; + + Lba start = kNeFSRootCatalogStartAddress; + + drive->fPacket.fPacketContent = fs_buf; + drive->fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive->fPacket.fPacketLba = start; + + drive->fInput(drive->fPacket); + + if (flags & kNeFSPartitionTypeBoot) + { + // make it bootable when needed. + Char buf_epm[kNeFSSectorSz] = {0}; + + EPM_PART_BLOCK* epm_boot = (EPM_PART_BLOCK*)buf_epm; + + // Write a new EPM entry. + + constexpr auto kFsName = "NeFS"; + constexpr auto kBlockName = "ZkaOS:"; + + rt_copy_memory(reinterpret_cast<VoidPtr>(const_cast<Char*>(kFsName)), epm_boot->Fs, rt_string_len(kFsName)); + + epm_boot->FsVersion = kNeFSVersionInteger; + epm_boot->LbaStart = start; + epm_boot->SectorSz = kNeFSSectorSz; + + rt_copy_memory(reinterpret_cast<VoidPtr>(const_cast<Char*>(kBlockName)), epm_boot->Name, rt_string_len(kBlockName)); + rt_copy_memory(reinterpret_cast<VoidPtr>(const_cast<Char*>(kEPMMagic)), epm_boot->Magic, rt_string_len(kEPMMagic)); + + Lba outEpmLba = kEPMBootBlockLba; + + Char buf[kNeFSSectorSz]; + + Lba prevStart = 0; + SizeT cnt = 0; + + while (drive->fPacket.fPacketGood) + { + drive->fPacket.fPacketContent = buf; + drive->fPacket.fPacketSize = sizeof(EPM_PART_BLOCK); + drive->fPacket.fPacketLba = outEpmLba; + + drive->fInput(drive->fPacket); + + if (buf[0] == 0) + { + epm_boot->LbaStart = prevStart; + + if (epm_boot->LbaStart) + epm_boot->LbaStart = outEpmLba; + + epm_boot->LbaEnd = endLba; + epm_boot->NumBlocks = cnt; + + drive->fPacket.fPacketContent = buf_epm; + drive->fPacket.fPacketSize = sizeof(EPM_PART_BLOCK); + drive->fPacket.fPacketLba = outEpmLba; + + drive->fOutput(drive->fPacket); + + break; + } + else + { + prevStart = ((EPM_PART_BLOCK*)buf)->LbaStart + ((EPM_PART_BLOCK*)buf)->LbaEnd; + } + + outEpmLba += sizeof(EPM_PART_BLOCK); + ++cnt; + } + } + + // disk isnt faulty and data has been fetched. + while (drive->fPacket.fPacketGood) + { + NEFS_ROOT_PARTITION_BLOCK* part_block = (NEFS_ROOT_PARTITION_BLOCK*)fs_buf; + + // check for an empty partition here. + if (part_block->PartitionName[0] == 0 && + rt_string_cmp(part_block->Ident, kNeFSIdent, kNeFSIdentLen)) + { + // partition is free and valid. + + part_block->Version = kNeFSVersionInteger; + + const auto kNeFSUntitledHD = part_name; + + rt_copy_memory((VoidPtr)kNeFSIdent, (VoidPtr)part_block->Ident, + kNeFSIdentLen); + + rt_copy_memory((VoidPtr)kNeFSUntitledHD, (VoidPtr)part_block->PartitionName, + rt_string_len(kNeFSUntitledHD)); + + SizeT catalogCount = 0UL; + + SizeT sectorCount = drv_get_sector_count(); + SizeT diskSize = drv_get_size(); + + part_block->Kind = kNeFSPartitionTypeStandard; + part_block->StartCatalog = kNeFSCatalogStartAddress; + part_block->Flags = kNeFSPartitionTypeStandard; + part_block->CatalogCount = sectorCount / sizeof(NEFS_CATALOG_STRUCT); + part_block->FreeSectors = sectorCount / sizeof(NEFS_CATALOG_STRUCT); + part_block->SectorCount = sectorCount; + part_block->DiskSize = diskSize; + part_block->FreeCatalog = sectorCount / sizeof(NEFS_CATALOG_STRUCT); + + drive->fPacket.fPacketContent = fs_buf; + drive->fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive->fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + + drive->fOutput(drive->fPacket); + + kout << "drive kind: " << drive->fDriveKind() << kendl; + + kout << "partition name: " << part_block->PartitionName << kendl; + kout << "start: " << hex_number(part_block->StartCatalog) << kendl; + kout << "number of catalogs: " << hex_number(part_block->CatalogCount) << kendl; + kout << "free catalog: " << hex_number(part_block->FreeCatalog) << kendl; + kout << "free sectors: " << hex_number(part_block->FreeSectors) << kendl; + kout << "sector size: " << hex_number(part_block->SectorSize) << kendl; + + // write the root catalog. + this->CreateCatalog(kNeFSRoot, 0, kNeFSCatalogKindDir); + + return true; + } + + kout << "partition block already exists.\r"; + + start += part_block->DiskSize; + + drive->fPacket.fPacketContent = fs_buf; + drive->fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive->fPacket.fPacketLba = start; + + drive->fInput(drive->fPacket); + } + + return false; +} + +/// @brief Writes the data fork into a specific catalog. +/// @param catalog the catalog itself +/// @param data the data. +/// @return if the catalog w rote the contents successfully. +bool NeFileSystemParser::WriteCatalog(_Input const Char* catalog_name, Bool is_rsrc_fork, _Input VoidPtr data, _Input SizeT size_of_data, _Input const Char* fork_name) +{ + if (size_of_data < 1) + return No; + + auto buf = new UInt8[size_of_data]; + rt_set_memory(buf, 0, size_of_data); + + rt_copy_memory(data, buf, size_of_data); + + auto& drive = kMountpoint.A(); + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + auto catalog = this->GetCatalog(catalog_name); + + if (!catalog) + { + delete[] buf; + buf = nullptr; + return NO; + } + + auto startFork = (!is_rsrc_fork) ? catalog->DataFork + : catalog->ResourceFork; + + delete catalog; + catalog = nullptr; + + NEFS_FORK_STRUCT* fork_data_input = new NEFS_FORK_STRUCT(); + NEFS_FORK_STRUCT prev_fork{}; + + kout << hex_number(startFork) << kendl; + + // sanity check of the fork position as the condition to run the loop. + while (startFork >= kNeFSCatalogStartAddress) + { + drive.fPacket.fPacketContent = fork_data_input; + drive.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drive.fPacket.fPacketLba = startFork; + + drive.fInput(drive.fPacket); + + kout << hex_number(fork_data_input->DataSize) << kendl; + kout << hex_number(size_of_data) << kendl; + kout << hex_number(fork_data_input->Flags) << kendl; + kout << fork_name << kendl; + kout << fork_data_input->ForkName << kendl; + kout << fork_data_input->CatalogName << kendl; + kout << catalog_name << kendl; + + if ((fork_data_input->Flags & kNeFSFlagCreated) && + KStringBuilder::Equals(fork_data_input->ForkName, fork_name) && + KStringBuilder::Equals(fork_data_input->CatalogName, catalog_name) && + fork_data_input->DataSize == size_of_data) + { + // ===================================================== // + // Store the blob now. + // ===================================================== // + + drive.fPacket.fPacketContent = buf; + drive.fPacket.fPacketSize = size_of_data; + drive.fPacket.fPacketLba = fork_data_input->DataOffset; + + kout << "data offset: " << hex_number(fork_data_input->DataOffset) << kendl; + + drive.fOutput(drive.fPacket); + + kout << "wrote data at offset: " << hex_number(fork_data_input->DataOffset) << kendl; + + delete fork_data_input; + delete[] buf; + + return true; + } + + // stumble upon a fork, store it. + + prev_fork = *fork_data_input; + + startFork = fork_data_input->NextSibling; + } + + delete[] buf; + delete fork_data_input; + + return false; +} + +/// @brief +/// @param catalog_name the catalog name. +/// @return the newly found catalog. +_Output NEFS_CATALOG_STRUCT* NeFileSystemParser::FindCatalog(_Input const Char* catalog_name, + Lba& out_lba, + Bool search_hidden, + Bool local_search) +{ + if (!catalog_name || + *catalog_name == 0) + return nullptr; + + NEFS_ROOT_PARTITION_BLOCK part{0}; + auto& drive = kMountpoint.A(); + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + drive.fPacket.fPacketContent = ∂ + drive.fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + drive.fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + + drive.fInput(drive.fPacket); + + auto start_catalog_lba = kNeFSCatalogStartAddress; + const auto kStartCatalogList = start_catalog_lba; + + if (!KStringBuilder::Equals(catalog_name, NeFileSystemHelper::Root()) && local_search) + { + Char parent_name[kNeFSCatalogNameLen] = {0}; + + for (SizeT indexFill = 0; indexFill < rt_string_len(catalog_name); ++indexFill) + { + parent_name[indexFill] = catalog_name[indexFill]; + } + + SizeT indexReverseCopy = rt_string_len(parent_name); + + // zero character. + parent_name[--indexReverseCopy] = 0; + + // mandatory '/' character. + parent_name[--indexReverseCopy] = 0; + + while (parent_name[indexReverseCopy] != NeFileSystemHelper::Separator()) + { + parent_name[indexReverseCopy] = 0; + --indexReverseCopy; + } + + NEFS_CATALOG_STRUCT* parent_catalog = this->FindCatalog(parent_name, out_lba); + + if (parent_catalog && + !KStringBuilder::Equals(parent_name, NeFileSystemHelper::Root())) + { + start_catalog_lba = parent_catalog->NextSibling; + + delete parent_catalog; + parent_catalog = nullptr; + + local_search = YES; + } + else if (parent_catalog) + { + start_catalog_lba = parent_catalog->NextSibling; + + local_search = YES; + + delete parent_catalog; + parent_catalog = nullptr; + } + else if (!parent_catalog) + { + return nullptr; + } + } + + NEFS_CATALOG_STRUCT temporary_catalog{}; + + SizeT i = rt_string_len(catalog_name); + + // get rid of \0 + --i; + + if (catalog_name[i] == '/') + --i; + + while (catalog_name[i] != '/') + --i; + + const Char* tmp_name = (catalog_name + i); + +kNeFSSearchThroughCatalogList: + while (drive.fPacket.fPacketGood) + { + drive.fPacket.fPacketLba = start_catalog_lba; + drive.fPacket.fPacketContent = &temporary_catalog; + drive.fPacket.fPacketSize = sizeof(NEFS_CATALOG_STRUCT); + + drive.fInput(drive.fPacket); + + if (KStringBuilder::Equals(tmp_name, temporary_catalog.Name)) + { + if (temporary_catalog.Status == kNeFSStatusLocked && + !search_hidden) + { + err_global_get() = kErrorFileLocked; + + goto NeFSContinueSearch; + } + + /// ignore unallocated catalog, break + if (!(temporary_catalog.Flags & kNeFSFlagCreated)) + { + err_global_get() = kErrorFileNotFound; + + goto NeFSContinueSearch; + } + + kout << "Found available catalog at: " << hex_number(start_catalog_lba) << kendl; + kout << "Found available catalog at: " << temporary_catalog.Name << kendl; + + NEFS_CATALOG_STRUCT* catalog_ptr = new NEFS_CATALOG_STRUCT(); + rt_copy_memory(&temporary_catalog, catalog_ptr, sizeof(NEFS_CATALOG_STRUCT)); + + out_lba = start_catalog_lba; + return catalog_ptr; + } + + NeFSContinueSearch: + start_catalog_lba = temporary_catalog.NextSibling; + + if (start_catalog_lba < part.StartCatalog) + break; + } + + if (local_search) + { + local_search = false; + start_catalog_lba = part.StartCatalog; + + goto kNeFSSearchThroughCatalogList; + } + + err_global_get() = kErrorFileNotFound; + + out_lba = 0UL; + + return nullptr; +} + +/// @brief Get catalog from filesystem. +/// @param name the catalog's name/ +/// @return +_Output NEFS_CATALOG_STRUCT* NeFileSystemParser::GetCatalog(_Input const Char* name) +{ + Lba unused = 0; + return this->FindCatalog(name, unused, YES); +} + +/// @brief Closes a catalog, (frees it). +/// @param catalog the catalog to close. +/// @return +_Output Boolean NeFileSystemParser::CloseCatalog(_Input _Output NEFS_CATALOG_STRUCT* catalog) +{ + if (!catalog) + return false; + + delete catalog; + catalog = nullptr; + + return true; +} + +/// @brief Mark catalog as removed. +/// @param catalog The catalog structure. +/// @return if the catalog was removed or not. +_Output Boolean NeFileSystemParser::RemoveCatalog(_Input const Char* catalog_name) +{ + if (!catalog_name || + KStringBuilder::Equals(catalog_name, NeFileSystemHelper::Root())) + { + err_global_get() = kErrorInternal; + return false; + } + + Lba out_lba = 0; + auto catalog = this->FindCatalog(catalog_name, out_lba); + + if (out_lba >= kNeFSCatalogStartAddress || + catalog->Flags & kNeFSFlagCreated) + { + catalog->Flags &= (~kNeFSFlagCreated); + catalog->Flags |= kNeFSFlagDeleted; + + auto& drive = kMountpoint.A(); + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + drive.fPacket.fPacketLba = out_lba; // the catalog position. + drive.fPacket.fPacketSize = + sizeof(NEFS_CATALOG_STRUCT); // size of catalog. roughly the sector size. + drive.fPacket.fPacketContent = catalog; // the catalog itself. + + drive.fOutput(drive.fPacket); // send packet. + + Char partitionBlockBuf[sizeof(NEFS_ROOT_PARTITION_BLOCK)] = {0}; + + drive.fPacket.fPacketLba = kNeFSRootCatalogStartAddress; + drive.fPacket.fPacketContent = partitionBlockBuf; + drive.fPacket.fPacketSize = sizeof(NEFS_ROOT_PARTITION_BLOCK); + + drive.fInput(drive.fPacket); + + NEFS_ROOT_PARTITION_BLOCK* part_block = + reinterpret_cast<NEFS_ROOT_PARTITION_BLOCK*>(partitionBlockBuf); + + --part_block->CatalogCount; + ++part_block->FreeSectors; + + drive.fOutput(drive.fPacket); + + return true; + } + + delete catalog; + catalog = nullptr; + + return false; +} + +/// ***************************************************************** /// +/// Reading,Seek,Tell are unimplemented on catalogs, refer to forks I/O instead. +/// ***************************************************************** /// + +/***********************************************************************************/ +/// @brief Read the catalog data fork. +/// @param catalog +/// @param dataSz +/// @return +/***********************************************************************************/ + +VoidPtr NeFileSystemParser::ReadCatalog(_Input _Output NEFS_CATALOG_STRUCT* catalog, + _Input Bool is_rsrc_fork, + _Input SizeT dataSz, + _Input const Char* forkName) +{ + if (!catalog) + { + err_global_get() = kErrorInvalidData; + return nullptr; + } + + Lba dataForkLba = (!is_rsrc_fork) ? catalog->DataFork : catalog->ResourceFork; + Size dataForkSize = (!is_rsrc_fork) ? catalog->DataForkSize : catalog->ResourceForkSize; + + kout << "catalog " << catalog->Name + << ", fork: " << hex_number(dataForkLba) << kendl; + + NEFS_FORK_STRUCT* fs_buf = new NEFS_FORK_STRUCT(); + auto& drive = kMountpoint.A(); + + rt_copy_memory((VoidPtr) "fs/nefs-packet", drive.fPacket.fPacketMime, + rt_string_len("fs/nefs-packet")); + + NEFS_FORK_STRUCT* fs_fork_data = nullptr; + + while (dataForkLba > kNeFSCatalogStartAddress) + { + drive.fPacket.fPacketLba = dataForkLba; + drive.fPacket.fPacketSize = sizeof(NEFS_FORK_STRUCT); + drive.fPacket.fPacketContent = fs_buf; + + drive.fInput(drive.fPacket); + + fs_fork_data = fs_buf; + + kout << "ForkName: " << fs_fork_data->ForkName << kendl; + kout << "CatalogName: " << fs_fork_data->CatalogName << kendl; + + if (KStringBuilder::Equals(forkName, fs_fork_data->ForkName) && + KStringBuilder::Equals(catalog->Name, fs_fork_data->CatalogName)) + break; + + dataForkLba = fs_fork_data->NextSibling; + } + + if (dataForkLba < kNeFSCatalogStartAddress) + { + delete fs_buf; + return nullptr; + } + + return fs_fork_data; +} + +/***********************************************************************************/ +/// @brief Seek in the data fork. +/// @param catalog the catalog offset. +/// @param off where to seek. +/// @return if the seeking was successful. +/***********************************************************************************/ + +bool NeFileSystemParser::Seek(_Input _Output NEFS_CATALOG_STRUCT* catalog, SizeT off) +{ + err_global_get() = kErrorUnimplemented; + return false; +} + +/***********************************************************************************/ +/// @brief Tell where we are inside the data fork. +/// @param catalog +/// @return The position on the file. +/***********************************************************************************/ + +SizeT NeFileSystemParser::Tell(_Input _Output NEFS_CATALOG_STRUCT* catalog) +{ + err_global_get() = kErrorUnimplemented; + return 0; +} + +namespace NeOS::NeFS +{ + /***********************************************************************************/ + /// @brief Construct NeFS drives. + /***********************************************************************************/ + Boolean fs_init_nefs(Void) noexcept + { + kout << "Creating main disk...\r"; + + kMountpoint.A() = io_construct_main_drive(); + + if (kMountpoint.A().fPacket.fPacketReadOnly == YES) + ke_panic(RUNTIME_CHECK_FILESYSTEM, "Main filesystem cannot be mounted."); + + return YES; + } +} // namespace NeOS::NeFS + +#endif // ifdef __FSKIT_INCLUDES_NEFS__ |