isolate POSIX builds from the host UCRT, wire lwext4 and ntfs-3g as ext4.sys and ntfs.sys, split the FAT driver into directory/file/async/driver/mount units, add posixsrv and dwm plus input/console/desktop syscall clients and a pile of new smoke targets, rename serial.sys to cereal.sys, name HDA/USB/lwIP/AHCI workers, harden ATA probing/reset/removal around actual hardware deadlines, absent-channel detection, diagnostics and explicit worker lifetime, redo ACPI S5 shutdown around GAS/MMIO and HW-reduced firmware, scan SSDTs for _S5 and deal with Intel SMI sleep trapping, make serial and SMP timeouts use real monotonic deadlines, add thread names and fix terminal thread teardown, scheduler and APC prepare/commit races, make advisory file locks queryable and preserve split ranges and add mutable file append state, add shared-memory pipes with kernel-assisted wait/wake, introduce capability-scoped input and display managers, split surface map rights into read/write, add explicit unmap and replace present with commit/generation/damage tracking while keeping physical presentation under the display manager, decouple native exception classes from Win32 exception numbers and translate them in kernel32, add opaque process startup data, bump the resource protocol to v3 with namespace directories, symlinks and enumeration and service control to v2 with generic READY handle exports, add the new POSIX errno/status surface and rebuild fds around posixsrv-owned shared open descriptions, descriptor-local flags, exact inheritance snapshots, dup/fcntl/record locks and shared-ring pipes, add waitpid, POSIX credentials/groups/sessions/passwd/group lookups and move sockets onto stable open descriptions, port the shells and apps to the new console/input services and surface commit API, teach init to load services.ini and start/supervise RSSRV, DWM and generic services under restricted capabilities while publishing their endpoints through RSSRV, split RSSRV into namespace, volume, display, session, input, console and resource components and make /SystemRoot a real symlink to the independently published system volume, shift the syscall table again, expand lock/resource/surface/POSIX/service/thread smoke coverage, make docs scream ASK QUESTIONS and DISCUSS at LLMs, replace MIT No Attribution with WTFPL+.
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@@ -0,0 +1,152 @@
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// FAT private implementation model shared by the driver's translation units.
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#pragma once
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#include "fat.h"
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#include "fat_disk.h"
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#define FAT_PATH_CACHE_SLOTS 64u
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#define FAT_PATH_CACHE_MAX 512u
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#define FAT_CHAIN_CACHE_SLOTS 16u
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#define FAT_WRITE_RUN_MAX_SECTORS 128u
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#define FAT_READ_RUN_MAX_SECTORS 512u
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#define FAT_MAX_LFN 256
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#ifndef FAT_DEBUG
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#define FAT_DEBUG 0
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#endif
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#define FatDebugPrint(...) do { if (FAT_DEBUG) DbgPrint(__VA_ARGS__); } while (0)
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typedef struct FAT_PATH_CACHE_ENTRY {
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bool Valid;
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uint64_t Generation;
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uint32_t Hash;
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size_t PathLength;
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char Path[FAT_PATH_CACHE_MAX];
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uint32_t Cluster;
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uint32_t Size;
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uint8_t Attr;
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uint64_t DirentLba;
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uint32_t DirentOffset;
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} FAT_PATH_CACHE_ENTRY;
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typedef struct FAT_CHAIN_CACHE_ENTRY {
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bool Valid;
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uint32_t LogicalStart;
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uint32_t PhysicalStart;
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uint32_t Length;
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uint32_t NextCluster;
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} FAT_CHAIN_CACHE_ENTRY;
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struct FAT_VOL_S {
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FAT_VARIANT Variant;
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uint8_t DriveIndex;
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uint64_t PartitionLba;
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uint64_t PartitionSize;
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uint32_t BytesPerSector;
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uint32_t SectorsPerCluster;
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uint32_t BytesPerCluster;
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uint32_t ReservedSectors;
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uint32_t NumFats;
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uint32_t FatSize;
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uint32_t RootCluster;
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uint32_t RootEntryCount;
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uint32_t RootDirSectors;
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uint64_t RootDirStart;
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uint64_t DataStart;
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uint32_t TotalClusters;
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uint32_t NextFreeHint;
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SPINLOCK PathCacheLock;
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uint64_t PathCacheGeneration;
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IO_FILESYSTEM_STATS Stats;
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FAT_PATH_CACHE_ENTRY PathCache[FAT_PATH_CACHE_SLOTS];
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IO_VOLUME* Volume;
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LIST_ENTRY MountLink;
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};
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typedef struct FAT_FILE {
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uint32_t StartCluster;
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uint32_t FileSize;
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FAT_VOL* Vol;
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uint64_t DirentLba;
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uint32_t DirentOffset;
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SPINLOCK ChainCacheLock;
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uint32_t ChainCacheClock;
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FAT_CHAIN_CACHE_ENTRY ChainCache[FAT_CHAIN_CACHE_SLOTS];
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} FAT_FILE;
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typedef struct FAT_ENCODED_TIME {
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uint16_t Date;
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uint16_t Time;
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uint8_t CreateTimeTenth;
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} FAT_ENCODED_TIME;
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typedef struct FAT_DIRENT_UPDATE {
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uint32_t Flags;
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uint32_t Size;
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uint32_t FirstCluster;
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FAT_ENCODED_TIME Timestamp;
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} FAT_DIRENT_UPDATE;
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#define FAT_DIRENT_UPDATE_SIZE 0x00000001u
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#define FAT_DIRENT_UPDATE_FIRST_CLUSTER 0x00000002u
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#define FAT_DIRENT_UPDATE_CREATE_TIME 0x00000004u
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#define FAT_DIRENT_UPDATE_WRITE_TIME 0x00000008u
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#define FAT_DIRENT_UPDATE_ACCESS_DATE 0x00000010u
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KSTATUS FatReadSectors(FAT_VOL* volume, uint64_t lba, uint32_t count, void* buffer);
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KSTATUS FatWriteSectors(FAT_VOL* volume, uint64_t lba, uint32_t count, const void* buffer);
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const char* FatVariantName(FAT_VARIANT variant);
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uint32_t FatEocMark(FAT_VOL* volume);
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int FatIsDataCluster(FAT_VOL* volume, uint32_t cluster);
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uint32_t FatDirentFirstCluster(FAT_VOL* volume, const DIRENT* dirent);
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void FatSetDirentFirstCluster(FAT_VOL* volume, DIRENT* dirent, uint32_t cluster);
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int FatIsFixedRoot(FAT_VOL* volume, uint32_t dirCluster);
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int FatDirectoryFirstSegment(FAT_VOL* volume, uint32_t dirCluster,
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uint32_t* cursorOut, uint64_t* lbaOut, uint32_t* sectorsOut);
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int FatDirectoryNextSegment(FAT_VOL* volume, uint32_t dirCluster,
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uint32_t* cursorInOut, uint64_t* lbaOut, uint32_t* sectorsOut);
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uint64_t FatClusterToLba(FAT_VOL* volume, uint32_t cluster);
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uint32_t FatEntry(FAT_VOL* volume, uint32_t cluster);
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KSTATUS FatWriteEntry(FAT_VOL* volume, uint32_t cluster, uint32_t value);
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void FatFlushCache(FAT_VOL* volume);
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uint32_t FatAllocClusterEx(FAT_VOL* volume, int zeroCluster);
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uint32_t FatAllocCluster(FAT_VOL* volume);
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uint32_t FatAppendClusterEx(FAT_VOL* volume, uint32_t lastCluster, int zeroCluster);
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uint32_t FatAppendCluster(FAT_VOL* volume, uint32_t lastCluster);
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uint32_t FatGetChainEnd(FAT_VOL* volume, uint32_t start, uint32_t* countOut);
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void FatFreeClusterChain(FAT_VOL* volume, uint32_t start);
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void FatQueryEncodedTime(FAT_ENCODED_TIME* out);
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void FatDecodeDateTime(uint16_t date, uint16_t time, uint8_t createTenth, SYS_SYSTEM_TIME* out);
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void FatDecodeAccessDate(uint16_t date, SYS_SYSTEM_TIME* out);
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KSTATUS FatDirentUpdateMetadata(FAT_VOL* volume, uint64_t lba, uint32_t offset,
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const FAT_DIRENT_UPDATE* update);
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KSTATUS FatDirentUpdateSize(FAT_VOL* volume, uint64_t lba, uint32_t offset, uint32_t size);
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KSTATUS FatDirentUpdateFirstCluster(FAT_VOL* volume, uint64_t lba, uint32_t offset, uint32_t cluster);
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void FatLfnAppend(char* lfn, const LFN_ENTRY* entry);
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void FatPathCacheInvalidate(FAT_VOL* volume);
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void FatStatsAddReadRun(FAT_VOL* volume, uint32_t sectors, uint32_t merges);
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void FatFileInitChainCache(FAT_FILE* file);
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void FatFileInvalidateChainCache(FAT_FILE* file);
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uint32_t FatResolveFileCluster(FAT_FILE* file, uint32_t logicalIndex);
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bool FatBuildReadRun(FAT_FILE* file, uint32_t logicalIndex,
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uint32_t startCluster, uint32_t maxSectors,
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uint32_t* runSectorsOut, uint32_t* nextClusterOut);
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KSTATUS FatLookupPathV(FAT_VOL* volume, SYS_STRING_VIEW path,
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uint32_t* clusterOut, uint32_t* sizeOut, uint8_t* attrOut,
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uint64_t* direntLbaOut, uint32_t* direntOffsetOut);
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KSTATUS FatTraverseV(FAT_VOL* volume, SYS_STRING_VIEW path,
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uint32_t* clusterOut, uint32_t* sizeOut);
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KSTATUS FatResolveParentForMutation(FAT_VOL* volume, SYS_STRING_VIEW path,
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uint32_t* parentClusterOut, SYS_STRING_VIEW* nameOut);
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KSTATUS FatCreateDirent(FAT_VOL* volume, SYS_STRING_VIEW path,
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uint8_t attr, uint32_t firstCluster, uint32_t size,
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uint64_t* direntLbaOut, uint32_t* direntOffsetOut);
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KSTATUS FatInitializeDirectoryCluster(FAT_VOL* volume, uint32_t dirCluster,
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uint32_t parentCluster);
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KSTATUS FatDirectoryIsEmpty(FAT_VOL* volume, uint32_t dirCluster, int* emptyOut);
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KSTATUS FatDeleteDirentRunV(FAT_VOL* volume, uint32_t parentCluster,
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SYS_STRING_VIEW name);
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void FatCacheInvalidate(void);
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void FatCacheInvalidateVolume(FAT_VOL* volume);
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