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fuse_intf.c
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fuse_intf.c
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/**
* @file dll/fuse/fuse_intf.c
*
* @copyright 2015-2017 Bill Zissimopoulos
*/
/*
* This file is part of WinFsp.
*
* You can redistribute it and/or modify it under the terms of the GNU
* General Public License version 3 as published by the Free Software
* Foundation.
*
* Licensees holding a valid commercial license may use this file in
* accordance with the commercial license agreement provided with the
* software.
*/
#include <dll/fuse/library.h>
static inline
VOID fsp_fuse_op_enter_lock(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
switch (FileSystem->OpGuardStrategy)
{
case FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY_FINE:
if ((FspFsctlTransactCreateKind == Request->Kind &&
FILE_OPEN != ((Request->Req.Create.CreateOptions >> 24) & 0xff)) ||
FspFsctlTransactOverwriteKind == Request->Kind ||
(FspFsctlTransactCleanupKind == Request->Kind &&
Request->Req.Cleanup.Delete) ||
(FspFsctlTransactSetInformationKind == Request->Kind &&
10/*FileRenameInformation*/ == Request->Req.SetInformation.FileInformationClass) ||
FspFsctlTransactSetVolumeInformationKind == Request->Kind ||
(FspFsctlTransactFlushBuffersKind == Request->Kind &&
0 == Request->Req.FlushBuffers.UserContext &&
0 == Request->Req.FlushBuffers.UserContext2) ||
/* FSCTL_SET_REPARSE_POINT manipulates namespace */
(FspFsctlTransactFileSystemControlKind == Request->Kind &&
FSCTL_SET_REPARSE_POINT == Request->Req.FileSystemControl.FsControlCode))
{
AcquireSRWLockExclusive(&FileSystem->OpGuardLock);
}
else
if (FspFsctlTransactCreateKind == Request->Kind ||
(FspFsctlTransactSetInformationKind == Request->Kind &&
13/*FileDispositionInformation*/ == Request->Req.SetInformation.FileInformationClass) ||
FspFsctlTransactQueryDirectoryKind == Request->Kind ||
FspFsctlTransactQueryVolumeInformationKind == Request->Kind ||
/* FSCTL_GET_REPARSE_POINT may access namespace */
(FspFsctlTransactFileSystemControlKind == Request->Kind &&
FSCTL_GET_REPARSE_POINT == Request->Req.FileSystemControl.FsControlCode))
{
AcquireSRWLockShared(&FileSystem->OpGuardLock);
}
break;
case FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY_COARSE:
AcquireSRWLockExclusive(&FileSystem->OpGuardLock);
break;
}
}
static inline
VOID fsp_fuse_op_leave_unlock(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
switch (FileSystem->OpGuardStrategy)
{
case FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY_FINE:
if ((FspFsctlTransactCreateKind == Request->Kind &&
FILE_OPEN != ((Request->Req.Create.CreateOptions >> 24) & 0xff)) ||
FspFsctlTransactOverwriteKind == Request->Kind ||
(FspFsctlTransactCleanupKind == Request->Kind &&
Request->Req.Cleanup.Delete) ||
(FspFsctlTransactSetInformationKind == Request->Kind &&
10/*FileRenameInformation*/ == Request->Req.SetInformation.FileInformationClass) ||
FspFsctlTransactSetVolumeInformationKind == Request->Kind ||
(FspFsctlTransactFlushBuffersKind == Request->Kind &&
0 == Request->Req.FlushBuffers.UserContext &&
0 == Request->Req.FlushBuffers.UserContext2) ||
/* FSCTL_SET_REPARSE_POINT manipulates namespace */
(FspFsctlTransactFileSystemControlKind == Request->Kind &&
FSCTL_SET_REPARSE_POINT == Request->Req.FileSystemControl.FsControlCode))
{
ReleaseSRWLockExclusive(&FileSystem->OpGuardLock);
}
else
if (FspFsctlTransactCreateKind == Request->Kind ||
(FspFsctlTransactSetInformationKind == Request->Kind &&
13/*FileDispositionInformation*/ == Request->Req.SetInformation.FileInformationClass) ||
FspFsctlTransactQueryDirectoryKind == Request->Kind ||
FspFsctlTransactQueryVolumeInformationKind == Request->Kind ||
/* FSCTL_GET_REPARSE_POINT may access namespace */
(FspFsctlTransactFileSystemControlKind == Request->Kind &&
FSCTL_GET_REPARSE_POINT == Request->Req.FileSystemControl.FsControlCode))
{
ReleaseSRWLockShared(&FileSystem->OpGuardLock);
}
break;
case FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY_COARSE:
ReleaseSRWLockExclusive(&FileSystem->OpGuardLock);
break;
}
}
NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
struct fuse *f = FileSystem->UserContext;
struct fuse_context *context;
struct fsp_fuse_context_header *contexthdr;
char *PosixPath = 0;
UINT32 Uid = -1, Gid = -1;
PWSTR FileName = 0, Suffix;
WCHAR Root[2] = L"\\";
HANDLE Token = 0;
NTSTATUS Result;
if (FspFsctlTransactCreateKind == Request->Kind)
{
if (Request->Req.Create.OpenTargetDirectory)
FspPathSuffix((PWSTR)Request->Buffer, &FileName, &Suffix, Root);
else
FileName = (PWSTR)Request->Buffer;
Token = (HANDLE)Request->Req.Create.AccessToken;
}
else if (FspFsctlTransactSetInformationKind == Request->Kind &&
10/*FileRenameInformation*/ == Request->Req.SetInformation.FileInformationClass)
{
FileName = (PWSTR)(Request->Buffer + Request->Req.SetInformation.Info.Rename.NewFileName.Offset);
Token = (HANDLE)Request->Req.SetInformation.Info.Rename.AccessToken;
}
if (0 != FileName)
{
Result = FspPosixMapWindowsToPosixPath(FileName, &PosixPath);
if (FspFsctlTransactCreateKind == Request->Kind && Request->Req.Create.OpenTargetDirectory)
FspPathCombine((PWSTR)Request->Buffer, Suffix);
if (!NT_SUCCESS(Result))
goto exit;
}
if (0 != Token)
{
Result = fsp_fuse_get_token_uidgid(Token, TokenUser, &Uid, &Gid);
if (!NT_SUCCESS(Result))
goto exit;
}
context = fsp_fuse_get_context(f->env);
if (0 == context)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
fsp_fuse_op_enter_lock(FileSystem, Request, Response);
context->fuse = f;
context->private_data = f->data;
context->uid = Uid;
context->gid = Gid;
contexthdr = FSP_FUSE_HDR_FROM_CONTEXT(context);
contexthdr->PosixPath = PosixPath;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result) && 0 != PosixPath)
FspPosixDeletePath(PosixPath);
return Result;
}
NTSTATUS fsp_fuse_op_leave(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
struct fuse *f = FileSystem->UserContext;
struct fuse_context *context;
struct fsp_fuse_context_header *contexthdr;
fsp_fuse_op_leave_unlock(FileSystem, Request, Response);
context = fsp_fuse_get_context(f->env);
context->fuse = 0;
context->private_data = 0;
context->uid = -1;
context->gid = -1;
contexthdr = FSP_FUSE_HDR_FROM_CONTEXT(context);
if (0 != contexthdr->PosixPath)
FspPosixDeletePath(contexthdr->PosixPath);
memset(contexthdr, 0, sizeof *contexthdr);
return STATUS_SUCCESS;
}
static NTSTATUS fsp_fuse_intf_NewHiddenName(FSP_FILE_SYSTEM *FileSystem,
char *PosixPath, char **PPosixHiddenPath)
{
struct fuse *f = FileSystem->UserContext;
NTSTATUS Result;
char *PosixHiddenPath = 0;
char *p, *lastp;
size_t Size;
RPC_STATUS RpcStatus;
union
{
struct { UINT32 V[4]; } Values;
UUID Uuid;
} UuidBuf;
struct fuse_stat stbuf;
int err, maxtries = 3;
*PPosixHiddenPath = 0;
p = PosixPath;
for (;;)
{
while ('/' == *p)
p++;
lastp = p;
while ('/' != *p)
{
if ('\0' == *p)
goto loopend;
p++;
}
}
loopend:;
Size = lastp - PosixPath + sizeof ".fuse_hidden0123456789abcdef";
PosixHiddenPath = MemAlloc(Size);
if (0 == PosixHiddenPath)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
memcpy(PosixHiddenPath, PosixPath, lastp - PosixPath);
do
{
RpcStatus = UuidCreate(&UuidBuf.Uuid);
if (S_OK != RpcStatus && RPC_S_UUID_LOCAL_ONLY != RpcStatus)
{
Result = STATUS_INTERNAL_ERROR;
goto exit;
}
wsprintfA(PosixHiddenPath + (lastp - PosixPath),
".fuse_hidden%08lx%08lx",
UuidBuf.Values.V[0] ^ UuidBuf.Values.V[2],
UuidBuf.Values.V[1] ^ UuidBuf.Values.V[3]);
memset(&stbuf, 0, sizeof stbuf);
if (0 != f->ops.getattr)
err = f->ops.getattr(PosixHiddenPath, (void *)&stbuf);
else
err = -ENOSYS;
} while (0 == err && 0 < --maxtries);
if (0 == err)
{
Result = STATUS_DEVICE_BUSY; // current EBUSY mapping
goto exit;
}
*PPosixHiddenPath = PosixHiddenPath;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
MemFree(PosixHiddenPath);
return Result;
}
static BOOLEAN fsp_fuse_intf_CheckSymlinkDirectory(FSP_FILE_SYSTEM *FileSystem,
const char *PosixPath)
{
struct fuse *f = FileSystem->UserContext;
char *PosixDotPath = 0;
size_t Length;
struct fuse_stat stbuf;
int err;
BOOLEAN Result = FALSE;
Length = lstrlenA(PosixPath);
PosixDotPath = MemAlloc(Length + 3);
if (0 != PosixDotPath)
{
memcpy(PosixDotPath, PosixPath, Length);
PosixDotPath[Length + 0] = '/';
PosixDotPath[Length + 1] = '.';
PosixDotPath[Length + 2] = '\0';
if (0 != f->ops.getattr)
err = f->ops.getattr(PosixDotPath, (void *)&stbuf);
else
err = -ENOSYS;
MemFree(PosixDotPath);
Result = 0 == err && 0040000 == (stbuf.st_mode & 0170000);
}
return Result;
}
#define fsp_fuse_intf_GetFileInfoEx(FileSystem, PosixPath, fi, PUid, PGid, PMode, FileInfo)\
fsp_fuse_intf_GetFileInfoFunnel(FileSystem, PosixPath, fi, 0, PUid, PGid, PMode, 0, FileInfo)
static NTSTATUS fsp_fuse_intf_GetFileInfoFunnel(FSP_FILE_SYSTEM *FileSystem,
const char *PosixPath, struct fuse_file_info *fi, const struct fuse_stat *stbufp,
PUINT32 PUid, PUINT32 PGid, PUINT32 PMode, PUINT32 PDev,
FSP_FSCTL_FILE_INFO *FileInfo)
{
struct fuse *f = FileSystem->UserContext;
UINT64 AllocationUnit;
struct fuse_stat stbuf;
if (0 != stbufp)
memcpy(&stbuf, stbufp, sizeof stbuf);
else
{
int err;
memset(&stbuf, 0, sizeof stbuf);
if (0 != f->ops.fgetattr && 0 != fi && -1 != fi->fh)
err = f->ops.fgetattr(PosixPath, (void *)&stbuf, fi);
else if (0 != f->ops.getattr)
err = f->ops.getattr(PosixPath, (void *)&stbuf);
else
return STATUS_INVALID_DEVICE_REQUEST;
if (0 != err)
return fsp_fuse_ntstatus_from_errno(f->env, err);
}
if (f->set_umask)
stbuf.st_mode = (stbuf.st_mode & 0170000) | (0777 & ~f->umask);
if (f->set_uid)
stbuf.st_uid = f->uid;
if (f->set_gid)
stbuf.st_gid = f->gid;
*PUid = stbuf.st_uid;
*PGid = stbuf.st_gid;
*PMode = stbuf.st_mode;
if (0 != PDev)
*PDev = stbuf.st_rdev;
AllocationUnit = (UINT64)f->VolumeParams.SectorSize *
(UINT64)f->VolumeParams.SectorsPerAllocationUnit;
switch (stbuf.st_mode & 0170000)
{
case 0040000: /* S_IFDIR */
FileInfo->FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
FileInfo->ReparseTag = 0;
break;
case 0010000: /* S_IFIFO */
case 0020000: /* S_IFCHR */
case 0060000: /* S_IFBLK */
case 0140000: /* S_IFSOCK */
FileInfo->FileAttributes = FILE_ATTRIBUTE_REPARSE_POINT;
FileInfo->ReparseTag = IO_REPARSE_TAG_NFS;
break;
case 0120000: /* S_IFLNK */
if (FSP_FUSE_HAS_SYMLINKS(f))
{
FileInfo->FileAttributes = FILE_ATTRIBUTE_REPARSE_POINT;
FileInfo->ReparseTag = IO_REPARSE_TAG_SYMLINK;
if (fsp_fuse_intf_CheckSymlinkDirectory(FileSystem, PosixPath))
FileInfo->FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
break;
}
/* fall through */
default:
FileInfo->FileAttributes = 0;
FileInfo->ReparseTag = 0;
break;
}
FileInfo->FileSize = stbuf.st_size;
FileInfo->AllocationSize =
(FileInfo->FileSize + AllocationUnit - 1) / AllocationUnit * AllocationUnit;
FileInfo->CreationTime =
Int32x32To64(stbuf.st_birthtim.tv_sec, 10000000) + 116444736000000000 +
stbuf.st_birthtim.tv_nsec / 100;
FileInfo->LastAccessTime =
Int32x32To64(stbuf.st_atim.tv_sec, 10000000) + 116444736000000000 +
stbuf.st_atim.tv_nsec / 100;
FileInfo->LastWriteTime =
Int32x32To64(stbuf.st_mtim.tv_sec, 10000000) + 116444736000000000 +
stbuf.st_mtim.tv_nsec / 100;
FileInfo->ChangeTime =
Int32x32To64(stbuf.st_ctim.tv_sec, 10000000) + 116444736000000000 +
stbuf.st_ctim.tv_nsec / 100;
FileInfo->IndexNumber = stbuf.st_ino;
return STATUS_SUCCESS;
}
static NTSTATUS fsp_fuse_intf_GetSecurityEx(FSP_FILE_SYSTEM *FileSystem,
const char *PosixPath, struct fuse_file_info *fi,
PUINT32 PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptorBuf, SIZE_T *PSecurityDescriptorSize)
{
struct fuse *f = FileSystem->UserContext;
UINT32 Uid, Gid, Mode;
FSP_FSCTL_FILE_INFO FileInfo;
PSECURITY_DESCRIPTOR SecurityDescriptor = 0;
SIZE_T SecurityDescriptorSize;
NTSTATUS Result;
Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, PosixPath, fi, &Uid, &Gid, &Mode, &FileInfo);
if (!NT_SUCCESS(Result))
goto exit;
if (0 != PSecurityDescriptorSize)
{
Result = FspPosixMapPermissionsToSecurityDescriptor(Uid, Gid, Mode, &SecurityDescriptor);
if (!NT_SUCCESS(Result))
goto exit;
SecurityDescriptorSize = GetSecurityDescriptorLength(SecurityDescriptor);
if (SecurityDescriptorSize > *PSecurityDescriptorSize)
{
*PSecurityDescriptorSize = SecurityDescriptorSize;
Result = STATUS_BUFFER_OVERFLOW;
goto exit;
}
*PSecurityDescriptorSize = SecurityDescriptorSize;
if (0 != SecurityDescriptorBuf)
memcpy(SecurityDescriptorBuf, SecurityDescriptor, SecurityDescriptorSize);
}
if (0 != PFileAttributes)
*PFileAttributes = FileInfo.FileAttributes;
Result = STATUS_SUCCESS;
exit:
if (0 != SecurityDescriptor)
FspDeleteSecurityDescriptor(SecurityDescriptor,
FspPosixMapPermissionsToSecurityDescriptor);
return Result;
}
static NTSTATUS fsp_fuse_intf_GetReparsePointSymlink(FSP_FILE_SYSTEM *FileSystem,
const char *PosixPath, PVOID Buffer, PSIZE_T PSize)
{
struct fuse *f = FileSystem->UserContext;
char PosixTargetPath[FSP_FSCTL_TRANSACT_PATH_SIZEMAX / sizeof(WCHAR)];
PWSTR TargetPath = 0;
ULONG TargetPathLength;
int err;
NTSTATUS Result;
err = f->ops.readlink(PosixPath, PosixTargetPath, sizeof PosixTargetPath);
if (-EINVAL/* same on MSVC and Cygwin */ == err)
{
Result = STATUS_NOT_A_REPARSE_POINT;
goto exit;
}
else if (0 != err)
{
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
goto exit;
}
/* is this an absolute path? */
if ('/' == PosixTargetPath[0])
{
/* we do not support absolute paths without the rellinks option */
if (!f->rellinks)
{
Result = STATUS_ACCESS_DENIED;
goto exit;
}
}
Result = FspPosixMapPosixToWindowsPath(PosixTargetPath, &TargetPath);
if (!NT_SUCCESS(Result))
goto exit;
TargetPathLength = lstrlenW(TargetPath) * sizeof(WCHAR);
if (TargetPathLength > *PSize)
{
Result = STATUS_BUFFER_TOO_SMALL;
goto exit;
}
*PSize = TargetPathLength;
memcpy(Buffer, TargetPath, TargetPathLength);
Result = STATUS_SUCCESS;
exit:
if (0 != TargetPath)
FspPosixDeletePath(TargetPath);
return Result;
}
static NTSTATUS fsp_fuse_intf_GetReparsePointEx(FSP_FILE_SYSTEM *FileSystem,
const char *PosixPath, struct fuse_file_info *fi,
PVOID Buffer, PSIZE_T PSize)
{
struct fuse *f = FileSystem->UserContext;
UINT32 Uid, Gid, Mode, Dev;
FSP_FSCTL_FILE_INFO FileInfo;
PREPARSE_DATA_BUFFER ReparseData;
USHORT ReparseDataLength;
SIZE_T Size;
NTSTATUS Result;
Result = fsp_fuse_intf_GetFileInfoFunnel(FileSystem, PosixPath, fi, 0,
&Uid, &Gid, &Mode, &Dev, &FileInfo);
if (!NT_SUCCESS(Result))
return Result;
if (0 == (FILE_ATTRIBUTE_REPARSE_POINT & FileInfo.FileAttributes))
return STATUS_NOT_A_REPARSE_POINT;
if (0 == Buffer)
return STATUS_SUCCESS;
switch (Mode & 0170000)
{
case 0010000: /* S_IFIFO */
ReparseDataLength = (USHORT)(
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) -
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) +
8);
break;
case 0020000: /* S_IFCHR */
ReparseDataLength = (USHORT)(
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) -
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) +
16);
break;
case 0060000: /* S_IFBLK */
ReparseDataLength = (USHORT)(
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) -
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) +
16);
break;
case 0140000: /* S_IFSOCK */
ReparseDataLength = (USHORT)(
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) -
FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) +
8);
break;
case 0120000: /* S_IFLNK */
ReparseDataLength = (USHORT)(
FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer));
break;
default:
/* cannot happen! */
return STATUS_NOT_A_REPARSE_POINT;
}
if ((SIZE_T)FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) + ReparseDataLength > *PSize)
return STATUS_BUFFER_TOO_SMALL;
ReparseData = (PREPARSE_DATA_BUFFER)Buffer;
ReparseData->ReparseTag = FileInfo.ReparseTag;
ReparseData->ReparseDataLength = ReparseDataLength;
switch (Mode & 0170000)
{
case 0010000: /* S_IFIFO */
*(PUINT64)(ReparseData->GenericReparseBuffer.DataBuffer + 0) = NFS_SPECFILE_FIFO;
break;
case 0020000: /* S_IFCHR */
*(PUINT64)(ReparseData->GenericReparseBuffer.DataBuffer + 0) = NFS_SPECFILE_CHR;
*(PUINT32)(ReparseData->GenericReparseBuffer.DataBuffer + 8) = (Dev >> 16) & 0xffff;
*(PUINT32)(ReparseData->GenericReparseBuffer.DataBuffer + 12) = Dev & 0xffff;
break;
case 0060000: /* S_IFBLK */
*(PUINT64)(ReparseData->GenericReparseBuffer.DataBuffer + 0) = NFS_SPECFILE_BLK;
*(PUINT32)(ReparseData->GenericReparseBuffer.DataBuffer + 8) = (Dev >> 16) & 0xffff;
*(PUINT32)(ReparseData->GenericReparseBuffer.DataBuffer + 12) = Dev & 0xffff;
break;
case 0140000: /* S_IFSOCK */
*(PUINT64)(ReparseData->GenericReparseBuffer.DataBuffer + 0) = NFS_SPECFILE_SOCK;
break;
case 0120000: /* S_IFLNK */
Size = *PSize -
FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer);
Result = fsp_fuse_intf_GetReparsePointSymlink(FileSystem, PosixPath,
ReparseData->SymbolicLinkReparseBuffer.PathBuffer, &Size);
if (!NT_SUCCESS(Result))
return Result;
ReparseData->ReparseDataLength += (USHORT)Size;
ReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset = 0;
ReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength = (USHORT)Size;
ReparseData->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
ReparseData->SymbolicLinkReparseBuffer.PrintNameLength = (USHORT)Size;
ReparseData->SymbolicLinkReparseBuffer.Flags = SYMLINK_FLAG_RELATIVE;
break;
default:
/* cannot happen! */
return STATUS_NOT_A_REPARSE_POINT;
}
*PSize = FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) + ReparseData->ReparseDataLength;
return STATUS_SUCCESS;
}
static NTSTATUS fsp_fuse_intf_GetReparsePointByName(
FSP_FILE_SYSTEM *FileSystem, PVOID Context,
PWSTR FileName, BOOLEAN IsDirectory, PVOID Buffer, PSIZE_T PSize);
static NTSTATUS fsp_fuse_intf_GetVolumeInfo(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
struct fuse *f = FileSystem->UserContext;
struct fuse_statvfs stbuf;
int err;
memset(&stbuf, 0, sizeof stbuf);
if (0 != f->ops.statfs)
{
err = f->ops.statfs("/", &stbuf);
if (0 != err)
return fsp_fuse_ntstatus_from_errno(f->env, err);
}
VolumeInfo->TotalSize = (UINT64)stbuf.f_blocks * (UINT64)stbuf.f_frsize;
VolumeInfo->FreeSize = (UINT64)stbuf.f_bfree * (UINT64)stbuf.f_frsize;
VolumeInfo->VolumeLabelLength = f->VolumeLabelLength;
memcpy(&VolumeInfo->VolumeLabel, &f->VolumeLabel, f->VolumeLabelLength);
return STATUS_SUCCESS;
}
static NTSTATUS fsp_fuse_intf_SetVolumeLabel(FSP_FILE_SYSTEM *FileSystem,
PWSTR VolumeLabel,
FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
/*
* Implemented: there is no volume label concept in FUSE.
* Perhaps we can emulate it with a xattr on "/" one day.
*/
return STATUS_INVALID_PARAMETER;
}
static NTSTATUS fsp_fuse_intf_GetSecurityByName(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, PUINT32 PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptorBuf, SIZE_T *PSecurityDescriptorSize)
{
struct fuse *f = FileSystem->UserContext;
char *PosixPath = 0;
NTSTATUS Result;
Result = FspPosixMapWindowsToPosixPath(FileName, &PosixPath);
if (!NT_SUCCESS(Result))
goto exit;
Result = fsp_fuse_intf_GetSecurityEx(FileSystem, PosixPath, 0,
PFileAttributes, SecurityDescriptorBuf, PSecurityDescriptorSize);
if (!NT_SUCCESS(Result))
goto exit;
if (FSP_FUSE_HAS_SYMLINKS(f) &&
FspFileSystemFindReparsePoint(FileSystem, fsp_fuse_intf_GetReparsePointByName, 0,
FileName, PFileAttributes))
Result = STATUS_REPARSE;
else
Result = STATUS_SUCCESS;
exit:
if (0 != PosixPath)
FspPosixDeletePath(PosixPath);
return Result;
}
static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
PVOID *PFileNode, FSP_FSCTL_FILE_INFO *FileInfo)
{
struct fuse *f = FileSystem->UserContext;
struct fuse_context *context = fsp_fuse_get_context(f->env);
struct fsp_fuse_context_header *contexthdr = FSP_FUSE_HDR_FROM_CONTEXT(context);
UINT32 Uid, Gid, Mode;
FSP_FSCTL_FILE_INFO FileInfoBuf;
struct fsp_fuse_file_desc *filedesc = 0;
struct fuse_file_info fi;
BOOLEAN Opened = FALSE;
int err;
NTSTATUS Result;
filedesc = MemAlloc(sizeof *filedesc);
if (0 == filedesc)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
Uid = context->uid;
Gid = context->gid;
Mode = 0777;
if (0 != SecurityDescriptor)
{
Result = FspPosixMapSecurityDescriptorToPermissions(SecurityDescriptor,
&Uid, &Gid, &Mode);
if (!NT_SUCCESS(Result))
goto exit;
}
Mode &= ~context->umask;
memset(&fi, 0, sizeof fi);
if ('C' == f->env->environment) /* Cygwin */
fi.flags = 0x0200 | 2 /*O_CREAT|O_RDWR*/;
else
fi.flags = 0x0100 | 2 /*O_CREAT|O_RDWR*/;
if (CreateOptions & FILE_DIRECTORY_FILE)
{
if (0 != f->ops.mkdir)
{
err = f->ops.mkdir(contexthdr->PosixPath, Mode);
if (0 != err)
{
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
goto exit;
}
if (0 != f->ops.opendir)
{
err = f->ops.opendir(contexthdr->PosixPath, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else
{
fi.fh = -1;
Result = STATUS_SUCCESS;
}
}
else
Result = STATUS_INVALID_DEVICE_REQUEST;
}
else
{
if (0 != f->ops.create)
{
err = f->ops.create(contexthdr->PosixPath, Mode, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else if (0 != f->ops.mknod && 0 != f->ops.open)
{
err = f->ops.mknod(contexthdr->PosixPath, Mode, 0);
if (0 != err)
{
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
goto exit;
}
err = f->ops.open(contexthdr->PosixPath, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else
Result = STATUS_INVALID_DEVICE_REQUEST;
}
if (!NT_SUCCESS(Result))
goto exit;
Opened = TRUE;
if (Uid != context->uid || Gid != context->gid)
if (0 != f->ops.chown)
{
err = f->ops.chown(contexthdr->PosixPath, Uid, Gid);
if (0 != err)
{
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
goto exit;
}
}
/*
* Ignore fuse_file_info::direct_io, fuse_file_info::keep_cache
* WinFsp does not currently support disabling the cache manager
* for an individual file although it should not be hard to add
* if required.
*
* Ignore fuse_file_info::nonseekable.
*/
Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, contexthdr->PosixPath, &fi,
&Uid, &Gid, &Mode, &FileInfoBuf);
if (!NT_SUCCESS(Result))
goto exit;
*PFileNode = filedesc;
memcpy(FileInfo, &FileInfoBuf, sizeof FileInfoBuf);
filedesc->PosixPath = contexthdr->PosixPath;
filedesc->IsDirectory = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_DIRECTORY);
filedesc->IsReparsePoint = FALSE;
filedesc->OpenFlags = fi.flags;
filedesc->FileHandle = fi.fh;
filedesc->DirBuffer = 0;
contexthdr->PosixPath = 0;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
{
if (Opened)
{
if (CreateOptions & FILE_DIRECTORY_FILE)
{
if (0 != f->ops.releasedir)
f->ops.releasedir(filedesc->PosixPath, &fi);
}
else
{
if (0 != f->ops.release)
f->ops.release(filedesc->PosixPath, &fi);
}
}
MemFree(filedesc);
}
return Result;
}
static NTSTATUS fsp_fuse_intf_Open(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
PVOID *PFileNode, FSP_FSCTL_FILE_INFO *FileInfo)
{
struct fuse *f = FileSystem->UserContext;
struct fuse_context *context = fsp_fuse_get_context(f->env);
struct fsp_fuse_context_header *contexthdr = FSP_FUSE_HDR_FROM_CONTEXT(context);
UINT32 Uid, Gid, Mode;
FSP_FSCTL_FILE_INFO FileInfoBuf;
struct fsp_fuse_file_desc *filedesc = 0;
struct fuse_file_info fi;
int err;
NTSTATUS Result;
Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, contexthdr->PosixPath, 0,
&Uid, &Gid, &Mode, &FileInfoBuf);
if (!NT_SUCCESS(Result))
goto exit;
filedesc = MemAlloc(sizeof *filedesc);
if (0 == filedesc)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
memset(&fi, 0, sizeof fi);
switch (GrantedAccess & (FILE_READ_DATA | FILE_WRITE_DATA))
{
default:
case FILE_READ_DATA:
fi.flags = 0/*O_RDONLY*/;
break;
case FILE_WRITE_DATA:
fi.flags = 1/*O_WRONLY*/;
break;
case FILE_READ_DATA | FILE_WRITE_DATA:
fi.flags = 2/*O_RDWR*/;
break;
}
if (FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
if (0 != f->ops.opendir)
{
err = f->ops.opendir(contexthdr->PosixPath, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else
{
fi.fh = -1;
Result = STATUS_SUCCESS;
}
}
else if (FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
{
fi.fh = -1;
Result = STATUS_SUCCESS;
}
else
{
if (0 != f->ops.open)
{
err = f->ops.open(contexthdr->PosixPath, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else
Result = STATUS_INVALID_DEVICE_REQUEST;
}
if (!NT_SUCCESS(Result))
goto exit;
/*
* Ignore fuse_file_info::direct_io, fuse_file_info::keep_cache
* WinFsp does not currently support disabling the cache manager
* for an individual file although it should not be hard to add
* if required.
*
* Ignore fuse_file_info::nonseekable.
*/
*PFileNode = filedesc;
memcpy(FileInfo, &FileInfoBuf, sizeof FileInfoBuf);
filedesc->PosixPath = contexthdr->PosixPath;
filedesc->IsDirectory = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_DIRECTORY);
filedesc->IsReparsePoint = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT);
filedesc->OpenFlags = fi.flags;
filedesc->FileHandle = fi.fh;
filedesc->DirBuffer = 0;
contexthdr->PosixPath = 0;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
MemFree(filedesc);
return Result;
}
static NTSTATUS fsp_fuse_intf_Overwrite(FSP_FILE_SYSTEM *FileSystem,
PVOID FileNode, UINT32 FileAttributes, BOOLEAN ReplaceFileAttributes, UINT64 AllocationSize,
FSP_FSCTL_FILE_INFO *FileInfo)
{
struct fuse *f = FileSystem->UserContext;
struct fsp_fuse_file_desc *filedesc = FileNode;
UINT32 Uid, Gid, Mode;
struct fuse_file_info fi;
int err;
NTSTATUS Result;
if (filedesc->IsDirectory || filedesc->IsReparsePoint)
return STATUS_ACCESS_DENIED;
if (0 != f->ops.ftruncate)
{
memset(&fi, 0, sizeof fi);
fi.flags = filedesc->OpenFlags;
fi.fh = filedesc->FileHandle;
err = f->ops.ftruncate(filedesc->PosixPath, 0, &fi);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else if (0 != f->ops.truncate)
{
err = f->ops.truncate(filedesc->PosixPath, 0);
Result = fsp_fuse_ntstatus_from_errno(f->env, err);
}
else
Result = STATUS_INVALID_DEVICE_REQUEST;
if (!NT_SUCCESS(Result))
return Result;
return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
&Uid, &Gid, &Mode, FileInfo);
}
static VOID fsp_fuse_intf_Cleanup(FSP_FILE_SYSTEM *FileSystem,
PVOID FileNode, PWSTR FileName, ULONG Flags)
{
struct fuse *f = FileSystem->UserContext;
struct fsp_fuse_file_desc *filedesc = FileNode;
/*
* In Windows a DeleteFile/RemoveDirectory is the sequence of the following:
* Create(FILE_OPEN)
* SetInformation(Disposition)
* Cleanup
* Close