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|
#ifdef _WIN32
#include "lock_enabled.h"
#include "logger.h"
#include "platform.h"
#include <winfsp/winfsp.h>
#include <cerrno>
#include <limits>
#include <memory>
#include <mutex>
#include <stdint.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/utime.h>
#include <time.h>
#include <typeinfo>
#include <VersionHelpers.h>
#include <Windows.h>
#include <io.h>
#include <sddl.h>
#include <strsafe.h>
static void(WINAPI* best_get_time_func)(LPFILETIME) = nullptr;
static inline uint64_t convert_dword_pair(uint64_t low_part, uint64_t high_part)
{
return low_part | (high_part << 32);
}
static void filetime_to_unix_time(const FILETIME* ft, struct fuse_timespec* out)
{
long long ll = convert_dword_pair(ft->dwLowDateTime, ft->dwHighDateTime) - 116444736000000000LL;
static const long long FACTOR = 10000000LL;
out->tv_sec = ll / FACTOR;
out->tv_nsec = (ll % FACTOR) * 100;
}
static FILETIME unix_time_to_filetime(const fuse_timespec* t)
{
long long ll = t->tv_sec * 10000000LL + t->tv_nsec / 100LL + 116444736000000000LL;
FILETIME res;
res.dwLowDateTime = (DWORD)ll;
res.dwHighDateTime = (DWORD)(ll >> 32);
return res;
}
static const DWORD MAX_SINGLE_BLOCK = std::numeric_limits<DWORD>::max();
namespace securefs
{
class WindowsException : public SystemException
{
private:
DWORD err;
const wchar_t* funcname;
std::wstring path1, path2;
public:
explicit WindowsException(DWORD err,
const wchar_t* funcname,
std::wstring path1,
std::wstring path2)
: err(err), funcname(funcname), path1(std::move(path1)), path2(std::move(path2))
{
}
explicit WindowsException(DWORD err, const wchar_t* funcname, std::wstring path)
: err(err), funcname(funcname), path1(std::move(path))
{
}
explicit WindowsException(DWORD err, const wchar_t* funcname) : err(err), funcname(funcname) {}
~WindowsException() {}
std::string message() const override
{
wchar_t system_buffer[2000];
wchar_t final_buffer[6000];
if (!FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM,
nullptr,
err,
0,
system_buffer,
array_length(system_buffer),
nullptr))
{
system_buffer[0] = 0;
}
// Strip any trailing CRLF
for (ptrdiff_t i = wcslen(system_buffer) - 1; i >= 0; --i)
{
if (system_buffer[i] == L'\r' || system_buffer[i] == L'\n')
system_buffer[i] = 0;
else
break;
}
if (!path1.empty() && !path2.empty())
{
StringCchPrintfW(final_buffer,
array_length(final_buffer),
L"error %lu %s (%s(path1=%s, path2=%s))",
err,
system_buffer,
funcname,
path1.c_str(),
path2.c_str());
}
else if (!path1.empty())
{
StringCchPrintfW(final_buffer,
array_length(final_buffer),
L"error %lu %s (%s(path=%s))",
err,
system_buffer,
funcname,
path1.c_str());
}
else
{
StringCchPrintfW(final_buffer,
array_length(final_buffer),
L"error %lu %s (%s)",
err,
system_buffer,
funcname);
}
return narrow_string(final_buffer);
}
DWORD win32_code() const noexcept { return err; }
int error_number() const noexcept override
{
static const int errorTable[] = {
0,
EINVAL, /* ERROR_INVALID_FUNCTION 1 */
ENOENT, /* ERROR_FILE_NOT_FOUND 2 */
ENOENT, /* ERROR_PATH_NOT_FOUND 3 */
EMFILE, /* ERROR_TOO_MANY_OPEN_FILES 4 */
EACCES, /* ERROR_ACCESS_DENIED 5 */
EBADF, /* ERROR_INVALID_HANDLE 6 */
ENOMEM, /* ERROR_ARENA_TRASHED 7 */
ENOMEM, /* ERROR_NOT_ENOUGH_MEMORY 8 */
ENOMEM, /* ERROR_INVALID_BLOCK 9 */
E2BIG, /* ERROR_BAD_ENVIRONMENT 10 */
ENOEXEC, /* ERROR_BAD_FORMAT 11 */
EACCES, /* ERROR_INVALID_ACCESS 12 */
EINVAL, /* ERROR_INVALID_DATA 13 */
EFAULT, /* ERROR_OUT_OF_MEMORY 14 */
ENOENT, /* ERROR_INVALID_DRIVE 15 */
EACCES, /* ERROR_CURRENT_DIRECTORY 16 */
EXDEV, /* ERROR_NOT_SAME_DEVICE 17 */
ENOENT, /* ERROR_NO_MORE_FILES 18 */
EROFS, /* ERROR_WRITE_PROTECT 19 */
ENXIO, /* ERROR_BAD_UNIT 20 */
EBUSY, /* ERROR_NOT_READY 21 */
EIO, /* ERROR_BAD_COMMAND 22 */
EIO, /* ERROR_CRC 23 */
EIO, /* ERROR_BAD_LENGTH 24 */
EIO, /* ERROR_SEEK 25 */
EIO, /* ERROR_NOT_DOS_DISK 26 */
ENXIO, /* ERROR_SECTOR_NOT_FOUND 27 */
EBUSY, /* ERROR_OUT_OF_PAPER 28 */
EIO, /* ERROR_WRITE_FAULT 29 */
EIO, /* ERROR_READ_FAULT 30 */
EIO, /* ERROR_GEN_FAILURE 31 */
EACCES, /* ERROR_SHARING_VIOLATION 32 */
EACCES, /* ERROR_LOCK_VIOLATION 33 */
ENXIO, /* ERROR_WRONG_DISK 34 */
ENFILE, /* ERROR_FCB_UNAVAILABLE 35 */
ENFILE, /* ERROR_SHARING_BUFFER_EXCEEDED 36 */
EINVAL, /* 37 */
EINVAL, /* 38 */
ENOSPC, /* ERROR_HANDLE_DISK_FULL 39 */
EINVAL, /* 40 */
EINVAL, /* 41 */
EINVAL, /* 42 */
EINVAL, /* 43 */
EINVAL, /* 44 */
EINVAL, /* 45 */
EINVAL, /* 46 */
EINVAL, /* 47 */
EINVAL, /* 48 */
EINVAL, /* 49 */
ENODEV, /* ERROR_NOT_SUPPORTED 50 */
EBUSY, /* ERROR_REM_NOT_LIST 51 */
EEXIST, /* ERROR_DUP_NAME 52 */
ENOENT, /* ERROR_BAD_NETPATH 53 */
EBUSY, /* ERROR_NETWORK_BUSY 54 */
ENODEV, /* ERROR_DEV_NOT_EXIST 55 */
EAGAIN, /* ERROR_TOO_MANY_CMDS 56 */
EIO, /* ERROR_ADAP_HDW_ERR 57 */
EIO, /* ERROR_BAD_NET_RESP 58 */
EIO, /* ERROR_UNEXP_NET_ERR 59 */
EINVAL, /* ERROR_BAD_REM_ADAP 60 */
EFBIG, /* ERROR_PRINTQ_FULL 61 */
ENOSPC, /* ERROR_NO_SPOOL_SPACE 62 */
ENOENT, /* ERROR_PRINT_CANCELLED 63 */
ENOENT, /* ERROR_NETNAME_DELETED 64 */
EACCES, /* ERROR_NETWORK_ACCESS_DENIED 65 */
ENODEV, /* ERROR_BAD_DEV_TYPE 66 */
ENOENT, /* ERROR_BAD_NET_NAME 67 */
ENFILE, /* ERROR_TOO_MANY_NAMES 68 */
EIO, /* ERROR_TOO_MANY_SESS 69 */
EAGAIN, /* ERROR_SHARING_PAUSED 70 */
EINVAL, /* ERROR_REQ_NOT_ACCEP 71 */
EAGAIN, /* ERROR_REDIR_PAUSED 72 */
EINVAL, /* 73 */
EINVAL, /* 74 */
EINVAL, /* 75 */
EINVAL, /* 76 */
EINVAL, /* 77 */
EINVAL, /* 78 */
EINVAL, /* 79 */
EEXIST, /* ERROR_FILE_EXISTS 80 */
EINVAL, /* 81 */
ENOSPC, /* ERROR_CANNOT_MAKE 82 */
EIO, /* ERROR_FAIL_I24 83 */
ENFILE, /* ERROR_OUT_OF_STRUCTURES 84 */
EEXIST, /* ERROR_ALREADY_ASSIGNED 85 */
EPERM, /* ERROR_INVALID_PASSWORD 86 */
EINVAL, /* ERROR_INVALID_PARAMETER 87 */
EIO, /* ERROR_NET_WRITE_FAULT 88 */
EAGAIN, /* ERROR_NO_PROC_SLOTS 89 */
EINVAL, /* 90 */
EINVAL, /* 91 */
EINVAL, /* 92 */
EINVAL, /* 93 */
EINVAL, /* 94 */
EINVAL, /* 95 */
EINVAL, /* 96 */
EINVAL, /* 97 */
EINVAL, /* 98 */
EINVAL, /* 99 */
EINVAL, /* 100 */
EINVAL, /* 101 */
EINVAL, /* 102 */
EINVAL, /* 103 */
EINVAL, /* 104 */
EINVAL, /* 105 */
EINVAL, /* 106 */
EXDEV, /* ERROR_DISK_CHANGE 107 */
EAGAIN, /* ERROR_DRIVE_LOCKED 108 */
EPIPE, /* ERROR_BROKEN_PIPE 109 */
ENOENT, /* ERROR_OPEN_FAILED 110 */
EINVAL, /* ERROR_BUFFER_OVERFLOW 111 */
ENOSPC, /* ERROR_DISK_FULL 112 */
EMFILE, /* ERROR_NO_MORE_SEARCH_HANDLES 113 */
EBADF, /* ERROR_INVALID_TARGET_HANDLE 114 */
EFAULT, /* ERROR_PROTECTION_VIOLATION 115 */
EINVAL, /* 116 */
EINVAL, /* 117 */
EINVAL, /* 118 */
EINVAL, /* 119 */
EINVAL, /* 120 */
EINVAL, /* 121 */
EINVAL, /* 122 */
ENOENT, /* ERROR_INVALID_NAME 123 */
EINVAL, /* 124 */
EINVAL, /* 125 */
EINVAL, /* 126 */
ESRCH, /* ERROR_PROC_NOT_FOUND 127 */
ECHILD, /* ERROR_WAIT_NO_CHILDREN 128 */
ECHILD, /* ERROR_CHILD_NOT_COMPLETE 129 */
EBADF, /* ERROR_DIRECT_ACCESS_HANDLE 130 */
EINVAL, /* 131 */
ESPIPE, /* ERROR_SEEK_ON_DEVICE 132 */
EINVAL, /* 133 */
EINVAL, /* 134 */
EINVAL, /* 135 */
EINVAL, /* 136 */
EINVAL, /* 137 */
EINVAL, /* 138 */
EINVAL, /* 139 */
EINVAL, /* 140 */
EINVAL, /* 141 */
EAGAIN, /* ERROR_BUSY_DRIVE 142 */
EINVAL, /* 143 */
EINVAL, /* 144 */
ENOTEMPTY, /* ERROR_DIR_NOT_EMPTY 145 */
EINVAL, /* 146 */
EINVAL, /* 147 */
EINVAL, /* 148 */
EINVAL, /* 149 */
EINVAL, /* 150 */
EINVAL, /* 151 */
EINVAL, /* 152 */
EINVAL, /* 153 */
EINVAL, /* 154 */
EINVAL, /* 155 */
EINVAL, /* 156 */
EINVAL, /* 157 */
EACCES, /* ERROR_NOT_LOCKED 158 */
EINVAL, /* 159 */
EINVAL, /* 160 */
ENOENT, /* ERROR_BAD_PATHNAME 161 */
EINVAL, /* 162 */
EINVAL, /* 163 */
EINVAL, /* 164 */
EINVAL, /* 165 */
EINVAL, /* 166 */
EAGAIN, /* ERROR_LOCK_FAILED 167 */
EINVAL, /* 168 */
EINVAL, /* 169 */
EINVAL, /* 170 */
EINVAL, /* 171 */
EINVAL, /* 172 */
EINVAL, /* 173 */
EINVAL, /* 174 */
EINVAL, /* 175 */
EINVAL, /* 176 */
EINVAL, /* 177 */
EINVAL, /* 178 */
EINVAL, /* 179 */
EINVAL, /* 180 */
EINVAL, /* 181 */
EINVAL, /* 182 */
EEXIST, /* ERROR_ALREADY_EXISTS 183 */
ECHILD, /* ERROR_NO_CHILD_PROCESS 184 */
EINVAL, /* 185 */
EINVAL, /* 186 */
EINVAL, /* 187 */
EINVAL, /* 188 */
EINVAL, /* 189 */
EINVAL, /* 190 */
EINVAL, /* 191 */
EINVAL, /* 192 */
EINVAL, /* 193 */
EINVAL, /* 194 */
EINVAL, /* 195 */
EINVAL, /* 196 */
EINVAL, /* 197 */
EINVAL, /* 198 */
EINVAL, /* 199 */
EINVAL, /* 200 */
EINVAL, /* 201 */
EINVAL, /* 202 */
EINVAL, /* 203 */
EINVAL, /* 204 */
EINVAL, /* 205 */
ENAMETOOLONG, /* ERROR_FILENAME_EXCED_RANGE 206 */
EINVAL, /* 207 */
EINVAL, /* 208 */
EINVAL, /* 209 */
EINVAL, /* 210 */
EINVAL, /* 211 */
EINVAL, /* 212 */
EINVAL, /* 213 */
EINVAL, /* 214 */
EINVAL, /* 215 */
EINVAL, /* 216 */
EINVAL, /* 217 */
EINVAL, /* 218 */
EINVAL, /* 219 */
EINVAL, /* 220 */
EINVAL, /* 221 */
EINVAL, /* 222 */
EINVAL, /* 223 */
EINVAL, /* 224 */
EINVAL, /* 225 */
EINVAL, /* 226 */
EINVAL, /* 227 */
EINVAL, /* 228 */
EINVAL, /* 229 */
EPIPE, /* ERROR_BAD_PIPE 230 */
EAGAIN, /* ERROR_PIPE_BUSY 231 */
EPIPE, /* ERROR_NO_DATA 232 */
EPIPE, /* ERROR_PIPE_NOT_CONNECTED 233 */
EINVAL, /* 234 */
EINVAL, /* 235 */
EINVAL, /* 236 */
EINVAL, /* 237 */
EINVAL, /* 238 */
EINVAL, /* 239 */
EINVAL, /* 240 */
EINVAL, /* 241 */
EINVAL, /* 242 */
EINVAL, /* 243 */
EINVAL, /* 244 */
EINVAL, /* 245 */
EINVAL, /* 246 */
EINVAL, /* 247 */
EINVAL, /* 248 */
EINVAL, /* 249 */
EINVAL, /* 250 */
EINVAL, /* 251 */
EINVAL, /* 252 */
EINVAL, /* 253 */
EINVAL, /* 254 */
EINVAL, /* 255 */
EINVAL, /* 256 */
EINVAL, /* 257 */
EINVAL, /* 258 */
EINVAL, /* 259 */
EINVAL, /* 260 */
EINVAL, /* 261 */
EINVAL, /* 262 */
EINVAL, /* 263 */
EINVAL, /* 264 */
EINVAL, /* 265 */
EINVAL, /* 266 */
ENOTDIR, /* ERROR_DIRECTORY 267 */
};
if (err >= 0 && err < array_length(errorTable))
return errorTable[err];
return EPERM;
}
};
[[noreturn]] void throw_windows_exception(const wchar_t* funcname)
{
DWORD err = GetLastError();
throw WindowsException(err, funcname);
}
#define THROW_WINDOWS_EXCEPTION(err, exp) \
do \
{ \
DWORD code = err; \
throw WindowsException(code, exp); \
} while (0)
#define THROW_WINDOWS_EXCEPTION_WITH_PATH(err, exp, path) \
do \
{ \
DWORD code = err; \
throw WindowsException(code, exp, path); \
} while (0)
#define THROW_WINDOWS_EXCEPTION_WITH_TWO_PATHS(err, exp, path1, path2) \
do \
{ \
DWORD code = err; \
throw WindowsException(code, exp, path1, path2); \
} while (0)
#define CHECK_CALL(exp) \
if (!(exp)) \
THROW_WINDOWS_EXCEPTION(GetLastError(), L"" #exp);
static void stat_file_handle(HANDLE hd, struct fuse_stat* st)
{
memset(st, 0, sizeof(*st));
BY_HANDLE_FILE_INFORMATION info;
CHECK_CALL(GetFileInformationByHandle(hd, &info));
filetime_to_unix_time(&info.ftLastAccessTime, &st->st_atim);
filetime_to_unix_time(&info.ftLastWriteTime, &st->st_mtim);
filetime_to_unix_time(&info.ftCreationTime, &st->st_birthtim);
st->st_ctim = st->st_mtim;
st->st_nlink = static_cast<fuse_nlink_t>(info.nNumberOfLinks);
st->st_uid = securefs::OSService::getuid();
st->st_gid = securefs::OSService::getgid();
if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
st->st_mode = S_IFDIR | 0755;
else
st->st_mode = S_IFREG | 0755;
st->st_dev = info.dwVolumeSerialNumber;
st->st_ino = convert_dword_pair(info.nFileIndexLow, info.nFileIndexHigh);
st->st_size = convert_dword_pair(info.nFileSizeLow, info.nFileSizeHigh);
st->st_blksize = 4096;
st->st_blocks = (st->st_size + 4095) / 4096 * (4096 / 512);
}
class WindowsFileStream final : public FileStream
{
private:
HANDLE m_handle;
bool m_is_ntfs;
private:
void write32(const void* input, offset_type offset, DWORD length)
{
OVERLAPPED ol;
memset(&ol, 0, sizeof(ol));
ol.Offset = static_cast<DWORD>(offset);
ol.OffsetHigh = static_cast<DWORD>(offset >> 32);
DWORD writelen;
CHECK_CALL(WriteFile(m_handle, input, length, &writelen, &ol));
if (writelen != length)
throwVFSException(EIO);
}
void write32(const void* input, DWORD length)
{
DWORD writelen;
CHECK_CALL(WriteFile(m_handle, input, length, &writelen, nullptr));
if (writelen != length)
throwVFSException(EIO);
}
length_type read32(void* output, offset_type offset, DWORD length)
{
OVERLAPPED ol;
memset(&ol, 0, sizeof(ol));
ol.Offset = static_cast<DWORD>(offset);
ol.OffsetHigh = static_cast<DWORD>(offset >> 32);
DWORD readlen;
if (!ReadFile(m_handle, output, length, &readlen, &ol))
{
DWORD err = GetLastError();
if (err == ERROR_HANDLE_EOF)
return 0;
THROW_WINDOWS_EXCEPTION(err, L"ReadFile");
}
return readlen;
}
length_type read32(void* output, DWORD length)
{
DWORD readlen;
if (!ReadFile(m_handle, output, length, &readlen, nullptr))
{
DWORD err = GetLastError();
if (err == ERROR_HANDLE_EOF)
return 0;
THROW_WINDOWS_EXCEPTION(err, L"ReadFile");
}
return readlen;
}
public:
explicit WindowsFileStream(WideStringRef path, int flags, unsigned mode)
: m_handle(INVALID_HANDLE_VALUE), m_is_ntfs(false)
{
DWORD access_flags = 0;
switch (flags & O_ACCMODE)
{
case O_RDONLY:
access_flags = GENERIC_READ;
break;
case O_WRONLY:
access_flags = GENERIC_WRITE;
break;
case O_RDWR:
access_flags = GENERIC_READ | GENERIC_WRITE;
break;
default:
throwVFSException(EINVAL);
}
DWORD create_flags = 0;
if (flags & O_CREAT)
{
if (flags & O_EXCL)
create_flags = CREATE_NEW;
else
create_flags = OPEN_ALWAYS;
}
else if (flags & O_TRUNC)
{
create_flags = TRUNCATE_EXISTING;
}
else
{
create_flags = OPEN_EXISTING;
}
m_handle = CreateFileW(path.c_str(),
access_flags,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
nullptr,
create_flags,
FILE_ATTRIBUTE_NORMAL,
nullptr);
if (m_handle == INVALID_HANDLE_VALUE)
{
DWORD err = GetLastError();
throw WindowsException(err, L"CreateFileW", path.to_string());
}
wchar_t fsname[128];
if (!GetVolumeInformationByHandleW(
m_handle, nullptr, 0, nullptr, nullptr, 0, fsname, array_length(fsname)))
return;
m_is_ntfs = (CompareStringEx(
LOCALE_NAME_INVARIANT, NORM_IGNORECASE, fsname, -1, L"NTFS", -1, 0, 0, 0)
== CSTR_EQUAL);
TRACE_LOG("Opening file on a %s volume", narrow_string(fsname).c_str());
}
~WindowsFileStream() { CloseHandle(m_handle); }
void lock(bool exclusive) override
{
if (!securefs::is_lock_enabled())
{
return;
}
OVERLAPPED o;
memset(&o, 0, sizeof(o));
CHECK_CALL(LockFileEx(m_handle,
exclusive ? LOCKFILE_EXCLUSIVE_LOCK : 0,
0,
std::numeric_limits<DWORD>::max(),
std::numeric_limits<DWORD>::max(),
&o));
}
void unlock() noexcept override
{
if (!securefs::is_lock_enabled())
{
return;
}
OVERLAPPED o;
memset(&o, 0, sizeof(o));
(void)(UnlockFileEx(
m_handle, 0, std::numeric_limits<DWORD>::max(), std::numeric_limits<DWORD>::max(), &o));
}
void close() noexcept override
{
CloseHandle(m_handle);
m_handle = INVALID_HANDLE_VALUE;
}
length_type read(void* output, offset_type offset, length_type length) override
{
length_type total = 0;
while (length > MAX_SINGLE_BLOCK)
{
length_type readlen = read32(output, offset, MAX_SINGLE_BLOCK);
if (readlen == 0)
return total;
length -= readlen;
offset += readlen;
output = static_cast<char*>(output) + readlen;
total += readlen;
}
total += read32(output, offset, static_cast<DWORD>(length));
return total;
}
length_type sequential_read(void* output, length_type length) override
{
length_type total = 0;
while (length > MAX_SINGLE_BLOCK)
{
length_type readlen = read32(output, MAX_SINGLE_BLOCK);
if (readlen == 0)
return total;
length -= readlen;
output = static_cast<char*>(output) + readlen;
total += readlen;
}
total += read32(output, static_cast<DWORD>(length));
return total;
}
void write(const void* input, offset_type offset, length_type length) override
{
if (offset > size())
resize(offset + length); // Ensure that intervening data is zeroed
while (length > MAX_SINGLE_BLOCK)
{
write32(input, offset, MAX_SINGLE_BLOCK);
length -= MAX_SINGLE_BLOCK;
offset += MAX_SINGLE_BLOCK;
input = static_cast<const char*>(input) + MAX_SINGLE_BLOCK;
}
write32(input, offset, static_cast<DWORD>(length));
}
void sequential_write(const void* input, length_type length) override
{
while (length > MAX_SINGLE_BLOCK)
{
write32(input, MAX_SINGLE_BLOCK);
length -= MAX_SINGLE_BLOCK;
input = static_cast<const char*>(input) + MAX_SINGLE_BLOCK;
}
write32(input, static_cast<DWORD>(length));
}
length_type size() const override
{
_LARGE_INTEGER SIZE;
CHECK_CALL(GetFileSizeEx(m_handle, &SIZE));
return SIZE.QuadPart;
}
void flush() override {}
void resize(length_type len) override
{
if (!m_is_ntfs)
{
// For files on other filesystems, SetEndOfFile beyond end will leave intervening bytes
// uninitialized
// Manually zeroing ourselves
auto old_size = this->size();
if (old_size < len)
{
const char buffer[4096] = {0};
for (size_t sz = old_size; sz < len; sz += sizeof(buffer))
write32(buffer, sz, std::min<size_t>(sizeof(buffer), len - sz));
return;
}
}
LARGE_INTEGER llen;
llen.QuadPart = len;
CHECK_CALL(SetFilePointerEx(m_handle, llen, nullptr, FILE_BEGIN));
CHECK_CALL(SetEndOfFile(m_handle));
}
length_type optimal_block_size() const noexcept override { return 4096; }
void fsync() override { CHECK_CALL(FlushFileBuffers(m_handle)); }
void utimens(const struct fuse_timespec ts[2]) override
{
FILETIME access_time, mod_time;
if (!ts)
{
best_get_time_func(&access_time);
mod_time = access_time;
}
else
{
access_time = unix_time_to_filetime(ts + 0);
mod_time = unix_time_to_filetime(ts + 1);
}
CHECK_CALL(SetFileTime(m_handle, nullptr, &access_time, &mod_time));
}
void fstat(struct fuse_stat* st) const override { stat_file_handle(m_handle, st); }
bool is_sparse() const noexcept override { return m_is_ntfs; }
};
OSService::OSService() : m_root_handle(INVALID_HANDLE_VALUE) {}
OSService::~OSService() { CloseHandle(m_root_handle); }
bool OSService::is_absolute(StringRef path)
{
return path.empty() || path[0] == '/' || path[0] == '\\'
|| (path.size() >= 2 && path[1] == ':');
}
native_string_type OSService::concat_and_norm(StringRef base_dir, StringRef path)
{
if (base_dir.empty() || is_absolute(path))
{
return widen_string(path);
}
if (!is_absolute(base_dir))
{
throwInvalidArgumentException("base_dir must be an absolute path, yet we received "
+ base_dir);
}
std::string prepath = base_dir.to_string();
prepath.reserve(prepath.size() + 1 + path.size());
prepath.push_back('\\');
prepath.append(path.data(), path.size());
for (char& c : prepath)
{
if (c == '/')
c = '\\';
}
std::vector<std::string> components = split(prepath, '\\');
std::vector<const std::string*> norm_components;
norm_components.reserve(components.size());
for (const std::string& name : components)
{
if (name.empty() || name == ".")
continue;
if (name == "..")
{
if (norm_components.size() > 0)
norm_components.pop_back();
continue;
}
norm_components.push_back(&name);
}
std::string str;
str.reserve(prepath.size() + 8);
bool is_already_universal = prepath.size() >= 2 && prepath[0] == '\\' && prepath[1] == '\\';
if (is_already_universal)
{
str.push_back('\\');
}
else
{
str.assign(("\\\\?"));
}
for (const std::string* name : norm_components)
{
str.push_back('\\');
str.append(*name);
}
return widen_string(str);
}
OSService::OSService(StringRef path)
{
wchar_t resolved[4000];
CHECK_CALL(GetFullPathNameW(widen_string(path).c_str(), 4000, resolved, nullptr));
m_dir_name = narrow_string(resolved);
m_root_handle = CreateFileW(resolved,
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
nullptr,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
nullptr);
if (m_root_handle == INVALID_HANDLE_VALUE)
THROW_WINDOWS_EXCEPTION_WITH_PATH(GetLastError(), L"CreateFileW", resolved);
}
std::shared_ptr<FileStream>
OSService::open_file_stream(StringRef path, int flags, unsigned mode) const
{
return std::make_shared<WindowsFileStream>(norm_path(path), flags, mode);
}
void OSService::remove_file(StringRef path) const
{
CHECK_CALL(DeleteFileW(norm_path(path).c_str()));
}
void OSService::remove_directory(StringRef path) const
{
CHECK_CALL(RemoveDirectoryW(norm_path(path).c_str()));
}
void OSService::lock() const
{
if (!securefs::is_lock_enabled())
{
return;
}
fprintf(stderr,
"Warning: Windows does not support directory locking. "
"Be careful not to mount the same data directory multiple times!\n");
}
void OSService::mkdir(StringRef path, unsigned mode) const
{
auto npath = norm_path(path);
if (CreateDirectoryW(npath.c_str(), nullptr) == 0)
{
DWORD err = GetLastError();
THROW_WINDOWS_EXCEPTION_WITH_PATH(err, L"CreateDirectory", npath);
}
}
void OSService::statfs(struct fuse_statvfs* fs_info) const
{
memset(fs_info, 0, sizeof(*fs_info));
ULARGE_INTEGER FreeBytesAvailable, TotalNumberOfBytes, TotalNumberOfFreeBytes;
DWORD namemax = 0;
CHECK_CALL(GetDiskFreeSpaceExW(
norm_path(".").c_str(), &FreeBytesAvailable, &TotalNumberOfBytes, &TotalNumberOfFreeBytes));
CHECK_CALL(GetVolumeInformationByHandleW(
m_root_handle, nullptr, 0, nullptr, &namemax, nullptr, nullptr, 0));
auto maximum = static_cast<unsigned>(-1);
fs_info->f_bsize = 4096;
fs_info->f_frsize = fs_info->f_bsize;
fs_info->f_bfree = TotalNumberOfFreeBytes.QuadPart / fs_info->f_bsize;
fs_info->f_blocks = TotalNumberOfBytes.QuadPart / fs_info->f_bsize;
fs_info->f_bavail = FreeBytesAvailable.QuadPart / fs_info->f_bsize;
fs_info->f_files = maximum;
fs_info->f_ffree = maximum;
fs_info->f_favail = maximum;
fs_info->f_namemax = namemax;
}
void OSService::utimens(StringRef path, const fuse_timespec ts[2]) const
{
FILETIME atime, mtime;
if (!ts)
{
best_get_time_func(&atime);
mtime = atime;
}
else
{
atime = unix_time_to_filetime(ts);
mtime = unix_time_to_filetime(ts + 1);
}
auto npath = norm_path(path);
HANDLE hd = CreateFileW(npath.c_str(),
FILE_WRITE_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_DELETE | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
nullptr);
if (hd == INVALID_HANDLE_VALUE)
THROW_WINDOWS_EXCEPTION_WITH_PATH(GetLastError(), L"CreateFileW", npath);
DEFER(CloseHandle(hd));
CHECK_CALL(SetFileTime(hd, nullptr, &atime, &mtime));
}
bool OSService::stat(StringRef path, struct fuse_stat* stat) const
{
if (path == "." && m_root_handle != INVALID_HANDLE_VALUE)
{
// Special case which occurs very frequently
stat_file_handle(m_root_handle, stat);
return true;
}
auto npath = norm_path(path);
HANDLE handle = CreateFileW(npath.c_str(),
FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_DELETE | FILE_SHARE_WRITE,
nullptr,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
nullptr);
if (handle == INVALID_HANDLE_VALUE)
{
DWORD err = GetLastError();
if (err == ERROR_PATH_NOT_FOUND || err == ERROR_FILE_NOT_FOUND || err == ERROR_NOT_FOUND)
return false;
THROW_WINDOWS_EXCEPTION_WITH_PATH(err, L"CreateFileW", npath);
}
DEFER(CloseHandle(handle));
stat_file_handle(handle, stat);
return true;
}
void OSService::link(StringRef source, StringRef dest) const { throwVFSException(ENOSYS); }
void OSService::chmod(StringRef path, fuse_mode_t mode) const { (void)0; }
void OSService::chown(StringRef, fuse_uid_t, fuse_gid_t) const { (void)0; }
ssize_t OSService::readlink(StringRef path, char* output, size_t size) const
{
throwVFSException(ENOSYS);
}
void OSService::symlink(StringRef source, StringRef dest) const { throwVFSException(ENOSYS); }
void OSService::rename(StringRef a, StringRef b) const
{
auto wa = norm_path(a);
auto wb = norm_path(b);
if (!MoveFileExW(wa.c_str(), wb.c_str(), MOVEFILE_REPLACE_EXISTING))
THROW_WINDOWS_EXCEPTION_WITH_TWO_PATHS(GetLastError(), L"MoveFileExW", wa, wb);
}
int OSService::raise_fd_limit()
{
return 65535;
// The handle limit on Windows is high enough that no adjustments are necessary
}
class WindowsDirectoryTraverser final : public DirectoryTraverser
{
private:
std::wstring m_pattern;
WIN32_FIND_DATAW m_data;
HANDLE m_handle;
bool m_is_initial;
public:
explicit WindowsDirectoryTraverser(std::wstring pattern)
: m_pattern(std::move(pattern)), m_handle(INVALID_HANDLE_VALUE), m_is_initial(false)
{
rewind();
}
~WindowsDirectoryTraverser()
{
if (m_handle != INVALID_HANDLE_VALUE)
FindClose(m_handle);
}
void rewind() override
{
if (m_is_initial)
return; // Already at the beginning
if (m_handle != INVALID_HANDLE_VALUE)
FindClose(m_handle);
m_handle = FindFirstFileW(m_pattern.c_str(), &m_data);
if (m_handle == INVALID_HANDLE_VALUE)
{
THROW_WINDOWS_EXCEPTION_WITH_PATH(GetLastError(), L"FindFirstFileW", m_pattern);
}
}
bool next(std::string* name, struct fuse_stat* st) override
{
if (m_is_initial)
{
m_is_initial = false;
}
else
{
if (!FindNextFileW(m_handle, &m_data))
{
DWORD err = GetLastError();
if (err == ERROR_NO_MORE_FILES)
return false;
THROW_WINDOWS_EXCEPTION_WITH_PATH(err, L"FindNextFileW", m_pattern);
}
}
if (name)
*name = narrow_string(m_data.cFileName);
if (st)
{
if (m_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
st->st_mode = 0755 | S_IFDIR;
else
st->st_mode = 0755 | S_IFREG;
st->st_size = convert_dword_pair(m_data.nFileSizeLow, m_data.nFileSizeHigh);
filetime_to_unix_time(&m_data.ftCreationTime, &st->st_birthtim);
filetime_to_unix_time(&m_data.ftLastAccessTime, &st->st_atim);
filetime_to_unix_time(&m_data.ftLastWriteTime, &st->st_mtim);
st->st_ctim = st->st_mtim;
st->st_nlink = 1;
st->st_blksize = 4096;
st->st_blocks = st->st_size / 512;
}
return true;
}
};
std::unique_ptr<DirectoryTraverser> OSService::create_traverser(StringRef dir) const
{
return securefs::make_unique<WindowsDirectoryTraverser>(norm_path(dir) + L"\\*");
}
uint32_t OSService::getuid() noexcept { return 0; }
uint32_t OSService::getgid() noexcept { return 0; }
void OSService::get_current_time(fuse_timespec& current_time)
{
FILETIME ft;
best_get_time_func(&ft);
filetime_to_unix_time(&ft, ¤t_time);
}
void OSService::get_current_time_in_tm(struct tm* tm, int* ns)
{
fuse_timespec spec;
get_current_time(spec);
time_t tts = spec.tv_sec;
gmtime_s(tm, &tts);
*ns = spec.tv_nsec;
}
void OSService::read_password_no_confirmation(const char* prompt,
CryptoPP::AlignedSecByteBlock* output)
{
byte buffer[4000];
DEFER(CryptoPP::SecureWipeBuffer(buffer, array_length(buffer)));
size_t bufsize = 0;
HANDLE in = GetStdHandle(STD_INPUT_HANDLE);
DWORD old_mode, new_mode;
if (GetConsoleMode(in, &old_mode))
{
// Success, guess we are reading from user input instead of a pipe
fputs(prompt, stderr);
fflush(stderr);
new_mode = old_mode & ~(DWORD)ENABLE_ECHO_INPUT;
SetConsoleMode(in, new_mode);
}
while (1)
{
int c = getchar();
if (c == '\r' || c == '\n' || c == EOF)
break;
if (bufsize < array_length(buffer))
{
buffer[bufsize] = static_cast<byte>(c);
++bufsize;
}
else
{
throw_runtime_error("Password exceeds 4000 characters");
}
}
if (SetConsoleMode(in, old_mode))
putc('\n', stderr);
output->resize(bufsize);
memcpy(output->data(), buffer, bufsize);
}
void OSService::read_password_with_confirmation(const char* prompt,
CryptoPP::AlignedSecByteBlock* output)
{
CryptoPP::AlignedSecByteBlock another;
read_password_no_confirmation(prompt, output);
read_password_no_confirmation("Again: ", &another);
if (output->size() != another.size()
|| memcmp(output->data(), another.data(), another.size()) != 0)
throw_runtime_error("Password mismatch!");
}
std::string OSService::stringify_system_error(int errcode)
{
char buffer[4000];
strerror_s(buffer, array_length(buffer), errcode);
return buffer;
}
void windows_init(void)
{
::SetConsoleOutputCP(CP_UTF8);
// Use a large buffer to prevent Windows from chopping valid UTF-8 sequences.
setvbuf(stdout, nullptr, _IOFBF, 65535);
setvbuf(stderr, nullptr, _IOFBF, 65535);
if (::FspLoad(nullptr) != STATUS_SUCCESS)
{
fputs("SecureFS cannot load WinFsp. Please make sure you have WinFsp properly installed.\n",
stderr);
abort();
}
HMODULE hd = GetModuleHandleW(L"kernel32.dll");
best_get_time_func = reinterpret_cast<decltype(best_get_time_func)>(
GetProcAddress(hd, "GetSystemTimePreciseAsFileTime"));
if (best_get_time_func == nullptr)
best_get_time_func = &GetSystemTimeAsFileTime;
}
std::wstring widen_string(StringRef str)
{
if (str.size() >= std::numeric_limits<int>::max())
throwInvalidArgumentException("String too long");
int sz = MultiByteToWideChar(CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), nullptr, 0);
if (sz <= 0)
THROW_WINDOWS_EXCEPTION(GetLastError(), L"MultiByteToWideChar");
std::wstring result(sz, 0);
MultiByteToWideChar(CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), &result[0], sz);
return result;
}
std::string narrow_string(WideStringRef str)
{
if (str.size() >= std::numeric_limits<int>::max())
throwInvalidArgumentException("String too long");
int sz = WideCharToMultiByte(
CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), nullptr, 0, 0, 0);
if (sz <= 0)
THROW_WINDOWS_EXCEPTION(GetLastError(), L"WideCharToMultiByte");
std::string result(sz, 0);
WideCharToMultiByte(
CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), &result[0], sz, 0, 0);
return result;
}
class WindowsColourSetter : public ConsoleColourSetter
{
private:
HANDLE hd;
WORD originalForegroundAttributes;
WORD originalBackgroundAttributes;
void setTextAttribute(WORD _textAttribute) noexcept
{
SetConsoleTextAttribute(hd, _textAttribute | originalBackgroundAttributes);
}
public:
explicit WindowsColourSetter(HANDLE hd) : hd(hd)
{
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
GetConsoleScreenBufferInfo(hd, &csbiInfo);
originalForegroundAttributes = csbiInfo.wAttributes
& ~(BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_BLUE | BACKGROUND_INTENSITY);
originalBackgroundAttributes = csbiInfo.wAttributes
& ~(FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
}
void use(Colour::Code _colourCode) noexcept override
{
switch (_colourCode)
{
case Colour::Default:
return setTextAttribute(originalForegroundAttributes);
case Colour::White:
return setTextAttribute(FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE);
case Colour::Red:
return setTextAttribute(FOREGROUND_RED);
case Colour::Green:
return setTextAttribute(FOREGROUND_GREEN);
case Colour::Blue:
return setTextAttribute(FOREGROUND_BLUE);
case Colour::Cyan:
return setTextAttribute(FOREGROUND_BLUE | FOREGROUND_GREEN);
case Colour::Yellow:
return setTextAttribute(FOREGROUND_RED | FOREGROUND_GREEN);
case Colour::Grey:
return setTextAttribute(0);
case Colour::LightGrey:
return setTextAttribute(FOREGROUND_INTENSITY);
case Colour::BrightRed:
return setTextAttribute(FOREGROUND_INTENSITY | FOREGROUND_RED);
case Colour::BrightGreen:
return setTextAttribute(FOREGROUND_INTENSITY | FOREGROUND_GREEN);
case Colour::BrightWhite:
return setTextAttribute(FOREGROUND_INTENSITY | FOREGROUND_GREEN | FOREGROUND_RED
| FOREGROUND_BLUE);
default:
break;
}
}
};
std::unique_ptr<ConsoleColourSetter> ConsoleColourSetter::create_setter(FILE* fp)
{
if (!fp)
return {};
auto hd = reinterpret_cast<HANDLE>(_get_osfhandle(_fileno(fp)));
DWORD mode;
if (!GetConsoleMode(hd, &mode))
return {}; // Not a console
return securefs::make_unique<WindowsColourSetter>(hd);
}
std::unique_ptr<const char, void (*)(const char*)> get_type_name(const std::exception& e) noexcept
{
return {typeid(e).name(), [](const char*) { /* no op */ }};
}
const char* PATH_SEPARATOR_STRING = "\\";
const char PATH_SEPARATOR_CHAR = '\\';
} // namespace securefs
#endif
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