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commands-win32.c
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/*
* QEMU Guest Agent win32-specific command implementations
*
* Copyright IBM Corp. 2012
*
* Authors:
* Michael Roth <[email protected]>
* Gal Hammer <[email protected]>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include <wtypes.h>
#include <powrprof.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iptypes.h>
#include <iphlpapi.h>
#ifdef CONFIG_QGA_NTDDSCSI
#include <winioctl.h>
#include <ntddscsi.h>
#include <setupapi.h>
#include <initguid.h>
#endif
#include <lm.h>
#include <wtsapi32.h>
#include <wininet.h>
#include "guest-agent-core.h"
#include "vss-win32.h"
#include "qga-qapi-commands.h"
#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qemu/queue.h"
#include "qemu/host-utils.h"
#include "qemu/base64.h"
#ifndef SHTDN_REASON_FLAG_PLANNED
#define SHTDN_REASON_FLAG_PLANNED 0x80000000
#endif
/* multiple of 100 nanoseconds elapsed between windows baseline
* (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */
#define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \
(365 * (1970 - 1601) + \
(1970 - 1601) / 4 - 3))
#define INVALID_SET_FILE_POINTER ((DWORD)-1)
typedef struct GuestFileHandle {
int64_t id;
HANDLE fh;
QTAILQ_ENTRY(GuestFileHandle) next;
} GuestFileHandle;
static struct {
QTAILQ_HEAD(, GuestFileHandle) filehandles;
} guest_file_state = {
.filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles),
};
#define FILE_GENERIC_APPEND (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA)
typedef struct OpenFlags {
const char *forms;
DWORD desired_access;
DWORD creation_disposition;
} OpenFlags;
static OpenFlags guest_file_open_modes[] = {
{"r", GENERIC_READ, OPEN_EXISTING},
{"rb", GENERIC_READ, OPEN_EXISTING},
{"w", GENERIC_WRITE, CREATE_ALWAYS},
{"wb", GENERIC_WRITE, CREATE_ALWAYS},
{"a", FILE_GENERIC_APPEND, OPEN_ALWAYS },
{"r+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
{"rb+", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
{"r+b", GENERIC_WRITE|GENERIC_READ, OPEN_EXISTING},
{"w+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
{"wb+", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
{"w+b", GENERIC_WRITE|GENERIC_READ, CREATE_ALWAYS},
{"a+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS },
{"ab+", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS },
{"a+b", FILE_GENERIC_APPEND|GENERIC_READ, OPEN_ALWAYS }
};
#define debug_error(msg) do { \
char *suffix = g_win32_error_message(GetLastError()); \
g_debug("%s: %s", (msg), suffix); \
g_free(suffix); \
} while (0)
static OpenFlags *find_open_flag(const char *mode_str)
{
int mode;
Error **errp = NULL;
for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
OpenFlags *flags = guest_file_open_modes + mode;
if (strcmp(flags->forms, mode_str) == 0) {
return flags;
}
}
error_setg(errp, "invalid file open mode '%s'", mode_str);
return NULL;
}
static int64_t guest_file_handle_add(HANDLE fh, Error **errp)
{
GuestFileHandle *gfh;
int64_t handle;
handle = ga_get_fd_handle(ga_state, errp);
if (handle < 0) {
return -1;
}
gfh = g_new0(GuestFileHandle, 1);
gfh->id = handle;
gfh->fh = fh;
QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next);
return handle;
}
static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
{
GuestFileHandle *gfh;
QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) {
if (gfh->id == id) {
return gfh;
}
}
error_setg(errp, "handle '%" PRId64 "' has not been found", id);
return NULL;
}
static void handle_set_nonblocking(HANDLE fh)
{
DWORD file_type, pipe_state;
file_type = GetFileType(fh);
if (file_type != FILE_TYPE_PIPE) {
return;
}
/* If file_type == FILE_TYPE_PIPE, according to MSDN
* the specified file is socket or named pipe */
if (!GetNamedPipeHandleState(fh, &pipe_state, NULL,
NULL, NULL, NULL, 0)) {
return;
}
/* The fd is named pipe fd */
if (pipe_state & PIPE_NOWAIT) {
return;
}
pipe_state |= PIPE_NOWAIT;
SetNamedPipeHandleState(fh, &pipe_state, NULL, NULL);
}
int64_t qmp_guest_file_open(const char *path, bool has_mode,
const char *mode, Error **errp)
{
int64_t fd = -1;
HANDLE fh;
HANDLE templ_file = NULL;
DWORD share_mode = FILE_SHARE_READ;
DWORD flags_and_attr = FILE_ATTRIBUTE_NORMAL;
LPSECURITY_ATTRIBUTES sa_attr = NULL;
OpenFlags *guest_flags;
GError *gerr = NULL;
wchar_t *w_path = NULL;
if (!has_mode) {
mode = "r";
}
slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
guest_flags = find_open_flag(mode);
if (guest_flags == NULL) {
error_setg(errp, "invalid file open mode");
goto done;
}
w_path = g_utf8_to_utf16(path, -1, NULL, NULL, &gerr);
if (!w_path) {
goto done;
}
fh = CreateFileW(w_path, guest_flags->desired_access, share_mode, sa_attr,
guest_flags->creation_disposition, flags_and_attr,
templ_file);
if (fh == INVALID_HANDLE_VALUE) {
error_setg_win32(errp, GetLastError(), "failed to open file '%s'",
path);
goto done;
}
/* set fd non-blocking to avoid common use cases (like reading from a
* named pipe) from hanging the agent
*/
handle_set_nonblocking(fh);
fd = guest_file_handle_add(fh, errp);
if (fd < 0) {
CloseHandle(fh);
error_setg(errp, "failed to add handle to qmp handle table");
goto done;
}
slog("guest-file-open, handle: % " PRId64, fd);
done:
if (gerr) {
error_setg(errp, QERR_QGA_COMMAND_FAILED, gerr->message);
g_error_free(gerr);
}
g_free(w_path);
return fd;
}
void qmp_guest_file_close(int64_t handle, Error **errp)
{
bool ret;
GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
slog("guest-file-close called, handle: %" PRId64, handle);
if (gfh == NULL) {
return;
}
ret = CloseHandle(gfh->fh);
if (!ret) {
error_setg_win32(errp, GetLastError(), "failed close handle");
return;
}
QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next);
g_free(gfh);
}
static void acquire_privilege(const char *name, Error **errp)
{
HANDLE token = NULL;
TOKEN_PRIVILEGES priv;
Error *local_err = NULL;
if (OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &token))
{
if (!LookupPrivilegeValue(NULL, name, &priv.Privileges[0].Luid)) {
error_setg(&local_err, QERR_QGA_COMMAND_FAILED,
"no luid for requested privilege");
goto out;
}
priv.PrivilegeCount = 1;
priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!AdjustTokenPrivileges(token, FALSE, &priv, 0, NULL, 0)) {
error_setg(&local_err, QERR_QGA_COMMAND_FAILED,
"unable to acquire requested privilege");
goto out;
}
} else {
error_setg(&local_err, QERR_QGA_COMMAND_FAILED,
"failed to open privilege token");
}
out:
if (token) {
CloseHandle(token);
}
error_propagate(errp, local_err);
}
static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque,
Error **errp)
{
Error *local_err = NULL;
HANDLE thread = CreateThread(NULL, 0, func, opaque, 0, NULL);
if (!thread) {
error_setg(&local_err, QERR_QGA_COMMAND_FAILED,
"failed to dispatch asynchronous command");
error_propagate(errp, local_err);
}
}
void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
{
Error *local_err = NULL;
UINT shutdown_flag = EWX_FORCE;
slog("guest-shutdown called, mode: %s", mode);
if (!has_mode || strcmp(mode, "powerdown") == 0) {
shutdown_flag |= EWX_POWEROFF;
} else if (strcmp(mode, "halt") == 0) {
shutdown_flag |= EWX_SHUTDOWN;
} else if (strcmp(mode, "reboot") == 0) {
shutdown_flag |= EWX_REBOOT;
} else {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "mode",
"halt|powerdown|reboot");
return;
}
/* Request a shutdown privilege, but try to shut down the system
anyway. */
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (!ExitWindowsEx(shutdown_flag, SHTDN_REASON_FLAG_PLANNED)) {
slog("guest-shutdown failed: %lu", GetLastError());
error_setg(errp, QERR_UNDEFINED_ERROR);
}
}
GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
int64_t count, Error **errp)
{
GuestFileRead *read_data = NULL;
guchar *buf;
HANDLE fh;
bool is_ok;
DWORD read_count;
GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
if (!gfh) {
return NULL;
}
if (!has_count) {
count = QGA_READ_COUNT_DEFAULT;
} else if (count < 0 || count >= UINT32_MAX) {
error_setg(errp, "value '%" PRId64
"' is invalid for argument count", count);
return NULL;
}
fh = gfh->fh;
buf = g_malloc0(count+1);
is_ok = ReadFile(fh, buf, count, &read_count, NULL);
if (!is_ok) {
error_setg_win32(errp, GetLastError(), "failed to read file");
slog("guest-file-read failed, handle %" PRId64, handle);
} else {
buf[read_count] = 0;
read_data = g_new0(GuestFileRead, 1);
read_data->count = (size_t)read_count;
read_data->eof = read_count == 0;
if (read_count != 0) {
read_data->buf_b64 = g_base64_encode(buf, read_count);
}
}
g_free(buf);
return read_data;
}
GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
bool has_count, int64_t count,
Error **errp)
{
GuestFileWrite *write_data = NULL;
guchar *buf;
gsize buf_len;
bool is_ok;
DWORD write_count;
GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
HANDLE fh;
if (!gfh) {
return NULL;
}
fh = gfh->fh;
buf = qbase64_decode(buf_b64, -1, &buf_len, errp);
if (!buf) {
return NULL;
}
if (!has_count) {
count = buf_len;
} else if (count < 0 || count > buf_len) {
error_setg(errp, "value '%" PRId64
"' is invalid for argument count", count);
goto done;
}
is_ok = WriteFile(fh, buf, count, &write_count, NULL);
if (!is_ok) {
error_setg_win32(errp, GetLastError(), "failed to write to file");
slog("guest-file-write-failed, handle: %" PRId64, handle);
} else {
write_data = g_new0(GuestFileWrite, 1);
write_data->count = (size_t) write_count;
}
done:
g_free(buf);
return write_data;
}
GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
GuestFileWhence *whence_code,
Error **errp)
{
GuestFileHandle *gfh;
GuestFileSeek *seek_data;
HANDLE fh;
LARGE_INTEGER new_pos, off_pos;
off_pos.QuadPart = offset;
BOOL res;
int whence;
Error *err = NULL;
gfh = guest_file_handle_find(handle, errp);
if (!gfh) {
return NULL;
}
/* We stupidly exposed 'whence':'int' in our qapi */
whence = ga_parse_whence(whence_code, &err);
if (err) {
error_propagate(errp, err);
return NULL;
}
fh = gfh->fh;
res = SetFilePointerEx(fh, off_pos, &new_pos, whence);
if (!res) {
error_setg_win32(errp, GetLastError(), "failed to seek file");
return NULL;
}
seek_data = g_new0(GuestFileSeek, 1);
seek_data->position = new_pos.QuadPart;
return seek_data;
}
void qmp_guest_file_flush(int64_t handle, Error **errp)
{
HANDLE fh;
GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
if (!gfh) {
return;
}
fh = gfh->fh;
if (!FlushFileBuffers(fh)) {
error_setg_win32(errp, GetLastError(), "failed to flush file");
}
}
#ifdef CONFIG_QGA_NTDDSCSI
static STORAGE_BUS_TYPE win2qemu[] = {
[BusTypeUnknown] = GUEST_DISK_BUS_TYPE_UNKNOWN,
[BusTypeScsi] = GUEST_DISK_BUS_TYPE_SCSI,
[BusTypeAtapi] = GUEST_DISK_BUS_TYPE_IDE,
[BusTypeAta] = GUEST_DISK_BUS_TYPE_IDE,
[BusType1394] = GUEST_DISK_BUS_TYPE_IEEE1394,
[BusTypeSsa] = GUEST_DISK_BUS_TYPE_SSA,
[BusTypeFibre] = GUEST_DISK_BUS_TYPE_SSA,
[BusTypeUsb] = GUEST_DISK_BUS_TYPE_USB,
[BusTypeRAID] = GUEST_DISK_BUS_TYPE_RAID,
[BusTypeiScsi] = GUEST_DISK_BUS_TYPE_ISCSI,
[BusTypeSas] = GUEST_DISK_BUS_TYPE_SAS,
[BusTypeSata] = GUEST_DISK_BUS_TYPE_SATA,
[BusTypeSd] = GUEST_DISK_BUS_TYPE_SD,
[BusTypeMmc] = GUEST_DISK_BUS_TYPE_MMC,
#if (_WIN32_WINNT >= 0x0601)
[BusTypeVirtual] = GUEST_DISK_BUS_TYPE_VIRTUAL,
[BusTypeFileBackedVirtual] = GUEST_DISK_BUS_TYPE_FILE_BACKED_VIRTUAL,
#endif
};
static GuestDiskBusType find_bus_type(STORAGE_BUS_TYPE bus)
{
if (bus >= ARRAY_SIZE(win2qemu) || (int)bus < 0) {
return GUEST_DISK_BUS_TYPE_UNKNOWN;
}
return win2qemu[(int)bus];
}
/* XXX: The following function is BROKEN!
*
* It does not work and probably has never worked. When we query for list of
* disks we get cryptic names like "\Device\0000001d" instead of
* "\PhysicalDriveX" or "\HarddiskX". Whether the names can be translated one
* way or the other for comparison is an open question.
*
* When we query volume names (the original version) we are able to match those
* but then the property queries report error "Invalid function". (duh!)
*/
/*
DEFINE_GUID(GUID_DEVINTERFACE_VOLUME,
0x53f5630dL, 0xb6bf, 0x11d0, 0x94, 0xf2,
0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
*/
DEFINE_GUID(GUID_DEVINTERFACE_DISK,
0x53f56307L, 0xb6bf, 0x11d0, 0x94, 0xf2,
0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
static GuestPCIAddress *get_pci_info(char *guid, Error **errp)
{
HDEVINFO dev_info;
SP_DEVINFO_DATA dev_info_data;
DWORD size = 0;
int i;
char dev_name[MAX_PATH];
char *buffer = NULL;
GuestPCIAddress *pci = NULL;
char *name = NULL;
bool partial_pci = false;
pci = g_malloc0(sizeof(*pci));
pci->domain = -1;
pci->slot = -1;
pci->function = -1;
pci->bus = -1;
if (g_str_has_prefix(guid, "\\\\.\\") ||
g_str_has_prefix(guid, "\\\\?\\")) {
name = g_strdup(guid + 4);
} else {
name = g_strdup(guid);
}
if (!QueryDosDevice(name, dev_name, ARRAY_SIZE(dev_name))) {
error_setg_win32(errp, GetLastError(), "failed to get dos device name");
goto out;
}
dev_info = SetupDiGetClassDevs(&GUID_DEVINTERFACE_DISK, 0, 0,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (dev_info == INVALID_HANDLE_VALUE) {
error_setg_win32(errp, GetLastError(), "failed to get devices tree");
goto out;
}
g_debug("enumerating devices");
dev_info_data.cbSize = sizeof(SP_DEVINFO_DATA);
for (i = 0; SetupDiEnumDeviceInfo(dev_info, i, &dev_info_data); i++) {
DWORD addr, bus, slot, data, size2;
int func, dev;
while (!SetupDiGetDeviceRegistryProperty(dev_info, &dev_info_data,
SPDRP_PHYSICAL_DEVICE_OBJECT_NAME,
&data, (PBYTE)buffer, size,
&size2)) {
size = MAX(size, size2);
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
g_free(buffer);
/* Double the size to avoid problems on
* W2k MBCS systems per KB 888609.
* https://support.microsoft.com/en-us/kb/259695 */
buffer = g_malloc(size * 2);
} else {
error_setg_win32(errp, GetLastError(),
"failed to get device name");
goto free_dev_info;
}
}
if (g_strcmp0(buffer, dev_name)) {
continue;
}
g_debug("found device %s", dev_name);
/* There is no need to allocate buffer in the next functions. The size
* is known and ULONG according to
* https://support.microsoft.com/en-us/kb/253232
* https://msdn.microsoft.com/en-us/library/windows/hardware/ff543095(v=vs.85).aspx
*/
if (!SetupDiGetDeviceRegistryProperty(dev_info, &dev_info_data,
SPDRP_BUSNUMBER, &data, (PBYTE)&bus, size, NULL)) {
debug_error("failed to get bus");
bus = -1;
partial_pci = true;
}
/* The function retrieves the device's address. This value will be
* transformed into device function and number */
if (!SetupDiGetDeviceRegistryProperty(dev_info, &dev_info_data,
SPDRP_ADDRESS, &data, (PBYTE)&addr, size, NULL)) {
debug_error("failed to get address");
addr = -1;
partial_pci = true;
}
/* This call returns UINumber of DEVICE_CAPABILITIES structure.
* This number is typically a user-perceived slot number. */
if (!SetupDiGetDeviceRegistryProperty(dev_info, &dev_info_data,
SPDRP_UI_NUMBER, &data, (PBYTE)&slot, size, NULL)) {
debug_error("failed to get slot");
slot = -1;
partial_pci = true;
}
/* SetupApi gives us the same information as driver with
* IoGetDeviceProperty. According to Microsoft
* https://support.microsoft.com/en-us/kb/253232
* FunctionNumber = (USHORT)((propertyAddress) & 0x0000FFFF);
* DeviceNumber = (USHORT)(((propertyAddress) >> 16) & 0x0000FFFF);
* SPDRP_ADDRESS is propertyAddress, so we do the same.*/
if (partial_pci) {
pci->domain = -1;
pci->slot = -1;
pci->function = -1;
pci->bus = -1;
} else {
func = ((int) addr == -1) ? -1 : addr & 0x0000FFFF;
dev = ((int) addr == -1) ? -1 : (addr >> 16) & 0x0000FFFF;
pci->domain = dev;
pci->slot = (int) slot;
pci->function = func;
pci->bus = (int) bus;
}
break;
}
free_dev_info:
SetupDiDestroyDeviceInfoList(dev_info);
out:
g_free(buffer);
g_free(name);
return pci;
}
static void get_disk_properties(HANDLE vol_h, GuestDiskAddress *disk,
Error **errp)
{
STORAGE_PROPERTY_QUERY query;
STORAGE_DEVICE_DESCRIPTOR *dev_desc, buf;
DWORD received;
ULONG size = sizeof(buf);
dev_desc = &buf;
query.PropertyId = StorageDeviceProperty;
query.QueryType = PropertyStandardQuery;
if (!DeviceIoControl(vol_h, IOCTL_STORAGE_QUERY_PROPERTY, &query,
sizeof(STORAGE_PROPERTY_QUERY), dev_desc,
size, &received, NULL)) {
error_setg_win32(errp, GetLastError(), "failed to get bus type");
return;
}
disk->bus_type = find_bus_type(dev_desc->BusType);
g_debug("bus type %d", disk->bus_type);
/* Query once more. Now with long enough buffer. */
size = dev_desc->Size;
dev_desc = g_malloc0(size);
if (!DeviceIoControl(vol_h, IOCTL_STORAGE_QUERY_PROPERTY, &query,
sizeof(STORAGE_PROPERTY_QUERY), dev_desc,
size, &received, NULL)) {
error_setg_win32(errp, GetLastError(), "failed to get serial number");
g_debug("failed to get serial number");
goto out_free;
}
if (dev_desc->SerialNumberOffset > 0) {
const char *serial;
size_t len;
if (dev_desc->SerialNumberOffset >= received) {
error_setg(errp, "failed to get serial number: offset outside the buffer");
g_debug("serial number offset outside the buffer");
goto out_free;
}
serial = (char *)dev_desc + dev_desc->SerialNumberOffset;
len = received - dev_desc->SerialNumberOffset;
g_debug("serial number \"%s\"", serial);
if (*serial != 0) {
disk->serial = g_strndup(serial, len);
disk->has_serial = true;
}
}
out_free:
g_free(dev_desc);
return;
}
static void get_single_disk_info(GuestDiskAddress *disk, Error **errp)
{
SCSI_ADDRESS addr, *scsi_ad;
DWORD len;
HANDLE disk_h;
Error *local_err = NULL;
scsi_ad = &addr;
g_debug("getting disk info for: %s", disk->dev);
disk_h = CreateFile(disk->dev, 0, FILE_SHARE_READ, NULL, OPEN_EXISTING,
0, NULL);
if (disk_h == INVALID_HANDLE_VALUE) {
error_setg_win32(errp, GetLastError(), "failed to open disk");
return;
}
get_disk_properties(disk_h, disk, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto err_close;
}
g_debug("bus type %d", disk->bus_type);
/* always set pci_controller as required by schema. get_pci_info() should
* report -1 values for non-PCI buses rather than fail. fail the command
* if that doesn't hold since that suggests some other unexpected
* breakage
*/
disk->pci_controller = get_pci_info(disk->dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto err_close;
}
if (disk->bus_type == GUEST_DISK_BUS_TYPE_SCSI
|| disk->bus_type == GUEST_DISK_BUS_TYPE_IDE
|| disk->bus_type == GUEST_DISK_BUS_TYPE_RAID
/* This bus type is not supported before Windows Server 2003 SP1 */
|| disk->bus_type == GUEST_DISK_BUS_TYPE_SAS
) {
/* We are able to use the same ioctls for different bus types
* according to Microsoft docs
* https://technet.microsoft.com/en-us/library/ee851589(v=ws.10).aspx */
g_debug("getting pci-controller info");
if (DeviceIoControl(disk_h, IOCTL_SCSI_GET_ADDRESS, NULL, 0, scsi_ad,
sizeof(SCSI_ADDRESS), &len, NULL)) {
disk->unit = addr.Lun;
disk->target = addr.TargetId;
disk->bus = addr.PathId;
}
/* We do not set error in this case, because we still have enough
* information about volume. */
}
err_close:
CloseHandle(disk_h);
return;
}
/* VSS provider works with volumes, thus there is no difference if
* the volume consist of spanned disks. Info about the first disk in the
* volume is returned for the spanned disk group (LVM) */
static GuestDiskAddressList *build_guest_disk_info(char *guid, Error **errp)
{
Error *local_err = NULL;
GuestDiskAddressList *list = NULL, *cur_item = NULL;
GuestDiskAddress *disk = NULL;
int i;
HANDLE vol_h;
DWORD size;
PVOLUME_DISK_EXTENTS extents = NULL;
/* strip final backslash */
char *name = g_strdup(guid);
if (g_str_has_suffix(name, "\\")) {
name[strlen(name) - 1] = 0;
}
g_debug("opening %s", name);
vol_h = CreateFile(name, 0, FILE_SHARE_READ, NULL, OPEN_EXISTING,
0, NULL);
if (vol_h == INVALID_HANDLE_VALUE) {
error_setg_win32(errp, GetLastError(), "failed to open volume");
goto out;
}
/* Get list of extents */
g_debug("getting disk extents");
size = sizeof(VOLUME_DISK_EXTENTS);
extents = g_malloc0(size);
if (!DeviceIoControl(vol_h, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, NULL,
0, extents, size, NULL, NULL)) {
DWORD last_err = GetLastError();
if (last_err == ERROR_MORE_DATA) {
/* Try once more with big enough buffer */
size = sizeof(VOLUME_DISK_EXTENTS)
+ extents->NumberOfDiskExtents*sizeof(DISK_EXTENT);
g_free(extents);
extents = g_malloc0(size);
if (!DeviceIoControl(
vol_h, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, NULL,
0, extents, size, NULL, NULL)) {
error_setg_win32(errp, GetLastError(),
"failed to get disk extents");
goto out;
}
} else if (last_err == ERROR_INVALID_FUNCTION) {
/* Possibly CD-ROM or a shared drive. Try to pass the volume */
g_debug("volume not on disk");
disk = g_malloc0(sizeof(GuestDiskAddress));
disk->has_dev = true;
disk->dev = g_strdup(name);
get_single_disk_info(disk, &local_err);
if (local_err) {
g_debug("failed to get disk info, ignoring error: %s",
error_get_pretty(local_err));
error_free(local_err);
goto out;
}
list = g_malloc0(sizeof(*list));
list->value = disk;
disk = NULL;
list->next = NULL;
goto out;
} else {
error_setg_win32(errp, GetLastError(),
"failed to get disk extents");
goto out;
}
}
g_debug("Number of extents: %lu", extents->NumberOfDiskExtents);
/* Go through each extent */
for (i = 0; i < extents->NumberOfDiskExtents; i++) {
disk = g_malloc0(sizeof(GuestDiskAddress));
/* Disk numbers directly correspond to numbers used in UNCs
*
* See documentation for DISK_EXTENT:
* https://docs.microsoft.com/en-us/windows/desktop/api/winioctl/ns-winioctl-_disk_extent
*
* See also Naming Files, Paths and Namespaces:
* https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#win32-device-namespaces
*/
disk->has_dev = true;
disk->dev = g_strdup_printf("\\\\.\\PhysicalDrive%lu",
extents->Extents[i].DiskNumber);
get_single_disk_info(disk, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto out;
}
cur_item = g_malloc0(sizeof(*list));
cur_item->value = disk;
disk = NULL;
cur_item->next = list;
list = cur_item;
}
out:
if (vol_h != INVALID_HANDLE_VALUE) {
CloseHandle(vol_h);
}
qapi_free_GuestDiskAddress(disk);
g_free(extents);
g_free(name);
return list;
}
#else
static GuestDiskAddressList *build_guest_disk_info(char *guid, Error **errp)
{
return NULL;
}
#endif /* CONFIG_QGA_NTDDSCSI */
static GuestFilesystemInfo *build_guest_fsinfo(char *guid, Error **errp)
{
DWORD info_size;
char mnt, *mnt_point;
char fs_name[32];
char vol_info[MAX_PATH+1];
size_t len;
uint64_t i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;
GuestFilesystemInfo *fs = NULL;
GetVolumePathNamesForVolumeName(guid, (LPCH)&mnt, 0, &info_size);
if (GetLastError() != ERROR_MORE_DATA) {
error_setg_win32(errp, GetLastError(), "failed to get volume name");
return NULL;
}
mnt_point = g_malloc(info_size + 1);
if (!GetVolumePathNamesForVolumeName(guid, mnt_point, info_size,
&info_size)) {
error_setg_win32(errp, GetLastError(), "failed to get volume name");
goto free;
}
len = strlen(mnt_point);
mnt_point[len] = '\\';
mnt_point[len+1] = 0;
if (!GetVolumeInformation(mnt_point, vol_info, sizeof(vol_info), NULL, NULL,
NULL, (LPSTR)&fs_name, sizeof(fs_name))) {
if (GetLastError() != ERROR_NOT_READY) {
error_setg_win32(errp, GetLastError(), "failed to get volume info");
}
goto free;
}
fs_name[sizeof(fs_name) - 1] = 0;
fs = g_malloc(sizeof(*fs));
fs->name = g_strdup(guid);
fs->has_total_bytes = false;
fs->has_used_bytes = false;
if (len == 0) {
fs->mountpoint = g_strdup("System Reserved");
} else {
fs->mountpoint = g_strndup(mnt_point, len);
if (GetDiskFreeSpaceEx(fs->mountpoint,
(PULARGE_INTEGER) & i64FreeBytesToCaller,
(PULARGE_INTEGER) & i64TotalBytes,
(PULARGE_INTEGER) & i64FreeBytes)) {
fs->used_bytes = i64TotalBytes - i64FreeBytes;
fs->total_bytes = i64TotalBytes;
fs->has_total_bytes = true;
fs->has_used_bytes = true;
}
}
fs->type = g_strdup(fs_name);
fs->disk = build_guest_disk_info(guid, errp);
free:
g_free(mnt_point);
return fs;
}
GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp)
{
HANDLE vol_h;
GuestFilesystemInfoList *new, *ret = NULL;
char guid[256];
vol_h = FindFirstVolume(guid, sizeof(guid));
if (vol_h == INVALID_HANDLE_VALUE) {
error_setg_win32(errp, GetLastError(), "failed to find any volume");
return NULL;
}
do {
GuestFilesystemInfo *info = build_guest_fsinfo(guid, errp);
if (info == NULL) {
continue;
}
new = g_malloc(sizeof(*ret));
new->value = info;
new->next = ret;
ret = new;
} while (FindNextVolume(vol_h, guid, sizeof(guid)));
if (GetLastError() != ERROR_NO_MORE_FILES) {
error_setg_win32(errp, GetLastError(), "failed to find next volume");
}
FindVolumeClose(vol_h);
return ret;
}
/*
* Return status of freeze/thaw
*/
GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
{
if (!vss_initialized()) {
error_setg(errp, QERR_UNSUPPORTED);
return 0;
}
if (ga_is_frozen(ga_state)) {
return GUEST_FSFREEZE_STATUS_FROZEN;
}
return GUEST_FSFREEZE_STATUS_THAWED;
}
/*
* Freeze local file systems using Volume Shadow-copy Service.
* The frozen state is limited for up to 10 seconds by VSS.
*/
int64_t qmp_guest_fsfreeze_freeze(Error **errp)
{
return qmp_guest_fsfreeze_freeze_list(false, NULL, errp);
}
int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
strList *mountpoints,
Error **errp)
{
int i;
Error *local_err = NULL;
if (!vss_initialized()) {
error_setg(errp, QERR_UNSUPPORTED);
return 0;
}
slog("guest-fsfreeze called");
/* cannot risk guest agent blocking itself on a write in this state */