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win32: physical drive support (initial patch by kazu)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2311 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2007-01-07 22:43:30 +00:00
parent 18607dcb7c
commit 0178196398
2 changed files with 30 additions and 5 deletions
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16
block-raw.c
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@ -838,6 +838,7 @@ BlockDriver bdrv_host_device = {
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_HARDDISK 2
typedef struct BDRVRawState {
HANDLE hfile;
@ -1098,6 +1099,9 @@ static int64_t raw_getlength(BlockDriverState *bs)
BDRVRawState *s = bs->opaque;
LARGE_INTEGER l;
ULARGE_INTEGER available, total, total_free;
DISK_GEOMETRY dg;
DWORD count;
BOOL status;
switch(s->type) {
case FTYPE_FILE:
@ -1110,6 +1114,14 @@ static int64_t raw_getlength(BlockDriverState *bs)
return -EIO;
l.QuadPart = total.QuadPart;
break;
case FTYPE_HARDDISK:
status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL, 0, &dg, sizeof(dg), &count, NULL);
if (status != FALSE) {
l.QuadPart = dg.Cylinders.QuadPart * dg.TracksPerCylinder
* dg.SectorsPerTrack * dg.BytesPerSector;
}
break;
default:
return -EIO;
}
@ -1216,6 +1228,8 @@ static int find_device_type(BlockDriverState *bs, const char *filename)
if (strstart(filename, "\\\\.\\", &p) ||
strstart(filename, "//./", &p)) {
if (stristart(p, "PhysicalDrive", NULL))
return FTYPE_HARDDISK;
snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
type = GetDriveType(s->drive_path);
if (type == DRIVE_CDROM)
@ -1248,7 +1262,7 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
}
}
s->type = find_device_type(bs, filename);
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
access_flags = GENERIC_READ | GENERIC_WRITE;
} else {

19
qemu-doc.texi
View File

@ -1079,14 +1079,25 @@ line option or modify the device permissions accordingly).
@subsubsection Windows
On Windows you can use any host drives as QEMU drive. The prefered
syntax is the driver letter (e.g. @file{d:}). The alternate syntax
@file{\\.\d:} is supported. @file{/dev/cdrom} is supported as an alias
to the first CDROM drive.
@table @code
@item CD
The prefered syntax is the drive letter (e.g. @file{d:}). The
alternate syntax @file{\\.\d:} is supported. @file{/dev/cdrom} is
supported as an alias to the first CDROM drive.
Currently there is no specific code to handle removable medias, so it
is better to use the @code{change} or @code{eject} monitor commands to
change or eject media.
@item Hard disks
Hard disks can be used with the syntax: @file{\\.\PhysicalDriveN}
where @var{N} is the drive number (0 is the first hard disk).
WARNING: unless you know what you do, it is better to only make
READ-ONLY accesses to the hard disk otherwise you may corrupt your
host data (use the @option{-snapshot} command line so that the
modifications are written in a temporary file).
@end table
@subsubsection Mac OS X