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win32: physical drive support (initial patch by kazu) 

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
View File

@ -838,6 +838,7 @@ BlockDriver bdrv_host_device = {
#define FTYPE_FILE 0 #define FTYPE_FILE 0
#define FTYPE_CD 1 #define FTYPE_CD 1
#define FTYPE_HARDDISK 2
typedef struct BDRVRawState { typedef struct BDRVRawState {
HANDLE hfile; HANDLE hfile;
@ -1098,6 +1099,9 @@ static int64_t raw_getlength(BlockDriverState *bs)
BDRVRawState *s = bs->opaque; BDRVRawState *s = bs->opaque;
LARGE_INTEGER l; LARGE_INTEGER l;
ULARGE_INTEGER available, total, total_free; ULARGE_INTEGER available, total, total_free;
DISK_GEOMETRY dg;
DWORD count;
BOOL status;
switch(s->type) { switch(s->type) {
case FTYPE_FILE: case FTYPE_FILE:
@ -1110,6 +1114,14 @@ static int64_t raw_getlength(BlockDriverState *bs)
return -EIO; return -EIO;
l.QuadPart = total.QuadPart; l.QuadPart = total.QuadPart;
break; 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: default:
return -EIO; return -EIO;
} }
@ -1216,6 +1228,8 @@ static int find_device_type(BlockDriverState *bs, const char *filename)
if (strstart(filename, "\\\\.\\", &p) || if (strstart(filename, "\\\\.\\", &p) ||
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]); snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
type = GetDriveType(s->drive_path); type = GetDriveType(s->drive_path);
if (type == DRIVE_CDROM) 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); s->type = find_device_type(bs, filename);
if ((flags & BDRV_O_ACCESS) == O_RDWR) { if ((flags & BDRV_O_ACCESS) == O_RDWR) {
access_flags = GENERIC_READ | GENERIC_WRITE; access_flags = GENERIC_READ | GENERIC_WRITE;
} else { } else {

19
qemu-doc.texi
View File

@ -1079,14 +1079,25 @@ line option or modify the device permissions accordingly).
@subsubsection Windows @subsubsection Windows
On Windows you can use any host drives as QEMU drive. The prefered @table @code
syntax is the driver letter (e.g. @file{d:}). The alternate syntax @item CD
@file{\\.\d:} is supported. @file{/dev/cdrom} is supported as an alias The prefered syntax is the drive letter (e.g. @file{d:}). The
to the first CDROM drive. 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 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 is better to use the @code{change} or @code{eject} monitor commands to
change or eject media. 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 @subsubsection Mac OS X