#include "qemu-timer.h"
#include "block_int.h"
#include <assert.h>
+#include <windows.h>
#include <winioctl.h>
-//#define WIN32_AIO
-
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_HARDDISK 2
char drive_path[16]; /* format: "d:\" */
} BDRVRawState;
-typedef struct RawAIOCB {
- BlockDriverAIOCB common;
- HANDLE hEvent;
- OVERLAPPED ov;
- int count;
-} RawAIOCB;
-
int qemu_ftruncate64(int fd, int64_t length)
{
LARGE_INTEGER li;
} else {
create_flags = OPEN_EXISTING;
}
-#ifdef WIN32_AIO
- overlapped = FILE_FLAG_OVERLAPPED;
-#else
overlapped = FILE_ATTRIBUTE_NORMAL;
-#endif
- if (flags & BDRV_O_DIRECT)
+ if ((flags & BDRV_O_NOCACHE))
overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
+ else if (!(flags & BDRV_O_CACHE_WB))
+ overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
return 0;
}
-static int raw_pread(BlockDriverState *bs, int64_t offset,
- uint8_t *buf, int count)
+static int raw_read(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
{
BDRVRawState *s = bs->opaque;
OVERLAPPED ov;
DWORD ret_count;
int ret;
+ int64_t offset = sector_num * 512;
+ int count = nb_sectors * 512;
memset(&ov, 0, sizeof(ov));
ov.Offset = offset;
ov.OffsetHigh = offset >> 32;
ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
- if (!ret) {
-#ifdef WIN32_AIO
- ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
- if (!ret)
- return -EIO;
- else
-#endif
- return ret_count;
- }
+ if (!ret)
+ return ret_count;
+ if (ret_count == count)
+ ret_count = 0;
return ret_count;
}
-static int raw_pwrite(BlockDriverState *bs, int64_t offset,
- const uint8_t *buf, int count)
+static int raw_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
{
BDRVRawState *s = bs->opaque;
OVERLAPPED ov;
DWORD ret_count;
int ret;
+ int64_t offset = sector_num * 512;
+ int count = nb_sectors * 512;
memset(&ov, 0, sizeof(ov));
ov.Offset = offset;
ov.OffsetHigh = offset >> 32;
ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
- if (!ret) {
-#ifdef WIN32_AIO
- ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
- if (!ret)
- return -EIO;
- else
-#endif
- return ret_count;
- }
+ if (!ret)
+ return ret_count;
+ if (ret_count == count)
+ ret_count = 0;
return ret_count;
}
-#ifdef WIN32_AIO
-static void raw_aio_cb(void *opaque)
-{
- RawAIOCB *acb = opaque;
- BlockDriverState *bs = acb->common.bs;
- BDRVRawState *s = bs->opaque;
- DWORD ret_count;
- int ret;
-
- ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
- if (!ret || ret_count != acb->count) {
- acb->common.cb(acb->common.opaque, -EIO);
- } else {
- acb->common.cb(acb->common.opaque, 0);
- }
-}
-
-static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
- int64_t sector_num, uint8_t *buf, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- RawAIOCB *acb;
- int64_t offset;
-
- acb = qemu_aio_get(bs, cb, opaque);
- if (acb->hEvent) {
- acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
- if (!acb->hEvent) {
- qemu_aio_release(acb);
- return NULL;
- }
- }
- memset(&acb->ov, 0, sizeof(acb->ov));
- offset = sector_num * 512;
- acb->ov.Offset = offset;
- acb->ov.OffsetHigh = offset >> 32;
- acb->ov.hEvent = acb->hEvent;
- acb->count = nb_sectors * 512;
- qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
- return acb;
-}
-
-static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
- int64_t sector_num, uint8_t *buf, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- RawAIOCB *acb;
- int ret;
-
- acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
- if (!acb)
- return NULL;
- ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
- if (!ret) {
- qemu_aio_release(acb);
- return NULL;
- }
- qemu_aio_release(acb);
- return (BlockDriverAIOCB *)acb;
-}
-
-static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
- int64_t sector_num, uint8_t *buf, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- RawAIOCB *acb;
- int ret;
-
- acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
- if (!acb)
- return NULL;
- ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
- if (!ret) {
- qemu_aio_release(acb);
- return NULL;
- }
- qemu_aio_release(acb);
- return (BlockDriverAIOCB *)acb;
-}
-
-static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
-{
- RawAIOCB *acb = (RawAIOCB *)blockacb;
- BlockDriverState *bs = acb->common.bs;
- BDRVRawState *s = bs->opaque;
-
- qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
- /* XXX: if more than one async I/O it is not correct */
- CancelIo(s->hfile);
- qemu_aio_release(acb);
-}
-#endif /* #if WIN32_AIO */
-
static void raw_flush(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
BDRVRawState *s = bs->opaque;
- DWORD low, high;
+ LONG low, high;
low = offset;
high = offset >> 32;
switch(s->type) {
case FTYPE_FILE:
- l.LowPart = GetFileSize(s->hfile, &l.HighPart);
+ l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
return -EIO;
break;
raw_create,
raw_flush,
-#ifdef WIN32_AIO
- .bdrv_aio_read = raw_aio_read,
- .bdrv_aio_write = raw_aio_write,
- .bdrv_aio_cancel = raw_aio_cancel,
- .aiocb_size = sizeof(RawAIOCB);
-#endif
- .bdrv_pread = raw_pread,
- .bdrv_pwrite = raw_pwrite,
+ .bdrv_read = raw_read,
+ .bdrv_write = raw_write,
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
};
}
create_flags = OPEN_EXISTING;
-#ifdef WIN32_AIO
- overlapped = FILE_FLAG_OVERLAPPED;
-#else
overlapped = FILE_ATTRIBUTE_NORMAL;
-#endif
- if (flags & BDRV_O_DIRECT)
+ if ((flags & BDRV_O_NOCACHE))
overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
+ else if (!(flags & BDRV_O_CACHE_WB))
+ overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
#endif
BlockDriver bdrv_host_device = {
- "host_device",
- sizeof(BDRVRawState),
- NULL, /* no probe for protocols */
- hdev_open,
- NULL,
- NULL,
- raw_close,
- NULL,
- raw_flush,
-
-#ifdef WIN32_AIO
- .bdrv_aio_read = raw_aio_read,
- .bdrv_aio_write = raw_aio_write,
- .bdrv_aio_cancel = raw_aio_cancel,
- .aiocb_size = sizeof(RawAIOCB);
-#endif
- .bdrv_pread = raw_pread,
- .bdrv_pwrite = raw_pwrite,
- .bdrv_getlength = raw_getlength,
+ .format_name = "host_device",
+ .instance_size = sizeof(BDRVRawState),
+ .bdrv_open = hdev_open,
+ .bdrv_close = raw_close,
+ .bdrv_flush = raw_flush,
+
+ .bdrv_read = raw_read,
+ .bdrv_write = raw_write,
+ .bdrv_getlength = raw_getlength,
};
projects / qemu / blobdiff