Use common objects for qemu-img and qemu-nbd

Right now, we sprinkle #if defined(QEMU_IMG) && defined(QEMU_NBD) all over the
code.  It's ugly and causes us to have to build multiple object files for
linking against qemu and the tools.

This patch introduces a new file, qemu-tool.c which contains enough for
qemu-img, qemu-nbd, and QEMU to all share the same objects.

This also required getting qemu-nbd to be a bit more Windows friendly.  I also
changed the Windows block-raw to use normal IO instead of overlapping IO since
we don't actually do AIO yet on Windows.  I changed the various #if 0's to
 #if WIN32_AIO to make it easier for someone to eventually fix AIO on Windows.

After this patch, there are no longer any #ifdef's related to qemu-img and
qemu-nbd.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5226 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 16 insertions, 25 deletions

diff --git a/block-raw-win32.c b/block-raw-win32.c
index 7b88dcf482..2c3f88f051 100644
--- a/block-raw-win32.c
+++ b/block-raw-win32.c
@@ -22,14 +22,13 @@
  * THE SOFTWARE.
  */
 #include "qemu-common.h"
-#ifndef QEMU_IMG
 #include "qemu-timer.h"
-#include "exec-all.h"
-#endif
 #include "block_int.h"
 #include <assert.h>
 #include <winioctl.h>
 
+//#define WIN32_AIO
+
 #define FTYPE_FILE 0
 #define FTYPE_CD     1
 #define FTYPE_HARDDISK 2
@@ -100,10 +99,10 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
     } else {
         create_flags = OPEN_EXISTING;
     }
-#ifdef QEMU_IMG
-    overlapped = FILE_ATTRIBUTE_NORMAL;
-#else
+#ifdef WIN32_AIO
     overlapped = FILE_FLAG_OVERLAPPED;
+#else
+    overlapped = FILE_ATTRIBUTE_NORMAL;
 #endif
     if (flags & BDRV_O_DIRECT)
         overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
@@ -133,10 +132,12 @@ static int raw_pread(BlockDriverState *bs, int64_t 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;
     }
     return ret_count;
@@ -155,17 +156,18 @@ static int raw_pwrite(BlockDriverState *bs, int64_t 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;
     }
     return ret_count;
 }
 
-#if 0
-#ifndef QEMU_IMG
+#ifdef WIN32_AIO
 static void raw_aio_cb(void *opaque)
 {
     RawAIOCB *acb = opaque;
@@ -181,7 +183,6 @@ static void raw_aio_cb(void *opaque)
         acb->common.cb(acb->common.opaque, 0);
     }
 }
-#endif
 
 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
         int64_t sector_num, uint8_t *buf, int nb_sectors,
@@ -204,9 +205,7 @@ static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
     acb->ov.OffsetHigh = offset >> 32;
     acb->ov.hEvent = acb->hEvent;
     acb->count = nb_sectors * 512;
-#ifndef QEMU_IMG
     qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
-#endif
     return acb;
 }
 
@@ -226,9 +225,7 @@ static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
         qemu_aio_release(acb);
         return NULL;
     }
-#ifdef QEMU_IMG
     qemu_aio_release(acb);
-#endif
     return (BlockDriverAIOCB *)acb;
 }
 
@@ -248,15 +245,12 @@ static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
         qemu_aio_release(acb);
         return NULL;
     }
-#ifdef QEMU_IMG
     qemu_aio_release(acb);
-#endif
     return (BlockDriverAIOCB *)acb;
 }
 
 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 {
-#ifndef QEMU_IMG
     RawAIOCB *acb = (RawAIOCB *)blockacb;
     BlockDriverState *bs = acb->common.bs;
     BDRVRawState *s = bs->opaque;
@@ -265,9 +259,8 @@ static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
     /* XXX: if more than one async I/O it is not correct */
     CancelIo(s->hfile);
     qemu_aio_release(acb);
-#endif
 }
-#endif /* #if 0 */
+#endif /* #if WIN32_AIO */
 
 static void raw_flush(BlockDriverState *bs)
 {
@@ -356,9 +349,7 @@ void qemu_aio_flush(void)
 
 void qemu_aio_wait(void)
 {
-#ifndef QEMU_IMG
     qemu_bh_poll();
-#endif
 }
 
 BlockDriver bdrv_raw = {
@@ -372,7 +363,7 @@ BlockDriver bdrv_raw = {
     raw_create,
     raw_flush,
 
-#if 0
+#ifdef WIN32_AIO
     .bdrv_aio_read = raw_aio_read,
     .bdrv_aio_write = raw_aio_write,
     .bdrv_aio_cancel = raw_aio_cancel,
@@ -458,10 +449,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
     }
     create_flags = OPEN_EXISTING;
 
-#ifdef QEMU_IMG
-    overlapped = FILE_ATTRIBUTE_NORMAL;
-#else
+#ifdef WIN32_AIO
     overlapped = FILE_FLAG_OVERLAPPED;
+#else
+    overlapped = FILE_ATTRIBUTE_NORMAL;
 #endif
     if (flags & BDRV_O_DIRECT)
         overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
@@ -524,7 +515,7 @@ BlockDriver bdrv_host_device = {
     NULL,
     raw_flush,
 
-#if 0
+#ifdef WIN32_AIO
     .bdrv_aio_read = raw_aio_read,
     .bdrv_aio_write = raw_aio_write,
     .bdrv_aio_cancel = raw_aio_cancel,