Certain operations such as drive_del or resize cannot be performed
while external users (eg. block migration) reference the block device.
Add a flag to indicate that.
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
Index: qemu/block.c
===================================================================
--- qemu.orig/block.c
+++ qemu/block.c
@@ -2770,6 +2770,17 @@ int64_t bdrv_get_dirty_count(BlockDriver
return bs->dirty_count;
}
+void bdrv_set_in_use(BlockDriverState *bs, int in_use)
+{
+ assert(bs->in_use != in_use);
+ bs->in_use = in_use;
+}
+
+int bdrv_in_use(BlockDriverState *bs)
+{
+ return bs->in_use;
+}
+
int bdrv_img_create(const char *filename, const char *fmt,
const char *base_filename, const char *base_fmt,
char *options, uint64_t img_size, int flags)
Index: qemu/block_int.h
===================================================================
--- qemu.orig/block_int.h
+++ qemu/block_int.h
@@ -199,6 +199,7 @@ struct BlockDriverState {
char device_name[32];
unsigned long *dirty_bitmap;
int64_t dirty_count;
+ int in_use; /* users other than guest access, eg. block migration */
QTAILQ_ENTRY(BlockDriverState) list;
void *private;
};
Index: qemu/block.h
===================================================================
--- qemu.orig/block.h
+++ qemu/block.h
@@ -240,6 +240,8 @@ void bdrv_reset_dirty(BlockDriverState *
int nr_sectors);
int64_t bdrv_get_dirty_count(BlockDriverState *bs);
+void bdrv_set_in_use(BlockDriverState *bs, int in_use);
+int bdrv_in_use(BlockDriverState *bs);
typedef enum {
BLKDBG_L1_UPDATE,
