Add flag to indicate external users to block device
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 <mtosatti@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit db593f2565dc12442d6bac9e8eaefa027dfcada9)
diff --git a/block.c b/block.c
index 998df1b..ee9edfc 100644
--- a/block.c
+++ b/block.c
@@ -2774,6 +2774,17 @@
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)
diff --git a/block.h b/block.h
index 239f729..19f4768 100644
--- a/block.h
+++ b/block.h
@@ -241,6 +241,8 @@
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,
diff --git a/block_int.h b/block_int.h
index 6ebdc3e..545ad11 100644
--- a/block_int.h
+++ b/block_int.h
@@ -199,6 +199,7 @@
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;
};