[PATCH v4 02/21] parallels: Move inactivation code to a separate function

[Alexander Ivanov <alexander.ivanov@virtuozzo.com>]

We are going to add parallels image extensions storage and need a separate
function for inactivation code.

Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
---
 block/parallels.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/block/parallels.c b/block/parallels.c
index 072b1efd78..992362ce29 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -1424,6 +1424,20 @@ fail:
     return ret;
 }
 
+static int GRAPH_RDLOCK parallels_inactivate(BlockDriverState *bs)
+{
+    BDRVParallelsState *s = bs->opaque;
+    int ret;
+
+    s->header->inuse = 0;
+    parallels_update_header(bs);
+
+    /* errors are ignored, so we might as well pass exact=true */
+    ret = bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true,
+                        PREALLOC_MODE_OFF, 0, NULL);
+
+    return ret;
+}
 
 static void parallels_close(BlockDriverState *bs)
 {
@@ -1432,12 +1446,7 @@ static void parallels_close(BlockDriverState *bs)
     GRAPH_RDLOCK_GUARD_MAINLOOP();
 
     if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) {
-        s->header->inuse = 0;
-        parallels_update_header(bs);
-
-        /* errors are ignored, so we might as well pass exact=true */
-        bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true,
-                      PREALLOC_MODE_OFF, 0, NULL);
+        parallels_inactivate(bs);
     }
 
     parallels_free_used_bitmap(bs);
@@ -1476,6 +1485,7 @@ static BlockDriver bdrv_parallels = {
     .bdrv_co_check              = parallels_co_check,
     .bdrv_co_pdiscard           = parallels_co_pdiscard,
     .bdrv_co_pwrite_zeroes      = parallels_co_pwrite_zeroes,
+    .bdrv_inactivate            = parallels_inactivate,
 };
 
 static void bdrv_parallels_init(void)
-- 
2.40.1