commit db97ee6a976bacbb0d18818e951cfc41b39269a7
author Christoph Hellwig <hch@lst.de> Mon Jan 24 13:32:41 2011 +0100
committer Kevin Wolf <kwolf@redhat.com> Mon Jan 31 10:03:00 2011 +0100
tree 14c8b30a7b745f84da878aab6f35220dd701b79f
parent 6d4a2b3a47959f02e7f307f50396e70e8464f95e

block: tell drivers about an image resize

Extend the change_cb callback with a reason argument, and use it
to tell drivers about size changes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index 7ad3ddf..998df1b 100644
--- a/block.c
+++ b/block.c
@@ -645,7 +645,7 @@
         /* call the change callback */
         bs->media_changed = 1;
         if (bs->change_cb)
-            bs->change_cb(bs->change_opaque);
+            bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
     }
 
     return 0;
@@ -684,7 +684,7 @@
         /* call the change callback */
         bs->media_changed = 1;
         if (bs->change_cb)
-            bs->change_cb(bs->change_opaque);
+            bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
     }
 }
 
@@ -1135,6 +1135,9 @@
     ret = drv->bdrv_truncate(bs, offset);
     if (ret == 0) {
         ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
+        if (bs->change_cb) {
+            bs->change_cb(bs->change_opaque, CHANGE_SIZE);
+        }
     }
     return ret;
 }
@@ -1366,7 +1369,8 @@
 
 /* XXX: no longer used */
 void bdrv_set_change_cb(BlockDriverState *bs,
-                        void (*change_cb)(void *opaque), void *opaque)
+                        void (*change_cb)(void *opaque, int reason),
+                        void *opaque)
 {
     bs->change_cb = change_cb;
     bs->change_opaque = opaque;
@@ -1411,7 +1415,7 @@
         /* call the change callback now, we skipped it on open */
         bs->media_changed = 1;
         if (bs->change_cb)
-            bs->change_cb(bs->change_opaque);
+            bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
     }
     return ret;
 }