commit 48ac0a4df84662f23da25262443e1810b70c2228
author Wen Congyang <wency@cn.fujitsu.com> Fri May 15 15:51:36 2015 +0800
committer Jeff Cody <jcody@redhat.com> Tue Jul 14 21:50:13 2015 -0400
tree 16ae278a96c3b019ab94d0b7b0889043a718d649
parent 17d9716d7b5381c4b6566bb1a06267d2bfcd1821

mirror: correct buf_size

If bus_size is less than 0, the command fails.
If buf_size is 0, use DEFAULT_MIRROR_BUF_SIZE.
If buf_size % granularity is not 0, mirror_free_init() will
do dangerous things.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 5555A588.3080907@cn.fujitsu.com
Signed-off-by: Jeff Cody <jcody@redhat.com>

blockdev.c

diff --git a/blockdev.c b/blockdev.c
index 50421c8..62a4586 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2639,8 +2639,6 @@
     aio_context_release(aio_context);
 }
 
-#define DEFAULT_MIRROR_BUF_SIZE   (10 << 20)
-
 void qmp_drive_mirror(const char *device, const char *target,
                       bool has_format, const char *format,
                       bool has_node_name, const char *node_name,
@@ -2682,7 +2680,7 @@
         granularity = 0;
     }
     if (!has_buf_size) {
-        buf_size = DEFAULT_MIRROR_BUF_SIZE;
+        buf_size = 0;
     }
     if (!has_unmap) {
         unmap = true;