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[Qemu-devel] [5200] Let snapshot work with protocols
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [5200] Let snapshot work with protocols |
Date: |
Fri, 12 Sep 2008 17:54:14 +0000 |
Revision: 5200
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5200
Author: aliguori
Date: 2008-09-12 17:54:13 +0000 (Fri, 12 Sep 2008)
Log Message:
-----------
Let snapshot work with protocols
realpath will horribly mangle a protocol so avoid calling it if the backing
file is a protocol.
Modified Paths:
--------------
trunk/block.c
Modified: trunk/block.c
===================================================================
--- trunk/block.c 2008-09-11 19:42:00 UTC (rev 5199)
+++ trunk/block.c 2008-09-12 17:54:13 UTC (rev 5200)
@@ -338,6 +338,7 @@
if (flags & BDRV_O_SNAPSHOT) {
BlockDriverState *bs1;
int64_t total_size;
+ int is_protocol = 0;
/* if snapshot, we create a temporary backing file and open it
instead of opening 'filename' directly */
@@ -352,10 +353,21 @@
return -1;
}
total_size = bdrv_getlength(bs1) >> SECTOR_BITS;
+
+ if (bs1->drv && bs1->drv->protocol_name)
+ is_protocol = 1;
+
bdrv_delete(bs1);
get_tmp_filename(tmp_filename, sizeof(tmp_filename));
- realpath(filename, backing_filename);
+
+ /* Real path is meaningless for protocols */
+ if (is_protocol)
+ snprintf(backing_filename, sizeof(backing_filename),
+ "%s", filename);
+ else
+ realpath(filename, backing_filename);
+
if (bdrv_create(&bdrv_qcow2, tmp_filename,
total_size, backing_filename, 0) < 0) {
return -1;
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