qemu: Don't try to find compression program for "raw" memory images

There's nothing to compress if the requested snapshot memory format is
set to 'raw' explicitly. After commit 9e14689ea libvirt would try to
run /sbin/raw to process the memory stream if the qemu.conf option
snapshot_image_format is set.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1402726

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a8ae3fe0d009bcfb2a2db1828df9ab3f0a037527..2997f1f95d7edb4b7b73b7562fbde13decd9403b 100644 (file)
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3291,6 +3291,9 @@ qemuGetCompressionProgram(const char *imageFormat,
     if ((ret = qemuSaveCompressionTypeFromString(imageFormat)) < 0)
         goto error;
 
+    if (ret == QEMU_SAVE_FORMAT_RAW)
+        return QEMU_SAVE_FORMAT_RAW;
+
     if (!(*compresspath = virFindFileInPath(imageFormat)))
         goto error;